CN102452134B

CN102452134B - Natural rubber plastication technology

Info

Publication number: CN102452134B
Application number: CN2010105953937A
Authority: CN
Inventors: 吕民; 朱宏明; 吴晓卫; 杨海燕
Original assignee: Double Coin Group Rugao Tyre Co Ltd
Current assignee: SP Reifenwerke GmbH
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2013-12-11
Anticipated expiration: 2030-12-20
Also published as: CN102452134A

Abstract

The invention discloses a natural rubber plastication technology, wherein a peptizer is mixed in crude rubber, and plastication is performed under a pressure of 6kg/cm<2>. The technology is characterized in that: after 20 seconds of plastication of the natural rubber, the P22 peptizer is added into a plasticator for heating and plastication; and in the plastication process, at least once empty lifting is performed at a rotation speed of 20-35r/min at a temperature of 120-150 DEG C, and a feed door is opened in the empty lifting at a temperature of 135-140 DEG C for empty lifting respectively. Through the invention, oxygen content in the material during rubber mixing is increased by adding a step of opening the feed door for empty lifting, thus the properties of the obtained rubber are better.

Description

A kind of natural rubber plastication technology

Technical field

The present invention relates to a kind of natural rubber plastication technology, specifically a kind ofly will be in natural gum mix the technique that the P22 peptizer is plasticated in plasticator.

Background technology

Traditional natural rubber plastication technology is constant speed, the 6kg/cm at 35r/min ²pressure under plasticated, while plasticating, rubber with add together with peptizer is, add rear intensification to plasticate, and the 30 seconds space-time of plasticating carries once, while plasticating to 70 seconds again sky carry once, until plasticating temperature is while reaching 169 ℃, binder removal, complete operation.

The shortcoming of this technique is: a, rubber and peptizer add together with just when starting, and cause sneaking into fast rubber, cause flying upward, leakage losses; B, with above-mentioned rotating speed and exhaust, the probability that makes sizing material contact with oxygen is high, it is strong that the solution effect is moulded in oxidation.

Summary of the invention

Main task of the present invention is to improve a kind of natural rubber plastication technology, specifically a kind ofly can produce that the Mooney number is little, extreme difference is little, and a kind of natural rubber plastication technology of mixing of peptizer and rubber.

In order to solve above-mentioned technical problem, a kind of natural rubber plastication technology of the present invention, mainly will mix peptizer in rubber, at pressure, be 6kg/cm ²under plasticated, it is characterized in that: described P22 peptizer adds plasticator to be heated to plasticate after natural gum is plasticated 20 seconds, carry out sky at least one times with the rotating speed of 20-35r/min respectively in the time of 120-150 ℃ and carry in the described process of plasticating, and open the feeding gate sky and carry when the sky of 135-140 ℃ is carried.

Further, to carry the time be 8-15 second to described sky.

Further, described sky is carried the rotating speed that rotating speed is 20r/min.

Further, the described feeding gate sky of opening is carried time 8-15 second.

The invention has the advantages that: put forward by increasing sky the oxygen content of opening when this step of bin gate increases refining glue in expecting, make produced properties of rubber better.

The specific embodiment

The comparative example:

Embodiment 1 (traditional plasticating technology, characteristics: rubber adds together with peptizer, feeding gate is not opened, and high rotating speed exhaust)

By rubber and P-22 plasticizer routinely ratio add plasticator, at 6kg/cm ²pressure under heat and plasticate, heat as routine, carry out once sky while plasticating to 30 seconds and carry, it is 15 seconds that sky is carried the time, plasticates and carries once to 70 seconds space-time, it is 15 seconds that sky is carried the time.Reach 169 ℃ to plasticating temperature, plasticate complete, carry out binder removal, go out flakiness, complete this technique.

Above-mentioned technique is as shown in table 1:

Embodiment 2 (improve technique, characteristics: rubber adds together with peptizer, reduces rotating speed, and feeding gate is opened)

In the present embodiment, heat as routine, pressure is identical with embodiment 1, and reinforced component is also conventional component, for guaranteeing comparing result, feeding quantity is also identical with embodiment 1, the step of plasticating is as follows: feeding in raw material as disposable reinforced, is 35r/min to the reinforced speed of plasticating that starts, and then when temperature rises to 120 ℃, rotating speed is adjusted to 20r/min, sky is carried 3-4 time, and it is 15 seconds that each sky is carried the time; And carry in process at sky, open at least one times feeding gate and carry out sky and carry, increase the oxygen in plasticator, realize the oxidation plasticizing.In the present embodiment, can put forward mode, the first with following two kinds of skies: sky is carried 15 seconds, opens the feeding gate sky and carries 15 seconds, and sky is carried 15 seconds, then adjusts rotating speed to 35r/min, discharge in the time of 169 ℃; The second: sky is carried 15 seconds, and sky is carried 15 seconds, opens the feeding gate sky and carries 15 seconds, and 150 ℃ of space-times are carried 15 seconds, then adjust rotating speed to 35r/min, and discharge in the time of 169 ℃, go out flakiness, completes this technique.Above-mentioned technique is as shown in table 2.1-2.1:

Table 2.1

Table 2.2

Embodiment 3 (improve technique, characteristics: rubber and peptizer separately add)

In the present embodiment, heat as routine, reinforced component, pressure are identical with embodiment 1,2, and the step of plasticating is as follows: the speed of plasticating is constant speed 35r/min, after first adding rubber and plasticating 20 seconds, add again peptizer, plasticate 70-80 after second, and the intermittence sky is carried or is opened each sky of feeding gate and carries 15 seconds, then at the temperature of 169 ℃, carries out discharge, go out flakiness, complete this technique.

Above-mentioned technique as the table 3.1-3.2 as shown in,

Table 3.1

Table 3.2

Above-mentioned three embodiment are carried out to contrast test:

Test 1: by bin aging 1 hour and 24 hours, test Mooney point:

Park 1 hour per car test data

Test 3:	ML1+4(100)	s1op
			1	60.65	-0.374
2	63.83	-0.367
			3	59.54	-0.372
4	58.71	-0.374
			5	59.81	-0.384
6	69.13	-0.36
			On average	61.95	-0.372

Park 24 hours per car test datas

Test 3:	ML1+4(100)	slop
			1	56.04	-0.374
2	63.81	-0.355
			3	67.14	-0.349
4	64.17	-0.365
			5	57.24	-0.373
6	66.05	-0.36
			On average	62.41	-0.363

Result: 1, Mooney point is descending: test 2>test 1>test 3; Add low 2-5 the point of Mooney after peptizer (150g).

Analyze: after increasing sky and carrying and reduce rotating speed, the probability that makes sizing material contact with oxygen reduces, and the solution effect is moulded in the oxidation of reduction back.

Test 2 is to the inhomogeneity test of being open to traffic of sizing material, tests as following table:

Test 1:	ML1+4
		1	54
2	54
		3	56
4	53
		5	57
6	53
		Extreme difference	4

Test 2:	ML1+4
		1	67
2	64
		3	66
4	62
		5	64
6	62
		Extreme difference	5

Test 3:	ML1+4
		1	57
2	57
		3	57
4	57
		5	58
6	58
		Extreme difference	1

Result: 1, uniformity: test 3>test 1>test 2

Analyze: peptizer adds in the beginning of plasticating in latter about 20 seconds, is conducive to the dispersion of peptizer.

Test 3:

1, respectively getting 3 cars from embodiment 1,2,3 plasticates again; Respectively get 3 cars again mixing from embodiment 1,2,3, test its uniformity and Mooney point, result is as following table:

The per car test data of again plasticating

Result: 1, uniformity: test 3>test 1>test 2;

2, Mooney point size: test 3>test 2>test 1

Analyze: peptizer just adds starting, and may cause sneaking into fast in rubber, causes flying upward, leakage loss.

Test 4 pairs and produce TP391 per car test data, the relation of test plastic cement Mooney and carbon black dispension degree, result is as following table.

Result: the plastic cement Mooney suitably low carbon black that is conducive to disperses.

Continuation is tested TP394, TP397 train number by above-mentioned requirements, and result is as following table:

Produce TP394 per car test data

Test 3:	ML1+4(100)	slop
			1	97.33	-0.333
2	99.09	-0.328
			3	99.39	-0.332
4	98.37	-0.334
			5	97.81	-0.334
6	97.7	-0.337
			7	99.16	-0.327
8	99.01	-0.326
			On average	98.48	-0.331

Produce TP397 per car test data

Test 3:	ML1+4(100)S	SLOP
			1	82.77	-0.389
2	82.86	-0.377
			3	83.63	-0.38
On average	83.09	-0.382

Result:

1, the sizing material Mooney added after peptizer is minimum, opens the bin gate sky and carries, and Mooney is the highest.

2,5 points of plastic cement Mooney decline, the finished composition Mooney descends and is less than this value (gum content in main refining eventually, about 50%-60%, will reduce by 1/2).

3, same test was done once, and conclusion is the same with this, added after peptizer and was conducive to improve effect.

Claims

1. a natural rubber plastication technology,, by mixing the P22 peptizer in natural gum, be mainly 6kg/cm at pressure ²under plasticated, it is characterized in that: described P22 peptizer adds plasticator to be heated to plasticate after natural gum is plasticated 20 seconds, carrying out sky at least one times with the rotating speed of 20-35r/min respectively in the time of 120-150 ℃ in the described process of plasticating carries, it is 8-15 second that sky is carried the time, and open the feeding gate sky and carry when the sky of 135-140 ℃ is carried, opening the feeding gate sky, to carry the time be 8-15 second.

2. a kind of natural rubber plastication technology according to claim 1, it is characterized in that: described sky is carried the rotating speed that rotating speed is 20r/min.