Antibacterial chlorine-removing ppr composite pipe

Abstract

This invention belongs to the field of pipe technology, and particularly relates to an antibacterial and chlorine-removing PPR composite pipe. Addressing the problem of how to further control residual chlorine in water within a safe range in existing technologies, this invention provides an antibacterial and chlorine-removing PPR composite pipe, comprising an outer layer, a first reinforcing layer, a toughening layer, a second reinforcing layer, and an antibacterial and chlorine-removing layer. The antibacterial and chlorine-removing layer includes a main material and a bactericidal and chlorine-removing composite additive. The inner surface of this invention is provided with an antibacterial and chlorine-removing layer containing a bactericidal and chlorine-removing composite additive with copper-zinc alloy as its core component. This effectively controls the residual chlorine content in the water at the user end, preventing harm to human health caused by unreasonable increases in residual chlorine due to malfunctions or other reasons.

Description

Technical Field

[0001] This invention belongs to the field of pipe technology, and particularly relates to an antibacterial and chlorine-removing PPR composite pipe. Background Technology

[0002] Most domestic water treatment plants producing drinking water primarily employ the traditional process of coagulation sedimentation – filtration – chlorination disinfection. Currently, it is difficult to completely purify the large amount of dissolved organic matter in source water. Furthermore, residual chlorine in the treated water oxidizes the organic matter in the pipe network, producing harmful disinfection byproducts such as trihalomethanes. Residual chlorine in water is extremely harmful to human health, linked to various diseases such as colon and rectal cancer, breast cancer, stomach cancer, heart disease, arteriosclerosis, anemia, hypertension, and adverse allergic reactions. Therefore, controlling residual chlorine in water within safe limits is a pressing issue that needs to be addressed.

[0003] For example, a Chinese invention patent application discloses a toughened and antibacterial polypropylene pressure pipe [application number: 201510998360.X]. This invention consists of an outer toughening layer and an inner antibacterial layer, wherein the toughening layer is the outer layer of the pipe and the antibacterial layer is the inner layer of the pipe. The toughening layer formula is formulated with the following percentages: 80%–90% random copolymer polypropylene pipe-specific material, 2%–4% color masterbatch, 0.5‰–2‰ polypropylene-specific β-nucleating agent, 5%–10% compatibilizer, and 0.5‰–1‰ heat stabilizer. The above two formulas are extruded and granulated in a twin-screw extruder. The granulated raw material is then co-extruded, cooled, drawn, and cut in a single-screw extruder to obtain the finished product.

[0004] This invention application has the advantages of superior impact resistance and hydrostatic resistance of the outer layer of the pipe, and the inner layer is an antibacterial layer, which ensures that the transported medium will not be contaminated by the pipe itself, and at the same time has the advantages of antibacterial and bacteriostatic properties, but it still does not solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an antibacterial and chlorine-removing composite pipe with good chlorine removal effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] An antibacterial and chlorine-removing PPR composite pipe comprises, from the outside to the inside, an outer layer, a first reinforcing layer, a toughening layer, a second reinforcing layer, and an antibacterial and chlorine-removing layer, wherein the antibacterial and chlorine-removing layer comprises a main material and a bactericidal and chlorine-removing composite additive.

[0008] The main material includes polypropylene.

[0009] The bactericidal and chlorine-removing composite additive includes black silicon material and copper-zinc alloy.

[0010] The copper-zinc alloy is a granular material with a mesh size of less than 110.

[0011] The antibacterial and dechlorination layer comprises 80-100 parts by weight of polypropylene, 5-15 parts by weight of copper-zinc alloy, and 1-2 parts by weight of black silicon material.

[0012] The antibacterial and dechlorination layer comprises 90 parts by weight of polypropylene, 8.5 parts by weight of copper-zinc alloy, and 1.5 parts by weight of black silicon material.

[0013] In the above-mentioned antibacterial and dechlorination PPR composite pipe, the reinforcing layer is prepared by the following method:

[0014] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300μm and the fiber addition ratio is 15-25%. The fiber includes one of glass fiber, basalt fiber, and carbon fiber. The blending additives include compatibilizer and toughening agent, with addition ratios of 4-8% and 2-5%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer (POE).

[0015] In the aforementioned antibacterial and chlorine-removing PPR composite pipe, the toughening layer comprises 80-100 parts by weight of polypropylene, 5-10 parts by weight of toughening resin, 0.1-1 parts by weight of β-crystal nucleating agent, and 0.5-1 parts by weight of nano-silica.

[0016] In the aforementioned antibacterial and dechlorination PPR composite pipe, the toughening resin is one or a mixture of HIPP and POE.

[0017] In the aforementioned antibacterial and dechlorination PPR composite pipe, the outer layer is made of PP-R resin.

[0018] Compared with existing technologies, the advantages of this invention are:

[0019] 1. The inner surface of this invention is provided with an antibacterial and dechlorination layer. The antibacterial and dechlorination layer contains a bactericidal and dechlorination composite additive with copper-zinc alloy as the core component. This effectively controls the residual chlorine content in the water at the user end, and avoids harm to the human body when the residual chlorine in the water rises unreasonably due to malfunctions or other reasons.

[0020] 2. This invention uses black silicon material as one of the sterilization components. A small amount of black silicon material can achieve a good sterilization effect, saving production costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] In the diagram: outer layer 1, first reinforcing layer 2, toughening layer 3, second reinforcing layer 4, antibacterial and chlorine-removing layer 5. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] This embodiment provides an antibacterial and chlorine-removing PPR composite pipe, such as Figure 1 As shown, from the outside to the inside, it includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0026] The antibacterial and dechlorination layer 5 comprises 83 parts by weight of polypropylene, 15 parts by weight of copper-zinc alloy, and 2 parts by weight of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0027] The potential of Zn is -0.76V, and that of Cu is +0.34V. In an electrolyte solution, the copper and zinc on the alloy surface form countless tiny electrodes, constituting a micro-battery. In the galvanic cell reaction, impurities undergo a chlorination reduction reaction. When the copper-zinc alloy comes into contact with residual chlorine in water, chlorine undergoes a series of redox reactions as shown in equations (1-1) and (1-2). Zinc is oxidized to Zn²⁺, and residual chlorine is reduced to Cl⁻. Furthermore, zinc ions effectively inhibit the growth of organic matter and microorganisms in water, significantly enhancing the bactericidal effect when combined with black silicon materials.

[0028] Zn + Cl2 = Zn 2+ + 2Cl - (1-1)

[0029] Zn + 2H + + ClO - = Zn 2+ + Cl - + H2O (1-2)

[0030] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0031] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm and the fiber addition ratio is 15%. The fiber is carbon fiber. The blending additives include compatibilizer and toughening agent, with addition ratios of 4% and 2%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer (POE).

[0032] The toughening layer 3 comprises 88 parts by weight of polypropylene, 10 parts by weight of toughening resin, 1 part by weight of β-crystal nucleating agent, and 1 part by weight of nano-silica. The toughening resin is HIPP resin.

[0033] The outer layer 1 is made of PP-R resin.

[0034] Example 2

[0035] This embodiment provides an antibacterial and chlorine-removing PPR composite pipe, such as Figure 1 As shown, from the outside to the inside, it includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0036] The antibacterial and dechlorination layer 5 comprises 94 parts by weight of polypropylene, 5 parts by weight of copper-zinc alloy and 1 part by weight of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0037] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0038] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300μm, the fiber addition ratio is 25%, the fiber is basalt fiber, and the blending additives include compatibilizer and toughening agent, with addition ratios of 8% and 5%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0039] The toughening layer 3 comprises 94.4 parts by weight of polypropylene, 5 parts by weight of toughening resin, 0.1 parts by weight of β-crystal nucleating agent, and 0.5 parts by weight of nano-silica. The toughening resin is POE resin.

[0040] The outer layer 1 is made of PP-R resin.

[0041] Example 3

[0042] This embodiment provides an antibacterial and chlorine-removing PPR composite pipe, such as Figure 1 As shown, from the outside to the inside, it includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0043] The antibacterial and dechlorination layer 5 comprises 88.5 parts by weight of polypropylene, 10 parts by weight of copper-zinc alloy, and 1.5 parts by weight of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0044] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0045] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0046] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0047] The outer layer 1 is made of PP-R resin.

[0048] Comparative Example 1

[0049] This comparative example provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0050] Among them, the antibacterial and dechlorination layer 5 is made of polypropylene.

[0051] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0052] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0053] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0054] The outer layer 1 is made of PP-R resin.

[0055] Comparative Example 2

[0056] This comparative example provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0057] The antibacterial and dechlorination layer 5 comprises 90 parts by weight of polypropylene and 10 parts by weight of copper-zinc alloy. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0058] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0059] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0060] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0061] The outer layer 1 is made of PP-R resin.

[0062] Comparative Example 3

[0063] This comparative example provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4, and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0064] The antibacterial and dechlorination layer 5 comprises 99 parts by weight of polypropylene and 1 part by weight of black silicon material.

[0065] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0066] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0067] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0068] The outer layer 1 is made of PP-R resin.

[0069] Comparative Example 4

[0070] This embodiment provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4 and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0071] The antibacterial and dechlorination layer 5 comprises 97.5 parts by weight of polypropylene, 1 part of copper-zinc alloy, and 1.5 parts of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0072] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0073] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0074] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0075] The outer layer 1 is made of PP-R resin.

[0076] Comparative Example 5

[0077] This embodiment provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4 and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0078] The antibacterial and dechlorination layer 5 comprises 95.5 parts by weight of polypropylene, 3 parts by weight of copper-zinc alloy, and 1.5 parts by weight of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0079] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0080] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0081] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0082] The outer layer 1 is made of PP-R resin.

[0083] Comparative Example 6

[0084] This embodiment provides an antibacterial and dechlorination PPR composite pipe, which includes an outer layer 1, a first reinforcing layer 2, a toughening layer 3, a second reinforcing layer 4 and an antibacterial and dechlorination layer 5 from the outside to the inside. The inner antibacterial and dechlorination layer 5 encloses and forms a hollow pipe, through which water flows.

[0085] The antibacterial and dechlorination layer 5 comprises 89.5 parts by weight of polypropylene, 10 parts by weight of copper-zinc alloy, and 0.5 parts by weight of black silicon material. The copper-zinc alloy is purchased KDF55 and is granular material with a particle size of less than 110 mesh.

[0086] The first reinforcing layer 2 and the second reinforcing layer 4 are prepared by the following method:

[0087] Polypropylene material, fiber, and blending additives are prepared by twin-screw extrusion. The fiber length is 100-300 μm, the fiber addition ratio is 20%, the fiber is glass fiber, and the blending additives include compatibilizer and toughening agent, the addition ratios are 6% and 4%, respectively. The toughening agent is silane-grafted crosslinked polypropylene copolymer POE.

[0088] The toughening layer 3 comprises 91 parts by weight of polypropylene, 8 parts by weight of toughening resin, 0.2 parts by weight of β-crystal nucleating agent, and 0.8 parts by weight of nano-silica. The toughening resin is POE resin.

[0089] The outer layer 1 is made of PP-R resin.

[0090] Application Example 1

[0091] Pipe 1 was prepared using the components described in Example 3;

[0092] Pipe 2 was prepared using the components described in Comparative Example 1;

[0093] Pipe 3 was prepared using the components described in Comparative Example 2;

[0094] Pipe 4 was prepared using the components described in Comparative Example 3;

[0095] Pipe 5 was prepared using the components described in Comparative Example 4;

[0096] Pipe 6 was prepared using the components described in Comparative Example 5;

[0097] Pipe 7 was prepared using the components described in Comparative Example 6;

[0098] Tap water was used to prepare an Enterobacterium concentration of 500 cfu / ml. Water circulation systems 1-8 were established using pipes 1-8, storage containers, and a water pump. All pipes used in water circulation systems 1-8 had the same length and cross-sectional size. Equal volumes of the initial Enterobacterium concentration of 500 cfu / ml aqueous solution were added to water circulation systems 1-8, and the systems were circulated at a flow rate of 100 L / h. After 8 hours, the total number of Enterobacteriaceae in each water circulation system was measured. The results are shown in Table 1 below.

[0099] Table 1

[0100] Test object Enterobacterial concentration (cfu / ml) Water cycle system 1 25 Water circulation system 2 1089 Water circulation system 3 258 Water cycle system 4 139 Water cycle system 5 203 Water circulation system 6 175 Water circulation system 7 80

[0101] Results Analysis: Comparing the above experimental results, it can be found that the combination of black silicon material and copper-zinc alloy can achieve a good bactericidal effect, thus achieving the expected purpose of this invention.

[0102] After the experiment, the water circulation systems 1-8 were cleaned, disinfected, and dried. Eight equal volumes of 0.3 ml / L chlorinated tap water were divided and added to each of the water circulation systems 1-8. The systems were circulated at a flow rate of 100 L / d. After 10 days, the chlorine content in each water circulation system was measured. The results are shown in Table 2 below.

[0103] Table 2

[0104] Test object Chlorine content (mg / L) before the experiment Chlorine content (mg / L) after the experiment Water cycle system 1 0.3 0.02 Water circulation system 2 0.3 0.3 Water circulation system 3 0.3 0.06 Water cycle system 4 0.3 0.3 Water cycle system 5 0.3 0.21 Water circulation system 6 0.3 0.15 Water circulation system 7 0.3 0.05

[0105] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0106] Although this paper uses terms such as outer layer 1, first reinforcing layer 2, toughening layer 3, second reinforcing layer 4, and antibacterial and chlorine-removing layer 5 frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An antibacterial chlorine-free PPR composite pipe, characterized by: From outside to inside, it includes outer layer (1), first reinforcing layer (2), toughening layer (3), second reinforcing layer (4) and antibacterial chlorine removal layer (5) in turn, the antibacterial chlorine removal layer (5) includes main material and bactericidal chlorine removal composite additive; The antibacterial chlorine removal layer (5) includes 80-100 parts by mass of polypropylene, 5-15 parts of copper-zinc alloy and 1-2 parts of black silicon material. The outer layer (1) is made of PP-R resin.

2. The antibacterial chlorine-free PPR composite pipe according to claim 1, characterized in that: The main material includes polypropylene.

3. The antibacterial chlorine-free PPR composite pipe according to claim 1, wherein: The bactericidal chlorine removal composite additive includes copper-zinc alloy and black silicon material.

4. The antibacterial chlorine-free PPR composite pipe according to claim 3, characterized in that: The copper-zinc alloy is a particle material below 110 mesh.

5. The antibacterial chlorine-free PPR composite pipe according to claim 1, wherein: The antibacterial chlorine removal layer (5) includes 90 parts by mass of polypropylene, 8.5 parts of copper-zinc alloy and 1.5 parts of black silicon material.

6. The antibacterial chlorine-free PPR composite pipe according to claim 1, wherein: The reinforcing layer (2, 4) is prepared by the following method: The polypropylene material, fiber and blending aid are prepared by double screw extrusion, the fiber length is 100-300 μm, the fiber addition ratio is 15-25%, the fiber includes one of glass fiber, basalt fiber and carbon fiber, the blending aid includes compatibility agent and toughening agent, the addition ratio is 4-8% and 2-5% respectively, the toughening agent is silane grafted crosslinked polypropylene copolymer POE.

7. The antibacterial chlorine-free PPR composite pipe according to claim 1, wherein: The toughening layer (3) includes 80-100 parts by mass of polypropylene, 5-10 parts of toughening resin, 0.1-1 parts of β crystal nucleating agent and 0.5-1 parts of nano silicon dioxide.

8. The antibacterial chlorine-free PPR composite pipe according to claim 7, characterized in that: The toughening resin is one or mixture of HIPP and POE.

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