A peristaltic pump tube and its preparation method

Abstract

This application relates to the technical field of organosilicon polymer materials, and particularly relates to a peristaltic pump tube and a preparation method thereof. The peristaltic pump tube comprises the following raw materials in parts by weight: 0-30 parts of 1# methyl vinyl silicone rubber, 45-55 parts of 2# methyl vinyl silicone rubber, 8-12 parts of 3# methyl vinyl silicone rubber, 15-50 parts of 4# methyl vinyl silicone rubber, 30-40 parts of fumed silica, 3-5 parts of hydroxyl silicone oil, 0.5-1 part of hydrogen-containing silicone oil, 0.6-0.8 part of platinum vulcanizing agent A, and 0.8-1.2 part of platinum vulcanizing agent B; it has the advantage of improving the service life of the silicone rubber peristaltic pump tube.

Description

Technical Field

[0001] This application relates to the technical field of silicone polymer materials, and particularly relates to a peristaltic pump tube and a preparation method thereof. Background Art

[0002] The peristaltic pump hose is an important accessory of the peristaltic pump, mainly used in the food and medical industries, specifically for fluid transportation of the peristaltic pump, inspection and analysis of chemicals, drug production transportation and sampling, and food and beverage transportation. The existing materials of peristaltic pump tubes mainly include rubber, plastic, synthetic materials, silicone rubber, etc. However, rubber has insufficient heat resistance and is prone to aging, and is not suitable for high-temperature and long-term use; plastics and synthetic materials have poor elasticity, high exudates, short service life, and can only be applied to industries with lower requirements other than food and medical; while silicone rubber has excellent weather resistance, heat resistance and biocompatibility, making the usage amount of peristaltic pump tubes made of silicone rubber gradually increase.

[0003] However, the abrasion resistance of silicone rubber is insufficient, so that during the use of the tube, due to the extrusion of the peristaltic pump, the inner wall of the tube is frictionally damaged, and the worn silicone particles are precipitated, polluting the fluid, resulting in a short service life of the tube, high replacement frequency during use, increased production costs, and reduced production efficiency. Summary of the Invention

[0004] In order to improve the service life of silicone rubber peristaltic pump tubes, this application provides a peristaltic pump tube and a preparation method thereof.

[0005] In a first aspect, this application provides a peristaltic pump tube, adopting the following technical solution:

[0006] A peristaltic pump tube, which comprises the following raw materials in parts by weight: 0-30 parts of 1# methyl vinyl silicone rubber, 45-55 parts of 2# methyl vinyl silicone rubber, 8-12 parts of 3# methyl vinyl silicone rubber, 15-50 parts of 4# methyl vinyl silicone rubber, 30-40 parts of fumed silica, 3-5 parts of hydroxyl silicone oil, 0.5-1 part of hydrogen-containing silicone oil, 0.6-0.8 part of platinum vulcanizing agent A and 0.8-1.2 part of platinum vulcanizing agent B; the platinum vulcanizing agent A is a platinum complex, and the platinum vulcanizing agent B is a mixture of hydrogen-containing silicone oil and an inhibitor;

[0007] Among them, the molar content of vinyl in 1# methyl vinyl silicone rubber is 0.19-0.24%, and the molecular weight is 600,000; the molar content of vinyl in 2# methyl vinyl silicone rubber is 0.13-0.18%, and the molecular weight is 600,000; the molar content of vinyl in 3# methyl vinyl silicone rubber is 4.96-5.04%, and the molecular weight is 600,000; the molar content of vinyl in 4# methyl vinyl silicone rubber is 0.03-0.04%, and the molecular weight is 1.1 million.

[0008] By adopting the above technical solution, by compounding vinyl silicone rubbers with different vinyl contents and different molecular weights, the crosslinking density inside the silicone rubber system can be increased, the service stability of the peristaltic pump tube can be improved, and the service life of the peristaltic pump tube can be effectively increased.

[0009] Preferably, it comprises the following raw materials in parts by weight: 25 parts of 1# methyl vinyl silicone rubber, 50 parts of 2# methyl vinyl silicone rubber, 10 parts of 3# methyl vinyl silicone rubber, 15 parts of 4# methyl vinyl silicone rubber, 30 parts of fumed silica, 5 parts of hydroxyl silicone oil, 1 part of hydrogen-containing silicone oil, 0.6 part of platinum vulcanizing agent A, and 1.2 parts of platinum vulcanizing agent B.

[0010] By adopting the above technical solution, by optimizing the ratio of each raw material, the life of the peristaltic pump tube can be further increased, and its life can reach 610 h, which is more than 3 times that of the peristaltic pump tubes on the market.

[0011] Preferably, the fumed silica is modified fumed silica, and the modified fumed silica is prepared by reacting fumed silica with a silane coupling agent containing double bonds.

[0012] By adopting the above technical solution, by surface-modifying the fumed silica so that its surface contains double bonds, it can participate in the crosslinking reaction of the silicone rubber, thereby improving the compatibility between the fumed silica and the system and the crosslinking degree of the silicone rubber, thus greatly improving the stability of the peristaltic pump tube, significantly increasing its service life, and also improving its mechanical strength.

[0013] Preferably, the fumed silica is modified fumed silica, and the preparation method of the modified fumed silica is as follows:

[0014] S1. Using an ethanol aqueous solution as a solvent, adding 4 - 6 parts by weight of fumed silica and 8 - 12 parts by weight of amino silane coupling agent, heating to 70 - 85 °C, and stirring and reacting for 20 - 28 h to obtain fumed silica grafted with silane coupling agent;

[0015] S2. Adding the fumed silica grafted with silane coupling agent obtained in S1 into DMF, then adding 55 - 65 parts by weight of carboxyl-terminated hyperbranched polyester, 0.6 - 1.0 part by weight of 4-dimethylaminopyridine, and 0.6 - 1.0 part by weight of N,N'-dicyclohexylcarbodiimide, raising the temperature to 90 - 100 °C, stirring and reacting for 20 - 26 h, and then continuously adding 30 - 45 parts by weight of amino acrylate, stirring and reacting for 13 - 24 h to obtain modified fumed silica.

[0016] By adopting the above technical solution, a silane coupling agent is grafted onto the surface of fumed silica, and then the amino group on the silane coupling agent is connected to the terminal carboxyl hyperbranched polyester through an amide reaction, and then reacted with an amino acrylate, so that the gas phase surface contains more double bonds. By grafting hyperbranched polyester onto fumed silica and then obtaining double bonds at the end of its branched chain, the interfacial tension between fumed silica and the silicone rubber system can be greatly reduced, making it have extremely high compatibility with the system. Moreover, as a hyperbranched molecule, hyperbranched polyester has extremely low viscosity, which can not only increase the distance between fumed silica particles and improve its dispersibility, but also increase the content of double bonds on its surface, making it act as a crosslinking center in the silicone rubber, greatly improving the crosslinking degree of the silicone rubber, and further improving the service life and physical properties of the peristaltic pump tube.

[0017] Preferably, the amino silane coupling agent is one or more of aminopropyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, 3-aminopropyltrimethoxysilane, and anilinomethyltriethoxysilane.

[0018] By adopting the above technical solution, although the embodiments do not explore each of them one by one, theoretically, the technical effects of this application can be obtained.

[0019] Preferably, the average molecular weight of the terminal carboxyl hyperbranched polyester ≤ 6400.

[0020] By adopting the above technical solution, the molecular weight of the terminal carboxyl hyperbranched polyester should not be too large. If the molecular weight is too large, it is easy for multiple fumed silica particles to react with the same terminal carboxyl hyperbranched polyester, resulting in the agglomeration of fumed silica.

[0021] Preferably, the specific surface area of the fumed silica is 200 - 300m 2 / g.

[0022] In the second aspect, this application provides a preparation method of a peristaltic pump tube, adopting the following technical solution:

[0023] A preparation method of a peristaltic pump tube, which includes the following steps:

[0024] S1. In a vacuum kneader, add 1# methyl vinyl silicone rubber, 2# methyl vinyl silicone rubber, 3# methyl vinyl silicone rubber, 4# methyl vinyl silicone rubber, hydroxyl silicone oil and hydrogen-containing silicone oil, and mix them evenly in the kneader;

[0025] S2. Continuously add fumed silica or modified fumed silica in multiple batches. After adding, stir and knead at a temperature of 65 - 75 °C to form a mass. After forming the mass, continue to knead for 10 - 30 min to obtain a rubber compound;

[0026] S3. Heat the rubber compound obtained in S2 to 110 - 130 °C, carry out internal mixing under vacuum for 0.5 - 1.5 h, cool and store to obtain the primary mixed rubber, and carry out secondary internal mixing under the same conditions to obtain the secondary mixed rubber;

[0027] S4. Knead the secondary mixed rubber and platinum vulcanizing agent B evenly in an open mill, then knead it with platinum vulcanizing agent A evenly in an open mill, then vulcanize at 160 - 170 °C for 10 - 20 min, and then vulcanize at 190 - 210 °C for 1.5 - 2.5 h, and extrude through an extruder to obtain the peristaltic pump tube.

[0028] By adopting the above technical solution, the preparation method of the present application is relatively conventional, has a high tolerance for process parameters, and the qualified rate of the prepared peristaltic pump tubes is 98% or above, which is suitable for large-scale production in factories.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By compounding vinyl silicone rubbers with different vinyl contents and different molecular weights, the crosslinking density inside the silicone rubber system can be increased, the use stability of the peristaltic pump tube can be improved, and the service life of the peristaltic pump tube can be effectively increased.

[0031] 2. By grafting hyperbranched polyester onto fumed silica and then reacting to obtain double bonds at the end of its branches, the interfacial tension between the fumed silica and the silicone rubber system can be greatly reduced, making it have extremely high compatibility with the system. Moreover, as a hyperbranched molecule, hyperbranched polyester has an extremely low viscosity, which can increase the distance between fumed silica particles, improve its dispersibility, and also increase the content of double bonds on its surface, enabling it to act as a crosslinking center within the silicone rubber, greatly increasing the crosslinking degree of the silicone rubber, and further improving the service life and physical properties of the peristaltic pump tube.

[0032] 3. In the physical property tests of the peristaltic pump tubes prepared in the present application, the hardness is between 54 - 69 Shore A; the tensile strength is between 6.3 - 12.0 MPa; the elongation at break is between 214 - 407%; the tear strength is between 21.2 - 45.8 kN / m; at the same time, the rebound rate can reach 62 - 78%; the flow rate retention rate performs well, the service life is above 410 h, and the maximum can reach 681 h. And during the test process, no broken particles of the pipe material are found in the peristaltic pump tubes prepared in the present application; it shows that the peristaltic pump tubes prepared in the present application have excellent physical properties, and greatly improve the service life, flow rate retention rate, and safety of the silicone rubber peristaltic pump tubes. Detailed Embodiments

[0033] The following further elaborates on the present application in combination with specific content.

[0034] All raw materials used in the preparation examples and examples of this application were purchased commercially. Among them, the platinum vulcanizing agent is a two-component silicone rubber platinum vulcanizing agent, including platinum vulcanizing agent A and platinum vulcanizing agent B, with the model PC-100. Platinum vulcanizing agent A is a platinum complex, specifically divinyltetramethyldisiloxane platinum complex, and the effective substance content is ≥99.0%; the effective substances of platinum vulcanizing agent B are hydrogen-containing silicone oil and inhibitor, and the effective substance content is ≥98%. The weight ratio of hydrogen-containing silicone oil to inhibitor is 7:3. Among them, the hydrogen-containing silicone oil has a viscosity of 20 mm 2 / s and a hydrogen content of 1.4 - 1.55%; the inhibitor is triacetyl phosphonic acid, purchased from Ningbo Zhenhai Weiqi Rubber and Plastic Technology Co., Ltd., and is a customized product; the fumed silica has a specific surface area of 200 - 300 m 2 / g. The specific surface area of the fumed silica used in the examples of this application is 200 m 2 / g; the hydroxy silicone oil has a viscosity of 29.8 mm 2 / S and a hydroxy content of 6 - 9%; the hydrogen-containing silicone oil has a viscosity of 24 mm 2 / S and a hydrogen content of 1.55 - 1.65%.

[0035] Preparation Example 1

[0036] A modified fumed silica, and its preparation method is as follows:

[0037] S1. Add 5 g of fumed silica and 10 g of aminopropyltriethoxysilane to 100 g of an ethanol aqueous solution, which is a mixed solution of ethanol and water with a volume ratio of 1:1. Heat to 75°C, stir and react for 24 h, filter, wash, and dry to obtain fumed silica grafted with silane coupling agent;

[0038] S2. Add the fumed silica grafted with silane coupling agent obtained in S1 to 200 mL of DMF, then stir and disperse, add 60 g of carboxyl-terminated hyperbranched polyester, 0.8 g of 4-dimethylaminopyridine (DMAP), and 0.8 g of N,N'-dicyclohexylcarbodiimide (DCC). The model of the carboxyl-terminated hyperbranched polyester is HyPer C101, with a molecular weight of 2600 and 12 carboxyl groups / mol. Heat to 95°C, stir and react for 24 h, then continue to add 40 g of methyl acrylate amine, stir and react for 15 h, filter, wash, and dry to obtain the modified fumed silica.

