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Release film for ceramic green sheet production

A ceramic green sheet and mold release film technology, which is applied in the direction of manufacturing tools, ceramic molding machines, fixed capacitor parts, etc., can solve the problem that the rough protrusions cannot be completely eliminated, and the peeling force will not be too strong, and the processability is excellent. Effect

Active Publication Date: 2021-05-11
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the filler is kneaded into PET, the coarse protrusions due to the aggregation of the filler cannot be completely eliminated, which may cause a defect in the product
In particular, in ultra-thin ceramic green sheets, the inorganic filler used as a ceramic material has a particle size of about 60nm to 800nm ​​(Patent Documents 5 and 6). Therefore, when using a film similar to that described in Patent Document 4, there may be problems on the peeling surface. local hole problem

Method used

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  • Release film for ceramic green sheet production
  • Release film for ceramic green sheet production
  • Release film for ceramic green sheet production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Using a reverse gravure coater, coat the coating liquid 1 with the following composition on the surface layer A of the laminated film X1 so that the film thickness of the mold release layer after drying becomes 2.5 μm, and dry it at 90°C for 30 seconds , using a high-pressure mercury lamp, at 200mJ / cm 2 By irradiating with ultraviolet rays, a release film for ultra-thin ceramic green sheet production is obtained. The obtained release film was evaluated for the thickness of the release layer, average area surface roughness Sa, maximum protrusion height Rp, surface irregularities due to phase separation structure, and the starting point of peeling when half-cutting the ceramic green sheet.

[0144] (coating liquid 1)

[0145] Compound (I) 100.00 parts by mass of dipentaerythritol hexaacrylate (NK ESTER (registered trademark) A-DPH manufactured by Shin-Nakamura Chemical Industry Co., Ltd., hydroxyl value 10 mgKOH / g, hexafunctional acrylate, solid content concentration 100...

Embodiment 2

[0151] The following coating liquid 2 in which the hydroxyl value of compound (I) was increased compared with Example 1 was used. Except having used the coating liquid 2, it carried out similarly to Example 1, and obtained the release film. The obtained release film was evaluated for the thickness of the release layer, average area surface roughness Sa, maximum protrusion height Rp, surface irregularities due to phase separation structure, and peeling origin during half-cutting of the ceramic green sheet.

[0152] (coating liquid 2)

[0153] Compound (I) 100.00 parts by mass of dipentaerythritol hexaacrylate (Aronix (registered trademark) M-402 manufactured by Toagosei Co., Ltd., hydroxyl value 30 mgKOH / g, hexafunctional acrylate, solid content concentration 100%)

[0154] Resin (II) 9.45 parts by mass of polyester resin (Byron (registered trademark) RV280 manufactured by Toyobo Co., Ltd., solid content concentration: 100% by mass)

[0155] Release agent (III) 1.26 parts by ...

Embodiment 3

[0159] The following coating liquid 3 which changed resin (II) to polyester urethane resin (Byron (registered trademark) UR1400 by Toyobo Co., Ltd., 30 mass % of solid content concentration) compared with Example 1 was used. Compared with the coating liquid 1 of Example 1, the solid content concentration of the coating liquid 3 was reduced. It applied so that the film thickness of the mold release layer after drying might become 1.3 micrometers. A release film was obtained in the same manner as in Example 1, except that the coating solution 3 was used and the release layer after drying was applied so as to have a film thickness of 1.3 μm. The obtained release film was evaluated for release layer thickness, average area surface roughness Sa, maximum protrusion height Rp, surface irregularities due to phase separation structure, and peeling origin at half-cut ceramic green sheets.

[0160] (coating liquid 3)

[0161] Compound (I) 100.00 parts by mass of dipentaerythritol hexaa...

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Abstract

[Problem] To provide a release film for ceramic green sheet formation, wherein the release film has excellent light peeling properties and damage such as cracks is unlikely to occur in a half-cut test for ultra-thin ceramic green sheets formed therewith. [Solution] A release film for ceramic green sheet production in which a release layer is laminated onto at least one surface of a polyester film either directly or with another layer therebetween, the release layer being formed by curing a coating that includes at least an energy ray-curable compound (I), a polyester resin or polyester urethane resin (II), and a release component (III), and the hydroxyl value of the energy ray-curable compound (I) being no more than 45 mg KOH / g.

Description

technical field [0001] The present invention relates to a release film for producing ultra-thin ceramic green sheets, and more specifically relates to a film capable of suppressing process defects caused by pinholes, uneven thickness, and peeling defects during the production of ultra-thin ceramic green sheets An ultra-thin release film for ceramic green sheet production that suppresses the occurrence of Background technique [0002] Conventionally, a release film with a polyester film as a base material and a release layer laminated thereon has been used for molding ceramic green sheets such as multilayer ceramic capacitors (hereinafter referred to as MLCCs) and ceramic substrates. In recent years, the thickness of ceramic green sheets tends to be thinner along with the miniaturization and increase in capacity of multilayer ceramic capacitors. Ceramic green sheets are molded by coating a slurry containing ceramic components such as barium titanate and a binder resin on a r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/30B32B27/00B32B27/36
CPCB28B1/30B32B27/36B32B27/00C08J7/046C08J5/18C09D5/1681C09D7/65C09D133/06C08L67/00C08L75/06H01G4/12C04B35/01
Inventor 松尾有加寺田明纪
Owner TOYOBO CO LTD