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Adhesive tape and method for producing adhesive tape

A technology of adhesive tape and adhesive layer, applied in the direction of adhesive products, chemical instruments and methods, adhesives, etc., can solve the problems that the impact absorption cannot be fully improved, and achieve the effect of improving the impact absorption

Active Publication Date: 2016-04-13
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional foam sheet, when the thickness is reduced, there is a problem that the impact absorption cannot be sufficiently improved.

Method used

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  • Adhesive tape and method for producing adhesive tape
  • Adhesive tape and method for producing adhesive tape
  • Adhesive tape and method for producing adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13 and comparative example 1～5

[0168] Production of foam sheet:

[0169] Polyethylene-based resin (linear low-density polyethylene, "Exact3027" manufactured by ExxonMobil Chemical (Exxon Chemical Co., Ltd.), density: 0.900g / cm 3 ) 100 parts by weight, 1.9 parts by weight of azodicarbonamide, 0.2 parts by weight of 2,6-di-tert-butyl-p-cresol and 1.8 parts by weight of zinc oxide were supplied to the extruder, melted and kneaded at 130°C, and extruded A foam composition having a strip shape and a thickness of 0.5 mm was produced.

[0170] Next, both surfaces of the foam composition were irradiated with electron beams at an acceleration voltage of 500 kV at 4.5 Mrad to crosslink the foam composition. Thereafter, it is continuously sent to a foaming furnace maintained at 250°C based on hot air and infrared heaters, heated to make it foam, and then stretched to make the average diameter, average long diameter and average short diameter of the bubbles The diameter was the value shown in the following Table 1, a...

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Abstract

Provided is an adhesive tape which has excellent shock absorbing properties. An adhesive tape (1) according to the present invention is provided with: a foam sheet (2) that is obtained by foaming and crosslinking a polyolefin resin and has a plurality of air cells (2A) inside; and a first adhesive layer (3) that is arranged on a first surface (2a) of the foam sheet (2). The foam sheet (2) has a density of from 0.5 g / cm3 to 0.6 g / cm3 (inclusive) and a 25% compressive strength of from 380 kPa to 1,000 kPa (inclusive). The ratio of the average length of the air cells (2A) to the average breadth thereof in a plane direction perpendicular to the thickness direction of the foam sheet (2) is from 1.0 to 1.1 (inclusive).

Description

technical field [0001] The present invention relates to an adhesive tape in which an adhesive layer is laminated on at least one surface of a foam sheet obtained by foaming and crosslinking a polyolefin resin, and a method for producing the adhesive tape. Background technique [0002] A foam sheet formed of a resin and having a large number of cells inside is excellent in cushioning properties. Therefore, the above-mentioned foamed sheet is widely used as a shock absorbing material in various electronic machines. The above-mentioned impact absorbing material is used, for example, in a display device used in a mobile phone, a general-purpose personal computer, and electronic paper, arranged between a glass plate on the surface of the structural device and an image display member. [0003] A polyolefin resin is known as a material of the foam seat|seet used for the said use. The following Patent Document 1 discloses a polyolefin resin foam obtained by foaming and crosslinkin...

Claims

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Application Information

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IPC IPC(8): C09J7/02B32B5/18B32B27/00C09J11/06C09J133/04C09J7/26
CPCB32B5/18B32B7/12B32B27/065B32B27/308B32B2266/025B32B2307/72B32B2405/00B32B2457/00B32B2457/20C09J2203/318C09J2423/046C09J2433/00C09J133/08C09J7/26C08F220/1804C08F220/1808C08F220/1802C08F220/06C08F220/20C09J7/243C09J7/385C09J2301/16C09J2301/124C09J2301/40
Inventor 内田德之
Owner SEKISUI CHEM CO LTD
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