Pipe as well as preparation method and purpose of pipe
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A pipe material and formula technology, applied in the pipeline field, can solve the problems of poor antibacterial performance, high temperature resistance, and pressure resistance of pipelines, and achieve low cost, optimized pressure bearing capacity and high temperature resistance, and improved creep resistance.
Inactive Publication Date: 2012-10-10
杭州恒标管业有限公司
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[0008] The invention proposes a pipe and its preparation method and application, which solves the technical problems of the pipe in the prior art, such as poor high temperature resistance, poor pressure resistance, and poor antibacterial performance.
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Embodiment 1
[0045] A water pipe pipe material, which is composed of an outer layer, a middle layer and an inner layer, and their formulations are shown in Table 1 respectively.
[0046] Table 1
[0047]
[0048]
[0049] The preparation method of above-mentioned pipe material is as follows:
[0050] (1) use 3 stirrers to stir the formula of uniform outer layer, middle layer, inner layer respectively;
[0051](II) Add the above-mentioned uniformly stirred materials into a mold with a three-layer structure (ie, outer, middle, and inner), and strictly control the temperature, mold temperature 1, 190°C; mold 2, 195°C; mold 3, 198°C; mold 4, 200°C; mold 5, 200°C; the screw temperature is as follows, screw 1, 202°C; screw 2, 205°C; screw 3, 202°C; screw 4, 198°C; screw 5, 180°C; The pipe is soaked in 40-45°C constant temperature water first, then enters the vacuum box, then enters the 85°C constant temperature box 1, and then cools at 25-30°C, after traction, enters the 70°C constant te...
Embodiment 2
[0053] A water pipe material, which is composed of an outer layer, a middle layer and an inner layer, and their formulations are shown in Table 2 respectively.
[0054] Table 2
[0055]
[0056]
[0057] For the preparation method, refer to Example 1. The difference from Example 1 is that the temperature of thermostat 1 is 105°C, and that of thermostat 2 is 75°C.
Embodiment 3
[0059] A water pipe material, which consists of an outer layer, a middle layer and an inner layer, and their formulations are shown in Table 3 respectively.
[0060] table 3
[0061]
[0062] For the preparation method, refer to Example 1. The difference from Example 1 is that the temperature of thermostat one is 95°C, and that of thermostat two is 80°C.
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Abstract
The invention provides a pipe as well as a preparation method and a purpose of the pipe. The pipe consists of an outer layer, a middle layer and an inner layer and has the recipe that the outer layer comprises PPR (polypropylene randon coplymer) polypropylene, PP-B (polypropylene block copolymer pipe) polypropylene and beta-nucleating agents, the middle layer comprises PPR polypropylene, PP-B polypropylene, beta-nucleating agents and nanometer calcium carbonate, an inner layer comprises PPR polypropylene, PP-B polypropylene, silver ion nanometer antibacterial masterbatch and beta-nucleating agents. The preparation comprises the step that stirring is carried out, stirred materials are added into a mold with a three-layer structure and are extruded under the condition that the mold temperature is 195 to 205 DEG C, and the screw rod temperature is 175 to 210 DEG C, the post treatment is carried out, and the pipe is obtained. The pipe has the advantages that the unique high-intensity crystal structure is realized, the pressure bearing capability and the high temperature resistance capability of a pipeline system are optimized, the creep resistance capability of the pipeline is greatly improved, and the fifty-year long-period hydrostatic stress at 70 DEG C reaches 5.0MPa.
Description
technical field [0001] The invention relates to the technical field of pipes, in particular to a pipe and its preparation method and use. Background technique [0002] The main defects of PPR water pipes are: high temperature resistance and pressure resistance are slightly poor, and the long-term working temperature cannot exceed 70°C; the length of each section is limited, and it cannot be bent for construction. A lot of joints are used; the pipes are cheap but the fittings are relatively expensive. However, in terms of comprehensive performance, PPR pipe is currently the most cost-effective pipe material, so it has become the first choice for home improvement water pipe renovation. [0003] Compared with other kinds of pipes: galvanized iron pipes have been banned by the Ministry of Construction in 2000 due to many shortcomings; aluminum-plastic pipes have good high temperature resistance and are convenient for construction, but when used as hot water pipes, due to long-t...
Claims
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