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Stripping sheet for process and method for fabricating same

A technology of release sheet and process, which is applied in the field of release sheet for process and its preparation, and can solve problems such as damage, uneven gloss of rollers, and quality reduction of release sheet for process

Active Publication Date: 2011-12-28
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when producing a release sheet for a process used in this method, the surface of the metal cooling roll may be damaged by foreign substances mixed in the production process, or the movement of the molten resin to the roll surface during the continuous production process Adhesive substances cause uneven gloss or unevenness on the surface of the drum, and the quality of the produced process release sheet will decrease with time
In order to solve this problem, especially in the production of process release sheets used in the process of producing beautiful synthetic leather with high gloss or marking films, etc., the cooling drum is required to have high specularity, however, in this case Cooling drums consume a lot of time and cost in maintenance, repair, inspection, and replacement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Stripping sheet for process and method for fabricating same
  • Stripping sheet for process and method for fabricating same

Examples

Experimental program
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Effect test

preparation example Construction

[0037] In the method for producing a release sheet for a process of the present invention, the release layer formed of the thermoplastic resin has a glossiness (JIS Z8741, 75-degree specular gloss) of 80% or more. When the glossiness is less than 80%, it is impossible to produce a beautiful synthetic leather or marking film with high gloss. Preferably, the glossiness is 90% or more.

[0038] Next, the manufacturing method of the release sheet for technical use of this invention is demonstrated.

[0039] In the preparation method of the technical release sheet of the present invention, the release layer is formed by extruding thermoplastic resin to cover at least one surface of the support. More specifically, the release layer is generally formed by extruding the covering thermoplastic resin through a commonly used co-extrusion molding machine, single extruders in series, or single extruders.

[0040] The smoothness (JAPAN TAPPI pulp test method, Oken type smoothness) of both...

Embodiment 1

[0054] Using a T-die extruder, extrude 4-methyl-1-pentene resin [trade name: DX820, manufactured by Mitsui Chemicals Co., Ltd.] on a support [Mitsubishi Paper Co., Ltd. , Quantity: 170 g / m2, smoothness: 510 seconds on the surface side, 420 seconds on the inner side] to form a peeling layer on the surface side, the extrusion temperature is about 300 ° C, and the thickness of the peeling layer is about 50 microns. At the same time, the release film [trade name: polyester film T-700, manufactured by Mitsubishi Chemical Polyester Co., Ltd., 38 μm thick, structure: polyester resin layer without filler and polyester resin layer with filler The double-layer structure, the maximum surface roughness Rt of the filler-free polyester resin side: 0.100 microns] The filler-free polyester resin side is laminated on the release layer, passing between the pressure roller and the cooling roller , to make a release sheet for the process, and then wind it into a roll. In addition, before the sup...

Embodiment 2

[0056] In addition to changing the release film to a polyester film made by Toray Co., Ltd. [trade name: RC06, thickness: 38 microns, structure: a two-layer structure of a polyester resin layer without a filler and a polyester resin layer with a filler, Except the maximum surface roughness Rt of the polyester resin surface not containing filler: 0.070 μm], the other was the same as in Example 1, and a release sheet for a process was produced.

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Abstract

The invention provides a releasing sheet for processing capable of being repeatedly used in a process of manufacturing beautiful synthesized leathers with high glaze or marked thin films and the like, and a manufacturing method thereof. The releasing sheet for processing according to the invention is provided with a releasing layer which is formed by extruding a thermoplastic resin to cover at least a surface of a supporting body, characterised in that the smoothness (JAPAN TAPPI paper stuff test method, wang yan type smoothness) of two faces of the supporting body is more than 100 seconds, the glossiness (JIS Z8741, 75 degrees mirror glossiness) of the releasing layer is higher than 80%. The manufacturing method of the releasing sheet for processing according to the invention is used for manufacturing the releasing sheet for processing with the releasing layer which is formed by extruding the thermoplastic resin to cover at least a face of the supporting body, characterised in that, the releasing thin film having a face with a maximal surface roughness Rt(JIS B0601) lower than 0.250 micron is tightly attached to the releasing layer formed on the supporting body, and is passed throught a cooling roller under a tightly attached state.

Description

technical field [0001] The present invention relates to a release sheet for art which can be used repeatedly in the process of preparing beautiful synthetic leather or marking film etc. with high gloss and its preparation method. Background technique [0002] In the preparation of synthetic leather or marking films, etc., a release sheet for technology with a release layer made of releasable resin on the surface of the support is generally used. A coating solution with a resin as the main component is applied to the release layer of the process release sheet and dried, and then, if necessary, a base fabric is laminated on the release layer with an adhesive, and then the process release sheet is peeled off and removed . [0003] On the surface of such a synthetic leather or a marking film, etc., glossiness, matting, or pattern printing can be performed as required. A specific method of performing printing, for example, employs a method of performing printing with a technica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/10B32B27/32B32B37/15B32B38/10B32B38/18C08L23/10C08L23/20
CPCB05D1/265B05D3/007B05D3/12B05D5/061B05D2507/00B05D2507/02C08J2323/12C08J2323/20C08J7/0427
Inventor 佐佐木靖谷胁富士雄
Owner LINTEC CORP