Long fiber reinforced high-pressure aeration hose and manufacturing method thereof

Abstract

The invention relates to the technical field of high-pressure aeration hoses, in particular to a long-fiber-reinforced high-pressure aeration hose and a manufacturing method thereof.The long-fiber-reinforced high-pressure aeration hose comprises a long-fiber-woven outer reinforcing layer and a modified TPEE lining layer, and the modified TPEE lining layer and the long-fiber-woven outer reinforcing layer are overlapped and permeated in the thickness part of the radial section; the modified TPEE lining layer is provided with regularly distributed aeration micropores; wherein the thickness ratio of the overlapped permeation is 50%-60% of the thickness of the modified TPEE lining layer; the composite long fiber woven structure is used as the reinforcing layer, so that the strength of the aeration hose is greatly improved, the pressure bearing capacity of the aeration hose is greatly improved, the aeration efficiency can be improved by increasing pressure under the condition that the sizes of holes are not changed, the aeration hose can be repeatedly wound and recycled, and the hose is not prone to deformation; the aeration hose can be extruded and applied for a long distance by adopting a one-time forming co-extrusion permeation and overturning process, and the strength and the comprehensive performance of the hose body are better.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure aeration hoses, and in particular to a long-fiber reinforced high-pressure aeration hose and a manufacturing method thereof. Background Art

[0002] Aeration hoses are widely used in biochemical treatment projects of industrial wastewater and urban domestic sewage in petrochemical, textile, food, papermaking, printing and dyeing, brewing, pharmaceutical, leather making, etc. When the efficiency of the running aerator is low or it is frequently blocked, the aeration hose can be used for transformation to improve the oxygenation capacity and stirring effect. It is also used for circulating water in aquaculture, high-density breeding systems and ordinary fish ponds. It is also used in sewage regulating tanks to prevent large particles of sediment deposition and remove some organic matter.

[0003] Traditional aeration hoses are made of single-layer TPU polyurethane materials (existing technologies such as CN103663749B, CN201914968U, etc.). This single-layer material has low pressure bearing capacity and low aeration efficiency. After repeated use, the elongation of TPU gradually increases, causing the aeration holes on it to expand, resulting in the failure of the aeration function. Due to the poor hydrolysis resistance and acid-base properties of TPU, it is immersed in the aeration tank for a long time and suffers hydrolysis and ages quickly, reducing its service life. After long-term use, when the holes are covered by microorganisms and scale, the cleaning operation is usually high-pressure cleaning. Once the high-pressure cleaning is performed, the holes on it will expand, which also causes the aeration function to fail. In addition, the length of traditional aeration hoses is about 20 meters to 100 meters. Due to the limited strength of the single-layer polyurethane, it cannot be used for long distances. It is easy to be stretched, damaged and broken during long-distance actual applications. Summary of the invention

[0004] In order to solve the technical problems of easy deformation, low pressure bearing, low strength, low aeration efficiency, low environmental stability and low reliability in long-distance use of the existing traditional aeration hose, a long fiber reinforced high-pressure aeration hose and a manufacturing method thereof are provided. The hose body manufactured by the method of the present invention has enhanced pressure bearing capacity, and the axial and radial strengths are also greatly improved. Without changing the size of the hole, the aeration efficiency can be improved by increasing the pressure; in addition, when it is laid for long distances, there is no need to worry about being stretched and broken, and it can also be used for a long time in chemically corrosive media, and has good environmental stability.

[0005] In order to achieve the above objectives, the present invention is implemented by the following technical solutions: A long fiber reinforced high-pressure aeration hose, comprising a long fiber braided outer reinforcement layer and a modified TPEE inner lining layer, wherein the modified TPEE inner lining layer and the long fiber braided outer reinforcement layer partially overlap and penetrate in thickness in a radial cross section, and the modified TPEE inner lining layer has regularly distributed aeration micropores; The thickness of the overlapping penetration accounts for 50%-60% of the thickness of the modified TPEE liner layer. The thicker the overlapping penetration is, the higher the interlayer peeling strength is. However, the more overlapping penetration parts there are, the thinner the remaining rubber hose (i.e., the liner layer) is, which will reduce the tensile strength accordingly. Therefore, the thickness of the overlapping penetration is preferably in the range of 50%-60%.

[0006] Furthermore, the material of the modified TPEE lining layer is a modified TPEE material, and the modified TPEE material includes the following main materials in parts by weight: 30 parts to 50 parts of thermoplastic polyester elastomer (TPEE), 15 parts to 25 parts of chlorinated polyethylene, and 10 parts to 20 parts of acrylonitrile-butadiene-styrene terpolymer (ABS).

[0007] Furthermore, the modified TPEE material also includes the following auxiliary materials in parts by weight: 2-4 parts of hydrolysis stabilizer, 2-5 parts of antioxidant, 4-6 parts of friction reducer, 0.5-1 part of weathering agent, and 0.2-0.5 parts of heat stabilizer.

[0008] Preferably, the hydrolysis stabilizer is polymeric carbodiimide (model KSJ-936); the antioxidant is antioxidant 1010 (i.e., pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate); the friction reducer is selected from one or more of molybdenum disulfide and graphite, and the particle size is less than 0.5 mm; the weathering agent is light stabilizer 119; and the heat stabilizer is BASF Irganox245.

[0009] Furthermore, the long fiber braided outer reinforcement layer is made of long fibers woven into a cylindrical strip by warp and weft according to design requirements (such as caliber, pressure, etc.), and the long fibers are selected from one or more of polyester fibers, aramid fibers, and continuous carbon fibers.

[0010] Furthermore, the thickness of the modified TPEE lining layer is in the range of 0.7 mm to 2 mm.

[0011] Furthermore, the aeration micropores are distributed in the range of 1500 to 3000 per meter on the long fiber reinforced high-pressure aeration hose; the hole diameter of the aeration micropores is 0.2mm-0.25mm, and the depth of the aeration micropores is the thickness of the modified TPEE lining layer.

[0012] A method for manufacturing a long fiber reinforced high-pressure aeration hose comprises the following steps: S1, using long fibers to weave warp and weft into a cylindrical strip blank according to design requirements, and waiting for use; S2, passing the strip blank on the core of the co-extrusion die, and sucking the dried modified TPEE material into the extruder, the extruder causes the modified TPEE material to form a melt and extrude, and the melt penetrates from the outer surface of the strip blank through the front die of the co-extrusion die, that is, the thickness of the two parts in the radial section overlaps and penetrates, and the co-extrusion penetration extrusion is formed in one time, and then it is cooled and surface laser punched under the action of traction, and then rolled up to obtain a prefabricated hose; S3. The prefabricated hose is turned over on its inner and outer surfaces by using a belt turning device to finally form a long fiber reinforced high-pressure aeration hose, whose structure is: the modified TPEE material is used as a modified TPEE inner lining layer inside, the belt blank is used as a long fiber woven outer reinforcement layer outside, and aeration micropores are regularly distributed on the modified TPEE inner lining layer, and the modified TPEE inner lining layer and the long fiber woven outer reinforcement layer overlap and penetrate.

[0013] Furthermore, the modified TPEE material is processed by the following steps: S21: drying a thermoplastic polyester elastomer, a chlorinated polyethylene, and an acrylonitrile-butadiene-styrene terpolymer respectively, and premixing the chlorinated polyethylene and the acrylonitrile-butadiene-styrene terpolymer to obtain a mixture A; At the same time, premix the hydrolysis stabilizer, the friction reducing agent, the antioxidant and the heat stabilizer to obtain a mixture B; S22: heating and mixing the thermoplastic polyester elastomer and the mixture B, and then adding a weathering agent and mixing to obtain a mixture C; S23: melt-blending the mixture C, adding the mixture A from a side feed port, extruding and granulating to obtain a modified TPEE material.

[0014] Preferably, the temperature of the heating and mixing is 35°C-45°C; the mixing rate of the overall steps S21 and S22 is 300rpm-600rpm, and the mixing time is at least 10min; The melt blending in S23 is carried out in a twin-screw extruder, and the temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160°C, the temperature of zone 2 is 170°C, the temperature of zone 3 is 175°C, the temperature of zone 4 is 180°C, the temperature of zone 5 is 185°C, the temperature of zone 6 is 190°C, the temperature of zone 7 is 195°C, the temperature of zone 8 is 200°C, the temperature of zone 9 is 205°C, and the temperature of the die is 210°C.

[0015] Furthermore, the extrusion temperature of the extruder in S2 for forming a melt of the modified TPEE material is 200°C-210°C.

