阅读说明：本技术 聚氨酯树脂在纺织品上的旋转筛网图案印花 (rotary screen pattern printing of polyurethane resins on textiles ) 是由 D.M.布朗 D.G.道森 J.A.雅各布斯 C.E.格林 T.G.希尔 于 2018-01-17 设计创作，主要内容包括：一种PU印花方法和系统包括纺织品部件；以及旋转筛网装置部件。更具体地说,系统可包括：PU材料源；旋转筛网,其含有刮板刀片或磁性辊,所述刮板刀片或磁性辊连接到所述PU材料源；用以携带纺织品接近所述旋转筛网并就位以接受印花的机构；以及水动或磁性压力源,其用以迫使PU穿过所述旋转筛网并且到所述纺织品上。(A PU printing method and system includes a textile component; and a rotating screen device member. More specifically, the system may include: a source of PU material; a rotating screen containing scraper blades or magnetic rollers connected to the source of PU material; means for carrying the textile adjacent said rotating screen and in position to receive printing; and a hydrodynamic or magnetic pressure source to force PU through the rotating screen and onto the textile.)

1. A rotary screen printing system, comprising:

A printed material part, wherein the printed material part comprises a source of polyurethane-containing paste;

A textile component comprising a layer of textile material;

And a rotary screen assembly operatively connected to the printed material assembly and the textile assembly, wherein the rotary screen assembly comprises:

A rotating screen that is a cylinder having openings defining open spaces along a surface of the cylinder, the open spaces corresponding to a predetermined printed pattern, the textile component being adapted to receive the predetermined printed pattern, and the cylinder containing a squeegee blade or magnetic roller operatively connected to the source of polyurethane-containing slurry;

a conveying mechanism to convey the textile component adjacent to the rotating screen;

A pressure source component having a hydrodynamic or magnetic pressure source cooperating with the squeegee blade or the magnetic roll to force an effective amount of the polyurethane-containing slurry through the rotating screen and onto the textile component to form a polyurethane-based print having the predetermined print pattern; and

A drying member operatively connected to the rotating screen member, the drying member being adapted to set the polyurethane-based print.

2. The rotary screen printing system of claim 1, wherein the textile layer is a flat-faced, pile-faced, knitted or woven felt.

3. The rotary screen printing system of claim 2, wherein the textile layer has a top surface and a lower surface, and wherein the textile layer comprises a coating adapted to accept the polyurethane-based printing only on the top surface of the textile layer.

4. the rotary screen printing system of claim 3, wherein the coating comprises a fluorocarbon compound.

5. The rotary screen printing system of claim 4, wherein the fluorocarbon mixture includes an amount of fluorocarbon that constitutes about 1% to about 12% of the fluorocarbon mixture.

6. The rotary screen printing system of claim 3, wherein the coating is a non-fluorinated water repellent mixture, or a wax emulsion.

7. The rotary screen printing system of claim 1, wherein the cylinder is made of nickel.

8. the rotary screen printing system of claim 7, wherein the nickel is coated with a lacquer.

9. The rotary screen printing system of claim 1, wherein the polyurethane-containing slurry has a viscosity of between about 8000cps and about 19000 cps.

10. The rotary screen printing system of claim 1, wherein the polyurethane-containing slurry includes an amount of pigment-imparting material.

11. the rotary screen printing system of claim 1, wherein the openings are perforations, a series of geometries, a series of cuts, or a combination of perforations, geometries, and cuts.

12. The rotary screen printing system of claim 1, wherein the open space is between about 10% to about 50% of the cylinder.

13. The rotary screen printing system of claim 12, wherein the cylinder has a thickness of between about 100 microns and about 210 microns.

14. the rotary screen printing system of claim 13, wherein the openings are perforations having a hole diameter of between about 80 microns to about 260 microns.

15. The rotary screen printing system of claim 14, wherein the open space is about 40% of the cylinder, wherein the thickness of the cylinder is about 150 microns, and wherein the hole diameter of the perforations is about 200 microns.

16. The rotary screen printing system of claim 1, wherein the cylinder contains between about 10mm and about 40mm magnetic rollers.

17. the rotary screen printing system of claim 16, wherein the surface of the magnetic roller is smooth, textured or knurled.

18. The rotary screen printing system of claim 1, wherein the rotary screen member comprises a series of cylinders oriented parallel to one another.

