Holding device and belt for holding device
阅读说明:本技术 保持装置和用于保持装置的带 (Holding device and belt for holding device ) 是由 D·博斯谢尔 于 2019-01-25 设计创作,主要内容包括:本发明涉及一种保持装置(10),其包括具有上表面(12A)和下表面(12B)并在纵向方向上延伸的连续的基部(12),并且包括从基部(12)的上表面(12A)延伸的多个保持元件(16),每个保持元件包括杆(18)。基部(12)包括至少一个没有保持元件的区域(20),使得所述多个保持元件(16)形成至少一个设计(14)。本发明还涉及一种用于保持装置的带。(The invention relates to a retaining device (10) comprising a continuous base (12) having an upper surface (12A) and a lower surface (12B) and extending in a longitudinal direction, and comprising a plurality of retaining elements (16) extending from the upper surface (12A) of the base (12), each retaining element comprising a rod (18). The base (12) comprises at least one area (20) free of retaining elements, such that the plurality of retaining elements (16) forms at least one design (14). The invention also relates to a belt for a holding device.)
1. A holding device (10) comprising:
-a continuous base (12) having an upper surface (12A) and a lower surface (12B); and
-a plurality of retaining elements (16) extending from the upper surface (12A) of the base (12), each retaining element (16) comprising a rod (18);
the base (12) comprises at least one region (20) free of retaining elements, such that the plurality of retaining elements (16) forms at least one pattern (14), wherein the pattern (14) is repeated in a peeling direction, the peeling force measured according to the "180 ° peeling" method having at least two peaks (P1-P4) the maximum of which increases with the opening stroke and at least one valley (V1-V3) comprised between the two peaks (P1-P4), the at least one valley having a minimum value of the maximum value of the peeling force which is less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40%.
2. Holding device (10) according to claim 1, wherein the pattern (14) is repeated in a peeling direction, the peeling force measured according to the "180 ° peeling" method having at least three peaks, each valley being comprised between two consecutive peaks, the maximum of the peaks increasing with the opening stroke, and at least two valleys having a minimum value of less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40% of the maximum value of the peeling force.
3. Holding device (10) according to claim 1 or 2, wherein the device comprises a region (20) without holding elements that is continuous in a direction perpendicular to the peeling direction.
4. Holding device (10) according to claim 3, wherein the regions (20) without holding elements that are continuous in a direction perpendicular to the peeling direction have a width measured in the peeling direction that is greater than or equal to 2 rows of holding elements measured in the peeling direction, preferably greater than or equal to 3 rows of holding elements measured in the peeling direction.
5. Holding device (10) according to claim 3, wherein the area free of holding elements which is continuous in a direction perpendicular to the peeling direction has a width measured in the peeling direction which is greater than or equal to 1%, preferably greater than or equal to 2%, preferably greater than or equal to 4%, even more preferably greater than or equal to 5%, still more preferably greater than or equal to 10% of the width of the base measured in the peeling direction.
6. The holding device (10) according to any one of claims 1 to 5, wherein a color difference Δ E between the at least one region without holding elements and at least a portion of the pattern formed by the plurality of holding elements in the CIE L a b color space is greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
7. The holding device (10) according to any one of claims 1 to 6, wherein the holding device comprises the stem covered by a head.
8. The holding device (10) according to any one of claims 1 to 7, wherein the surface of the area free of holding elements is greater than or equal to 5%, preferably greater than or equal to 10%, even more preferably greater than or equal to 15% of the total surface of the base.
9. The holding device (10) according to any one of claims 1 to 8, comprising a woven or nonwoven web (22), or a thermoplastic film, or an elastic film, or a composite film.
10. The holding device (10) according to any one of claims 1 to 9, wherein the base (12) has a thickness (E) measured perpendicular to the upper surface (12A) of the base (12) of between 10 μ ι η and 700 μ ι η, the height (H) of the holding element (16) measured perpendicular to the upper surface (12A) of the base (12) being between 3 and 10 times the thickness of the base (12).
11. A belt (26) for a holding device according to any one of claims 1 to 10, the belt (26) being intended to be cut into a plurality of holding devices (10).
Technical Field
The present disclosure relates to a retention device comprising protruding elements such as rods and/or preforms and/or hooks, for example intended to cooperate with hooks and/or loop fittings (counters).
Background
In particular, in the hygiene field, retaining devices, for example with hooks, are used and cooperate with a ring fitting forming the application area of the retaining device.
When the user places the holding means on the application area, the user may question whether he has placed the holding means correctly (correct) on the application area. This application area is commonly referred to in the field of "comfort web" hygiene as "landing area" or is identified by the expression "landing area". Due to the fact that the holding means is properly (correctly) maintained on the application area, the fact that the user determines that he has correctly placed the holding means on the application area will affect the perception (perception) the user has.
For example, the user may also have to reposition the holding device on the application area in order to better adjust the article and/or remove the article.
The peel force is typically the force that the user will apply to the holding means to separate the holding means from the application area. Due to the fact that the holding means is properly maintained on the application area, the ease with which the user can separate the holding means from the application area will influence the perception that the user has. In some extreme cases, low peel forces may lead to accidental detachment of the retention device and accidental detachment of the application area.
