Method for producing pad structures with viscoelastic cores and

Details Method for producing pad structures with viscoelastic cores and Method for producing pad structures with viscoelastic cores and

1984-11-29

1988-07-12

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

156 60, 1563031, 428 68, 4283144, 4283197, B32B 326, B32B 100, B32B 3100

Patent

active

047569492

ABSTRACT:
In accordance with the invention, compositions of matter are provided for forming visco-elastic materials to simulate the physical feel of natural human soft tissue, such as fat or breast tissue. The compositions preferred are formed from a major portion of plasticizer and a minor portion of a resin. In a preferred embodiment, about 1100 parts by weight of a dialkyl phthalate plasticizer are thoroughly mixed with about 100 parts by weight of a polyvinyl chloride resin at an elevated temperature to form the visco-elastic material of the present invention. Included in the preferred composition are minor amounts of an epoxidized soybean oil stabilizer and a metallic salt stabilizer. A method is provided for producing visco-elastic materials and for producing pad structures comprising, preferably, an outer unattached covering of an elastic closed cell neoprene material and a core of said visco-elastic material.

REFERENCES:
patent: 3394210 (1968-07-01), Franze
patent: 3574021 (1971-04-01), Van Buskirk
patent: 3928704 (1975-12-01), Heidingsfeld et al.
patent: 4174420 (1979-11-01), Anolick et al.
Modern Plastics Encyclopedia, vol. 50, No. 10A, 1973-1974, pp. 107, 108, 113.

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