A preparation method of waste sealing strip rubber powder/rubber type chlorinated polyethylene blended foam material
A technology of chlorinated polyethylene and foaming materials, which is applied in the field of preparation of waste rubber powder/rubber elastomer blending and foaming, can solve problems such as increased hardness of products, melt fracture, and influence on mechanical properties of products, and achieve excellent results. Effect of tensile and compressive strength, compression set improvement, good industrialization prospects
Active Publication Date: 2015-11-25
CHINA RUBBER RESOURCE REGENERATION QINGDAO
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Problems solved by technology
However, due to the high Mooney viscosity of pure rubber-type chlorinated polyethylene foam products, uneven foaming can easily lead to melt fracture and large cells, which seriously affect the mechanical properties of the product.
Therefore, people usually use the method of adding carbon black and other fillers to improve the foaming characteristics. However, although the addition of carbon black plays a nucleating role, as a reinforcing filler, the hardness of the product will increase and the elastic properties will be lost.
Method used
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[0034] The following implementation examples are further descriptions of the present invention, rather than limiting the scope of the present invention.
[0035] Implementation examples 1-7 are shown in the following table, wherein the compressive stress and strain are measured by GB / T18942.2-2003, insert the test piece and make the force act along the centerline of the testing machine, and pass through the compression plate at (5±1)mm / min Compress the test piece at a high speed until the compressive strain reaches the requirements specified in the material specification. Then decompress at the same speed until the distance between the bottom plate and the pressing plate is equal to the initial thickness of the test piece. Immediately repeat this step 3 times, and when the fourth compression reaches the specified strain, read the load value in Newton (N)
[0036] Under the specified strain, the compressive stress-strain characteristics are calculated according to formula (1):...
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The invention provides a preparation method for a waste sealing strip rubber powder / rubber type chlorinated polyethylene blending foaming material. The preparation method comprises the steps of adding 2-3 parts by weight of an activating agent and 5-10 parts by weight of a plasticizing agent in 100 parts by weight of the waste sealing strip rubber powder, and milling the above materials; plasticizing 100 parts by weight of the rubber type chlorinated polyethylene in an internal mixer or a double-roll mill; blending 10-50 parts by weight of activated waste sealing strip rubber powder and 100 parts by weight of plasticized rubber type chlorinated polyethylene uniformly; adding 1-6 parts by weight of a stabilizing agent, 1-5 parts by weight of a foaming agent, 0.5-3 parts of an auxiliary foaming agent, 10-30 parts by weight of the plasticizing agent and 1-3 parts by weight of cross-linking agent, and mixing the above materials; and then performing compression and foam molding to obtain the foaming material.
Description
technical field [0001] The invention relates to a preparation method of a polymer foaming material, in particular to a preparation method of waste rubber powder / rubber elastic body blending and foaming. Background technique [0002] Waste rubber is a kind of polymer waste, which mainly comes from rubber products such as waste tires, waste tapes, and waste hoses. Its quantity ranks second among waste polymer materials. Waste rubber contains a three-dimensional network molecular chain structure, so it is difficult to degrade. Waste rubber contains a large amount of organic compounds that will produce toxic gases and pollute the environment after burning. Regardless of whether it is from the perspective of environmental protection or economic benefits, the rational recycling of waste rubber has become the focus of research all over the world. [0003] Rubber-type chlorinated polyethylene destroys the crystallization properties of HDPE because it contains 20% to 45% chlorine. ...
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IPC IPC(8): B29C44/02B29B7/00C08L23/28C08L21/00C08K5/14C08K5/098C08J9/10C08J9/08
Inventor 张振秀李文博辛振祥谭钦艳
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO