US4647497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite nonwoven sheet
Assignee: EIDP Inc
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Filing: 1985-06-07
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Granted: 1987-03-03
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Expires: 2005-06-07
Abstract
Abstract A composite nonwoven sheet is provided having a polyolefin synthetic pulp layer, optionally containing woodpulp and adhesive binder, is adhered by adhesive binder to a continuous filament scrim. The pulp surface of the composite has unexpectedly high abrasion resistance.
Inventors
- 👤 Gregory P. Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; B32B7/00; B32B7/04; B32B7/12; D; D21; D21H; D21H27/00; D21H13/00; D21H13/10; D21H13/12; D21H13/14; D21H21/00; D21H21/14; D21H21/16; Y; Y10; Y10T; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/197
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
42 words
A calendered composite nonwoven sheet comprising a nonwoven continuous filament scrim and an abrasion resistant pulp layer comprising at least 50% by weight of polyolefin synthetic pulp, the scrim and the pulp layer being adhered to each other by an adhesive binder.
Claim 2
Dependent Claim
42 words
A calendered composite nonwoven sheet comprising a nonwoven continuous filament scrim and an abrasion resistant pulp layer comprising at least 50% by weight of polyolefin synthetic pulp, the scrim and the pulp layer being adhered to each other by an adhesive binder.
Claim 3
Dependent Claim
25 words
A composite sheet of claim 1 wherein the pulp layer contains woodpulp amounting to no more than 50% by total weight of the pulp layer.
Claim 4
Dependent Claim
19 words
A composite sheet of claim 2 wherein the woodpulp amounts to no more than 30% of the pulp layer.
Claim 5
Dependent Claim
19 words
A composite sheet of claim 2 wherein the woodpulp amounts to no more than 10% of the pulp layer.
Claim 6
Dependent Claim
27 words
A composite sheet of claim 1 wherein the pulp layer contains an adhesive binder amounting to no more than 20% by total weight of the pulp layer.
Claim 7
Dependent Claim
26 words
A composite sheet of claim 5 wherein the pulp layer contains an adhesive binder amounting to no more than 10% by weight of the pulp layer.
Claim 8
Dependent Claim
25 words
A composite sheet of claim 1 wherein the scrim includes an adhesive binder amounting to no more than 10% by total weight of the scrim.
Claim 9
Dependent Claim
26 words
A composite sheet of claim 7 wherein the amount of the adhesive binder is in the range of 3 to 8% by weight of the scrim.
Claim 10
Dependent Claim
104 words
A calendered composite nonwoven sheet comprising a nonwoven scrim of continuous filaments of synthetic organic polymer adhered by an adhesive binder to an abrasion-resistant pulp layer comprising a polyolefin synthetic pulp, the scrim weighing in the range of 15 to 85 g/m 2 and containing an adhesive binder in an amount in the range of 3 to 8% by total weight of the scrim, and the pulp layer weighing in the range of 15 to 70 g/m 2 and comprising by total weight of the layer at least 70% polyolefin synthetic pulp, no more than 30% woodpulp and no more than 20% adhesive binder.
Claim 11
Dependent Claim
104 words
A calendered composite nonwoven sheet comprising a nonwoven scrim of continuous filaments of synthetic organic polymer adhered by an adhesive binder to an abrasion-resistant pulp layer comprising a polyolefin synthetic pulp, the scrim weighing in the range of 15 to 85 g/m 2 and containing an adhesive binder in an amount in the range of 3 to 8% by total weight of the scrim, and the pulp layer weighing in the range of 15 to 70 g/m 2 and comprising by total weight of the layer at least 70% polyolefin synthetic pulp, no more than 30% woodpulp and no more than 20% adhesive binder.
Claim 12
Dependent Claim
97 words
A calendered composite sheet of claim 9 particularly suited for use as a house air infiltration barrier, the scrim weighing in the range of 25 to 50 g/m 2 , the pulp layer weighing in the range 15 to 30 g/m 2 and having a woodpulp content in the range of 3 to 10%, and the composite sheet having a strip tensile strength of at least 25 Newtons, a grab tensile strength of at least 75 Newtons, a hydrostatic head of at least 25 cm, and a moisture vapor transport of at least 400 g/m 2 /day.
Claim 13
Dependent Claim
85 words
A calendered composite sheet of claim 9 particularly suited for outdoor signs and banners, having the scrim weighing in the range 30 to 60 g/m 2 , the pulp layer weighing in the range of 20 to 40 g/m 2 and having a woodpulp content in the range of 3 to 30% and the composite sheet has a grab tensile strength of at least 75 Newtons, an Elmendorf tear strength of at least 5 Newtons and a Mullen burst strength of at least 125 kiloPascals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |