Articles molded from moisture shrinkable resins

Details Articles molded from moisture shrinkable resins Articles molded from moisture shrinkable resins

1990-07-02

1992-05-12

Nutter, Nathan M.

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

Synthetic resins

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

525 5421, 525 5423, 525 5424, 525 5426, 525 543, 525 5431, 525 59, 525 63, 525 64, 525 65, 525 69, 525 71, 525 78, 525 79, 525 80, 525 83, 525 88, 525 89, 525 90, 525 92, 525 93, 525 94, C08G 6348, C08G 6391, C08F 800, C08L 5100

Patent

active

051129035

ABSTRACT:
Articles molded from a moisture shrinkable polymer are provided. The article are stretched. The moisture shrinkable polymer may comprise a graft copolymer, a block copolymer, or a blend of a thermoplastic polymer with a hydrophilic synthetic polymer or a polysaccharide. The article absorb moisture and shrink at room temperature of not more than 50.degree. C. in a highly humid atmosphere. The articles experience little decrease in tensile strength during shrinkage by moisture absorption or by prolonged storage after the moisture absorption. The article is useful when used as a film for shrink wrapping commodities which are not resistant to heat.

REFERENCES:
patent: 3429794 (1969-02-01), Patterson
patent: 3867324 (1975-02-01), Clendinning et al.
patent: 3879493 (1975-04-01), Mudde
patent: 3931068 (1976-01-01), Clendinning et al.
patent: 4642267 (1987-02-01), Creasy et al.
patent: 4771089 (1988-09-01), Ofstead
patent: 4839450 (1989-06-01), Fanta et al.
patent: 4847324 (1989-07-01), Creasy

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