Biodegradable cotton composites

a technology of biodegradable cotton and composites, applied in the field of composite materials, can solve the problems of more difficult thermal bonding between poly(lactide) fibers and fabrics, and other parts are either partially or non-biodegradabl

Inactive Publication Date: 2003-09-18
UNIV OF TENNESSEE RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poly(lactide) fibers and fabrics are more difficult to thermally bond by hot air, heated calenders, ultrasonic and infrared bonding than polypropylene or other material.
A problem with many laminates is that only portions of the laminate are fully biodegradable, leaving other portions either partially or non-biodegradable.

Method used

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  • Biodegradable cotton composites
  • Biodegradable cotton composites
  • Biodegradable cotton composites

Examples

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Embodiment Construction

[0026] EASTAR BIO GP COPOLYESTER ("EASTAR BIO") is marketed by the Eastman Chemical Company of Kingsport, Tenn.. Spunbond / Cotton / meltblown (SCM) Cotton-Core Non-wovens (CCNs) comprising a biodegradable web, such as one comprising a totally biodegradable polymer such as an EASTAR BIO meltblown web instead of meltblown polypropylene webs, were produced and compared to CCNs containing polypropylene in both the meltblown and spunbond components. The absorbent cores had a weight of 1.5 oz / yd.sup.2 (51 g / m.sup.2) and consisted of carded 75 / 25 and 50 / 50 Cotton / polypropylene staple fiber blends. The laminates were all infrared bonded and evaluated for tearing strength, tenacity, and water absorption rate and maximum absorption. Use of EASTAR BIO meltblown in place of meltblown polypropylene resulted in stronger well-bonded laminates with exceptionally high absorbency on the EASTAR BIO meltblown side as well as in the cotton core.

[0027] Cotton-based non-woven materials may include cotton-cor...

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Abstract

A non-woven composite is disclosed, comprising a first layer, further comprising a biodegradable component; and a second layer, further comprising a biodegradation enhancement component, the second layer being bonded to the first layer. As each of these two layers has a biodegradable component, overall biodegrading is enhanced. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Description

PRIORITY DATA[0001] This application claims benefit under 35 U.S.C. Section 119 of provisional application 60 / 348,033 filed Jan. 10, 2002.[0002] The present invention relates generally to the field of composite materials and in particular non-woven fabrics which contain biodegradable material such as cotton.[0003] Cellulosic fibers offer the advantage of biodegradability of that component of the composite and render the composite more comfortable for wear and more useful in hygienic personal care products due to enhanced liquid absorption. The cotton-core and cotton-surfaced composites of this invention have been further enhanced by imparting elasticity, by incorporating more biodegradable components in addition to cellulosic fibers and by the addition of wetting agents to improve the wetting properties and accessibility for enhanced biodegradability.[0004] Thermally bonded non-woven laminates with spunbond polypropylene on one side and a meltblown polypropylene web on the other sid...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F13/15B32B5/26D04H13/00
CPCA61F13/15252D04H13/007D04H13/002B32B5/26D04H1/435D04H1/55D04H1/559D04H1/56Y10T442/60Y10T442/681
Inventor WADSWORTH, LARRY C.
Owner UNIV OF TENNESSEE RES FOUND
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