CN210397963U - Flame-retardant fiber-reinforced random copolymerization polypropylene composite pipe - Google Patents
Flame-retardant fiber-reinforced random copolymerization polypropylene composite pipe Download PDFInfo
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- CN210397963U CN210397963U CN201920474824.0U CN201920474824U CN210397963U CN 210397963 U CN210397963 U CN 210397963U CN 201920474824 U CN201920474824 U CN 201920474824U CN 210397963 U CN210397963 U CN 210397963U
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Abstract
The utility model relates to a flame-retardant fiber reinforced random copolymerization polypropylene composite pipe, which is characterized by comprising an outer layer, a middle layer and an inner layer, wherein the middle layer is arranged between the outer layer and the inner layer; the outer layer is made of random copolymerization polypropylene containing flame-retardant master batches, the middle layer is made of silicon dioxide fiber reinforced random copolymerization polypropylene, and the inner layer is made of random copolymerization polypropylene containing antibacterial master batches. The flame-retardant random copolymerization polypropylene layer resin adopts the random copolymerization polypropylene added with the flame retardant, so that the flame retardant property of the pipe is improved; the sanitary performance of the pipeline is improved by adding the antibacterial master batch. The application can be used for cold and hot water pipeline systems in buildings, main vertical pipes in buildings, air-conditioning pipeline systems and other industrial pipes.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of the tubular product technique and specifically relates to a compound pipe of fire-retardant type fibre reinforcing random copolymerization polypropylene.
[ background of the invention ]
Since plastic pipelines replaced cast iron pipes and PVC water supply pipes in 1999, PP-R pipes rapidly occupy the whole indoor water supply pipeline market and become mainstream products in the market. Incomplete statistics shows that the PP-R ratio in the whole indoor water supply pipeline market is up to more than 80%.
But at the same time, some problems are also exposed. The oxygen index (LOI) of the PP-R is only 17-18 percent and is less than 21 percent, and the PP-R can be continuously combusted after being away from a fire and belongs to a flammable high polymer material. The PP-R pipe is easy to burn, releases a large amount of heat during burning, has high flame propagation speed and is accompanied with the phenomena of fuming and dripping, easily causes a large-area fire and poses great threat to the safety of life and property of people.
Compared with the similar materials which are not subjected to flame retardant treatment, the polymer subjected to flame retardant treatment is difficult to burn, the flame propagation speed is obviously reduced, the formation and the spread of fire are prevented, and the use safety of products is improved. The flame-retardant PP-R pipe is modified to improve the fire safety. Therefore, the research on the flame retardant modification of the PP-R pipe has very important practical significance.
[ Utility model ] content
The utility model aims to overcome the defects of the prior art and provide a flame-retardant fiber reinforced random copolymerization polypropylene composite pipe and a preparation method thereof.
The purpose of the utility model is realized through the following technical scheme:
the flame-retardant fiber-reinforced random copolymer polypropylene composite pipe is characterized by comprising an outer layer, a middle layer and an inner layer, wherein the middle layer is arranged between the outer layer and the inner layer; the outer layer is flame-retardant random copolymer polypropylene, the middle layer is silicon dioxide fiber reinforced random copolymer polypropylene, and the inner layer is random copolymer polypropylene containing antibacterial master batches.
The outer layer of the pipe is made of flame-retardant random copolymerization polypropylene, so that the hot-melt connectivity of the plastic pipeline is ensured. The outer layer is made of flame-retardant particles and random copolymerization polypropylene particles, wherein the mass fraction of the flame-retardant particles in the outer layer is 0.5-4%.
The middle layer of the pipe is a product functional layer, and the addition of the fibers enhances the rigidity of the pipe and improves the pressure resistance of the pipe. The middle layer is made of silicon dioxide fiber reinforced random copolymer polypropylene particles, the mass fraction of the silicon dioxide fibers in the middle layer is 20-28%, and the length of the silicon dioxide fibers is 4-8 mm.
