A fluorosilicone rubber cloth sandwiched diaphragm

Abstract

The application discloses a fluorosilicone rubber cloth sandwiched membrane, relates to the technical field of the cloth sandwiched membrane, and comprises a base cloth and a rubber layer on the surface of the base cloth, wherein the base cloth is consistent with the shape of the rubber layer, and the preparation method of the fluorosilicone rubber cloth sandwiched membrane comprises the following steps: S1, preparing the rubber layer; S2, preparing an adhesive treatment agent; S3, carrying out impregnation treatment on the base cloth; and S4, vulcanization forming. The fluorosilicone rubber cloth sandwiched membrane prepared by the application has the characteristics of high strength, tear resistance, fatigue resistance, chemical corrosion resistance and excellent high-temperature resistance. In addition, the cross-linking network structure formed by the component interaction of the adhesive treatment agent can ensure the adhesive strength of the base cloth and the rubber, and the adhesive treatment agent is non-toxic and has high adhesive strength, so that the fluorosilicone rubber cloth sandwiched membrane has good heat resistance and breaking strength.

Description

Technical Field

[0001] This invention relates to the field of fabric-reinforced diaphragm technology, specifically to a fluorosilicone rubber fabric-reinforced diaphragm. Background Technology

[0002] A fabric-reinforced rubber diaphragm is a thin sheet composed of rubber and fabric materials. Its manufacturing process generally requires bonding the rubber and fabric materials together to form a fabric-reinforced structure.

[0003] Fabric-reinforced rubber diaphragms combine the elasticity and abrasion resistance of rubber with the flexibility and abrasion resistance of fabric. Their primary use is as a sealing material, commonly found in seals of various mechanical equipment. They effectively prevent liquid or gas leakage, improving the sealing performance of equipment. They can also be used to make water-blocking plates, sound-insulating pads, etc., providing excellent waterproofing and sound insulation.

[0004] Most fabric-reinforced diaphragms on the market are made of nitrile rubber as the main material. In actual use, their oil resistance and high-temperature aging resistance are relatively low. Secondly, the bonding technology between the base fabric and the rubber generally adopts the RFL bonding system, which has strong adhesion but has toxicity issues. Therefore, this invention provides a fluorosilicone rubber fabric-reinforced diaphragm. In the manufacturing process, the fluorosilicone rubber layer and the base fabric (fabric layer) are bonded together. The base fabric provides reinforcement and support, while the fluorosilicone rubber layer endows it with chemical corrosion resistance and high-temperature resistance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a fluorosilicone rubber-reinforced fabric diaphragm, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fluorosilicone rubber-reinforced fabric membrane, comprising a base fabric and a rubber layer located on the surface of the base fabric, wherein the base fabric and the rubber layer have the same shape, and the preparation method of the fluorosilicone rubber-reinforced fabric membrane comprises the following steps:

[0007] S1. Prepare the rubber layer;

[0008] The raw materials of the rubber layer are composed of the following components by weight: 40-50 parts of fluorosilicone rubber, 1-3 parts of antioxidant, 6-8 parts of adhesive treatment agent, 8-10 parts of abrasion-resistant carbon black, 1.5-3 parts of vulcanizing agent, 10-15 parts of naphthenic oil, 5-10 parts of structure control agent, and 2-4 parts of flow aid.

[0009] S2. Preparation of adhesive treatment agent;

[0010] The raw materials of the adhesive treatment agent are composed of the following components by weight: 15-20 parts of vinyl acetate latex, 20-30 parts of carboxylated nitrile latex, 10-15 parts of water-soluble epoxy resin, 8-12 parts of polyvinyl chloride copolymer, and 5-8 parts of accelerator.

[0011] S3. Impregnate the base fabric with adhesive.

[0012] Immerse the base fabric in the adhesive treatment solution for 30-50 seconds, then remove and air dry for later use.

[0013] S4, vulcanization molding;

[0014] The soaked and dried base fabric and the rubber layer prepared in S1 are placed into a mold for vulcanization molding to obtain a fluorosilicone rubber-coated fabric film.

[0015] As a further technical solution of the present invention, the antioxidant is a mixture of active magnesium oxide and active calcium oxide, wherein the mass ratio of active magnesium oxide to active calcium oxide is 2:1.

[0016] As a further technical solution of the present invention, the vulcanizing agent is a peroxide or sulfur masterbatch particles.

[0017] As a further technical solution of the present invention, the structure control agent is hydroxyl fluorosilicone oil, and the flow aid is a paraffin-based flow aid.

