Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-11-17
1990-11-27
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521134, 521145, C08J 924
Patent
active
049736094
ABSTRACT:
A porous fluoropolymer alloy material and method of fabrication is provided. The alloy material is fabricated by forming a compressed extrusion billet from two or more fluoropolymer resins capable of being stretched after extrusion and having different stretch characteristics. The fluoropolymer alloy billet is then extruded, stretched and sintered. The resulting material has a microstructure of large nodes interconnected by fibrils all oriented in the direction of stretch and has a higher tensile strength than produceable from previous porous fluoropolymer materials. Also, the resulting material can be made at lower stretch rates and at higher stretch ratios than previously possible without degradation of the material's strength. In one embodiment the resulting product is a self-supporting, tunable asymmetric porous fluoropolymer alloy material having a microstructure comprised of relatively small nodes, short fibrils and small pore size on one surface and relatively large nodes, long fibrils and large pore size on the opposite surface. The microstructure of the material gradually changes from the microstructure of the one surface to the microstructure of the opposite surface through the cross-section of the material's thickness, and all of the fibrils throughout the material are oriented in the direction of stretch.
REFERENCES:
patent: 3484503 (1969-12-01), Magner et al.
patent: 3764363 (1973-10-01), Civardi et al.
patent: 3933653 (1976-01-01), Hashino et al.
patent: 3936335 (1976-02-01), Martuch
patent: 3953566 (1976-04-01), Gore
patent: 3962153 (1976-06-01), Gore
patent: 4025679 (1977-05-01), Denny
patent: 4031283 (1977-06-01), Fagen
patent: 4049589 (1977-09-01), Sakane
patent: 4061134 (1977-12-01), Samuels et al.
patent: 4082893 (1978-04-01), Okita
patent: 4096227 (1978-06-01), Gore
patent: 4110392 (1978-08-01), Yamazaki
patent: 4116892 (1978-09-01), Schwarz
patent: 4177334 (1979-12-01), Okita
patent: 4193138 (1980-03-01), Okita
patent: 4208745 (1980-06-01), Okita
patent: 4209480 (1980-06-01), Homsy
patent: 4217399 (1980-08-01), Dobo
patent: 4225547 (1980-09-01), Okita
patent: 4248924 (1981-02-01), Okita
patent: 4250138 (1981-02-01), Okita
patent: 4277429 (1981-07-01), Okita
patent: 4283448 (1981-08-01), Bowman
patent: 4304010 (1981-12-01), Mano
patent: 4332035 (1982-06-01), Mano
patent: 4473617 (1984-09-01), van Leeuwen et al.
patent: 4482516 (1984-11-01), Bowman et al.
patent: 4546043 (1985-10-01), Yoshimoto et al.
patent: 4584240 (1986-04-01), Herbert et al.
patent: 4596837 (1986-06-01), Yamamoto et al.
patent: 4598011 (1986-07-01), Bowman
patent: 4629650 (1986-12-01), Kataoka
patent: 4650815 (1987-03-01), Namba
patent: 4716073 (1987-12-01), Randa
patent: 4737526 (1988-04-01), Mukaiyama et al.
patent: 4742085 (1988-05-01), Cozens
Hoke Veronica P.
Memron Inc.
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