Fatigue-resistant layered elastomeric structure
AssigneeWuXi KeYi New Material CO., LTD
InventorHao Chen
Life of this patent
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Abstract
A fatigue-resistant layered elastomeric structure is obtained by first extruding raw material of thermoplastic polyester elastomer into long linear structures. The long linear structures are further curled and bonded to form a volume of layered elastomeric structure with a certain thickness. Intermittently bonded points and continuously bonded points with fused sections equal to longer than 5 mm are formed during this process. Among all bonded points, the continuously bonded points have a proportion of at least 20%. Hardness loss rate after repeated compression is less than 23%. Relevant parameters are adjusted to obtain even larger percentages of continuously bonded points with better repeated compression durability.
Claims5
A fatigue-resistant layered elastomeric structure obtained by extruding raw material of thermoplastic polyester elastomer into long linear structures, curling, and bonding the long linear structures to form a layered three dimensional structure with a preset volume, wherein
- the raw material of thermoplastic polyester elastomer has a melt index of 15-25 g/10 min and a melting point below 180° C.;
- the long linear structures in contact with each other form intermittently bonded points and a proportion of at least 20% of continuously bonded points among a total number of bonded points, wherein the continuously bonded points comprise fused sections being 5 mm in length or longer;
- and
- the layered elastomeric structure has a hardness loss rate less than 25% after being repeatedly compressed for 80,000 times under a compression force of 750 N, and a 40% compression hardness between 100 N and 350 N.
Dependencies are inferred from the claim text.