Resin foam and production method therefor

Abstract

Provided is a resin foam having excellent strain recovery, in particular having little shrinkage of the foam structure at high temperatures caused by the recovery force of the resin and excellent strain recovery at high temperatures. This resin foam is characterized by: being obtained from a resin composition including an elastomer and an active energy ray curable compound; having a glass transition temperature of 30°C or less, found by dynamic viscoelastic measurement of a measurement sample in a non-foamed state; and having a storage modulus (E') of 1.0 × 107 Pa or more at 20°C, found by dynamic viscoelastic measurement of the measurement sample in a non-foamed state.

Description

Technical field [0001] The present invention relates to a resin foam excellent in cushioning properties and deformation recovery properties (compression set properties) and a method for producing the same. In detail, it relates to internal insulators, cushioning materials, sound insulation materials, heat insulating materials, food packaging materials, clothing materials, and building materials, which are useful as internal insulators, cushioning materials, sound insulation materials, building materials for electronic devices, etc., have cushioning properties, and are particularly excellent in deformation recovery at high temperatures. Resin foam and its manufacturing method. Background technique [0002] Conventionally, foams used as internal insulators, cushioning materials, sound insulation materials, heat insulating materials, food packaging materials, clothing materials, and building materials for electronic devices, etc., have been combined as components from their tightnes...

AI Technical Summary

Problems solved by technology

However, these foams have the following disadvantages: weak strength, poor flexibility, poor cushioning properties, poor deformation recovery and reduced sealing performance especially when kept compressed at high temperature

[0007] In addition, in the above-mentioned thermoplastic resin foam based on thermoplastic polyurethane and thermoplastic elastomer, in the temperature range from the heat-resistant temperature limit of 80°C or higher, there may be cases where sufficient recovery cannot be exhibited due to plasticization of the material. , Deterioration due to heat, etc.

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