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Preparation method of rubber foam material

A technology of rubber foam material and foaming agent, which is applied in the field of rubber foam material preparation, and can solve problems such as ignoring the influence of performance and poor mechanical properties

Inactive Publication Date: 2019-04-12
崔鑫淼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor mechanical properties of EPDM foam materials, there are many restrictions on its use. Most of the current research is to improve its mechanical properties by changing the content of fillers in the formula or processing methods, while ignoring the impact of cell distribution structure design. its performance impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of rubber foam material of the present invention, comprises the steps:

[0018] 1) Prepare ingredients according to the proportion by mass: EPDM 100, vulcanizing agent 1, co-vulcanizing agent 1, zinc oxide 3, stearic acid 2, carbon black 25, paraffin oil 20, foaming agent 2;

[0019] 2) The initial temperature of the internal mixer is 65°C and the speed is 45 r / min. Add EPDM raw rubber. After the torque is stable, add foaming agent, zinc oxide and stearic acid; then add filler and paraffin oil twice , finally add vulcanizing agent and auxiliary vulcanizing agent, knead for about 5 minutes, and the debinding temperature does not exceed 130°C;

[0020] 3) After the material is discharged, pass through the mill for 6 times to remove the sheet, and park it for 10 hours for later use; cut the sample of the mixed rubber, place it on a flat vulcanizing machine with a filling coefficient of 103%, vulcanize and foam by molding, and vulcanize The temperatu...

Embodiment 2

[0028] The preparation method of rubber foam material of the present invention, comprises the steps:

[0029] 1) Prepare ingredients according to the proportion by mass: EPDM 100, vulcanizing agent 2, co-vulcanizing agent 1.5, zinc oxide 4, stearic acid 3, carbon black 28, paraffin oil 25, foaming agent 5;

[0030] 2) The initial temperature of the internal mixer is 66°C and the speed is 45 r / min. Add EPDM raw rubber. After the torque is stable, add foaming agent, zinc oxide and stearic acid; then add filler and paraffin oil in 2 times , finally add vulcanizing agent and auxiliary vulcanizing agent, knead for about 8 minutes, and the debinding temperature does not exceed 130°C;

[0031] 3) After the material is discharged, it is thinly passed on the open mill for 7 times, and the film is parked for 11 hours for later use; the mixed rubber is cut out, placed on a flat vulcanizing machine with a filling coefficient of 103%, vulcanized and foamed by molding method, vulcanized Th...

Embodiment 3

[0039] The preparation method of rubber foam material of the present invention, comprises the steps:

[0040] 1) Prepare ingredients according to the proportion by mass: EPDM 100, vulcanizing agent 3, co-vulcanizing agent 2, zinc oxide 5, stearic acid 5, carbon black 30, paraffin oil 30, foaming agent 7;

[0041] 2) The initial temperature of the internal mixer is 70°C, the speed is 45 r / min, add EPDM raw rubber, and after the torque is stable, add foaming agent, zinc oxide and stearic acid; then add filler and paraffin oil in 2 times , finally add vulcanizing agent and auxiliary vulcanizing agent, knead for about 10 minutes, and the debinding temperature does not exceed 130°C;

[0042] 3) After the material is discharged, it is thinly passed on the open mill for 8 times to remove the sheet, and it is parked for 12 hours for later use; the mixed rubber is cut out, placed on a flat vulcanizing machine with a filling coefficient of 103%, vulcanized and foamed by molding, vulcani...

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Abstract

Belong to the field of material preparation, the invention relates to a preparation method of a rubber foam material. The method is characterized by: preparing ingredients, adding EPDM raw rubber intoan internal mixer, after the torque becomes stable, adding a foaming agent, zinc oxide and stearic acid; then mixing filler, paraffin oil, a vulcanizing agent and a co-vulcanizing agent; after discharging, conducting thin-passing on an open mill and performing batching out, and performing standing for standby use; subjecting the rubber compound to sample cutting, then putting the cut rubber compound on a plate vulcanizing machine, and conducting vulcanization foaming by die pressing; conducting laminating compounding on the rubber compound, and putting the product into a die for foaming vulcanization, thus obtaining the rubber foam material with gradient-varying foaming density in the vertical direction. Through improvement of the prior art, the EPDM rubber foam material with gradient-varying foaming density along the thickness direction is prepared, under the circumstance of a constant laminate thickness, with the decrease of the dosage of the interlayer foaming agent, the tensile strength and elongation at break gradually increase, and under a high stress, the gradient EPDM foam material has stronger energy absorption effect than the traditional homogeneous rubber foam materials.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a rubber foam material. Background technique [0002] Rubber sponge products are widely used in the manufacture of automobile windshields, buffer pads, sealing gaskets for construction projects, and heat insulation for weak current components due to their good cushioning, compression, energy absorption, heat insulation, and noise reduction and sound absorption. materials and damping materials, etc. EPDM has excellent chemical stability, aging resistance, chemical resistance, electrical insulation, good impact elasticity and low temperature resistance. Therefore, EPDM is more and more widely used in the foam rubber product industry. However, due to the poor mechanical properties of EPDM foam materials, there are many restrictions on its use. Most of the current research is to improve its mechanical properties by changing the content of fillers in the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08K13/02C08K3/22C08K5/09C08K3/04C08K5/14C08J9/10
CPCC08J9/103C08J9/0023C08J9/0061C08J9/0066C08J9/0095C08J2203/04C08J2323/16C08J2491/06
Inventor 崔鑫淼
Owner 崔鑫淼
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