Patent US5932334A successfully refreshed from Google Patents.
US5932334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Advanced polymer wood composite
Assignee: Andersen Corp
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Filing: 1997-11-13
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Granted: 1999-08-03
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Expires: 2017-11-13
Abstract
Abstract The invention relates to a composition or pellet comprising a polyvinyl chloride homopolymer and wood fiber composite that can be used in the form of a linear extrudate or thermoplastic pellet to manufacture structural members. The fiber in the pellet or extrudate is of a particular dimension that lends enhanced modulus to the composition or pellet formed. The extruded pellet comprises a consistent proportion of polymer, wood fiber and water.
Inventors
- 👤 Michael J. Deaner
- 👤 Giuseppe Puppin
- 👤 Kurt E. Heikkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
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: 30
Claim 1
Independent Claim
141 words
A composite thermoplastic pellet, capable of formation into a structural member, which pellet consists essentially of a thermoplastic cylindrical extrudate having a width of about 1 to 5 mm, a length of about 1 to 10 mm; the thermoplastic pellet composition consisting essentially of: (a) a continuous phase comprising a polyvinyl chloride homopolymner; (b) an effective amount of wood fiber having a minimum thickness of 0.1 mm and a minimum aspect ratio of about 1.8 to provide structural properties to the structural member; and (c) less than about 8 wt % water; and wherein the polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and tic wood fiber is dispersed throughout a continuous polyvinyl chloride homopolymer phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 2
Dependent Claim
141 words
A composite thermoplastic pellet, capable of formation into a structural member, which pellet consists essentially of a thermoplastic cylindrical extrudate having a width of about 1 to 5 mm, a length of about 1 to 10 mm; the thermoplastic pellet composition consisting essentially of: (a) a continuous phase comprising a polyvinyl chloride homopolymner; (b) an effective amount of wood fiber having a minimum thickness of 0.1 mm and a minimum aspect ratio of about 1.8 to provide structural properties to the structural member; and (c) less than about 8 wt % water; and wherein the polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and tic wood fiber is dispersed throughout a continuous polyvinyl chloride homopolymer phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 3
Dependent Claim
17 words
The pellet of claim 1 wherein the polyvinyl chloride homopolymer additionally comprises a polyvinyl chloride polymer alloy.
Claim 4
Dependent Claim
18 words
The pellet of claim 1 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 5
Dependent Claim
11 words
The pellet of claim 1 wherein the wood fiber comprises sawdust.
Claim 6
Dependent Claim
13 words
The pellet of claim 1 wherein the composition additionally comprises a compatiblizing agent.
Claim 7
Dependent Claim
17 words
The pellet of claim 1 wherein the polyvinyl chloride homopolymer has a molecular weight of about 90,000±50,000.
Claim 8
Dependent Claim
20 words
The pellet of claim 1 wherein the polyvinyl chloride homopolymer comprises a copolymer having a molecular weight of about 88,000±10,000.
Claim 9
Dependent Claim
37 words
The pellet of claim 1 wherein the wood fiber has a fiber width of about 0.3 to 1.5 mm, a fiber length of about 1 to 10 mm and a aspect ratio of about 2 to 7.
Claim 10
Dependent Claim
18 words
The pellet of claim 1 wherein the water comprises about 0.01 to 5 wt % of the pellet.
Claim 11
Dependent Claim
132 words
A polymer and wood fiber thermoplastic composite capable of formation into a structural member, which composite consists essentially of a thermoplastic cylindrical linear extrudate having a radius of about 1 to 5 mm; the linear thermoplastic extrudate composition consisting essentially of: (a) a continuous phase comprising a polyvinyl chloride homopolymer; (b) an effective amount of wood fiber having a minimum thickness of 0.1 mm and an aspect ratio of about 1.8 to provide structural properties to a composite; (c) less than about 8 wt % water; and wherein the polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and the wood fiber is dispersed throughout a continuous phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 12
Dependent Claim
132 words
A polymer and wood fiber thermoplastic composite capable of formation into a structural member, which composite consists essentially of a thermoplastic cylindrical linear extrudate having a radius of about 1 to 5 mm; the linear thermoplastic extrudate composition consisting essentially of: (a) a continuous phase comprising a polyvinyl chloride homopolymer; (b) an effective amount of wood fiber having a minimum thickness of 0.1 mm and an aspect ratio of about 1.8 to provide structural properties to a composite; (c) less than about 8 wt % water; and wherein the polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and the wood fiber is dispersed throughout a continuous phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 13
Dependent Claim
17 words
The cumposite of claim 10 wherein the polyvinyl chloride homopolymer additionally comprises a polyvinyl chloride polymer alloy.
