Foam molded body of thermoplastic polyester elastomer resin, and method for producing same
A thermoplastic polyester and foam molding technology, which is applied in the field of thermoplastic polyester elastomer resin foam molding, can solve the problem of not being able to manufacture lightweight and low-density foam without considering the cushioning or resilience of foam moldings. Foam body, high density of foamed molded body, etc., to achieve the effect of excellent light weight, high heat resistance, and uniform foam state
Active Publication Date: 2020-02-18
TOYOBO CO LTD
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Problems solved by technology
However, the density of foam moldings is high, and it is not yet possible to manufacture low-density foams that can meet the degree of weight reduction.
In addition, no consideration has been given to the cushioning properties and resiliency required for foam molded products.
[0007] In addition, as a foam suitable for an automobile seat, it is desirable to use a high-rebound urethane foam with a resilience of 60% or more. Although Patent Document 5 proposes the use of this urethane foam Production method, but because urethane foam generates cyanide gas when burned, there is a problem of environmental pollution
Method used
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[0040] Hereinafter, the thermoplastic polyester elastomer resin foam molded article of the present invention will be described in detail.
[0041] [Thermoplastic polyester elastomer (A)]
[0042] The thermoplastic polyester elastomer (A) used in the present invention is a combination of a hard segment and a soft segment. The hard segment consists of polyester. As the aromatic dicarboxylic acid constituting the polyester of the hard segment, common aromatic dicarboxylic acids are widely used and are not particularly limited, but as the main aromatic dicarboxylic acid, terephthalic acid or naphthalene dicarboxylic acid is preferable. Acids (2,6-naphthalene dicarboxylic acid is preferred among isomers). The content of these aromatic dicarboxylic acids is preferably 70 mol% or more, more preferably 80 mol% or more, in all the dicarboxylic acids constituting the hard segment polyester. Examples of other dicarboxylic acid components include aromatic dicarboxylic acids such as dip...
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Abstract
This foam molded body of a thermoplastic polyester elastomer resin includes: a resin layer containing a thermoplastic polyester elastomer (A), in which a hard segment comprising a polyester containingan aromatic dicarboxylic acid and an aliphatic and / or alicyclic diol as constituent components is joined to at least one soft segment selected from an aliphatic polyether, an aliphatic polyester andan aliphatic polycarbonate, and in which the content of soft segments is 55-90 mass%; and a foam layer comprising independent foam cells having an average cell diameter of 10-400 [mu]m and a maximum cell diameter of 10-500 [mu]m. The foam molded body has a rebound resilience of 60-90%, a density of 0.1-0.35 g / cm<3>, is lightweight, and exhibits excellent rebound resilience.
Description
technical field [0001] The present invention relates to a thermoplastic polyester elastomer resin foam molded article having high flexibility and excellent mechanical properties. More specifically, the resin foam molded article of the present invention is lightweight and has high rebound resilience, and can provide a high-quality foam molded article with a simpler molding method. Background technique [0002] Thermoplastic polyester elastomer is used as a material with excellent injection moldability, extrusion moldability, high mechanical strength, elastic recovery, impact resistance, softness, etc. , film, sports equipment parts, etc. [0003] Thermoplastic polyester elastomers are used in automotive parts, especially those used in high-temperature environments or automotive interior parts, because of their excellent heat aging resistance, light resistance, and abrasion resistance. In addition, weight reduction of resin parts has been progressing in recent years, and one...
Claims
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IPC IPC(8): C08J9/12B29C45/00B29C45/56B32B5/18B32B27/36C08J9/06C08J9/34
CPCB29C45/00B29C45/56B32B5/18B32B27/36C08J9/34C08J2205/044C08J2367/02C08J9/122C08J2203/06C08J2203/08C08J2371/02C08J9/0061C08J2425/14C08J9/22C08J9/06C08J9/12C08G63/181C08G63/672C08G63/64C08G63/47B29C44/42B29K2067/00B29K2105/04C08L67/025C08L2203/14
Inventor 森尾惠梨赤石卓也
Owner TOYOBO CO LTD