EP0457905A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Extensible non-woven fabric and its production method
Assignee: Asahi Kasei Corp
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Filing: 1989-12-25
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Granted: —
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Expires: 2009-12-25
Abstract
Abstract This invention relates to an extensible non-woven fabric and its production method, which non-woven fabric uses, as its raw material, a hydrogenated block copolymer comprising a polymer block A consisting primarily of a vinyl aromatic compound and a polymer block B consisting primarily of a conjugated diene compound, at least one said polymer block B being prepared by hydrogenating a block copolymer at the terminal of the polymer chain. Spinnability and non-woven fabric characteristics can be further improved by adding polyolefin to the raw material described above. The resulting extensible non-woven fabric has high strength, stretch characteristics (elongation, elongation recovery) and weatherability, and can be applied to a wide range of applications by utilizing its characteristics.
Inventors
- 👤 Kohichi Shohji
- 👤 Masataka Ikeda
- 👤 Yasushi Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4382; D04H3/00; D04H3/08; D04H3/16; D04H1/4282; D04H1/4291; D04H1/54; D04H1/541; D04H3/005; D04H3/007; D04H3/016
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
98 words
A stretchable nonwoven fabric composed of a thermal plastic fiber manufactured from a hydrogenated block copolymer obtained by hydrogenating a block copolymer including at least two polymer blocks A constituted mainly by a vinyl aromatic compound and at least two polymer blocks B constituted mainly by a conjugated diene compound, at least one polymer block B being arranged on an end of a polymer chain thereof, a number-average molecular weight of said block copolymer being between 30,000 and 65,000 and a content of the vinyl aromatic compound in the block copolymer being between 15 wt% and 40 wt%.
Claim 2
Dependent Claim
29 words
A stretchable nonwoven fabric according to claim 1, wherein a 1,2-vinyl content of conjugated diene structure in the conjugated diene structure compound is between 20 wt% and 50 wt%.
Claim 3
Dependent Claim
22 words
A stretchable nonwoven fabric according to claim 1, wherein a number-average molecular weight of said block copolymer is between 35,000 and 60,000.
Claim 4
Dependent Claim
23 words
A stretchable nonwoven fabric according to claim 1, wherein a content of said vinyl aromatic compound is between 20 wt% and 35 wt%.
Claim 5
Dependent Claim
29 words
A stretchable nonwoven fabric according to claim 1, wherein a 1,2-vinyl content of conjugated diene structure in the conjugated diene structure compound is between 25 wt% and 45 wt%.
Claim 6
Dependent Claim
21 words
A stretchable nonwoven fabric according to claim 1, wherein a surface of said nonwoven fabric is smoothed by a heat treatment.
Claim 7
Dependent Claim
24 words
A stretchable nonwoven fabric according to claim 1, wherein a pattern is applied to a surface of said nonwoven fabric by a heat treatment.
Claim 8
Dependent Claim
15 words
A stretchable nonwoven fabric according to claim 1, wherein said thermal plastic fiber is electrified.
Claim 9
Dependent Claim
24 words
A composite nonwoven fabric comprised of a stretchable nonwoven fabric according to claim 1 and a sheet-like material piled on said stretchable nonwoven fabric.
Claim 10
Independent Claim
119 words
A method of manufacturing a stretchable nonwoven fabric, wherein a block copolymer including at least two polymer blocks A of a vinyl aromatic compound and at least two polymer blocks B of a conjugated diene, and in which a content of the vinyl aromatic compound is between 15 wt% and 40 wt% and at least one polymer block B is arranged on an end of a polymer chain, and a number-average molecular weight of which is between 30,000 and 65,000, is manufactured by a sequential block copolymerization; said block copolymer is hydrogenated; the obtained hydrogenated block copolymer is spun, and a fiber group obtained by a spinning process is accumulated on a collecting face to form a fiber web.
Claim 11
Dependent Claim
25 words
A method of manufacturing a stretchable nonwoven fabric according to claim 10, wherein a coupling reaction is applied after said sequential block copolymerization is performed.
Claim 12
Dependent Claim
28 words
A method of manufacturing a stretchable nonwoven fabric according to claim 10, wherein a melt blown method is used as said spinning method, to obtain a fiber web.
Claim 13
Dependent Claim
20 words
A method of manufacturing a stretchable nonwoven fabric according to claim 10, wherein said method further includes a heat treatment.
Claim 14
Dependent Claim
20 words
A method of manufacturing a stretchable nonwoven fabric according to claim 10, wherein said method further includes an electric treatment.
Claim 15
Dependent Claim
29 words
A method of manufacturing a stretchable nonwoven fabric according to claim 10, wherein said method further includes a process of accumulating another sheet-like material on said stretchable nonwoven fabric.
Claim 16
Dependent Claim
88 words
A stretchable nonwoven fabric composed of a fiber comprising a hydrogenated block copolymer C obtained by hydrogenating a block copolymer including at least two polymer blocks A constituted mainly by a vinyl aromatic compound and at least two polymer blocks B constituted mainly by a conjugated diene compound, on an end of a polymer chain of which at least one polymer block B is arranged, and a polyolefin D, wherein a polymerization ratio (C/D) of the hydrogenated block copolymer and the polyolefin D is between 40/60 and 99/1.
Claim 17
Dependent Claim
18 words
A stretchable nonwoven fabric according to claim 16, wherein said polymerization ratio (C/D) is between 50/50 and 95/5.
Claim 18
Dependent Claim
14 words
A stretchable nonwoven fabric according to claim 16, wherein said polyolefin is a polyethylene.
Claim 19
Dependent Claim
14 words
A stretchable nonwoven fabric according to claim 16, wherein said polyolefin is a polypropylene.
Claim 20
Dependent Claim
23 words
A stretchable nonwoven fabric according to claim 16, wherein a mean diameter of fibers constituting said nonwoven fabric is 10 mm or less.
Claim 21
Dependent Claim
22 words
A stretchable nonwoven fabric according to claim 16, wherein a surface of the nonwoven fabric is made smooth by a heat treatment.
Claim 22
Dependent Claim
24 words
A stretchable nonwoven fabric according to claim 16, wherein a pattern is applied to a surface of the nonwoven fabric by a heat treatment.
Claim 23
Dependent Claim
14 words
A stretchable nonwoven fabric according to claim 16, wherein the thermoplastic fiber is electrified.
Claim 24
Dependent Claim
24 words
A composite nonwoven fabric composed of a stretchable nonwoven fabric according to claim 16 and a sheet-like material piled on the stretchable nonwoven fabric.
References Cited (Backward Citations)
No citation records indexed.
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