[0039] Preparation Example 2

[0040] A modified fumed silica, and its preparation method is as follows:

[0041] 5 g of fumed silica and 10 g of vinyltriethoxysilane were added to 100 g of an ethanol aqueous solution, which was a mixed solution of ethanol and water with a volume ratio of 1:1. The mixture was heated to 75 °C and stirred for reaction for 24 h, followed by filtration, washing, and drying to obtain modified fumed silica.

[0042] Example

[0043] Examples 1-4

[0044] A peristaltic pump tube, the raw materials and their dosages are shown in Table 1, and its preparation method is as follows:

[0045] S1. According to the dosages in Table 1, in a vacuum kneader, add 1# methyl vinyl silicone rubber, 2# methyl vinyl silicone rubber, 3# methyl vinyl silicone rubber, 4# methyl vinyl silicone rubber, hydroxy silicone oil, and hydrogen-containing silicone oil, and mix them evenly in the kneader; among them, the molar content of vinyl in 1# methyl vinyl silicone rubber is 0.19-0.24%, and the molecular weight is 600,000; the molar content of vinyl in 2# methyl vinyl silicone rubber is 0.13-0.18%, and the molecular weight is 600,000; the molar content of vinyl in 3# methyl vinyl silicone rubber is 4.96-5.04%, and the molecular weight is 600,000; the molar content of vinyl in 4# methyl vinyl silicone rubber is 0.03-0.04%, and the molecular weight is 1,100,000;

[0046] S2. Continuously add fumed silica. The fumed silica is added in four times, and the addition amounts are 25%, 25%, 25%, and 25% in sequence by mass. After the addition is completed, under normal pressure and at a temperature of 70 °C, stir and knead to form a mass. After forming, continue to knead for 20 min to obtain a rubber compound;

[0047] S3. Heat the rubber compound obtained in S2 to 120 °C, and carry out internal mixing for 1 h under a vacuum degree of -0.9 MPa, and then cool and store for 24 h to obtain a primary mixed rubber;

[0048] S4. Heat the primary mixed rubber to 110 °C, and carry out internal mixing for 1 h under a vacuum degree of -0.9 MPa, and then cool naturally to obtain a secondary mixed rubber;

[0049] S5. Knead the secondary mixed rubber and platinum vulcanizing agent B evenly on an open mill, and then knead it evenly with platinum vulcanizing agent A on an open mill. First, vulcanize at 165 °C for 15 min, then vulcanize at 200 °C for 2 h, and then extrude through an extruder. The extruded peristaltic pump tube is No. 17, with an inner diameter of 6.4 mm, an outer diameter of 9.6 mm, and a wall thickness of 1.6 mm; the extrusion temperature is 600 °C in the first stage, 300 °C in the second stage, and 200 °C in the third stage; the peristaltic pump tube is then subjected to secondary vulcanization at 150 °C for 2 h to obtain an ultra-long-life silicone peristaltic pump tube.

[0050] Table 1 Raw materials and their dosages (kg) in Examples 1-4

[0051]

[0052] Example 5

[0053] A peristaltic pump tube, which is different from that of Example 1 in that its fumed silica is replaced with an equal mass of modified fumed silica, and the modified fumed silica comes from Preparation Example 1, and the remaining steps are the same as those of Example 1.

[0054] Example 6

[0055] A peristaltic pump tube, which is different from that of Example 1 in that its fumed silica is replaced with an equal mass of modified fumed silica, and the modified fumed silica comes from Preparation Example 2, and the remaining steps are the same as those of Example 1.

[0056] Example 7

[0057] A peristaltic pump tube, which is different from that of Example 5 in that the addition amount of the modified fumed silica is 32.5 kg, and the remaining steps are the same as those of Example 5.

[0058] Example 8

[0059] A peristaltic pump tube, which is different from that of Example 5 in that the addition amount of the modified fumed silica is 35 kg, and the remaining steps are the same as those of Example 5.

[0060] Comparative Example 1

[0061] A peristaltic pump tube, which is different from that of Example 1 in that its 2# vinyl silicone rubber, 3# vinyl silicone rubber and 4# vinyl silicone rubber are all replaced with an equal mass of 1# vinyl silicone rubber, and the remaining steps are the same as those of Example 1.