[0018] As a further technical solution of the present invention, the vulcanization conditions in S4 are: temperature of 160±2℃, vulcanization pressure of 10±1Mpa, and vulcanization time of 5-15min.

[0019] As a further technical solution of the present invention, the method for preparing the rubber layer comprises the following steps:

[0020] A1. Add a certain weight of fluorosilicone rubber, antioxidant, abrasion-resistant carbon black, vulcanizing agent and naphthenic oil to a mixing equipment for preliminary mixing for 5-8 minutes and discharge temperature of 140-150℃ to obtain preliminary mixture.

[0021] A2. Then add a certain amount of adhesive, structure control agent and flow aid to the preliminary compound obtained above in sequence, and perform secondary mixing treatment on it using an internal mixer for 2-3 minutes at a temperature of 80-100℃. After mixing is completed, discharge the glue and sheet it at a temperature of 80-90℃, and then cool it to obtain the compound.

[0022] A3. After passing the obtained compound through a two-roll mill, the rubber layer is obtained by sheeting.

[0023] As a further technical solution of the present invention, the sheet thickness of the mixed rubber material in A3 after passing through the open mill is 0.1-0.15 mm.

[0024] As a further technical solution of the present invention, the preparation method of the adhesive treatment agent is as follows: a certain weight of vinyl acetate latex, carboxylated nitrile latex, water-soluble epoxy resin, polyvinyl chloride copolymer and accelerator are placed in a mixer and mixed uniformly for 20-30 minutes at 40-50°C at a mixing speed of 300-500 r / min. After uniform mixing, the adhesive treatment agent can be obtained.

[0025] As a further technical solution of the present invention, the accelerator is one or more of azole, guanidine, and sulfenamide accelerators.

[0026] As a further technical solution of the present invention, the polyvinyl chloride copolymer is an aqueous emulsion, and the average particle size of the polyvinyl chloride copolymer is 200-400 nm.

[0027] This invention provides a fluorosilicone rubber-reinforced fabric diaphragm. Compared with the prior art, it has the following advantages:

[0028] A fluorosilicone rubber-reinforced fabric diaphragm is prepared by using fluorosilicone rubber, antioxidants, abrasion-resistant carbon black, vulcanizing agents, naphthenic oils, adhesives, structure control agents, and flow aids. The interaction of these components ensures that the fluorosilicone rubber-reinforced fabric diaphragm has high strength while also exhibiting tear resistance and fatigue resistance. Furthermore, due to the properties of fluorosilicone rubber, the fabric diaphragm also possesses excellent chemical corrosion resistance and high-temperature resistance.

[0029] Secondly, after the base fabric is soaked in an adhesive treatment agent, the components of the adhesive treatment agent interact to form a cross-linked network structure, which can ensure the bonding strength between the base fabric and the rubber. Moreover, it is non-toxic and has high bonding strength, giving the fluorosilicone rubber-insulated film good heat resistance and tensile strength. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a fluorosilicone rubber-insulated fabric diaphragm.

[0031] In the diagram: 1. Rubber layer; 2. Base fabric. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 This invention provides a fluorosilicone rubber-lined membrane technical solution: a fluorosilicone rubber-lined membrane includes a base fabric and a rubber layer located on the surface of the base fabric. The base fabric and the rubber layer have the same shape and are substantially located between the two rubber layers. The preparation method of this fluorosilicone rubber-lined membrane includes the following steps:

[0034] S1. Prepare the rubber layer; and the method for preparing the rubber layer includes the following steps:

[0035] A1. Add a certain weight of fluorosilicone rubber, antioxidant, abrasion-resistant carbon black, vulcanizing agent and naphthenic oil to a mixing equipment for preliminary mixing for 5-8 minutes and discharge temperature of 140-150℃ to obtain preliminary mixture.

[0036] A2. Then add a certain amount of adhesive, structure control agent and flow aid to the preliminary compound obtained above in sequence, and perform secondary mixing treatment on it using an internal mixer for 2-3 minutes at a temperature of 80-100℃. After mixing is completed, discharge the glue and sheet it at a temperature of 80-90℃, and then cool it to obtain the compound.

[0037] A3. The obtained compound is then passed through a two-roll mill to produce a sheet, which has a sheet thickness of 0.1-0.15 mm.

[0038] Furthermore, the antioxidant is a mixture of active magnesium oxide and active calcium oxide, with a mass ratio of active magnesium oxide to active calcium oxide of 2:1;

[0039] The vulcanizing agent is a peroxide or sulfur masterbatch particles, the structure control agent is hydroxyl fluorosilicone oil, and the flow aid is a paraffin-based flow aid.

[0040] S2. Prepare the adhesive treatment agent, and the method for preparing the adhesive treatment agent is as follows:

[0041] A certain weight of vinyl acetate latex, carboxylated nitrile latex, water-soluble epoxy resin, polyvinyl chloride copolymer and accelerator are placed in a mixer and mixed evenly for 20-30 minutes at 40-50℃ and a mixing speed of 300-500 r / min. After the mixture is evenly mixed, the adhesive treatment agent can be obtained.

[0042] Furthermore, the accelerator is one or more of azole, guanidine, and sulfenamide accelerators;

[0043] The polyvinyl chloride copolymer is an aqueous emulsion, and the average particle size of the polyvinyl chloride copolymer is 200-400 nm.

[0044] S3. Impregnate the base fabric with adhesive.

[0045] Immerse the base fabric in the adhesive treatment solution for 30-50 seconds, then remove and air dry for later use.

[0046] S4, vulcanization molding;

[0047] The soaked and dried base fabric and the rubber layer prepared in S1 are placed into a mold for vulcanization. The vulcanization temperature is 160±2℃, the vulcanization pressure is 10±1Mpa, and the vulcanization time is 5-15min, which can produce a fluorosilicone rubber-coated fabric film.

[0048] Example 1

[0049] In this example, the raw materials of the rubber layer are composed of the following components by weight: 40 parts of fluorosilicone rubber, 1 part of antioxidant, 6 parts of adhesive treatment agent, 8 parts of abrasion-resistant carbon black, 1.5 parts of vulcanizing agent, 10 parts of naphthenic oil, 5 parts of structure control agent, and 2 parts of flow aid.

[0050] In this example, the raw materials of the adhesive treatment agent are composed of the following components by weight: 15 parts of vinyl acetate latex, 20 parts of carboxylated nitrile latex, 10 parts of water-soluble epoxy resin, 8 parts of polyvinyl chloride copolymer, and 5 parts of accelerator.

[0051] Example 2

[0052] In this example, the raw materials of the rubber layer are composed of the following components by weight: 50 parts of fluorosilicone rubber, 3 parts of antioxidant, 8 parts of adhesive treatment agent, 10 parts of abrasion-resistant carbon black, 3 parts of vulcanizing agent, 15 parts of naphthenic oil, 10 parts of structure control agent, and 4 parts of flow aid.

[0053] In this example, the raw materials of the adhesive treatment agent are composed of the following components by weight: 20 parts of vinyl acetate latex, 30 parts of carboxylated nitrile latex, 15 parts of water-soluble epoxy resin, 12 parts of polyvinyl chloride copolymer, and 8 parts of accelerator.

[0054] Example 3

[0055] In this example, the raw materials of the rubber layer are composed of the following components by weight: 45 parts of fluorosilicone rubber, 2 parts of antioxidant, 7 parts of adhesive treatment agent, 9 parts of abrasion-resistant carbon black, 2 parts of vulcanizing agent, 12 parts of naphthenic oil, 8 parts of structure control agent, and 3 parts of flow aid.

[0056] In this example, the raw materials of the adhesive treatment agent are composed of the following components by weight: 18 parts of vinyl acetate latex, 25 parts of carboxylated nitrile latex, 12 parts of water-soluble epoxy resin, 10 parts of polyvinyl chloride copolymer, and 6 parts of accelerator.

[0057] Example 4

[0058] In this example, the raw materials of the rubber layer are composed of the following components by weight: 50 parts of fluorosilicone rubber, 3 parts of antioxidant, 6 parts of adhesive treatment agent, 8 parts of abrasion-resistant carbon black, 2 parts of vulcanizing agent, 14 parts of naphthenic oil, 9 parts of structure control agent, and 4 parts of flow aid.

[0059] In this example, the raw materials of the adhesive treatment agent are composed of the following components by weight: 20 parts of vinyl acetate latex, 26 parts of carboxylated nitrile latex, 14 parts of water-soluble epoxy resin, 11 parts of polyvinyl chloride copolymer, and 7 parts of accelerator.

