PE drain pipe and production process thereof

Abstract

The invention belongs to the technical field of plastic products. The invention discloses a PE drain pipe and a production process thereof. The PE drain pipe is prepared from, by weight, 80-100 partsof PE, 3-5 parts of nano MgO, 0-5 parts of nano MnS, 5-15 parts of ground calcium carbonate, 2-5 parts of a coupling agent, 0-3 parts of EVA, 3-5 parts of a flame retardant, 3-10 parts of a tougheningagent, 1-5 parts of a heat stabilizer and 0-2 parts of a processing aid. Beneficial effects of the PE drain pipe and the process are that the nano MgO can enhance the heat-conducting property of a PEproduct and avoid the cold welding phenomenon in a PE pipe welding process; the nano MnS can keep the stability of a polyethylene molecular chain in the welding process, and thermal oxidation of polyethylene when the welding temperature is too high is avoided; the ground calcium carbonate, the nano MgO and the nano MnS have a synergistic effect, so that the stability of a welding part can be improved, and the firmness of the welding part is improved; by adding the nano MgO, the nano MnS and the ground calcium carbonate, the temperature range of the PE pipe during welding can be widened, and the welding stability of the PE pipe is improved.

Description

technical field [0001] The invention belongs to the technical field of plastic products, and in particular relates to a PE drainage pipe and a production process thereof. Background technique [0002] PE drainage pipe is polyethylene pipe. Compared with PVC pipe, PE pipe is light in weight, easy to transport and install, and PE material is only composed of carbon and hydrogen molecules. PVC material also contains chlorine atoms that are harmful to the environment. PE waste The treatment will not produce harmful substances, is safe and environmentally friendly, and is widely used in the municipal field. [0003] PE pipes are reliable in connection and convenient in construction. The tensile and blasting strength of welded joints are higher than those of the base metal. The pipes can be constructed by non-excavation technology, which is convenient and fast. Compared with metal pipes, the construction cost can be reduced by more than 30%, and has been gradually replaced. Metal...

AI Technical Summary

Problems solved by technology

However, PE pipes have high requirements for controlling the welding temperature during the welding process. Insufficient heat input during the welding process will cause cold welding. Most cold welding defects are no different from normal joints in appearance. The inner surface of the sleeve and the outer surface of the pipe have been Fused together, there is no gap in the middle, severe cold welding still maintains the state before welding

Cold welded joints cannot be distinguished from the appearance, and are not damaged immediately during the pressure test test before the pipeline trial run. They are often put into use as normal joints. After a certain period of service, the joints will suddenly fail and be damaged; When the resistance wire is too long or improperly assembled, the temperature of the resistance wire is too high during the welding process, and the polyethylene around it will be broken and cracked due to overheating, resulting in a polymer with a relatively low molecular weight, resulting in discontinuity in the welding fusion zone area, which reduces the performance of the material, and the joint is prone to failure after welding

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