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Molded article and production method therefor

A manufacturing method and molding technology, applied to flat products, other household appliances, applications, etc., can solve the problems of opacity and high haze of sheet moldings, and achieve the effect of low haze

Inactive Publication Date: 2020-07-03
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, generally, the haze of the sheet molded body of PVDF having such spherulites is high, so such a sheet molded body is opaque.

Method used

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  • Molded article and production method therefor
  • Molded article and production method therefor
  • Molded article and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] A sufficient amount of polymer 2 was clamped on aluminum foil, and then clamped on a stainless steel (Steel Use Stainless, SUS) plate, using a compression molding machine (manufactured by Jindo Metal Industry Co., Ltd., model AYSR-5) at 175 ° C and 10 MPa. Compression was carried out under pressure for 10 minutes. Next, the pressed product was left to cool in the air for 30 minutes while continuing to be sandwiched between the SUS plates (hereinafter, this cooling method is also referred to as "cooling method 1" (slow cooling)). Thus, a sheet-shaped molded body 1 was produced. The thickness of the molded body 1 was measured five times for each sample using a thickness gauge "DG-925" (manufactured by ONO SOKKI CORPORATION), and the average value was calculated|required. This average value was regarded as the thickness of the molded body 1 . The thickness of the molded body 1 was 2.0 mm.

Embodiment 2～7

[0094] Molded bodies 2 to 7 were produced in the same manner as in Example 1 except that the distance at which the polymer was nipped by the compression molding machine was changed. The thicknesses of the molded bodies 2 to 7 were 1.7 mm, 1.2 mm, 0.6 mm, 0.2 mm, 1.4 mm, and 1.6 mm, respectively.

Embodiment 8～10

[0096] Molded articles 8 to 10 were produced in the same manner as in Example 7 except that polymers 1, 3, and 4 were used instead of polymer 2, respectively. The thicknesses of the moldings 8 to 10 are 1.5 mm, 1.5 mm, and 1.6 mm, respectively.

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Abstract

Provided are: a molded article of a vinylidene fluoride-based polymer composition, having a low haze even while having a thickness of more than 50 [mu]m; and a novel production method for the molded article. The vinylidene fluoride-based polymer molded article according to the present invention has a thickness of more than 50 [mu]m and a haze of 40% or less. In production of the molded article, avinylidene fluoride-based polymer composition having a predetermined shape is melted at a temperature within + / - 5 DEG C. of the melting point of the polymer so that molding is performed.

Description

technical field [0001] The present invention relates to a molded body made of a vinylidene fluoride polymer and a method for producing the same. Background technique [0002] A polyvinylidene fluoride (PVDF) film or sheet-like molded article (hereinafter also referred to as a "sheet molded article") may generate white fog. This is because, when the size of the spherulites generated during molding is larger than the wavelength of visible light, light is scattered in the molded sheet. Therefore, generally, a sheet molded body of PVDF having such spherulites has a high haze, and therefore such a sheet molded body is opaque. [0003] As a technique for reducing the haze of a sheet molded body made of PVDF with a thickness of 50 μm or less, a technique of stretching and orienting PVDF in a sheet molded body during cooling after melt extrusion of the sheet molded body is known (e.g. , refer to Patent Document 1). [0004] In addition, as a technique for reducing the haze of a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B29C43/34B29K27/12B29L7/00
CPCB29C43/34C08J5/18C08J2327/16B29C71/02B29C2071/022B29K2027/16B29L2007/002B29K2995/0012
Inventor 宫下达明铃木和元
Owner KUREHA KAGAKU KOGYO KK