PPR pipe material resistant to low-temperature cracking, preparation method thereof and PPR pipe product prepared from PPR pipe material
A low-temperature-resistant, high-quality product technology, which is applied in the processing field of PPR pipes, can solve the problems of low-temperature shock contribution, failure to meet the anti-cracking requirements of low-temperature environments, and cracking of PPR pipes, so as to improve brittleness, enhance crystal structure stability, Effect of reducing intermolecular tension
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Embodiment 1~5
[0051] Embodiments 1-5 provide a PPR pipe material, the contents of each component are shown in Table 1, and the preparation method follows the following steps:
[0052] Mix PPR, PPB, LLDPE, color masterbatch, and β-nucleating agent evenly to obtain a low-temperature cracking-resistant PPR pipe material.
[0053] The component content (weight part) of table 1 embodiment 1~5PPR pipe material
[0054] 1 2 3 4 5 PPR 100 100 100 100 100 PPB 10 15 20 10 10 β nucleating agent 0.05 0.05 0.05 0.1 0.05 LLDPE 5 5 5 5 3 Masterbatch 5 5 5 5 5
Embodiment 6~10
[0056] Examples 6-10 are PPR pipes prepared by using the pipe materials of Examples 1-5 respectively, and the preparation method follows the following steps:
[0057] S1. Extrude the low-temperature cracking-resistant PPR pipe material through a single-screw extruder to obtain a billet, and then cool and shape it to obtain a PPR pipe product to be processed;
[0058] Among them, the front section of the single-screw extruder adopts hole-type extrusion, and the total length of the die mouth of the single-screw extruder and the straight shaping section of the mandrel is 80mm;
[0059] The barrel temperature for extrusion molding is 180-210°C, the confluence core temperature is 160-180°C, and the mold temperature is 180-210°C;
[0060]Cooling and shaping is vacuum cooling, the vacuum degree during cooling is -0.02~-0.06MPa, and the cooling temperature is 15~23°C;
[0061] S2. The PPR pipe product to be treated obtained in step S1 is cured at 20° C. for 24 hours to obtain a PPR p...
Embodiment 11~12
[0063] Examples 11-12 are all PPR pipes prepared by using the pipe material of Example 1. The difference between the preparation method and Example 6 is:
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