US4342807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low density matting and process
Assignee: Akzona Inc
•
Filing: 1980-02-04
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Granted: 1982-08-03
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Expires: 2000-02-04
Abstract
Abstract A low density matting structure of improved transverse strength obtained by vertically laying continuous melt-spun thermoplastic macrofilaments (diameter=0.1-1.5 mm) onto a horizontally moving profiled support in overlapping rows of irregularly looped filaments to form a peak and valley three-dimensional structure undulating in its longitudinal and/or transverse direction. The matting articles consist essentially of the melt-spun filaments which are self-bonded or fused at random points of intersection without using any bonding agent or reinforcing inserts, and the resulting matting is especially distinguished by a high transverse strength per unit of surface weight of at least 2 Nm/g and preferably 4 Nm/g.
Inventors
- 👤 Alfred Rasen
- 👤 Rolf Vollbrecht
- 👤 Klemens Schenesse
- 👤 Joachim Behnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:20
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/005; D04H3/009; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; D04H3/007; D04H3/011; D04H3/08; D04H3/16; B01D2239/00; B01D2239/04; B01D2239/0407; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/12; B01D2239/1291; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24678; Y10T428/24694; Y10T428/249921; Y10T428/249922; Y10T442/00; Y10T442/60; Y10T442/68; Y10T442/69
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A low density matting article consisting essentially of a plurality of continuous melt-spun synthetic polymer filaments of a diameter of about 0.1 to 0.5 mm. laid in overlapping rows of irregularly looped and intermingled filaments to form, in the aggregate, a peak and valley three-dimensional structure undulating in the longitudinal and/or transverse directions of the matting, the individual filaments in said matting being self-bonded at random points of intersection and having a number of transversely directed loops sufficient to provide a transverse strength per unit of surface weight of at least 2 Nm/g.
Claim 2
Dependent Claim
93 words
A low density matting article consisting essentially of a plurality of continuous melt-spun synthetic polymer filaments of a diameter of about 0.1 to 0.5 mm. laid in overlapping rows of irregularly looped and intermingled filaments to form, in the aggregate, a peak and valley three-dimensional structure undulating in the longitudinal and/or transverse directions of the matting, the individual filaments in said matting being self-bonded at random points of intersection and having a number of transversely directed loops sufficient to provide a transverse strength per unit of surface weight of at least 2 Nm/g.
Claim 3
Dependent Claim
22 words
A matting article as claimed in claim 1 wherein the transverse strength per unit of surface weight is at least 4 Nm/g.
Claim 4
Dependent Claim
28 words
A matting article as claimed in claim 1 consisting essentially of nylon filaments and having a transverse strength per unit of surface weight of at least 7 Nm/g.
Claim 5
Dependent Claim
22 words
A matting article as claimed in claim 3 wherein the transverse strength per unit of surface weight is at least 10 Nm/g.
Claim 6
Dependent Claim
24 words
A matting article as claimed in claim 1 wherein the matting structure undulates in both longitudinal and transverse directions to provide a waffle-like appearance.
Claim 7
Dependent Claim
34 words
A matting article as claimed in claim 1 wherein the filaments have a diameter of about 0.2 to 1 mm. and the transverse strength per unit of surface weight is at least 4 Nm/g.
Claim 8
Dependent Claim
13 words
A matting article as claimed in claim 6 consisting essentially of polycaprolactam filaments.
Claim 9
Dependent Claim
22 words
A matting article as claimed in claim 1 in which the filaments are at least partly crystalline in their internal molecular structure.
Claim 10
Dependent Claim
18 words
A matting article as claimed in claim 1 having a density of less than 0.05 g/cm 3 .
Claim 11
Dependent Claim
18 words
A matting article as claimed in claim 1 having a density of less than 0.04 g/cm 3 .
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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) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |