Special material for high-toughness and high-water pressure resistance polypropylene randon copolymer (PPR) pipe material and preparation process thereof

Abstract

The invention relates to a special material for a high-toughness and high-water pressure resistance polypropylene randon copolymer (PPR) pipe material and a preparation process of the special material. The special material is prepared from the following raw materials in percentage by mass: 85-90% of PPR, 10-15% of PPB-240, 0.1-0.3% of a beta-nucleating agent, 0.1-0.3% of an antioxidant and 0.3-0.5% of a lubricant. The preparation process mainly comprises the steps of weighing proper amounts of PPR, PPB, a beta-nucleating agent, an antioxidant and a lubricant according to the prescription, and mixing the materials in a low-speed mixer according to an order from higher proportion to lower proportion; setting a corresponding thread combination; setting heating temperature of various sections of charging barrels of a dual-screw extruder; adding mixed raw and auxiliary materials to a storage hopper of the dual-screw extruder set; starting a lubricating oil pump, a cooling fan, a grain cutting machine, cooling water, a main motor and a feeding motor, and regulating rotating speeds of the main motor and the feeding motor; drawing the extruded materials to the grain cutting machine through a cooling water bath and a blow drying machine, regulating rotating speed of the grain cutting machine, so that the cut materials are 3 in granularity and 3mm long; and detecting various physical indicators of the produced materials in real time.

Description

technical field [0001] The invention relates to the field of plastic modified materials, and specifically discloses a special material for random copolymerized polypropylene (PPR) pipes with high toughness and high water pressure resistance and a preparation process thereof. Background technique [0002] At present, the market for PPR pipes is quite large, but there are two obvious shortcomings of PPR pipe materials: one is that the low-temperature toughness of PPR pipes is poor, and it is easy to crack or break when it is stressed during handling or construction; the other is the heat and water pressure resistance of PPR pipes. Poor, as the water temperature in the pipe rises, the high temperature pressure bearing capacity of the pipe decreases significantly. Contents of the invention [0003] The main purpose of the present invention is to address the two obvious shortcomings of the above-mentioned existing PPR pipes: one is that the low-temperature toughness of the PPR ...

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Problems solved by technology

[0003] The main purpose of the present invention is to address the two obvious shortcomings of the above-mentioned existing PPR pipes: one is that the low-temperature toughness of the PPR pipe is poor, and it is easily cracked or broken when it is stressed during handling or construction; Poor, with the rise of the water temperature in the pipe, the high-temperature pressure-bearing capacity of the pipe is significantly reduced. To provide a high-performance, high-toughness, high-water-pressure-resistant random copolymer polypropylene (PPR) pipe special material and its preparation process

[0004] In view of the shortcomings of existing PPR pipes, we choose to add efficient β-nucleating agent and PPR material for blending modification. β-nucleating agent is an economical and efficient polypropylene β-crystal nucleating agent. Obtain β-crystalline polypropylene with high β-crystalline content, and endow the product with good impact resistance, heat deformation resistance and high porosity, so that the impact resistance and heat deformation resistance of polypropylene, which is a pair of contradictory two organic unity

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