Claims
- 1. A fiber and film forming polyester consisting essentially of recurring structural units of the formula
- --C(O)--R--C(O)--OGO--
- wherein R is
- about 97 to 99.9 mole % para-phenylene and
- about 0.1 to 2.5 mole % of the sulfonate radical, ##STR4## where M is an alkali metal or alkaline earth metal,
- and wherein G is
- at least about 13% by weight of a radical of a polyalkylene glycol of molecular weight at least about 250, and
- up to about 40 mole % of a polyethylene ether radical selected from the group consisting of --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 -- and --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --,
- with the remainder being selected from the group consisting of --(CH.sub.2).sub.2 --, --(CH.sub.2).sub.3 -- and --(CH.sub.2).sub.4 --.
- 2. Polyester according to claim 1, wherein R is about 98 to 98.5 mole % para-phenylene and about 1.5 to 2% of the sulfonate radical, and G contains about 15% to 20% by weight of the polyalkylene glycol radical.
- 3. A fiber of the polyester of claim 1.
- 4. A fiber of the polyester of claim 2.
- 5. A non-woven sheet of the polyester of claim 1.
- 6. A non-woven sheet of the polyester of claim 2.
- 7. A film of the polyester of claim 1 or 2.
- 8. A composite film of the polyester of claim 1 or 2 and of a layer of nonwoven sheet.
- 9. A disposable diaper which includes an absorbent body portion having on one surface thereof a water permeable nonwoven sheet of fibers of the polyester of claim 1 or 2.
- 10. A disposable diaper which includes an absorbent body portion having on one surface thereof a water impermeable film of the polyester of claim 1 or 2.
- 11. A fiber and film forming copolyester consisting essentially of about 60%-98% by weight of the copolyester being recurring structural units (1) of the formula
- --C(O)--R--C(O)--OGO--
- wherein R is
- about 93 to 99.9 mole % para-phenylene
- and about 0.1 to 2.5 mole % of the sulfonate radical ##STR5## where M is an alkali metal or alkaline earth metal,
- and wherein G is
- at least about 13% by weight of a radical of a polyalkylene glycol of molecular weight at least about 250, and
- up to about 40 mole % of a polyethylene ether radical selected from the group consisting of --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 -- and --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --,
- with the remainder being selected from the group consisting of --(CH.sub.2).sub.2 --, --(CH.sub.2).sub.3 -- and --(CH.sub.2).sub.4 --,
- and about 2% to 40% by weight of the copolyester being structural units (2) of the formula [--C(O)--Q--O--].sub.n, and Q are such that the hydroxy acid HO-13 C(O)--Q--OH and/or the polyhydroxyacid HO[--C(O)--Q--O--].sub.n H has a melting point at least 5.degree. C. lower than its composition temperature.
- 12. A copolyester according to claim 11, wherein Q is selected from the group consisting of --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, --C(R')H--, --(CH.sub.2).sub.5 --, and --C(R')H--CH.sub.2 --, where R' is selected from the group consisting of --CH.sub.3 and --CH.sub.2 --CH.sub.3.
CROSS-REFERENCE TO RELATED APPLICATIONS
This Application is a continuation-in-part of copending parent application Ser. No. 07/522,134, filed by Tietz, May 11, 1990, U.S. Pat. No. 5,053,482.
US Referenced Citations (8)
Non-Patent Literature Citations (2)
Entry |
Ingamells, J. Appl. Poly. Sci., vol. 26, 4087-4101 (1981). |
Grassie, Developments in Polymer Degradation-5, 112-119 (1984), Applied Science Publishers. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
522134 |
May 1990 |
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