Therefore, there is a need to improve the actual feel (feeling)/quality and/or the feel/quality perceived by the user when the user uses the holding device in a closed and/or open manner.
Disclosure of Invention
The present disclosure aims to at least partially overcome these drawbacks by proposing a holding device that is easy to use, visible, perceptible (cognitive) and intuitive for the user.
To this end, according to a first aspect, the present disclosure relates to a holding device comprising:
-a continuous base having an upper surface and a lower surface;
-a plurality of retaining elements extending from the upper surface of the base, each retaining element comprising a rod;
the base comprises at least one region free of retaining elements, such that the plurality of retaining elements forms at least one pattern, the color difference Δ Ε between the at least one region free of retaining elements and at least a portion of the pattern formed by the plurality of retaining elements, in the CIE L a b color space, being greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
By "pattern", it is understood that the distribution of the retaining elements over the entire base is not uniform. Thus, although the retaining elements may be evenly spaced on the base to form a pattern, some areas of the base are free of retaining elements and allow the pattern to be defined.
The pattern comprises a pattern surface corresponding to a surface covered by circles of a radius corresponding to the average pitch, and the center of each circle is positioned on the center of the holding element, respectively, when viewed from above, the circumference of each circle passing through the center of at least one adjacent holding element. The average pitch may correspond to the distance separating two adjacent retaining elements. At least one area free of retaining elements is a surface not covered by the patterned surface.
The color difference Δ E between the area without the retaining element and at least a part of the pattern formed by the plurality of retaining elements is greater than or equal to 1.0, the user can visually identify the pattern formed by the plurality of retaining elements and thus determine that he is properly placing the pattern on the application area (such as for example a ring fitting). This therefore allows to improve the actual feel/quality and/or the feel/quality perceived by the user when the user uses the holding device in a closed and/or open manner.
The CIE L a b color space or CIE L a b color space (chromatographic space), commonly known as CIELAB, is the most widely used space and is published by the international commission on illumination (CIE) in order to characterize surface colors. This space describes all colors visible to the human eye and was created for reference. In this space, the sharpness L varies from 0(═ black) to 100(═ white), the parameter a represents the value on the axis of variation from green to red, and the parameter b represents the value on the axis of variation from blue to yellow. Calculating a color difference Δ E between a region without a retaining element and at least a portion of a pattern formed by the plurality of retaining elements according to equation (1):
the values L, a and b are measured, for example, with a spectrocolorimeter under natural light (at reference values D65/10 °) of the aliccard (x-rite pantone) type RM200QC on a white support. The spectrometer is particularly suitable for measuring greater than or equal to 4mm2Of (2) is provided.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with retaining elements having a color difference Δ E in CIE L a b color space between at least one region without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements, the color difference Δ E being greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, still more preferably greater than or equal to 4.5.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with retaining elements having a color difference Δ E in the CIE L a b color space between a first region provided with retaining elements and a second region provided with retaining elements, the color difference Δ E being greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
In some embodiments, the retaining element comprises a rod covered (surmount) by the head.
The stem includes a lower end coupled to the base and an upper end opposite the lower end, and the head covers the upper end of the stem.
This type of holding element may be, for example, a preform and/or a hook.
In some embodiments, the surface of the area without the retaining element is greater than or equal to 5%, preferably greater than or equal to 10%, even more preferably greater than or equal to 15% of the total surface of the base.
Typically, the retaining element is not present on the edge of the base. Thus, for a holder that does not comprise a pattern, that is to say a holder in which the holding elements are distributed uniformly over the entire base, there may be a web (web) along the edge of the base without holding elements. However, these webs, due to their straight shape, do not have sufficient surface to allow a user to identify the pattern. Therefore, the user does not recognize the region without the holding member as the region defining the pattern. It should be understood that the narrow areas that normally form the web on the edges of the holders are not delimited on each side by a holder (border).
In some embodiments, the pattern is a single pattern.
"unitary pattern" refers to a pattern of isolated in an area of the base, measuring 25.4mm or 30.0mm or 35.0mm in the MD direction and 13.0mm or 25.0mm or 25.4mm in the CD direction.
The "MD Direction" is an acronym for "Machine Direction" (Machine Direction) according to the Direction in which the base moves in the Machine during manufacture of the holding device, and the "CD Direction" is an acronym for "Cross Direction" (Cross Direction) according to a Direction perpendicular to the MD Direction.
The pattern may for example have a pattern that can be recognized by the user, such as a unique logo or trademark.
In some embodiments, the pattern is a repeating pattern.
The pattern may for example have a smaller size than a single pattern, but may be repeated a number of times.
In some embodiments, the repeating pattern may be a complex pattern.
"Complex pattern" refers to a pattern comprising a plurality of entities (entities) that are different from each other, the complex pattern itself repeating at least once.
In some embodiments, the pattern has a closed contour.
"closed contour" refers to a curve whose two ends coincide.
In some embodiments, the pattern is arranged such that the force exerted on the holding means is divided between at least a first component that becomes a peeling force and a second component that becomes a shearing force when the holding means is biased in an open manner.
In some embodiments, in the CIE XYZ color space, the difference in opacity (difference in opacity) between the at least one region without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
The CIE XYZ color space is a color space defined by the international commission on illumination. The component Y of the CIE XYZ space corresponds to the brightness (luminance) of the surface, that is to say the luminosity (luminance). Opacity (Opacity) expressed in percentage is calculated according to equation (2) according to standard ASTM D2805:
wherein, YBlack background(Yblack background) Is a measurement of Y performed on a black support,
Ywhite background(Ywhite background) Is a measurement of Y performed on a white support.
YBlack backgroundAnd YWhite backgroundThe values of (b) are measured, for example, with a spectrocolorimeter on a white support and a black support in natural light of the aliccard RM200QC type (at reference value D65/10 °).
The opacity difference between the area without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is equal to the absolute value of the difference between the opacity values obtained for the area without retaining elements and for at least a portion of the pattern formed by the plurality of retaining elements.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with a retaining element having an opacity difference in the CIE XYZ color space between at least one region without a retaining element and at least a part of the pattern formed by the plurality of retaining elements, which opacity difference is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with a retaining element having, in the CIE XYZ color space, an opacity difference between a first region provided with a retaining element and a second region provided with a retaining element, which opacity difference is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material.
As non-limiting examples of thermoplastic materials, mention may be made of: polyolefins, polyethylene, LLDPE (linear low density polyethylene), LDPE (low density polyethylene), m-PE (metallocene polyethylene), HDPE (high density polyethylene), EVA (ethylene vinyl acetate) and PP (polypropylene), including monomodal or multimodal (e.g. bimodal) molecular weight distributions, in particular including LLDPE and compositions with plastomers, in particular polyethylene based plastomers. Polyamides (PA), polylactic acids (PLA), Polyhydroxyalkanoates (PHA), PVOH, PBS, polyesters, polyvinyl chloride (PVC) or Acrylonitrile Butadiene Styrene (ABS) may also be used.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material that includes a dye.
The dye may be, for example, a white dye, such as may relate to the reference 50PP sold by cabat, loaded with 50% by mass (50% by mass) of TiO2. As a further dye, reference UN55206 manufactured by colorserivice may also be mentioned. These examples are given as non-limiting examples.
The dye allows to increase the visual contrast between the areas without retaining elements and the pattern formed by the plurality of retaining elements.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material comprising at most 2% by mass of dye, preferably at most 1.5% by mass of dye, even more preferably at most 1% by mass of dye.
In some embodiments, an end of each retaining element furthest from the base comprises a coloured coating.
Thus, a coloured coating may be deposited, for example inks or dyes, such as those typically used in flexography (flexography) and/or pad printing (pad printing) and/or rotogravure (rotograure) and/or screen printing (serigraphy) and/or offset printing (heliography), so as to deposit a coloured coating on the end of each retaining element furthest from the base. The ink may be solvent-based or water-based or uv-crosslinkable.
Inks generally consist of a mixture of three components: coloring substances, in particular pigments or dyes; a vehicle forming the fluid phase of the ink, such as a mixture of polymers, diluents and/or solvents or water; and additives such as dispersants and defoamers, which can optimize the characteristics of the ink.
As a mixture of polymers, a mixture comprising, for example, up to 50% by mass of various acetates (such as ethyl acetate, N-propyl acetate, isopropyl acetate, N-butyl acetate and mixtures thereof) and/or up to 10% by mass of alcohol may be used.
Organic or mineral pigments such as diazo (diazo) dyes, anthraquinone dyes, xanthenes, azines and the like, titanium dioxide, carbon black, iron oxide, chromium oxide and the like may be used.
As non-limiting examples of inks, an ink sold by ULTRA under the reference "Type Series 30,000ALC polyamine" or an ink sold by DOMECK EUROFLEX under the reference "Type Series EURO-Film PXA" may be used.
It will be appreciated that the pigmented coating may be deposited on uncolored or colored thermoplastic material in order to increase the contrast between the areas without retaining elements and the pattern formed by the plurality of retaining elements.
Typically, an ink roller (inking roller) is coated with ink or dye and a holding device is driven to bring a holding element into contact with the ink roller. Thus, the end of each retaining element furthest from the base will be covered with a coloured coating for enhancing the visibility of the pattern.
In some embodiments, the pattern is repeated in the peeling direction, the peeling force measured according to the "180 ° peeling" method has at least two peaks and at least one valley comprised between the two peaks, the maximum value of the peaks increasing with the opening stroke, the at least one valley has a minimum value of the maximum value of the peeling force of less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40%.
The "180 ° peel" method is a method that allows measurement of the peel force, that is, the force that separates the holding means from the application area. The method is described below.
Conditioning of samples-the samples to be tested are conditioned for 2h (hours) at 23 ℃ C. +/-2 ℃ C. and a relative humidity of 50% +/-5%.
Preparation of the holding device-the holding device is usually used in the CD direction. The retaining means is typically in the form of a belt (tape) having a length in the MD direction. A part of the tape in the MD direction was glued at 80g/cm2And a 2kg (kilogram) roller is applied to or rotated on the holding means in one direction and then applied to or rotated on the entire length of the portion of the belt in the other direction (round trip). The paper and the holding device are cut into strips (strip) with a width of 25.4mm (millimeters) in the CD direction using scissors at a speed of approximately 700mm/min (millimeters per minute). The length of each paper strip is 210mm and the retaining means is located in the centre of the strip.
Preparation of the application area-the sample from the application area has a width in the MD direction of 50mm and a length of at most 200mm, and the sample is cut in half according to the length.
Assembly-the strip is placed on the sample from the application area so that the holding means is centred on the sample from the application area. A 2kg (kilogram) roller was applied to or rotated on the strip in one direction and then applied to or rotated on the entire length of the strip in the other direction (round trip) at a speed of approximately 700 mm/min. The sample from the application area was placed in the grips of a cradle, the cut side was located in the grips, and a 1kg weight was hung on the lower portion of the strip for 10 seconds (seconds). The weight was then removed. This step allows ensuring the correct assembly of the holding means and the sample from the application area.
Measure-the assembly is then set in a tensile tester comprising a 100N (newton) measuring cell. The strip is inserted into the upper (movable) jaw. The reading of the force cell is set to zero. The sample from the application area was inserted into the lower (fixed) jaw and a slight tension was created. The force must be comprised between 0.02N and 0.05N. During installation, the jaws are spaced 50mm from each other. The assembly is centered between the two jaws. The test was performed with a constant movement (motion) of 305mm/min with a test stroke of 50 mm. The test stroke is adjusted according to the width of the holding device to be tested.
It is understood that a valley is located between two consecutive peaks. Since the peeling curve is not smooth, in order to distinguish one peak from another, it is considered that a new peak exists when the difference between the maximum values of the two peaks is at least 10% of the maximum value of the measured maximum force, that is, more than 10% of the maximum value of the maximum peak value. The peaks and valleys have (each) a point and a base (base) which may preferably be greater than 1mm wide, more particularly greater than 2mm wide, and in some cases greater than 3mm wide.
Since the peel force has at least two consecutive peaks separated by a valley, the peak value of the peel force increases with the opening stroke, and the user feels this increased force required to separate the holding means from the application area. Therefore, he perceives that the holding device is well maintained on the application area. Furthermore, the maximum value of the peeling force is such that the retaining device does not detach from the application area in an undesired manner.
It is generally considered that the peel force obtained according to the "180 ° peel" method (which is greater than or equal to 1.8N) allows to avoid accidental detachment of the retaining means and the application area, independently of the latter.
In some embodiments, the pattern is repeated in the peeling direction, the peeling force measured according to the "180 ° peeling" method has at least three peaks and at least two valleys, each valley being comprised between two consecutive peaks, the maximum value of the peaks increasing with the opening stroke, the valleys having a minimum value of the maximum value of the peeling force of less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40%.
In some embodiments, the device comprises a region free of retaining elements that is continuous in a direction perpendicular to the peeling direction.
In some embodiments, the regions without retaining elements that are continuous in the direction perpendicular to the peeling direction have a width, measured along the peeling direction, that is greater than or equal to 2 rows of retaining elements, measured along the peeling direction, preferably greater than or equal to 3 rows of retaining elements, measured along the peeling direction.
Although these continuous areas without retaining elements have a small width, they allow to define the pattern formed by the retaining elements, since each of their sides is delimited by the retaining means.
In some embodiments, the area free of retaining elements that is continuous in the direction perpendicular to the peeling direction has a width, measured in the peeling direction, that is greater than or equal to 1%, preferably greater than or equal to 2%, preferably greater than or equal to 4%, even more preferably greater than or equal to 5%, even more preferably greater than or equal to 10% of the width, measured in the peeling direction, of the base.
In some embodiments, the retaining means comprises a woven (woven) or nonwoven web, or a thermoplastic film, or an elastic film or, a composite film.
A woven or nonwoven web, or a thermoplastic film, or an elastic film, or a composite film serves as a support for the base.
"non-woven" refers to the product obtained at the end of the lap (lap) formation of the fibres and/or filaments that have been consolidated. Consolidation (consolidation) may be mechanical, chemical or thermal and results in bonds (bonds) between fibers and/or filaments. Such consolidation may be direct, that is to say directly between the fibres and/or filaments by welding, or indirect, that is to say by means of an intermediate layer between the fibres and/or filaments, for example a glue layer or an adhesive layer. The term "nonwoven" refers to a structure in the form of a band or lap joint of fibers and/or filaments that are entangled in a non-uniform, uneven or random manner. The nonwoven may have a single-layer structure or a multi-layer structure. The nonwoven may also be combined with another material to form a laminate. The nonwoven may be made of various synthetic and/or natural materials. Natural materials are, for example, cellulose fibers, such as cotton, jute, flax, etc., and may also include reprocessed cellulose fibers, such as rayon or viscose. Natural fibers for nonwoven materials can be prepared using various methods such as carding. For example, synthetic materials include, but are not limited to, synthetic plastic polymers that are known to form fibers including, but not limited to: polyolefins such as polyethylene, polypropylene, polybutylene, and the like; polyamides, such as polyamide 6, polyamide 6.6,
The web is not limited to being nonwoven and may more generally be a woven material, a knitted material, or a combination of a plurality of such materials.
