US5827607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Advanced polymer wood composite
Assignee: Andersen Corp
•
Filing: 1995-10-17
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Granted: 1998-10-27
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Expires: 2015-10-17
Abstract
Abstract The invention relates to a thermoplastic composite material consisting essentially of a thermoplastic polymer and a wood fiber. The composite can be used in the form of a linear extrudate or a thermoplastic pellet to manufacture structural members. The linear extrudate or pellet can have any arbitrary cross-section or can be a regular geometric shape. Typically the thermoplastic polyvinyl chloride polymer and the wood fiber are combined and extruded in the form of a pellet. The pellet can be then taken, placed in an extruder and extruded in the form of a structural member. The composite material of the invention can be used to form structural members having high modulus (greater than about 500,000 psi). The thermoplastic structural members of the invention can then be recycled to form new thermoplastic.
Inventors
- 👤 Michael J. Deaner
- 👤 Giuseppe Puppin
- 👤 Kurt E. Heikkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; B; B27; B27N; B27N3/00; B27N3/007; B27N3/08; B27N3/28; B29; B29B; B29B9/00; B29B9/12; B29B9/14; C08J; C08J11/00; C08J11/04; C08J11/06; C08J5/00; C08J5/04; C08J5/045; C08J5/047; C08J5/06; C08L27/00; C08L27/02; C08L27/04; C08L27/06; B29K; B29K2311/00; B29K2311/14; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08K; C08K7/00; C08K7/02; C08L101/00; C08L2205/00; C08L2205/03; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249925; Y10T428/25; Y10T428/253; Y10T428/26; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2965; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31551; Y10T428/31591; Y10T428/31725; Y10T428/31779; Y10T428/31783; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
121 words
A composite pellet, capable of formation into a structural member, the pellet comprising a thermoplastic extrudate having a length of about 1 to 10 mm: the thermoplastic consisting essentially of: (a) about 45 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum dimension of about 0.1 mm and a minimum aspect ratio of about 1.8; and (c) less than about 8 wt-% water; and wherein the polymer and wood fiber are mixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a contiguous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 2
Dependent Claim
121 words
A composite pellet, capable of formation into a structural member, the pellet comprising a thermoplastic extrudate having a length of about 1 to 10 mm: the thermoplastic consisting essentially of: (a) about 45 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum dimension of about 0.1 mm and a minimum aspect ratio of about 1.8; and (c) less than about 8 wt-% water; and wherein the polymer and wood fiber are mixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a contiguous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 3
Dependent Claim
26 words
The composite of claim 1 wherein the extrudate is cylindrical having a radius of 1 to 5 mm and the polymer comprises a polyvinyl chloride homopolymer.
Claim 4
Dependent Claim
18 words
The composite of claim 2 wherein the polymer has a weight average molecular weight (Mw) of about 90,000±50,000.
Claim 5
Dependent Claim
13 words
The composite of claim 1 wherein the polymer comprises a polyvinyl chloride copolymer.
Claim 6
Dependent Claim
18 words
The composite of claim 4 wherein the copolymer has a weight average molecular weight (Mw) of about 88,000±10,000.
Claim 7
Dependent Claim
18 words
The composite of claim 1 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 8
Dependent Claim
11 words
The composite of claim 6 wherein the wood fiber comprises sawdust.
Claim 9
Dependent Claim
11 words
The composite of claim 1 wherein the wood fiber comprises sawdust.
Claim 10
Dependent Claim
28 words
The composite of claim 1 wherein the wood fiber has a fiber width of about 0.3 to 1.5 mm and an aspect ratio of about 2 to 7.
Claim 11
Dependent Claim
16 words
The composite of claim 1 wherein water comprises about 0.01 to 5 wt-% of the pellet.
Claim 12
Dependent Claim
116 words
A polymer and wood fiber composite capable of formation into a structural member, which composite comprises a thermoplastic linear extrudate composition, the thermoplastic consisting essentially of: (a) about 45 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum dimension of about 0.3 mm and an aspect ration of about 1.8; (c) less than about 8 wt-% water; and wherein the polymer and the wood fiber are premixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a continuous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 13
Dependent Claim
116 words
A polymer and wood fiber composite capable of formation into a structural member, which composite comprises a thermoplastic linear extrudate composition, the thermoplastic consisting essentially of: (a) about 45 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum dimension of about 0.3 mm and an aspect ration of about 1.8; (c) less than about 8 wt-% water; and wherein the polymer and the wood fiber are premixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a continuous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 14
Dependent Claim
13 words
The composite of claim 11 wherein the polymer comprises a polyvinyl chloride homopolymer.
Claim 15
Dependent Claim
13 words
The composite of claim 11 wherein the polymer comprises a polyvinyl chloride copolymer.
Claim 16
Dependent Claim
18 words
The composition of claim 13 wherein the copolymer has a weight average molecular weight (Mw) of about 88,000±10,000.
Claim 17
Dependent Claim
18 words
The composite of claim 11 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 18
Dependent Claim
11 words
The composite of claim 15 wherein the wood fiber comprises sawdust.
Claim 19
Dependent Claim
18 words
The composition of claim 15 wherein the polymer has a weight average molecular weight (Mn) of about 95,000±50,000.
Claim 20
Dependent Claim
13 words
The composite of claim 11 wherein the composition additionally comprises a compatibilizing agent.
Claim 21
Dependent Claim
28 words
The composite of claim 11 wherein the wood fiber has a fiber width of about 0.3 to 1.5 mm and an aspect ratio of about 2 to 7.
