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Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same

A technology of synthetic leather and release paper, applied in papermaking, textiles and papermaking, chemical instruments and methods, etc., can solve the problems of low heat resistance, breakage of release paper, cannot be used repeatedly, etc., and achieve excellent peelability and release. Excellent moldability and workability

Inactive Publication Date: 2009-04-08
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, in the release paper using paper as a support, since the irregularities of the paper fibers also affect the surface of the uncured ionizing radiation curable resin layer, it is difficult to obtain a synthetic leather with a glossy style. question
In addition, when producing synthetic leather, when tension is applied to the release paper in a high-temperature drying oven, the release paper with low heat resistance also has the problem of being broken and cannot be used repeatedly.

Method used

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  • Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same
  • Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same
  • Embossed release paper for production of synthetic leather, support thereof, synthetic leather utilizing the release paper and process for producing the same

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Embodiment

[0148] Next, the present invention will be described in detail by way of examples, but the present invention is not limited by the following examples unless the gist is exceeded.

[0149] 1. Embossed release paper of the first form of the present invention

[0150] (1) Preparation of ionizing radiation curable composition

[0151] The following five ionizing radiation curable compositions were formulated.

[0152] Ionizing radiation curable composition A

[0153] In the reactor equipped with stirrer, reflux condenser, dropping funnel and thermometer, add the trimer of 206.1g ethyl acetate and 133.5g of isophorone diisocyanate (produced by degussa company, VESTANAT, T1890), heat up Dissolve it at 80°C. After blowing air into the solution, add 0.38 g of hydroquinone monomethyl ether, 249.3 g of a mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., Bisucoat 300) and 0.38 g of dibutyltin diacry...

Embodiment 7

[0253] Embodiment 7 (the manufacturing method of the synthetic leather of the first form)

[0254] As a coating solution for forming a skin layer, the following components were mixed and stirred sufficiently with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.

[0255]

[0256] 100 parts by weight of ester polyurethane resin

[0257] (Manufactured by Dainippon Ink Chemical Industry Co., Ltd., Chrisboso NB-637N)

[0258] Colorant 15 parts by weight

[0259] (Manufactured by Dainippon Ink Chemical Industry Co., Ltd., ダイラツクTV-COLOR)

[0260] 20 parts by weight of methyl ethyl ketone

[0261] Dimethylformamide 10 parts by weight

[0262] On the release paper obtained above, the prepared ester-based polyurethane resin was coated with a knife coater to a dry thickness of 20 μm, and dried with hot air at 100° C. for 2 minutes to form a polyurethane skin layer. Next, on the polyurethane skin layer, a two-component curable polyester-bas...

Embodiment 8

[0272] Embodiment 8 (the manufacturing method of the synthetic leather of the second form)

[0273] As a coating solution for forming a skin layer, the following components were mixed and stirred sufficiently with a propeller mixer to prepare a mixture of an ester-based polyurethane resin composition.

[0274]

[0275] 100 parts by weight of ester polyurethane resin

[0276] (Manufactured by Dainippon Ink Chemical Industry Co., Ltd., Chrisboso NB-637N)

[0277] Colorant 15 parts by weight

[0278] (Manufactured by Dainippon Ink Chemical Industry Co., Ltd., ダイラツクTV-COLOR)

[0279] 20 parts by weight of methyl ethyl ketone

[0280] Dimethylformamide 10 parts by weight

[0281] On the release paper obtained above, the prepared ester-based polyurethane solution was coated with a knife coater to a dry thickness of 20 μm, and dried with hot air at 100° C. for 2 minutes to form a polyurethane skin layer.

[0282] Next, a wet-laid synthetic leather middle layer for forming th...

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Abstract

This invention provides an embossed release paper for synthetic leather production, which has embossability, heat resistance and durability and, at the same time, has excellent separability from a two-pack curing type PU adhesive and can be used in all of synthetic leathers such as PU, PVC, and semisynthetic leathers, and a process for producing the same. The embossed release paper for synthetic leather production comprises at least paper as a support and an ionizing radiation cured film provided on the paper. The upper part of the cured film has been embossed. The ionizing radiation cured film has been formed by applying an ionizing radiation to a coating liquid having a specific composition to cure the coating liquid.

Description

technical field [0001] The present invention relates to an embossed release paper for producing synthetic leather, a support thereof, synthetic leather using the release paper, and a method for producing the same. More specifically, it relates to an embossed release paper using an ionizing radiation curable coating material having a specific composition. Background technique [0002] Conventionally, embossed release paper has been used as a craft release paper for synthetic leather. In addition, polyurethane (hereinafter abbreviated as PU), vinyl chloride (hereinafter abbreviated as PVC), combinations of PU and PVC, and the like are known as raw materials of synthetic leather. [0003] As a method of manufacturing PU leather, for example, there is a method of coating a paste-like PU resin for the skin layer on a release paper, drying and curing it at a temperature of 90 to 140°C, and then using a two-component curing type PU After using an adhesive to bond it to the base f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/00B32B27/10B32B27/30B32B27/40D06N3/00D21H27/00C09D4/02C09D5/00C09D183/04C09D201/00
Inventor 藤森尚美世古敏也山田胜彦向井峰夫椎名德之
Owner DAI NIPPON PRINTING CO LTD
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