US4770912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene resin blend
Assignee: Union Camp Corp
•
Filing: 1987-07-23
•
Granted: 1988-09-13
•
Expires: 2007-07-23
Abstract
Abstract A polyethylene resin blend is made up from high molecular weight high density polyethylene resin, a linear low density polyethylene resin, and a very low density polyethylene resin. The blend is useful to fabricate films characterized in part by a softness with relatively high strength.
Inventors
- 👤 William W. Furrer
- 👤 Ajit K. Bose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/08; C08L23/0807; C08L23/0815; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A thermoplastic resin blend, which comprises; (A) about 30 to 70 weight percent of a high molecular weight polyethylene resin having a density of at least 0.95 gms/ml and a fractional melt index of from 0.05-0.8. (B) about 20 to 40 weight percent of a linear low density polyethylene resin having a density of 0.91 to 0.93 gms/ml and a melt index of less than 2.0; and (C) about 10 to 30 weight percent of a very low density polyethylene resin having a density of less than 0.91 gms/ml and a melt index of 0.8 to 1.1.
Claim 2
Dependent Claim
97 words
A thermoplastic resin blend, which comprises; (A) about 30 to 70 weight percent of a high molecular weight polyethylene resin having a density of at least 0.95 gms/ml and a fractional melt index of from 0.05-0.8. (B) about 20 to 40 weight percent of a linear low density polyethylene resin having a density of 0.91 to 0.93 gms/ml and a melt index of less than 2.0; and (C) about 10 to 30 weight percent of a very low density polyethylene resin having a density of less than 0.91 gms/ml and a melt index of 0.8 to 1.1.
Claim 3
Dependent Claim
41 words
The blend of claim 1 wherein there is about 50 weight percent of the high molecular weight polyethylene resin, about 30 weight percent of the linear low density polyethylene resin and about 20 weight percent of very low density polyethylene resin.
Claim 4
Dependent Claim
40 words
The blend of claim 1 wherein there is about 50 weight percent of the high molecular weight polyethylene resin, about 40 percent of the linear low density polyethylene resin, and about 10 percent of the very low density polyethylene resin.
Claim 5
Dependent Claim
11 words
A thermoplastically extruded film of the resin blend of claim 1.
Claim 6
Dependent Claim
10 words
A bag-type container fabricated from the blend of claim 1.
References Cited (Backward Citations)
US3998914A
Cited
US4303710A
Cited
US4330639A
Cited
US4335224A
Cited
EP0052555A2
Cited
US4346834A
Cited
JPS5859242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |