US4554202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging cloth
Assignee: TAISEI POLYMER Co Ltd A CORP OF JAPAN
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Filing: 1984-07-06
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Granted: 1985-11-19
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Expires: 2004-07-06
Abstract
Abstract A packing cloth comprising a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft, thread or tape obtained by melt extrusion of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C. This packaging cloth has an improved tear strength and notch propagation resistance.
Inventors
- 👤 Ryosuke Kamei
- 👤 Keiitsu Kobayashi
- 👤 Akira Nakamura
- 👤 Toshikazu Shimamura
- 👤 Masamitsu Tsukada
- 👤 Hisashi Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0633; B29C61/0658; B32B27/30; B32B27/304; B32B27/32; B32B5/00; B32B5/02; B32B5/024; B32B5/026; D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4471; G02B6/4476; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; B32B2309/00; B32B2309/02; B32B2323/00; B32B2323/04; B32B2323/046; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T442/00; Y10T442/30; Y10T442/3033; Y10T442/3041; Y10T442/3472; Y10T442/3602; Y10T442/365; Y10T442/3854; Y10T442/3886; Y10T442/40; Y10T442/488; Y10T442/60; Y10T442/674; Y10T442/678
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A packaging cloth comprising a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C.
Claim 2
Dependent Claim
84 words
A packaging cloth comprising a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C.
Claim 3
Dependent Claim
83 words
A packaging cloth as claimed in claim 1, wherein the thread or tape is that obtained by melt extrusion of (A) 25 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain and (B) 10 to 75 parts by weight of a high-density ethylene polymer haing a density of not less than 0.945 g/cm 3 , followed by stretching at a temperature of less than 120° C.
Claim 4
Dependent Claim
60 words
A packaging cloth as claimed in claim 1, wherein the thread or tape is that obtained by melt extrusion of (A) 20 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain and (C) 10 to 80 parts by weight of a propylene polymer.
Claim 5
Dependent Claim
105 words
A packaging cloth comprising a laminate of a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C., said laminate being produced by laminating the woven or knitted fabric onto both surfaces of an intermediate layer.
Claim 6
Dependent Claim
105 words
A packaging cloth comprising a laminate of a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C., said laminate being produced by laminating the woven or knitted fabric onto both surfaces of an intermediate layer.
Claim 7
Dependent Claim
83 words
A packaging cloth as claimed in claim 4, wherein the thread or tape is that obtained by melt extrusion of (A) 25 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a brached short chain and (B) 10 to 75 parts by weight of a high-density ethylene polymer having a density of not less than 0.945 g/cm 3 , followed by stretching at a temperature of less than 120° C.
Claim 8
Dependent Claim
60 words
A packaging cloth as claimed in claim 4, wherein the thread or tape is that obtained by melt extrusion of (A) 20 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain and (C) 10 to 80 parts by weight of a propylene polymer.
Claim 9
Dependent Claim
118 words
A packaging cloth comprising a laminate of a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C., said laminate being produced by laminating the woven or knitted fabric onto one surface of a film having heat shrinkability identical or similar to that of the woven or knitted fabric.
Claim 10
Dependent Claim
118 words
A packaging cloth comprising a laminate of a woven or knitted fabric obtained by using, as at least a portion of either or both of warp and weft for a woven fabric or at least a portion of either or both of wales and courses for a knitted fabric, thread or tape obtained by melt extrusion of linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain, followed by stretching at a temperature of less than 120° C., said laminate being produced by laminating the woven or knitted fabric onto one surface of a film having heat shrinkability identical or similar to that of the woven or knitted fabric.
Claim 11
Dependent Claim
83 words
A packaging cloth as claimed in claim 7, wherein the thread or tape is that obtained by melt extrusion of (A) 25 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain and (B) 10 to 75 parts by weight of a high-density ethylene polymer having a density of not less than 0.945 g/cm 3 , followed by stretching at a temperature of less than 120° C.
Claim 12
Dependent Claim
60 words
A packaging cloth as claimed in claim 7, wherein the thread or tape is that obtained by melt extrusion of (A) 20 to 90 parts by weight of a linear low-density ethylene polymer having a density of less than 0.945 g/cm 3 and having a branched short chain and (C) 10 to 80 parts by weight of a propylene polymer.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |