Patent US4622263A successfully refreshed from Google Patents.
US4622263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water absorbing webs
Assignee: Toray Industries Inc
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Filing: 1985-05-14
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Granted: 1986-11-11
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Expires: 2005-05-14
Abstract
Abstract This invention relates to a melt-blow water-absorbing fiber webs whose main component is block-copolyetheresters having polyester and polyether segments in the molecules, wherein the amount the polyether component is 5 to 80 wt % base on the block-copolyetheresters. The water-absorbing web of this invention shows high chlorine fastness and consequently shows excellent water absorption performances after repeated washing. They are available as good batting (urine absorber) for diapers, as well as bed pads, towel materials and sports underpants, and applicable to a wide range of disposal products which require high water absorption performances and durability.
Inventors
- 👤 Katsutoshi Ando
- 👤 Eiichi Nishiura
- 👤 Yoshiyuki Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; D01; D01F; D01F6/00; D01F6/78; D01F6/86; D04H1/00; D04H1/40; D04H1/54; D04H1/56; D04H3/005; D04H3/009; D04H3/011; D04H3/016; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/60; Y10T442/68; Y10T442/697
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
38 words
A melt-blow water-absorbing web of fibers whose main component is a block-copolyetherester having a polyester segment and a polyether segment therein, with said polyether segment comprising 5 to 80 wt % of the total weight of said blockcopolyetherester.
Claim 2
Dependent Claim
38 words
A melt-blow water-absorbing web of fibers whose main component is a block-copolyetherester having a polyester segment and a polyether segment therein, with said polyether segment comprising 5 to 80 wt % of the total weight of said blockcopolyetherester.
Claim 3
Dependent Claim
29 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said melt-blow web of fibers is manufactured from a mixture of said block-copolyetherester and other organic polymers.
Claim 4
Dependent Claim
31 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said melt-blow web of fibers is manufactured from said block-copolyetherester containing about 5 to 30 wt % of polyethers.
Claim 5
Dependent Claim
30 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein heat stabilizers are blended at the ratios of 0.05 to 10 wt % to said main component thereof.
Claim 6
Dependent Claim
18 words
The melt-blow water-absorbing web of fibers as claimed in claim 2, wherein said other organic polymers are polyesters.
Claim 7
Dependent Claim
29 words
The melt-blow water-absorbing web of fibers as claimed in claim 2, wherein said other organic polymer is one at least being selected out of polyalkylene glycol, and polyalkylene oxide.
Claim 8
Dependent Claim
17 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said polyester segment is polybutyleneterephthalate.
Claim 9
Dependent Claim
17 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said polyester segment is polyethyleneterephthalate.
Claim 10
Dependent Claim
17 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said polyether segment is polyalkyleneglycol.
Claim 11
Dependent Claim
17 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said polyether segment is polyalkyleneglycol.
Claim 12
Dependent Claim
17 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said polyether segment is polyethyleneglycol.
Claim 13
Dependent Claim
28 words
The melt-blow water-absorbing web of fibers as claimed in claim 1, wherein said melt-blow web of fibers is manufactured from a mixture of said block-copolyester and alkylbenzene sulfonate.
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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |