Outer-rubber inner-fiber condensing agent conveying sleeve and manufacturing method

Abstract

The invention discloses an outer-rubber inner-fiber condensing agent conveying sleeve and a manufacturing method, and belongs to the technical field of sleeves. The technical problems that an existing conveying sleeve is poor in mechanical property, poor in high-temperature / low-temperature resistance and oil / chemical solvent resistance and the like are solved. According to the technical scheme, the outer-rubber inner-fiber condensing agent conveying sleeve is composed of an inner lining layer, a braid layer and a sheath layer from inside to outside, the inner lining layer is made of vulcanized acrylate rubber, the braid layer is made of aramid fiber or polyimide fiber, and the sheath layer is made of vulcanized fluororubber.

Description

Technical Field

[0001] This invention belongs to the field of sleeve technology, specifically relating to an outer rubber and inner fiber condenser delivery sleeve and its manufacturing method. Background Technology

[0002] With the development of industries such as locomotives, aerospace, shipbuilding, military, and new energy, the requirements for the use of sleeves are constantly increasing. Especially in harsh environments such as high temperature and rapid cooling, conventional fiberglass sleeves and silicone braided fiber sleeves have poor mechanical properties, oil resistance, solvent resistance, and high temperature resistance. At the same time, their thermal conductivity is also poor, which cannot meet the needs of rapid cooling in harsh environments.

[0003] Relevant patent documents retrieved: This document, published in China (CN101628485A) on January 20, 2010, discloses a method for manufacturing an intercooler hose. The method includes the following steps: ① mixing ethylene / acrylate rubber and fluororubber compounds separately; ② composite extrusion of the inner and middle layers; ③ weaving an aramid fiber reinforcement layer onto the hose blank extruded in step ② on a knitting machine; ④ extrusion of the outer layer; ⑤ cooling and cutting the hose blank; ⑥ placing the cut hose blank in a vulcanizing tank for pressurized vulcanization; ⑦ cleaning the vulcanized hose, cutting off the excess ends, and marking the product with a trademark and design number using an inkjet printer. Using the above components and manufacturing method allows for continuous production, significantly improving production efficiency and reducing manufacturing costs.

[0004] Relevant non-patent literature retrieved: The journal is titled "Modern Plastics Processing and Application", the article title is "Influence of Different VA Contents on the Performance of High Flame Retardant Heat Shrink Tubing of EVA", volume number 35 (01), and the publication date is March 21, 2023. This article uses a melt flow rate tester, tensile testing machine, horizontal and vertical burning tester and oxygen index tester to study the influence of different vinyl acetate (VA) contents on the performance of high flame retardant heat shrink tubing of ethylene-vinyl acetate copolymer (EVA). The results showed that when the VA mass fraction increased from 15.00% to 28.00%, the limiting oxygen index of the sample increased from 33% to 38%, the VW-1 vertical burning flame retardancy rating of the 3.0 mm thick sample increased from V-2 to V-0, and the self-extinguishing time decreased from more than 60 s to 45 s, indicating a gradual improvement in flame retardancy performance. The tensile strength of the EVA high flame retardant heat shrink tubing before aging increased from 8.63 MPa to 13.78 MPa, and the elongation at break increased from 312.68% to 533.57%.

[0005] The prior art represented by the aforementioned documents has at least the following unresolved technical problems or defects: The mechanical properties, high / low temperature resistance, and oil / chemical solvent resistance of the intercooler hoses in the aforementioned invention patents are still unsatisfactory, and the manufacturing process is complicated and the production cost is high.

[0006] Therefore, there is an urgent need in the field to provide a conveying sleeve with good mechanical properties and better resistance to high temperature, low temperature, oil, and chemical solvents. Summary of the Invention

[0007] The purpose of this invention is to provide: A rubber-coated, fiber-insulated coolant delivery sleeve and its manufacturing method, along with related technologies, are provided to solve the technical problems of poor mechanical properties, poor high / low temperature resistance, and poor oil / chemical solvent resistance of existing delivery sleeves, or combinations thereof.

[0008] Terminology Explanation: Unless otherwise defined, all technical terms in this invention have the same meanings as commonly understood by one of ordinary skill in the art to which the subject matter of the claims pertains. Unless otherwise stated, all patents, patent inventions, and disclosures referenced in this invention are incorporated herein by reference in their entirety. If multiple definitions exist for terms in this invention, the definitions in this chapter shall prevail.

[0009] It should be understood that the above brief description and the following detailed description are exemplary and for illustrative purposes only, and do not limit the subject matter of the invention in any way. In this invention, the singular is used in conjunction with the plural unless otherwise specifically stated. It should also be noted that, unless otherwise stated, the use of “or” or “or” means “and / or”. Furthermore, the use of the term “comprising” and other forms such as “including,” “containing,” and “contains” are not limiting.