The inner layer of the pipe ensures good sanitary performance when the pipe is used for delivering water, and completely meets the requirements of drinking water materials. The inner layer is made of nano silver ion containing antibacterial polypropylene master batches and random copolymerization polypropylene particles. The mass fraction of the nano silver ion antibacterial polypropylene master batch in the material of the inner layer is 5-15%.
The preparation method of the tube intermediate layer material 'fiber reinforced random copolymerization polypropylene master batch' comprises the following specific steps:
taking the polypropylene random copolymer master batch as a raw material, adding an antioxidant, silicon dioxide chopped glass fibers, a compatilizer and white oil, and stirring by using a stirrer; and then, carrying out melt extrusion by adopting a double-screw granulator, and carrying out grain cutting by using a grain cutting machine to prepare the fiber reinforced random copolymerization polypropylene master batch.
In the fiber reinforced random copolymerization polypropylene master batch, the mass fraction of the fiber is 20-28%, and the length of the fiber is 4-8 mm.
The preparation method of the antibacterial random copolymerization polypropylene master batch as the inner layer material of the pipe comprises the following specific steps:
taking the polypropylene random copolymer master batch as a raw material, adding the nano-silver layered inorganic antibacterial agent, blending the two, melting, granulating, extruding and granulating.
The specific preparation method of the pipe comprises the following steps:
the flame-retardant fiber reinforced polypropylene random copolymer composite pipe is prepared by uniformly stirring flame-retardant particles and polypropylene random copolymer master batches to serve as an outer layer raw material, using the fiber reinforced polypropylene random copolymer master batches as an intermediate layer raw material, using the antibacterial polypropylene random copolymer master batches as an inner layer raw material, performing melt extrusion through three single-screw extruders, controlling the sleeve temperature to be 60 +/-30 ℃, the head temperature to be 200 +/-25 ℃, the die head temperature to be 210 +/-25 ℃, and controlling the screw rotation speeds of the three extruders to control the extrusion amount of three layers of materials, wherein the ratio of the three layers is 1:1: 1.
Compared with the prior art, the utility model has the positive effects that:
the fiber reinforced layer resin adopts β crystal form random copolymerization polypropylene, so that the low-temperature impact resistance and the pressure resistance of the pipe are improved.
Fire-retardant type fibre reinforcing random copolymerization polypropylene three-layer composite pipe's advantage: the pressure resistance of the pipe and the rigidity of the pipe are improved by introducing the silicon dioxide fiber functional layer, and the linear expansion coefficient of the product is greatly reduced; by adjusting the length of the glass fiber, the linear expansion coefficient can be reduced to 1/3-1/4 of polypropylene material on the premise of ensuring high pressure resistance of the pipe. The flame-retardant random copolymerization polypropylene greatly improves the flame-retardant property of the material and improves the fire-retardant grade of the product; and finally, due to the addition of the antibacterial agent, bacteria are not easy to breed in the pipeline when the pipeline is used for conveying drinking water, so that the aims of resisting and inhibiting bacteria are fulfilled, and the sanitary performance is better. The utility model discloses a can be used to cold and hot water pipe-line system in the building, building owner riser system, air conditioner pipe-line system and other industrial pipes.
[ description of the drawings ]
Fig. 1 is a schematic structural view of embodiment 1 of the present application;
the labels in the figures are: 1 inner layer, 2 middle layer, 3 outer layer.
[ detailed description ] embodiments
The following provides a specific embodiment of the flame-retardant fiber-reinforced random copolymer polypropylene three-layer composite pipe of the present invention.
Example 1
A flame-retardant fiber-reinforced random copolymer polypropylene composite pipe is shown in figure 1 and is characterized by comprising an outer layer, an intermediate layer and an inner layer, wherein the intermediate layer is arranged between the outer layer and the inner layer; the outer layer is flame-retardant random copolymer polypropylene, the middle layer is silicon dioxide fiber reinforced random copolymer polypropylene, and the inner layer is random copolymer polypropylene containing antibacterial master batches.
(1) The outer layer material of the pipe is flame-retardant particles and random copolymerization polypropylene particles, wherein the mass fraction of the flame-retardant particles in the outer layer material is 1.5-2%.
(2) The middle layer of the pipe is made of silicon dioxide fiber reinforced random copolymer polypropylene particles, the mass fraction of the silicon dioxide fibers in the middle layer is 20-28%, and the length of the silicon dioxide fibers is 4-8 mm.
(3) The inner layer of the pipe is made of antibacterial polypropylene master batches containing nano silver ions and random copolymerization polypropylene particles. The mass fraction of the nano silver ion antibacterial polypropylene master batch in the material of the inner layer is 4-16%.
The preparation method of the pipe intermediate layer material 'fiber reinforced random copolymerization polypropylene master batch' comprises the following specific steps:
taking the polypropylene random copolymer master batch as a raw material, adding an antioxidant, silicon dioxide chopped glass fibers, a compatilizer and white oil, and stirring by using a stirrer; and then, carrying out melt extrusion by adopting a double-screw granulator, and carrying out grain cutting by using a grain cutting machine to prepare the fiber reinforced random copolymerization polypropylene master batch.
In the fiber reinforced random copolymerization polypropylene master batch, the mass fraction of the fiber is 20-28%, and the length of the fiber is 4-8 mm.
Secondly, the preparation method of the antibacterial random copolymerization polypropylene master batch as the inner layer material of the pipe comprises the following specific steps:
taking the polypropylene random copolymer master batch as a raw material, adding the nano-silver layered inorganic antibacterial agent, blending the two, melting, granulating, extruding and granulating.
Thirdly, the specific preparation method of the pipe comprises the following steps:
uniformly stirring and mixing the flame-retardant particles and the polypropylene random copolymer master batches to obtain an outer layer raw material, taking the fiber-reinforced polypropylene random copolymer master batches as a middle layer raw material, taking the antibacterial polypropylene random copolymer master batches as an inner layer raw material, carrying out melt extrusion by three single-screw extruders, controlling the sleeve temperature to be 60 +/-30 ℃, the head temperature to be 200 +/-25 ℃, the die head temperature to be 210 +/-25 ℃, and controlling the screw rotation speeds of the three extruders to control the extrusion amount of the three layers of materials so that the ratio of the three layers is 1:1:1, thereby preparing the flame-retardant fiber-reinforced polypropylene random copolymer composite tube.
And (3) performance testing:
the composite pipe described in example 1 should meet a series of performance requirements of CJ/T258-2014 composite pipe of fiber reinforced random copolymer polypropylene for pipes. Wherein the axial linear expansion coefficient of the composite pipe product is less than or equal to 0.05 mm/m.
The combustion performance grade of the composite pipe reaches B of national standard GB 8624 plus 2012' building material and product combustion performance grading2A stage; and the fire-proof grade of the composite pipe reaches grade D of European Union standard EN 13501-1:2009 Classification of building products and member combustion performance.
The antibacterial performance of the inner layer of the composite tube is that the antibacterial performance to escherichia coli is more than 99%, and the antibacterial performance to staphylococcus aureus is more than 99%.
Example 2
A flame-retardant fiber-reinforced random copolymer polypropylene composite pipe is shown in figure 1 and is characterized by comprising an outer layer, an intermediate layer and an inner layer, wherein the intermediate layer is arranged between the outer layer and the inner layer. The outer layer is made of flame-retardant random copolymer polypropylene, the middle layer is made of silicon dioxide fiber reinforced random copolymer polypropylene, the inner layer is made of random copolymer polypropylene, and the thickness ratio of the outer layer to the middle layer to the inner layer is 1:1: 1.
(1) The outer layer material of the pipe is flame-retardant particles and random copolymerization polypropylene particles, wherein the mass fraction of the flame-retardant particles in the outer layer material is 1.5-2%.
(2) The middle layer of the pipe is made of silicon dioxide fiber reinforced random copolymer polypropylene particles, the mass fraction of the silicon dioxide fibers in the middle layer is 20-28%, and the length of the silicon dioxide fibers is 4-8 mm. The master batch of random copolymer polypropylene reinforced with silica fiber was prepared in the same manner as in example 1.
(3) The inner layer of the pipe is made of polypropylene random copolymer particles.
The preparation method of the pipe comprises the following steps:
uniformly stirring and mixing the flame-retardant particles and the polypropylene random copolymer master batches to obtain an outer layer raw material, taking the fiber-reinforced polypropylene random copolymer master batches as an intermediate layer raw material, taking the polypropylene random copolymer master batches as an inner layer raw material, carrying out melt extrusion by three single-screw extruders, controlling the sleeve temperature to be 60 +/-30 ℃, the head temperature to be 200 +/-25 ℃, the die head temperature to be 210 +/-25 ℃, and controlling the screw rotation speeds of the three extruders to control the extrusion amount of the three layers of materials so that the ratio of the three layers is 1:1:1, thereby preparing the flame-retardant fiber-reinforced polypropylene random copolymer composite pipe.
In example 2, compared with example 1, the inner layer of the pipe is not added with an antibacterial agent, and has no functions of sterilization and bacteriostasis.
And (3) performance testing:
the composite pipe described in example 2 should meet a series of performance requirements of CJ/T258-2014 composite pipe of fiber reinforced random copolymer polypropylene for pipes. Wherein the axial linear expansion coefficient of the composite pipe product is less than or equal to 0.05 mm/m.
The combustion performance grade of the composite pipe reaches B of national standard GB 8624 plus 2012' building material and product combustion performance grading2A stage; and the fire-proof grade of the composite pipe reaches grade D of European Union standard EN 13501-1:2009 Classification of building products and member combustion performance.
Example 3
A flame-retardant random copolymer polypropylene composite pipe is shown in figure 1 and is characterized by comprising an outer layer, an intermediate layer and an inner layer. The outer layer is flame-retardant random copolymer polypropylene, the middle layer is random copolymer polypropylene, the inner layer is antibacterial random copolymer polypropylene, and the thickness ratio of the outer layer to the middle layer to the inner layer is 1:1: 1.
(1) The outer layer material of the pipe is flame-retardant particles and random copolymerization polypropylene particles, wherein the mass fraction of the flame-retardant particles in the outer layer material is 1.5-2%.
(2) The material of the middle layer of the pipe is random copolymerization polypropylene particles.
(3) The inner layer of the pipe is made of antibacterial polypropylene master batches containing nano silver ions and random copolymerization polypropylene particles. The mass fraction of the nano silver ion antibacterial polypropylene master batch in the material of the inner layer is 4-16%. The preparation of the master batch of antibacterial random copolymer polypropylene was the same as in example 1.
The preparation method of the pipe comprises the following steps:
uniformly stirring and mixing the flame-retardant particles and the polypropylene random copolymer master batch to obtain an outer layer raw material, taking the polypropylene random copolymer master batch as a middle layer raw material, taking the antibacterial polypropylene random copolymer master batch as an inner layer raw material, performing melt extrusion by three single-screw extruders, controlling the sleeve temperature to be 60 +/-30 ℃, the head temperature to be 200 +/-25 ℃, the die head temperature to be 210 +/-25 ℃, and controlling the screw rotation speeds of the three extruders to control the extrusion amount of the three layers of materials so that the ratio of the three layers is 1:1:1, thereby preparing the flame-retardant polypropylene random copolymer composite tube.
In example 3, compared with example 1, the pipe material has no silica fiber reinforced middle layer, and the axial linear expansion coefficient of the pipe material is increased, but the production cost of the product is reduced.
And (3) performance testing:
the composite pipe described in example 3 should meet a series of performance requirements of GB/T18742.2-2017 polypropylene pipe system part 2 pipe for cold and hot water on the pipe.
The combustion performance grade of the composite pipe reaches B of national standard GB 8624 plus 2012' building material and product combustion performance grading2A stage; and the fire-proof grade of the composite pipe reaches grade D of European Union standard EN 13501-1:2009 Classification of building products and member combustion performance.
The antibacterial performance of the inner layer of the composite tube is that the antibacterial performance to escherichia coli is more than 99%, and the antibacterial performance to staphylococcus aureus is more than 99%.
Example 4
The application also provides a flame-retardant double-layer random copolymerization polypropylene composite pipe which is divided into an outer layer and an inner layer, wherein the outer layer is made of flame-retardant random copolymerization polypropylene, and the inner layer is made of random copolymerization polypropylene. The ratio of the thickness of the outer layer to the thickness of the inner layer is 1: 2.
(1) The outer layer material of the pipe is flame-retardant particles and random copolymerization polypropylene particles, wherein the mass fraction of the flame-retardant particles in the outer layer material is 1.5-2%.
(2) The tubing has no intermediate layer.
(3) The inner layer of the pipe is made of polypropylene random copolymer particles.
The preparation method of the pipe comprises the following steps:
uniformly stirring and mixing the flame-retardant particles and the polypropylene random copolymer master batches to obtain an outer layer raw material, using the polypropylene random copolymer master batches as an inner layer raw material, carrying out melt extrusion by two single-screw extruders, controlling the sleeve temperature to be 60 +/-30 ℃, the head temperature to be 200 +/-25 ℃, the die head temperature to be 210 +/-25 ℃, controlling the screw rotation speed of the two extruders to control the extrusion amount of the two layers of materials, and enabling the ratio of the outer layer to the inner layer to be 1:2 to prepare the flame-retardant polypropylene random copolymer composite pipe.
Compared with the embodiment 1, the pipe material in the embodiment 4 is divided into an outer layer and an inner layer without an intermediate layer; the inner layer of the pipe is not added with an antibacterial agent. The manufacturing process of the product is simplified, and the manufacturing cost is reduced.
And (3) performance testing:
the composite pipe described in example 4 should meet a series of performance requirements of GB/T18742.2-2017 polypropylene pipe system part 2 pipe for cold and hot water on the pipe.
The combustion performance grade of the composite pipe reaches B of national standard GB 8624 plus 2012' building material and product combustion performance grading2A stage; and the fire-proof grade of the composite pipe reaches grade D of European Union standard EN 13501-1:2009 Classification of building products and member combustion performance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as within the protection scope of the present invention.
Claims (2)
1. The flame-retardant fiber-reinforced random copolymer polypropylene composite pipe is characterized by comprising an outer layer, a middle layer and an inner layer, wherein the middle layer is arranged between the outer layer and the inner layer;
the outer layer is flame-retardant random copolymer polypropylene;
the middle layer is silicon dioxide fiber reinforced random copolymer polypropylene;
the length of the silicon dioxide fiber is 4-8 mm;
the inner layer is random copolymerization polypropylene containing antibacterial master batch.
2. The flame retardant fiber reinforced random copolymer polypropylene composite tube according to claim 1, wherein the material ratio of the outer layer, the intermediate layer and the inner layer is 1:1: 1.
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| CN201920474824.0U CN210397963U (en) | 2019-04-10 | 2019-04-10 | Flame-retardant fiber-reinforced random copolymerization polypropylene composite pipe |
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| CN201920474824.0U CN210397963U (en) | 2019-04-10 | 2019-04-10 | Flame-retardant fiber-reinforced random copolymerization polypropylene composite pipe |
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