Outer-layer rubber for aging-resistant rubber dam and preparation method of outer-layer rubber

Abstract

The invention relates to the technical field of rubber, in particular to outer-layer rubber of an aging-resistant rubber dam and a preparation method of the outer-layer rubber, the outer-layer rubber is prepared from the following raw materials in parts by weight: 100 parts of chloroprene rubber (CR), 5 parts of zinc oxide (ZnO), 2.5 parts of an anti-aging agent, an anti-aging agent 4010, an anti-aging agent 4010NA, 2 parts of an accelerant and a combined system of an accelerant NA-22 and an accelerant TT (or DM), according to the anti-aging rubber dam outer layer rubber, the service life of a dam can be remarkably prolonged, and performance reduction and potential safety hazards caused by material aging are reduced. The outer-layer rubber has excellent weather resistance, chemical corrosion resistance and ultraviolet irradiation resistance, and can keep stable physical properties even in an extreme environment, so that safe and stable operation of the dam under various working conditions is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of rubber, in particular to an outer layer rubber of an aging-resistant rubber dam and a preparation method thereof. Background Art

[0002] As an important water conservancy engineering structure, rubber dams are widely used in many fields such as regulating water flow, flood control, irrigation and power generation. The outer rubber material must not only have good elasticity, toughness and sealing performance, but also have excellent aging resistance to cope with the challenges brought by long-term exposure to complex and changeable natural environments (such as ultraviolet radiation, high temperature, humidity, oxidation and chemical corrosion, etc.).

[0003] Although the traditional outer layer materials of rubber dams meet the basic performance requirements to a certain extent, they are easily affected by environmental factors and age during long-term service, resulting in a decline in material performance, such as increased hardness, reduced elasticity, surface cracking and even damage, which seriously affects the safety and service life of the dam. With the development of material science, the aging resistance of rubber materials has been continuously improved by improving rubber formulas, adding anti-aging additives, and adopting new cross-linking technologies. However, these methods often have limitations such as high costs, complex processes, or adverse effects on the environment, which restricts their widespread application in the outer layer materials of rubber dams. Summary of the invention

[0004] 1. Purpose of the invention In view of this, the purpose of the present invention is to provide an outer layer rubber of an aging-resistant rubber dam and a preparation method thereof, so as to solve the problems raised in the above background.

[0005] (II) Technical solution An outer layer rubber of an aging-resistant rubber dam, the outer layer rubber being prepared from the following raw materials in parts by weight: Neoprene (CR): 100 parts, Zinc oxide (ZnO): 5 parts, Anti-aging agent: 2.5 parts, selected from antioxidant 4010, antioxidant 4010NA, Accelerator: 2 parts, selected from the combination of accelerator NA-22 and accelerator TT (or DM), Plasticizer: 12 parts, selected from DBP or a combination of DBP and coumarone, Carbon black: 45 parts, Other additives: appropriate amount, including vulcanizing agent, tackifier, among which the vulcanizing agent is preferably PbO, and the dosage is preferably 15 parts, The outer rubber layer has excellent water resistance and aging resistance, and is suitable for occasions such as rubber dams that need to withstand long-term water scouring and natural environmental erosion.

[0006] Preferably, the outer layer rubber of the aging-resistant rubber dam is prepared, and the outer layer rubber is combined with an inner layer rubber or other structural layers to form a complete rubber dam structure. During the manufacturing process, key parts of the rubber dam are reinforced, such as adding reinforcing sheets or reinforcing ribs, to improve its overall strength and durability.

[0007] Preferably, the reinforcement treatment also includes special treatment of the joints of the rubber dam, such as secondary sealing with sealant or waterproof tape to improve the waterproof performance and durability of the joints.

[0008] A method for preparing an outer layer of rubber for an aging-resistant rubber dam comprises the following steps: 1). Raw material preparation: prepare chloroprene rubber, zinc oxide, antioxidant, accelerator, plasticizer, carbon black and other additives according to the weight ratio of claim 1; 2). Mixing: Mix chloroprene rubber with other raw materials on an open or closed rubber mixer. During the mixing process, control the roller temperature to ensure uniform mixing to obtain a mixed rubber; 3) Gluing: Apply the mixed rubber on the nylon canvas which has been impregnated with chemicals and coated with adhesive paste. Dry it before gluing to remove moisture from the canvas surface. Ensure sufficient sizing during the gluing process and dry it. 4). Calendering: Use a calender to press the coated canvas and rubber layer into one, control the calendering roller to gently calender the thickness, and obtain the outer layer of rubber cloth; 5). Vulcanization: vulcanize the outer layer of rubber tape on a vulcanizer, control the vulcanization temperature, time and pressure to obtain the vulcanized outer layer of rubber; 6). Cutting and splicing: Cut the vulcanized outer rubber into the required size, and use the concave and convex yin and yang structure splicing method to splice several rubber sheets into the outer layer of the rubber dam bag body.

[0009] Preferably, the vulcanization conditions are a steam pressure of x pounds per square inch and a time of x minutes (the specific value is determined according to the test). During the vulcanization process, the surface of the tape is kept smooth and flat without bubbling or serious lack of glue. Before vulcanization, the calendered outer tape is preheated at a preheating temperature of y°C and a preheating time of z minutes to improve the vulcanization effect and product quality.

[0010] Preferably, in the cutting and splicing steps, the rubber sheets are cut into the desired shape and size mechanically or manually, and the spliced ​​parts are pressed together using a special adhesive or hot pressing method to ensure that the flexural properties of the spliced ​​parts are the same as those of the central sheet, thereby reducing the width of the spliced ​​parts and the number of rubber sheets.

[0011] Preferably, in the cutting and splicing steps, the splicing surfaces of the rubber sheets are polished to remove surface impurities and oxide layers, thereby improving the bonding strength and sealing of the splicing surfaces.

[0012] It can be seen from the above technical solutions that the present application has the following beneficial effects: The aging-resistant rubber outer layer of the rubber dam provided by the invention can significantly extend the service life of the dam and reduce the performance degradation and safety hazards caused by material aging. This outer layer of rubber has excellent weather resistance, chemical corrosion resistance and UV resistance, and can maintain stable physical properties even in extreme environments, thereby ensuring the safe and stable operation of the dam under various working conditions.

[0013] The preparation method of the invention is not only scientific and reasonable, but also easy to operate and easy to industrialize. By optimizing the raw material ratio and the preparation process, the production cost can be effectively reduced and the production efficiency can be improved. At the same time, the method also reduces the pollution to the environment and conforms to the concept of sustainable development. Therefore, the preparation method of the invention can bring significant economic and social benefits to enterprises.

[0014] The invention of the aging-resistant rubber dam outer layer rubber and its preparation method has injected new vitality into the development of rubber dam technology. It not only solves the problem of easy aging of the outer layer material of traditional rubber dams, but also provides a useful reference and reference for subsequent technological innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0016] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0017] See also Figure 1 , an embodiment provided by the present invention: An outer layer rubber of an aging-resistant rubber dam, the outer layer rubber is prepared from the following raw materials in parts by weight: Neoprene (CR): 100 parts, Zinc oxide (ZnO): 5 parts, Anti-aging agent: 2.5 parts, selected from antioxidant 4010, antioxidant 4010NA, Accelerator: 2 parts, selected from the combination of accelerator NA-22 and accelerator TT (or DM), Plasticizer: 12 parts, selected from DBP or a combination of DBP and coumarone, Carbon black: 45 parts, Other additives: appropriate amount, including vulcanizing agent, tackifier, among which the vulcanizing agent is preferably PbO, and the dosage is preferably 15 parts, The outer rubber layer has excellent water resistance and aging resistance, and is suitable for rubber dams and other occasions that need to withstand long-term water erosion and natural environmental erosion.

[0018] Furthermore, the outer layer of rubber of the aging-resistant rubber dam is prepared, and the outer layer of rubber is combined with the inner layer of rubber or other structural layers to form a complete rubber dam structure. During the manufacturing process, key parts of the rubber dam are reinforced, such as adding reinforcing plates or ribs to improve its overall strength and durability, enhance the bearing capacity of the dam, and also improve its impact resistance, tear resistance and wear resistance, ensuring the stable operation of the dam under extreme conditions.

[0019] Furthermore, the enhancement treatment also includes special treatment of the joints of the rubber dam, such as secondary sealing with sealant or waterproof tape to improve the waterproof performance and durability of the joints. This measure reduces the possibility of water and chemicals penetrating through the joints, thereby protecting the integrity of the internal structure of the dam. At the same time, this also reduces the cost of repairs and replacements caused by joint problems and extends the service life of the dam.

[0020] A method for preparing an outer layer of rubber for an aging-resistant rubber dam comprises the following steps: 1). Raw material preparation: prepare chloroprene rubber, zinc oxide, antioxidant, accelerator, plasticizer, carbon black and other additives according to the weight ratio of claim 1; 2). Mixing: Mix chloroprene rubber with other raw materials on an open or closed rubber mixer. During the mixing process, control the roller temperature to ensure uniform mixing to obtain a mixed rubber; 3) Gluing: Apply the mixed rubber on the nylon canvas which has been impregnated with chemicals and coated with adhesive paste. Dry it before gluing to remove moisture from the canvas surface. Ensure sufficient sizing during the gluing process and dry it. 4). Calendering: Use a calender to press the coated canvas and rubber layer into one, control the calendering roller to gently calender the thickness, and obtain the outer layer of rubber cloth; 5). Vulcanization: vulcanize the outer layer of rubber tape on a vulcanizer, control the vulcanization temperature, time and pressure to obtain the vulcanized outer layer of rubber; 6). Cutting and splicing: Cut the vulcanized outer rubber into the required size, and use the concave and convex yin and yang structure splicing method to splice several rubber sheets into the outer layer of the rubber dam bag body.

[0021] Furthermore, the vulcanization conditions are x pounds per square inch of steam pressure and x minutes of time (the specific value is determined according to the test). During the vulcanization process, the surface of the rubber tape is kept smooth and flat, without bubbling or serious lack of rubber. Before vulcanization, the outer layer of the calendered rubber tape is preheated at a temperature of y°C and a preheating time of z minutes to improve the vulcanization effect and product quality. The preheating treatment can make the rubber material reach a certain temperature before vulcanization, thereby accelerating the vulcanization reaction and shortening the vulcanization time. At the same time, the preheating treatment can also make the rubber material more evenly accept the heat during the vulcanization process, and can also reduce the internal stress that may occur during the vulcanization process, and improve the toughness and fatigue resistance of the rubber.

[0022] Furthermore, in the cutting and splicing steps, the rubber sheets are cut into the required shape and size by mechanical or manual methods, and the splicing parts are pressed together by special adhesives or hot pressing methods to ensure that the flexural performance of the splicing parts is the same as that of the central sheet body, and the width of the splicing parts and the number of rubber sheets are reduced. Reducing the width of the splicing parts and the number of rubber sheets can optimize the manufacturing efficiency and cost of the rubber dam. A wider splicing part will increase material consumption and manufacturing difficulty, while reducing the number of rubber sheets can simplify the manufacturing process and shorten the production cycle. Through precise cutting and efficient splicing, the manufacturing efficiency of the rubber dam can be improved and the cost can be reduced while ensuring quality.

[0023] Furthermore, the splicing surface of the rubber sheet is polished during the cutting and splicing steps to remove surface impurities and oxide layers, thereby improving the bonding strength and sealing of the splicing surface. By improving the bonding strength and sealing, it can be ensured that the splicing will not loosen, crack or leak during long-term operation. This not only extends the service life of the rubber dam, but also improves its reliability and safety in water conservancy projects.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An outer layer rubber of an aging-resistant rubber dam, characterized by: The outer layer rubber is prepared from the following raw materials in parts by weight: Neoprene (CR): 100 parts, Zinc oxide (ZnO): 5 parts, Anti-aging agent: 2.5 parts, selected from antioxidant 4010, antioxidant 4010NA, Accelerator: 2 parts, selected from the combination of accelerator NA-22 and accelerator TT (or DM), Plasticizer: 12 parts, selected from DBP or a combination of DBP and coumarone, Carbon black: 45 parts, Other additives: appropriate amount, including vulcanizing agent, tackifier, among which the vulcanizing agent is preferably PbO, and the dosage is preferably 15 parts, The outer rubber layer has excellent water resistance and aging resistance, and is suitable for occasions such as rubber dams that need to withstand long-term water scouring and natural environmental erosion.

2. The outer layer rubber of an aging-resistant rubber dam according to claim 1 is characterized by: The outer rubber layer of the aging-resistant rubber dam is prepared, and the outer rubber layer is combined with the inner rubber layer or other structural layers to form a complete rubber dam structure. During the manufacturing process, key parts of the rubber dam are reinforced, such as adding reinforcing sheets or reinforcing ribs, to improve its overall strength and durability.

3. The outer layer rubber of the aging-resistant rubber dam according to claim 2 is characterized by: The reinforcement treatment also includes special treatment of the joints of the rubber dam, such as secondary sealing with sealant or waterproof tape to improve the waterproof performance and durability of the joints.

4. A method for preparing the outer layer rubber of an aging-resistant rubber dam, characterized in that: The following steps are involved: 1). Raw material preparation: prepare chloroprene rubber, zinc oxide, antioxidant, accelerator, plasticizer, carbon black and other additives according to the weight ratio of claim 1; 2). Mixing: Mix chloroprene rubber with other raw materials on an open or closed rubber mixer. During the mixing process, control the roller temperature to ensure uniform mixing to obtain a mixed rubber; 3) Gluing: Apply the mixed rubber on the nylon canvas which has been impregnated with chemicals and coated with adhesive paste. Dry it before gluing to remove moisture from the canvas surface. Ensure sufficient sizing during the gluing process and dry it. 4). Calendering: Use a calender to press the coated canvas and rubber layer into one, control the calendering roller to gently calender the thickness, and obtain the outer layer of rubber cloth; 5). Vulcanization: vulcanize the outer layer of rubber tape on a vulcanizer, control the vulcanization temperature, time and pressure to obtain the vulcanized outer layer of rubber; 6). Cutting and splicing: Cut the vulcanized outer rubber into the required size, and use the concave and convex yin and yang structure splicing method to splice several rubber sheets into the outer layer of the rubber dam bag body.

5. The method for preparing the outer layer rubber of the aging-resistant rubber dam according to claim 4 is characterized in that: The vulcanization conditions are steam pressure of x pounds per square inch and time of x minutes (specific values ​​are determined according to experiments). During the vulcanization process, the surface of the tape is kept smooth and flat without bubbling or serious lack of glue. Before vulcanization, the calendered outer tape is preheated at a temperature of y°C and a preheating time of z minutes to improve the vulcanization effect and product quality.

6. The method for preparing the outer layer rubber of the aging-resistant rubber dam according to claim 4 is characterized by: In the cutting and splicing steps, the rubber sheets are cut into the required shape and size by mechanical or manual means, and the splicing parts are pressed together by special adhesives or hot pressing to ensure that the flexural properties of the splicing parts are the same as those of the central sheet, thereby reducing the width of the splicing parts and the number of rubber sheets.

7. The method for preparing the outer layer rubber of the aging-resistant rubber dam according to claim 4 is characterized by: In the cutting and splicing steps, the splicing surfaces of the rubber sheets are polished to remove surface impurities and oxide layers, thereby improving the bonding strength and sealing of the splicing surfaces.

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