Mold 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 surface roughness deterioration, poor compatibility, and large difference in surface tension of the mold release layer. , achieving good peelability, suppressing deterioration of surface roughness, and less defects
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Embodiment 1
[0197] After passing the coating solution 1 with the following composition through a filter capable of removing 99% or more of foreign matter of 0.5 μm or more, use a reverse gravure plate so that the coating film thickness (wet amount) becomes 5 g / m 2 Coated on the surface layer A of the laminated film X1 in the same way, and adjusted by entering the initial drying oven for 0.5 seconds. After drying at 100° C. for 2 seconds in an initial drying oven, it was continuously heated at 130° C. for 7 seconds in a heat curing process. 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 1 shows the results of measuring the film thickness, surface roughness, surface free energy, curl, etc. of the obtained release film. Moreover, when the ceramic slurry was apply|coated to the obtained release film, and applicability, peelability, and pinhole evaluation were performed, the favorab...
Embodiment 2～4、 comparative example 1、7
[0202] Except having changed the composition of the coating liquid 1 into the ratio shown in Table 1, it carried out similarly to Example 1, and produced the release film for ultrathin-layer ceramic green sheet manufacture. The results of evaluation of the obtained release film are as follows: Regarding the example in which a silicone-based release agent was added, the peeling force was also good; however, in Comparative Example 1 that did not contain a silicone-based release agent, the peeling force was reduced. High, as a result of defects such as pinholes that are prone to occur when the ceramic green sheet is peeled from the release film. In addition, Comparative Example 7 in which the amount of silicone-based mold release was small and the Si element ratio on the surface of the mold release layer was low had poor in-plane peeling uniformity.
Embodiment 5～7、 comparative example 2
[0204] The resin ratio of the coating solution 1 was kept constant, the solid content was changed to that described in Table 2, and the coating amount (solid content) of the release layer was changed. In the same manner as in Example 1, an ultra-thin layer ceramic green Release film for sheet manufacturing.
[0205] The results of evaluation of the obtained release film were as follows: The coating amount of the release layer was 0.2 g / m 2 The following examples are good results without curling; however, the amount of coating on the release layer is 0.75 g / m 2 Comparative Example 2 was a result of deterioration with large curl. In addition, in Comparative Example 2, the content of the silicone-based mold release agent contained in the mold release layer was large, and the Si element ratio on the outermost surface of the mold release layer tended to be high and the peeling stability tended to be poor.
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