Cleaning machine pipe resistant to high temperature, low temperature and high pressure

Abstract

The invention discloses a high / low-temperature / high-pressure-resistant cleaning machine pipe, which is prepared from the following components in parts by mass: 100 parts of PVC (Polyvinyl Chloride) 4000, 45 to 55 parts of plasticizer DOTP (Dioctyl Terephthalate), 18 to 22 parts of plasticizer DOS (Dioctyl Olefin Styrene), 1.8 to 2.2 parts of calcium-zinc stabilizer, 90 to 110 parts of TPU (Thermoplastic Polyurethane), 45 to 55 parts of EVA (Ethylene Vinyl Acetate), 9 to 11 parts of compatilizer and 0.18 to 0.22 part of lubricant. The method has the advantage of improving high temperature resistance and cold resistance.

Description

TECHNICAL FIELD

[0001] The application relates to a high-temperature-resistant and low-temperature-resistant high-pressure cleaning machine pipe. BACKGROUND

[0002] Polyethylene pressure pipes are increasingly widely applied in gas delivery, water supply, mineral pipes and other fields due to the characteristics of outstanding chemical corrosion resistance, low-temperature resistance, welding performance, no pollution to the delivered medium, pressure resistance, slow crack growth resistance and long service life.

[0003] A Chinese patent with the publication number CN114193877A discloses a preparation method of a composite high-pressure water pipe, which comprises the following steps: step one, PVC material is put into an extruder for segmented heating and extrusion to obtain an inner pipe; step two, one end of the inner pipe is blocked, and the other end is inflated, and after being placed for 24 hours, an inner pipe A is obtained; step three, the inner pipe A is put into a steel wire braiding machine to braze a steel wire mesh pipe; an inner pipe B is obtained; step four, after the inner pipe B is coated with an outer pipe, an A pipe is obtained; step five, the A pipe is put into a center wrapping machine to perform wrapping treatment on the outer pipe; a wrapped pipe is obtained; and step six, the wrapped pipe is put into a vulcanizing machine to perform vulcanization, the vulcanization time is 60-85 min, the vulcanization temperature is 130-148 DEG C, after the vulcanization is completed, the wrapping is unwound, and a finished product is obtained.

[0004] The prior art has the following disadvantages: the PVC cleaning machine hose on the market is of a structure in which an inner pipe, an outer pipe and a fiber reinforcing mesh sleeve sandwiched between the inner pipe and the outer pipe. However, the inner pipe of the existing high-pressure hose for a cleaning machine has low structural strength and poor high-temperature resistance and cold resistance, which greatly affects the practical service life of the high-pressure hose for the cleaning machine. SUMMARY

[0005] The application aims to provide a high-temperature-resistant and low-temperature-resistant high-pressure cleaning machine pipe which has the advantages of improved high-temperature resistance and cold resistance.

[0006] The above technical objective of the application is achieved by the following technical scheme: A high-temperature-resistant and low-temperature-resistant high-pressure cleaning machine pipe comprises the following components in parts by mass: 100 parts of PVC-4000, 45-55 parts of plasticizer DOTP, 18-22 parts of plasticizer DOS, 1.8-2.2 parts of calcium-zinc stabilizer, 90-110 parts of TPU, 45-55 parts of EVA, 9-11 parts of compatibilizer and 0.18-0.22 parts of lubricant.

[0007] Further, the compatibilizer is maleic anhydride grafted compatibilizer, and the lubricant is polyethylene wax.

[0008] Further, the high and low temperature resistant high pressure cleaning machine pipe further comprises 9-11 parts by mass of silicon dioxide, 2.8-3.2 parts by mass of light calcium carbonate, 4.5-5.5 parts by mass of calcium silicate and 0.03-0.05 parts by mass of zinc stearate.

[0009] Further, the high and low temperature resistant high pressure cleaning machine pipe further comprises 9-11 parts by mass of silicon dioxide, 2.8-3.2 parts by mass of light calcium carbonate, 4.5-5.5 parts by mass of calcium silicate and 0.03-0.05 parts by mass of zinc stearate.

[0010] Further, the high and low temperature resistant high pressure cleaning machine pipe further comprises 4.5-5.5 parts by mass of maleic anhydride.

[0011] Further, the high and low temperature resistant high pressure cleaning machine pipe further comprises 9-11 parts by mass of silicon dioxide, 2.8-3.2 parts by mass of light calcium carbonate, 4.5-5.5 parts by mass of calcium silicate and 0.03-0.05 parts by mass of zinc stearate.

[0012] Further, the high and low temperature resistant high pressure cleaning machine pipe is obtained by the following preparation method: (1) the components of each raw material are weighed according to the formula proportion; (2) the formula amount of PVC-4000 and calcium zinc stabilizer is added to the high-speed mixer and mixed, and when the temperature is raised to 65-85℃, the other components are added and mixed, and the temperature is raised to 100-110℃ and stirred to form a uniform mixture; (3) the mixture is sent into the extruder to drive the mixture through the mold by the screw to obtain the product; Along the advancing direction of the mixture, the forming mold temperature of the extruder is 140-145℃, 145-150℃, 150-155℃, 160-165℃ and 165-170℃ in turn.

[0013] The technical effects of the present application mainly reflect in the following aspects: The technical scheme is adopted, TPU and EVA are added to PVC, the toughness, mechanical strength and high-temperature aging resistance are improved, the PVC is convenient to bend, and the PVC is suitable for high-temperature and high-pressure cleaning machine pipeline; the high-temperature resistance and alkali resistance of the hose are improved by combining silica, light calcium carbonate, calcium silicate and zinc stearate in the application, so that the service life is increased; the salt resistance and alkali resistance of the hose are further improved by combining maleic anhydride and epoxy soybean oil in the application, so that the use range is expanded and the service life is improved; DETAILED DESCRIPTION

[0014] Unless otherwise specified, the raw material source information in the detailed description of the present application is as follows: PVC-4000 is selected from the PVC with a polymerization degree of 4000 produced by Beijing No. 2 Chemical Co., Ltd., and the model is HP-4000; Plasticizer DOTP, dioctyl terephthalate, purchased from Sigma-Aldrich; Plasticizer DOS, dioctyl sebacate, purchased from Sigma-Aldrich; Calcium-zinc stabilizer selected from the calcium-zinc stabilizer of Singapore San Yi SUN ACE; TPU selected from the TPU WHT-1180 extrusion general-purpose grade of Wanhua Chemical; EVA selected from the EVA 18J3 of Yanshan Petrochemical; Maleic anhydride grafting compatibilizer purchased from Dongguan Dinghai Plastic Chemical Co., Ltd., model DH-002; Polyethylene wax selected from Honeywell A-C 316A; Silicon dioxide purchased from Lingshou County Zhengxu Mineral Product Processing Factory, selected from 600 (national standard) by the precipitation method.

[0015] Epoxy soybean oil, purchased from Jinan Xinyuanxi Chemical Co., Ltd. ESO.

[0016] Examples 1-3: A high-temperature and high-pressure cleaning machine pipe resistant to high and low temperatures, obtained by the following preparation method: (1) The raw materials of each component are weighed according to the formula proportion; (2) The formula amount of PVC-4000 and calcium-zinc stabilizer is added to the high-speed mixer and mixed, and when the temperature is raised to 80℃, the formula amount of other components is added and mixed, and the temperature is raised to 108℃ and stirred for 5 min to form a uniform mixture; (3) The mixture is sent into the extruder to drive the mixture through the mold by the screw to form the product; The forming mold temperature of the extruder is 140℃, 145℃, 150℃, 160℃ and 165℃ in turn along the advancing direction of the mixture; the formula information of examples 1-3 is shown in table 1.

[0017] Table 1 Formulation information of Examples 1-3 (unit: mass fraction) Example 1 Example 2 Example 3 PVC-4000 100 100 100 Plasticizer DOTP 50 50 50 Plasticizer DOS 20 20 20 Calcium zinc stabilizer 2 2 2 TPU 100 100 100 EVA 50 50 50 Maleic anhydride grafted compatibilizer 10 10 10 Polyethylene wax 0.2 0.2 0.2 Silicon dioxide 0 10 10 Light calcium carbonate 0 3 3 calcium silicate 0 5 5 Zinc stearate 0 0.04 0.04 Maleic anhydride 0 0 5 Epoxidized soybean oil 0 0 3 Example 4: Preparation of a comparative sample Comparative sample 1: a PVC pipe, which is different from Example 1 in that no TPU and EVA are added.

