Production technology of flexible damping reclaimed rubber

Abstract

The invention discloses a production technology of flexible damping reclaimed rubber. The production technology comprises the following steps: (1) tire crushing and rubber powder screening; (2) rubberpowder desulfurization; (3) kneading; (4) filtration; (5) refining; and (6) forming, wherein the rubber powder desulfurization process in step (2) comprises: adding screened rubber powder and chemical assistants into a pre-heated vulcanization tank having a temperature of 180-200 DEG C according to a mass ratio of the screened rubber powder to the chemical assistants of 1000:(163-226), raising the pressure in the vulcanization tank from normal pressure to 2.0 MPa in a programmed pressurizing manner, continuous turning materials in the tank in the pressure raising process for 80-100 min in order to complete the desulfurization process; the chemical assistants include vegetable oil, rosin, a 820 resin assistant, aromatic oil, stearic acid and zinc oxide. The production technology is adoptedto effectively solve the technical problem of small damping coefficient of a final product.

Description

technical field

[0001] The invention belongs to the technical field of reclaimed rubber preparation, and in particular relates to a production process of flexible damping reclaimed rubber. Background technique

[0002] The reclaimed rubber production process using waste rubber tires or rubber shoes and other various waste rubber products as raw materials generally includes the following steps: rubber powder production (waste tires are cleaned, chopped, magnetically separated, screened, fiber separated, and the tires are removed. After the iron and fiber materials are obtained, 10-30 mesh rubber powder is obtained), desulfurization, kneading, filtering, refining, and forming processes to obtain reclaimed rubber products. Among them, the key step is the desulfurization process, which is to remove the sulfur in the rubber to restore the original mechanical properties of the rubber. The first factor affecting desulfurization is related to the composition and content of the adde...

Examples

Embodiment 1

[0022] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 100 parts of linseed oil, 30 parts of rosin, 24 parts of 820 resin additive, 4 parts of xylene, 1 part of stearic acid, and 4 parts of zinc oxide.

[0023] Put the rubber powder and chemical additives into the vulcanization tank preheated to 180°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 5 minutes; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / min ...

Embodiment 2

[0026] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 130 parts of castor oil, 30 parts of rosin, 30 parts of 820 resin additive, 15 parts of ethylbenzene, 5 parts of stearic acid, and 6 parts of zinc oxide.

[0027] Put the rubber powder and chemical additives into the vulcanization tank preheated to 180°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 10min; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / mi...

Embodiment 3

[0030] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 120 parts of linseed oil, 32 parts of rosin, 28 parts of 820 resin additive, 20 parts of aromatic oil, 6 parts of stearic acid, and 8 parts of zinc oxide.

[0031]Put the rubber powder and chemical additives into the vulcanization tank preheated to 200°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 10min; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / mi...

technical field

[0001] The invention belongs to the technical field of reclaimed rubber preparation, and in particular relates to a production process of flexible damping reclaimed rubber. Background technique

[0002] The reclaimed rubber production process using waste rubber tires or rubber shoes and other various waste rubber products as raw materials generally includes the following steps: rubber powder production (waste tires are cleaned, chopped, magnetically separated, screened, fiber separated, and the tires are removed. After the iron and fiber materials are obtained, 10-30 mesh rubber powder is obtained), desulfurization, kneading, filtering, refining, and forming processes to obtain reclaimed rubber products. Among them, the key step is the desulfurization process, which is to remove the sulfur in the rubber to restore the original mechanical properties of the rubber. The first factor affecting desulfurization is related to the composition and content of the adde...

Examples

Embodiment 1

[0022] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 100 parts of linseed oil, 30 parts of rosin, 24 parts of 820 resin additive, 4 parts of xylene, 1 part of stearic acid, and 4 parts of zinc oxide.

[0023] Put the rubber powder and chemical additives into the vulcanization tank preheated to 180°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 5 minutes; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / min ...

Embodiment 2

[0026] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 130 parts of castor oil, 30 parts of rosin, 30 parts of 820 resin additive, 15 parts of ethylbenzene, 5 parts of stearic acid, and 6 parts of zinc oxide.

[0027] Put the rubber powder and chemical additives into the vulcanization tank preheated to 180°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 10min; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / mi...

Embodiment 3

[0030] The formula of tire rubber powder and chemical additives is as follows: 1000 parts of rubber powder, 120 parts of linseed oil, 32 parts of rosin, 28 parts of 820 resin additive, 20 parts of aromatic oil, 6 parts of stearic acid, and 8 parts of zinc oxide.

[0031]Put the rubber powder and chemical additives into the vulcanization tank preheated to 200°C according to the formula ratio, and start the stirring function at the same time. The vulcanization tank is boosted by a program pressurization method. The pressure in the vulcanization tank is raised from normal pressure to 1.0 MPa at a pressurization rate of 0.5MPa / min in the front part of the pressurization, and the pressure is maintained for 8min; The pressurization rate of min increases the pressure in the autoclave from 1.0MPa to 1.5MPa, and keeps the pressure for 10min; the pressure in the post-pressurization section increases the pressure in the autoclave from 1.5MPa to 2.0MPa at a pressurization rate of 0.5MPa / mi...