Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1988-04-14
1990-02-20
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
2642104, 2642106, 2642108, 264211, 26421115, 26421116, 26421117, 26421118, 26421119, 2642112, 26421121, 26421122, 26421124, 264232, 264236, 264340, 264347, 264349, 26421113, D01F 110, D01F 1100
Patent
active
049024604
ABSTRACT:
If ultra-high-molecular-weight polyethylene having an intrinsic viscosity (.beta.) of at least 5 dl/g is grafted with a silane compound in the presence of a radical initiator and extrusion-molded and the extrudate is impregnated with a silanol condensation catalyst after or during drawing and is then exposed to water to effect crosslinking, there is obtained a novel molecularly oriented molded article in which increase of the melting temperature, which is not observed in conventional drawmolded or crosslinked molded articles of polyethylene, can be attained, and even if this molecularly oriented molded article is exposed to a temperature of 180.degree. C. for 10 minutes, the molded article is not fused but the shape is retained and even after this heat history, a high strength retention ratio can be maintained. In this draw-molded article, the adhesiveness and creep resistance are prominently improved while high elastic modulus and high tensile strength inherent to a drawmolded article of ultra-high-molecular-weight polyethylene are retained.
REFERENCES:
patent: 3646155 (1972-02-01), Scott
patent: 4136132 (1979-01-01), Poole
patent: 4422993 (1983-12-01), Smith et al.
patent: 4430383 (1984-02-01), Smith et al.
patent: 4545950 (1985-10-01), Motooka et al.
patent: 4595546 (1986-06-01), Wheeler, Sr.
Mantoku Hitoshi
Yagi Kazuo
Lorin Hubert C.
Mitsui Petrochemical Industries Ltd.
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