Extrusion of synthetic wood material

Details Extrusion of synthetic wood material Extrusion of synthetic wood material

1996-10-31

2002-02-05

Lipman, Bernard (Department: 1713)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

Reexamination Certificate

active

06344504

ABSTRACT:

BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates generally to wood replacement materials. In particular, the present invention relates to a wood-polymer composite material suitable for use in place of natural wood. The present invention includes a process for manufacturing the composite materials.
For several reasons, there is a need to find other materials that exhibit the look and feel of natural wood. One reason has to do with the supply of good wood for construction purposes from the world's forests. The supply of wood from mature trees has become an important issue in recent years and as a result the cost of wood has risen.
Several attempts have been made by others to find a wood like material. Many of these efforts have failed due to the poor qualities of the resultant product.
In addition to natural wood, other materials such as particle board, wafer board, and the like may be replaced by the synthetic wood of the present invention. One noticeable improvement over these materials is that synthetic wood has enhanced moisture resistance.
The present invention overcomes many of the disadvantages of the prior art attempts at a quality wood replacement material that is capable of being produced in a commercially practicable production environment. The present invention includes the combining of cellulosic material with a thermoplastic material and optionally with a cross-linking agent to form a combined product.
In the present invention an extrusion of the combined product under sufficient conditions to blend the combined product into a homogeneous mixture is described. The mixture of material is extruded through at least one die in a manner described in greater detail hereinafter.
The extruder preferably comprises a hopper to receive and mix the organic fibrous material and the thermoplastic material before being extruded through the die system. In a preferred material composition of the present invention, the synthetic wood material includes approximately two-thirds organic fibrous or cellulosic material and approximately one-third thermoplastic material in combination. The resultant product has an appearance similar to wood and may be sawed, sanded, shaped, turned, fastened and/or finished in the same manner as natural wood. The resultant product is resistant to rot and decay as well as termite attack. The resultant product may be used for example as, decorative moldings inside or outside of a house, picture frames, furniture, porch decks, window moldings, window components, door components, roofing systems, and any other type of use where structural requirements do not exceed the physical properties of the resultant material.
The present invention is useful in a number of different extrusion environments in which at least one extrusion die is employed. More particularly, in a preferred embodiment of the present invention, it is useful in conjunction with the synthetic wood composition and method as described in U.S. Pat. No. 5,516,472 which issued on May 14, 1996, entitled EXTRUDED SYNTHETIC WOOD COMPOSITION AND METHOD FOR MAKING SAME.


REFERENCES:
patent: 2188396 (1940-01-01), Semon
patent: 2519442 (1950-08-01), Delorme et al.
patent: 2935763 (1960-05-01), Newman et al.
patent: 3287480 (1966-11-01), Wechsler et al.
patent: 3562373 (1971-02-01), Logrippo
patent: 3645939 (1972-02-01), Gaylord
patent: 3864201 (1975-02-01), Susuki et al.
patent: 3867493 (1975-02-01), Seki
patent: 3878143 (1975-04-01), Baumann et al.
patent: 3879505 (1975-04-01), Boutlillier et al.
patent: 3888810 (1975-06-01), Shinomura
patent: 3922328 (1975-11-01), Johnson
patent: 3943079 (1976-03-01), Hamed
patent: 3954555 (1976-05-01), Kole et al.
patent: 3956541 (1976-05-01), Pringle
patent: 4012348 (1977-03-01), Chelland et al.
patent: 4016232 (1977-04-01), Pringle
patent: 4016233 (1977-04-01), Pringle
patent: 4018722 (1977-04-01), Baker
patent: 4029831 (1977-06-01), Daunheimer
patent: 4045603 (1977-08-01), Smith
patent: 4056591 (1977-11-01), Goettler et al.
patent: 4071479 (1978-01-01), Broyde et al.
patent: 4071494 (1978-01-01), Gaylord
patent: 4097648 (1978-06-01), Pringle
patent: 4102106 (1978-07-01), Golder et al.
patent: 4107110 (1978-08-01), Lachowicz et al.
patent: 4145389 (1979-03-01), Smith
patent: 4157415 (1979-06-01), Lindenberg
patent: 4168251 (1979-09-01), Schinzel et al.
patent: 4178411 (1979-12-01), Cole et al.
patent: 4181764 (1980-01-01), Totten
patent: 4187352 (1980-02-01), Klobbie
patent: 4191798 (1980-03-01), Schumacher et al.
patent: 4203876 (1980-05-01), Dereppe et al.
patent: 4228116 (1980-10-01), Colombo et al.
patent: 4239679 (1980-12-01), Rolls et al.
patent: 4241133 (1980-12-01), Lund et al.
patent: 4244903 (1981-01-01), Schnause
patent: 4248743 (1981-02-01), Goettler
patent: 4250222 (1981-02-01), Mavel et al.
patent: 4263184 (1981-04-01), Leo et al.
patent: 4263196 (1981-04-01), Schumacher et al.
patent: 4272577 (1981-06-01), Lyng
patent: 4273688 (1981-06-01), Porzel et al.
patent: 4303019 (1981-12-01), Haataja et al.
patent: 4305901 (1981-12-01), Prince et al.
patent: 4317765 (1982-03-01), Gaylord
patent: 4323625 (1982-04-01), Coran et al.
patent: 4376144 (1983-03-01), Goettler
patent: 4382758 (1983-05-01), Nopper et al.
patent: 4414267 (1983-11-01), Coran et al.
patent: 4420351 (1983-12-01), Lussi et al.
patent: 4430468 (1984-02-01), Schumacher
patent: 4480061 (1984-10-01), Coughlin et al.
patent: 4491553 (1985-01-01), Yamada et al.
patent: 4503115 (1985-03-01), Hemels et al.
patent: 4505869 (1985-03-01), Nishibori
patent: 4506037 (1985-03-01), Suzuki et al.
patent: 4508595 (1985-04-01), Gåsland
patent: 4562218 (1985-12-01), Fornadel et al.
patent: 4594372 (1986-06-01), Natov et al.
patent: 4597928 (1986-07-01), Terentiev et al.
patent: 4610900 (1986-09-01), Nishibori
patent: 4645631 (1987-02-01), Hegenstaller et al.
patent: 4659754 (1987-04-01), Edwards et al.
patent: 4687793 (1987-08-01), Motegi et al.
patent: 4717742 (1988-01-01), Beshay
patent: 4737532 (1988-04-01), Fujita et al.
patent: 4783493 (1988-11-01), Motegi et al.
patent: 4789604 (1988-12-01), van der Hoeven
patent: 4791020 (1988-12-01), Kokta
patent: 4801495 (1989-01-01), van der Hoeven
patent: 4818604 (1989-04-01), Tock
patent: 4820749 (1989-04-01), Beshay
patent: 4851458 (1989-07-01), Hopperdietzel
patent: 4889673 (1989-12-01), Takimoto
patent: 4894192 (1990-01-01), Warych
patent: 4915764 (1990-04-01), Miani
patent: 4927572 (1990-05-01), van der Hoeven
patent: 4927579 (1990-05-01), Moore
patent: 4935182 (1990-06-01), Ehner et al.
patent: 4968463 (1990-11-01), Levasseur
patent: 5008310 (1991-04-01), Beshay
patent: 5009586 (1991-04-01), Pallmann
patent: 5064592 (1991-11-01), Ueda et al.
patent: 5075359 (1991-12-01), Castagna et al.
patent: 5078937 (1992-01-01), Eela
patent: 5082605 (1992-01-01), Brooks et al.
patent: 5087400 (1992-02-01), Theuveny
patent: 5088910 (1992-02-01), Goforth et al.
patent: 5096046 (1992-03-01), Goforth et al.
patent: 5096406 (1992-03-01), Brooks
patent: 5120776 (1992-06-01), Raj et al.
patent: 5153241 (1992-10-01), Beshay
patent: 5194461 (1993-03-01), Bergquist et al.
patent: 5272000 (1993-12-01), Chenoweth et al.
patent: 5276082 (1994-01-01), Forry et al.
patent: 5288772 (1994-02-01), Hon
patent: 5302634 (1994-04-01), Mushovic
patent: 5369147 (1994-11-01), Mushovic
patent: 5406768 (1995-04-01), Giuseppe et al.
patent: 5474722 (1995-12-01), Woodhams
patent: 5480602 (1996-01-01), Nagaich
patent: 5486553 (1996-01-01), Deaner et al.
patent: 5497594 (1996-03-01), Giuseppe et al.
patent: 5516472 (1996-05-01), Laver
patent: 5518677 (1996-05-01), Deaner et al.
patent: 5532065 (1996-07-01), Gübitz
patent: 5539027 (1996-07-01), Deaner et al.
patent: 5576374 (1996-11-01), Betso et al.
patent: 5585155 (1996-12-01), Heikkila et al.
patent: 5593625 (1997-01-01), Riebel et al.
patent: 2042176 (1971-04-01), None
patent: 3801574 (1989-08-01), None
patent: 0586211 (1994-03-01), None
patent: 0586212 (1994-03-01), None
patent: 0586213 (1994-03-01), None
patent: 0747419 (1996-12-01), None
patent: 2270311 (1974-02-01), None
patent: 2365017 (1978-04-01), None
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