Barrier polybutylene aluminum-plastic composite pipe with antibacterial layer

Abstract

The utility model relates to a barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer. The technical problem that due to an existing aluminum layer structure, the pressure resistance and rigidity of a pipe body are not ideal is solved. Comprising a composite pipe body of a hollow structure, the composite pipe body is of a five-layer structure, the composite pipe body comprises an inner layer, a secondary inner layer, a middle layer, a secondary outer layer and an outer layer which are arranged from inside to outside, the inner layer is an antibacterial polybutylene layer, the secondary inner layer is a first glue layer, the middle layer is an aluminum layer formed by winding an aluminum strip, the secondary outer layer is a second glue layer, and the outer layer is a polybutylene layer. And the thickness ratio of the polybutylene layer to the antibacterial polybutylene layer is 3: 1. The device has the advantages that the aluminum layer is obtained in an aluminum strip winding mode, meanwhile, the pressure resistance and rigidity of the composite pipe body are further improved through the spiral overlapping portion of the aluminum layer, the linear expansion coefficient is greatly reduced, and the oxygen barrier property of the composite pipe body is improved due to the fact that the compact oxide layer is arranged on the surface of the aluminum layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipes, and in particular relates to a barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer. Background Art

[0002] Since polybutylene pipes do not have barrier properties, oxygen can penetrate the pipes into the water, thus corroding the metal parts in the pipe system. Therefore, products that use EVOH layers to make polybutylene pipes with oxygen barrier properties have also appeared on the market. However, the addition of the EVOH barrier layer does not significantly improve the pressure-bearing capacity of the pipes, and since polybutylene materials are flexible, they cannot meet some application scenarios that require pipe rigidity.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a β-crystal aluminum-plastic composite polybutylene pipe and its manufacturing method [201310426652.7]. The β-crystal aluminum-plastic composite polybutylene pipe includes a 5-layer co-extrusion structure, which is a PB layer, a hot melt adhesive layer, an aluminum layer, a hot melt adhesive layer, and a PB layer from the outside to the inside.

[0004] The above solution solves the problem of poor pressure bearing capacity of existing pipes to a certain extent, but the solution still has many shortcomings, such as the aluminum layer structure leading to unsatisfactory pressure resistance and rigidity of the pipe body. Summary of the invention

[0005] The utility model aims to solve the above problems and provides a barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, comprising a composite pipe body with a hollow structure, the composite pipe body is a five-layer structure, the composite pipe body comprises an inner layer, a sub-inner layer, an intermediate layer, a sub-outer layer and an outer layer arranged from the inside to the outside, the inner layer is an antibacterial polybutylene layer, the sub-inner layer is a first glue layer, the intermediate layer is an aluminum layer wound by an aluminum strip, the sub-outer layer is a second glue layer, the outer layer is a polybutylene layer, and the thickness ratio of the polybutylene layer to the antibacterial polybutylene layer is 3:1. The intermediate layer adopts an aluminum layer to obtain better pressure bearing performance and sample assembly performance, and the dense oxide layer on the aluminum surface is used to prevent oxygen from entering, thereby improving the safety of the composite pipe body. The inner layer adopts an antibacterial polybutylene layer to improve the hygienic performance of the composite pipe body. The composite pipe body can be used in hot and cold water pipe systems, HVAC and air conditioning pipe systems in buildings.

[0007] In the above-mentioned barrier polybutene aluminum-plastic composite pipe with an antibacterial layer, the inner layer is a nano-silver antibacterial polybutene layer. The polybutene masterbatch is used as a raw material, and a nano-silver layered inorganic antibacterial agent is added, and the two are evenly blended, and then extruded and granulated after melting to obtain the raw material for the antibacterial polybutene layer. The antibacterial polybutene layer fully meets the requirements of drinking water materials, and the mass fraction of the nano-silver layered inorganic antibacterial agent in the material of the inner layer is 5%-10%.

[0008] In the above-mentioned barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, the thickness of the inner layer accounts for 15%-20% of the total wall thickness of the composite pipe body.

[0009] In the above-mentioned barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, the thickness of the outer layer accounts for 45%-60% of the total wall thickness of the composite pipe body.

[0010] In the above-mentioned barrier polybutylene aluminum-plastic composite tube with an antibacterial layer, the intermediate layer is located between the sub-inner layer and the sub-outer layer, the sub-inner layer and the sub-outer layer are made of the same material, and the thickness of the sub-inner layer and the sub-outer layer is equal. The sub-inner layer and the sub-outer layer are for the surface compatibility of the inner layer, the intermediate layer and the outer layer to improve the firmness.

[0011] In the above-mentioned barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, the sub-inner layer and the sub-outer layer are both made of hot-melt adhesive material, which is compatible with the surfaces of polymer materials and metal materials.

[0012] In the above-mentioned barrier polybutylene aluminum-plastic composite tube with an antibacterial layer, the thickness of the sub-inner layer and the thickness of the sub-outer layer are both 0.05-0.1 mm.

[0013] In the above-mentioned barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, the aluminum layer is a spiral structure formed by winding an aluminum strip in an oblique left-hand or right-hand winding manner and having a plurality of spiral sections, and the winding angle of the aluminum strip is 40-80 degrees. The composite pipe body can be bent and shaped more easily and has good flexibility.

[0014] In the above-mentioned barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, the sides of the aluminum strips in two adjacent spiral sections of the aluminum layer are overlapped to form a spiral overlapping portion in the aluminum layer, and the spiral overlapping portion extends from one end of the aluminum layer to the other end. The spiral overlapping portion can further improve the pressure resistance of the composite pipe body.

[0015] In the above-mentioned barrier polybutylene aluminum-plastic composite tube with an antibacterial layer, the thickness of the area of ​​the aluminum layer without the spiral superposition part is 0.5 mm, and the thickness of the spiral superposition part is 1 mm.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The device obtains the aluminum layer by winding an aluminum strip. At the same time, the spirally superimposed portion of the aluminum layer further improves the pressure resistance and rigidity of the composite pipe body, and the linear expansion coefficient is greatly reduced. Since there is a dense oxide layer on the surface of the aluminum layer, the oxygen barrier property of the composite pipe body is improved.

[0018] 2. The device adopts an antibacterial polybutylene layer, so that when the composite pipe body is transporting drinking water, it is not easy for bacteria to grow inside the pipe, thereby achieving the purpose of antibacterial and antibacterial, and having better hygienic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural explosion diagram of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the middle layer in the utility model.

[0022] In the figure: composite tube body 1, inner layer 2, antibacterial polybutylene layer 21, sub-inner layer 3, middle layer 4, aluminum layer 41, aluminum tape 42, spiral superposition part 43, sub-outer layer 5, outer layer 6, polybutylene layer 61. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1-3 As shown, a barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer includes a composite pipe body 1 with a hollow structure. The composite pipe body 1 is a five-layer structure. The composite pipe body 1 includes an inner layer 2, a sub-inner layer 3, an intermediate layer 4, a sub-outer layer 5 and an outer layer 6 arranged from the inside to the outside. The inner layer 2 is an antibacterial polybutylene layer 21, the sub-inner layer 3 is a first glue layer, the intermediate layer 4 is an aluminum layer 41 wound by an aluminum strip 42, the sub-outer layer 5 is a second glue layer, and the outer layer 6 is a polybutylene layer 61, and the thickness ratio of the polybutylene layer 61 to the antibacterial polybutylene layer 21 is 3:1. The intermediate layer 4 uses an aluminum layer 41 to obtain better pressure bearing performance and sample performance, and the dense oxide layer on the aluminum surface is used to prevent oxygen from entering, thereby improving the safety of the composite pipe body 1. The inner layer 2 uses an antibacterial polybutylene layer 21 to improve the hygienic performance of the composite pipe body 1. The composite pipe body 1 can be used in hot and cold water pipe systems, HVAC and air conditioning pipe systems in buildings.

[0025] Combination Figure 1 and Figure 2As shown, the inner layer 2 is a nano-silver antibacterial polybutene layer. The polybutene masterbatch is used as a raw material, and a nano-silver layered inorganic antibacterial agent is added. The two are evenly blended, and then extruded and granulated after melting to obtain the raw material used for the antibacterial polybutene layer 21. The antibacterial polybutene layer 21 fully meets the requirements of drinking water materials. The mass fraction of the nano-silver layered inorganic antibacterial agent in the material of the inner layer 1 is 5%-10%.

[0026] The thickness of the inner layer 2 accounts for 15%-20% of the total wall thickness of the composite pipe body 1 .

[0027] Specifically, the thickness of the outer layer 6 accounts for 45%-60% of the total wall thickness of the composite pipe body 1 .

[0028] Furthermore, the middle layer 4 is located between the sub-inner layer 3 and the sub-outer layer 5, the sub-inner layer 3 and the sub-outer layer 5 are made of the same material, and the thickness of the sub-inner layer 3 and the sub-outer layer 5 is equal. The sub-inner layer 3 and the sub-outer layer 5 are for the surface compatibility of the inner layer 2, the middle layer 4 and the outer layer 6 to improve firmness.

[0029] Furthermore, the sub-inner layer 3 and the sub-outer layer 5 are both made of hot melt adhesive material, which is compatible with the surfaces of polymer materials and metal materials.

