US4844987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide molding material and hollow-molded body obtained therefrom
Assignee: Teijin Ltd
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Filing: 1986-10-28
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Granted: 1989-07-04
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Expires: 2006-10-28
Abstract
Abstract A material for forming a hollow-molded body, which comprises a polyamide comprising hexamethylene isophthalamide units as the main recurring units. A hollow-molded body having an excellent gas barrier property can be obtained by using this polyamide molding material alone or in combination with polyethylene terephthalate.
Inventors
- 👤 Masahiko Hirose
- 👤 Takatoshi Kuratsuji
- 👤 Tooru Matsubayashi
- 👤 Kouichi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:04
CPC Classifications
B; B32; B32B; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/08; B32B27/34; B32B27/36; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; B32B2307/00; B32B2307/50; B32B2307/514; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31786
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A drawn hollow-molded body having improved gas barrier properties having a multi-layer structure comprising at least one layer composed of polyamide material including at least 50 mole % hexamethylene isophthalamide recurring units and at least one layer composed of polyethylene terephthalate wherein the polyamide layer comprises about 5 to 50% by weight of said hollow molded body.
Claim 2
Dependent Claim
57 words
A drawn hollow-molded body having improved gas barrier properties having a multi-layer structure comprising at least one layer composed of polyamide material including at least 50 mole % hexamethylene isophthalamide recurring units and at least one layer composed of polyethylene terephthalate wherein the polyamide layer comprises about 5 to 50% by weight of said hollow molded body.
Claim 3
Dependent Claim
33 words
A molded body as set forth in claim 1, wherein the content of the ethylene terephthalate units in the polyethylene terephthalate is at least 80 mole % based on the total recurring units.
Claim 4
Dependent Claim
21 words
A molded body as set forth in claim 1, wherein the inherent viscosity of the polyethylene terephthalate is at least 0.5.
Claim 5
Dependent Claim
40 words
A molded body as set forth in claim 1, which has a multi-layer structure including 2 to 5 layers, wherein the polyethylene terephthalate layer constitutes an inner layer and the polyamide layer constitutes an outer layer or an intermediate layer.
Claim 6
Dependent Claim
22 words
A molded body as set forth in claim 1 wherein the polyamide material is at least 80 mole % hexamethylene isophthalamide units.
Claim 7
Dependent Claim
21 words
A molded body as set forth in claim 1 wherein the intrinsic viscosity of the polyamide material is at least 0.5.
Claim 8
Dependent Claim
22 words
The multi-layer drawn hollow-molded body of claim 1 wherein the polyamide layer comprises 10 to 30% by weight of said hollow-molded body.
Claim 9
Dependent Claim
57 words
An oriented hollow-molded body having improved gas barrier properties composed of a resin composition comprising a polyamide material including at least 50 mole % hexamethylene isophthalamide recurring units and polyethylene terephthalate wherein the polyamide material is incorporated in an amount of about 1 to 100 parts by weight per hundred parts by weight of the polyethylene terephthalate.
Claim 10
Dependent Claim
57 words
An oriented hollow-molded body having improved gas barrier properties composed of a resin composition comprising a polyamide material including at least 50 mole % hexamethylene isophthalamide recurring units and polyethylene terephthalate wherein the polyamide material is incorporated in an amount of about 1 to 100 parts by weight per hundred parts by weight of the polyethylene terephthalate.
Claim 11
Dependent Claim
32 words
A molded body as set forth in claim 8, wherein the content of ethylene terephthalate units in the polyethylene terephthalate is at least 80 mole % based on the total recurring units.
Claim 12
Dependent Claim
21 words
A molded body as set forth in claim 8, wherein the inherent viscosity of the polyethylene terephthalate is at least 0.5.
Claim 13
Dependent Claim
22 words
A molded body as set forth in claim 8 wherein the polyamide material is at least 80 mole % hexamethylene isophthalamide units.
Claim 14
Dependent Claim
21 words
A molded body as set forth in claim 8 wherein the intrinsic viscosity of the polyamide material is at least 0.5.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |