阅读说明：本技术 一种低掉屑浆粕复合提花非织造布及其制造方法 (Low-scrap-falling pulp composite jacquard non-woven fabric and manufacturing method thereof ) 是由 谷源明 于 2020-08-28 设计创作，主要内容包括：本发明属于非织造布领域,公开了一种低掉屑浆粕复合提花非织造布及其制造方法。由单独的浆粕纤维层组成或者为由浆粕纤维层与若干个纤维层复合组成；非织造布克重为20～150g/m<Sup>2</Sup>,本发明提供的制造方法制备的非织造布表面具有多维度立体花纹,外观纹路更加清晰灵动,非织造布其光滑的表面是通过纯物理方法得到的,原材料的性能得到了完全的发挥,解决了现有复合非织造布具有厚度薄、手感硬、纹路样式单一、掉屑严重、化学助剂残留等缺陷。非织造布表面具有立体花纹,干态厚度大于0.4mm,吸液率大于500％,掉屑性能小于2g/m<Sup>2</Sup>,可以应用于多种擦拭领域。(The invention belongs to the field of non-woven fabrics, and discloses a low-scrap-falling pulp composite jacquard non-woven fabric and a manufacturing method thereof. The composite fiber layer is composed of a single pulp fiber layer or a composite fiber layer composed of a pulp fiber layer and a plurality of fiber layers; the gram weight of the non-woven fabric is 20-150 g/m 2 The surface of the non-woven fabric prepared by the manufacturing method provided by the invention has multi-dimensional patterns, the appearance lines are clearer and more flexible, the smooth surface of the non-woven fabric is obtained by a pure physical method, the performance of the raw materials is fully exerted, and the defects that the existing composite non-woven fabric has thin thickness, hard hand feeling, single line pattern, serious scrap falling, residual chemical additives and the like are overcome. The surface of the non-woven fabric has three-dimensional patterns, the dry thickness is more than 0.4mm, the liquid absorption rate is more than 500 percent, and the chip dropping performance is less than 2g/m 2 Can be applied to various wiping fields.)

1. The low scrap falling pulp composite jacquard non-woven fabric is characterized by being formed by compounding a plurality of fiber layers, wherein the fiber layers are pulp fiber layers or fiber layers A; the composite fiber layer is composed of a plurality of fiber layers, and specifically comprises the following components: the composite fiber layer is composed of a single pulp fiber layer or a composite fiber layer composed of a pulp fiber layer and a plurality of fiber layers; the gram weight of each fiber layer is 2-150 g/m²。

2. The low-scrap pulp composite jacquard nonwoven fabric according to claim 1, wherein the pulp fiber layer is made of any combination of one or more of wood pulp fibers and cellulose fibers or any combination of one or more of wood pulp fibers and chemical fibers, and the length of the cellulose fibers and the chemical fibers ranges from 3mm to 20 mm;

the fiber layer A is made of any one or combination of more of cellulose fibers and chemical fibers; and the length range of the fiber is more than or equal to 1 mm.

3. The low-scrap pulp composite jacquard non-woven fabric according to claim 2, wherein the fiber layer A is an ultra-short fiber layer or a chopped fiber layer or a continuous filament fiber layer; the ultrashort fiber layer is made of one or more of cotton fiber, hemp fiber, viscose fiber, lyocell fiber, polyester fiber, polypropylene fiber, polyethylene fiber, carbon fiber, stainless steel fiber and the like;

the material of the short fiber layer is one or any combination of a plurality of cotton fibers, hemp fibers, viscose fibers, lyocell fibers, cuprammonium fibers, acetate fibers, polyester fibers, polypropylene fibers, polyethylene fibers, polyamide fibers, polytetrafluoroethylene fibers, carbon fibers, stainless steel fibers and the like;

the material of the continuous filament fiber layer is one or any combination of more of viscose fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber and the like.

4. The low-scrap pulp composite jacquard non-woven fabric according to claim 3, wherein the ultrashort fiber layer is preferably an ultrashort fiber layer made of ultrashort fibers with the fiber length of 1-15 mm;

the chopped fiber layer is preferably a chopped fiber layer which is made of chopped fibers with the fiber length of 20-76 mm;

the continuous filament fiber layer is preferably a continuous filament fiber layer which is made of continuous filament fibers with the fiber length of more than or equal to 100 mm.

5. The low-scrap pulp composite jacquard non-woven fabric of claim 1, wherein the pulp fiber layer accounts for 10-100% of the total gram weight of the non-woven fabric, and the fiber layer A accounts for 0-90% of the total gram weight of the non-woven fabric.

6. The composite jacquard nonwoven fabric with low chip shedding pulp as claimed in claim 1, wherein the single side or double sides of the nonwoven fabric have multi-dimensional patterns, and the patterns comprise various elements such as lines, dots and the like with different angles, lengths, thicknesses and heights and combinations thereof.

7. The method for producing the low-scurf pulp composite jacquard non-woven fabric according to the claims 1 to 6, characterized by comprising the following steps:

s1 preparation of fibrous layer

The gram weight of a single fiber layer is 2-150 g/m²(ii) a The fiber layer with better mechanical strength is obtained by controlling the arrangement direction of the fibers in the fiber layer, and the specific method comprises the following steps:

(1) preparing a pulp fiber layer; the pulp fiber layer is formed in an aqueous medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the forming process, and the angle range between the fibers and the mechanical running direction is 0-360 degrees; an ultrasonic dispersion device is arranged in the arrangement of the pulp flowing device and the suction structure, the frequency is 20 kHz-40 kHz, the speed ratio of the pulp flowing device to the suction structure is 1.5:1, and the angle between fibers and the mechanical running direction is 25-55 degrees;

(2) preparing an ultra-short fiber layer; the ultra-short fiber layer is formed in an aqueous medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the forming process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees; an ultrasonic dispersion device is arranged in the arrangement of the pulp flowing device and the suction structure, the frequency is 20 kHz-40 kHz, the speed ratio of the pulp flowing device to the suction structure is 1.5:1, and the angle between fibers and the mechanical running direction is 25-55 degrees;

(3) preparing a chopped fiber layer; the chopped fiber layer is formed in a mechanical net forming system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the running angle and the running acceleration of a fiber collecting curtain in the forming process, and the angle range of the fibers and the mechanical running direction is 0-180 degrees;

(4) preparing a continuous filament fiber layer; forming a continuous filament fiber layer in an air medium system, controlling the arrangement direction of fibers in the fiber layer by adjusting the cloth swinging angle of a forming head in the forming process, wherein the angle range of the fibers and the mechanical operation direction is 0-90 degrees;

s2 compounding fiber layers

After the fiber layers in the step S1 are prepared, clamping a single layer or a plurality of fiber layers by an anti-static bottom curtain and an anti-sticking flower top curtain according to a combination mode required by non-woven fabrics, inputting the single layer or the plurality of fiber layers into high-speed air-water mixing equipment, and after the fiber layers are further mixed and exhausted, lapping and locking fibers in the fiber layers together so as to realize the compounding of the fiber layers;

s3, three-dimensional pattern distribution and consolidation of composite fiber layer

Distributing the fiber layer compounded in the step S2 to form a pattern with a three-dimensional structure through the action of specific air flow and water flow, wherein the action directions of the air flow and the water flow penetrate from the fiber layer with longer length to the fiber layer with shorter length;

the air flow is controlled by adjusting the speed ratio of the spunlace mechanism, the aperture width-depth ratio of the suction structure, the patterns of the suction structure, the air permeability of the filter medium and the vacuum degree of the suction system, wherein the speed ratio of the spunlace mechanism ranges from 1% to 20%, the aperture width-depth ratio of the suction structure ranges from 0.6 to 2.5, the suction structure is provided with octagonal distributed groove through holes with the width of 1mm to 8mm, the air permeability of the filter medium ranges from 2800 mm/s to 7000mm/s, and the vacuum degree of the suction system ranges from-0.01 MP to-0.05 MP;

the water flow is controlled by adjusting the water flow in unit time, the porosity of the water distribution body and the arrangement number range of the water distribution body, wherein the water flow range in unit time is 16-40 m³The porosity of the water fraction ligands ranges from 6% to 37%, and the arrangement number of the water fraction ligands ranges from 3% to 10;

solidifying and forming the fiber layer with the three-dimensional patterns by the action of water jet, and controlling the pressure range of the water jet to be 30-200 bar in the forming process;

s4, cloth cover decoration.

Performing cloth surface modification on the non-woven fabric obtained after the step S3;

(1) removing disordered hairiness on the surface of the fiber layer to obtain the non-woven fabric with a smooth surface, wherein a pressurizing method or a decrement process can be used;

(2) the pressurizing process is characterized in that an ultrafine water jet penetrating technology is added in the modification process, the pressure range of the ultrafine water jet is controlled to be 10-60 bar, and hairiness on the surface of a fiber layer is planted into the fiber layer and solidified, so that hairiness on the surface of a product is reduced;

(3) the reduction process is characterized in that a singeing process is used in the modification process, hairiness on the surface of the fiber layer is burnt, so that hairiness on the surface of a product is reduced, and the temperature range of the surface of the copper roller is controlled to be 150-280 ℃ in the singeing process.

Technical Field

The invention belongs to the field of non-woven fabrics, and relates to a low-scrap-falling pulp composite jacquard non-woven fabric and a manufacturing method thereof.

Background

Pulp composite nonwoven fabrics are the mainstream products in wiping markets due to excellent moisture absorption, but pulp composite nonwoven fabrics are the main factors influencing chip falling and itching due to the use of short-length wood pulp fibers, and people usually add a binder into the pulp composite nonwoven fabrics or use a high-temperature post-finishing embossing process to overcome the defect, but the adoption of the method has many problems. Although the adhesive has the function of consolidating wood pulp fibers to reduce the chip dropping of products, the adhesive belongs to a chemical cross-linking agent, the products treated by the adhesive are easy to yellow and hard in hand feeling, in addition, the finishing process of the adhesive can cause equipment pollution, chemical auxiliary agent residues also exist in the products, and the use safety can not be ensured. The embossing finishing is to improve the consolidation of wood pulp fibers by using a physical method, but high temperature is needed in the processing process, the temperature range is usually near the melting point temperature of the raw materials of the product, the product after embossing at the high temperature is reduced in thickness, hard in hand feeling and not obvious in improvement of the chip-removing performance of the product. In summary, the pulp composite nonwoven fabric on the market at present has the defects of thin thickness, hard hand feeling, single grain pattern, serious scrap drop, chemical additive residue and the like.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the low chip-shedding pulp composite jacquard non-woven fabric and the manufacturing method thereof, the surface of the non-woven fabric has three-dimensional patterns, and the chip-shedding performance is less than 2g/m²The dry thickness is more than 0.4mm, the liquid absorption rate is more than 500 percent, and the gram weight is 20-150 g/m²Can be applied to various wiping fields.

The above purpose of the invention is realized by the following technical scheme:

a low scrap falling pulp composite jacquard non-woven fabric; the composite fiber is composed of a plurality of fiber layers, wherein the fiber layers are pulp fiber layers or fiber layers A; the composite fiber layer is composed of a plurality of fiber layers, and specifically comprises the following components: the composite fiber layer is composed of a single pulp fiber layer or a composite fiber layer composed of a pulp fiber layer and a plurality of fiber layers; the gram weight of each fiber layer is 2-150 g/m²。

The pulp fiber layer is made of any combination of one or more of wood pulp fibers and cellulose fibers or any combination of one or more of wood pulp fibers and chemical fibers, the length ranges of the cellulose fibers and the chemical fibers are 3-20 mm, the preferable cellulose fibers are made of cotton fibers, hemp fibers, viscose fibers and lyocell fibers, and the chemical fibers are made of polyester fibers, polypropylene fibers, polyethylene fibers, polyamide fibers and multi-component fibers thereof.

The fiber layer A is made of any one or combination of more of cellulose fibers and chemical fibers; and the length range of the fiber is more than or equal to 1 mm;

the fiber layer a may preferably be an ultra-short fiber layer or a chopped fiber layer or a continuous filament fiber layer.

The ultrashort fiber layer is made of one or more of cotton fiber, hemp fiber, viscose fiber, lyocell fiber, polyester fiber, polypropylene fiber, polyethylene fiber, carbon fiber, stainless steel fiber and the like.

The chopped fiber layer is made of one or more of cotton fiber, hemp fiber, viscose fiber, lyocell fiber, cuprammonium fiber, acetate fiber, polyester fiber, polypropylene fiber, polyethylene fiber, polyamide fiber, polytetrafluoroethylene fiber, carbon fiber, stainless steel fiber and the like.

The material of the continuous filament fiber layer is one or any combination of more of viscose fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber and the like.

The ultrashort fiber layer is preferably an ultrashort fiber layer which is made of ultrashort fibers with the fiber length of 1-15 mm.

The chopped fiber layer is preferably a chopped fiber layer which is made of chopped fibers with the fiber length of 20-76 mm.

The continuous filament fiber layer is preferably a continuous filament fiber layer which is made of continuous filament fibers with the fiber length of more than or equal to 100 mm.

The gram weight of the non-woven fabric is 20-150 g/m²Wherein the pulp fiber layer accounts for 10-100% of the total gram weight of the non-woven fabric, and the fiber layer A accounts for 0-90% of the total gram weight of the non-woven fabric.

The manufacturing method of the low-scrap-falling pulp composite jacquard non-woven fabric comprises the following steps:

s1 preparation of fibrous layer

The gram weight of a single fiber layer is 2-150 g/m²(ii) a The fiber layer with better mechanical strength is obtained by controlling the arrangement direction of the fibers in the fiber layer, and the specific method comprises the following steps:

(1) preparing a pulp fiber layer; the pulp fiber layer is formed in an aqueous medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flowing device and a suction structure in the forming process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees. Compared with the prior art, the pulp flowing device and the suction structure are arranged in an ultrasonic dispersion device with the frequency of 20 kHz-40 kHz, the fiber uniformity and the fiber distribution direction can be effectively controlled, wherein the frequency of the ultrasonic dispersion device is preferably 25kHz, the speed ratio of the pulp flowing device to the suction structure is 1.5:1, the angle between the fiber and the mechanical operation direction is 25-55 degrees, and the strength of the obtained pulp fiber layer is better.

(2) Preparing an ultra-short fiber layer; the ultra-short fiber layer is formed in an aqueous medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the forming process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees. Compared with the prior art, the ultrasonic dispersion device is arranged in the arrangement of the pulp flowing device and the suction structure, the frequency is 20-40 kHz, the fiber uniformity and the fiber distribution direction can be effectively controlled, wherein the frequency of the ultrasonic dispersion device is preferably 25kHz, the speed ratio of the pulp flowing device to the suction structure is 1.5:1, the angle between the fiber and the mechanical operation direction is 25-55 degrees, and the strength of the obtained ultrashort fiber layer is better.

(3) Preparing a chopped fiber layer; the chopped fiber layer is formed in a mechanical net forming system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the running angle and the running acceleration of a fiber collecting curtain in the forming process, and the angle range of the fibers and the mechanical running direction is 0-180 degrees. Different from the prior art, the operation angle of the collecting curtain is controlled by adjusting a plurality of groups of air bag devices arranged on a collecting curtain carrier roller, and when the air bag pressure is 0bar, the angle between the fiber and the mechanical operation direction is 0 degree; when the pressure of the air bag is 8bar, the angle between the fiber and the running direction of the machine is 180 degrees. When the preferable air bag pressure is 2bar, the angle between the fiber and the mechanical running direction is 30-50 degrees, and the strength of the obtained chopped fiber layer is good.

(4) Preparing a continuous filament fiber layer; the continuous filament fiber layer is formed in an air medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the cloth swinging angle of a forming head in the forming process, and the angle range of the fibers and the mechanical running direction is 0-90 degrees.

S2 compounding fiber layers

After the fiber layers in the step S1 are prepared, according to a combination mode required by the non-woven fabric, a single layer or a plurality of fiber layers are clamped and input into high-speed air and water mixing equipment through an anti-static bottom curtain and an anti-sticking flower top curtain, after the fiber layers are further mixed and exhausted, fibers in the fiber layers are overlapped and clasped together, and therefore the fiber layers are compounded.

S3, three-dimensional pattern distribution and consolidation of composite fiber layer

The fiber layer compounded in the step S2 is distributed to form a pattern with a three-dimensional structure through the action of specific air flow and water flow, the action direction of the air flow and the water flow penetrates from the fiber layer with longer length to the fiber layer with shorter length, the fiber layer distribution mode in the specific direction can effectively reduce the loss rate of short fibers, the loss rate of the fibers is reduced to within 7 percent, the chip falling performance of the product can be improved, and the chip falling performance of the product is less than 2g/m²The three-dimensional patterns of the fibers in the fiber layer are distributed under the action of air flow, so that the fluffiness is better, and the thickness of the product is larger than 0.4 mm.

The air flow is controlled by adjusting the speed ratio of the spunlace mechanism, the aperture width-depth ratio of the suction structure, the patterns of the suction structure, the air permeability of the filter medium and the vacuum degree of the suction system, wherein the speed ratio of the spunlace mechanism ranges from 1% to 20%, the aperture width-depth ratio of the suction structure ranges from 0.6 to 2.5, the suction structure is provided with octagonal distributed groove through holes with the width of 1mm to 8mm, the air permeability of the filter medium ranges from 2800 mm/s to 7000mm/s, and the vacuum degree of the suction system ranges from-0.01 MP to-0.05 MP.

The water flow is controlled by adjusting the water flow in unit time, the porosity of the water distribution body and the arrangement number range of the water distribution body, wherein the water flow range in unit time is 16-40 m³The porosity of the water fraction ligands ranges from 6% to 37%, and the arrangement number of the water fraction ligands ranges from 3% to 10.

And solidifying and forming the fiber layer with the three-dimensional patterns by the action of water jet, and controlling the pressure range of the water jet to be 30-200 bar in the forming process.

S4, cloth cover decoration.

Performing cloth surface modification on the non-woven fabric obtained after the step S3;

(1) the random hairiness on the surface of the fiber layer is removed, so that the non-woven fabric with a smooth surface is obtained, and a pressurization method or a decrement process can be used.

(2) The pressurizing process is characterized in that an ultrafine water jet penetrating technology is added in the modification process, the pressure range of the ultrafine water jet is controlled to be 10-60 bar, and hairiness on the surface of the fiber layer is planted into the fiber layer and solidified, so that hairiness on the surface of a product is reduced.

(3) The reduction process is characterized in that a singeing process is used in the modification process, hairiness on the surface of the fiber layer is burnt, so that hairiness on the surface of a product is reduced, and the temperature range of the surface of the copper roller is controlled to be 150-280 ℃ in the singeing process.

The mechanical strength of the low-scrap-falling pulp composite jacquard non-woven fabric prepared by the method is controlled by adjusting the arrangement direction of fibers in a fiber layer, and the adjustable range of the included angle between the fibers and the mechanical running direction is 0-360 degrees.

The single side or double sides of the low chip-shedding pulp composite jacquard non-woven fabric are provided with multi-dimensional patterns, and the patterns comprise various elements such as lines, dots and the like with different angles, lengths, thicknesses and heights and the combination of the elements.

Compared with the prior art, the invention has the beneficial effects that:

the low-chip-drop pulp composite jacquard non-woven fabric provided by the invention meets the increasing requirements of customers on the safety and novelty of spunlace non-woven fabric products, and can be used in the fields of personal care products such as personal cleaning wet tissues, disinfection wet tissues and other nursing wet tissues, household wiping products such as household cleaning and floor wiping towels, dry towel wiping such as beauty towels and cotton soft towels and the like.

Compared with the existing products in the market, the surface of the non-woven fabric prepared by the manufacturing method provided by the invention has multi-dimensional patterns, the appearance lines of the non-woven fabric prepared by the manufacturing method provided by the invention are clearer and more flexible, the smooth surface of the non-woven fabric is obtained by a pure physical method, the performance of the raw materials is fully exerted, and the defects that the existing composite non-woven fabric has thin thickness, hard hand feeling, single line pattern, serious scrap falling, residual chemical additives and the like are overcome.

Drawings

FIG. 1 is a graph showing the effect of a low-lint pulp composite jacquard nonwoven fabric prepared in example 1 of the present invention.

FIG. 2 is a graph showing the effect of a low-lint pulp composite jacquard nonwoven fabric prepared in example 2 of the present invention.

Detailed Description

The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the experimental method can be obtained from commercial sources.