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Mold release film for ceramic green sheet production

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

Active Publication Date: 2022-01-21
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 60 nm to 800 nm (for example, refer to Patent Documents 5 and 6). The problem of local holes in the surface

Method used

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  • Mold release film for ceramic green sheet production
  • Mold release film for ceramic green sheet production
  • Mold release film for ceramic green sheet production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] 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, the average area surface roughness Sa, the maximum protrusion height Rp, the phase separation structure, and the starting point of peeling when half-cutting the ceramic green sheet.

[0131] (coating liquid 1)

[0132] Compound (I) 100.00 parts by mass of dipentaerythritol hexaacrylate (NK ester (registered trademark) A-DPH, manufactured by Shin-Nakamura Chemical Industry Co., Ltd., hexafunctional acrylate, solid content concentration 100%)

[0133] Resin (II) polyester resin (A) ...

Embodiment 2

[0140] The following coating liquid 2 which changed the polyester resin (B) compared with Example 1 was used. Except for 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, the average area surface roughness Sa, the maximum protrusion height Rp, the phase separation structure, and the starting point of peeling when half-cutting the ceramic green sheet.

[0141] (coating solution 2)

[0142] Compound (I) 100.00 parts by mass of dipentaerythritol hexaacrylate (NK ester (registered trademark) A-DPH, manufactured by Shin-Nakamura Chemical Industry Co., Ltd., hexafunctional acrylate, solid content concentration 100%)

[0143] Resin (II) polyester resin (B) 9.45 parts by mass

[0144] Release agent (III) 1.26 parts by mass (modified polydimethylsiloxane having an acryloyl group, BYK-UV3505 manufactured by BYK Japan KK., solid content concentration 40% by mass)

...

Embodiment 3

[0150] The following coating liquid 3 which changed the polyester resin (II) and diluent solvent compared with Example 1 was used. Except having used the coating liquid 3, 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, the average area surface roughness Sa, the maximum protrusion height Rp, the phase separation structure, and the starting point of peeling when half-cutting the ceramic green sheet.

[0151] (coating solution 3)

[0152] Compound (I) 100.00 parts by mass of dipentaerythritol hexaacrylate (NK ester (registered trademark) A-DPH, manufactured by Shin-Nakamura Chemical Industry Co., Ltd., hexafunctional acrylate, solid content concentration 100%)

[0153] Resin (II) polyester resin (C) 9.45 parts by mass

[0154] Release agent (III) 1.26 parts by mass (modified polydimethylsiloxane having an acryloyl group, BYK-UV3505, manufactured by BYK Japan KK., solid content...

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Abstract

[Problem] To provide a mold release film for ceramic green sheet molding that is excellent in peelability and is less prone to damage such as cracks in the half-cut test of the molded ultra-thin ceramic green sheet. [Solution] A release film for producing ceramic green sheets, comprising a release layer directly laminated on at least one side of a polyester film or a release layer sandwiched between other layers, the release layer being cured by at least containing energy rays Type compound (I), polyester resin (II), and the coating film of release component (III) are cured. Structural units.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/56B28B1/30B32B27/00B32B27/36
CPCB28B1/30B32B27/36B32B27/00C08J7/042C08J5/18C09D5/1681C09D4/06H01G13/00H01G4/30C08J2367/00
Inventor 松尾有加寺田明纪
Owner TOYOBO CO LTD