Anti-scale antibacterial high-temperature-resistant water supply and drainage pipe

Abstract

The invention provides an anti-scale antibacterial high-temperature-resistant water supply and drainage pipe. The anti-scale antibacterial high-temperature-resistant water supply and drainage pipe comprises the following components: 25-75 parts of PVC resin, 25-75 parts of CPVC resin powder, 2-8 parts of a processing aid, 4-8 parts of an impact modifier, 4-6 parts of a calcium-zinc stabilizer, 0.5-1.5 parts of an internal lubricant G60, 0.6-1.5 parts of an external lubricant, 2-4 parts of a filler, 1-3 parts of titanium dioxide, 0.5-1 part of a coloring agent and 3-5 parts of nano-silver antibacterial particles. By changing the electroplating conditions of the mold core, the mold core reaches the mirror light degree, the problem of surface electroplating roughness of the mold core of the pipe extrusion mold is solved, high glossiness of the inner surface of the pipe in the extrusion process is guaranteed, meanwhile, in the aspect of raw materials of the pipe, the physical performance and flatness of the pipe are improved by adding the impact modifier, and the production cost is reduced. The nano-silver antibacterial particles are added, so that the pipe has an antibacterial function, the CPVC resin powder with the chlorine content larger than or equal to 66% is added, so that the pipe has outstanding mechanical performance and heat resistance, and the Vicat softening point temperature of the pipe is 95 DEG C or above.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic pipe production, and in particular relates to an anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe. Background Art

[0002] With the development of economy, people's rational selection of pipe fittings plays a vital role in ensuring the safe and stable operation of water distribution network. At present, commonly used pipe fittings mainly include plastic pipe fittings, metal pipe fittings and composite pipe fittings. Among them, PVC pipe fittings have excellent flame retardancy, wear resistance, chemical corrosion resistance, mechanical properties, electrical insulation and other advantages, and have been widely used in industry, construction, municipal administration, agriculture and other fields.

[0003] At present, the market has higher requirements for the inner wall of water supply and drainage pipes, and the flatness of the inner wall of the product has also increased accordingly. However, existing pipes often appear uneven, resulting in dirt accumulation after long-term use, causing the water transmission performance of the pipes to be greatly reduced, bringing inconvenience to users.

[0004] In terms of antibacterial properties, most of them rely on the chemical reagent disinfection process in sewage treatment plants, and there are few reports on the use of antibacterial pipes in the drainage field. Summary of the invention

[0005] In view of this, the present invention aims to propose an anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe to solve the problems of PVC pipes in the prior art being easy to scale, poor in high-temperature resistance and lacking antibacterial function.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] The first aspect of the present invention provides an anti-scale, antibacterial and high-temperature resistant water supply and drainage pipe, comprising the following components: 25-75 parts of PVC resin, 25-75 parts of CPVC resin powder, 2-8 parts of processing aid, 4-8 parts of impact modifier, 4-6 parts of calcium zinc stabilizer, 0.5-1.5 parts of internal lubricant G60, 0.6-1.5 parts of external lubricant, 2-4 parts of filler, 1-3 parts of titanium dioxide, 0.5-1 parts of colorant, and 3-5 parts of nano-silver antibacterial particles.

[0008] Furthermore, the external lubricant includes one or more of PE wax and OPE wax.

[0009] Further, the filler includes one or more of calcium powder and talcum powder;

[0010] Furthermore, the colorant includes one or more of a whitening agent, carbon black, and white carbon black.

[0011] Furthermore, the PVC resin is commercially available SG-5, the CPVC resin powder is a resin with a chlorine content of ≥66% and a Vicat softening point of above 112°C.

[0012] Furthermore, the impact modifier is one or more of Mitsubishi Rayon S2035 or Mitsubishi Rayon 2030, Rohm and Haas BTA751, and Kaneka Chemical FM55.

[0013] Furthermore, in order to improve the aging performance, Mitsubishi Rayon S2035 or Mitsubishi Rayon 2030 itself has been weather-resistant treated, which can also give the product good surface properties.

[0014] Further, the processing aid is a processable acrylate;

[0015] Further, the calcium zinc stabilizer comprises 40% hydrotalcite, 20% zeolite, 28% zinc stearate, 10% calcium stearate, 1% fatty acid, and the balance is antioxidant;

[0016] Furthermore, the fatty acid is preferably hexadecanoic acid or octadecanoic acid, and the antioxidant is preferably antioxidant 1076.

[0017] Furthermore, the nano silver antibacterial particles are produced by hydrothermal synthesis, and the content of 20-50 nanometers is above 85%.

[0018] The pipe has a sterilizing effect on Escherichia coli, Staphylococcus aureus and the like due to the antibacterial effect of silver ions.

[0019] The second aspect of the present invention provides a method for preparing the anti-scaling, antibacterial and high-temperature resistant water supply and drainage pipe according to the first aspect of the present invention, comprising the following steps:

[0020] The raw materials are mixed evenly in a high-temperature kneader according to the proportion, added into a twin-screw extruder after cooling, and after extrusion molding, cooled and shaped, and then pulled and cut.

[0021] Furthermore, the twin-screw extruder includes a barrel, a confluence core, a mold, and a die;

[0022] The temperatures of the barrel, confluence core, mold and die are: barrel temperature 155-175℃, confluence core temperature 155-160℃, mold temperature 160-170℃, and die temperature 170-198℃.

[0023] Furthermore, the core of the mold is an electroplated part.

[0024] Furthermore, the electroplating current of the electroplated part is controlled to be 20-30A according to the surface area, the electroplating voltage is 7-9V, and the temperature of the electroplating bath is 50-60°C.

[0025] Preferably, the electroplating condition is that the current is controlled at 20-30A per 1 square decimeter.

[0026] Furthermore, the electroplating current of the electroplated part is 30A and the voltage is 9V in the early stage, the electroplating current is 20A and the voltage is 7V in the middle stage, and the electroplating current is 30A and the voltage is 9V in the final stage.

[0027] Furthermore, the electroplated parts also need to be finely polished to achieve a mirror finish (8k) to solve the problem of surface electroplating roughness of the tube extrusion die core and ensure high gloss on the inner surface of the tube during the extrusion process.

[0028] Compared with the prior art, the anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe described in the present invention has the following advantages:

[0029] (1) The pipe of the present invention is added with CPVC resin powder having a chlorine content of ≥66%, so that the pipe has outstanding mechanical properties and heat resistance, and the Vicat softening point temperature of the pipe is above 95°C.

[0030] (2) The impact modifier of the present invention adopts S2035 / 2030, which has been weather-resistant treated, thereby increasing the weather resistance of the pipe and giving the product good surface properties.

[0031] (3) The tube material of the present invention is added with nano silver antibacterial particles. Due to the antibacterial effect of silver ions, the tube material has a sterilizing effect on Escherichia coli, Staphylococcus aureus, etc.

[0032] (4) The present invention controls the electroplating current, electroplating voltage and electroplating pool temperature of the mold core, and simultaneously finely polishes the surface of the obtained electroplated part to achieve a mirror finish (8k), thereby solving the problem of surface electroplating roughness of the mold core of the pipe extrusion die and ensuring high gloss on the inner surface of the pipe during the extrusion process.

[0033] (5) The pipe material described in the present invention has a hydrophobic contact angle greater than 70 degrees and has certain anti-scaling and self-cleaning effects. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be described in detail below with reference to embodiments.

[0036] Example 1

[0037] An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe material comprises the following components in parts by weight:

[0038] 50 parts of PVC resin, 50 parts of CPVC resin powder, 3 parts of ACR, 2.5 parts of S2030, 1.5 parts of BTA751, 3 parts of FM55, 6 parts of calcium zinc stabilizer, 1 part of G60, 1.2 parts of PE wax, 3 parts of calcium powder, 1 part of titanium dioxide, 0.5 parts of white carbon black, and 3 parts of nano-silver antibacterial particles.

[0039] The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of hexadecanoic acid and 1% of antioxidant 1076.

[0040] Example 2

[0041] An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe material comprises the following components in parts by weight:

[0042] 50 parts of PVC resin, 50 parts of CPVC resin powder, 3 parts of ACR, 3 parts of S2035, 1.5 parts of BTA751, 3 parts of FM55, 6 parts of calcium zinc stabilizer, 1 part of G60, 1.2 parts of PE wax, 3 parts of calcium powder, 1 part of titanium dioxide, 0.5 parts of white carbon black, and 3 parts of nano-silver antibacterial particles.

[0043] The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of hexadecanoic acid and 1% of antioxidant 1076.

[0044] Comparative Example 1

[0045] An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe material comprises the following components in parts by weight:

[0046] 50 parts of PVC resin, 50 parts of CPVC resin powder, 3 parts of ACR, 6 parts of calcium zinc stabilizer, 1 part of G60, 1.2 parts of PE wax, 3 parts of calcium powder, 1 part of titanium dioxide, 0.5 parts of white carbon black, and 3 parts of nano-silver antibacterial particles.

[0047] The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of hexadecanoic acid and 1% of antioxidant 1076.

[0048] Comparative Example 2

[0049] An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe material comprises the following components in parts by weight:

[0050] 50 parts of PVC resin, 50 parts of CPVC resin powder, 3 parts of ACR, 7 parts of BTA751, 6 parts of calcium zinc stabilizer, 1 part of G60, 1.2 parts of PE wax, 3 parts of calcium powder, 1 part of titanium dioxide, 0.5 parts of white carbon black, and 3 parts of nano-silver antibacterial particles.

[0051] The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of hexadecanoic acid and 1% of antioxidant 1076.

[0052] Comparative Example 3

[0053] An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe material comprises the following components in parts by weight:

[0054] 50 parts of PVC resin, 50 parts of CPVC resin powder, 3 parts of ACR, 7 parts of FM55, 6 parts of calcium zinc stabilizer, 1 part of G60, 1.2 parts of PE wax, 3 parts of calcium powder, 1 part of titanium dioxide, 0.5 parts of white carbon black, and 3 parts of nano-silver antibacterial particles.

[0055] The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of hexadecanoic acid and 1% of antioxidant 1076.

[0056] The preparation methods of the anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipes of the above-mentioned Examples 1-2 and Comparative Examples 1-3 are as follows:

[0057] The raw materials are mixed evenly in a high-temperature kneader, added into a twin-screw extruder after cooling, extruded, cooled and shaped, and then pulled and cut.

[0058] The twin-screw extruder includes a barrel, a confluence core, a mold, and a die;

[0059] The temperatures of the barrel, confluence core, mold and die are: barrel temperature 155-175℃, confluence core temperature 155-160℃, mold temperature 160-170℃, and die temperature 170-198℃.

[0060] The core of the mold is electroplated. The current in the early stage of electroplating is 30A and the voltage is 9V. The current in the middle stage of electroplating is 20A and the voltage is 7V. The current in the final stage of electroplating is 30A and the voltage is 9V. The temperature of the electroplating bath is 50-60℃.

[0061] After the electroplating is completed, the surface of the electroplated parts is finely polished.

[0062] The anti-scaling, antibacterial and high-temperature resistant water supply and drainage pipes of Examples 1-2 and Comparative Examples 1-3 were tested for mechanical properties and hydrophobic properties. The glossiness of the pipes was tested using a 60-degree geometric reflection gloss meter. The test results are shown in Table 1.

[0063] Table 1 Test results of anti-scaling, antibacterial and high temperature resistant water supply and drainage pipes of Examples 1-2 and Comparative Examples 1-3

[0064]

[0065] According to the above embodiments and comparative examples and the test results in the above table, Example 1 of the present invention adds S2030 (2.5 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers, Example 2 adds S2035 (3 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers, Comparative Example 1 does not add an impact modifier, Comparative Example 2 adds BTA751 (7 parts) as an impact modifier, and Comparative Example 3 adds FM55 (7 parts) as an impact modifier.

[0066] In terms of mechanical properties, compared with Comparative Example 1 without adding an impact modifier, the elongation at break of Examples 1 and 2 of the present invention is increased from 60% to 118-120%, and the tensile yield strength is increased from 42 MPa to 48-49 MPa; compared with Comparative Example 2 with the addition of the impact modifier BTA751 (7 parts), the elongation at break is increased from 80% to 118-120%, and the tensile yield strength is increased from 46 MPa to 48-49 MPa; compared with Comparative Example 3 with the addition of the impact modifier FM55 (7 parts), the elongation at break is also relatively improved, from 115% to 118-120%. It can be seen that after adding S2030 (2.5 parts), BTA751 (1.5 parts) and FM55 (3 parts) as impact modifiers in Example 1 of the present invention and adding S2035 (3 parts), BTA751 (1.5 parts) and FM55 (3 parts) as impact modifiers in Example 2, the pipe exhibits better mechanical properties than those of Comparative Examples 1-3.

[0067] In terms of thermal stability, the longitudinal shrinkage rate of Examples 1 and 2 of the present invention is 2%, and the longitudinal shrinkage rate of Comparative Examples 1-3 is 3%. Compared with Comparative Examples 1-3, the longitudinal shrinkage rate of Examples 1-2 of the present invention is reduced, which proves that the pipes prepared by adding S2030 (2.5 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers in Examples 1-2 of the present invention, or adding S2035 (3 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers, have better thermal stability.

[0068] In terms of flatness, the contact angle of the pipe was calculated using the ellipse method. The contact angle of the pipe prepared in Examples 1-2 of the present invention was 88 degrees, the contact angle of the pipe prepared in Comparative Example 1 was 55 degrees, the contact angle of the pipe prepared in Comparative Example 2 was 58 degrees, and the contact angle of the pipe prepared in Comparative Example 3 was 60 degrees. Compared with Comparative Examples 1-3, the contact angle of Examples 1-2 of the present invention was significantly increased, proving that the pipes prepared in Examples 1-2 of the present invention by adding S2030 (2.5 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers, or adding S2035 (3 parts), BTA751 (1.5 parts), and FM55 (3 parts) as impact modifiers have higher gloss than the pipes of Comparative Examples 1-3.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe, characterized by: The invention comprises the following ingredients: 25-75 parts of PVC resin, 25-75 parts of CPVC resin powder, 2-8 parts of processing aid, 4-8 parts of impact modifier, 4-6 parts of calcium zinc stabilizer, 0.5-1.5 parts of internal lubricant G60, 0.6-1.5 parts of external lubricant, 2-4 parts of filler, 1-3 parts of titanium dioxide, 0.5-1 parts of colorant and 3-5 parts of nano silver antibacterial particles.

2. The anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe according to claim 1, characterized in that: The impact modifier is one or more of Mitsubishi Rayon S2035 or Mitsubishi Rayon 2030, Rohm and Haas BTA751, and Kaneka Chemical FM55.

3. The anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe according to claim 1, characterized in that: The processing aid is a processable acrylate; The calcium zinc stabilizer comprises 40% of hydrotalcite, 20% of zeolite, 28% of zinc stearate, 10% of calcium stearate, 1% of fatty acid, and the balance is antioxidant; The external lubricant includes one or more of PE wax and OPE wax; The filler includes one or more of calcium powder and talcum powder; The colorant includes one or more of a whitening agent, carbon black, and white carbon black.

4. The anti-scaling, anti-bacterial and high-temperature resistant water supply and drainage pipe according to claim 1, characterized in that: The nano silver antibacterial particles are produced by a hydrothermal synthesis method, and the content of 20-50 nanometer particles is above 85%.

5. A method for preparing a scale-proof, antibacterial and high-temperature resistant water supply and drainage pipe according to any one of claims 1 to 4, characterized in that: The following steps are involved: The raw materials are mixed evenly in a high-temperature kneader according to the proportion, added into a twin-screw extruder after cooling, and after extrusion molding, cooled and shaped, and then pulled and cut.

6. The preparation method according to claim 5, characterized in that: The twin-screw extruder comprises a barrel, a confluence core, a mold, and a die; The temperatures of the barrel, confluence core, mold and die are: barrel temperature 155-175℃, confluence core temperature 155-160℃, mold temperature 160-170℃, and die temperature 170-198℃.

7. The preparation method according to claim 6, characterized in that: The mold core of the mold is an electroplated part.

8. The preparation method according to claim 7, characterized in that: The electroplating current of the electroplated part is controlled to be 20-30A according to the surface area, the electroplating voltage is 7-9V, and the temperature of the electroplating bath is 50-60°C.

9. The preparation method according to claim 7, characterized in that: The electroplating current of the electroplated part is 30A and the voltage is 9V in the early stage, the electroplating current is 20A and the voltage is 7V in the middle stage, and the electroplating current is 30A and the voltage is 9V in the final stage.

10. The preparation method according to claim 7, characterized in that: The electroplated part also needs to be finely polished on the surface.

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