Cord, rubber-cord composite structure, and tire

A composite and cord technology, applied in motorcycle tires, tire parts, reinforcement layers of pneumatic tires, etc., can solve the problems of low initial elastic modulus, low tire operation stability, etc., to improve high-speed durability, Excellent tire performance and the effect of reducing environmental load

Inactive Publication Date: 2015-04-08
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In addition, synthetic fibers such as nylon or PET have low initial modulus of elasticity, and thus tires obtained by using these synthetic fibers have low handling stability

Method used

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  • Cord, rubber-cord composite structure, and tire
  • Cord, rubber-cord composite structure, and tire
  • Cord, rubber-cord composite structure, and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 6 and comparative example 1 to 4

[0271] [Manufacture of multifilament]

[0272] Dissolve the pulp in 1-ethyl-3-methylimidazolium acetate (C2AmimAc), 1-ethyl-3-methylimidazolium diethylphosphate (C2mimDEP) or N-methylmorpholine- The dissolved cellulose solution in N-oxide (NMMO) was filtered and degassed. Next, the dissolved cellulose solution was extruded through the extruder in the coagulation bath (in the solidification tank) after being heated to the spinning temperature, and thus used for compounding of Examples 1 to 6 and Comparative Examples 1 to 4 Silk (purified cellulose fiber) was obtained through a washing process and a drying process (refer to Table 1).

[0273] The properties of the multifilaments used in the respective Examples and the respective Comparative Examples were measured by the following test methods, and the results thereof are shown in Table 1.

[0274] (1) Denier of raw yarn

[0275] 100 m of multifilament was sampled, dried at 130° C. for 30 minutes, then cooled to room temperatu...

Embodiment 7 to 12 and comparative example 5 to 7

[0310] [Manufacture of Multifilament A]

[0311] The dissolved cellulose solution in which the pulp was dissolved in 1-ethyl-3-methylimidazolium diethylphosphate (C2mimDEP) or N-methylmorpholine-N-oxide (NMMO) was filtered and removed. gas. Next, the dissolved cellulose solution was extruded through the extruder in the coagulation bath (in the solidification tank) after being heated to the spinning temperature, and thus used for compounding of Examples 7 to 12 and Comparative Examples 5 to 7. Silk A (purified cellulose fiber) was obtained through a washing process and a drying process (refer to Table 2).

[0312] [Manufacture of multifilament B]

[0313] Multifilament B (nylon) used in Examples 7 to 12 and Comparative Example 6 was obtained through a melt spinning process (refer to Table 2).

[0314] The properties of the multifilaments used in the respective Examples and the respective Comparative Examples were measured by the following test methods, and the results thereo...

Embodiment 13 to 17 and comparative example 8 to 13

[0350] [Manufacture of multifilament (raw yarn)]

[0351] Dissolve the pulp in 1-ethyl-3-methylimidazolium acetate (C2AmimAc), 1-ethyl-3-methylimidazolium diethylphosphate (C2mimDEP) or N-methylmorpholine- The dissolved cellulose solution in N-oxide (NMMO) was filtered and degassed. Next, the dissolved cellulose solution was extruded through an extruder in a coagulation bath (in a water bath) after being heated to the spinning temperature, and thus Examples 13 to 17 and Comparative Examples 8 to 13 shown in Table 3 The multifilament (refined cellulose fiber) is obtained through a washing process and a drying process.

[0352] The properties of the multifilaments used in the respective Examples and the respective Comparative Examples were measured by the following test methods, and the results thereof are shown in Table 3.

[0353] (1) Raw yarn fineness

[0354] 100 m of the obtained multifilament was sampled, dried at 130° C. for 30 minutes, and then cooled to room temperat...

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Abstract

An object of the present invention aims to provide a cord formed by twisting purified polysaccharide fibers which are manufactured by using a raw material with a low environmental impact and do not emit carbon disulfide, in which the cord is able to confer durability and resistance to external damage to a tire when the cord is used in the tire. A cord is provided formed by bringing a polysaccharide solution which is formed by dissolving a polysaccharide raw material in a liquid including an ionic liquid in contact with a solidifying liquid, and by twisting raw yarn which is purified polysaccharide fibers formed by spinning polysaccharides, in which a relationship between tenacity TB (cN / dtex) of the raw yarn at 25°C and elongation at break EB (%) of the raw yarn at 25°C satisfies the following expression (1) and the following expression (2), and a twisted yarn tenacity utilization rate (CT / TB) at the time of setting cord tenacity at 25°C to CT (cN / dtex) when the raw yarn is twisted to be a cord is greater than or equal to 70%.

Description

technical field [0001] The present invention relates to a cord, a rubber-cord composite and a tire. Background technique [0002] Cellulose fibers have excellent dimensional stability, high adhesiveness, and low temperature dependence of elastic modulus (change in elastic modulus with respect to temperature), and are therefore widely used in tires as rayon. By using rayon for a reinforcing cord layer of a tire, durability at high speed running and handling stability can be improved, and thus rayon contributes to high-performance tires that have recently been demanded. [0003] However, rayon emits carbon disulfide during the manufacturing process, and has a very high environmental load, and thus does not meet the current demand for manufacturing products using raw materials with low environmental load. [0004] Properties such as excellent dimensional stability, high adhesion and low temperature dependence of the modulus of elasticity are highly dependent on the fact that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/00B60C9/00D02G3/48
CPCD02G3/48B60C17/0009D01F2/00B60C9/0042B60C2200/10B60C2009/0475B60C9/00D01F2/02D01F2/24D01F9/00B60C9/02D02G3/042
Inventor 小出光治杉本健一
Owner BRIDGESTONE CORP
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