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Mold release sheet and molded articles

A technology for mold release and sheet materials, which is applied to the field of mold release sheets and molded products using the mold release sheets, and can solve problems such as environmental deterioration, operability deterioration, and production decline.

Active Publication Date: 2011-02-09
NAGOYA OIL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in mass production, stopping the molding operation every prescribed number of shots will cause poor operability and a decrease in throughput, and spreading the release agent will cause deterioration of the environment around the operating place, and the release agent If it adheres to the sheet material or the surface of the molded product, it may cause the problem of hindering the required performance and quality of the molded product

Method used

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  • Mold release sheet and molded articles
  • Mold release sheet and molded articles
  • Mold release sheet and molded articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0155] [Releasable sheet]

[0156] (1) Porous sheet (base sheet)

[0157] Use a fiber sheet made of polyester fiber and made by spunlacing (mass per unit area: 40g / m2) 2 , thickness: 0.4mm, ventilation resistance: 0.04kPa·s / m).

[0158] (2) Water-based adhesive

[0159] A mixed solution consisting of 30 parts by mass of Acrodur 958D (trade name, manufactured by BASF Japan Corporation, solid content: 42%) and 70 parts by mass of water was used.

[0160] (3) Manufacture of release sheet

[0161] The release property was obtained by coating and impregnating the above-mentioned water-based adhesive on the above-mentioned porous sheet with a solid content of 5% by mass, and then drying it at 150°C for 4 minutes. Sheet.

[0162] [molding]

[0163] (1) Substrate

[0164] The mass per unit area of ​​the novolac resin type phenolic resin powder using 20% ​​by mass attached to the fiber weight is 800g / m 2 felt raw cotton sheet (thickness: 10mm).

[0165] (2) Manufacture of mold...

Embodiment 2

[0171] Except for changing the following matters in Example 1, it carried out in the same manner, and obtained the molding.

[0172] (1) Porous sheet (base sheet)

[0173] Using creped paper composed of 100% pulp (mass per unit area: 20g / m 2 , Shrinkage rate: 30%, thickness: 0.15mm, ventilation resistance: 0.10kPa·s / m).

[0174] The test results are shown in Table 1.

Embodiment 3

[0176] Except for changing the following matters in Example 1, it carried out in the same manner, and obtained the molding.

[0177] (1) Porous sheet (substrate sheet)

[0178] Using embossed paper composed of 100% pulp (mass per unit area: 20g / m 2 , Protrusion height: 0.2mm, Protrusion number: 120 / m 2 , Ventilation resistance: 0.10kPa·s / m).

[0179] The test results are shown in Table 1.

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Abstract

The invention aims at improving the mold release properties of a molded article. The invention provides a mold release sheet (1) prepared either by coating a porous sheet, a porous sheet having an air permeation resistance of 0.01 to 1.2kPa s / m, or a creped and / or embossed stretch paper with an aqueous binder which comprises (A) a polymer obtained by radial polymerization of an ethylenically unsaturated acid anhydride or an ethylenically unsaturated dicarboxylic acid capable of forming an acid anhydride group from the carboxylic groups and (B) an alkanolamine having at least two hydroxyl groups or by impregnating a paper described above with the aqueous binder. When the mole release sheet (1) is thermoformed in a state laminated with a substrate (2), the aqueous binder contained in the sheet (1) is speedily cured to exert mold release effect.

Description

technical field [0001] The present invention relates to a mold release sheet and a molded article using the mold release sheet, the molded article being suitable for, for example, automotive interior materials and the like. Background technique [0002] Conventionally, molded articles using sheet materials such as fiber sheets or plastic sheets impregnated with thermosetting resins have been widely provided as interior materials for automobiles (for example, Patent Document 1). Such a sheet material is manufactured into a molded article by heat pressing, or vacuum and / or Formed into a predetermined shape by pressure molding to produce a molded product. [0003] However, when the above-mentioned conventional sheet material is molded into a molded product of a predetermined shape, if the sheet material is a fiber sheet, curing of the thermosetting resin as a binder is slow, which poses a problem. That is to say, if the curing of the thermosetting resin is slow, the uncured t...

Claims

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Application Information

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IPC IPC(8): B32B27/30C08J9/36B29C33/68B32B27/00
CPCD21H23/22D21H19/20B29C33/68D21H23/40Y10T428/24455Y10T428/24612Y10T428/249965Y10T428/249962Y10T428/249991
Inventor 小川正则藤井慎水谷直弘
Owner NAGOYA OIL CHEM CO LTD
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