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Polyolefin-based resin thin-layer foam sheet, production method and use thereof

A polyolefin-based resin and foam sheet technology, which is applied in the field of polyolefin-based resin thin-layer foam sheet and its manufacturing, can solve the problems of poor sealing, dust-proof performance, difficulty in processing, and difficult to process stably

Inactive Publication Date: 2016-04-27
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the slicing process, there are problems such as difficult to stably process to 0.5 mm or less, and difficult to process thinner 0.4 mm or less.
[0006] In addition, although the film can be thinned, it has the following problems: because it does not have a bubble layer, it has poor flexibility and cushioning properties, and the effects of sealing and dustproof properties are inferior to those of foams. so the weight becomes larger

Method used

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  • Polyolefin-based resin thin-layer foam sheet, production method and use thereof
  • Polyolefin-based resin thin-layer foam sheet, production method and use thereof
  • Polyolefin-based resin thin-layer foam sheet, production method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0207] To 40 parts by mass of a polypropylene resin (high melt tension polypropylene, MFR: 0.3 g / 10 minutes, melting point 164°C, manufactured by Japan Polypropylene Corporation, product name: NEWSTRENSH9000) as a polyolefin-based resin was added a thermoplastic elastomer (non-crosslinked ethylene - Propylene-diene copolymer elastomer, MFR: 11 g / 10 minutes, melting point 170° C., manufactured by Mitsubishi Chemical Corporation, product name: Thermorun Z101N) 60 parts by mass, and 100 parts by mass of a compounded resin composition was prepared.

[0208] A master batch (manufactured by Nitto Powder Chemical Industry Co., Ltd., product name: タルペット 70P) 10 containing 70% by mass of talc (average particle size: 13 μm) as a cell nucleating agent was mixed with 100 parts by mass of the obtained compounded resin composition. Parts by mass and 10 parts by mass of a pigment (manufactured by Toyo-chem Co., LTD., product name: PPMOYA164BLK-FD) were used to prepare a composition for foamin...

Embodiment 2）

[0216] Except having used the foamed sheet of thickness 1.5mm obtained by slicing one side of the polyolefin-based resin foamed sheet obtained in Example 1, the foamed sheet was heated by a dielectric heating roller in the same manner as in Example 1. The material was heated and pressurized to obtain a polyolefin-based resin thin-layer foamed sheet with a thickness of 0.23 mm.

[0217] Figure 4 Electron micrographs of the MD direction and the TD direction of the cross section of the thin-layer foamed sheet are shown.

[0218] The obtained thin-layer foamed polyolefin resin sheet could be easily pressed with a compression ratio of 85% compared to the original thickness, and the shape was maintained without recovery over time.

Embodiment 3）

[0220] Except having used the foamed sheet of thickness 0.5mm obtained by slicing both sides of the polyolefin-based resin foamed sheet obtained in Example 1, the foamed sheet was heated with a dielectric heating roller in the same manner as in Example 1. The material was heated and pressurized to obtain a polyolefin-based resin thin-layer foamed sheet with a thickness of 0.14 mm.

[0221] The obtained polyolefin-based resin thin-layer foamed sheet could be easily pressed with a compression ratio of 72% compared to the original thickness, and the shape was maintained without recovery over time.

[0222] Figure 5 Electron micrographs of the MD direction and the TD direction of the cross section of the thin-layer foamed sheet are shown.

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Abstract

The invention provides a polyolefin resin thin layer foaming sheet optimally serving as the sealing material of thinned, light and miniaturized electronic apparatuses and a manufacture method and use thereof. The polyolefin resin thin layer foaming sheet comprises a plurality of bubbles divided by a wall containing polyolefin resin. The polyolefin resin thin layer foaming sheet has a thickness of 0.05-0.5mm, a foaming ratio of 2-15 times, a continuous foaming ratio of 30-95% and a bubble breakage ratio of 1-30%.

Description

technical field [0001] The present invention relates to a polyolefin-based resin thin-layer foamed sheet, its production method, and use. Specifically, the present invention relates to a polyolefin-based resin thin-layer foamed sheet that is most suitable as a sealing material for thinning, weight-saving, and miniaturized electronic devices, and its production method and use. Background technique [0002] Polyolefin-based resin foams are widely used as cushioning materials (sealing materials), packaging materials, sealing materials, and the like because of their high strength and excellent flexibility. [0003] In recent years, along with the reduction in thickness, weight, and size of electronic devices such as smartphones and tablet terminals, reduction in thickness, weight, and size of components used are also required. Among them, the sealing material is also required to be thinner and lighter, and a thin-layer sheet of 0.5 mm or less is desired. [0004] Conventionall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/38C08J9/12C08L23/00
Inventor 木村和真田中伸洁山田浩二
Owner SEKISUI PLASTICS CO LTD