Moldable article, method of making and composition for making moldable articles
View Patent ↗A moldable article that can be custom-fitted to a particular user. Such an article comprises a thermoplastic material such as ethylene vinyl acetate modified by an antistatic agent selected from the group consisting of polyol amines such as ethoxylated amines, ethoxylated fatty alcohols, phosphoric acid esters, quaternary ammonium salts, and amphoteric compounds such as betaine. The article is heated until the thermoplastic material softens, then pressed against a user's body part. The article is allowed to cool, resulting in a custom-fitted article. Such articles may be repeatedly re-heated and re-molded and may include, e.g., moldable footbeds, racquet handles, shin guards, helmets, and seats.
1. A moldable article including a layer consisting essentially of foamed ethylene vinyl acetate copolymer and an antistatic agent, wherein said article is a helmet insert.
2. The article of claim 1 , wherein said layer comprises between approximately ten percent and approximately thirty percent antistatic agent.
3. The article of claim 1 , wherein said antistatic agent is selected from the group consisting of a polyol amine, an ethoxylated fatty alcohol, a phosphoric acid ester, a quatemary ammonium salt, and an amphoteric compound.
4. The article of claim 1 , wherein said antistatic agent is a polyol amine.
5. The article of claim 4 , wherein said polyol amine is an ethoxylated amine.
6. The article of claim 1 , wherein said antistatic agent is an amine derivative having the formula R1N(R2)2, wherein R1 is a hydrophobic alkyl group and R2 is an alkyl group substituted by at least one hydrophobic moiety selected from OH, CO2H, CO2R3, wherein R3 is an alkyl.
7. The article of claim 6 , wherein R2 is a hydroxyalkyl group.
8. The article of claim 7 , wherein R2 is hydroxyethyl.
9. The article of claim 1 , wherein said layer comprises approximately seventy percent ethylene vinyl acetate copolymer and approximately thirty percent antistatic agent.
10. The article of claim 1 , wherein said wherein said article is custom-fitted to a wearer's head.