Dual-material self-bonding lip seal

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277DIG6, 428161, 428217, 428392, 428412, 428425, 428515, F16J 1532, B32B 2740, B32B 2712

Patent

active

040662691

ABSTRACT:
The invention is concerned with a unitary seal comprising a support section formed of a high modulus, i.e., rigid high impact strength plastic and a sealing section formed of an elastomeric material, the support and sealing section being directly bonded together without the use of an adhesive therebetween to form the unitary seal. Such a seal may take the form, for example, of a collar of the high modulus rigid plastic with an interior sealing lip of the elastomeric material within the collar and directly bonded thereto. In another sense the invention comprises a process for forming such a unitary seal. The process of the invention comprises contacting a surface portion of the support section directly with a surface portion of the sealing section, under sufficient pressure to assure a pressed contact therebetween, with the sections at a temperature of 50.degree. C - 400.degree. C for a time sufficient to cause bonding between the contacting surface portions to form the unitary seal.

REFERENCES:
patent: 2950266 (1960-08-01), Goldblum
patent: 3069287 (1962-12-01), Hudson
patent: 3413183 (1968-11-01), Findlay et al.
patent: 3413389 (1968-11-01), Footner
patent: 3528669 (1970-09-01), Tondato
patent: 3552755 (1971-01-01), Leonard
patent: 3622427 (1970-04-01), Kelly
patent: 3657057 (1972-04-01), Shorr et al.
patent: 3919448 (1975-11-01), Dufresne
patent: 3995868 (1976-12-01), Smith

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