Claim 22
Dependent Claim
16 words
The composite of claim 11 wherein water comprises about 0.01 to 5 wt-% of the pellet.
Claim 23
Dependent Claim
144 words
A composite composition, capable of extrusion into a dimensionally stable structural member, which composition comprises a thermoplastic material consisting essentially of: (a) about 40 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum width of about 0.3 mm and a minimum length of about 0.54 mm and an aspect ration of greater than about 1.8; (c) about 0.1 to 25 wt-% of an intentionally recycled impurity comprising thermoplastic polymer, an adhesive, a paint, a thermoplastic resin or mixtures thereof; and (d) less than about 10 wt-% water; wherein the polymer and wood fiber are mixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a continuous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 24
Dependent Claim
144 words
A composite composition, capable of extrusion into a dimensionally stable structural member, which composition comprises a thermoplastic material consisting essentially of: (a) about 40 to 70 wt-% of a polymer comprising vinyl chloride; (b) about 30 to 50 wt-% of wood fiber having a minimum width of about 0.3 mm and a minimum length of about 0.54 mm and an aspect ration of greater than about 1.8; (c) about 0.1 to 25 wt-% of an intentionally recycled impurity comprising thermoplastic polymer, an adhesive, a paint, a thermoplastic resin or mixtures thereof; and (d) less than about 10 wt-% water; wherein the polymer and wood fiber are mixed at an elevated temperature and pressure such that an intimate admixture is formed in which the wood fiber is dispersed throughout a continuous polymer phase and wherein the composite has a Young's modulus greater than 600,000 psi.
Claim 25
Dependent Claim
13 words
The composition of claim 21 wherein the polymer comprises a polyvinyl chloride homopolymer.
Claim 26
Dependent Claim
18 words
The composition of claim 22 wherein the polymer has a weight average molecular weight (Mw) of about 95,000±50,000.
Claim 27
Dependent Claim
13 words
The composition of claim 21 wherein the polymer comprises a polyvinyl chloride copolymer.
Claim 28
Dependent Claim
18 words
The composition of claim 24 wherein the copolymer has a weight average molecular weight (Mw) of about 88,000±10,000.
Claim 29
Dependent Claim
18 words
The composition of claim 21 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 30
Dependent Claim
11 words
The composition of claim 21 wherein the wood fiber comprises sawdust.
Claim 31
Dependent Claim
28 words
The composition of claim 21 wherein the wood fiber has a fiber width of about 0.3 to 1.5 mm and an aspect ratio of about 2 to 7.
Claim 32
Dependent Claim
20 words
The composition of claim 21 wherein the wood concentration of water comprises about 0.01 to 3.5 wt-% of the composition.
References Cited (Backward Citations)
US2188396A
Cited
US2519442A
Cited
US2489373A
Cited
US2558378A
Cited
US2635976A
Cited
US2680102A
Cited
US2935763A
Cited
US2789903A
Cited
US2926729A
Cited
US3147518A
Cited
US3308218A
Cited
US3309444A
Cited
US3493527A
Cited
US3432885A
Cited
US3287480A
Cited
US3349538A
Cited
US3492388A
Cited
US3645939A
Cited
US3562373A
Cited
DE2042176A1
Cited
US3671615A
Cited
US3888810A
Cited
US3904726A
Cited
US3833325A
Cited
FR2200112A1
Cited
US3931384A
Cited
US3878143A
Cited
US3899559A
Cited
US4228116A
Cited
US3969459A
Cited
US4305901A
Cited
DE2344101A1
Cited
US3844091A
Cited
US4033913A
Cited
US4056591A
Cited
US4005162A
Cited
US3943079A
Cited
US3956541A
Cited
US4016232A
Cited
US3956555A
Cited
US4012348A
Cited
US4058580A
Cited
US4250222A
Cited
US4097648A
Cited
US4018722A
Cited
US4045603A
Cited
US4115497A
Cited
US4168251A
Cited
US4071479A
Cited
FR2365019B1
Cited
US4244903A
Cited
US4102106A
Cited
US4263184A
Cited
US4203876A
Cited
US4187352A
Cited
US4145389A
Cited
US4181764A
Cited
US4277428A
Cited
US4508595A
Cited
US4311554A
Cited
US4273688A
Cited
US4202804A
Cited
US4281039A
Cited
US4290988A
Cited
US4440708A
Cited
US4248820A
Cited
FR2445885B1
Cited
US4311621A
Cited
US4239679A
Cited
US4491553A
Cited
US4248743A
Cited
US4481701A
Cited
US4393020A
Cited
US4454091A
Cited
US4323625A
Cited
US4328136A
Cited
US4414267A
Cited
US4376144A
Cited
US4426470A
Cited
GB2104903B
Cited
US4503115A
Cited
US4382108A
Cited
US4791024A
Cited
US4505869A
Cited
US4420351A
Cited
JPS58204049A
Cited
US4455709A
Cited
US4562218A
Cited
JPS59156172A
Cited
US4506037A
Cited
US4594372A
Cited
US4551294A
Cited
US4645631A
Cited
US4597928A
Cited
FR2564374B1
Cited
US4737532A
Cited
US4686251A
Cited
JPS6186042A
Cited
US4610900A
Cited
US4687793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-26 | 2002-04-27 | 2002-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-26 | 2006-04-27 | 2006-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-26 | 2010-04-27 | 2010-10-27 | $7700.00 | Window Closed / Lapsed |