KR900003956B1 - Preparation of rubber for preventing slide - Google Patents

Abstract

In production of side-resistant rubber material used by rubber moulding compsn., the side-resistant rubber material is prepd. by: extruding the admixture of 10-30 wt.% carbonblack of 100-300 A≰ cubic diameter, 30-60 wt.% aramide carbon fiber, 20-30 wt.% polyester fiber and 20-30 wt.% nylon carbon fiber; vucanizastion; then surface grinding. The sliding resistant rubber has excellent wear resistance and frictional properties, and useful for tire tread, rubber sheet or belt in indusfry, or shoes.

Description

Manufacturing method of anti-slip rubber material

The present invention uses a rubber material that needs to prevent slippage used in a tire tread such as a vehicle running in rainy season, heavy snow, or ice, rubber sheets or belts that require friction in industrial machinery, or footwear and other household goods. The present invention relates to a manufacturing method of an all-weather antiskid rubber material suitable for various products.

Slip resistance and abrasion resistance are required for the characteristics required as an anti-slip rubber material.

Conventionally, vehicle tire treads operated in the rain, heavy snow, or ice sheet were generally run by winding chains or steel gages, nails, etc. in the treadman to improve friction, but there was a lot of vibration and a lot of manpower wasted on installation and removal. There is a disadvantage.

In particular, belts that require friction for industrial use cannot obtain the desired level of friction when a special frictional force is required. In order to improve the above disadvantages, tire treads were manufactured by mixing rock powder, sand, iron powder and fiber so that the tire tread itself had strong frictional force, but the tire itself was caused by deterioration of the rubber itself rather than physical property improvement by rational mixing ratio of these ingredients. There was a disadvantage of only shortening the life of.

As disclosed in Korean Patent No. 79-1559, a rubber composition consisting of a silica filler, a plasticizer, a sulfur donor, and an accelerator is used for butadiene rubber. The hardening effect was increased to increase the friction coefficient according to the strength. On the other hand, in the case of severe wear and heavy snow, the required level of anti-slip effect was not obtained.

In the present invention, the organic rubber such as aramid (nyramid), nylon, polyester, and the like is blended in an optimum ratio to a conventional rubber composition, and then kneaded and molded, and the surface is polished to expose the above fibers, thereby preventing slippage. The aim is to produce as good a rubber material as possible.

The aramid fiber used in the present invention is a wholly aromatic polyamide fiber called poly P-phenylene terephthalicamide (PPTA), which is made by dissolving powdered raw material polymer in sulfuric acid and then spinning the solution. As the aromatic ring forms an amide bond, the molecular ring motion is extremely suppressed, and the orientation of low-level "crystal spinning" caused by the flow direction when spitting through the spinneret is fixed on the fiber as it is. 17-90% more than theoretical.

The actual results are as follows.

In the present invention, the nylon fibers and polyester fibers in addition to the aramid fibers were mixed and blended.

Nylon is continuous filament with tensile strength of 4.5-6.0g / denier, moisture resistance 85-90% drying, hardness 30g / denier, and polyester is continuous filament with tensile strength of 4.4-5.0g / denier, moisture resistance 100% drying And hardness 12.2 g / denier, together with the aramid fibers described above, to improve durability and mixing of rubber.

The raw material rubber used in the present invention may be used by appropriately blending synthetic rubber, including natural rubber, for example, neoprene, butyl, urethane, nitrile, polysulfide, acrylate, silicone, fluorocarbon, polyisoprene, acrylic Suitable is nitrile-butadiene, colooprene, styrene-butadiene rubbers or mixtures thereof.

Vulcanization accelerators include inorganic accelerators such as lead, calcium, magnesium or zinc oxide, thiourea, thiophenol, mercaptan, dithiocarbamate, xanthate, trithiocarbamate, thiophenol, dithio acid, mercaptothiazole, mercury Sulfur-containing compounds such as capto benzothiazole, thiuram sulfide, or mixtures thereof, and a few non-sulfur materials such as urea, guanidine, aldehyde amines may also be used. In addition to the above additives, fatty acids such as stearic acid and oleic acid, fillers such as silicic anhydride, silicate, zinc oxide, magnesium carbonate, etc., which improve the insufficient properties of vulcanized rubber, plasticizers, antioxidants such as panel α or β-naphthylamine, etc. It can mix.

In the present invention, by adding a small amount of carbon black having a particle size of 100-300 mm 3, for example, chennel black, furnace black, turmal black, acetylene black, lamp black, etc., the rubber is formed in a continuous chain structure in the rubber. The strength of was to be increased 4-5 times.

The rubber material manufacturing process according to the present invention is specifically described, in addition to 100% by weight of ordinary rubber raw material composition, 10-30% by weight of carbon black of 100-300Å, 30-60% by weight of short fiber of aramid fiber, polyester 20-30% by weight of short fibers and 20-30% by weight of nylon 6 or 66 are blended and thoroughly kneaded by a Banbury blender or an open mill, placed in an extruder and extruded into a predetermined shape. Mold.

If the extruded molded product is sufficiently vulcanized after the vulcanization treatment to expose the blended high friction single fiber, a desired anti-slip rubber material is obtained.

)가 시속 40,60,80Km/시간으로 통상의 아스팔트로면을 주행하도록한 후 퀵브레이크에 의한 제동거리를 측정한 결과는 다음과 같다.In order to test the frictional performance of the tire made of the rubber material of the present invention, the following test was performed with a normal tire. Pony Excel cars equipped with low pressure tires with a tire pressure of 2.1-2.5kg / cm ² and a width of 5.6 inches and an inner diameter of 13 inches (1.4

After braking the normal asphalt surface at 40,60,80km / h, the braking distance measured by quick brake is as follows.

As described above, when the rubber material of the present invention was used as a tire tread, a braking distance shortening effect of about 30-40% was obtained.

This shortening effect of braking distance gives unevenness to the fibers exposed to the rubber surface, absorbs some of the moisture during the rainy season and heavy snow, and makes the contact surface wider on the asphalt surface of the road. Can prevent accidents.

Claims (1)

In the production of anti-slip rubber materials from the rubber molded product composition, 10-30% by weight carbon black, 30-60% by weight aramid short fiber, 20-30% by weight polyester fiber and 20-% nylon short fiber A method for producing a non-slip rubber material, characterized in that 30% by weight is blended and vulcanized after extrusion.