[0010] The definition of the standard chemical term can be found in the reference "High Voltage Bushings and Their Insulation", Chongqing University Press, 2022.

[0011] Unless otherwise stated, conventional methods within the scope of the art, such as tests for fracture strength, elongation at break, and abrasion resistance, shall be used.

[0012] Unless specifically defined, the use of various commercially available products in this invention employs standard techniques. For example, it may be carried out using the manufacturer's instructions for use with the reagent kit, or in accordance with methods known in the art or the description of this invention. The techniques and methods described herein can generally be implemented according to conventional methods well known in the art, based on the descriptions in the various summary and more specific documents cited and discussed in this specification.

[0013] The terms “optional / arbitrary” or “optionally / arbitrarily” mean that the event or situation described below may or may not occur, including both the occurrence and non-occurrence of the event or situation.

[0014] The term "acrylate rubber (ACM)" as used in this invention refers to a functional rubber polymerized from a main monomer (acrylate), a vulcanizing monomer, and a low-temperature oil-resistant monomer. Its main chain is a saturated carbon chain, and its side groups are polar ester groups, making it a heat- and oil-resistant specialty rubber. It is mainly used for various heat- and oil-resistant seals, gaskets, and oil seals in automobiles and locomotives.

[0015] The term "ethylene acrylate rubber AEM" as used in this invention refers to a copolymer of ethyl acrylate or other acrylates with ethylene.

[0016] The term "aramid fiber 1313" used in this invention, also known as poly(m-phenylene isophthalamide) fiber, refers to fiber produced by solution spinning after the polycondensation of m-phenylene diamine and isophthaloyl chloride. This material possesses high temperature resistance (long-term use at 220℃), inherent flame retardancy (limiting oxygen index > 28%), excellent electrical insulation (breakdown voltage 20 kV / mm), and corrosion resistance, and is widely used in fire-fighting protective clothing, aerospace honeycomb structural components, high-temperature filter materials, and electrical insulation.

[0017] The term "aramid fiber 1414" used in this invention, also known as poly(p-phenylene terephthalamide), refers to a fully para-polyaramid synthesized by the condensation polymerization of p-phenylenediamine and terephthaloyl chloride. This substance exhibits lyotropic liquid crystal properties, a thermal decomposition temperature of up to 560°C, and fiber strength five times that of steel. It is mainly used in bulletproof equipment, composite materials, and civil engineering reinforcement.

[0018] The term "fluororubber" as used in this invention refers to a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of its main chain or side chains. The introduction of fluorine atoms endows rubber with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance, and atmospheric aging resistance, leading to its widespread application in aerospace, aviation, automotive, petroleum, and household appliance industries.

[0019] In a first aspect, the present invention provides: A rubber-lined, fiber-lined condenser delivery sleeve comprises, from the inside out, an inner lining, a braided layer, and a sheath layer. The inner lining is made of vulcanized acrylate rubber, the braided layer is made of aramid fiber or polyimide fiber, and the sheath layer is made of vulcanized fluororubber.

[0020] Technical features include: acrylate rubber, aramid fiber, polyimide fiber, and fluororubber, etc.

[0021] The technical feature “acrylate rubber” includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM.

[0022] Among them, the technical feature "acrylate rubber" is preferably: ethylene acrylate rubber AEM and acrylate rubber ACM.

[0023] The technical feature “aramid fiber” is selected from aramid fiber 1313 or aramid fiber 1414.

[0024] The technical feature “polyimide fiber” is: polyetherimide.

[0025] The technical feature "fluororubber" includes one or more of the following: binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber.

[0026] The preferred technical feature "fluororubber" is binary fluororubber, ternary fluororubber, fluorosilicone rubber, or perfluoroether rubber.

[0027] The technical feature "fluororubber" is further preferably fluorosilicone rubber or perfluoroether rubber.

[0028] Based on further solutions to the technical problems of the present invention, or simultaneous solutions to multiple technical problems, the preferred solution in the technical solution provided in the first aspect of the present invention includes: The first preferred embodiment: the acrylate rubber includes one or both of ethylene acrylate rubber (AEM) and acrylate rubber (ACM). This technical solution, in addition to addressing the technical problem of "the existing conveying sleeve having poor mechanical properties," further addresses the technical problem of "the existing conveying sleeve having poor high / low temperature resistance and oil / chemical solvent resistance."

[0029] The second preferred embodiment: the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide. This technical solution, while addressing the technical problem of "the existing conveying sleeve having poor mechanical properties," further solves the technical problem of "the existing conveying sleeve having poor high / low temperature resistance and oil / chemical solvent resistance."

[0030] The third preferred embodiment: The fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber. This technical solution, in addition to addressing the technical problem of "the existing conveying sleeve having poor mechanical properties," further solves the technical problem of "the existing conveying sleeve having poor high / low temperature resistance and oil / chemical solvent resistance."

[0031] Secondly, the present invention provides: The manufacturing method of the above-mentioned outer rubber and inner fiber condensate delivery sleeve includes the following steps: (1) The inner lining is obtained by first modifying and mixing acrylic rubber and then vulcanizing it; (2) Then, the outer side of the inner lining layer is woven with aramid fiber or polyimide fiber to obtain a woven layer; (3) Finally, fluororubber is used to modify and mix the outer side of the braided layer, and vulcanization is performed to obtain the final product.

[0032] It includes the following technical features: the modified compounding process described in step (1); the vulcanization process described in step (1); the weaving method described in step (2); the modified compounding process described in step (3); the vulcanization process described in step (3), etc.

[0033] The technical feature “the process of modified compounding described in step (1)” includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and colorant.

[0034] The technical feature “the vulcanization process described in step (1)” includes: extrusion and vulcanization using a vulcanizing agent and an accelerator.

[0035] It also includes technical features such as: antioxidants; vulcanizing agents; and the weight ratio of acrylic rubber, silica, barium sulfate, antioxidants, stearic acid, pigments, vulcanizing agents, and accelerators.

[0036] The technical feature “antioxidant” is selected from one or more of antioxidant 405, antioxidant 445 and dinitrophenol.

[0037] The preferred technical feature "anti-aging agent" is anti-aging agent 405.

[0038] The technical feature “vulcanizing agent” is selected from one or both of the following: bis(2,4) vulcanizing agent and bis(2,5) vulcanizing agent.

[0039] Among them, the preferred technical feature "vulcanizing agent" is: bis(2,4) vulcanizing agent.

[0040] The technical characteristic "weight ratio of acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent and accelerator" is: 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2.

[0041] The preferred technical feature is the weight ratio of acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent and accelerator: 100:40:10:1:2:3:1:1.

[0042] Among them, the technical feature “the method of weaving aramid fibers described in step (2)” is: plain weave or twill weave.

[0043] The technical feature “the modified compounding process described in step (3)” includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, carbamate and color powder.

[0044] Among them, the technical feature “vulcanization in step (3)” uses bisphenol AF and benzyltriphenylphosphine chloride for extrusion and vulcanization.

[0045] It also includes technical features such as: pigments; the weight ratio of fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigments, bisphenol AF, and benzyl triphenyl chloride, etc.

[0046] The technical characteristic "weight ratio of fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride" is: 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2.

[0047] The preferred weight ratio of the technical feature "fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride" is 100:5:30:3:1:2:1:1.

[0048] Based on further solutions to the technical problems of the present invention, or simultaneous solutions to multiple technical problems, the preferred solution in the technical solution provided in the second aspect of the present invention includes: The first preferred option: The modified compounding process in step (1) includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and colorant; the vulcanization is carried out by extrusion and vulcanization using a vulcanizing agent and an accelerator. This technical solution not only solves the technical problem of "the existing conveying sleeve has poor mechanical properties", but also further solves the technical problem of "the existing conveying sleeve has poor high temperature / low temperature resistance and oil / chemical solvent resistance".

[0049] The second preferred embodiment: the antioxidant is selected from one or more of antioxidant 405, antioxidant 445, and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-dimethylisocyanurate and bis(2,5)-dimethylisocyanurate; the accelerator is triallyl isocyanurate; the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent, and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-3:0.5-2:0.5-2. This technical solution, while addressing the technical problem of "inadequate mechanical properties of existing conveying sleeves," further solves the technical problem of "inadequate high / low temperature resistance and oil / chemical solvent resistance of existing conveying sleeves."

[0050] The third preferred solution is that the weaving method described in step (2) is a plain weave or a twill weave. This technical solution not only solves the technical problem of "the existing conveying sleeve has poor mechanical properties", but also further solves the technical problem of "the existing conveying sleeve has poor high temperature / low temperature resistance and oil / chemical solvent resistance".

[0051] The fourth preferred option: The modified compounding process in step (3) includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax and color powder; the vulcanization is carried out by extrusion and vulcanization using bisphenol AF and benzyltriphenylphosphine chloride. This technical solution not only solves the technical problem of "the existing conveying sleeve has poor mechanical properties", but also further solves the technical problem of "the existing conveying sleeve has poor high temperature / low temperature resistance and oil / chemical solvent resistance".

[0052] The fifth preferred embodiment: the weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF, and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2. This technical solution, in addition to addressing the technical problem of "inadequate mechanical properties of existing conveying sleeves," further solves the technical problem of "inadequate high / low temperature resistance and oil / chemical solvent resistance of existing conveying sleeves."

[0053] Embodiments 1-4 of this invention at least support the protection scope of claim 1.

[0054] The technical feature “an outer rubber and inner fiber condenser delivery sleeve, consisting of an inner lining layer, a braided layer and a sheath layer from the inside out, wherein the inner lining layer is vulcanized acrylate rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber” is summarized from the foregoing explanation of the present invention and / or Examples 1-4 by the common feature “outer rubber and inner fiber condenser delivery sleeve”. Therefore, those skilled in the art can reasonably presume that the technical feature “an outer rubber and inner fiber condenser conveying sleeve, composed from the inside out of an inner lining layer, a braided layer, and a sheath layer, wherein the inner lining layer is vulcanized acrylate rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber” and “an outer rubber and inner fiber condenser conveying sleeve, composed from the inside out of an inner lining layer, a braided layer, and a sheath layer, wherein the inner lining layer is vulcanized acrylate rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber” are subordinate concepts, and “an outer rubber and inner fiber condenser conveying sleeve” are also subordinate concepts. The technical means that are essentially equivalent to the technical means of “a rubber-coated and fiber-insulated condenser conveying sleeve, consisting of an inner lining layer, a braided layer, and a sheath layer from the inside out, wherein the inner lining layer is vulcanized acrylate rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber”, and that can replace the technical means of “an outer rubber and inner fiber condenser conveying sleeve, consisting of an inner lining layer, a braided layer, and a sheath layer from the inside out, wherein the inner lining layer is vulcanized acrylate rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber” within the scope of protection of claim 1, should all fall within the scope of protection of claim 1.

[0055] Embodiments 1-4 of this invention at least support the protection scope of claim 2.

[0056] The technical feature "the acrylate rubber includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM" is derived from the foregoing explanation of this invention and / or Examples 1-4 through the common feature "acrylate rubber". Therefore, those skilled in the art can reasonably presume that the subordinate concepts of "the acrylate rubber includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM", the essentially equivalent technical means of "the acrylate rubber includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM", and the technical means that can replace "the acrylate rubber includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM" based on the existing technical level and common knowledge should all fall within the protection scope of claim 2.

[0057] Embodiments 1-4 of this invention at least support the protection scope of claim 3.

[0058] The technical feature “the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide” is summarized from the foregoing explanation of the present invention and / or Examples 1-4 by the common feature “aramid fiber”. Therefore, based on reasonable presumption, those skilled in the art can determine that the subordinate concepts of the technical feature "the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide", "the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide", the essentially equivalent technical means of "the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide", and the technical means that can replace "the aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide" based on the existing level of technology and within conventional technical means and common knowledge, should all fall within the protection scope of claim 3.

[0059] Embodiments 1-4 of this invention at least support the protection scope of claim 4.

[0060] The technical feature "the fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber" is derived from the foregoing explanation of this invention and / or Examples 1-4 through the common feature "fluororubber". Therefore, those skilled in the art can reasonably infer that the subordinate concepts of "the fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber", the essentially equivalent technical means of "the fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber", and the technical means that can replace "the fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber" based on the existing technical level and within the scope of common knowledge should all fall within the protection scope of claim 4.

[0061] Embodiments 1-4 of this invention at least support the protection scope of claim 5.

[0062] The technical feature “a method for manufacturing an outer rubber and inner fiber condenser conveying sleeve includes the following steps: first, acrylate rubber is modified and mixed, and then vulcanized to obtain an inner lining layer; then, the outer side of the inner lining layer is woven with aramid fiber or polyimide fiber to obtain a braided layer; finally, fluororubber is modified and mixed on the outer side of the braided layer, and vulcanized to obtain the desired product” is summarized from the foregoing explanation of this invention and / or Examples 1-4, based on the common feature “a method for manufacturing an outer rubber and inner fiber condenser conveying sleeve”. Therefore, those skilled in the art can reasonably presume that the technical feature "the method of manufacturing an outer rubber and inner fiber condenser conveying sleeve, including the following steps: first, modifying and mixing acrylate rubber, then vulcanizing it to obtain an inner lining layer; then weaving the outer side of the inner lining layer with aramid fiber or polyimide fiber to obtain a braided layer; finally, modifying and mixing fluororubber on the outer side of the braided layer, and then vulcanizing it to obtain the desired product" and "the method of manufacturing an outer rubber and inner fiber condenser conveying sleeve, including the following steps: first, modifying and mixing acrylate rubber, then vulcanizing it to obtain an inner lining layer; then weaving the outer side of the inner lining layer with aramid fiber or polyimide fiber to obtain a braided layer; finally, modifying and mixing fluororubber on the outer side of the braided layer, and then vulcanizing it to obtain the desired product" are subordinate concepts, and "the method of manufacturing an outer rubber and inner fiber condenser conveying sleeve" are subordinate concepts. The manufacturing method, including the following steps: first, modifying and mixing acrylate rubber, then vulcanizing it to obtain an inner lining layer; then, weaving the outer side of the inner lining layer with aramid fiber or polyimide fiber to obtain a braided layer; finally, modifying and mixing fluororubber on the outer side of the braided layer, and then vulcanizing it to obtain the desired product, is essentially equivalent to the technical means described in claim 5. The technical means that can replace the "outer rubber, inner fiber condenser conveying sleeve manufacturing method, including the following steps: first, modifying and mixing acrylate rubber, then vulcanizing it to obtain an inner lining layer; then, weaving the outer side of the inner lining layer with aramid fiber or polyimide fiber to obtain a braided layer; finally, modifying and mixing fluororubber on the outer side of the braided layer, and then vulcanizing it to obtain the desired product" based on existing technology and conventional technical means and common knowledge, should all fall within the protection scope of claim 5.

[0063] Embodiments 1-4 of this invention at least support the protection scope of claim 6.

[0064] The technical feature “the modified compounding process in step (1) includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and color powder; the vulcanization is carried out by extrusion and vulcanization using vulcanizing agent and accelerator” is summarized from the foregoing explanation of this invention and / or Examples 1-4 through the common feature “modified compounding in step (1)”. Therefore, those skilled in the art can reasonably infer that the technical feature “the modified compounding process in step (1) includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and color powder; the vulcanization is carried out by extrusion and vulcanization using vulcanizing agent and accelerator” and “the modified compounding process in step (1) includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and color powder; the vulcanization is carried out by extrusion and vulcanization using vulcanizing agent and accelerator” are subordinate concepts, and “the modified compounding process in step (1)” are also subordinate concepts. The process includes: mixing acrylic rubber, silica, barium sulfate, antioxidant, stearic acid and pigment; the vulcanization is carried out by extrusion and vulcanization using vulcanizing agent and accelerator. The technical means that can replace the modified mixing process in step (1) within the scope of conventional technical means and common knowledge based on the existing technical level should all fall within the protection scope of claim 6.

[0065] Embodiments 1-4 of this invention at least support the protection scope of claim 7.

[0066] The technical feature “the antioxidant is selected from one or more of antioxidant 405, antioxidant 445 and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-tetrachlorosulfurizing agent and bis(2,5)-pentachlorosulfurizing agent; the accelerator is triallyl isocyanurate; the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2” is summarized from the foregoing explanation and / or Examples 1-4 of this invention through common features. Therefore, those skilled in the art can reasonably infer that the technical feature "the antioxidant is selected from one or more of antioxidant 405, antioxidant 445, and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-tetrachlorosulfurizing agent and bis(2,5)-pentachlorosulfurizing agent; the accelerator is triallyl isocyanurate; the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent, and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-" 2. The following are subordinate concepts: "The antioxidant is selected from one or more of antioxidant 405, antioxidant 445, and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2-tetra) vulcanizing agent and bis(2-pent) vulcanizing agent; the accelerator is triallyl isocyanurate; the weight ratio of the acrylic rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent, and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2"; "The antioxidant is selected from antioxidant 405, antioxidant 445, and dinitrophenol"; "The antioxidant is selected from one or more of ... 5. One or more of antioxidant 445 and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-tetrachlorosulfurizing agent and bis(2,5)-pentachlorosulfurizing agent; the accelerator is triallyl isocyanurate; the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2”, which is a basically equivalent technical means, and can be replaced by conventional technical means and common knowledge based on the existing technical level. The technical means described in which "the antioxidant is selected from one or more of antioxidant 405, antioxidant 445 and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-tetrachlorosulfurizing agent and bis(2,5)-pentachlorosulfurizing agent; the accelerator is triallyl isocyanurate; and the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2" should all fall within the protection scope of claim 7.

[0067] Embodiments 1-4 of this invention at least support the protection scope of claim 8.

[0068] The technical feature “the weaving method described in step (2) is a plain weave or twill weave” is derived from the foregoing explanation of this invention and / or embodiments 1-4 through the common feature “the weaving method in step (2)”. Therefore, those skilled in the art can reasonably infer that the technical feature “the weaving method described in step (2) is a plain weave or twill weave”, the subordinate concept of “the weaving method described in step (2) is a plain weave or twill weave”, the technical means that are basically equivalent to “the weaving method described in step (2) is a plain weave or twill weave”, and the technical means that can replace “the weaving method described in step (2) is a plain weave or twill weave” based on the existing technical level and conventional technical means and common knowledge, should all fall within the protection scope of claim 8.

[0069] Embodiments 1-4 of this invention at least support the protection scope of claim 9.

[0070] The technical feature “the modified compounding process described in step (3) includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, brass wax and color powder; the vulcanization is carried out by extrusion and vulcanization using bisphenol AF and benzyltriphenylphosphine chloride” is summarized from the foregoing explanation of this invention and / or Examples 1-4 through the common feature “the modified compounding process described in step (3)”. Therefore, those skilled in the art can reasonably infer that the technical feature “the modified compounding process described in step (3) includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, brass wax and color powder; the vulcanization is carried out by extrusion and vulcanization using bisphenol AF and benzyltriphenylphosphine chloride” and “the modified compounding process described in step (3) includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, brass wax and color powder; the vulcanization is carried out by extrusion and vulcanization using bisphenol AF and benzyltriphenylphosphine chloride” are subordinate concepts of “the modified compounding process described in step (3)”. The process includes: mixing fluororubber, zinc oxide, barium sulfate, calcium oxide, brass wax and color powder; the vulcanization is carried out by extrusion and vulcanization of bisphenol AF and benzyltriphenylphosphine chloride. The technical means that can replace the modified mixing process in step (3) within the scope of conventional technical means and common knowledge based on the existing technical level should all fall within the protection scope of claim 9.

[0071] Embodiments 1-4 of this invention at least support the protection scope of claim 10.

[0072] The technical feature “the weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2” is summarized from the foregoing explanation of the present invention and / or Examples 1-4 through the common feature “the weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride”. Therefore, those skilled in the art can reasonably infer that the technical feature "the weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF, and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2" and "the weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF, and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2" are subordinate concepts, and "the ... weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF, and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2" are subordinate concepts. All technical means that are substantially equivalent to “the weight ratio of barium, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2”, and technical means that can replace “the weight ratio of fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2” based on existing technology and conventional technical means and common knowledge, should fall within the protection scope of claim 10.

[0073] The beneficial effects of this invention are as follows: The present invention has at least the following beneficial effects: Compared with existing technologies, the outer rubber and inner fiber condensate delivery sleeve of this invention has better technical performance in terms of mechanical properties, high temperature resistance, low temperature resistance, and oil / chemical solvent resistance, making it suitable for traditional processing methods. Simultaneously, it possesses excellent mechanical properties, high temperature resistance (fully meeting the 200℃ temperature rating), abrasion resistance, low temperature resistance, mildew resistance, and chemical solvent resistance, exhibiting superior comprehensive performance compared to traditional sleeves, and fully meeting the requirements of various ASTM, SAE, and IEC sheathing standards.

[0074] Therefore, the sleeve of the present invention can be applied to the cooling sleeve of new energy battery packs and permanent magnet motor rotors, which can effectively reduce heat dissipation and ensure the stable operation of power systems.

[0075] Furthermore, based on the present invention: Based on the comparison of Examples 1-4 and Comparative Example 1, the present invention employs a combination of technical means, such as "an outer rubber and inner fiber condenser conveying sleeve, composed of an inner lining layer, a braided layer, and a sheath layer from the inside out," and "the inner lining layer is vulcanized acrylic rubber, the braided layer is aramid fiber or polyimide fiber, and the sheath layer is vulcanized fluororubber," achieving new technical effects: solving the technical problems of poor mechanical properties, poor high / low temperature resistance, and poor oil / chemical solvent resistance of existing conveying sleeves. The combined technical effect is superior to the sum of the effects of each individual technical means. Attached Figure Description

[0076] Figure 1 This is a cross-sectional structural diagram of the outer rubber and inner fiber sheath.

[0077] Among them, 1: inner lining layer; 2: braided layer; 3: sheath layer. Detailed Implementation

[0078] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0079] The present invention will be further described below by way of specific embodiments. All instruments, devices, equipment, reagents, products, etc., used in the embodiments of the present invention were obtained through conventional commercial channels unless otherwise specified. Specifically, the binary fluororubber, specification FE2603 or FE2604, was purchased from Shanghai Huayi Sanai Fu New Materials Co., Ltd.; the ternary fluororubber, specification 246, was purchased from Shandong Dongyue Polymer Materials Co., Ltd.; and the commercially available fiberglass sleeve, specification φ2.0, was purchased from Shenzhen Huachuangwei Industrial Co., Ltd.

[0080] Example 1 A type of refrigerant delivery sleeve with an outer rubber and inner fiber, such as Figure 1 As shown, it consists of an inner lining layer 1, a braided layer 2, and a sheath layer 3 from the inside out.

[0081] The preparation method of the above-mentioned outer rubber and inner fiber condenser delivery sleeve is as follows: (1) Preparation of inner lining: First, ethylene acrylate rubber AEM, silica, barium sulfate, antioxidant 405, stearic acid, pigment, bis(2,4) vulcanizing agent and accelerator are mixed in a mixing machine at a weight ratio of 100:40:10:1:2:3:1:1 and vulcanized in a cold extruder and tunnel furnace to obtain vulcanized acrylate rubber, i.e. inner lining; (2) Preparation of braided layer: The outer side of the inner lining layer is then braided using aramid fiber 1313 in a plain weave pattern on a braiding machine to obtain the braided layer; (3) Preparation of the sheath layer: Finally, binary fluororubber is used to modify and mix the outer side of the braided layer. The modification and mixing process is as follows: binary fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, color powder, bisphenol AF and benzyl triphenyl chloride are placed in a mixing machine in a weight ratio of 100:5:30:3:1:2:1:1 and mixed. The mixture is then vulcanized in a cold extruder and a tunnel furnace to obtain the final product.

[0082] Example 2 A type of refrigerant delivery sleeve with an outer rubber and inner fiber, such as Figure 1 As shown, it consists of an inner lining layer 1, a braided layer 2, and a sheath layer 3 from the inside out.

[0083] The preparation method of the above-mentioned outer rubber and inner fiber condenser delivery sleeve is as follows: (1) Preparation of inner lining: First, acrylic rubber ACM, silica, barium sulfate, antioxidant 445, stearic acid, pigment, bis(2,5) vulcanizing agent and accelerator are mixed in a weight ratio of 100:45:15:2:0.5:1:2:0.5 in a mixing machine and then vulcanized in a cold extruder and tunnel furnace to obtain vulcanized acrylic rubber, i.e. inner lining; (2) Preparation of braided layer: The outer side of the inner lining layer is then braided using aramid fiber 1414 in a plain weave pattern on a braiding machine to obtain the braided layer; (3) Preparation of the sheath layer: Finally, ternary fluororubber is used to modify and mix the outer side of the braided layer. The modification and mixing process is as follows: ternary fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, color powder, bisphenol AF and benzyl triphenyl chloride are placed in a mixing machine in a weight ratio of 100:10:20:5:2:3:2:0.5 and mixed. The mixture is then vulcanized in a cold extruder and a tunnel furnace to obtain the final product.

[0084] Example 3 A type of refrigerant delivery sleeve with an outer rubber and inner fiber, such as Figure 1 As shown, it consists of an inner lining layer 1, a braided layer 2, and a sheath layer 3 from the inside out.

[0085] The preparation method of the above-mentioned outer rubber and inner fiber condenser delivery sleeve is as follows: (1) Preparation of inner lining: First, ethylene acrylate rubber AEM, acrylate rubber ACM, silica, barium sulfate, antioxidant 405, stearic acid, pigment, bis(2,4) vulcanizing agent and accelerator are mixed in a weight ratio of 50:50:60:5:0.5:3:5:0.5:0.5 in a mixer and then vulcanized in a cold extruder and tunnel furnace to obtain vulcanized acrylate rubber, i.e., inner lining; (2) Preparation of braided layer: The outer side of the inner lining layer is then braided with aramid fiber 1414 in a twill pattern using a braiding machine to obtain the braided layer; (3) Preparation of the sheath layer: Finally, fluorosilicone rubber is used to modify and mix the outer side of the braided layer. The modification and mixing process is as follows: fluorosilicone rubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, color powder, bisphenol AF and benzyltriphenyl chloride are mixed in a weight ratio of 100:1:60:1:0.5:1:0.5:2 in a mixing machine and then vulcanized in a cold extruder and tunnel furnace to obtain the final product.

[0086] Example 4 A type of refrigerant delivery sleeve with an outer rubber and inner fiber, such as Figure 1 As shown, it consists of an inner lining layer 1, a braided layer 2, and a sheath layer 3 from the inside out.

[0087] The preparation method of the above-mentioned outer rubber and inner fiber condenser delivery sleeve is as follows: (1) Preparation of inner lining: First, ethylene acrylate rubber AEM, acrylate rubber ACM, silica, barium sulfate, antioxidant dinitrophenol, stearic acid, pigment, bis(2,5) vulcanizing agent and accelerator are mixed in a mixing mill at a weight ratio of 70:30:20:8:1:1:2:0.5:2 and vulcanized in a cold extruder and tunnel furnace to obtain vulcanized acrylate rubber, i.e. inner lining; (2) Preparation of braided layer: The outer side of the inner lining layer is then braided with aramid fiber 1414 in a twill pattern using a braiding machine to obtain the braided layer; (3) Preparation of the sheath layer: Finally, perfluoroether rubber is used to modify and mix the outer side of the braided layer. The modification and mixing process is as follows: perfluoroether rubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, color powder, bisphenol AF and benzyltriphenyl chloride are placed in a mixing machine in a weight ratio of 100:8:40:4:1.5:2:1:1.5 and then vulcanized in a cold extruder and tunnel furnace to obtain the final product.

[0088] Comparative Example 1 Compared with Example 1, the only difference is the ratio of raw materials.

[0089] A type of refrigerant delivery sleeve with an outer rubber and inner fiber, such as Figure 1 As shown, it consists of an inner lining layer 1, a braided layer 2, and a sheath layer 3 from the inside out.

[0090] The preparation method of the above-mentioned outer rubber and inner fiber condenser delivery sleeve is as follows: (1) Preparation of inner lining: First, ethylene acrylate rubber AEM, silica, barium sulfate, antioxidant 405, stearic acid, pigment, bis(2,4) vulcanizing agent and accelerator are mixed in a mixing machine at a weight ratio of 100:70:3:4:5:0.5:3:0.3 and then vulcanized in a cold extruder and tunnel furnace to obtain vulcanized acrylate rubber, i.e. inner lining; (2) Preparation of braided layer: The outer side of the inner lining layer is then braided using aramid fiber 1313 in a plain weave pattern on a braiding machine to obtain the braided layer; (3) Preparation of the sheath layer: Finally, binary fluororubber is used to modify and mix the outer side of the braided layer. The modification and mixing process is as follows: binary fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, color powder, bisphenol AF and benzyl triphenyl chloride are mixed in a weight ratio of 100:15:70:0.5:4:5:4:0.2 in a mixing machine and then vulcanized in a cold extruder and tunnel furnace to obtain the final product.

[0091] Detection example The physical properties of the outer rubber and inner fiber condenser delivery sleeves prepared in Examples 1-4 and Comparative Example 1 were tested respectively. The test methods were in accordance with ASTM D2671-21 and EN60684-2:2011.

[0092] Verification of technical effectiveness and / or analysis of solutions to technical problems: The test results are shown in Table 1. It can be seen that the performance of the example is better than that of the comparative example and conventional fiberglass tube.

[0093] Table 1 Physical performance test results

[0094] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A refrigerant delivery sleeve with an outer rubber and inner fiber, characterized in that, It consists of an inner liner, a braided layer, and a sheath layer from the inside out. The inner liner is made of vulcanized acrylic rubber, the braided layer is made of aramid fiber or polyimide fiber, and the sheath layer is made of vulcanized fluororubber.

2. The outer rubber and inner fiber condensate conveying sleeve according to claim 1, characterized in that, The acrylate rubber includes one or both of ethylene acrylate rubber AEM and acrylate rubber ACM.

3. The outer rubber and inner fiber condensate conveying sleeve according to claim 1, characterized in that, The aramid fiber is aramid fiber 1313 or aramid fiber 1414, and the polyimide fiber is polyetherimide.

4. The outer rubber and inner fiber condensate conveying sleeve according to claim 1, characterized in that, The fluororubber includes one or more of binary fluororubber, ternary fluororubber, fluorosilicone rubber, and perfluoroether rubber.

5. A method for manufacturing a condenser delivery sleeve with an outer rubber and inner fiber as described in any one of claims 1-4, characterized in that, Includes the following steps: (1) The inner lining is obtained by first modifying and mixing acrylic rubber and then vulcanizing it; (2) Then, the outer side of the inner lining layer is woven with aramid fiber or polyimide fiber to obtain a woven layer; (3) Finally, fluororubber is used to modify and mix the outer side of the braided layer, and vulcanization is performed to obtain the final product.

6. The manufacturing method according to claim 5, characterized in that, The modified compounding process in step (1) includes: compounding acrylate rubber, silica, barium sulfate, antioxidant, stearic acid and color powder; the vulcanization is carried out by extrusion and vulcanization using vulcanizing agent and accelerator.

7. The manufacturing method according to claim 6, characterized in that, The antioxidant is selected from one or more of antioxidant 405, antioxidant 445, and dinitrophenol; the vulcanizing agent is selected from one or two of bis(2,4)-dimethylisocyanurate and bis(2,5)-dimethylisocyanurate; the accelerator is triallyl isocyanurate; the weight ratio of the acrylate rubber, silica, barium sulfate, antioxidant, stearic acid, pigment, vulcanizing agent, and accelerator is 100:20-60:5-15:0.5-2:0.5-3:1-5:0.5-2:0.5-2.

8. The manufacturing method according to claim 5, characterized in that, The weaving method described in step (2) is either plain weave or twill weave.

9. The manufacturing method according to claim 5, characterized in that, The modified compounding process in step (3) includes: compounding fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax and color powder; the vulcanization is carried out by extrusion and vulcanization using bisphenol AF and benzyltriphenylphosphine chloride.

10. The manufacturing method according to claim 9, characterized in that, The weight ratio of the fluororubber, zinc oxide, barium sulfate, calcium oxide, carnauba wax, pigment, bisphenol AF and benzyltriphenyl chloride is 100:1-10:20-60:1-5:0.5-2:1-3:0.5-2:0.5-2.

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