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End products incorporating short-cut microfibers

A technology of microfiber and fiber products, which is applied in the field of fiber products and can solve problems such as increasing manufacturing costs

Inactive Publication Date: 2014-11-12
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fiber formation from known water-soluble polymers by solution technology is an alternative, but the added complexity of removing solvents, especially water, raises manufacturing costs

Method used

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  • End products incorporating short-cut microfibers
  • End products incorporating short-cut microfibers
  • End products incorporating short-cut microfibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0365] Containing 76 mol% isophthalic acid, 24 mol% sodium sulfoisophthalic acid, 76 mol% diethylene glycol and 24 mol% 1,4-cyclohexane via an Ih.V. of 0.29 and a Tg of 48°C The sulfopolyester of alkanedimethanol was melt blown onto a cylindrical collector through a nominal 6 inch die (30 holes / inch in the nosepiece) using the conditions shown in Table 1 . No need to insert paper. A soft, handleable, flexible web is obtained that does not block during roll winding. Physical properties are provided in Table 2. As shown by the data in Table 3, small pieces (1” x 3”) of nonwoven fabric were readily dispersed in room temperature (RT) and 50°C water with mild agitation.

[0366] Table 1 - Melt blown conditions

[0367]

[0368] Table 2 - Physical Properties of Nonwoven Fabrics

[0369]

[0370] Table 3 - Dispersibility of nonwoven fabrics

[0371]

Embodiment 2

[0373] A sulfo group containing 89 mol% isophthalic acid, 11 mol% sodium sulfoisophthalic acid, 72 mol% diethylene glycol and 28 mol% ethylene glycol with an Ih.V. of 0.4 and a Tg of 35°C The polyester was meltblown through a 6 inch die using conditions similar to those in Table 1 . A soft, handleable, flexible web is obtained that does not block during roll winding. Physical properties are provided in Table 2. Small pieces (1” x 2”) of nonwoven fabric dispersed easily and completely at 50°C and 80°C; at RT (23°C), as shown by the data in Table 3, the fabric took longer to fully disperse.

[0374] It was found that the compositions in Examples 1 and 2 could be overblown onto other nonwoven substrates. It is also possible to condense and wrap in place of the shaped or contoured forms used in traditional net collectors. Thus, a circular "roving" or plug form of the web can be obtained.

Embodiment 5

[0380] The PP has a MFR (melt flow rate) of 800. The meltblowing operation was performed on a line with a 24 inch wide die to produce a handleable soft, flexible but non-blocking web with the physical properties provided in Table 2. Small pieces (1” x 4”) of nonwoven fabric disintegrated easily as reported in Table 3. However, due to the insoluble polypropylene component, no fiber is completely water dispersible.

[0381] Example 3

[0382] A circular piece (4" diameter) of the nonwoven fabric made in Example 2 was used as an adhesive layer between two pieces of cotton fabric. The two pieces of cotton were fused together using a Hannifin melt press by applying a pressure of 35 psig at 200°C for 30 seconds. The resulting assembly exhibits exceptionally strong consolidation strength. The cotton substrate tears before the bond or consolidation fails. Similar results were obtained with other celluloses and with PET polyester substrates. Strong consolidation is also produced ...

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Abstract

Various fibrous articles incorporating a water non-dispersible short-cut polymer microfiber are provided. The water non-dispersible short-cut polymer microfibers can be incorporated into a number of different fibrous articles including personal care products, medical care products, automotive products, household products, personal recreational products, specialty papers, paper products, and building and landscaping materials. In addition, the water non-dispersible short-cut polymer microfibers can be incorporated into nonwoven webs, thermobonded webs, hydroentangled webs, multilayer nonwovens, laminates, composites, wet-laid webs, dry-laid webs, laminates, composites, wet laps, woven articles, fabrics and geotextiles. These various end products can incorporate the water non-dispersible short-cut polymer microfibers in varying amounts based on the desired end use.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of Application Serial No. 12 / 199,304, filed August 27, 2008, which is a continuation-in-part of Provisional Application Serial No. 61 / 041,699, filed April 2, 2008, and 2007 Continuation-in-Part Application Serial No. 11 / 648,955, filed January 3, 2006 (now issued as US Patent No. 7,892,993) ), a continuation-in-part of Application Serial No. 11 / 344,320, which is a continuation-in-part of Application Serial No. 11 / 204,868 filed August 16, 2005 (now issued as U.S. Patent No. 7,902,094), and which is a division of Application Serial No. 10 / 850,548 filed May 20, 2004 (now issued as U.S. Patent No. 6,989,193), which is a division of Application Serial No. 10 / 465,698 filed January 19, 2003 Partial continuation of the application case. The aforementioned application is hereby incorporated by reference. field of invention [0003] The present invention relates to water dispersible fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/00D01F9/00D04H1/00B32B1/00
CPCD04H3/16D01D5/36D04H1/42D04H13/002D01D5/0985D04H1/4382D21H13/20D21H13/40D21H13/24D01F8/14D01F6/84D21H15/10D04H1/565D04H1/56D04H1/4374Y10T428/24355Y10T428/268Y10T428/1345Y10T428/1334Y10T442/609Y10T442/614Y10T428/249921Y10T442/3065D04H1/43828D04H1/43832D04H1/43838D04H1/4383
Inventor R.K.古普塔D.W.克罗谢维奇M.G.米切尔M.D.克拉克C.D.安德森
Owner EASTMAN CHEM CO
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