[0030] Meanwhile, the thickness of the sub-inner layer 3 and the thickness of the sub-outer layer 5 are both 0.05-0.1 mm.

[0031] like Figure 3 As shown, the aluminum layer 41 is a spiral structure formed by winding an aluminum strip 42 in an oblique left-hand or right-hand winding manner and having a plurality of spiral sections, and the winding angle of the aluminum strip 42 is 40-80 degrees, which can make the composite pipe body 1 easier to bend and shape, and has good flexibility.

[0032] The sides of the aluminum strips 42 in two adjacent spiral sections of the aluminum layer 41 are stacked to form a spiral stacking portion 43 in the aluminum layer 41, and the spiral stacking portion 43 extends from one end to the other end of the aluminum layer 41. The spiral stacking portion 43 can further improve the compression resistance of the composite pipe body 1.

[0033] Specifically, the thickness of the region of the aluminum layer 41 not having the spirally superimposed portion 43 is 0.5 mm, and the thickness of the spirally superimposed portion 43 is 1 mm.

[0034] The principle of this embodiment is:

[0035] The polybutene masterbatch and the nano-silver layered inorganic antibacterial agent are blended and extruded into granules to form the inner layer 2, and the sub-inner layer 3 is a glue layer. The double-layer co-extrusion is performed by two single-screw extruders of the first group. The obtained double-layer tube is obliquely wound with an aluminum tape 42 to obtain an aluminum layer 42. At the same time, the inner layer 2 is tightly attached to the inner side of the aluminum layer 42 through the sub-inner layer 3. After the three-layer structure is pulled into the second group of extruders, the sub-outer layer 5 and the outer layer 6 are double-extruded by two single-screw extruders of the second group. The sub-outer layer 5 is a glue layer, and the outer layer 6 is firmly attached to the outer side of the aluminum layer 42 through the sub-outer layer 5. The two groups of extruders are controlled to control the extrusion amount of the polymer material, so that the ratio of the inner layer 2 to the outer layer 6 is 1:3, and then the composite tube body 1 with an antibacterial layer is obtained after spray cooling.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Although the terms such as composite pipe body 1, inner layer 2, antibacterial polybutylene layer 21, sub-inner layer 3, middle layer 4, aluminum layer 41, aluminum belt 42, spiral superposition part 43, sub-outer layer 5, outer layer 6, polybutylene layer 61 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional limitation is contrary to the spirit of the utility model.

Claims

1. A barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer, comprising a composite pipe body (1) with a hollow structure, wherein the composite pipe body (1) is a five-layer structure, characterized in that: The composite pipe body (1) comprises an inner layer (2), a sub-inner layer (3), an intermediate layer (4), a sub-outer layer (5) and an outer layer (6) arranged from the inside to the outside, wherein the inner layer (2) is an antibacterial polybutylene layer (21), the sub-inner layer (3) is a first glue layer, the intermediate layer (4) is an aluminum layer (41) formed by winding an aluminum strip (42), the sub-outer layer (5) is a second glue layer, and the outer layer (6) is a polybutylene layer (61), and the thickness ratio of the polybutylene layer (61) to the antibacterial polybutylene layer (21) is 3:

1.

2. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The inner layer (2) is a nano-silver antibacterial polybutene layer.

3. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The thickness of the inner layer (2) accounts for 15%-20% of the total wall thickness of the composite pipe body (1).

4. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The thickness of the outer layer (6) accounts for 45%-60% of the total wall thickness of the composite pipe body (1).

5. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The middle layer (4) is located between the sub-inner layer (3) and the sub-outer layer (5); the sub-inner layer (3) and the sub-outer layer (5) are made of the same material, and the sub-inner layer (3) and the sub-outer layer (5) have the same thickness.

6. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The sub-inner layer (3) and the sub-outer layer (5) are both made of hot-melt adhesive material.

7. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 6, characterized in that: The thickness of the sub-inner layer (3) and the thickness of the sub-outer layer (5) are both 0.05-0.1 mm.

8. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The aluminum layer (41) is a spiral structure formed by winding an aluminum strip (42) in an oblique left-hand or oblique right-hand winding manner and having a plurality of spiral sections, and the winding angle of the aluminum strip (42) is 40-80 degrees.

9. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 1, characterized in that: The sides of the aluminum strips (42) in two adjacent spiral sections of the aluminum layer (41) are stacked to form a spiral stacking portion (43) in the aluminum layer (41), and the spiral stacking portion (43) extends from one end of the aluminum layer (41) to the other end.

10. The barrier polybutylene aluminum-plastic composite pipe with an antibacterial layer according to claim 9, characterized in that: The thickness of the region of the aluminum layer (41) not having the spirally superimposed portion (43) is 0.5 mm, and the thickness of the spirally superimposed portion (43) is 1 mm.

Images