[0016] Furthermore, the extrusion speed is consistent with the pulling speed.

[0017] Beneficial technical effects: The long fiber reinforced high-pressure aeration hose of the present invention adopts modified TPEE material, which is highly resistant to hydrolysis and acid and alkali, can be used for a long time in a medium with chemical corrosion, has good environmental stability, and has a long service life in the environment of chemical, textile, food, papermaking, printing and dyeing, brewing, pharmaceutical, leather making and other fields. After being reinforced with long fibers, the bonding strength between the fibers and the modified TPEE material is large, which not only enhances the pressure bearing capacity of the pipe body, but also greatly improves the axial and radial strength. When it is laid and applied over a long distance, there is no need to worry about being stretched and broken, and it is safe and reliable to use over a long distance; the composite long fiber braided structure is used as a reinforcement layer, so that the strength of the aeration hose is greatly improved, and the pressure bearing capacity of the aeration hose is greatly improved. Without changing the size of the hole, the aeration efficiency can be improved by increasing the pressure; it can be repeatedly rolled up, recycled and reused, the hose is not easy to deform, and the hole size is consistent and the deformation is small; the present invention adopts a one-time molding co-extrusion and flipping process to enable the aeration hose to be extruded and applied over a long distance, and the strength and comprehensive performance of the pipe body can support the challenges faced by long-distance use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a process flow chart of a method for manufacturing a long fiber reinforced high pressure aeration hose; Figure 2 The figure is a schematic diagram of the axial cross-sectional structure of the prefabricated hose obtained through the first two steps and a schematic diagram of the flipping; Figure 3 This is a schematic diagram of the radial cross-sectional structure of the prefabricated hose obtained through the first two steps. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Unless otherwise specifically stated, the numerical value set forth in these embodiments does not limit the scope of the present invention. The technology and method known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology and method should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values.

[0021] The experimental methods in the following examples without specifying specific conditions are usually measured in accordance with national standards; if there is no corresponding national standard, the method is carried out in accordance with the general standard requirements or general methods.

[0022] The following thermoplastic polyester elastomer is abbreviated as TPEE; chlorinated polyethylene is abbreviated as CPE; acrylonitrile-butadiene-styrene terpolymer is abbreviated as ABS; polyurethane elastomer is abbreviated as TPU.

[0023] Preparation Example 1 This case is to prepare modified TPEE materials, the formula is as follows: Modified TPEE material-Ⅰ includes the following materials by weight: 30 parts of TPEE, 16 parts of CPE, 12 parts of ABS, 2 parts of polymeric carbodiimide KSJ-936, 2 parts of antioxidant 1010, 4 parts of molybdenum disulfide, 0.5 parts of light stabilizer 119, and 0.2 parts of BASF Irganox245; The preparation method of the modified TPEE material of the above formula includes the following steps: S21: drying TPEE, CPE and ABS at 90° C. for 4 h respectively, and premixing the CPE and ABS at 400 rpm for 25 min to obtain a mixture A; At the same time, the hydrolysis stabilizer, the friction reducing agent, the antioxidant and the heat stabilizer were heated and mixed at 40° C. for 25 minutes to obtain a mixture B; S22: heating and mixing the TPEE and the mixture B at 40° C. and 400 rpm for 25 min, then adding a weathering agent and continuing to mix at 40° C. and 500 rpm for 10 min to obtain a mixture C; S23: Add the mixture C into a twin-screw extruder for melt blending, and add the mixture A from the side feeding port. The temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160°C, the temperature of zone 2 is 170°C, the temperature of zone 3 is 175°C, the temperature of zone 4 is 180°C, the temperature of zone 5 is 185°C, the temperature of zone 6 is 190°C, the temperature of zone 7 is 195°C, the temperature of zone 8 is 200°C, the temperature of zone 9 is 205°C, the temperature of the die is 210°C, and the modified TPEE material-Ⅰ is obtained by extrusion and granulation.

[0024] Preparation Example 2 This case is to prepare modified TPEE materials, the formula is as follows: Modified TPEE material-II includes the following materials in parts by weight: 35 parts of TPEE, 20 parts of CPE, 16 parts of ABS, 2.5 parts of polymeric carbodiimide KSJ-936, 2.5 parts of antioxidant 1010, 5 parts of molybdenum disulfide, 0.7 parts of light stabilizer 119, and 0.3 parts of BASF Irganox245; The preparation method of the modified TPEE material of the above formula includes the following steps: S21: drying TPEE, CPE and ABS at 90° C. for 4 h respectively, and premixing the CPE and ABS at 500 rpm for 20 min to obtain a mixture A; At the same time, the hydrolysis stabilizer, the friction reducing agent, the antioxidant and the heat stabilizer were heated and mixed at 45° C. for 20 minutes to obtain a mixture B; S22: heating and mixing the TPEE and the mixture B at 45° C. and 500 rpm for 20 min, then adding a weathering agent and continuing to mix at 45° C. and 500 rpm for 15 min to obtain a mixture C; S23: Add the mixture C into a twin-screw extruder for melt blending, and add the mixture A from the side feeding port. The temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160°C, the temperature of zone 2 is 170°C, the temperature of zone 3 is 175°C, the temperature of zone 4 is 180°C, the temperature of zone 5 is 185°C, the temperature of zone 6 is 190°C, the temperature of zone 7 is 195°C, the temperature of zone 8 is 200°C, the temperature of zone 9 is 205°C, the temperature of the die is 210°C, and the modified TPEE material-II is obtained by extrusion and granulation.

[0025] Preparation Example 3 This case is to prepare modified TPEE materials, the formula is as follows: Modified TPEE material-III includes the following materials in parts by weight: 45 parts of TPEE, 25 parts of CPE, 20 parts of ABS, 4 parts of polymeric carbodiimide KSJ-936, 4 parts of antioxidant 1010, 6 parts of molybdenum disulfide, 1 part of light stabilizer 119, and 0.5 parts of BASF Irganox245; The preparation method of the modified TPEE material of the above formula includes the following steps: S21: drying TPEE, CPE and ABS at 90° C. for 4 h respectively, and premixing the CPE and ABS at 600 rpm for 15 min to obtain a mixture A; At the same time, the hydrolysis stabilizer, the friction reducing agent, the antioxidant and the heat stabilizer were heated and mixed at 38° C. for 30 minutes to obtain a mixture B; S22: heating and mixing the TPEE and the mixture B at 38° C. and 600 rpm for 15 min, then adding a weathering agent and continuing to mix at 38° C. and 600 rpm for 10 min to obtain a mixture C; S23: Add the mixture C into a twin-screw extruder for melt blending, and add the mixture A from the side feeding port. The temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160°C, the temperature of zone 2 is 170°C, the temperature of zone 3 is 175°C, the temperature of zone 4 is 180°C, the temperature of zone 5 is 185°C, the temperature of zone 6 is 190°C, the temperature of zone 7 is 195°C, the temperature of zone 8 is 200°C, the temperature of zone 9 is 205°C, the temperature of the die is 210°C, and the modified TPEE material-III is obtained by extrusion and granulation.

