Method for producing earplugs of foamed plastic

Details Method for producing earplugs of foamed plastic Method for producing earplugs of foamed plastic

1982-03-02

1984-07-10

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

128152, 264 453, 264 455, 264 54, 264145, 264235, 264346, 264DIG5, 264DIG18, 521 96, 521154, B29D 2700

Patent

active

044592477

ABSTRACT:
The invention relates to an earplug, produced with the use of a polysiloxane which is made foamable and cross-linkable by the use of expanding and cross-linking agents. The method for producing such an earplug comprises preshaping the polysiloxane together with the additives, then finally shaping the earplug in the foaming process and then tempering the finally shaped product.

REFERENCES:
patent: 2460795 (1949-01-01), Warrick
patent: 3271332 (1966-09-01), Bond et al.
patent: 3344220 (1967-09-01), Cook
patent: 3429838 (1969-02-01), Hersh
patent: 3565858 (1971-02-01), Kniege et al.
patent: 3677981 (1972-07-01), Wada et al.
patent: 3701753 (1972-10-01), Shaw
patent: 4026846 (1977-05-01), Kittle et al.
patent: 4160449 (1979-07-01), Wade
patent: 4340709 (1982-07-01), Jeram et al.
Chemical Abstracts, vol. 87, 1977; No. 87:185850q: Ito et al., 77-81378, 7/77, "Silicone Rubber Foams," (p. 64).

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