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Multicomponent aliphatic polyester blend fibers

a technology of polyester blend and aliphatic polyester, which is applied in the field of multi-component thermoplastic fibers, can solve the problems of reducing the temperature at which satisfactory bonding can occur, and achieve the effects of reducing temperature, reducing viscosity of the first polymer component, and increasing melt flow ra

Inactive Publication Date: 2014-09-18
FIBER INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a new type of polylactic acid fiber that can be used in air bonding, which reduces energy consumption and increases line speed. The fiber has a specific composition and melt flow index that allows for suitable bonding at a lower temperature compared to conventional fibers. An additive can also be added to further increase the melt flow rate and reduce viscosity. Overall, this new fiber expands the options for binder fibers and makes air bonding a more practical option for certain applications.

Problems solved by technology

Thereby, the additive may reduce the temperature at which satisfactory bonding can occur.

Method used

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  • Multicomponent aliphatic polyester blend fibers
  • Multicomponent aliphatic polyester blend fibers

Examples

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example

[0070]An exemplary, non-limiting PLA binder fiber bonding test is described, such that the sensitivity of bond strength to bonding temperature at a 12 second dwell time in the bonding oven of a carded nonwoven fabric comprising 75% PLA 6202 fibers (available from NatureWorks, LLC) and 25% experimental binder fibers can be determined. Each test sample (a carded nonwoven fabric measuring 3 inches by 2 inches, with the 2 inch dimension in the direction of carding (i.e., parallel to the fiber direction) can be prepared as follows. First, 1.5 g of crimped PLA staple fiber made using Natureworks grade 6202D, 2 denier per filament, 1.5 inch cut length (the “matrix” fiber) can be prepared. Also, 0.5 g of binder fiber (as disclosed herein) can be weighed. The two fiber samples are placed on a hand card, being careful to distribute both fibers as evenly across the card as possible. Ideally, the matrix fiber goes onto the card first, since the experimental fiber may be uncrimped and thus is pr...

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Abstract

The present invention provides multicomponent thermoplastic fibers that are biodegradable and that are capable of forming strong bonds in air bonding processes. In various embodiments, the multicomponent fibers can include a first polymer component that includes a first aliphatic polyester, and a second polymer component also including an aliphatic polyester, wherein the first polymer component comprises at least a portion of an exposed surface of the multicomponent fiber. The first polymer component can be a fully amorphous polylactic acid and the second polymer component can be a semicrystalline polylactic acid. The multicomponent fiber can have cross-sectional area comprising the first polymer component and the second polymer component in about a 1:1 ratio, wherein the first polymer component and the second polymer component are configured in a sheath / core arrangement.

Description

FIELD OF INVENTION[0001]The present disclosure relates to a multicomponent thermoplastic fiber. In particular, the fiber can exhibit useful thermal-bonding characteristics, such as during thermal-bonding processes, including thermal bonding processes that do not require application of pressure.BACKGROUND[0002]Synthetic fibers are widely used in a number of diverse applications to provide stronger, thinner, and lighter weight products. Synthetic thermoplastic fibers are typically heat adhesive (thermobondable) and thus are particularly attractive for the manufacture of nonwoven fabrics, either alone or in combination with other fibers (such as cotton, wool, and wood pulp). Nonwoven fabrics, in turn, are widely used as components of a variety of articles, including without limitation absorbent personal care products, such as diapers, incontinence pads, feminine hygiene products, and the like; medical products, such as surgical drapes, sterile wraps, and the like; filtration devices; i...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H1/541D01F8/14
CPCD01F8/14D04H1/541D01D5/30D01F1/10Y10T428/2929Y10T428/2904Y10T442/637D04H1/5418D04H1/5416D04H1/5414D04H1/5412
Inventor DUGAN, JEFFREY S.HARRIS, FRANKHODGE, MICHAEL
Owner FIBER INNOVATION TECH
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