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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 the problems of quality reduction of release sheet for process, uneven gloss of roller, damage, etc.

Active Publication Date: 2007-08-22
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

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  • Stripping sheet for process and method for fabricating same

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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 with high gloss, a marking film, or the like. 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 smooth...

Embodiment 1

[0054] Using a T-die extruder, 4-methyl-1-pentene-based resin [trade name: DX820, manufactured by Mitsui Chemicals Co., Ltd.] was extruded, and a support [Mitsubishi Paper Co., Ltd. printing paper base paper] was extruded. , Ping weight: 170 grams / square meter, smoothness: surface side 510 seconds, inner side 420 seconds] to form a peeling layer on the surface side, the extrusion temperature is about 300 ℃, 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., thickness 38 μm, structure: polyester resin layer without filler and polyester resin layer with filler The double-layer structure, the maximum surface roughness Rt of the polyester resin side without filler: 0.100 μm] The side of the polyester resin side without filler is laminated on the release layer, passing between the pressing roller and the cooling roller , to obtain a release sheet for...

Embodiment 2

[0056] In addition to the release film, the polyester film [trade name: RC06, thickness: 38 μm, structure: a double-layer structure of a polyester resin layer without filler and a polyester resin layer with filler, Except for the maximum surface roughness Rt of the polyester resin surface without filler: 0.070 μm], it was the same as in Example 1, and a process release sheet was produced.

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Abstract

The present invention provides a process release sheet that can be used repeatedly in processes for producing beautiful synthetic leather or marking films with high gloss, and a method for producing the same. The process release sheet of the present invention has a release layer formed by extruding a thermoplastic resin onto at least one surface of a support, and characterized in that the smoothness of both surfaces of the support (JAPAN TAPPI Pulp test method, Wang Yan type smoothness) was 100 seconds or more, and the glossiness of the peeling layer (JIS Z8741, 75-degree specular gloss) was 80% or more. The method for preparing a process release sheet of the present invention is used to prepare a process release sheet having a release layer formed by extruding a thermoplastic resin onto at least one surface of a support, characterized in that the release layer is During extrusion coating, a release film having a surface with a maximum surface roughness Rt (JIS B0601) of 0.250 μm or less was closely adhered to the release layer formed on the support, and cooled by a cooling roller in the tightly adhered 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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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
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