Process for producing microconfiguration transfer sheet and apparatus therefor

Abstract

A process for producing a sheet and apparatus therefor that in the operation of heating a sheet substratum and a metal mold with fine uneven configuration, bringing them into mutual contact and pressurizing the same so as to form the fine uneven configuration on a surface of the sheet substratum, avoid transfer failure attributed to air trapping at the transfer face between the metal mold and the sheet substratum to thereby obtain a sheet having the desired fine uneven configuration formed on its surface. There are provided a process for producing a microconfiguration transfer sheet, and apparatus therefor, comprising, in the microconfiguration transfer sheet producing operation including heating a sheet substratum and a metal mold with fine uneven configuration, bringing them into mutual contact and pressurizing the same so as to form the fine uneven configuration on a surface of the sheet substratum, carrying out the configuration formation while changing the planarity of a configuration forming face consisting of at least one, or a combination, of a pair of pressurization plates or metal molds arranged so as to apply pressure to the sheet substratum and the metal mold.

Description

technical field [0001] The present invention relates to a production method and a production apparatus of a sheet having the fine three-dimensional shape on the surface through transfer of the fine shape. Background technique [0002] As a method of forming a three-dimensional shape such as fine unevenness on the surface of a resin sheet or the like, a method in which the material such as a resin sheet is pressed with a heated mold having fine unevenness to transfer the three-dimensional shape of the unevenness to the resin sheet It is already known (Patent Documents 1 to 2). [0003] However, when using this method to transfer and form fine shapes on a large-area resin sheet, there is a problem that the transfer surface squeezes air between the mold and the sheet to be processed, so that the fine three-dimensional shapes cannot be completely transferred. , the transfer effect is poor. [0004] This problem of squeezing air in occurs when the thickness of the sheet-like ba...

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Problems solved by technology

[0006] However, since this method bends the pressing plate with springs of different elasticity, even if it is flattened by pressing with a press, the surface pressure of the forming surface will vary due to the high pressure of the protruding part, etc. This will lead to differences in transfer accuracy of fine shapes within the forming surface, and as a result, uniform transfer accuracy cannot be obtained.

In particular, the finer the surface shape, the more prominent the problem, and the thickness of the processed sheet obtained due to the difference in surface pressure distribution is also unsatisfactory.

Furthermore, when it is desired to change the amount of deformation, it takes time to change the position of the spring member and its support holder every time, so it is not practical.

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