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Impact-resistant modified polyvinyl chloride tube material and preparation process thereof

A kind of polyvinyl chloride, impact modification technology, applied in rigid pipes, pipes, mechanical equipment and other directions, can solve the problems of harsh processing conditions, poor impact resistance, difficult to balance rigidity and toughness, and achieve improved mechanical properties, high The degree of plasticization, the effect of low cost

Active Publication Date: 2012-06-20
山东华信塑胶股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, domestic and foreign countries have successively developed high-impact PVC pipes, mainly using elastomers for toughening, and the most widely used is chlorinated polyethylene (CPE). This method can improve the toughness of PVC pipes, but the amount of CPE added Larger, due to the network toughening mechanism of CPE, the processing conditions are relatively harsh, and it is difficult to achieve a rigid-tough balance
Although this kind of pipe has been promoted to a certain extent, its impact resistance at low temperature (-10°C) is still poor

Method used

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  • Impact-resistant modified polyvinyl chloride tube material and preparation process thereof
  • Impact-resistant modified polyvinyl chloride tube material and preparation process thereof
  • Impact-resistant modified polyvinyl chloride tube material and preparation process thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with embodiment:

[0026] The invention proposes an impact-modified polyvinyl chloride pipe and its preparation process. The materials used include: polyvinyl chloride resin, stabilizer, toughening agent, rigid particles, processing aids, external lubricant, and internal lubricant , antioxidants, colorants, fillers.

[0027] The PVC resin is SG-5 type resin, and the requirements of various performance indexes are: apparent density: ≥0.4g / ml; viscosity number: 107-118ml / g; volatile content: ≤0.5%.

[0028] The thermal stabilizer refers to an additive that can improve the thermal stability of PVC, and its function is to prevent or inhibit the release of hydrogen chloride during the production process of the pipe, and at the same time maintain sufficient thermal stability during the use of the product to prolong the service life.

[0029] The antioxidant is a hindered phenolic substance, and its function...

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Abstract

The invention discloses an impact-resistant modified polyvinyl chloride tube material, which is prepared from the following components in part by weight: 100 parts of polyvinyl chloride resin, 0.4 to 4.0 parts of stabilizing agent, 2 to 8 parts of toughening agent, 2 to 8 parts of rigid particles, 0.5 to 3.0 parts of processing aid, 1.1 to 2.5 parts of lubricant, 0.05 to 0.5 part of antioxidant, 0.03 to 3 parts of coloring agent and 0 to 5 parts of filling agent. A preparation process for the tube material comprises the following steps: mixing the components uniformly in a high-speed mixer, extruding the mixture to form the tube material by using a double-host single-screw extruder after the components are mixed uniformly in a cooling mixer, and modularizing, vacuuming and cooling-moldingthe tube material; and cutting and packing the tube material with fixed length. The impact-resistant modified polyvinyl chloride tube material uses a method of cooperative toughening of the toughening agent and the rigid particles, and solves the problem that the impact-resistant PVC tube material difficultly realizes rigidity balance so that the toughness of the tube material is obviously improved while the rigidity of the hard PVC tube material is kept.

Description

technical field [0001] The invention relates to a polyvinyl chloride pipe with excellent low-temperature impact resistance and a preparation process thereof, belonging to the technical field of polyvinyl chloride (PVC) water supply pipes. Background technique [0002] In the water supply system, plastic pipes have the characteristics of non-corrosion, good hygienic performance, and easy installation. They have been vigorously promoted in our country, and it is the general trend to replace traditional galvanized iron pipes. Plastic water supply pipes mainly include: PVC, polyethylene (PE), polypropylene (PP), etc. Compared with other polyolefin pipes, PVC pipes have high strength, good flame retardancy, high ring stiffness, and excellent weather resistance Performance, low price and other advantages, have been widely used. [0003] It is a recognized fact that PVC pipes have poor toughness at low temperatures, mainly manifested in: brittle failures are prone to occur during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L23/28C08L51/00C08L23/06C08L33/20C08L25/12C08K13/02C08K3/26F16L9/12
Inventor 滕谋勇刘建龙侯典军孙刚瑞董克刚
Owner 山东华信塑胶股份有限公司
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