Mold-pressed sponge sealing rubber strip

Abstract

The invention relates to the technical field of production and processing of rubber, particularly a mold-pressed sponge sealing rubber strip. The mold-pressed sponge sealing rubber strip comprises the following raw materials in parts by mass: 100 parts of EPDM (ethylene-propylene-diene monomer) unvulcanized rubber, 55-80 parts of reinforcing agent carbon black HS-45, 55-80 parts of paraffin oil, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-1.5 parts of surfactant PEG-4000, 1-4 parts of dispersing agent WB16, 8-12 parts of moisture absorber, 1.1 parts of sulfur powder, 1.1 parts of accelerator ZDBC, 1.1 parts of vulcanizing agent DTDM and 0-15 parts of foaming agent ADC. By using the ultralow-mooney-viscosity unvulcanized rubber and abundant chemical foaming agent, the rubber at the mold-pressed the sealing strip corner part of the sealing strip can be foamed in the mold to become gelatin sponge, so that the vertical bar position and the corner position of the sealing strip have close density of rubber, similar hand feeling and consistent door closing force, thereby enhancing the esthetic quality of the sealing strip, lowering the pollution product quantity to some extent, ensuring the excellent sealing property of the product in the use process, enhancing the hand feeling and lowering the processing cost of the manufacturer.

Description

technical field [0001] The invention relates to the technical field of rubber production and processing, in particular to a molded sponge sealing strip. Background technique [0002] The sponge rubber material on the car door seal, the car door seal is currently mainly made of foamed sponge seals produced by EPDM rubber, installed on the car door sheet metal, and squeezed together with the door frame to seal when the door is closed It mainly plays the role of door sealing, dustproof, shockproof and noise prevention. It is an indispensable part of the car door. The production of the existing door sealing strip is to add chemical foaming agent to EPDM rubber for vulcanization and foaming Prepared sponge formulation. At present, the traditional sponge sealant strips usually use dense glue different from the straight section sealant strips at the corner joints. The extrusion force of the parts is different, which leads to insufficient sealing after the door is closed. At the s...

AI Technical Summary

Problems solved by technology

At present, the traditional sponge sealant strips usually use dense glue different from the straight section sealant strips at the corner joints. The extrusion force of the parts is different, which leads to insufficient sealing after the door is closed. At the same time, the sealant strip on the edge of the door has a very poor hand feeling, which has a certain impact on normal use, and the processing is relatively expensive. Indirectly increased more pollution products

Images