A kind of chloroprene rubber mixing process

A chloroprene rubber mixing technology, applied in the field of chloroprene rubber mixing technology, can solve the problems of rough surface of extruded products, poor mixing effect of internal mixer temperature rise, etc., and achieve stable performance of finished products

Active Publication Date: 2017-01-11
上海蓝昊电气江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome some shortcomings in the above-mentioned background technology and provide a neoprene mixing process, which can solve the problem of poor mixing effect caused by too high and too fast temperature rise in the internal mixer and surface defects of extruded products. Technical problems such as smoothness

Method used

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  • A kind of chloroprene rubber mixing process
  • A kind of chloroprene rubber mixing process
  • A kind of chloroprene rubber mixing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Neoprene was made using the technology of the present application.

[0034] a. Thin pass plastication of neoprene: Put 50kg of neoprene into the open mill, roll and weigh it after 5 passes to form a plasticized film, and park it overnight, in which the distance between the two rollers of the open mill is controlled is 1mm, and the roller temperature is controlled at 30°C;

[0035] b. One-stage internal mixing: After heating the internal mixer to 40°C, put the plasticized film that was parked overnight in step a into the internal mixer, and at the same time put 3kg of anti-scorch agent into the internal mixer, press down the top bolt and mix for 1min, then raise the upper Put 50kg of reinforcing filler into the top bolt, observe the change of mixing temperature and power, when the temperature rises to 75°C, raise the top bolt and put in 6kg of softener to continue mixing;

[0036] c. One-stage degumming: When the power curve tends to be stable and the temperature rea...

Embodiment 2

[0039] The specific production steps are:

[0040] a. One-stage internal mixing: After heating the internal mixer to 40°C, put 50kg of neoprene into the internal mixer, and at the same time, put in 3kg of anti-scorch agent, press down the upper top bolt and mix for 1min, then raise the upper top bolt and put in 50kg of supplementary For strong fillers, when the temperature rises to 75°C, raise the top bolt and put in 6kg of softener to continue mixing until the temperature reaches 100°C for debinding, and park overnight;

[0041] b. Second-stage internal mixing: Put the mixed rubber parked overnight in step a into the internal mixer again, and at the same time put in the vulcanizing agent, and directly discharge the rubber after mixing for 60 seconds to obtain a semi-finished product.

Embodiment 3

[0043] The specific production steps are:

[0044] a. Neoprene rubber mastication: put 50kg neoprene rubber into the open mill, roll and weigh it after 5 passes to form a masticated rubber roll, and park it overnight. The roller temperature is controlled at 30°C;

[0045] b. One-stage internal mixing: After heating the internal mixer to 40°C, put the plasticized film that was parked overnight in step a into the internal mixer, and at the same time put 3kg of anti-scorch agent into the internal mixer, press down the top bolt and mix for 1min, then raise the upper Add 50kg of reinforcing filler and 6kg of softener to the top bolt and continue mixing;

[0046] c. One-stage degumming: degumming when the temperature reaches 100°C, and park overnight;

[0047] d. Second-stage internal mixing: Put the mixed rubber parked overnight in step d into the internal mixer again, and at the same time put in the vulcanizing agent, and directly discharge the rubber after mixing for 60 seco...

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Abstract

The invention discloses a chloroprene rubber mixing process. The chloroprene rubber mixing process comprises the following steps: thin passing and plastifying of chloroprene rubber: the chloroprene rubber is put on an open mill, is weighed and coiled to form a plastified rubber coil after 5 times of thin passing treatment, and is placed overnight; the distance of two rollers of the open mill is controlled within 1-1.5 mm; and the temperature of the rollers is below 50 DEG C; first-stage banburying: after a banbury mixer is heated to 40-50 DEG C, the plastified rubber coil placed overnight is put in the banbury mixer, and scorch retarder is added for mixing 1 minute; reinforcement filling agent is added; and when the temperature is raised up to 71-79 DEG C, softening agent is added for mixing; first-stage rubber discharge: the rubber discharge time is determined according to the temperature and power change to perform the rubber discharge; and the rubber is placed overnight; and second-stage banburying: the mixed rubber placed overnight is put in the banbury mixer again, and vulcanizing agent is added to mix for 60 seconds; and then the rubber discharge is performed to obtain a semi-finished product. The chloroprene rubber mixing process, disclosed by the invention, is smooth in surface, and has no unevenly dispersed ripe particles or other particles.

Description

technical field [0001] The invention belongs to the field of rubber preparation, and in particular relates to a chloroprene rubber mixing process. Background technique [0002] The poor processing performance of chloroprene rubber is well known, especially the adhesion to the rollers of the open mill can not be peeled off, which leads to production stoppage. During the process, a large number of tiny cooked particles will be produced. These cooked particles are difficult to be broken during the mixing process, and eventually the surface of the extrudate is not smooth, and there are always fine rubber particles. [0003] In addition, due to the presence of polar chlorine atoms in chloroprene rubber, it is highly sensitive to temperature during processing. When the temperature exceeds the temperature range of the elastic state (0~79°C), a viscous fluid state transition occurs, which greatly reduces the shear force during the mixing process, resulting in uneven dispersion of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B7/74B29B7/80C08L11/00C08K13/02C08K3/22C08K5/40C08K5/47C08K3/04C08K3/36C08K3/34C08K5/01
Inventor 钱章兴王兵兵田敏季飞周春杰
Owner 上海蓝昊电气江苏有限公司
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