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Release film for ceramic green sheet production and method for producing the same

A ceramic green sheet and manufacturing method technology, applied in chemical instruments and methods, manufacturing tools, capacitor manufacturing, etc., can solve the problem of poor compatibility, deterioration of surface roughness of mold release layer, deterioration of defective rate of laminated ceramic capacitors, etc. problem, to achieve the effect of reducing pinholes and good peelability

Active Publication Date: 2021-12-14
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the case of a release layer containing a binder resin and a silicone-based resin, the solubility of the binder resin and the silicone-based resin to organic solvents and the surface tension of the solution are greatly different, so there may be a problem when drying. Compatibility deteriorates, each resin aggregates to form protrusions, and the surface roughness of the release layer surface deteriorates
In the case of molding a ceramic green sheet with a thickness of 1.0 μm or less, and even 0.6 μm or less, pinholes and the like will occur even for these slight deteriorations in surface roughness, and the defect rate of the obtained multilayer ceramic capacitor will deteriorate. Therefore, further improvement is required. smoothness

Method used

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  • Release film for ceramic green sheet production and method for producing the same
  • Release film for ceramic green sheet production and method for producing the same
  • Release film for ceramic green sheet production and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] After passing the coating solution 1 of the following composition through a filter capable of removing 99% or more of foreign matter of 0.5 μm or more, it is coated on the surface layer A of the laminated film X1 by reverse gravure so that the coating film thickness (wet film thickness) After becoming 5 μm, it is adjusted so that it enters the initial drying oven within 0.5 seconds. After drying at 100° C. for 2 seconds in the initial drying oven, it was continuously put into a heating and curing step and heated at 130° C. for 7 seconds. After the heating and curing step, it was taken up into a roll after 8 seconds to obtain a release film for producing an ultra-thin ceramic green sheet. Table 3 shows the results of measuring the film thickness, surface roughness, surface free energy, and curl of the obtained release film. Furthermore, when the ceramic slurry was coated on the obtained release film, and the applicability, detachability, and pinholes were evaluated, fav...

Embodiment 2～4、 comparative example 1

[0197] Except having changed the composition of the coating liquid 1 so that it might become the ratio shown in Table 1, it carried out similarly to Example 1, and produced the mold release film for ultrathin-layer ceramic green sheet manufacture. As a result of evaluating the obtained release film, the peeling force was also good and good results were obtained for Examples in which a silicone-based release agent was added, but in Comparative Example 1 that did not contain a silicone-based release agent, the peeling force decreased. As a result, when the ceramic green sheet is peeled off from the release film, defective spots such as pinholes are likely to be generated.

Embodiment 5～7、 comparative example 2

[0199] Except for changing the resin ratio of the coating solution 1 to that shown in Table 1 and changing the film thickness of the release layer, a release film for producing ultra-thin ceramic green sheets was produced in the same manner as in Example 1. .

[0200] The obtained release film was evaluated, and it was a good result that there was no curling in Example in which the thickness of the release layer was 0.2 μm or less, but in Comparative Example 2 in which the thickness of the release layer was 0.5 μm, the curl was large. worsening results.

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Abstract

[Problem] To provide a release layer that contains at least a binder resin and a silicone-based resin as a release film for ceramic green sheet production, suppresses deterioration of surface roughness due to aggregation of the above components during drying, and has high smoothness A release film having excellent releasability and releasability, and a method for producing the release film. [Solution] A mold release film for producing ceramic green sheets, which is characterized in that it uses a polyester film as a base material, the base material has a surface layer A substantially free of particles on at least one side, and a surface layer A on at least one side A release layer with a film thickness of 0.2 μm or less is directly laminated on the surface of the surface layer A, or a release layer with a film thickness of 0.2 μm or less is laminated with other layers, and the release layer contains adhesive components and silicone-based release layers. The molding agent has a maximum protrusion height (P) of 50 nm or less on the surface of the release layer, and an arithmetic mean roughness (Sa) of 1.5 nm or less.

Description

technical field [0001] The present invention relates to a mold release film for producing ceramic green sheets, and in particular, relates to an ultra-thin layer capable of producing an ultra-thin layer that suppresses the occurrence of process defects caused by pinholes and uneven thickness during the production of ceramic green sheets. release film for the production of ceramic green sheets. Background technique [0002] In recent years, along with miniaturization and increase in capacity of multilayer laminated ceramic capacitors (abbreviated as MLCC), thinner ceramic green sheets are required. Multilayer laminated ceramic capacitors can be produced by coating a release film with a slurry containing ceramic components such as barium titanate and a binder resin and drying it to form a ceramic green sheet, printing electrodes on the obtained ceramic green sheet, and The release film is peeled off, ceramic green sheets are stacked, pressed, degreased and fired, and external...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/30B05D5/00B05D7/00B05D7/24B32B27/00B32B27/20B32B27/36C08J7/04C08L67/00H01G4/12H01G4/30H01G13/00C08J7/043C08J7/044
CPCB28B1/30B05D5/00B05D7/00B05D7/24B32B27/00B32B27/20B32B27/36H01G4/1218H01G4/306H01G13/00C08J7/044C08J7/043H01G4/12H01G4/30
Inventor 中谷充晴柴田悠介山本雄一郎森宪一重野健斗松尾有加
Owner TOYOBO CO LTD
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