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Process for producing foam

A manufacturing method and foam technology, applied in the field of foam, can solve problems such as productivity problems, limitations in improving light utilization efficiency, and limitations in thinning light-scattering light guides, so as to reduce shrinkage, suppress low mechanical strength, and improve The effect of dimensional stability

Inactive Publication Date: 2007-09-05
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0039] In either of the above methods, there is a limit to thinning the light-scattering light guide
[0040] In addition, when a light-scattering light guide is formed by stacking reflective sheets, light guide plates, prisms, etc. in a box-shaped frame, gaps will be created between optical components just by storing them, and light leakage cannot be completely suppressed.
Therefore, there is also a limit to improving light utilization efficiency
In addition, since it is constructed using a large number of parts, there is also a problem in terms of productivity

Method used

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  • Process for producing foam
  • Process for producing foam
  • Process for producing foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0545] (1) Foaming composition

[0546] The following foaming composition A was used: 100 parts of a copolymer of tert-butyl acrylate (20%), tert-butyl methacrylate (40%) and methyl methacrylate (40%) as a decomposable compound, 3 parts of perfluorobutanesulfonic acid bis(4-tert-butylphenyl)iodonium salt (trademark: BBI-109, manufactured by Midori Chemical Co., Ltd.) were mixed as an iodonium salt series acid generator.

[0547] (2) Preliminary forming process

[0548]The foamable composition having the above mixing ratio was prepared as a 25% solution with a diluent of MEK / ethyl acetate=65 / 35 (mass ratio), and this solution was used as a coating solution. Use an applicator with an opening (clearance) of 300 μm to apply the coating solution on the silicon-treated surface of a support made of silicon PET (trademark: MR-75, manufactured by Mitsubishi Polyester) with a thickness of 75 μm, and heat the coating liquid at 110° C. Place in a constant temperature dryer for 10 minute...

Embodiment 2

[0556] A foam was produced in the same manner as in Example 1 except that a pressure of 2 MPa was applied to the laminated sample in the foaming step. The section photo is shown in Figure 6.

[0557] As a result of evaluating the foam structure in the same manner as in Example 1, the obtained foam was a slab foam having an average cell diameter of 0.1 μm, an expansion ratio of 1.8, and a thickness of 700 μm.

Embodiment 3

[0559] (1) Foaming composition

[0560] The same substance as in Example 1 was used.

[0561] (2) Preliminary forming process

[0562] In the same manner as in Example 1, a support-attached coating layer in which a 45-μm-thick foamable composition was provided on silicon PET was prepared.

[0563] (3) Ultraviolet radiation

[0564] A metal halide lamp (trademark: Aigrafitsuku Co., Ltd., multi-metal lamp M03-L31 for ultraviolet curing) was used as the light source, and the temperature was 2000 mJ / cm 2 The amount of irradiation light is irradiated with ultraviolet rays from the coating layer surface side to the coating layer with support in (2). The coating layer was peeled off from the silicon PET after the ultraviolet ray irradiation, thereby obtaining a film of the foaming composition that had been irradiated with ultraviolet rays.

[0565] (4) Foam molding process

[0566] From the film obtained by (3), 10 films of 5 cm x 6 cm were cut out and laminated, and a manual pr...

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Abstract

The present invention relates to a foam body with a plurality of separate bubbles and / or a plurality of successive bubbles and a method for producing the foam body, in particular to a method for producing a foam body of micro bubbles in diameter equal to or smaller than 10 Mu m with expected thickness, shape, and foamy structure. The present invention provides a method for producing a foam body through the following procedures: an irradiation procedure: irradiate beams with active energy on a foam compound, wherein, the foam compound contains acid generator that can produce acid or alkali generator that can produce alkali under the beams with active energy, and a chemical compound that can react with acid or alkali and decompose and release decomposed functional groups of one or more low boiling point volatile matters; and, a foaming procedure: the foam compound generate foams under pressure control within the temperature range in which the low boiling point volatile matters are released.

Description

technical field [0001] The present invention relates to a foam formed with a plurality of independent bubbles and / or a plurality of continuous bubbles and a method for producing the same, and in particular to a foam having a bubble diameter of 10 μm or less and fine bubbles of 1 μm or less. A method for producing a foam with fine cells in thickness, shape, and foam structure. In addition, the foam obtained by the production method of the present invention is a foam having highly functional fine cells that cannot be obtained in the prior art, that is, a raw material that not only has the effect of suppressing the decrease in the mechanical strength of the foam, but also reduces Shrinkage and warpage of molded products such as injection molding, and the effect of improving dimensional stability, and can freely control the heat insulation, low permittivity, light scattering, light reflection, masking, and whiteness of the foam , opacity, wavelength selective reflection and trans...

Claims

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Application Information

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IPC IPC(8): C08J9/02G02F1/13357C08J9/06C08L101/00G02B6/00C08L33/04F21V8/00G02F1/1335
Inventor 高田知行小岛淳也神野文夫
Owner OJI PAPER CO LTD
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