US4783507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polyethylene synthetic pulp
Assignee: Mitsui Chemicals Inc
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Filing: 1984-09-12
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Granted: 1988-11-08
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Expires: 2004-09-12
Abstract
Abstract Disclosed is a novel polyethylene synthetic pulp giving synthetic paper which may be heat-treated with a heating apparatus attached to a conventional papermaking machine. The polyethylene synthetic pulp comprises fibers of polyethylene which has an MFR (Melt Flow Ratio) of 0.1 to 3,000 g/10 min., and the portion with a low melting point thereof, which melts at a temperature of 95 DEG C. or lower when measured with a DSC (Differential Scanning Calorimeter), is at least 20% by weight, preferably, 40% to 70%.
Inventors
- 👤 Teruo Tokunaga
- 👤 Masahiro Sugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D21H5/202; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D21H13/00; D21H13/10; D21H13/12; D21H13/14; Y; Y10; Y10S; Y10S264/00; Y10S264/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
A novel polyethylene synthetic pulp comprising fibers of polyethylene having an MFR, Melt Flow Ratio, of 0.5 to 500 g/10 min. and at least 20% by weight of said polyethylene fibers having a low melting point which melts at a temperature of 95° C. or lower when measured with a DSC, Differential Scanning Calorimeter, the remainng portion, if any, being less than 80% by weight of the synthetic pulp, having a higher melting point than 95° C. when meansured with a DSC.
Claim 2
Dependent Claim
82 words
A novel polyethylene synthetic pulp comprising fibers of polyethylene having an MFR, Melt Flow Ratio, of 0.5 to 500 g/10 min. and at least 20% by weight of said polyethylene fibers having a low melting point which melts at a temperature of 95° C. or lower when measured with a DSC, Differential Scanning Calorimeter, the remainng portion, if any, being less than 80% by weight of the synthetic pulp, having a higher melting point than 95° C. when meansured with a DSC.
Claim 3
Dependent Claim
26 words
A novel polyethylene synthetic pulp according to claim 1, wherein the polyethylene and the portion with a low melting point is 40% to 70% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |