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Method and equipment for producing flexible cloth possessing hot melt adhesive coating layer applied by wire mesh

A technology of hot-melt adhesives and fabrics, applied in adhesives, film/sheet adhesives, printing of special varieties of printed matter, etc., can solve problems such as impossible to obtain a clean screen, excessive tension, etc.

Inactive Publication Date: 2002-08-28
KUFNER TEXTILWERKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since during the transfer of wet paste there is a danger that the extruded screen pattern and residual paste may remain on the interlayer substrate, it is not possible to obtain a clean screen, for example, if the paste is not transferred. Smudges the screen by printing into the voids of the screen, too, excessively causing a sense of tension

Method used

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  • Method and equipment for producing flexible cloth possessing hot melt adhesive coating layer applied by wire mesh
  • Method and equipment for producing flexible cloth possessing hot melt adhesive coating layer applied by wire mesh
  • Method and equipment for producing flexible cloth possessing hot melt adhesive coating layer applied by wire mesh

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Embossing rolls and rubberized back rolls

[0022] - all cooled

[0023] - Embossed groove density: 80 / cm 2

[0024] —Embossed groove depth: 0.27mm

[0025] - Embossing depth: 0.18mm

[0026] Slurry composition

[0027] -PVC plus plasticizer 1:1:10%

[0028] - dry residue, cross-linked polymethacrylate 3.5%

[0029] - dry residue, additive 1%

[0030] - dry residue, thickener 2%

[0031] - excess water

[0032] Slurry viscosity: 15000-25000cP

[0033] Hot melt adhesive powder: low melting copolyamide powder 80-160 m

[0034] Coated substrate: Braid 25g / m with textured polyester yarn 2

[0035] Coating weight: total weight 5.0g / m 2 , of which the protective layer is about 1g / m 2, hot melt adhesive about 4.0g / m 2

[0036] Coating error: + / -0.5g / m 2 (Sample 100cm 2 )

[0037] Adhesive strength (under the conditions of continuous material handling pressure, 127°C, set gap, polyester pullover outer material): better than 13N / 5cm

example 2

[0039] Bottom screen stencil, 150° obtuse external doctor blade and rubberized back roller

[0040] —Stencil hole density: 80 / cm 2

[0041] - Hole diameter: 0.30mm

[0042] - Wall thickness of bottom wire mesh: 0.19mm

[0043] - perforation drain of pores in continuous operation: about 60% of total pore volume (volume = pore cross-sectional area * Wall thickness of bottom wire mesh)

[0044] Slurry composition: same as above

[0045] Slurry viscosity: same as above

[0046] Coating error: same as above

[0047] Hot melt adhesive powder: same as above

[0048] Coated substrate: same as above

[0049] Coating weight: same as above

[0050] Adhesive strength: same as above

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Abstract

The present invention relates to a method and apparatus for producing screen coatings containing hot-melt adhesives on flexible cloth materials such as woven, braided or non-woven fabrics, mainly used in garment processing, by screen embossing the paste forming a protective layer, then powdering with a hot melt adhesive and removing excess powder not adhering to the embossing of the paste, characterized in that the paste is filled into the grooves of an embossing roll or from the outside into the holes of a circular screen stencil, and then almost only this portion of the slurry filler is applied to the cloth and immediately separated from the filler. Afterwards, powdering with the hot-melt adhesive powder, removing excess powder not adhering to the embossing of the paste, and also including a drying and sintering process. The transfer of the slurry from the embossing roll to the coated substrate is accomplished by contact with a backing roll. In the second method, in the process of filling the holes of the screen stencil, the bottom smooth surface on the outside of the stencil is utilized, and the slurry is only filled from the outside without the slurry being pressed through the inside of the screen stencil. An internal doctor blade is provided, without slurry holes, and the slurry is transferred to the coated substrate with the assistance of a rubberized backing roll located below the screen stencil. The resulting double coat of protective layer and hot melt adhesive layer virtually completely covers the surface of the substrate, requiring very few coats while being free from backside seizure and having an even weight distribution. The amount of adhesive required is less and hardly any differences exist, thus reducing costs compared to all coating methods known hitherto, resulting in additional flexibility and good or even enhanced adhesion.

Description

technical field [0001] The present invention relates to a method and apparatus for producing flexible sheeting with a wire mesh applied coating of hot melt adhesive. Cloths with hot melt adhesives are based on woven fabrics, woven fabrics or row woven fabrics mainly used as pads for garment shaping. The coating is a protective layer formed using a slurry, and an imprint is formed by powdering with a hot melt adhesive powder. Excess powder not adhering to the imprint screen was removed by a blower / suction device before the coating was dried and sintered. technical background [0002] For a long time, a screen-coated flexible fabric with a pasty protective layer by powdering a layer of hot melt adhesive has been known, mainly using a circular screen stencil, fed by an internal scraper. The imprint paste was applied with pressure through the holes of the circular screen stencil while being applied to the same locations. During this printing process, especially when the cloth...

Claims

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Application Information

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IPC IPC(8): B41F9/00B05C1/08B05C1/10B05C1/16B05C9/14B05C19/06B05D1/26B05D1/28B05D3/02B05D5/10B41F15/08B41F15/40B41M1/10B41M1/12B41M3/06C09J7/02C09J123/04C09J167/00C09J175/04C09J177/00D06C23/00D06N7/00D06P7/00
CPCB05C1/0813B05C1/10B05C1/16B05D1/28B05D5/10D06N2211/10D06N7/0092D06P7/00
Inventor J·赫菲勒
Owner KUFNER TEXTILWERKE
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