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Fiber reinforced rubber

A fiber reinforced and rubber technology, applied in the field of fiber reinforced rubber, can solve the problems that the strength and deformation resistance of rubber cannot meet the requirements of use, the effect is not very ideal, and the fibers cannot be dispersed evenly, etc., to increase the tear resistance and excellent physical properties. Mechanical properties, the effect of good elasticity

Inactive Publication Date: 2009-10-14
南京固柏橡塑制品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that, according to different use environments and medium requirements, by adjusting the rubber formula and adding some aramid fibers, synthetic fibers, carbon fibers, glass fibers, etc., the range of use of general-purpose synthetic rubber can be improved and the service life can be extended. However, the effect It is not very ideal, the main reason is that the fibers cannot be dispersed evenly in the rubber, and form a good adhesion with the rubber, so that the reinforcing effect is limited
A well-known method is to pre-impregnate the fiber into a special adhesive (ie "dipping"), and then use it after drying. Since the adhesive has a certain surface modification effect on the fiber, it can improve the fiber in the rubber. The uniformity of dispersion and the adhesion between it and rubber, but the effect is still not very satisfactory, the strength and deformation resistance of the obtained rubber cannot meet the requirements of use, and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0023] The ratio of raw materials by weight is shown in Table 1. The preparation process is as follows:

[0024] (1) Mix polypropylene fiber, glass fiber, white carbon black and activated calcium carbonate together at high speed in a container to make a pre-dispersion of uniformly dispersed short fiber and powder.

[0025] (2) Put styrene-butadiene rubber and high styrene resin into the closed rubber mixer for plasticizing and kneading. The plasticizing time is 5-6 minutes, and the plasticizing temperature is controlled at 120-130°C. Mixing agent, anti-aging agent, colorant and pre-dispersion, the mixing time is not less than 15min, and the mixing temperature is controlled below 130°C.

[0026] (3) After mixing, discharge the material to the open rubber mixer and add vulcanizing agent. When adding vulcanizing agent, the roller temperature should be controlled below 100°C to avoid scorching. Then unload the sheet to cool and park; during this period, a quick inspection of the...

Embodiment 10-18

[0031] The ratio of raw materials by weight is shown in Table 2.

[0032] Table 2 The ratio of raw materials used in Examples 10-18

[0033]

[0034] The preparation process is as follows:

[0035] (1) Aramid fiber, glass fiber, white carbon black and activated calcium carbonate are stirred together at high speed in a container to make a pre-dispersion of short fiber and reinforcing filler with uniform dispersion.

[0036] (2) Nitrile rubber is subjected to low-temperature first and second-stage low-temperature thin-pass masticating on an open rubber mixer. The roller temperature is controlled at 50±5°C. The first-stage masticating roller distance is 1-2 mm, and the number of roll passes is 25 times. ;After parking for 8 hours, carry out the second stage of mastication, the roller distance is 1-2mm, and the number of roller passes is 20 times. Weigh and park for use. Refining is invalid. Then put the masticated nitrile rubber and chlorinated polyethylene resin into the c...

Embodiment example 19-21

[0040] The ratio of raw materials by weight is shown in Table 3. The preparation process is as follows:

[0041] (1) Mix glass fiber, carbon fiber and high wear-resistant furnace carbon black together at high speed in a container to make a pre-dispersion with uniform dispersion.

[0042](2) Plasticize the chloroprene rubber 20 times on the open rubber mixer, control the roller temperature at 50±5°C, put the chloroprene rubber into the internal mixer after plastication, and add the active agent, fiber Mix with the pre-dispersion of reinforcing agent, the mixing time is not less than 15min, and the mixing temperature is controlled below 130°C.

[0043] (3) After mixing evenly, discharge the material to the open mill to add vulcanizing agent. When adding vulcanizing agent, the roller temperature should be controlled below 100°C to avoid scorching. Then unload the sheet and park it for cooling. During this period, a quick inspection of the physical and mechanical properties is c...

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Abstract

The invention relates to a fiber reinforced rubber, for which the strength can be remarkably improved, the permanent compression set can be reduced and the anti-tear performance of rubber sheet can be enhanced. A method for preparing the fiber reinforced rubber comprises the following steps: a. mastication of rubber; b. reinforcing filler, fiber and accessory ingredient are added into the rubber for mixing; wherein, the fiber and the reinforcing filler is evenly mixed to prepare pre-dispersoid, and the pre-dispersoid is added into the rubber. As a preferred proposal, the method adopts styrene-butadiene rubber, nitrile rubber and neoprene which have the good properties of wearing resistance, pressure resistance, oil and water resistance and air tightness resistance as the rubber. The rubber sheet produced by the method can work under ultra-high temperature and pressure in various media for a long time with the maximum working temperature being 300 DEG C, and maintains good elasticity, less compressive deformation and excellent physical and mechanical properties which are reduced by not more than 20% compared with those at the normal temperature.

Description

technical field [0001] The invention relates to a fiber reinforced rubber. Background technique [0002] Some conventional general-purpose synthetic rubbers, such as rubber sheets produced by styrene-butadiene, nitrile and neoprene, have critical service temperatures of 120°C, 140°C and 160°C, respectively. Due to their own characteristics, the use in different media Conditions are strictly limited. When used in some high-temperature and high-pressure, oil, solvent, acid-base and other media, defects such as swelling, cracking, large compression deformation, and obvious decline in physical and mechanical properties will occur prematurely. In severe cases, it may even melt and completely lose rubber. Some advantages of this highly elastic material. Especially when it is made into rubber sheet and used in high temperature environment, it is mainly used for container sealing and flange sealing. The compression deformation is small, and its physical and mechanical properties ...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08K13/04C08K7/02C08K7/06C08K7/14C08L9/06C08L9/02C08L11/00C08L23/16
Inventor 张收才江文根江忠才陈玉斌陆祥武
Owner 南京固柏橡塑制品有限公司
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