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Process for making nonwoven webs

A technology of non-woven fibers and fibers, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve problems such as uneven melting and bonding, and reduced effectiveness

Inactive Publication Date: 2013-02-06
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smaller fibers together with the inherent non-uniform heating in the calender tend to produce non-uniform melting and bonding and render the web less useful in filtration and battery separators and other energy storage applications

Method used

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  • Process for making nonwoven webs
  • Process for making nonwoven webs
  • Process for making nonwoven webs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Two-component spunbond fabrics are made from a polyethylene terephthalate (PET) component and a polyphenylene sulfide (PPS) component. The PET component had an intrinsic viscosity of 0.633 dl / g and was purchased from PolyQuest (Wilmington, NC) as PET resin grade PQB8A-065. by trade name PPS was purchased from Ticona Engineering Polymers (Florence, KY). The PPS component was a mixture of 70 wt% 0309 grade C1 and 30 wt% 0317 grade C1.

[0059] The following materials were used in the examples. All commercial materials were used as received unless otherwise indicated. Tin(II) 2-ethylhexanoate (90%) and zinc oxide (99%) were obtained from Sigma-Aldrich (St. Louis, MO). Tin (II) stearate (98%) (Sn stearate) was obtained from Acros Organics (Morris Plains, NJ). Zinc stearate (99%) (Zn stearate) was obtained from Honeywell Reidel-de Haen (Seelze, Germany). Tin(II) 2-ethylhexanoate is also referred to herein as tin(II) ethylhexanoate or SnEH.

[0060] The additive, if us...

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Abstract

A nonwoven web comprising bicomponent fibers. The fibers have continuous phases each of a first polyarylene sulfide (PAS) component and a polymer component. The polymer component may also be a second polyarylene sulfide. The first polyarylene sulfide component contains a tin or a zinc additive or both, and the first polyarylene sulfide component of any given fiber is at least partially exposed to the external surface of that fiber.

Description

field of invention [0001] The present invention relates to methods of making nonwoven webs, and in particular to methods of making webs formed from polyarylene sulfide. Background of the invention [0002] It is known that the physical properties of webs can be improved by calendering, which is the process of passing a sheet material through a nip between rolls or plates to impart a smooth, flat appearance to the sheet material or otherwise improve selected physical properties. [0003] By calendering paper or other fibrous materials, an attempt is made to further improve the quality of the formed paper or to provide a stable level of quality to allow higher run speeds or increased volumes for making paper. It is well known that the plasticity or molding tendency of paper or fibers can be increased by increasing the temperature and / or plasticizer content of the paper or fibers. When the temperature of the polymers contained in the paper rises to or exceeds the so-called gla...

Claims

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Application Information

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IPC IPC(8): D04H3/005D04H3/16D04H3/10D01D5/34D01F1/10D01F8/14D01F8/04D04H1/56D04H3/02
CPCD01F8/16D01F1/10D04H1/56D01D5/34D04H3/02D04H3/005D04H3/10D04H3/147
Inventor L.克里什纳墨菲J.C.里特J.M.波利诺M.T.波蒂格尔J.C.豪D.M.小劳拉H.V.萨米尔森R.J.杜夫Z-Z.黄Z.殷
Owner EI DU PONT DE NEMOURS & CO
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