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Lyocell multi-filament for tire cord, tire cord and tire

A tire cord and cord technology, applied in special tires, tire parts, tires, etc., can solve problems such as poor toughness

Inactive Publication Date: 2006-06-21
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this patent is that the fiber has such poor tenacity that it cannot be used as an industrial fiber or tire cord

Method used

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  • Lyocell multi-filament for tire cord, tire cord and tire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The mixed powder, NMMO·1H 2 O and 0.01% by weight of propyl gallate (propyl gallate) are mixed to produce 11.5% cellulose solution, wherein in the mixed powder contains 97% α-cellulose content and has 1200 degree of polymerization (DP w ) pulp is mixed with PVA in a weight ratio of 20:1. Spinnerets comprising 800, 1000 and 1200 holes and having a diameter of 120 mm were used to extrude the cellulose solution. At this time, the diameter of each hole was 150 μm, and the length-to-diameter ratio (L / D) of each hole was 4 for all spinnerets. When the cellulose solution (top temperature: 100° C.) passing through the spinning head flows through the air gap at a point 50 mm away from the spinning head, the cooling air with a temperature of 20° C. and a relative humidity of 40% flows at 4 m / s The speed is blown to the solution, and the extrusion amount of the solution and the spinning speed are controlled in such a manner that the obtained multifilament has a fineness of 1500 ...

Embodiment 2

[0076] The first mixed powder, the second mixed powder, NMMO·1H 2 O and 0.01 weight percent propyl gallate were mixed to produce two different cellulose solution samples, wherein in the first mixed powder, 97% α-cellulose was contained and 800 degree of polymerization (DP w ) pulp is mixed with PVA at a weight ratio of 20:1, in the second mixed powder, containing 97% α-cellulose and having 1200 degree of polymerization (DP w ) pulp is mixed with PVA in a weight ratio of 20:1. In this regard, the concentration of the cellulose solution containing pulp having a polymerization degree of 800 was 13.5%, and the concentration of the cellulose solution containing pulp having a polymerization degree of 1200 was 11.5%. A spinneret comprising 1000 holes with three diameters of 120, 150, 200 microns and a diameter of 120 mm was used to extrude the cellulose solution. At this time, the length-to-diameter ratio (L / D) of each hole was 5 for all spinnerets. According to the same method as...

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Abstract

PURPOSE: Lyocell multi-filament is capable of producing tire cord having excellent physical properties. The tire cord has low elongation, increased strength, increased modulus, excellent drive stability, shape stability and uniformity. A manufacturing method thereof is characterized by increasing productivity. The lyocell multi-filament is useful for a tire for a passenger car. CONSTITUTION: Lyocell multi-filament is obtained by the steps of: (i) dissolving mixed powder of cellulose and PVA in a solvent mixed N-methyl morpholine N-oxide(NMMO) and water to prepare dope; (ii) spinning the dope through a spinning nozzle containing many orifices; passing fiber of the dope through air; coagulating the fiber into an upper part of a conic coagulating bath to manufacture multi-filament; (iii) change a course of the filament in a lower part of the coagulating bath; washing the filament in a washing bath; and then (iv) drying, oiling and winding the filament. The orifices has 100-300μm of diameter, 200-2400μm of length, 2-8times of the ratio of the diameter to the length, and 2.0-5.0mm of intervals between the orifices.

Description

[0001] This application is a divisional application of the Chinese patent application filed by the applicant on September 29, 2003, with the title of invention "Lyocell Multifilament for Tire Cord and its Manufacturing Method" and application number 03132697.8. technical field [0002] The invention relates to a lyocell (Lyocell, a new type of cellulose fiber, also known as tencel) multifilament used for tire cords, a method for manufacturing the material, and an automobile tire cord and tire using the material. More particularly, the present invention relates to a lyocell multifilament for tire cords having excellent physical properties for tire cords, thereby providing tires with improved running stability, dimensional stability and uniformity, The invention also relates to a method of manufacturing the material, which is used for tire cords and tires for automobiles. Background technique [0003] As is well known to those skilled in the art, the tire cord materials used t...

Claims

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Application Information

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IPC IPC(8): D01F2/00D01F8/02B29D30/00B60C1/00D01D5/06
CPCD01F1/10D02G3/02D02G3/28D02G3/48D07B2501/2046D10B2505/022Y10S57/902
Inventor 李泰政崔秀明王英洙韩石锺金哲金明佑权益铉金圣龙崔在植
Owner HYOSUNG CORP
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