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Fibers and fabrics made from ethylene/ alpha-olefin interpolymers

A technology of olefin interpolymers and interpolymers, applied in fabrics, fiber processing, filament/thread forming, etc., can solve problems such as difficult manufacturing and use

Inactive Publication Date: 2011-04-13
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One or more of these characteristics can make the product unusually difficult to manufacture and use

Method used

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  • Fibers and fabrics made from ethylene/ alpha-olefin interpolymers
  • Fibers and fabrics made from ethylene/ alpha-olefin interpolymers
  • Fibers and fabrics made from ethylene/ alpha-olefin interpolymers

Examples

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preparation example Construction

[0247] where T x Is the preparation ATREF elution temperature (preferably expressed in K (Kelvin)) of the i fraction, P X is the ethylene mole fraction of fraction i, which can be measured by NMR or IR as described above. P AB is the ethylene mole fraction of the bulk ethylene / α-olefin interpolymer (before fractionation), which can also be measured by NMR or IR. T A and P A is the ATREF elution temperature and ethylene mole fraction of the pure "hard segment" (which refers to the crystalline segment of the interpolymer). If the actual value of the "hard segment" is not available, then as a first approximation, T A and P A Values ​​are set to those of high density polyethylene homopolymer. For the calculations performed in this application, T A is 372°K, P A it's 1.

[0248] T AB are of the same composition and have P AB ATREF temperature of random copolymers of ethylene mole fractions. T AB can be calculated from the following equation:

[0249] Ln P AB =α / T A...

Embodiment

[0415] Spunbond nonwoven fabric samples consisting of Examples 1 through 81c in Table IV, Table V, and Table VI were prepared using Reicofil's Reicofil 4 spunbond technology. The technology consists of a 1.2 meter wide spunbond line with two independent extruders providing a bicomponent spin beam configuration and a separate spin pump for each extruder.

[0416] Spunbond nonwovens are manufactured by melting the polymer via an extruder maintained at a constant pressure of 60 bar, into a melt pump that delivers the melt frontward to a polymer melt die A spin beam consisting of dies for delivering a homogeneous melt to a distribution plate and spinnerets under constant pressure. The spinneret design in this test had 6827 holes per meter, a hole diameter of 0.6mm and an L / D ratio of 4. Yields are 0.44ghm to 0.72ghm and fiber deniers are 1.6denier to 2.2denier.

[0417] Molten polymer exits the spinneret (6827 fibers per meter) and is then accelerated drawn via air streams to pr...

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Abstract

A bicomponent fiber is obtainable from or comprises an ethylene / alpha-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams / cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re >1481-1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics, such as spunbond, melt blown and spun-laced fabrics or webs can be made from such fibers.

Description

[0001] Cross References to Related Applications [0002] This application is related to the benefit of US Provisional Application 60 / 718,197, filed September 16,2005. This application is also related to PCT Application PCT / US2005 / 008917, filed March 17, 2005, which in turn claims priority to US Provisional Application 60 / 553,906, filed March 17, 2004. This application is also related to US patent application Ser. No. 11 / 376,873. The contents of these applications and said PCT application are hereby incorporated by reference in their entirety for purposes of US patent practice. technical field [0003] This application relates to fibers made from ethylene / alpha-olefin interpolymers, methods of making the fibers, and products made from the fibers, and articles comprising the fibers and products. Products made from the fibers include woven and nonwoven fabrics (ie, webs). The extensible and elastic bicomponent fibers and webs of the present invention are particularly suitable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00C08F10/00C08F4/659B32B5/24C08L23/08
CPCC08F4/65912D04H1/555C08F4/65908D04H1/492D04H3/147D04H1/465D04H3/018D04H1/49C08L51/06C08F255/00C08F10/02D04H1/42D04H1/70D04H13/007C08L23/0815D04H3/16D04H1/4382D04H3/11C08F4/6592D04H1/541D04H1/74C08F2420/02C08L2205/02C08F210/16C08F10/00C08F255/02C08F4/65927C08F210/18D01F8/06D04H1/4291D04H3/007D04H5/03Y10T428/2929Y10T442/608Y10T442/602Y10T442/641Y10T442/637D04H1/43828D04H1/5416D04H1/5412D04H1/5414D04H1/4383D04H1/43832D04H1/43912C08F4/65904C08L2666/06C08L2666/02C08F210/06C08F2500/21C08F2500/19C08F2500/03C08F2500/20C08F2500/12C08F210/14C08F236/20C08F4/64144C08F4/64048C08F4/64148C08F4/64193D01D5/34
Inventor 格特·克拉森罗纳德·威克斯安迪·张德布拉·尼曼
Owner DOW GLOBAL TECH LLC
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