[0026] Example 1

[0027] A method for manufacturing a long fiber reinforced high pressure aeration hose, the process flow chart is as follows Figure 1 As shown, the following steps are included: S1. According to the design requirements of the DN65 model tube, multiple strands of polyester long fibers are used as warp (2DC double warp) and weft (4DC single weft) for twill weaving (warp density 187 strands, weft density 58 strands) to obtain a cylindrical strip blank for standby use; S2, the strip blank is passed through the core of the co-extrusion die (the core diameter determines the inner diameter of the hose, and the corresponding core is selected according to the corresponding model), and the dried modified TPEE material-I is sucked into the extruder at the same time, and the extruder causes the modified TPEE material-I to form a melt extrusion, and the extrusion temperature of the extruder is set to 200℃-210℃. After the modified TPEE material-I is melted at high temperature, it penetrates into the strip blank through the front die of the co-extrusion die (the front die caliber determines the outer diameter of the hose, thereby controlling the overall hose wall thickness and the overlapping penetration amount), that is, the thickness of the two parts overlap and penetrate in the radial section, and the modified TPEE material-I is extruded by the one-time molding co-extrusion penetration process. Under the traction of the traction machine, the modified TPEE material-I is cooled by the water tank to form a rubber hose from the outer surface of the strip blank to its inner part thickness, and then it is continuously pulled to the laser punching equipment for surface punching and then rolled up. The extrusion speed is consistent with the traction speed, both set to 450m / h, thereby obtaining a prefabricated hose; The overall thickness of the obtained prefabricated hose is 1.4mm, of which the thickness of the entire hose layer is 0.85mm, the thickness of the entire strip layer is 1.0mm, and the overlapping penetration thickness of the hose and the strip is 0.45mm, that is, the overlapping penetration thickness is about 52.9% of the entire hose layer thickness. The schematic diagram of its axial section structure is shown in Figure 2 As shown, the radial cross-sectional structure diagram is as follows Figure 3 As shown, its structure is: the rubber tube formed by the modified TPEE material-Ⅰ is outside and the strip blank is inside, and the thickness of the rubber tube and the strip blank in the radial section partially overlaps and penetrates, and aeration micropores are regularly distributed on the surface of the rubber tube (hole density is 1800 / m, hole diameter is 0.2mm, and the spacing between two adjacent holes is 1mm), and the depth of the hole is equal to the thickness of the entire layer of the rubber tube; S3, the prefabricated hose is turned over on the inner and outer surfaces by using a belt turning device. The turning process is shown in Figure 2 , and finally a long fiber reinforced high-pressure aeration hose is formed, whose structure is: the rubber hose is used as a modified TPEE inner lining layer inside, the strip blank is used as a long fiber braided outer reinforcement layer outside, and aeration micropores are regularly distributed on the modified TPEE inner lining layer, the modified TPEE inner lining layer and the long fiber braided outer reinforcement layer overlap and penetrate in thickness in the radial section, and the modified TPEE inner lining layer has regularly distributed aeration micropores (the arrangement of the pores is described in S2 and will not be repeated here).

[0028] Example 2

[0029] According to the design requirements of the DN50 model tube, multiple strands of polyester long fibers are used as warp (2DC double warp) and weft (4DC single weft) for twill weaving (warp density 151, weft density 58) to obtain a cylindrical strip blank for standby use; S2, pass the strip blank on the core of the co-extrusion die (the core diameter determines the inner diameter of the hose, and the corresponding core is selected according to the corresponding model), and at the same time, suck the dried modified TPEE material-II into the extruder, and the extruder causes the modified TPEE material-II to form a melt extrusion, and the extrusion temperature of the extruder is set to 200℃-210℃. After the modified TPEE material-II is melted at high temperature, it penetrates into the strip blank through the front die of the co-extrusion die (the front die caliber determines the outer diameter of the hose, thereby controlling the overall wall thickness of the hose and the amount of overlapping penetration), that is, the thickness of the two parts overlap and penetrate in the radial section, and after being extruded by a one-time co-extrusion process, under the traction of the traction machine, the modified TPEE material-II is water-cooled in a water tank to form a hose from the outer surface of the strip blank to its inner part thickness, and then continues to be pulled to the laser punching equipment for surface punching and then rolled up, and the extrusion speed is consistent with the traction speed, both set to 450m / h, thereby obtaining a prefabricated hose; The overall thickness of the obtained prefabricated hose is 1.2mm, of which the thickness of the entire hose layer is 0.75mm, the thickness of the entire strip layer is 0.85mm, and the overlapping penetration thickness of the hose and the strip is 0.40mm, that is, the overlapping penetration thickness is about 53.3% of the thickness of the entire hose layer. The schematic diagram of its axial section structure is shown in Figure 2 As shown, the radial cross-sectional structure diagram is as follows Figure 3 As shown, its structure is: the rubber tube formed by the modified TPEE material-II is outside and the strip blank is inside, and the thickness of the rubber tube and the strip blank in the radial section partially overlaps and penetrates, and aeration micropores are regularly distributed on the surface of the rubber tube (pore density is 1600 / m, hole diameter is 0.2mm, and the spacing between two adjacent holes is 1mm), and the depth of the hole is equal to the thickness of the entire layer of the rubber tube; S3, the prefabricated hose is turned over on the inner and outer surfaces by using a belt turning device. The turning process is shown in Figure 2 , and finally a long fiber reinforced high-pressure aeration hose is formed, whose structure is: the rubber hose is used as a modified TPEE inner lining layer inside, the strip blank is used as a long fiber braided outer reinforcement layer outside, and aeration micropores are regularly distributed on the TPEE inner lining layer, the modified TPEE inner lining layer and the long fiber braided outer reinforcement layer overlap and penetrate in thickness in the radial section, and the modified TPEE inner lining layer has regularly distributed aeration micropores (the arrangement of the pores is described in S2 and will not be repeated here).