"thermoplastic film" refers to a film made of a thermoplastic material, which may be an elastomeric material or a non-elastomeric material.
"thermoplastic film made of an elastic material" means a film which can be stretched without breaking under the action of a stretching force applied in the transverse direction and can substantially recover its shape and its original dimensions after relaxation of the stretching force. For example, at room temperature (23 ℃), the film retains a residual SET or residual (reference) after elongation and relaxation that is less than 20%, more preferably less than 5%, of its initial dimension (before elongation) for an elongation of 100% of its initial dimension.
"thermoplastic film made of an inelastic material" means a film that does not fall within the definition of a thermoplastic film made of an elastic material.
In some embodiments, the base is overmolded onto the web.
In some embodiments, the base has a thickness, measured perpendicular to the upper surface of the base, greater than or equal to 10 μm, preferably greater than or equal to 50 μm, and less than or equal to 700 μm, preferably less than or equal to 500 μm, even more preferably less than or equal to 100 μm.
In some embodiments, the base can have a constant or non-constant thickness between two opposing edges of the base (e.g., between two opposing edges extending in the CD direction or the MD direction). The base may be continuous or discontinuous between two opposing edges of the base (e.g., between two opposing edges extending in the CD or MD direction).
In some embodiments, the height of the retaining element, measured perpendicular to the upper surface of the base, is comprised between 3 and 10 times the thickness of the base.
In some embodiments, the base has a thickness, measured perpendicular to the upper surface of the base, comprised between 10 μ ι η and 700 μ ι η, and the height of the retaining element, measured perpendicular to the upper surface of the base, is comprised between 3 times and 10 times the thickness of the base.
In some embodiments, the height of the retaining element is greater than or equal to 35 μm, preferably greater than or equal to 55 μm, even more preferably greater than or equal to 80 μm, and less than or equal to 500 μm, preferably less than or equal to 350 μm, even more preferably less than or equal to 120 μm.
For example, the height of the retaining element may be comprised between 80 μm and 350 μm, or between 55 μm and 120 μm.
In some embodiments, wherein the diameter of the inscribed retention element (perpendicular to the retention element when viewed from above) is greater than or equal to 80 μm, preferably greater than or equal to 250 μm, and less than or equal to 500 μm, preferably less than or equal to 450 μm.
In some embodiments, the minimum distance between two holding elements is comprised between 0.1mm and 10 mm.
In some embodiments, the density of the retaining elements of the pattern is greater than or equal to 20 retaining elements per square centimeter, preferably greater than or equal to 50 retaining elements per square centimeter, even more preferably greater than or equal to 100 retaining elements per square centimeter, and less than or equal to 250 retaining elements per square centimeter, preferably less than or equal to 200 retaining elements per square centimeter, even more preferably less than or equal to 150 retaining elements per square centimeter.
According to a second aspect, the present disclosure also relates to a holding device comprising:
-a continuous base having an upper surface and a lower surface;
-a plurality of retaining elements extending from the upper surface of the base, each retaining element comprising a rod;
the base comprises at least one area free of retaining elements, such that the plurality of retaining elements forms at least one pattern, wherein the pattern is repeated in a peeling direction, the peeling force measured according to the "180 ° peeling" method has at least two peaks and at least one valley comprised between the two peaks, the maximum value of the peaks increasing with the opening stroke, the at least one valley has a minimum value of the maximum value of the peeling force of less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40%.
By "pattern", it is understood that the distribution of the retaining elements over the entire base is not uniform. Thus, although the retaining elements may be evenly spaced on the base to form a pattern, some areas of the base are free of retaining elements and are capable of defining a pattern.
The pattern comprises a pattern surface corresponding to a surface covered by circles of a radius corresponding to the average pitch, and the center of each circle is positioned on the center of the holding element, respectively, when viewed from above. The average pitch may correspond to the distance separating two adjacent retaining elements. At least one area free of retaining elements is a surface not covered by the patterned surface.
Since the peel force has at least two consecutive peaks separated by a valley, the peak value of the peel force increases with the opening stroke, and the user will feel this increased force needed to separate the holding means from the application area. He therefore perceives that the holding means has been properly maintained on the application area. Furthermore, the maximum value of the peeling force is such that the retaining device does not detach from the application area in an undesired manner. This therefore allows to improve the actual feel/quality and/or the feel/quality perceived by the user when the user uses the holding device in a closed and/or open manner.
The peaks and valleys (each) have a point and a base which may preferably be greater than 1mm wide, more particularly greater than 2mm wide, and in some cases greater than 3mm wide.
It is generally considered that the peel force (greater than or equal to 1.8N) obtained according to the "180 ° peel" method allows to avoid accidental detachment of the retaining means and the application area, independently of the latter.
In some embodiments, the pattern is repeated in the peeling direction, the peeling force measured according to the "180 ° peeling" method has at least three peaks and at least two valleys, each valley being comprised between two consecutive peaks, the maximum value of the peaks increasing with the opening stroke, the valleys having a minimum value of the maximum value of the peeling force of less than or equal to 85%, preferably less than or equal to 70%, even more preferably less than or equal to 60%, even more preferably less than or equal to 50%, even more preferably less than or equal to 40%.
In some embodiments, the device comprises a region free of retaining elements that is continuous in a direction perpendicular to the peeling direction.
In some embodiments, the regions without retaining elements that are continuous in the direction perpendicular to the peeling direction have a width, measured along the peeling direction, that is greater than or equal to 2 rows of retaining elements, measured along the peeling direction, preferably greater than or equal to 3 rows of retaining elements, measured along the peeling direction.
In some embodiments, the area free of retaining elements that is continuous in the direction perpendicular to the peeling direction has a width, measured along the peeling direction, that is greater than or equal to 1%, preferably greater than or equal to 2%, preferably greater than or equal to 4%, even more preferably greater than or equal to 5%, even more preferably greater than or equal to 10% of the width of the base, measured along the peeling direction.
In some embodiments, the color difference Δ E between the at least one region without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements in the CIE L a b color space is greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with retaining elements having a color difference Δ E in CIE L a b color space between at least one region without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements, the color difference Δ E being greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with retaining elements having a color difference Δ E in the CIE L a b color space between a first region provided with retaining elements and a second region provided with retaining elements, the color difference Δ E being greater than or equal to 1.0, preferably greater than or equal to 1.5, even more preferably greater than or equal to 3.0, even more preferably greater than or equal to 4.5.
In some embodiments, the retaining device comprises a stem covered by a head.
In some embodiments, the surface of the area without the retaining element is greater than or equal to 5%, preferably greater than or equal to 10%, even more preferably greater than or equal to 15% of the total surface of the base.
In some embodiments, the pattern is a single pattern.
"unitary pattern" refers to a pattern that is isolated in an area of the base, measuring 25.4mm or 30.0mm or 35.0mm in the MD direction and 13.0mm or 25.0mm or 25.4mm in the CD direction.
The pattern may for example represent a pattern that can be recognized by a user, such as a unique logo or trademark.
In some embodiments, the pattern is a repeating pattern.
In some embodiments, the repeating pattern may be a complex pattern.
In some embodiments, the pattern has a closed contour.
In some embodiments, the pattern is arranged such that the force exerted on the holding means is divided at least between a first component being a peeling force and a second component being a shearing force when the holding means is biased in an open manner.
In some embodiments, in the CIE XYZ color space, the difference in opacity between the at least one region without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with a retaining element having an opacity difference in the CIE XYZ color space between at least one region without a retaining element and at least a part of the pattern formed by the plurality of retaining elements, which opacity difference is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
In some embodiments, there are a plurality of regions provided with retaining element(s), each region provided with a retaining element having, in the CIE XYZ color space, an opacity difference between a first region provided with a retaining element and a second region provided with a retaining element, which opacity difference is greater than or equal to 1, preferably greater than or equal to 2, even more preferably greater than or equal to 3.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material.
In some embodiments, the base and the plurality of retaining devices are made in one piece.
In other words, the base and the plurality of holding elements are made of the same material in which there is no interface at the junction between the base and the plurality of holding elements.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material that includes a dye.
In some embodiments, the base and the plurality of retaining elements are made of a thermoplastic material comprising at most 2% by mass of dye, preferably at most 1.5% by mass of dye, even more preferably at most 1% by mass of dye.
In some embodiments, an end of each retaining element furthest from the base comprises a coloured coating.
In some embodiments, the retention device comprises a woven or nonwoven web, or a thermoplastic film, or an elastic film, or a composite film.
In some embodiments, the base is overmolded onto the web.
In some embodiments, the base has a thickness, measured perpendicular to the upper surface of the base, greater than or equal to 10 μm, preferably greater than or equal to 50 μm, and less than or equal to 700 μm, preferably less than or equal to 500 μm, even more preferably less than or equal to 100 μm.
In some embodiments, the base can have a constant or non-constant thickness between two opposing edges of the base (e.g., between two opposing edges extending in the CD direction or the MD direction). The base may be continuous or discontinuous between two opposing edges of the base (e.g., between two opposing edges extending in the CD or MD direction).
In some embodiments, the height of the retaining element, measured perpendicular to the upper surface of the base, is comprised between 3 and 10 times the thickness of the base.
In some embodiments, the base has a thickness, measured perpendicular to the upper surface of the base, comprised between 10 μ ι η and 700 μ ι η, and the height of the retaining element, measured perpendicular to the upper surface of the base, is comprised between 3 times and 10 times the thickness of the base.
In some embodiments, the height of the retaining element is greater than or equal to 35 μm, preferably greater than or equal to 55 μm, even more preferably greater than or equal to 80 μm, and less than or equal to 500 μm, preferably less than or equal to 350 μm, even more preferably less than or equal to 120 μm.
For example, the height of the retaining element may be comprised between 80 μm and 350 μm, or between 55 μm and 120 μm.
In some embodiments, wherein the diameter of the inscribed retention element (perpendicular to the retention element when viewed from above) is greater than or equal to 80 μm, preferably greater than or equal to 250 μm, and less than or equal to 500 μm, preferably less than or equal to 450 μm.
In some embodiments, the minimum distance between two holding elements is comprised between 0.1mm and 10 mm.
In some embodiments, the density of the retaining elements of the pattern is greater than or equal to 20 retaining elements per square centimeter, preferably greater than or equal to 50 retaining elements per square centimeter, even more preferably greater than or equal to 100 retaining elements per square centimeter, and less than or equal to 250 retaining elements per square centimeter, preferably less than or equal to 200 retaining elements per square centimeter, even more preferably less than or equal to 150 retaining elements per square centimeter.
The present disclosure also relates to a belt for a holding device as defined above, intended to be cut into a plurality of holding devices.
Drawings
Further features and advantages of the object of the present disclosure will emerge from the following description of an embodiment, given by way of non-limiting example, with reference to the accompanying drawings, in which:
figures 1A-1O are schematic views of holding devices with different patterns according to the present disclosure;
FIG. 2 is a section view along section II-II of FIG. 1A;
figure 3 is a schematic view of an example of an apparatus for producing a holding device;
figures 4 and 5 are schematic views of an example of an apparatus for producing a holding device comprising a woven or nonwoven web;
figure 6 is a schematic top view of a portion of a belt for holding devices;
figure 7 is a schematic top view of another belt for holding devices;
FIG. 8 is a partial enlarged view of the pattern of FIG. 1C;
figure 9 is a view of a holding device comprising a coloured coating;
FIGS. 10 to 14 are graphs showing the peel force in Newton of the pattern 1K-1O as a function of the opening stroke in millimetres, respectively;
fig. 15 and 16 are schematic views of an apparatus for measuring the peel force.
Common elements are identified by the same reference numerals throughout the drawings.
Detailed Description
Fig. 1A schematically shows a holding
In the embodiment of fig. 1A, the holding
Hereinafter, elements common to the respective embodiments are identified by the same reference numerals.
Similarly, fig. 1B-1O illustrate other embodiments of the retaining
As can be seen in fig. 1A-1B, the
It will be noted that in fig. 1G, no
As shown in fig. 3, the retaining
The holding
The
The assembly formed by the
The illustrated example including two
The illustrated
The
More specifically, the
The molded
Each
In the embodiment shown, the
The portions of the
The portion of
The portion of the
The portion of the
In the example shown in the figures, the portion of the
The molded
The molded
A
Where injection of molding material is performed without the
The use of a
The use of a molded
In addition, the production of the molded web is greatly simplified compared to the production of rolls comprising molding cavities. In fact, such rollers are generally produced by stacking successive sheets, thus requiring a plurality of machining operations, and result in great (significant) constraints during assembly and each time the hook reference is changed, and have great masses, requiring maintenance on both ends of the rollers, which consequently complicates their replacement.
The
In fig. 3, the reference sign C indicates the separation between the
In the example shown, the
The apparatus and associated methods shown above may also have means and steps for associating the nonwoven (or woven)
This association of the
In order to fix the web 22 (e.g. nonwoven) to the
Fig. 4 and 5 schematically show examples of
The apparatus shown is similar to that previously shown with reference to figure 3; therefore, common elements will not be described here.
As can be seen in fig. 4 and 5, the illustrated apparatus includes a web drive 112 (here made up of two
The
In the examples shown in fig. 4 and 5, the web is represented as a layer of nonwoven material.
The
The
More specifically, the
As long as such application is performed prior to curing of the
By way of example, by considering a base 12 made of polypropylene, the application of the substrate to abut against the
The
The bonding between the
Where the
Where the
In the case where the
Where the
This way of fixing the
This manner of securing the substrate to the tape may be applied to the tape forming method described above, or more generally to any other tape forming method that includes retaining elements such as hooks.
Fig. 6 schematically shows a portion of the
The
Fig. 7 shows the
Fig. 7 schematically shows a
For the
The retaining
It will be noted that fig. 7 is not to scale. In practice, the distance D between the edge 26A and the first retaining
It will be noted that, within the meaning of the present disclosure, on the left side of fig. 7, the holding
The retaining
In fig. 8, only a few circles are shown on the left side of the figure.
It should be understood that the molded
It should be understood that this type of holding
By way of non-limiting example, the material injected by the
The dye may be, for example, a white dye, such as may relate to the reference 50PP sold by cabat, loaded with 50% by mass of TiO2. As another dye, mention may also be made of the violet dye under reference UN55206 manufactured by COLOR SERVICE. These examples are given as non-limiting examples.
In all the examples described, the density of the retaining
The height H of the retaining element may be greater than or equal to 35 μm, preferably greater than or equal to 55 μm, even more preferably greater than or equal to 80 μm, and less than or equal to 500 μm, preferably less than or equal to 350 μm, even more preferably less than or equal to 120 μm.
For example, the height H of the retaining element may be comprised between 80 μm and 350 μm, or between 55 μm and 120 μm.
The diameter of the holding element (perpendicular to the holding element when viewed from above) is greater than or equal to 80 μm, preferably greater than or equal to 250 μm, and less than or equal to 500 μm, preferably less than or equal to 450 μm.
Example 1: it is possible to inject polypropylene and a white dye sold by CABOT under the reference number 50PP (loaded with 50% by mass of TiO)2) A mixture of (a). The injected mixture may include 99.2% by mass of polypropylene and 0.8% by mass of a white dye.
Example 2: polypropylene can be injected, a violet dye of reference UN55206 made by COLOR SERVICE, and a white dye of reference 50PP sold by CABOT (loaded with 50% by mass of TiO)2) A mixture of (a). The injected mixture may include 99.2% by mass of polypropylene, 0.4% by mass of white dye, and 0.4% by mass of violet dye.
Example 3: example 3 represents the same composition as example 1 and includes a colored coating deposited on the retaining
Example 4: example 4 represents the same composition as example 2 and includes a colored coating deposited on the retaining
In the CIE L a b space, the parameters L, a and b are measured for the
For example 1, the color difference Δ E is equal to 1.606; for example 2, the color difference Δ E is equal to 5.493; for example 3, the color difference Δ E is equal to 7.352, and for example 4, the color difference Δ E is equal to 7.911.
It will be appreciated that the colour difference is present on the retaining means as long as the
In the CIE XYZ color space, the difference in opacity between the
The opacity difference between the
For example 1, the opacity difference is equal to 0.45; for example 2, the opacity difference is equal to 3.67; for example 3, the opacity difference is equal to 1.87, and for example 4, the opacity difference is equal to 12.00.
As can be observed, the opacity difference allows to improve the perception (degree) of the color difference Δ E perceived by the user. Indeed, for example 1, the color difference Δ E is greater than 1, the user can see the difference between the
The
The
The
It will be noted that the
For the patterns 1K to 10, fig. 10 to 14 respectively show the peel curves obtained with the "180 ° peel" method by using the application area 30 of reference number "SoftLoop Premium by APLIX" sold by APLIX, which includes a loop nonwoven of the carded thermal bond type and an SMS nonwoven assembled by thermal calendering.
The peel curve represents the peel force in N (ordinate) as a function of the opening stroke in millimeters (abscissa). The curves shown in fig. 10 to 14 are the average values of 20 measurements on different samples. The peel direction was parallel to the CD direction for all of the tested holding devices.
The
Fig. 15 shows a strip 32 comprising holding
The assembly is then set in a tensile tester 210 comprising 100N measurement units. The end 32a of the strip 32 (i.e., the end opposite the lower portion 32 b) is inserted into the upper jaw 212. The reading of the force cell is set to zero. The cut end 30a (i.e., the side opposite the uncut side 30 b) of the sample from the application area 30 is inserted into the mandible 214 and a slight tension is created. The force must be comprised between 0.02N and 0.05N. During installation, the jaws 212, 214 are spaced 50mm from each other. The assembly is centered between the two jaws 212, 214. The test was performed with a constant movement at a speed of 305mm/min (millimeters per minute) with a test stroke of 50 mm. The test stroke is adjusted according to the width of the holding device to be tested to allow a complete separation of the holding device and the application area.
As can be observed in fig. 10 to 14, the peeling curve has successive peaks P1-P4, each having a maximum value greater than that of the peak preceding it in the direction of the opening stroke (i.e. between two successive peaks taken two by two), the maximum value of the peak with the largest abscissa being greater than that of the peak with the smallest abscissa, and vice versa, the maximum value of the peak with the smallest abscissa being less than that of the peak with the largest abscissa. Thus, in fig. 10, the maximum value of the peak P1 is smaller than the maximum value of the peak P2; the maximum of peak P2 is less than the maximum of peak P3; the maximum value of the peak P3 is smaller than the maximum value of the peak P4. It will also be noted that the minimum of the valleys V1-V3 is less than 50% of the maximum of the peel force (that is, the maximum of the peak P4).
The same is true for the patterns in fig. 1L-1N.
The peaks and valleys each have a point and a base, which may preferably be greater than 1mm wide, more particularly greater than 2mm wide, and in some cases greater than 3mm wide.
Since the peel force has at least two consecutive peaks separated by a valley, the peak value of the peel force increases with the opening stroke, and the user feels this increased force required to separate the holding means from the application area. Therefore, he perceives that the holding device is well maintained on the application area. Furthermore, the maximum value of the peeling force is such that the retaining device does not detach from the application area in an undesired manner.
It can be observed that for the graph in fig. 1O, the minimum value of the trough V2 is greater than 50% of the maximum value of the peak P3. It can also be observed that the different peaks P1-P3 are not marked as identifiable as on the other curves (fig. 10-13). This is particularly relevant in relation to the width L of the
It will be appreciated that the peel curve also depends on the nature of the application zone 30. However, although the value of the peel force may vary depending on the application region, an application region different from that of the reference number "SoftLoop Premium by APLIX" sold by APLIX will give a peel curve with a similar profile.
It will be appreciated that the peeling curve is independent of the color and/or color difference Δ E between the
However, these two features may be combined to improve the actual feel/quality and/or the feel/quality perceived by the user when the user uses the holding device in a closed and/or open manner.
Although the present disclosure has been described with reference to specific exemplary embodiments, it will be evident that various modifications and changes may be made to these examples without departing from the general scope of the invention as defined by the claims. Furthermore, various features of the various embodiments mentioned may be combined in further embodiments. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
The present disclosure may find application in the fields of hygiene, diapers, adult incontinence, packaging industry (e.g. food packaging), ostomy (ostomy), buildings, etc.
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