Claim 14
Dependent Claim
18 words
The composite of claim 10 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 15
Dependent Claim
11 words
The composite of claim 12 wherein the wood fiber comprises sawdust.
Claim 16
Dependent Claim
13 words
The composite of claim 10 wherein the composition additionally comprises a compatibilizing agent.
Claim 17
Dependent Claim
17 words
The composite of claim 10 wherein the polyvinyl chloride homopolyer has a molecular weight of about 95,000±50,000.
Claim 18
Dependent Claim
20 words
The composite of claim 10 wherein the polyvinyl chloride homopolymer comprises a copolymer has a molecular weight of about 88,000±10,000.
Claim 19
Dependent Claim
37 words
The composite of claim 10 wherein the wood fiber has a fiber width of about 0.3 to 1.5 mm, a fiber length of about 1 to 10 mm and a aspect ratio of about 2 to 7.
Claim 20
Dependent Claim
18 words
The composite of claim 10 wherein the water comprises about 0.01 to 5 wt % of the pellet.
Claim 21
Dependent Claim
144 words
A thermoplastic composite composition, capable of extrusion into a dimensionally stable structural member, which consists essentially of a thermoplastic composition which comprises: (a) a continuous phase comprising a polyvinyl chloride homopolymer; (b) an effective amount of wood fiber having a minimum width of 0.1 mm and an aspect ratio of greater than about 1.8 to provide structural properties to the composite; (c) about 0.01 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 polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and the wood fiber is dispersed throughout the continuous thermoplastic polyvinyl chloride homopolymer phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 22
Dependent Claim
144 words
A thermoplastic composite composition, capable of extrusion into a dimensionally stable structural member, which consists essentially of a thermoplastic composition which comprises: (a) a continuous phase comprising a polyvinyl chloride homopolymer; (b) an effective amount of wood fiber having a minimum width of 0.1 mm and an aspect ratio of greater than about 1.8 to provide structural properties to the composite; (c) about 0.01 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 polyvinyl chloride homopolymer and wood fiber are mixed at elevated temperature and pressure such that an intimate admixture is formed and the wood fiber is dispersed throughout the continuous thermoplastic polyvinyl chloride homopolymer phase and the composite has a Young's modulus of at least about 600,000 psi.
Claim 23
Dependent Claim
13 words
The composition of claim 19 wherein the polymer comprises a polyvinyl chloride homopolymer.
Claim 24
Dependent Claim
14 words
The composition of claim 19 wherein the polymer comprises a polyvinyl chloride polymer alloy.
Claim 25
Dependent Claim
18 words
The composition of claim 19 wherein the wood fiber comprises a by-product of milling or sawing wooden members.
Claim 26
Dependent Claim
11 words
The composition of claim 19 wherein the wood fiber comprises sawdust.
Claim 27
Dependent Claim
15 words
The composition of claim 20 wherein the polymer has a molecular weight of about 95,000±50,000.
Claim 28
Dependent Claim
18 words
The composition of claim 21 wherein the polymer comprises a copolymer having a molecular weight of about 88,000±10,000.
Claim 29
Dependent Claim
37 words
The composition of claim 19 wherein ther wood fiber has a fiber width of about 0.3 to 1.5 mm, a fiber length of about 1 to 10 mm and a aspect ratio of about 2 to 7.
Claim 30
Dependent Claim
17 words
The composition of claim 19 wherein water comprises about 0.01 to 3.5 wt % of the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-02 | 2003-02-01 | 2003-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-02 | 2007-02-01 | 2007-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-02 | 2011-02-01 | 2011-08-03 | $7700.00 | Window Closed / Lapsed |