Claims
- 1. Thermal bondable polyolefin fibers comprising 1% by weight or more of a random copolymer A) of propylene with one or more comonomers selected from α-olefins of formula CH2═CHR, wherein R is a C2-C8 alkyl radical, the amount of said comonomer or comonomers being from 3% to 20% by weight with respect to the total weight of the random copolymer A).
- 2. The fibers of claim 1, having Tenacity values equal to or higher than 10 cN/Tex.
- 3. The fibers of claims 1 or 2, comprising a polyolefin composition C) containing from 20% to 100% by weight of the random copolymer A) and from 0% to 80% by weight of a polyolefin B) selected from polymers or copolymers, and their mixtures, of CH2═CHR olefins where R is hydrogen or a C1-C8 alkyl radical.
- 4. The fibers of claim 1, obtained from a random copolymer A) having a value of Tensile Strength at yield equal to or higher than 24 Mpa, or from a polyolefin composition comprising such copolymer A).
- 5. The fibers of claim 1, obtained from a polymeric material resulting from the chemical degradation of a random copolymer A) having a value of Tensile Strength at yield equal to or higher than 24 Mpa, or from the chemical degradation of a polyolefin composition comprising such copolymer A).
- 6. The fibers of claim 1, in form of single or composite fibers.
- 7. A process for preparing the fibers of claim 1, by spinning the random copolymer A), or by spinning a polyolefin composition comprising 1% by weight or more of such copolymer A).
- 8. Thermally bonded articles comprising the fibers of claim 1.
- 9. The thermally bonded articles of claim 8, in form of nonwoven articles.
- 10. The nonwoven articles of claim 9, comprising two or more nonwoven layers.
- 11. The thermally bonded articles of claim 8, comprising a nonwoven fabric coupled with a polyolefin film.
- 12. The fibers of claim 2 further comprising a polyolefin composition C) containing from 20% to 100% by weight of the random copolymer A) and from 0% to 80% by weight of a polyolefin B) selected from polymers or copolymers, and their mixtures, of CH2═CHR olefins where R is hydrogen or a C1-C8 alkyl radical.
Priority Claims (1)
Number |
Date |
Country |
Kind |
99201144 |
Apr 1999 |
EP |
|
Parent Case Info
This application is the U.S. national phase of International Application PCT/EP00/02674, filed Mar. 24, 2000.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/EP00/02674 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/63471 |
10/26/2000 |
WO |
A |
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A |
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A |
6281289 |
Maugans et al. |
Aug 2001 |
B1 |
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