19. a process for printing a textile layer with a PU material, the process comprising the steps of:

Providing a polyurethane-containing slurry, said polyurethane-containing slurry being suitable for printing on textile materials;

providing a textile material;

Preparing the textile material for printing with the polyurethane paste;

providing a rotary screen printing device, the rotary screen printing device comprising:

A rotating screen which is a cylinder having openings defining open spaces along the surface of the cylinder, the open spaces corresponding to a predetermined printed pattern, the prepared textile material being adapted to receive the predetermined printed pattern, and the cylinder containing a squeegee blade or a magnetic roller operatively connected to the polyurethane-containing slurry;

a conveyor to move the textile component adjacent to the rotating screen and leaving a gap relative to the rotating screen; and

A hydrodynamic or magnetic pressure source component cooperating with the squeegee blade or the magnetic roller to force an effective amount of the polyurethane-containing slurry through the rotating screen and onto the textile material to form a polyurethane-based print having the predetermined print pattern; feeding the prepared textile material into the rotary screen printing apparatus; applying the predetermined print to the textile material with the rotary screen printing device according to a set of device parameters; and

drying the printed textile material according to the set of device parameters.

20. The rotary screen printing method of claim 19, wherein the textile material preparation step comprises applying a coating to the textile material such that the textile material is adapted to bind the polyurethane paste without substantial absorption by the textile material.

21. the rotary screen printing process of claim 19, wherein the set of apparatus parameters comprises a conveyor speed for the conveyor of about 15 meters of textile material per minute and a drying temperature for the drying step of about 125 ℃.

22. the rotary screen printing process of claim 19, wherein the gap is between about 0 to about 4 mm.

Technical Field

the present invention relates generally to rotary screen pattern printing apparatus and methods.

Background

Printing using polyurethane-containing ("PU") materials typically involves printing on paper substrates rather than textile substrates. Furthermore, PU patterns have been achieved by such techniques as hot melt (thermal welding) or thermal transfer, decals, flat panels, and three-dimensional printing. However, rotary screen printing is not commonly used for this purpose.

In this context, "rotary screen printing" is defined as printing achieved by applying a slurry onto a moving web (web) through a permeable screen. As the substrate material is conveyed beneath the screen, the slurry is forced through the screen by magnetic bars or with a knife blade.

Rotary screen printing has a wide range of design capabilities and coloring options, making it a desirable process for many applications, including automotive and apparel. In general, rotary screen printing is a more efficient process for mass production. For example, some transfer processes require two distinct steps: first, bonding the pattern to a transfer sheet, and second, combining the transfer sheet with a substrate to apply the pattern. Similarly, other processes require progressive printing (one section at a time) or additional preparatory steps. In contrast, the rotary screen process allows for continuous printing directly on the substrate material.

these and other problems thus indicate a need for an efficient printing process and resulting products in the field of rotary screen printing, especially in the case of PU-containing materials and textiles.

disclosure of Invention

The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention; its sole purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented later.

The present invention comprises a process for printing a pattern, and in particular for applying a pattern comprising a Polyurethane (PU) material onto a textile material by means of a rotating screen.

in one embodiment of the method of the present invention, the steps of the present invention may comprise the steps of: preparing a textile material; preparing PU resin; providing a rotary screen printing apparatus; feeding a textile material into a rotary screen printing apparatus; and applying a pattern of the PU resin to the textile with a rotary screen printing device according to certain device parameters.

The rotary screen printing apparatus may comprise: a rotating screen having a mesh with openings corresponding to a pattern applied to the textile; a magnetic bar or blade scraper contained within the rotating screen; a movable support to carry the textile web, a source of PU resin connected to the squeegee; and a magnetic or hydrodynamic pressure source below the magnetic bar or blade scraper to force the PU resin through the screen, respectively. In addition, device speed, roller size, screen magnets, magnet pressure, and temperature are parameters that can be varied to achieve desired pattern objectives, including the thickness (height) of the print, the clarity (clarity) of the print, and the tactile nature of the print.

In one embodiment of the system of the present invention, the components of the present invention may comprise: a PU printed material part; a textile component; and a rotating screen device member. More specifically, the system may include: a PU resin or slurry source; a rotating screen containing scraper blades or magnetic rollers connected to a source of PU resin; a mechanism for conveying the textile under the rotating screen and in position to receive the printed pattern; and a source of hydrodynamic or magnetic pressure below and adjacent to the rotating screen.

It is a feature of the present invention to provide a continuous method and system for applying a PU pattern to a textile fabric. Another feature is to provide rotary screen printing methods and systems that provide aesthetic enhancements to textiles, including various colors and designs. Another feature is to provide rotary screen printing methods and systems that enable more efficient mass production of patterned materials.

Further features and advantages thereof will be readily apparent to those skilled in the art, techniques and equipment related to the present invention upon careful reading of the detailed description of the preferred embodiments.

Drawings

in the drawings:

FIG. 1 is a perspective view of a rotary screen printing assembly according to one embodiment of the present invention;

FIG. 2 is a perspective view of a rotary screen member of a rotary screen printing assembly according to one embodiment of the present invention;

FIG. 3 is a schematic view of a rotating screen assembly according to one embodiment of the present invention;

FIG. 4 is a detailed view of a section of a rotating screen member of a rotating screen printing assembly according to one embodiment of the present invention;

FIG. 5 is a perspective view of a rotary screen member for use in a rotary screen printing assembly according to one embodiment of the present invention;

FIG. 6 is a perspective view of a rotating screen assembly according to one embodiment of the present invention;

FIG. 7 is a perspective view of a rotating screen assembly according to one embodiment of the present invention;

FIG. 8 is a perspective view of a squeegee pressure blade member of a rotary screen assembly according to one embodiment of the invention;

FIG. 9 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 10 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 11 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 12 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 13 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 14 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 15 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 16 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 17 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 18 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 19 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 20 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 21 is a perspective view of a pattern design on a textile material formed by a rotating screen assembly according to one embodiment of the present invention;

FIG. 22 is a perspective view of an alternative scraper member in a rotary screen assembly according to one embodiment of the present invention;

FIG. 23 is a perspective view of a single screen printing machine reverse roll assembly according to one embodiment of the present invention; and

FIG. 24 is a schematic view of a rotary screen assembly and a printing process according to one embodiment of the present invention.

Detailed Description

the present invention includes methods, apparatus and systems relating to rotary screen printing of textile fabrics. An alternative embodiment of the present invention and its components are illustrated in fig. 1-24 and described more fully below.

The use of Polyurethane (PU) -containing materials for printing or transferring images, markings or patterns has been mainly carried out on paper substrates and not textiles. In addition, printing processes for these types of materials typically include three-dimensional, hot melt or thermal transfer, decals, and flatbed printing. The invention relates to a printing method and a system for rotary screen printing on textile materials using PU-containing materials.

in general, the present invention may include a method and/or system for printing with an application of PU resin or slurry through a rotating, permeable screen onto a moving web of textile. The permeable screen may comprise a hollow, perforated, metal cylinder through which the PU material is forced, such as with a magnetic rod or blade scraper contained within the cylinder. Adjacent to or below the cylinder may be a source of pressure, such as water or magnetic pressure, which is applied to force the PU material through the perforations as the textile layer is conveyed under the cylinder as it rotates. In the case of a blade scraper, hydrodynamic pressure may be applied to the blade to urge the blade in the direction of the moving web. In the case of a magnet roll, magnetic force may be applied to the roll to pull in the direction of the moving web.

In one exemplary embodiment illustrated in fig. 1, an example of a rotary printing system and assembly 10 of the present invention is shown that may include the following components: a PU resin or paste component; a rotating screen member; a movable web member; and a pressure member. For example, as in fig. 1, rotary printing apparatus and system 10 may include: a PU resin or slurry source 12; a rotating screen 14 containing scraper blades (shown) or magnetic rollers 16 connectable to the PU resin source 12; a mechanism to convey the textile sheet or web under the rotating screen 14 and in position to receive the printed pattern 22; and a source of hydrodynamic or magnetic pressure 24 below the rotating screen 14 and adjacent to the rotating screen 14. In one embodiment, the PU slurry 26 is pumped from the PU resin source 12 through a connecting tube 28 into a squeegee or magnet roll 16, an example of which is shown in fig. 2.

for each system component, the present invention contemplates alternative embodiments to achieve specific printing. For example, in one embodiment, the PU slurry may be a water-based slurry having a viscosity and rheology suitable for passing through the rotating screen 14 and for efficient transfer onto the textile surface. In yet another embodiment, the PU paste may include pigment colorants to impart color to a predetermined or desired print. In yet another embodiment, the PU slurry may be fluff based (puff based) to impart a printed dimensional appearance. In one particular example, the PU slurry may have a viscosity in a range of about 8,000cps (centipoise) to about 19,000 cps. In this example, the viscosity is measured by a Brookfield viscometer at 20rpm with a #6 spindle. In addition, the level of PU slurry used will vary depending on the size of the pattern and/or design in question.

the textile components may also vary. In one embodiment, the textile component may comprise a flat surface (flat) bearing a coating, or a pile/knit, or a woven textile, with a PU pattern applied over the coating. In one example, the coating of the textile may allow the PU material to be disposed and adhered to the surface of the textile, including the top or upper surface of the textile, without significant absorption by the textile, including absorption into the substrate or lower surface of the textile. In one embodiment, the textile coating can include an amount of fluorocarbon compound. In another embodiment, the fluorocarbon may comprise from about 1% to about 12% of the coating mixture. In yet another embodiment, the coating means may comprise a wax emulsion or a non-fluorinated water repellent.

The rotary screen member may vary depending on the printed pattern and textile in question. In one embodiment, the rotating screen 14 may be a metal cylinder having a mesh with perforations 15, such as shown in fig. 4-5. The circumference and width of the cylinder may be adapted to emboss a predetermined design or pattern 22. Further, the surface of the screen 14 may be cut, such as by a laser, to include openings 15 corresponding to a predetermined design or pattern 22. Examples of various designs and patterns 22 contemplated are shown in fig. 9-21. These indicate that a wide variety of shapes and patterns may be implemented with the present invention, and still other shapes and patterns are contemplated and not shown, depending on the variations to the components and parameters described.

the screen may be made of a metal such as nickel. The strength or stiffness of the metal may vary depending on the type of textile and/or printing in question. Furthermore, the screen 14 may comprise a coating, such as a lacquer coating, the thickness of which may vary depending on the print to be achieved.

Generally, the size of the mesh openings in the screen can affect what additional amount of PU slurry is needed to achieve the fineness (sharpness) of the pattern 22 and the printed pattern 22. The lacquer coating used can also generally affect the life and clarity of the print.

In one example, the rotating screen 14 mesh may be about 80 mesh (M), sometimes referred to as SP (units for holes per square centimeter), with about 40% or open (perforation or cut) ratio, about 150 microns thick and having a hole diameter of about 201 microns. Other examples include a rotating screen 14 mesh in the range of about 60 to about 140 mesh, having an open area (open area) between about 10% to about 50%, a screen thickness between about 100 microns to about 210 microns, and having a perforation hole diameter between about 80 to about 260 microns.

In another embodiment, printing is accomplished by one or more adjacent screens (shown in fig. 6-7), including a series of screens 30, which can work in tandem to complete the printed design or pattern 22. For example, if the printed pattern 22 includes multiple colors, the use of multiple screens 30 may be used such that each screen in the series 30 may be responsible for imparting a certain or different color into the multi-colored pattern. Alternatively, if the printed pattern includes different design shapes, such as lines and dots, it is also possible to impart these different shapes using more than one screen. In the case of more complex patterns, the rotary printing parameters include the speed of rotation of the screen, and the positioning of the screen may be adapted to be in synchronous registration. Similarly, the pattern size and repetition can be adjusted along with the size of the screen.

Other alternatives are contemplated with respect to the type and length of the flights or blades inside the screen member 14 that are used to deliver the PU slurry 26. When a magnet roll scraper is used, the roll size and magnet pressure can be adjusted according to the desired print or design 22. For example, as shown in FIG. 3, a plurality of sizes of the magnet roll 16 may be used to determine the amount of PU paste added and the fineness of the printing. In general, smaller rolls will additionally provide finer print with lower size, while larger rolls will have the opposite effect. In one embodiment of the invention, the magnet roller bar size may be between about 10mm and about 40 mm. In another embodiment, the magnet roller bar 16 may be 10mm, 15mm, 20mm, or 30 mm.