[0030] Example 3

[0031] According to the design requirements of the DN76 model tube, multiple strands of polyester long fibers are used as warp (2DC double warp) and weft (6DC single weft) for twill weaving (warp density 217, weft density 58) to obtain a cylindrical strip blank for standby use; S2, pass the strip blank on the core of the co-extrusion die (the core diameter determines the inner diameter of the hose, and the corresponding core is selected according to the corresponding model), and at the same time, suck the dried modified TPEE material-III into the extruder, and the extruder makes the modified TPEE material-III form a melt extrusion, and the extrusion temperature of the extruder is set to 200℃-210℃. After the modified TPEE material-III is melted at high temperature, it penetrates into the strip blank through the front die of the co-extrusion die (the front die caliber determines the outer diameter of the hose, thereby controlling the overall hose wall thickness and the overlapping penetration amount), that is, the thickness of the two parts overlap and penetrate in the radial section, and after being extruded by the one-time molding co-extrusion penetration process, under the traction of the traction machine, the modified TPEE material-III is water-cooled in a water tank to form a hose from the outer surface of the strip blank to its inner part thickness, and then continues to be pulled to the laser punching equipment for surface punching and then rolled up, and the extrusion speed is consistent with the traction speed, both set to 450m / h, thereby obtaining a prefabricated hose; The overall thickness of the obtained prefabricated hose is 1.6mm, of which the thickness of the entire hose layer is 1.0mm, the thickness of the entire strip layer is 1.15mm, and the overlapping penetration thickness of the hose and the strip is 0.55mm, that is, the overlapping penetration thickness is about 55% of the entire hose layer thickness. The schematic diagram of its axial section structure is shown in Figure 2 As shown, the radial cross-sectional structure diagram is as follows Figure 3 As shown, its structure is: the rubber tube formed by the modified TPEE material-III is outside and the strip blank is inside, and the thickness of the rubber tube and the strip blank in the radial section partially overlaps and penetrates, and aeration micropores are regularly distributed on the surface of the rubber tube (pore density is 2000 / m, hole diameter is 0.2mm, and the spacing between two adjacent holes is 1mm), and the depth of the hole is equal to the thickness of the entire layer of the rubber tube; S3, the prefabricated hose is turned over on the inner and outer surfaces by using a belt turning device. The turning process is shown in Figure 2, and finally a long fiber reinforced high-pressure aeration hose is formed, whose structure is: the rubber hose is used as a modified TPEE inner lining layer inside, the strip blank is used as a long fiber braided outer reinforcement layer outside, and aeration micropores are regularly distributed on the TPEE inner lining layer, the modified TPEE inner lining layer and the long fiber braided outer reinforcement layer overlap and penetrate in thickness in the radial section, and the modified TPEE inner lining layer has regularly distributed aeration micropores (the arrangement of the pores is described in S2 and will not be repeated here).

[0032] Comparative Example 1 This case is only a single-layer TPU hose without a fiber-woven reinforcement layer. The overall wall thickness is 1.0 mm, and the aeration micropore parameters are the same as in Example 1 (hole depth = hose wall thickness 1.0 mm).

[0033] The material composition of the TPU hose is the same as that of Preparation Example 1, except that it does not contain CPE and ABS, and the weight parts of CPE and ABS are supplemented to the weight parts of TPU.

[0034] Comparative Example 2 This case is only a single-layer TPEE hose without a fiber-woven reinforcement layer. The overall wall thickness is 1.0 mm, and the aeration micropore parameters are the same as those in Example 1 (the pore depth is the same as that in Comparative Example 1).

[0035] The material composition of the TPEE hose is the same as that of Preparation Example 1, except that it does not contain CPE and ABS, and the weight parts of CPE and ABS are supplemented to the weight parts of TPEE.

[0036] Comparative Example 3 The preparation process of this case is the same as that of Example 1, except that S2 does not use a one-time co-extrusion process, but instead coats the surface of the strip with modified TPEE material-Ⅰ, which is melted at high temperature using a coating device and then coated on the surface of the strip. Subsequent punching, flipping, and other operations are the same as those of Example 1, so that the wall thickness of the final product is 1.6 mm. It was observed that the sprayed material did not penetrate into the strip in this case.

