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Polyolefin resin foam sheet and adhesive tape

A polyolefin-based resin and foam sheet technology, applied in adhesives, pressure-sensitive films/sheets, film/sheet-shaped adhesives, etc., can solve the problem of reducing the foaming ratio of foam sheets The softness of the bubble sheet, the inability to use small electronic devices and other problems, achieve the effect of excellent flexibility and excellent light-shielding properties

Active Publication Date: 2020-02-04
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As a method to solve this problem, it is conceivable to reduce the expansion ratio of the foam sheet and to increase the thickness of the foam sheet. However, when these methods are used, the flexibility of the foam sheet will be lost, and it cannot be used in small problems with electronics

Method used

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  • Polyolefin resin foam sheet and adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Linear low-density polyethylene ("Exact3027" manufactured by Exon Chemical Co., Ltd., density: 0.900 g / cm2) was used as a polyolefin resin. 3 ) 100 parts by mass, 1.13 parts by mass of a pigment (manufactured by Dainichi Seika Co., Ltd., AP-09979), 2.1 parts by mass of azodicarbonamide as a thermally decomposable foaming agent, 1 mass part of zinc oxide as a decomposition temperature regulator parts, and 0.5 parts by mass of 2,6-di-tert-butyl-p-cresol as an antioxidant are supplied to the extruder, melted and kneaded at 130°C, and then the polyolefin resin composition is extruded into a length of about 0.3 mm in thickness. Strip flaky.

[0146] Next, irradiate the above-mentioned long sheet-shaped polyolefin-based resin composition with an electron beam of 70 kGy at an accelerating voltage of 500 kV to cross-link it, and then continuously send it through hot air and infrared heaters and keep it at 250 ° C. It was heated in a foaming furnace for foaming, and stretched w...

Embodiment 2～8、 example 1～8

[0148] The compounding of the polyolefin resin composition was changed as shown in Table 1 and Table 2, and the amount of thread at the time of crosslinking was adjusted to the gel ratio in Tables 1 and 2, and the draw ratio of MD and TD was adjusted to 1.2 times -4.0 times, except these, it carried out similarly to Example 1.

[0149] Table 1

[0150]

[0151] Table 2

[0152]

[0153] From the results of the above examples, it can be seen that the present invention can provide a polyolefin-based resin foam sheet having excellent light-shielding properties and excellent flexibility, and an adhesive tape using the polyolefin-based resin foam sheet. On the other hand, in Comparative Examples 1 and 2, the gel ratio was out of the predetermined range, the bubble diameter was large, and the light-shielding property was insufficient. In Comparative Examples 3 and 4, the 25% compressive stress was out of the prescribed range, and the compounding amounts of the pigments in Co...

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Abstract

This polyolefin resin foam sheet is formed by foaming a polyolefin resin composition that contains a polyolefin resin and a pigment, wherein the 25% compressive stress is 80-1400 kPa, the pigment content is 0.60-10.00 parts by mass per 100 parts by mass of resin, the density is 0.10-0.60 g / cm3, and the gel fraction is 25-60 mass%.

Description

[0001] The invention of this application is a divisional application of the application number 201780005106.2, the invention name is "polyolefin resin foam sheet and adhesive tape", and the application date is March 30, 2017. technical field [0002] The present invention relates to a polyolefin resin foam sheet and an adhesive tape using the polyolefin resin foam sheet. Background technique [0003] A foam sheet in which a large number of cells are formed in a resin layer has excellent impact cushioning properties and is widely used as an impact absorbing material for various electronic devices. Shock-absorbing materials are disposed between glass plates constituting the surface of the device and image display members in display devices used in, for example, mobile phones, notebook computers, and electronic books. Patent Document 1 discloses an adhesive tape having a polyolefin-based resin as a base material as a foam sheet used in such a use. [0004] prior art literature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/22C08K5/13C08J9/10C09J7/24C09J7/26C09J7/38C09J7/20
CPCC08J9/103C09J7/26C08J2203/04C08J2323/06C09J2423/046C09J7/243C08J5/18C09J2400/243C08J9/04C09J7/20C08J9/365C08J2205/052C08J2205/044
Inventor 永井麻美松木繁季
Owner SEKISUI CHEM CO LTD
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