Low-temperature-resistant sponge rubber sealing strip and production process thereof
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A technology of sealing strips and sponge glue, which can be used in other household appliances, household components, applications, etc., can solve the problems of sponge strips with large closing force, loss of elasticity, and difficult lifting of glass slides, so as to improve the difficulty of lifting and reduce the hardness. effect of change
Inactive Publication Date: 2021-04-20
HEBEI GUIHANGHONGTU AUTOMOTIVE COMPONENTS CO LTD
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[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a low-temperature-resistant sponge rubber sealing strip, the purpose of which is to solve the problems that the product loses elasticity in a low-temperature environment, the glass runway is difficult to lift and the sponge strip has a large closing force
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Embodiment 1
[0019] This embodiment is to provide a low temperature resistant sponge rubber sealing strip comprising the following raw materials in parts by weight: 90 parts of low ethylene EPDM raw rubber, 130 parts of semi-reinforcing carbon black, 90 parts of paraffin oil, 25 parts of white filler, active zinc oxide 4 parts, 1.7 parts of stearic acid, 0.7 parts of sulfur, 0.7 parts of sulfur-containing accelerator, 4 parts of accelerator, 2.3 parts of foaming agent, and 7 parts of hygroscopic agent.
[0020] This embodiment also provides a method for preparing a low temperature resistant sponge rubber sealing strip, comprising the following steps:
[0021] (1) take the parts by weight of the raw materials respectively;
[0022] (2) The rotating speed of the internal mixer is adjusted to 35-40RPM, and the low-ethylene EPDM raw rubber, active zinc oxide and stearic acid weighed by step (1) are placed in the internal mixer, and the raw rubber is plasticized. Control it below 90°, masticat...
Embodiment 2
[0029] This embodiment is to provide a low temperature resistant sponge rubber sealing strip comprising the following raw materials in parts by weight: 95 parts of low ethylene EPDM raw rubber, 135 parts of semi-reinforcing carbon black, 95 parts of paraffin oil, 27 parts of white filler, active zinc oxide 4.5 parts, 1.6 parts of stearic acid, 0.65 parts of sulfur, 0.65 parts of sulfur-containing accelerator, 4.5 parts of accelerator, 2.5 parts of foaming agent, and 6.5 parts of hygroscopic agent.
[0030] This embodiment also provides a method for preparing a low temperature resistant sponge rubber sealing strip, comprising the following steps:
[0031] (1) take the parts by weight of the raw materials respectively;
[0032] (2) The rotating speed of the internal mixer is adjusted to 35-40RPM, and the low-ethylene EPDM raw rubber, active zinc oxide and stearic acid weighed by step (1) are placed in the internal mixer, and the raw rubber is plasticized. Control it below 90°, ...
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Abstract
The invention discloses a low-temperature-resistant sponge rubber sealing strip, which is prepared from the following raw materials in parts by weight: 80 to 100 parts of low-ethylene EPDM raw rubber, 120 to 140 parts of semi-reinforced carbon black, 80 to 100 parts of paraffin oil, 20 to 30 parts of a white filler, 3.0 to 5.0 parts of activated zinc oxide, 1.5 to 2 parts of stearic acid, 0.6 to 0.8 part of sulfur, 0.5 to 0.8 part of a sulfur-containing accelerant, 3 to 5 parts of an accelerant, 2 to 2.5 parts of a foaming agent and 5 to 8 parts of a moisture absorbent. The invention further discloses a production process of the low-temperature-resistant sponge rubber sealing strip. The invention belongs to the technical field of sponge rubber sealing strips, and particularly relates to the production process of the low-temperature-resistant sponge rubber sealing strip and the low-temperature-resistant sponge rubber sealing strip. The low-temperature-resistant sponge rubber sealing strip is characterized in that a low-ethylene-content ethylene-propylene-diene monomer, high-flash-point paraffin oil,a low sulfur and high accelerator peroxide vulcanization system are used, so that the hardness change of a product at a low temperature is greatly reduced; and the problems that sliding groove rubber is difficult to lift and the door closing force of a sponge strip is large are solved.
Description
technical field [0001] The invention belongs to the technical field of sponge rubber sealing strips, and in particular relates to a low-temperature resistant sponge rubber sealing strip and a production process thereof. Background technique [0002] The car door seal strip mainly plays the role of sealing, dustproof, waterproof and decoration, and it is installed on the sheet metal around the car door. When the car door is closed, the sealing effect is realized by the bonding between the sealing strip and the door frame, so as to prevent external wind, rain, dust and other harmful substances from invading the car, and reduce the risk of damage to the doors and windows when the car is running. Generates vibrations to maintain a sense of cleanliness and comfort and refinement in the car. At the same time, the working environment of the door part device can also be improved through the setting of the sealing strip, and the service life of the working parts of the car door is p...
Claims
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Application Information
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