[0037] Comparative Example 4 The preparation process of this case is the same as that of Example 1, except that the overall thickness of the obtained prefabricated hose is 1.3 mm by adjusting the front die diameter of the co-extrusion die, wherein the thickness of the entire layer of the hose is 0.85 mm, the thickness of the entire layer of the strip is 1.0 mm, and the overlapping penetration thickness of the hose and the strip is 0.55 mm, that is, the overlapping penetration thickness is approximately 64.7% of the thickness of the entire layer of the hose.

[0038] Comparative Example 5 The preparation process of this case is the same as that of Example 1, except that the overall thickness of the obtained prefabricated hose is 1.55 mm by adjusting the front die diameter of the co-extrusion die, wherein the thickness of the entire layer of the hose is 0.85 mm, the thickness of the entire layer of the strip is 1.0 mm, and the overlapping penetration thickness of the hose and the strip is 0.3 mm, that is, the overlapping penetration thickness is approximately 35.3% of the thickness of the entire layer of the hose.

[0039] After the aeration hose was aerated in the acidic medium for 168h, 336h, 504h, and 672h, samples were taken to test the physical properties of the samples (test reference standard number GBT528-1998), tensile strength, elongation, hardness change rate, and the physical property change rate was calculated. The results are shown in Table 1. The aeration efficiency was tested by pressurization (test reference standard number JB / T 11378-2013), and the results are shown in Table 2.

[0040] Table 1 Comparison of physical properties of each case after aeration

[0041] As can be seen from Table 1, when Example 1 is compared with Comparative Examples 1-2, although the initial strength of Comparative Examples 1-2 is higher than that of Example 1, after being immersed in an acidic medium for 168 to 672 hours, the strength change rate of the hose of Comparative Examples 1-2 decreases significantly; when Example 1 is compared with Comparative Example 3, Comparative Example 3 has a process of coating the modified TPEE material on the surface of the long fiber, and Comparative Examples 4 and 5 do not control the thickness of the overlapping penetration within the range of 50%-60% of the thickness of the inner lining layer. Under the same acidic medium environment, the strength change rate is relatively high, and when preparing the aeration hose of the same specification, the pressure bearing capacity of Example 1 of the present invention is greatly improved. Under the same use environment, the strength change rate of the present invention under acidic medium is lower, and the present invention uses TPEE material composite long fiber reinforcement to have better stability under acidic conditions.

[0042] Table 2 Aeration efficiency of each case

[0043] It can be seen from Table 2 that the different compositions of the materials of Comparative Example 1 and Comparative Example 2 make the aeration efficiency worse than that of Example 1; the different attachment processes of the modified TPEE materials in Comparative Example 3 and the overlapping penetration thicknesses of Comparative Example 4 and Comparative Example 5 are outside the range of 50%-60% of the thickness of the inner lining layer, which cannot achieve a good aeration effect. The present invention greatly improves the pressure bearing capacity of the overall hose by compounding the modified TPEE material with the long fiber and controlling the overlapping penetration thickness within the range of 50%-60% of the thickness of the inner lining layer, and achieves a higher aeration efficiency for hoses of the same caliber through pressurization.

[0044] The aeration hose manufactured by the method of the present invention not only has higher aeration efficiency, but also has better stability under acidic conditions.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A long fiber reinforced high pressure aeration hose, characterized in that: It includes a long fiber braided outer reinforcement layer and a modified TPEE inner lining layer, wherein the modified TPEE inner lining layer and the long fiber braided outer reinforcement layer partially overlap and penetrate in thickness in a radial cross section, and the modified TPEE inner lining layer has regularly distributed aeration micropores; The thickness of the overlapping penetration accounts for 50%-60% of the thickness of the modified TPEE liner layer.

2. A long fiber reinforced high pressure aeration hose according to claim 1, characterized in that: The material of the modified TPEE lining layer is a modified TPEE material, and the modified TPEE material includes the following main materials in parts by weight: 30 parts to 50 parts of thermoplastic polyester elastomer, 15 parts to 25 parts of chlorinated polyethylene, and 10 parts to 20 parts of acrylonitrile-butadiene-styrene terpolymer.