[0062] Comparative Example 2

[0063] A peristaltic pump tube, which is different from that of Example 1 in that its 1# vinyl silicone rubber, 3# vinyl silicone rubber and 4# vinyl silicone rubber are all replaced with an equal mass of 2# vinyl silicone rubber, and the remaining steps are the same as those of Example 1.

[0064] Comparative Example 3

[0065] A peristaltic pump tube, which is different from that of Example 1 in that its 1# vinyl silicone rubber, 2# vinyl silicone rubber and 4# vinyl silicone rubber are all replaced with an equal mass of 3# vinyl silicone rubber, and the remaining steps are the same as those of Example 1.

[0066] Comparative Example 4

[0067] A peristaltic pump tube, which is different from that of Example 1 in that its #1 vinyl silicone rubber, #2 vinyl silicone rubber, and #3 vinyl silicone rubber are all replaced with the same mass of #4 vinyl silicone rubber, and the remaining steps are the same as those of Example 1.

[0068] Prepare peristaltic pump tubes according to the preparation methods in Examples 1-8 and Comparative Examples 1-4 respectively, and then detect them. The detection results are shown in Tables 2 and 3.

[0069] Among them, the test equipment used for detecting the flow rate retention rate of the peristaltic pump tube is a Longer peristaltic pump WT600-2J, and the pump head is YZ1515x; test conditions: continuously pump water at a rotation speed of 600 rpm / min, temperature 23±2°C; test solution: clear water; measure until the peristaltic pump tube is damaged and leaks, and use this as the judgment basis for the life of the peristaltic pump tube. During the test of the rubber tube, the test is carried out in a clear water tank. During the test, the worn particles of the rubber tube will flow into the clear water and will be observed. The judgment method for the precipitated particulate matter is visual inspection.

[0070] Tensile strength and elongation at break: Refer to GBT 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber;

[0071] Hardness: Refer to GBT 531.1-2008 Test method for indentation hardness of vulcanized rubber or thermoplastic rubber - Part 1: Shore hardness;

[0072] Tear strength: Refer to GBT 529-2008 Determination of tear strength of vulcanized rubber or thermoplastic rubber (trouser, right-angle and crescent specimens);

[0073] Rebound resilience: Refer to GBT 1681-2009 Determination of resilience of vulcanized rubber.

[0074] Table 2 Physical property test results of Examples 1-8

[0075]

[0076] Table 3 Flow rate retention rates of Examples 1-8 and Comparative Examples 1-4

[0077]

[0078] From the test data of Examples 1-8 and Comparative Examples 1-4, as well as Tables 2 and 3, it can be seen that in the physical property tests of the peristaltic pump tubes prepared in this application, the hardness is between 54-69 Shore A; the tensile strength is between 6.3-12.0 MPa; the elongation at break is between 214-407%; the tear strength is between 21.2-45.8 kN / m; at the same time, the rebound rate can reach 62-78%; the flow rate retention rate performs well, and their service life (damage time) is above 410 h, up to 681 h at most. And during the test process, no broken particles of the pipe material were found in the peristaltic pump tubes prepared in this application. It shows that the peristaltic pump tubes prepared in this application have excellent physical properties, and greatly improve the service life, flow rate retention rate and safety of the silicone rubber peristaltic pump tubes.

[0079] From the test data of Examples 1-4 and Comparative Examples 1-4, it can be seen that by compounding vinyl silicone rubbers with different vinyl contents and different molecular weights, the service life of the peristaltic pump tube can be effectively improved. On this basis, combined with Examples 5-6, by surface-modifying the fumed silica so that its surface contains double bonds, it can participate in the cross-linking reaction of the silicone rubber, thereby improving the compatibility between the fumed silica and the system and the cross-linking degree of the silicone rubber, thus greatly improving the stability of the peristaltic pump tube, making its service life greatly improved, and the mechanical strength is also improved.

[0080] Moreover, by grafting hyperbranched polyester onto the fumed silica and then reacting to obtain double bonds at the end of its branches, the interfacial tension between the fumed silica and the silicone rubber system can be greatly reduced, making it have extremely high compatibility with the system. And, as a hyperbranched molecule, the viscosity of hyperbranched polyester is extremely low. It can increase the distance between the fumed silica particles, improve its dispersibility, and also increase the content of double bonds on its surface, making it a cross-linking center in the silicone rubber and greatly improving the cross-linking degree of the silicone rubber. Overall, the modified fumed silica prepared in Preparation Example 1 can further improve the service life and physical properties of the peristaltic pump tube.

[0081] From the test data of Example 5 and Examples 7-8, it can be seen that when the addition amount of the modified fumed silica is 32.5 kg, the economic benefit of its peristaltic pump tube is higher, and its service life and mechanical properties perform better.

[0082] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A peristaltic pump tube, characterized in that: The invention comprises the following raw materials in parts by weight: 0-30 parts of 1# methyl vinyl silica gel, 45-55 parts of 2# methyl vinyl silica gel, 8-12 parts of 3# methyl vinyl silica gel, 15-50 parts of 4# methyl vinyl silica gel, 30-40 parts of fumed silica, 3-5 parts of hydroxy silicone oil, 0.5-1 part of hydrogen-containing silicone oil, 0.6-0.8 parts of platinum vulcanizing agent A and 0.8-1.2 parts of platinum vulcanizing agent B; the platinum vulcanizing agent A is a platinum complex, and the platinum vulcanizing agent B is a mixture of hydrogen-containing silicone oil and an inhibitor; Among them, the molar content of vinyl in 1# methyl vinyl silica gel is 0.19-0.24%, and the molecular weight is 600,000; the molar content of vinyl in 2# methyl vinyl silica gel is 0.13-0.18%, and the molecular weight is 600,000; the molar content of vinyl in 3# methyl vinyl silica gel is 4.96-5.04%, and the molecular weight is 600,000; the molar content of vinyl in 4# methyl vinyl silica gel is 0.03-0.04%, and the molecular weight is 1.1 million; The fumed silica is modified fumed silica, and the preparation method of the modified fumed silica is as follows: S1, using ethanol aqueous solution as solvent, adding 4-6 parts by weight of fumed silica and 8-12 parts by weight of aminosilane coupling agent, heating to 70-85° C., stirring and reacting for 20-28 hours, to obtain fumed silica grafted silane coupling agent; S2. Add the fumed silica grafted silane coupling agent of S1 into DMF, then add 55-65 parts by weight of terminal carboxyl hyperbranched polyester, 0.6-1.0 parts by weight of 4-dimethylaminopyridine and 0.6-1.0 parts by weight of N,N-dicyclohexylcarbodiimide, raise the temperature to 90-100°C, stir and react for 20-26 hours, then continue to add 30-45 parts by weight of amino acrylate, stir and react for 13-24 hours to obtain modified fumed silica.

2. A peristaltic pump tube according to claim 1, characterized in that: It includes the following raw materials in parts by weight: 25 parts of 1# methyl vinyl silicone, 50 parts of 2# methyl vinyl silicone, 10 parts of 3# methyl vinyl silicone, 15 parts of 4# methyl vinyl silicone, 30 parts of fumed silica, 5 parts of hydroxy silicone oil, 1 part of hydrogen-containing silicone oil, 0.6 parts of platinum vulcanizer A and 1.2 parts of platinum vulcanizer B.

3. A peristaltic pump tube according to claim 1, characterized in that: The aminosilane coupling agent is one or more of aminopropyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, 3-aminopropyltrimethoxysilane, and anilinemethyltriethoxysilane.

4. A peristaltic pump tube according to claim 1, characterized in that: The average molecular weight of the carboxyl-terminated hyperbranched polyester is ≤6400.

5. A peristaltic pump tube according to claim 1, characterized in that: The specific surface area of ​​the fumed silica is 200-300m 2 / g.

6. A method for preparing a peristaltic pump tube according to any one of claims 1 to 5, characterized in that: It includes the following steps: S1. Add 1# methyl vinyl silica gel, 2# methyl vinyl silica gel, 3# methyl vinyl silica gel, 4# methyl vinyl silica gel, hydroxy silicone oil and hydrogen-containing silicone oil into a vacuum kneader and mix them evenly in the kneader; S2, continue to add fumed silica in several times, after adding, stir and knead at a temperature of 65-75 ° C to form a mass, and continue to knead for 10-30 minutes after forming a mass to obtain a rubber material; S3, heating the rubber obtained in S2 to 110-130°C, mixing under vacuum for 0.5-1.5h, cooling and allowing to stand to obtain a primary mixed rubber, and performing secondary mixing under the same conditions to obtain a secondary mixed rubber; S4. The secondary mixed rubber and platinum vulcanizer B are evenly mixed in an open mill, and then mixed with platinum vulcanizer A in an open mill, and then vulcanized at 160-170°C for 10-20min, and then vulcanized at 190-210°C for 1.5-2.5h, and extruded through an extruder to obtain a peristaltic pump tube.

Images