[0018] Comparative sample 2A: a PVC pipe, which is different from Example 1 in that 10 parts by mass of silica and 0.04 parts by mass of zinc stearate are added.

[0019] Comparative sample 2B: a PVC pipe, which is different from Example 1 in that 3 parts by mass of light calcium carbonate and 0.04 parts by mass of zinc stearate are added.

[0020] Performance test (1) Sample preparation: the mixed sample was respectively plasticized and pressed into a sheet using an open mill, the plasticizing temperature was 180°C and the plasticizing time was 5 min, the sample thickness was about 1.0 mm, then the sheet was taken out and cooled for standby. The dumbbell sheet type 5 was selected for mechanical test.

[0021] (2) Liquid resistance performance test The liquid resistance performance test was carried out according to CJ / T 491-2016, the sample was soaked in the solvent for 21 days, then taken out and naturally volatilized at 25°C for 24 hr, and the results are shown in Table 2.

[0022] Table 2 Performance test As can be seen from Table 2, compared with Comparative Sample 1, the mass change rate and tensile strength change rate of Examples 1-3 in the test solvent are lower, and Examples 1-3 have good solvent resistance and high temperature resistance. The solvent resistance of Examples 1-3 is in the order of Example 3 > Example 2 > Example 1.

[0023] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A high-temperature and high-pressure cleaning machine pipe, characterized in that: The invention comprises the following components in parts by mass: 100 parts of PVC-4000, 45 to 55 parts of plasticizer DOTP, 18 to 22 parts of plasticizer DOS, 1.8 to 2.2 parts of calcium zinc stabilizer, 90 to 110 parts of TPU, 45 to 55 parts of EVA, 9 to 11 parts of compatibilizer and 0.18 to 0.22 parts of lubricant.

2. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 1, characterized in that: The compatibilizer is a maleic anhydride grafted compatibilizer, and the lubricant is polyethylene wax.

3. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 1, characterized in that: Calculated by mass, the high and low temperature resistant high pressure cleaning machine pipe also includes 9 to 11 parts of silicon dioxide, 2.8 to 3.2 parts of light calcium carbonate, 4.5 to 5.5 parts of calcium silicate and 0.03 to 0.05 parts of zinc stearate.

4. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 3, characterized in that: The invention comprises the following components in parts by mass: 100 parts of PVC-4000, 50 parts of plasticizer DOTP, 20 parts of plasticizer DOS, 2 parts of calcium zinc stabilizer, 100 parts of TPU, 50 parts of EVA, 10 parts of maleic anhydride grafted compatibilizer, 0.2 parts of polyethylene wax, 9 to 11 parts of silicon dioxide, 2.8 to 3.2 parts of light calcium carbonate, 4.5 to 5.5 parts of calcium silicate and 0.03 to 0.05 parts of zinc stearate.

5. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 3, characterized in that: The high and low temperature resistant high pressure cleaning machine pipe further comprises 4.5 to 5.5 parts of maleic anhydride by mass.

6. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 5, characterized in that: Its characteristics are: The invention comprises the following components in parts by mass: 100 parts of PVC-4000, 50 parts of plasticizer DOTP, 20 parts of plasticizer DOS, 2 parts of calcium zinc stabilizer, 100 parts of TPU, 50 parts of EVA, 10 parts of maleic anhydride grafted compatibilizer, 0.2 parts of polyethylene wax, 10 parts of silicon dioxide, 3 parts of light calcium carbonate, 5 parts of calcium silicate, 0.04 parts of zinc stearate, 5 parts of maleic anhydride and 3 parts of epoxidized soybean oil.

7. The high-low temperature resistant high-pressure cleaning machine pipe according to claim 1, characterized in that: The high and low temperature resistant high pressure cleaning machine pipe is obtained by the following preparation method: (1) Weigh the raw materials of each component according to the formula ratio; (2) Add the formulated amount of PVC-4000 and calcium zinc stabilizer into a high-speed mixer and mix. When the temperature is raised to 65-85°C, add the formulated amount of other components and mix. Then, heat the mixture to 100-110°C and stir to form a uniform mixture. (3) feeding the mixed material into an extruder and driving the mixed material through a mold to obtain a product by a screw; Along the mixing direction, the molding die temperature of the extruder is 140-145℃, 145-150℃, 150-155℃, 160~165℃ and 165~170℃.

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