US4829096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathable film and process for production of the same
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1987-07-16
•
Granted: 1989-05-09
•
Expires: 2007-07-16
Abstract
Abstract A breathable film and a process for producing the same are disclosed, the breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 ANGSTROM ; (2) from 50 to 400 parts by weight of a filler; and optionally, (3) from 0.5 to 8 parts by weight of a nonionic surface active agent. The breathable film of the invention not only has excellent film moldability and film stretchability but also shows high breathability, good touch and appearance, and high strength.
Inventors
- 👤 Shuji Kitamura
- 👤 Kiyohiko Nakae
- 👤 Kozo Kotani
- 👤 Takanori Kume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C55/00; B29C55/005; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2995/00; B29K2995/0037; B29K2995/0065; B29K2995/0068; B29K2995/0069; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
75 words
A breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; and (2) from 50 to 400 parts by weight of a filler.
Claim 2
Dependent Claim
75 words
A breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; and (2) from 50 to 400 parts by weight of a filler.
Claim 3
Dependent Claim
89 words
A breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; (2) from 50 to 400 parts by weight of a filler; and (3) from 0.5 to 8 parts by weight of a nonionic surface active agent.
Claim 4
Dependent Claim
89 words
A breathable film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; (2) from 50 to 400 parts by weight of a filler; and (3) from 0.5 to 8 parts by weight of a nonionic surface active agent.
Claim 5
Dependent Claim
157 words
A process for producing a breathable film comprising uniaxially stretching a film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; and (2) from 50 to 400 parts by weight of a filler, at a temperature of from 30° to 80° C. at a stretch ratio of from 1.2 to 8 in the mechanical direction, or biaxially stretching said film at a temperature of from 40° to 100° C. at a stretch ratio of from 1.1 to 8.0 in the mechanical direction and then at a temperature of from 70° to 100° C. at a stretch ratio of not higher than 6.0 in the transverse direction.
Claim 6
Dependent Claim
157 words
A process for producing a breathable film comprising uniaxially stretching a film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; and (2) from 50 to 400 parts by weight of a filler, at a temperature of from 30° to 80° C. at a stretch ratio of from 1.2 to 8 in the mechanical direction, or biaxially stretching said film at a temperature of from 40° to 100° C. at a stretch ratio of from 1.1 to 8.0 in the mechanical direction and then at a temperature of from 70° to 100° C. at a stretch ratio of not higher than 6.0 in the transverse direction.
Claim 7
Dependent Claim
171 words
A process for producing a breathable film comprising uniaxially stretching a film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; (2) from 50 to 400 parts by weight of a filler; and (3) from 0.5 to 8 parts by weight of a nonionic surface active agent at a temperature of from 30° to 80° C. at a stretch ratio of from 1.2 to 8 in the mechanical direction, or biaxially stretching said film at a temperature of from 40° to 100° C. at a stretch ratio of from 1.1 to 8.0 in the mechanical direction and then at a temperature of from 70° to 100° C. at a stretch ratio of not higher than 6.0 in the transverse direction.
Claim 8
Dependent Claim
171 words
A process for producing a breathable film comprising uniaxially stretching a film comprising a resin composition comprising (1) 100 parts by weight of a linear low-density polyethylene resin having a density of from 0.870 to 0.915 g/cm 3 and containing from 15 to 50% by weight of a component which is extractable with xylene at room temperature and which has a weight average molecular chain length of from 1,000 to 9,000 Å; (2) from 50 to 400 parts by weight of a filler; and (3) from 0.5 to 8 parts by weight of a nonionic surface active agent at a temperature of from 30° to 80° C. at a stretch ratio of from 1.2 to 8 in the mechanical direction, or biaxially stretching said film at a temperature of from 40° to 100° C. at a stretch ratio of from 1.1 to 8.0 in the mechanical direction and then at a temperature of from 70° to 100° C. at a stretch ratio of not higher than 6.0 in the transverse direction.
Claim 9
Dependent Claim
31 words
A breathable film as in claim 1, wherein said linear low-density polyehtylene resin contains from 20 to 30% by weight of a component which is extractable with xylene at room temperature.
Claim 10
Dependent Claim
31 words
A breathable film as in claim 2, wherein said linear low-density polyethylene resin contains from 20 to 30% by weight of a component which is extractable with xylene at room temperature.
Claim 11
Dependent Claim
30 words
A process as in claim 3, wherein said linear low-density polyehtylene resin contains from 20 to 30% by weight of a component which is extractable with xylene at room temperature.
Claim 12
Dependent Claim
30 words
A process as in claim 4, wherein said linear low-density polyethylene resin contains from 20 to 30% by weight of a component which is extractable with xylene at room temperature.
Claim 13
Dependent Claim
34 words
A breathable film as in claim 1, wherein said resin composition contains from 60 to 200 parts by weight of said filler based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 14
Dependent Claim
34 words
A breathable film as in claim 2, wherein said resin composition contains from 60 to 200 parts by weight of said filler based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 15
Dependent Claim
33 words
A process as in claim 3, wherein said resin composition contains from 60 to 200 parts by weight of said filler based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 16
Dependent Claim
33 words
A process as in claim 4, wherein said resin composition contains from 60 to 200 parts by weight of said filler based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 17
Dependent Claim
37 words
A breathable film as in claim 2, wherein said resin composition contains from 0.5 to 2 parts by weight of said nonionic surface active agent based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 18
Dependent Claim
36 words
A process as in claim 4, wherein said resin composition contains from 0.5 to 2 parts by weight of said nonionic surface active agent based on 100 parts by weight of said linear low-density polyethylene resin.
Claim 19
Dependent Claim
34 words
A process as in claim 3, wherein the uniaxial stretching is carried out at a temperature of from 40° to 60° C. at a stretch ratio from 1.6 to 2.5 in the mechanical direction.
Claim 20
Dependent Claim
34 words
A process as in claim 4, wherein the uniaxial stretching is carried out at a temperature of from 40° to 60° C. at a stretch ratio from 1.6 to 2.5 in the mechanical direction.
Claim 21
Dependent Claim
60 words
A process as in claim 3, wherein the biaxial stretching is carried out first at a temperature of from 50° to 85° C. at a stretch ratio of from 1.2 to 4.0 in the mechanical direction and then at a temperature of from 80° to 95° C. at a stretch ratio of not higher than 3.0 in the transverse direction.
Claim 22
Dependent Claim
60 words
A process as in claim 4, wherein the biaxial stretching is carried out first at a temperature of from 50° to 85° C. at a stretch ratio of from 1.2 to 4.0 in the mechanical direction and then at a temperature of from 80° to 95° C. at a stretch ratio of not higher than 3.0 in the transverse direction.
Claim 23
Dependent Claim
17 words
A breathable film as in claim 1, wherein said filler is calcium carbonate, barium sulfate, or talc.
Claim 24
Dependent Claim
17 words
A breathable film as in claim 2, wherein said filler is calcium carbonate, barium sulfate, or talc.
Claim 25
Dependent Claim
16 words
A process as in claim 3, wherein said filler is calcium carbonate, barium sulfate, or talc.
Claim 26
Dependent Claim
16 words
A process as in claim 4, wherein said filler is calcium carbonate, barium sulfate, or talc.
Claim 27
Dependent Claim
52 words
A process as in claim 3, wherein the resulting breathable film is subjected to a heat setting treatment at a temperature of from 60° C. to a temperature of 5° C. lower than the maximum peak temperature of the linear low-density polyethylene as determined by the use of a differential scanning calorimeter.
Claim 28
Dependent Claim
52 words
A process as in claim 4, wherein the resulting breathable film is subjected to a heat setting treatment at a temperature of from 60° C. to a temperature of 5° C. lower than the maximum peak temperature of the linear low-density polyethylene as determined by the use of a differential scanning calorimeter.
Claim 29
Dependent Claim
21 words
A breathable film as in claim 1, wherein said filler has an average particle diameter of from 0.1 to 20 μm.
Claim 30
Dependent Claim
21 words
A breathable film as in claim 2, wherein said filler has an average particle diameter of from 0.1 to 20 μm.
Claim 31
Dependent Claim
20 words
A process as in claim 3, wherein said filler has an average particle diameter of from 0.1 to 20 μm.
Claim 32
Dependent Claim
20 words
A process as in claim 4, wherein said filler has an average particle diameter of from 0.1 to 20 μm.
Claim 33
Dependent Claim
19 words
A breathable film as in claim 2, wherein said nonioic surface active agent is monoglycerine monostearate or diglycerine distearate.
Claim 34
Dependent Claim
18 words
A process as in claim 4, wherein said nonioic surface active agent is monoglycerine monostearate or diglycerine distearate.
References Cited (Backward Citations)
GB1044502A
Cited
GB1101950A
Cited
JPS5726534A
Cited
US4452845A
Cited
US4472328A
Cited
JPS5815538A
Cited
JPS58149303A
Cited
JPS58149925A
Cited
JPS5962117A
Cited
JPS59122533A
Cited
US4705813A
Cited
US4705812A
Cited
JPS60215034A
Cited
JPS60229731A
Cited
JPS60230825A
Cited
JPS6179620A
Cited
US4678813A
Cited
US4699733A
Cited
EP0227481A2
Cited
EP0253667A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |