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, capacitor manufacturing, ceramic molding machines, etc., can solve the problems of low protrusion density, large protrusions, pinholes, etc., and achieve good coilability and prevent pinholes Effect

Active Publication Date: 2022-05-27
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned prior art has problems in that pinholes and partial thickness unevenness are generated due to the large protrusions.
However, according to the above-mentioned prior art, although the height of the protrusions is reduced, the density of the protrusions is low. Therefore, when the pressure applied to the protrusions is large and the thickness of the ceramic green sheet is further thinned, there is a problem of occurrence of pinholes.

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

[0195] (Preparation of Easy Slip Coating Liquid 1)

[0196] An easy-slip coating liquid 1 having the following composition was prepared.

[0197] (Easy Slip Coating Liquid 1)

[0198]

[0199]

[0200] (Manufacture of polyester film)

[0201] As a film raw material polymer, a PET resin pellet (PETII) having an intrinsic viscosity (solvent: phenol / tetrachloroethane=60 / 40) of 0.62 dl / g and substantially no inorganic particles was used under a reduced pressure of 133 Pa. , and dried at 135°C for 6 hours. Then, it was supplied to an extruder, melt-extruded into a sheet form at about 280 degreeC, and was quenched and solidified on the rotating cooling metal roll which kept the surface temperature at 20 degreeC, and the unstretched PET sheet was obtained.

[0202] The unstretched PET sheet was heated to 100° C. with a heated roll set and an infrared heater, and then stretched 3.5 times in the longitudinal direction by a roll set having a peripheral speed difference to obtai...

Embodiment 2

[0210] Except having changed the easy-slip coating liquid 1 to the following easy-slip coating liquid 2, it carried out similarly to Example 1, and obtained the mold release film for ultrathin-layer ceramic green sheet manufacture.

[0211] (Easy Slip Coating Liquid 2)

[0212]

Embodiment 3

[0214] Except having changed the easy-slip coating liquid 1 to the following easy-slip coating liquid 3, it carried out similarly to Example 1, and obtained the release film for ultrathin-layer ceramic green sheet manufacture.

[0215] (Easy slip coating solution 3)

[0216]

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PUM

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Abstract

[Problem] To provide a mold release film for producing ceramic green sheets that is excellent in both good windability and prevention of pinholes and partial thickness unevenness even when the ceramic green sheets are thinned. [Solution] A mold release film for producing ceramic green sheets, which uses a polyester film substantially free of inorganic particles as a base material, has a mold release coating layer on one surface of the base material, and is released from the mold by the above-mentioned mold release. In the nanoindentation test on the coating layer, the elastic modulus of the film measured from the surface on the opposite side to the substrate in the release coating layer is 2.0 GPa or more, and the other surface of the substrate has An easy-slip coating layer containing particles, the area of ​​the easy-slip coating layer having an average surface roughness (Sa) of 1 nm or more and 25 nm or less, a maximum protrusion height (P) of 60 nm or more and 500 nm or less, and an average width of contour cells (RSm) is 10 μm or less.

Description

technical field [0001] The present invention relates to a mold release sheet for the manufacture of ceramic green sheets. In more detail, it relates to the mold release film for ceramic green sheet manufacture which can be provided with favorable windability and prevention of pinholes and partial thickness unevenness even when a ceramic green sheet is thinned. Background technique [0002] Conventionally, a technique has been disclosed in which the surface roughness of the surface (back surface) opposite to the surface on which the release coating layer of the base film is provided is relatively rough, thereby eliminating the need for a mold release film for ceramic green sheet production to be Inconveniences such as sticking (blocking) on ​​the surface and the back surface of the mold release film for ceramic green sheet production during storage in the wound state (for example, refer to Patent Document 1). However, the above-mentioned prior art has a problem in that since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/30B32B7/022B32B27/00B32B27/36H01G4/30H01G13/00
CPCB28B1/30B32B7/02B32B27/00B32B27/36H01G4/30H01G13/00C08J7/04C08J5/18
Inventor 柴田悠介中谷充晴重野健斗松尾有加
Owner TOYOBO CO LTD
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