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Crosslinked polyolefin resin foam, adhesive tape, laminate, molded article, and display member

A technology of resin foam and cross-linked polyolefin, applied in the field of cross-linked polyolefin resin foam, can solve problems such as poor mechanical properties and softness, and achieve the effect of inhibiting the change of color tone

Pending Publication Date: 2022-05-10
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the problem of light transmittance is sometimes solved by using acrylic resin foams as in Patent Documents 2 and 3, but the acrylic resin foams are not subjected to electron beam radiation as polyolefin resin foams. Compared with cross-linked foam, there is a problem that it is inferior in mechanical properties, flexibility, etc.

Method used

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  • Crosslinked polyolefin resin foam, adhesive tape, laminate, molded article, and display member
  • Crosslinked polyolefin resin foam, adhesive tape, laminate, molded article, and display member
  • Crosslinked polyolefin resin foam, adhesive tape, laminate, molded article, and display member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0169] 85 parts by mass of polypropylene resin (1), 15 parts by mass of polyethylene resin (1), 5.6 parts by mass of foaming agent (3), 3 parts by mass of crosslinking auxiliary agent, 0.5 parts by mass of phenolic antioxidant, and foaming 0.3 parts by mass of auxiliary agent (3) was mixed to prepare a foamable composition. The obtained foamable composition was melt-kneaded at a temperature of 180° C. through a single-screw extruder to obtain a foamable sheet. Both surfaces of this foamable sheet were irradiated with ionizing radiation (electron beam) at 2.0 Mrad at an acceleration voltage of 1000 keV, respectively, to obtain a crosslinked foamable sheet. Then, this crosslinked foamable sheet was supplied to a vertical hot-air foaming furnace at a furnace temperature of 250° C., and heated and foamed while stretching to obtain a target foam.

[0170] About the foam, evaluation of thickness, expansion ratio, total light transmittance, reflection color difference, and 25% compr...

Embodiment 2～21、 comparative example 1～6

[0199] Except having changed the composition of the foamable composition as shown in Tables 1-4, it carried out similarly to Example 1, and obtained the foam of Examples 2-12 and 14-21, and Comparative Examples 1-3 . In addition, the composition of the foamable composition was changed as shown in Tables 1 to 3, and the temperature at the time of melt kneading of the foamable composition was changed from 180° C. to 130° C., and it was performed in the same manner as in Example 1. And the foams of Example 13 and Comparative Examples 4-6 were obtained.

[0200] (thickness of foam)

[0201] The thicknesses of the foams of Examples and Comparative Examples were measured in accordance with JIS K6767.

[0202] (Foaming ratio of foam)

[0203] The expansion ratio is calculated by dividing the density of the expandable sheet|seet before expansion by the density (apparent density) of the foam after expansion.

[0204] (Total light transmittance of foam)

[0205] The total light tra...

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Abstract

The total light transmittance and thickness of the cross-linked polyolefin resin foam satisfy predetermined conditions, and the cross-linked polyolefin resin foam has a reflection color difference [delta] b * of-10 to 16, a reflection color difference [delta] a * of-3 to 3, and a reflection color difference [delta] L * of 50 or more. According to the present invention, it is possible to provide a cross-linked polyolefin resin foam capable of suppressing a change in color tone of transmitted light while ensuring transparency, and an adhesive tape, a laminate, a molded article, and a display member provided with the cross-linked polyolefin resin foam.

Description

technical field [0001] The present invention relates to a crosslinked polyolefin resin foam, an adhesive tape, a laminate, a molded body, and a display member. Background technique [0002] In vehicles such as automobiles, light display members that display information such as temperature, time, and vehicle speed with light have been actively developed in recent years from the viewpoint of improving their performance. In order to properly display information, an optical display member needs to have excellent light transmittance, and in order to constitute a part of the interior of a vehicle, it is required to maintain a soft touch and have a high-end feel such as excellent design. [0003] A foam is known as a material having flexibility. Foams are used in various industrial fields because they are excellent in cushioning properties, heat insulating properties, etc. in addition to flexibility. In addition, development of foams with improved light transmittance has also bee...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08L23/04C08L23/14C08L23/08C08K5/134C08J9/10C08J9/04
CPCC08J9/103C08J9/04C08J2323/10C08J2423/04C08J2323/14C08J2423/08C08J2203/04C08K5/1345C08L23/04C08L23/12C08J2201/026C08J9/0066C08J2323/16C08J2423/06C08J2201/03C08J2423/16C08J2207/02B32B5/245B32B2457/20B32B27/308B32B27/40B32B5/02B32B9/025B32B2255/102B32B2266/025B32B27/365B32B5/026B32B5/18B32B9/046B32B2605/003B32B2307/412B32B27/36B32B27/302B32B5/022B32B2274/00B32B15/046B32B27/304B32B27/32C08L23/0815C08K5/16C08K3/011C08K3/014C09J7/243C09J7/38C09J7/26C09J2301/122C09J2203/354C09J2301/302C09J2301/16C09J2203/326
Inventor 松井梨绘三上洋辉
Owner SEKISUI CHEM CO LTD
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