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A technology of EPDM rubber and matrix materials, which is applied to the sealing of engines, chemical instruments and methods, household components, etc., and can solve the problems of flame retardancy, non-environmental protection, environmental protection without flame retardancy, and inconsistent requirements.
Active Publication Date: 2008-07-30
DANYANG WANBEN AUTOMOTIVE PARTS
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Problems solved by technology
In the current sealing strip industry, there is a phenomenon that the requirements of various industries are no
Method used
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Embodiment 1
[0023] Embodiment 1: A kind of EPDM rubber is the sealing strip of matrix material, and its composition comprises following component (expressed in wt.%): EPDM rubber: 26%, zinc oxide: 1% phosphoric acid ester,: 1%, polyethylene glycol: 1%, aluminum hydroxide: 15%, zinc borate: 7%, phosphate ester: 10%, carbon black: 20%, paraffin oil: 15%, calcium oxide: 3%, sulfur: 0.3%, Accelerator: 0.7%.
Embodiment 2
[0024] Embodiment 2: a kind of EPDM rubber is the sealing strip of matrix material, and its composition comprises following component (expressed in wt.%): EPDM rubber: 26%, zinc oxide: 1.5%, stearic acid : 5%, polyethylene glycol: 1.5%, aluminum hydroxide: 10%, zinc borate: 15%, phosphate ester: 5%, carbon black: 10%, paraffin oil: 20%, calcium oxide: 4%, sulfur : 0.5%, Accelerator: 1.5%.
[0025] Production method of the present invention comprises the following steps successively:
[0026] 1) Mixing: Mix EPDM rubber, aluminum hydroxide, zinc borate, phosphate ester, carbon black, paraffin oil, hygroscopic agent, stearic acid, polyethylene glycol, and zinc oxide in a kneader according to the above formula Mixing and adjustment: Cooling water pressure 0.4MPa, air pressure 0.6MPa, mixing time 600 seconds, when the temperature of the mixed rubber reaches 135°C, the rubber is discharged;
[0027] 2) Tablet pressing: cool down the compound rubber tablet on the open mill, and par...
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Abstract
The invention discloses a sealing strip which takes EPDM as the host material and the preparing method, which is characterized in that the composition contains the following constituents (expressed by wt percent): EPDM 26 percent, zinc oxide 1-1.5 percent, stearic acid 1-6 percent, polyethyleneglycol 0.5-1.6 percent, hydrafil 10-32 percent, zinc borate 5-16 percent, orthophosphoric lipid 3-16 percent, black carbon 7-20 percent, paraffin oil 7-21 percent, calcium oxide 2-5 percent, sulfur 0.25-0.5 percent and accelerant 0.65-1.5 percent. The invention ensures the mechanical performance and extrusion performance, is convenient for extrusion, adopts the hydrafil, the zinc borate, and a inflaming retarding system; is the most realistic non-halogen inflaming retarding; can produce a lot of crystal water on the surface of the burning substance; can separate the burning substance from contacting oxygen, and then can perform the inflaming retarding effect; can inhibit the gases produced by the burning substance, accordingly does not produce smog.
Description
technical field [0001] The invention relates to rubber products, in particular to a sealing strip with EPDM as a matrix material and a production method thereof. Background technique [0002] The base materials of existing sealing strips for vehicles, subways, equipment, and buildings generally include EPDM, neoprene (CR), polyvinyl chloride (PVC), etc., but their use conditions are not the same. Such as PVC material: the price is low, the process is mature and simple, but because of its defects such as poor aging performance, heat resistance, and environmental protection, developed countries such as the European Union and Japan have restricted the use of PVC from legislation. Domestic PVC is also limited to use in facilities with relatively low requirements. However, CR has excellent heat resistance, oil resistance, and flame resistance. As a crystalline rubber, CR has self-reinforcing properties and can obtain ideal mechanical properties. However, there are many defects ...
Claims
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Application Information
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