3. A long fiber reinforced high pressure aeration hose according to claim 2, characterized in that: The modified TPEE material also includes the following auxiliary materials in parts by weight: 2-4 parts of hydrolysis stabilizer, 2-5 parts of antioxidant, 4-6 parts of wear reducer, 0.5-1 part of weathering agent, and 0.2-0.5 parts of heat stabilizer.

4. The long fiber reinforced high pressure aeration hose according to claim 3, characterized in that: The hydrolysis stabilizer is polymeric carbodiimide; the antioxidant is antioxidant 1010; the friction reducer is selected from one or more of molybdenum disulfide and graphite, and the particle size is less than 0.5 mm; the weathering agent is light stabilizer 119; and the heat stabilizer is BASF Irganox245.

5. A long fiber reinforced high pressure aeration hose according to any one of claims 1 to 4, characterized in that: The long fiber braided outer reinforcement layer is made of long fibers woven into a cylindrical strip by warp and weft according to design requirements, and the long fibers are selected from one or more of polyester fibers, aramid fibers, and continuous carbon fibers; The thickness of the modified TPEE lining layer is in the range of 0.7 mm to 2 mm.

6. A long fiber reinforced high pressure aeration hose according to any one of claims 1 to 4, characterized in that: The number of aeration micropores in the range of 1500 to 3000 is distributed per meter on the long fiber reinforced high-pressure aeration hose; the hole diameter of the aeration micropores is in the range of 0.15 mm to 0.25 mm.

7. A method for manufacturing a long fiber reinforced high pressure aeration hose, applicable to a long fiber reinforced high pressure aeration hose as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1, using long fibers to weave warp and weft into a cylindrical strip blank according to design requirements, and waiting for use; S2, passing the strip blank on the core of the co-extrusion die, and at the same time sucking the dried modified TPEE material into the extruder, the extruder causes the modified TPEE material to form a melt extrusion, and the melt penetrates into the strip blank through the front die of the co-extrusion die, that is, the thickness of the two parts in the radial section overlaps and penetrates, and the co-extrusion penetration extrusion is formed in one time, and then it is cooled and surface laser punched under the action of traction, and then rolled up to obtain a prefabricated hose; S3, the prefabricated hose is turned over on the inner and outer surfaces by using a belt turning device, and finally a long fiber reinforced high-pressure aeration hose is formed, the structure of which is: The modified TPEE material is used as a modified TPEE inner lining layer inside, the strip blank is used as a long fiber woven outer reinforcement layer outside, and aeration micropores are regularly distributed on the modified TPEE inner lining layer. The modified TPEE inner lining layer and the long fiber woven outer reinforcement layer overlap and penetrate, and the thickness of the overlapping penetration accounts for 50%-60% of the thickness of the modified TPEE inner lining layer.

8. The method for manufacturing a long fiber reinforced high pressure aeration hose according to claim 7, characterized in that: The modified TPEE material is processed by the following steps: S21: drying a thermoplastic polyester elastomer, a chlorinated polyethylene, and an acrylonitrile-butadiene-styrene terpolymer respectively, and premixing the chlorinated polyethylene and the acrylonitrile-butadiene-styrene terpolymer to obtain a mixture A; At the same time, premix the hydrolysis stabilizer, the friction reducing agent, the antioxidant and the heat stabilizer to obtain a mixture B; S22: heating and mixing the thermoplastic polyester elastomer and the mixture B, and then adding a weathering agent and mixing to obtain a mixture C; S23: melt-blending the mixture C, adding the mixture A from a side feed port, extruding and granulating to obtain a modified TPEE material.

9. The method for manufacturing a long fiber reinforced high pressure aeration hose according to claim 8, characterized in that: The temperature of the heating and mixing is 35°C-45°C; the mixing rate of the overall steps S21 and S22 is 300rpm-600rpm, and the mixing time is at least 10min; The melt blending in S23 is carried out in a twin-screw extruder, and the temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160°C, the temperature of zone 2 is 170°C, the temperature of zone 3 is 175°C, the temperature of zone 4 is 180°C, the temperature of zone 5 is 185°C, the temperature of zone 6 is 190°C, the temperature of zone 7 is 195°C, the temperature of zone 8 is 200°C, the temperature of zone 9 is 205°C, and the temperature of the die is 210°C.

10. The method for manufacturing a long fiber reinforced high pressure aeration hose according to claim 7, characterized in that: The extrusion temperature of the extruder in S2 for forming a melt of the modified TPEE material is 200°C-210°C.

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