Diaphragm and method for producing same

Details Diaphragm and method for producing same Diaphragm and method for producing same

1990-10-23

1993-01-19

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525324, 181169, 381184, 381202, C08L 2308, G10K 1300

Patent

active

051807858

ABSTRACT:
A diaphragm formed of a material for molding mainly composed of a uniform mixture of an ultra-high molecular weight polyolefin with a high melting viscosity and a polyolefin with a lower melting viscosity, wherein the ultra-high molecular weight polyolefin is extensively oriented by the lubricating action of polyolefin having the lower melting viscosity and the method for producing the diaphragm. The diaphragm superior in specific modulus of elasticity and internal losses may be produced by producing the polyolefin composition by multi-stage polymerization and injection molding the composition for radially orienting the molecular chains of the ultra-high molecular weight polyolefin.

REFERENCES:
patent: 4786687 (1988-11-01), Sano et al.
patent: 4792588 (1988-12-01), Suga et al.
patent: 5022084 (1991-06-01), Shinjo

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