[0060] Experimental Test

[0061] Test conditions: Examples 1, 2, 3, and 4 were selected as the experimental test objects. The performance of the fabric-reinforced films prepared in Examples 1 to 4 was tested using existing testing methods. The test results are shown in the table below:

[0062]

[0063]

[0064] As can be seen from the above surface, the fluorosilicone rubber reinforced fabric diaphragm prepared in Example 3 of the present invention has the characteristics of tear resistance and fatigue resistance while ensuring high strength. Moreover, the peel area of ​​the reinforced fabric diaphragm prepared in Example 3 is the smallest. It can be seen that the adhesive strength of the reinforced fabric diaphragm prepared in Example 3 is significantly higher than that of the reinforced fabric diaphragms prepared in other examples. This shows that the reinforced fabric diaphragm prepared in the present invention can increase the adhesion between the base fabric and the rubber layer by adding an adhesive treatment agent to the rubber layer raw material and treating the base fabric with a special adhesive treatment agent, thereby improving the performance stability of the fluorosilicone rubber reinforced fabric diaphragm.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fluorosilicone rubber-reinforced fabric diaphragm, characterized in that, The fluorosilicone rubber-insulated film comprises a base fabric (2) and a rubber layer (1) on the surface of the base fabric (2), wherein the rubber layer (1) has the same shape as the base fabric (2). The preparation method of the fluorosilicone rubber-insulated film includes the following steps: S1. Preparation of rubber layer (1); The raw materials of the rubber layer (1) are composed of the following components by weight: 40-50 parts of fluorosilicone rubber, 1-3 parts of antioxidant, 6-8 parts of adhesive treatment agent, 8-10 parts of abrasion-resistant carbon black, 1.5-3 parts of vulcanizing agent, 10-15 parts of naphthenic oil, 5-10 parts of structure control agent, and 2-4 parts of flow aid. S2. Preparation of adhesive treatment agent; The raw materials of the adhesive treatment agent are composed of the following components by weight: 15-20 parts of vinyl acetate latex, 20-30 parts of carboxylated nitrile latex, 10-15 parts of water-soluble epoxy resin, 8-12 parts of polyvinyl chloride copolymer, and 5-8 parts of accelerator. S3. Impregnate the base fabric (2) with adhesive. Immerse the base fabric (2) in the adhesive treatment solution for 30-50 seconds, then remove and air dry for later use; S4, vulcanization molding; The soaked and dried base fabric (2) and the rubber layer (1) prepared in S1 are placed into a mold for vulcanization molding to obtain a fluorosilicone rubber-insulated film. The preparation method of the rubber layer (1) is as follows: A1. Add a certain weight of fluorosilicone rubber, antioxidant, abrasion-resistant carbon black, vulcanizing agent and naphthenic oil to a mixing equipment for preliminary mixing for 5-8 minutes and discharge temperature of 140-150℃ to obtain preliminary mixture. A2. Then add a certain amount of adhesive, structure control agent and flow aid to the preliminary compound obtained above in sequence, and perform secondary mixing treatment on it using an internal mixer for 2-3 minutes at a temperature of 80-100℃. After mixing is completed, discharge the glue and sheet it at a temperature of 80-90℃, and then cool it to obtain the compound. A3. After passing the obtained compound through a two-roll mill, the rubber layer (1) is obtained. The adhesive treatment agent is prepared by placing a certain weight of vinyl acetate latex, carboxylated nitrile latex, water-soluble epoxy resin, polyvinyl chloride copolymer and accelerator into a mixer and mixing them uniformly at 40-50℃ for 20-30 minutes at a mixing speed of 300-500 r / min. After the mixture is uniformly mixed, the adhesive treatment agent can be obtained.

2. The fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The antioxidant is a mixture of active magnesium oxide and active calcium oxide, wherein the mass ratio of active magnesium oxide to active calcium oxide is 2:

1.

3. The fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The vulcanizing agent is a peroxide or sulfur masterbatch granules.

4. The fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The structure control agent is hydroxyl fluorosilicone oil, and the flow aid is a paraffin-based flow aid.

5. A fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The vulcanization conditions in S4 are: temperature 160±2℃, vulcanization pressure 10±1Mpa, and vulcanization time 5-15min.

6. A fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The sheet thickness of the mixed rubber compound in A3 after passing through the open mill is 0.1-0.15 mm.

7. A fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The accelerator is one or more of azoles, guanidines, and sulfenamides.

8. A fluorosilicone rubber-reinforced fabric diaphragm according to claim 1, characterized in that, The polyvinyl chloride copolymer is an aqueous emulsion, and the average particle size of the polyvinyl chloride copolymer is 200-400 nm.

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