Solid natural rubber and method and device for producing same

A solid natural rubber and manufacturing device technology, applied in the field of solid natural rubber, can solve problems such as rubber viscosity deviation, and achieve the effects of shortening time, low cost, and less loss

Active Publication Date: 2013-08-14
TOKAI RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the obtained rubber tends to vary in quality such as viscosity

Method used

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  • Solid natural rubber and method and device for producing same
  • Solid natural rubber and method and device for producing same
  • Solid natural rubber and method and device for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0129] The solid natural rubber produced by the manufacturing apparatus 1 of the above-mentioned embodiment was cross-linked, and its cross-linking properties were evaluated. First, 100 parts by mass of solid natural rubber, 2.5 parts by mass of sulfur, and 1 part by mass of N-cyclohexyl-2-benzothiazole sulfenamide ("NOCCELER" manufactured by OUCHI SHINKO CHEMICAL INDUSTRIAL CO., LTD. (registered trademark) CZ-G"), 5 parts by mass of zinc oxide (the zinc oxide is zinc oxide type 2 according to JIS K1410) and 1 part by mass of stearic acid were kneaded to prepare a rubber composition. Two types of rubber compositions were prepared using two types of solid natural rubbers produced in different batches as the solid natural rubber (Example 1 and Example 2). Next, the prepared two rubber compositions were crosslinked at a temperature of 150° C., and the crosslinking speed and the like were measured. Measurements were carried out in accordance with JIS K6300-2 (2001) using a rotorl...

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PUM

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Abstract

This device (1) for producing a solid natural rubber includes: a rotary member (40) having a heated endless annular surface; a spray nozzle (26) that sprays a natural rubber latex onto the endless annular surface; and a scraper (72) arranged downstream of the spray nozzle (26) in a manner so as to slidingly contact the endless annular surface. The coated liquid of the natural rubber latex adhering to the endless annular surface dries and turns into a solid natural rubber (G2) as the endless annular surface rotates, and the solid natural rubber (G2) is peeled off from the endless annular surface by the scraper (72). This device (1) for producing a solid natural rubber can produce high-quality solid natural rubber (G2) efficiently and at a low cost.

Description

technical field [0001] The present invention relates to solid natural rubber used as a raw material for rubber products. Additionally, it relates to methods and apparatus for producing solid natural rubber from natural rubber latex. Background technique [0002] Natural rubber has excellent properties such as high tensile strength and low heat generation due to vibration. Therefore, it has been used as a raw material for various rubber products such as tires, vibration-isolating rubber, conveyor belts, and rubber gloves. Solid natural rubber distributed as a raw material for rubber products is broadly classified into visually graded rubber (VGR, Visually Graded Rubber) and technically graded rubber (TSR, Technically Specified Rubber). In VGR, the representative one is smoked sheet rubber (RSS) which is graded based on the "International Standard for Quality and Packaging of Natural Rubber Grades (commonly known as the Green Book)". For example, RSS can be produced in the ...

Claims

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Application Information

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IPC IPC(8): B29B15/04C08C1/12
CPCC08C1/12
Inventor 间濑昭雄胁坂治久野晃伊藤圭辅
Owner TOKAI RUBBER IND LTD
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