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Foam sheet and adhesive tape

A technology of foam and expansion ratio, applied in the direction of film/sheet adhesives, adhesives, pressure-sensitive films/sheets, etc., can solve environmental load problems and achieve good performance

Pending Publication Date: 2021-10-08
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resin used as a foam sheet is generally petroleum-derived resin, but a large amount of carbon dioxide is emitted during the manufacturing process and disposal process, so the load on the environment is a problem

Method used

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  • Foam sheet and adhesive tape
  • Foam sheet and adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Biomass resin (1) and polyethylene-based resin (1), azodicarbonamide as a thermally decomposable foaming agent, zinc stearate and zinc oxide as a cell nucleus regulator, an antioxidant, and a black pigment It supplied to the extruder by the compounding quantity described in Table 2, melt-kneaded at 130 degreeC, and obtained the resin composition. This resin composition was extruded to obtain a long foamable resin sheet.

[0131] Next, electron beam 4.5 Mrad of accelerating voltage 500kV was irradiated to both surfaces of the said elongated foamable resin sheet, and the resin sheet was crosslinked. The cross-linked foamable resin sheet was continuously fed into a foaming furnace maintained at 250° C. by hot air and an infrared heater, and expanded while being stretched in the MD and TD directions. A foam sheet having the thickness described in 1.

Embodiment 2～17 and comparative example 1～2

[0133] Each component supplied to the extruder was adjusted as described in Table 2, and a resin composition was obtained in the same manner as in Example 1. Then, the irradiation amount of the electron beam was adjusted so that the degree of crosslinking became as described in Table 2, and the degree of stretching was adjusted so that (MD+TD) / 2ZD became as described in Table 2. In addition, It carried out similarly to Example 1.

[0134] The foam sheets obtained in Examples and Comparative Examples were evaluated as follows.

[0135]

[0136] A test piece of about 100 mg was collected from the foam sheet, and the weight A (mg) of the test piece was accurately weighed. Next, put the test piece in xylene at 120°C for 30 cm 3 After immersing and leaving for 24 hours, filter through a 200-mesh metal mesh to collect the insoluble components on the metal mesh, vacuum dry, and accurately weigh the weight B (mg) of the insoluble components. From the obtained value, the degree of...

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Abstract

A foam sheet is a foam sheet including a biological polyolefin resin (A), wherein the biological rate of the foam sheet is equal to or greater than 40 mass%, the thickness is from 0.05 to 1.5 mm, and the expansion ratio is from 1.5 to 20 times.

Description

technical field [0001] The present invention relates to a foam sheet containing a biomass-based polyolefin resin, and an adhesive tape including the foam sheet. Background technique [0002] A foam sheet obtained by foaming a resin is widely used in various fields such as construction, electronic equipment, and vehicles, for example. The resin used as the foam sheet is generally petroleum-derived resin, but a large amount of carbon dioxide is emitted during the production process, disposal process, etc., and thus the load on the environment becomes a problem. Therefore, in order to solve such problems, studies using resins of natural origin have been conducted. [0003] For example, Patent Document 1 describes a foam having a biomass of 25% or more as measured by ASTM D6866 (established in 2004) using polyethylene (biomass-based polyethylene) containing components derived from ethylene derived from natural sources. In addition, Patent Document 2 describes a low-density pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/06
CPCC08J9/06C08J9/0061C08F110/02C08F210/02C09J7/26C09J7/38C08J2423/06C08J2423/08C08F2500/12
Inventor 松井梨绘
Owner SEKISUI CHEM CO LTD