The surface of the magnet roller can vary from smooth to textured or knurled. Smoother surfaces may be better for clear printing, while cross-grained (cos-textured) or textured surfaces are better when larger amounts of PU paste are used, as may be desired for certain printing.

in another embodiment, the rotating screen member 14 may be a scraper, which is a knife scraper, such as the example shown in fig. 8. As illustrated, the blade squeegee includes a blade 32 adjacent to a squeegee 34 that forces the PU slurry through the screen. Generally, the length of the blade 32 helps determine the additional amount of PU slurry and the fineness of the printing. A short blade may result in finer printing and lower add-on, and a longer blade may result in a softer printing and higher add-on that is less fine.

Further, the squeegee pressure can be adjusted depending on the amount of PU paste required and the print definition required. For a blade flight, the blade 32 bends relative to the flight 34 with increasing pressure. Alternatively, the roller size and magnet strength of the magnet roller may be adjusted for similar results. In general, the higher the squeegee pressure, the higher the PU paste add-on and the lower the print definition, and the lower the squeegee pressure, the lower the add-on and the higher the print definition. In one embodiment, the roll-blade pressure can range between about 30% to about 80%.

the present invention contemplates further alternatives to the squeegee member. For example, the discussed squeegee may be used in conjunction with a continuous strip 36 carrying a textile layer 40 (fig. 22, left side), or alternatively with a counter roll 38, such that the textile layer 40 is transferred between the magnetic squeegee roll/blade 16 and the counter roll 38 during printing as shown on the right side in fig. 22.

In addition to the aforementioned components, the present invention contemplates a drying component 50 (fig. 24) that is used after transfer of the PU slurry onto the textile, the parameters of which may vary. Such parameters as fan speed and temperature may determine the effectiveness and durability of the predetermined decal 22. The temperature used may also be suitable for achieving a predetermined print. In one embodiment, the temperature of dryer section 50 may be between about 130 ℃ and about 180 ℃. In another embodiment, the drying temperature may be about 145 ℃.

In addition to alternatives between each component that contribute to the certain desired printing 22, process parameters and/or how the components are combined to achieve the printing may also vary. These features work in concert to achieve a predetermined print.

In one embodiment, the web speed may be adapted to allow the textile layer 40 to pass under the rotating screen 14 and receive an effective amount of PU slurry 26 to form the predetermined print 22 without substantial deviation. As used herein, "deviations" refers to any undesirable attributes of having a print, including but not limited to, inconsistent thickness, line breaks, stains, and other surface deviations from the predetermined design or pattern 22. In one embodiment, the web speed for textile layer 40 may be between about 15 meters/minute to about 35 meters/minute. In another embodiment, the web speed may be about 25 yards/minute.

another process parameter that can be varied is the gap 52 or distance between the printing screen 14 and the textile layer 40, also called printing felt, which is placed on the movable belt. In general, increasing the gap 52 shown in fig. 3 can result in an increased volume of PU slurry being transferred onto the textile surface. In one embodiment, the gap setting (distance between screen and strip) may be between about 0 to about 4 mm.

furthermore, the surface tension of the textile layer 40 as it is conveyed under the rotating screen 14 may be important to achieve the desired print 22. For example, a roller (fig. 24) may be used in conjunction with a movable belt to maintain the textile, printing blanket under tension. Furthermore, the strip used to carry the textile may include an adhesive layer to maintain the printing blanket in place during printing. For example, a transport mechanism such as a movable belt may include a thermoplastic layer activated by heat. In one embodiment, textile layer 40 first passes over a heating element or plate prior to contact with the moving strip in order to activate the thermoplastic layer of the strip.

In addition to providing a system for printing PU-containing material onto textile material, the present invention further contemplates a method for printing. In one embodiment, the method of the invention comprises the steps of: providing a textile layer; providing a PU material; providing a rotary screen printing assembly; and transferring the PU material onto the textile layer according to a predetermined pattern using a rotary screen printing assembly.

in another embodiment of the invention, the steps of the method comprise: providing a PU resin; preparing PU slurry suitable for printing; providing a textile material; preparing a textile material for printing with the PU paste; providing a rotary screen printing apparatus; feeding the prepared textile material into a rotary screen printing apparatus; applying a pattern of the PU slurry to the textile with a rotary screen printing apparatus according to certain apparatus parameters; and drying the printed textile material according to certain apparatus parameters.

the rotary screen printing apparatus of one embodiment of the method may comprise: a printing blanket feeder 60; one or more rotating screens 30 having a mesh with openings corresponding to the pattern applied to the textile; a magnetic bar or blade scraper contained within each of the one or more rotating screens; a movable support to carry the textile web, a source of PU slurry connected to the squeegee; a magnetic or hydrodynamic pressure source below the magnetic bar or blade scraper to force the PU slurry through the screen, respectively; and a dryer 50. In addition, device speed, roller size, screen magnets, magnet pressure and temperature are parameters that can be varied to achieve the desired pattern objectives, including the thickness (height) of the print, the clarity of the print, and the tactile nature of the print.

In one exemplary embodiment shown in fig. 24, a rotary screen printing apparatus as described above may further include the following features. In particular, the printing blanket feeder 60 may include a series of moving rollers that cooperate to maintain the textile printing blanket in proper alignment and tension as the blanket is fed to the movable support. The rotary screen printing apparatus may further comprise a hot plate 62, such as one between the feeder 60 and the movable support. The movable support may comprise a layer of thermoplastic material activated by heat. One or more rotating screens, such as a series of screens 30, may be disposed on the movable support. If more than one screen is included, the screens may be spaced apart and parallel to each other. The rotating screens may each contain a scraper member, which may be connected to a source of PU slurry through line 28. The PU slurry may be contained in a container and pumped through line 28 to a squeegee for printing. Below and proximate each blade may be a source of hydrodynamic or magnetic pressure. For example, the apparatus may include a magnet beam 64 (fig. 3) below the movable support. Finally, dryer component 50 may include a drying chamber that houses one or more heating elements.

In another embodiment, the method of the present invention may comprise the following steps and features. The amount of PU resin can be used to form a water-based PU printing paste. In addition, printed felts may be formed by treating a flat face, or a pile/knit, or a woven textile layer with a coating or substance that provides water resistance to the surface of the textile. In particular, the coating or treatment of the textile may allow the PU material to settle and adhere to the surface of the textile without significant absorption by the textile. In one embodiment, the coating comprises a fluorocarbon. Alternatively, the coating may comprise a wax emulsion or a non-fluorinated water repellent substance. The treated printed felt may then be fed through a series of alignment and tension bars and passed over a hot plate. The heated printed blanket may then contact and become releasably adhered to a surface of the movable support, such surface having a thermoplastic material or layer adapted to releasably maintain the printed blanket in place during printing. The printing blanket may then be transferred between the movable support and the rotating screen or series of screens. In one embodiment, the movable support may be a continuous strip. In another embodiment, the movable support may be a counter roll relative to the rotating screen. The PU slurry may then be pumped from the PU container to an application squeegee blade or roller inside the rotating screen as the printing blanket is conveyed under or next to the rotating screen. During this step, magnetic or hydrodynamic pressure between the internal squeegee roller or blade and the source of counter-magnets can be used to force the PU slurry onto the printing blanket as the printing blanket is conveyed under the screen to create the predetermined print. Next, the printing blanket may be conveyed to a dryer, including a press dryer, to cause printing to be present on the textile.

In yet another embodiment, the method of the invention described above may be performed using certain process parameters including web speed, drying temperature, and magnet pressure. In one exemplary embodiment, the process parameters may be as follows:

a printing felt speed of about 15 meters/minute;

dryer temperature of about 125 ℃;

Magnet pressure of about 15%;

The magnet roller is knurled and about 20 mm; and

The gap between the printed side and the rotating screen was about 1.75mm printed side/1.25 mm wet side.

In yet another embodiment, the method of the present invention may further comprise the steps of: if desired, permanently fixing the print to the textile, such as by an additional heating or curing step; modifying the printed textile sheet for a specific purpose, such as cutting the textile according to a predetermined size; and transporting the modified textile for end use and use.

One feature of the present invention is the use of a unique rotating screen in combination with PU print paste preparation and substrate pre-treatment, and process parameters including the setting of the print range. This combination provides the ability to print PUs onto textile materials, which was not previously possible. Furthermore, the mixing of the PU paste according to certain mixing specifications is a critical step to achieve a specific predetermined print.

from the foregoing description of preferred embodiments, it will be appreciated by those skilled in the relevant art that substitutions and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.