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Cardable hydrophobic polyolefin fibres comprising cationic spin finishes

A technology of spinning oil and hydrophobicity, applied in the direction of single-component polyolefin rayon, fiber type, fiber treatment, etc., can solve problems such as poor antistatic properties

Inactive Publication Date: 2002-01-02
FIBERVISIONS VARDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, fibers with the required degree of hydrophobicity are usually not antistatic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] Embodiment 1 (comparative example)

[0141] A kind of with anionic antistatic agent (neutralized C 16 ~C 18 alcohol phosphate, the majority of which is neutralized stearyl phosphate) spin finish treated silicone-free fibers. The cohesion length of the fiber web was 1.75 m.

[0142] A comparison of Example 1 with Examples 4, 5 and 7 shows the effect of changing the anionic antistatic agent to a cationic antistatic agent when the fibers were not treated with a silicone compound to improve their hydrophobicity. The liquid absorption time of the fibers increased from about 10 minutes (Example 1) to 1 hour to over 24 hours for the other Examples. For non-woven fabrics, the water repellency increased from 1.5 cm to 3-5 cm, and the penetration time increased from less than 10 seconds to more than 300 seconds (it should be noted that in all penetration tests, if the liquid does not penetrate the non-woven fabric after 300 seconds, it will aborted). It can be seen that the ...

Embodiment 2

[0143] Embodiment 2 (comparative example)

[0144] The fibers were treated with a second spin finish with an antistatic agent, which was very viscous (34mPa's) and formed a large amount of stable foam, so the finish could not be properly controlled. This also causes the uneven distribution of spinning oil on the surface of the fiber, which affects the hydrophobicity of the fiber (liquid absorption time) and the hydrophobicity of the nonwoven fabric (permeation time 11 seconds, water repellency 0.5cm). These values ​​are much worse than, for example, the values ​​of Examples 4 and 8, which have very low viscosity spin finishes.

Embodiment 3

[0145] Embodiment 3 (comparative example)

[0146] Silicone-containing fibers were prepared using the same anionic antistatic agent as in Example 1 and a large amount of silicone. The fibers have good hydrophobicity, but have limited web cohesion, so only moderate combability. At a "normal" carding speed of 100m / min, the hydrophobicity is good (breakthrough time 300 seconds), while when the carding speed is slightly higher, such as 151m / min, the breakthrough time is greatly reduced, only about 41 seconds, the reason The fiber distribution in the fiber web is uneven. The cohesion length of the fiber web was 1.75 m.

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PUM

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Abstract

A method for producing cardable, hydrophobic polyolefin-based staple fibres by applying to spun filaments a first spin finish comprising at least one cationic antistatic agent, in particular a quaternary ammonium salt, stretching the filaments, applying to the stretched filaments a second spin finish in the form of a dispersion comprising at least one hydrophobic lubricant selected from a fatty acid amide condensation product and a hydrocarbon wax, the second spin finish optionally further comprising a polydiorganosiloxane in an amount of up to 15 % by weight, and crimping, drying and cutting the filaments to obtain staple fibres; as well as texturized, cardable, polyolefin-based staple fibres prepared by the method and hydrophobic nonwoven materials produced from such fibres. The fibres are able to be carded at extremely high speeds and are particularly suitable for use in the preparation of thermally bonded hydrophobic nonwoven fabrics in which a dry, water-repellant surface which can function as a liquid barrier is desired, e.g. for disposable diapers, feminine hygienic products and medical products.

Description

field of invention [0001] The present invention relates to cardable and heat-bondable polyolefin-based synthetic fibers treated with a hydrophobic spin finish containing a cationic antistatic agent and a hydrophobic lubricant; a process for preparing such fibers and by Non-woven fabrics made of this fiber. [0002] The fibers are characterized by their ability to be carded at very high speeds and are particularly suitable for the production of thermally bonded hydrophobic nonwovens requiring a dry, water-repellent surface as a liquid barrier, for example for disposable diapers and Feminine hygiene products. The fibers are also suitable for thermally bonded medical nonwovens that require a dry, water-repellent surface to reduce bacterial penetration, such as surgical gowns and drapes. Background of the invention [0003] Many polyolefin-based hydrophobic synthetic fibers are known, such as hydrophobic textile fibers having stain resistance. However, such fibers usually con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/42D01D5/096D01D5/26D01F6/04D01F11/06D04H1/4291D04H1/54D04H1/541D04H1/544D04H1/74D06M13/02D06M13/322D06M13/402D06M13/46D06M13/463D06M13/467D06M13/51D06M15/227D06M15/643D06M23/08D06M101/18
CPCD04H1/4291D04H1/54D06M15/643D06M2101/18D04H1/74D06M23/08D06M2200/40Y10T442/681D06M13/463Y10T442/2205D06M13/02Y10T442/20D04H1/541D06M13/467D04H1/544D06M7/00D06M13/402Y10T442/2213D06M15/227Y10T442/2164D04H1/5412
Inventor A·扬森K·迪莫斯-扬森L·D·克劳森B·马赫
Owner FIBERVISIONS VARDE
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