Patent US4479989A successfully refreshed from Google Patents.
US4479989A
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Flexible container material
Assignee: Bayer Corp
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Filing: 1982-12-02
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Granted: 1984-10-30
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Expires: 2002-12-02
Abstract
Abstract Film material for use in sterilized medical solution containers such as blood bags or I.V. bags, comprising 30-90% linear low density polyethylene (LLDPE) and 10-70% styrene-ethylene-butylene-styrene (SEBS). The particular LLDPE and SEBS materials are selected from among known LLDPE and SEBS materials according to density, in the case of LLDPE, and styrene/rubber ratio and composition in the case of SEBS. Up to 10% of an optional third component such as high melt index LLDPE or polypropylene may be added as a processing aid. Material having greater than 50% LLDPE is particularly well suited for medical solution container application.
Inventors
- 👤 Mohan S. Mahal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/14; A61J1/1475; B; B65; B65B; B65B55/00; B65B55/02; B65B55/04; B65B55/08; B65B55/10; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L53/00; C08L53/02; C08L53/025; A61J1/10; A61M; A61M2207/00; C08L2203/00; C08L2203/02; C08L23/10; C08L23/12; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A flexible film material, comprising: (a) a first component of 30-90% linear low density polyethylene material having a density of 0.918-0.940 g/cm 3 and a melting point less than 125° C.; (b) a second component of 10-70% of styrene-ethylenebutylene-styrene block copolymer; (c) said components being selected and proportioned so that a flexible film container may be manufactured therefrom and sterilized at temperatures up to 120° C.
Claim 2
Dependent Claim
66 words
A flexible film material, comprising: (a) a first component of 30-90% linear low density polyethylene material having a density of 0.918-0.940 g/cm 3 and a melting point less than 125° C.; (b) a second component of 10-70% of styrene-ethylenebutylene-styrene block copolymer; (c) said components being selected and proportioned so that a flexible film container may be manufactured therefrom and sterilized at temperatures up to 120° C.
Claim 3
Dependent Claim
23 words
A container formed from material as defined in claim 1, comprising a spike port, a medicinal entry port, and an air impermeable overwrap.
Claim 4
Dependent Claim
24 words
The container of claim 2 wherein said spike port and medicinal entry port are formed of essentially the same material as the film material.
Claim 5
Dependent Claim
15 words
The material of claim 1 wherein said first component makes up 70-80% of said film.
Claim 6
Dependent Claim
15 words
The material of claim 1 wherein said second component makes up 20-50% of said film.
Claim 7
Dependent Claim
19 words
The material of claim 6 wherein said first component has a Vicat softening point in excess of 90° C.
Claim 8
Dependent Claim
66 words
A flexible film material consisting essentially of: (a) a first component of 30-90% linear low density polyethylene material having a density of 0.918-0.940 g/cm 3 and a melting point less than 125° C.; (b) a second component of 10-70% of styrene-ethylene-butylene-styrene block copolymer; and (c) a third component of 1-10% of polyolefin having an MI of 5-50, being heat sterilizable at temperatures up to 120° C.
Claim 9
Dependent Claim
66 words
A flexible film material consisting essentially of: (a) a first component of 30-90% linear low density polyethylene material having a density of 0.918-0.940 g/cm 3 and a melting point less than 125° C.; (b) a second component of 10-70% of styrene-ethylene-butylene-styrene block copolymer; and (c) a third component of 1-10% of polyolefin having an MI of 5-50, being heat sterilizable at temperatures up to 120° C.
Claim 10
Dependent Claim
16 words
The material of claim 7 wherein said first component makes up 45-62% of said film material.
Claim 11
Dependent Claim
16 words
The material of claim 7 wherein said second component makes up 20-50% of said film material.
Claim 12
Dependent Claim
22 words
A container formed from the material of claim 1, comprising a spike port, a medicinal entry port, and an air impermeable overwrap.
Claim 13
Dependent Claim
19 words
The material of claim 7 wherein said first component is further characterized by a melt index of 0.1 -5.
Claim 14
Dependent Claim
14 words
The material of claim 7 wherein said third component is linear low density polyethylene.
Claim 15
Dependent Claim
11 words
The material of claim 7 wherein said third component is polypropylene.
Claim 16
Dependent Claim
80 words
A flexible film material consisting essentially of: (a) a first component of linear low density polyethylene having a density of 0.918-0.940 g/cm 3 and a melting point of less than 125° C.; (b) a second component of styrene-ethylene-butylene-styrene block copolymer being substantially free of additives and having a styrene to rubber ratio of 25-35/65-75; and (c) 0-10% of a third component having a melt index of 5-50 and selected from the group consisting of linear low density polyethylene and polypropylene.
Claim 17
Dependent Claim
80 words
A flexible film material consisting essentially of: (a) a first component of linear low density polyethylene having a density of 0.918-0.940 g/cm 3 and a melting point of less than 125° C.; (b) a second component of styrene-ethylene-butylene-styrene block copolymer being substantially free of additives and having a styrene to rubber ratio of 25-35/65-75; and (c) 0-10% of a third component having a melt index of 5-50 and selected from the group consisting of linear low density polyethylene and polypropylene.
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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |