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Rubber-reinforcing fiber, rubber product, tire cord, and tire

A rubber-reinforced, fiber-based technology that can be used in fiber processing, tire parts, textiles, and papermaking to solve problems such as operability and cord quality deterioration

Pending Publication Date: 2022-07-29
BRIDGESTONE CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if there is an unexpected change in fiber length due to the kind of protein fiber or production method (moisture content or temperature difference) as described above, workability and cord quality may deteriorate

Method used

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  • Rubber-reinforcing fiber, rubber product, tire cord, and tire
  • Rubber-reinforcing fiber, rubber product, tire cord, and tire
  • Rubber-reinforcing fiber, rubber product, tire cord, and tire

Examples

Experimental program
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Effect test

Embodiment

[0207] The present invention is described in more detail below with reference to Examples, but the present invention is not limited to the following Examples and may be changed as appropriate without departing from the scope of the present invention.

[0208] (1-1) Synthesis of nucleic acid encoding hydrophobic protein and construction of expression vector

[0209] A nucleic acid encoding the designed protein having the amino acid sequence set forth in SEQ ID NO:17 was synthesized. An NdeI site was added to the 5' end of the nucleic acid and an EcoRI site was added downstream of the stop codon. These five nucleic acids were cloned into a cloning vector (pUC118). Then, the nucleic acid was cleaved by restriction enzyme treatment with NdeI and EcoRI, and then recombined with the protein expression vector pET-22b(+) to obtain an expression vector.

[0210] (1-2) Expression of hydrophobic proteins

[0211] Escherichia coli BLR (DE3) was transformed with the pET22b(+) expression...

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PUM

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Abstract

Provided is a fiber for rubber reinforcement, which can be produced using a biologically derived raw material and is not susceptible to breakage even when compounded with a rubber material. The first rubber-reinforcing fiber according to the present invention is characterized by using a protein fiber containing a hydrophobic protein. The second rubber-reinforcing fiber according to the present invention is characterized by using a protein fiber having an initial tensile modulus of elasticity of 2.0 GPa or more when wet. The rubber-reinforcing fibers are preferably provided with a coating layer on the surface, and the coating layer is formed from an aqueous adhesive composition.

Description

technical field [0001] The present invention relates to fibers for rubber reinforcement, rubber products, tire cords, and tires. Background technique [0002] Synthetic fibers such as nylon, polyester, and vinylon, which are made from fossil resources such as petroleum, have been conventionally and widely used as materials for fibers for reinforcing rubber products such as tires (rubber-reinforcing fibers). However, in view of the stable supply of fossil resources and the soaring prices in the future, it is desired to reduce the use of the above-mentioned synthetic fibers made from fossil resources. [0003] Examples of fibrous materials made of materials other than fossil resources include rayon fibers made of wood. However, replacing most of the currently used synthetic fibers with fibers made from wood could deplete forest resources and damage the environment. Therefore, there is a strong need for sustainable supply and ethical materials that are of natural origin and d...

Claims

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Application Information

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IPC IPC(8): D01F4/00B60C9/00C08J5/06D02G3/48D06M15/41D06M15/693
CPCC08J5/06D06M15/41D06M15/693D01F4/02D01F6/68C08J2407/02D02G3/48D10B2211/20D06M2101/10B60C2009/0035B60C2009/0078C08J2307/00C08J2309/06B60C9/0042C09J7/20C09J7/383C09J107/00C09J109/06C09J2489/006
Inventor 中村真明
Owner BRIDGESTONE CORP
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