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Spun-laid webs with at least one of lofty, elastic and high strength characteristics

A fabric, tensile strength technology, used in textiles, fabrics, textiles and papermaking, etc., can solve problems such as sticky hands, difficult, expensive, etc.

Active Publication Date: 2016-04-20
希尔斯公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this particular elastic polymer tends to be more expensive than normal, conventional spunbond polymers
In addition, elastomeric polymers are generally more difficult to process because issues such as fiber "stickiness" and low spinning speeds (i.e., the speed at which extruded filaments reach between the spinneret and the lower surface) often require dealing with such polymers thing
Fabrics formed from this polymer also suffer from certain drawbacks such as stickiness, difficulty or even impossibility to dye with dyes

Method used

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  • Spun-laid webs with at least one of lofty, elastic and high strength characteristics
  • Spun-laid webs with at least one of lofty, elastic and high strength characteristics
  • Spun-laid webs with at least one of lofty, elastic and high strength characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Slightly eccentric core-sheath fibers of continuous filaments spun into fabrics (e.g., with Figure 1C elaborating the geometry of the fiber) using the figure 2 A similar system is formed as shown. The core-sheath fibers consist of polylactic acid (PLA) polymer as the sheath ( Figure 1C The polymer component B) and polypropylene as the core ( Figure 1CThe polymer component A) in. In particular, PLA polymers are commercially available from NatureWorks Corporation (Minnesota) under the trade designation PLA6302, and polypropylene polymers are commercially available from Lyondell Bassell Industries (Texas) under the trade designation PPPH-835. The resulting eccentric core-sheath fibers include a slightly non-circular or irregularly shaped core. The cross-sectional view of the collection of fibers formed is shown in image 3 as shown in the image.

[0059] Spun fabrics made from this fiber were completely free of bonding on the porous belt. Instead, the fabric is ...

Embodiment 2

[0065] Continuous filaments are spun into fabrics using similar figure 2 The system shown is prepared where side-by-side two-components are used to prepare fabrics (e.g. Figure 1A shown). The side-by-side components (Components A and B) were the same PLA and polypropylene components as used in Example 1. A cross-sectional view of the fiber assembly is shown in Figure 4 as shown in the image. Corresponding to the activation using a boiling water tank (as in Example 1 or a similar activation treatment station), the spun fabric showed very similar properties to the fabric described in Example 1 (increase in fabric thickness or Z-dimension, density reduction, and enhanced fabric strength, fabric uniformity and fabric elasticity). While there is some fibrillation in the fibers forming the fabric (eg, partial separation of polymer component A from polymer component B in bicomponent fibers), it does not negatively affect the properties achieved after activation of the fabric. ...

Embodiment 3

[0067] use with figure 2 A similar system as shown produces a plurality of different continuous filament spun fabrics, wherein the fabric includes two types of bicomponent fibers side-by-side, solid (such as Figure 1A shown) and hollow (as Figure 1E shown), and sheath-core bicomponent fibers (such as Figure 1B and / or 1C). The polymer components (components A and B) used to form each fabric were the same polylactic acid (PLA) and polypropylene (PP) components used in Example 1, but used in different fabrics with different The volumetric two-component ratio. After each continuous filament spun fabric is formed or activated, each activated fabric is subjected to a series of tests to determine certain properties of the fabric, such as fabric loft, fabric strength, and fabric elasticity. Test data for each fabric is provided in Tables 1-5.

[0068] Table 1 - Formed continuous filament spunbond web

[0069]

[0070] Table 2 - Tensile Strength Evaluation

[0071]

[...

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Abstract

A continuous filament spun-laid web includes a plurality of polymer fibers within the web, the web having a first thickness and the web being free of any thermal or mechanical bonding treatment. Activation of the web results in at least one of an increase from the first thickness prior to activation to a second thickness post activation in which the second thickness is at least about two times greater than the first thickness, a decrease in density of the web post activation in relation to a density of the web prior to activation, the web being configured to withstand an elastic elongation from about 10% to about 350% in at least one of a machine direction (MD) of the web and a cross-direction (CD) of the web, and the web having a tensile strength from about 50 gram-force / cm2 to about 5000 gram-force / cm2.

Description

[0001] Cross reference to related applications [0002] This application claims priority to U.S. Provisional Patent Application No. 61 / 846,152, entitled "Self-bonded, bulky, uniform, stretchy spunbond process and fabrics," filed July 15, 2013, and U.S. Provisional Patent Application No. The priority of 61 / 986465, titled "High stretchable spunbonded fabric", was filed on April 30. The disclosures of these provisional patent applications are incorporated herein by reference in their entirety. technical field [0003] The present invention relates to the spinning process of fibers and nonwoven fabrics to form fabrics and other products. Background technique [0004] "Spinning" process as used herein means that one or more polymers are melted, extruded, air quenched, drawn (e.g. by air, godets and / or any other type of suitable equipment) , and deposit the solidified fibers onto a suitable deposition or support surface (such as a porous belt) to form one or more nonwoven layers...

Claims

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Application Information

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IPC IPC(8): D04H3/00
CPCD04H3/018D04H3/08D01D5/098D01F8/06D01F8/14Y10T442/681Y10T442/638Y10T442/601Y10T442/64Y10T442/641Y10T442/612
Inventor A.威尔基J.布朗J.哈格德A.A.德拉霍兹
Owner 希尔斯公司
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