Wear-resistant rubber part framework for traction, squeezing and dragging

Abstract

The invention discloses a wear-resistant rubber part framework for traction, squeezing and dragging, and belongs to the technical field of rubber sealing assemblies, the wear-resistant rubber part framework comprises a steel framework and a rubber part wrapping the steel framework, and patterns are arranged on the outer surface of the rubber part. The rubber part comprises the following raw materials in parts by weight: 85-95 parts of nitrile rubber, 25-35 parts of modified carbon black, 1-2 parts of rubber oil, 10-12 parts of a plasticizer, 3-5 parts of light calcium carbonate, 3-5 parts of zinc oxide, 0.5-1 part of an anti-aging agent, 1-2 parts of an accelerant and 1.5-3 parts of a vulcanizing agent; the preparation method comprises the following steps: weighing according to parts by weight, mixing the nitrile rubber, adding the modified carbon black, the rubber oil, the plasticizer, the light calcium carbonate, the zinc oxide, the anti-aging agent, the accelerant and the vulcanizing agent, continuously mixing, discharging rubber, and discharging sheets to obtain a rubber compound; the rubber compound is poured into a mold for vulcanization treatment, and a rubber part is obtained; and carrying out pattern treatment, correction, polishing and cleaning on the surface of the rubber part, and then assembling the rubber part with the steel skeleton.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber sealing components, and in particular relates to a wear-resistant rubber component skeleton used for traction and squeezing. Background Art

[0002] Fiber braided pultruded cable protection sleeve, referred to as BWFRP (braiding-winding fiber reinforced plastics) in English. BWFRP pipes are mainly made of alkali-free glass fiber and resin as raw materials, and are a new type of material produced by continuous fiber online complete braiding, winding, pultrusion and one-piece molding process. As a type of power cable protection sleeve, BWFRP pipes are widely used in municipal engineering, urban power grids, rail transit, etc.

[0003] BWFRP power pipes are mainly used for cable protection. The pipe rack is mainly used to support and fix the cable protection pipe. The pipe rack can also be used to prevent the power pipe from sinking and shifting, and to buffer and prevent shock. The pipe racks of BWFRP power pipes in the prior art are mostly made of PE polyethylene and polypropylene, etc., and have the characteristics of pressure resistance, shock resistance, and corrosion resistance. However, in the BWFRP power cable pipe industry, due to the influence of its material and manufacturing process, the traction value of BWFRP power pipes is extremely large. Under this high-strength force requirement, higher requirements are placed on the pipe rack, which not only needs to ensure friction, but also needs to ensure that the pipe rack has a certain strength, so that it can provide a certain adhesion for grasping the pipe when squeezing up and down.

[0004] Therefore, it is urgent to develop a skeleton suitable for BWFRP power pipes with high strength and excellent wear resistance during traction and squeezing. Summary of the invention

[0005] The purpose of the present invention is to provide a wear-resistant rubber frame for traction and squeezing to solve one of the technical problems mentioned in the background technology.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A wear-resistant rubber frame for traction and squeezing, comprising a steel frame and a rubber piece coated outside the steel frame, wherein the outer surface of the rubber piece has a pattern, and the rubber piece comprises the following raw materials in parts by weight:

[0008] Nitrile rubber: 85-95 parts, modified carbon black: 25-35 parts, rubber oil: 1-2 parts, plasticizer: 10-12 parts, light calcium carbonate: 3-5 parts, zinc oxide: 3-5 parts, antioxidant: 0.5-1 parts, accelerator: 1-2 parts, vulcanizer: 1.5-3 parts;

[0009] The preparation steps of the modified carbon black are as follows:

[0010] Add carbon black and isocyanate to butyl acetate and mix evenly, introduce nitrogen protection, stir and react at 60-90°C for 2-3 hours, add hydroxy polydimethylsiloxane, continue to stir and react for 2-3 hours, add anhydrous ethanol, continue to stir for 1-2 hours, cool to room temperature, distill under reduced pressure, dry, and grind to obtain modified carbon black.

[0011] In some embodiments of the present invention, the usage ratio of carbon black, isocyanate, butyl acetate, hydroxy polydimethylsiloxane and anhydrous ethanol is 5-8 g: 0.5-0.6 g: 100 mL: 4-6 mL: 1-1.5 mL.

[0012] In some embodiments of the present invention, the carbon black is at least one of white carbon black and black carbon black.

[0013] In some embodiments of the present invention, the grinding is performed to a particle size of 100-200 nm.

[0014] In some embodiments of the present invention, the plasticizer is one of dioctyl phthalate and dibutyl phthalate.

[0015] In some embodiments of the present invention, the antioxidant is one of antioxidant ODA, antioxidant 4010NA, and paraffin.

[0016] In some embodiments of the present invention, the accelerator is at least one of accelerator M, accelerator DM, and accelerator DTDM.

[0017] In some embodiments of the present invention, the vulcanizing agent is one of sulfur and dicumyl peroxide.

[0018] In some embodiments of the present invention, the shape of the pattern includes at least one of a stripe pattern, a ram's horn pattern, a herringbone pattern, and a block pattern.

[0019] In some embodiments of the present invention, the steps for preparing the wear-resistant rubber skeleton for traction and extrusion are as follows:

[0020] S1, weighing by weight, mixing the nitrile rubber, adding modified carbon black, rubber oil, plasticizer, light calcium carbonate, zinc oxide, antioxidant, accelerator and vulcanizing agent, and continuing to mix, discharging the rubber, and producing sheets to obtain a mixed rubber;

[0021] S2, pouring the mixed rubber into a mold for vulcanization to obtain a rubber part;

[0022] S3. Process the pattern on the surface of the rubber part, and then assemble it with the steel frame after correction, polishing and cleaning.

[0023] Beneficial effects of the present invention:

[0024] The present invention provides a wear-resistant rubber skeleton for traction and squeezing, which uses nitrile rubber, modified carbon black, rubber oil, plasticizer, light calcium carbonate, zinc oxide, antioxidant and vulcanizer as rubber raw materials to prepare rubber with excellent mechanical strength and wear resistance. The carbon black used has an obvious reinforcing effect on rubber, and the mechanical properties and wear resistance of the rubber after adding carbon black are greatly improved. However, there are a large number of hydroxyl groups on the surface of carbon black, which are compatible with polymer materials and prone to agglomeration. The aggregation of carbon black will cause separation from the rubber matrix and expose it, thereby affecting the mechanical properties and wear resistance of the rubber. Therefore, the present invention covalently grafts terminal hydroxyl polydimethylsiloxane to the surface of isocyanate-modified carbon black to obtain modified carbon black. Due to the silicone-type polyurethane grafted on the surface of carbon black, an inorganic-organic combined material is formed, which increases the interaction with rubber, improves the compatibility and dispersion of carbon black, and enables carbon black to be evenly dispersed in rubber. In addition, the surface of the modified carbon black is grafted with silicone-type polyurethane, which reduces the friction between it and the rubber molecular chain, maximizes the rigidity of the carbon black, and synergistically resists the influence of external loads, thereby improving the mechanical strength of the rubber.

[0025] The present invention provides a steel frame inside the rubber part and an anti-skid pattern on the outer surface. Compared with the traditional plastic pipe rack, the rubber part frame provided by the present invention has the characteristics of high strength, can play a great supporting role and is not easy to deform; in addition, the anti-skid pattern is provided on the outside of the rubber part to further improve the wear resistance and anti-skid performance of the rubber part frame, which can effectively support and pull the power pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a structural schematic diagram of a wear-resistant rubber frame for traction and squeezing in the present invention;

[0028] Figure 2 The present invention is a schematic structural diagram of a wear-resistant rubber frame for traction and squeezing. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The nitrile rubber used in the embodiments and comparative examples of the present invention was purchased from Ningbo Shunze Rubber Co., Ltd.; the zinc oxide used was purchased from Tianjin Qilun Chemical Technology Co., Ltd.; the sulfur used was purchased from Anqing Guoxing Chemical Co., Ltd.; the antioxidant 4010NA used was purchased from Shanghai Junpu Chemical Co., Ltd.

[0031] Example 1

[0032] This embodiment provides a wear-resistant rubber frame for traction and squeezing, comprising a steel frame and a rubber frame with a pattern coated outside the steel frame, wherein the rubber frame comprises the following raw materials in parts by weight:

[0033] Nitrile rubber: 85 parts, modified carbon black: 25 parts, rubber oil: 1 part, dioctyl phthalate: 10 parts, light calcium carbonate: 3 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 1 part, sulfur: 1.5 parts;

[0034] The preparation steps of the modified carbon black are as follows:

[0035] Add 5 g of carbon black and 0.5 g of isocyanate to 100 mL of butyl acetate and mix well. Pass nitrogen protection, stir and react at 65 ° C for 3 h, add 5 mL of hydroxy polydimethylsiloxane, continue to stir and react for 3 h, add 1 mL of anhydrous ethanol, continue to stir for 2 h, cool to room temperature, distill under reduced pressure, dry, and grind to a particle size of 100 nm to obtain modified carbon black.

[0036] The steps for preparing the above-mentioned wear-resistant rubber frame for traction and squeezing are as follows:

[0037] S1, weighing by weight, mixing the nitrile rubber, adding modified carbon black, rubber oil, dioctyl phthalate, light calcium carbonate, zinc oxide, antioxidant 4010NA, accelerator M and sulfur, and continuing to mix, draining the rubber, and producing sheets to obtain a mixed rubber;

[0038] S2, pouring the mixed rubber into a mold for vulcanization to obtain a rubber part;

[0039] S3. Process the pattern on the surface of the rubber part, and then assemble it with the steel frame after correction, polishing and cleaning.

[0040] The pattern of this embodiment is in the shape of a stripe pattern.

[0041] Example 2

[0042] The only difference from Example 1 is that:

[0043] The preparation steps of the modified carbon black are as follows:

[0044] Add 6.5 g of carbon black and 0.55 g of isocyanate to 100 mL of butyl acetate and mix well. Pass nitrogen protection, stir and react at 65 ° C for 3 h, add 5 mL of hydroxy polydimethylsiloxane, continue to stir and react for 3 h, add 1 mL of anhydrous ethanol, continue to stir for 2 h, cool to room temperature, distill under reduced pressure, dry, and grind to a particle size of 100 nm to obtain modified carbon black.

[0045] Example 3

[0046] The only difference from Example 1 is that:

[0047] The preparation steps of the modified carbon black are as follows:

[0048] Add 7.8 g of carbon black and 0.6 g of isocyanate into 100 mL of butyl acetate and mix well. Pass nitrogen protection, stir and react at 75 ° C for 3 h, add 5 mL of hydroxy polydimethylsiloxane, continue to stir and react for 3 h, add 1 mL of anhydrous ethanol, continue to stir for 2 h, cool to room temperature, distill under reduced pressure, dry, and grind to a particle size of 150 nm to obtain modified carbon black.

[0049] Example 4

[0050] The only difference from Example 1 is that:

[0051] The rubber component comprises the following raw materials in parts by weight:

[0052] Nitrile rubber: 85 parts, modified carbon black: 30 parts, rubber oil: 1 part, dioctyl phthalate: 10 parts, light calcium carbonate: 3 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 1 part, vulcanizing agent: 1.5 parts.

[0053] Example 5

[0054] The only difference from Example 1 is that:

[0055] The rubber component comprises the following raw materials in parts by weight:

[0056] Nitrile rubber: 90 parts, modified carbon black: 35 parts, rubber oil: 1.5 parts, dioctyl phthalate: 12 parts, light calcium carbonate: 5 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 1.5 parts, sulfur: 1.5 parts.

[0057] The shape of the pattern in this embodiment is a herringbone pattern.

[0058] Comparative Example 1

[0059] This comparative example provides a wear-resistant rubber frame for traction and squeezing, comprising a steel frame and a rubber member with a pattern coated outside the steel frame, wherein the rubber member comprises the following raw materials in parts by weight:

[0060] Nitrile rubber: 85 parts, carbon black: 25 parts, rubber oil: 1 part, dioctyl phthalate: 10 parts, light calcium carbonate: 3 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 1 part, sulfur: 1.5 parts;

[0061] The steps for preparing the above-mentioned wear-resistant rubber frame for traction and squeezing are as follows:

[0062] S1, weighing by weight, mixing the nitrile rubber, adding carbon black, rubber oil, dioctyl phthalate, light calcium carbonate, zinc oxide, antioxidant 4010NA, accelerator M and sulfur, and continuing to mix, draining the rubber, and producing sheets to obtain a mixed rubber;

[0063] S2, pouring the mixed rubber into a mold for vulcanization to obtain a rubber part;

[0064] S3. Process the pattern on the surface of the rubber part, and then assemble it with the steel frame after correction, polishing and cleaning.

[0065] The pattern of this comparative example adopts a stripe pattern.

[0066] Comparative Example 2

[0067] The only difference from Example 1 is that:

[0068] The preparation steps of the modified carbon black are as follows:

[0069] Add 3.5 g of carbon black and 0.5 g of isocyanate to 100 mL of butyl acetate and mix well. Pass nitrogen protection, stir and react at 65 ° C for 3 h, add 5 mL of hydroxy polydimethylsiloxane, continue to stir and react for 3 h, add 1 mL of anhydrous ethanol, continue to stir for 2 h, cool to room temperature, distill under reduced pressure, dry, and grind to a particle size of 100 nm to obtain modified carbon black.

[0070] Comparative Example 3

[0071] The only difference from Example 1 is that:

[0072] 25 parts of modified carbon black were replaced with 18 parts of modified carbon black.

[0073] Comparative Example 4

[0074] The only difference from Example 1 is that:

[0075] 25 parts of modified carbon black were replaced with 43 parts of modified carbon black.

[0076] Comparative Example 5

[0077] The only difference from Example 1 is that:

[0078] The rubber component comprises the following raw materials in parts by weight:

[0079] Nitrile rubber: 70 parts, modified carbon black: 25 parts, rubber oil: 1 part, dioctyl phthalate: 8 parts, light calcium carbonate: 2 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 1 part, sulfur: 1.5 parts.

[0080] Comparative Example 6

[0081] The only difference from Example 1 is that:

[0082] The rubber component comprises the following raw materials in parts by weight:

[0083] Nitrile rubber: 90 parts, modified carbon black: 45 parts, rubber oil: 0.8 parts, dioctyl phthalate: 10 parts, light calcium carbonate: 0.5 parts, zinc oxide: 3 parts, antioxidant 4010NA: 0.5 parts, accelerator M: 0.5 parts, sulfur: 2 parts.

[0084] The rubber parts obtained in Examples 1-5 and Comparative Examples 1-6 were subjected to performance tests:

[0085] (1) Tensile properties test: Tested in accordance with GB / T 528-2009;

[0086] (2) Tear performance test: Tested in accordance with GB / T 529-2008;

[0087] (3) Compression set test: Tested in accordance with GB / T 531.1-2008;

[0088] (4) Abrasion test: The test shall be conducted in accordance with GB / T 9867-2008.

[0089] The above test results are shown in Table 1:

[0090] Table 1

[0091]

[0092] It can be seen from Table 1 that, compared with Comparative Examples 1-6, the tensile strength and tear strength in Example 1-5 are higher than those in Comparative Examples 1-6, and the compression permanent deformation and abrasion are lower than those in Comparative Examples 1-6. It can be seen that the wear-resistant rubber skeleton for traction and extrusion provided by the present invention has excellent mechanical properties and wear resistance, and is suitable for application fields such as BWFRP power pipes.

[0093] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant rubber frame for traction and squeezing, characterized in that: It comprises a steel frame and a rubber piece coated outside the steel frame, wherein the outer surface of the rubber piece has a pattern, and the rubber piece comprises the following raw materials in parts by weight: Nitrile rubber: 85-95 parts, modified carbon black: 25-35 parts, rubber oil: 1-2 parts, plasticizer: 10-12 parts, light calcium carbonate: 3-5 parts, zinc oxide: 3-5 parts, antioxidant: 0.5-1 parts, accelerator: 1-2 parts, vulcanizer: 1.5-3 parts; The preparation steps of the modified carbon black are as follows: Add carbon black and isocyanate to butyl acetate and mix evenly, introduce nitrogen protection, stir and react at 60-90°C for 2-3 hours, add hydroxy polydimethylsiloxane, continue to stir and react for 2-3 hours, add anhydrous ethanol, continue to stir for 1-2 hours, cool to room temperature, distill under reduced pressure, dry, and grind to obtain modified carbon black.

2. A wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The usage ratio of carbon black, isocyanate, butyl acetate, hydroxy polydimethylsiloxane and anhydrous ethanol is 5-8g: 0.5-0.6g: 100mL: 4-6mL: 1-1.5mL.

3. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The carbon black is at least one of white carbon black and black carbon black.

4. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: Grind to a particle size of 100-200 nm.

5. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The plasticizer is one of dioctyl phthalate and dibutyl phthalate.

6. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The antioxidant is one of antioxidant ODA, antioxidant 4010NA and paraffin.

7. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: At least one of the accelerator M, accelerator DM and accelerator DTDM.

8. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The vulcanizing agent is one of sulfur and dicumyl peroxide.

9. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The shape of the pattern includes at least one of a stripe pattern, a ram's horn pattern, a herringbone pattern, and a block pattern.

10. The wear-resistant rubber frame for traction and squeezing according to claim 1, characterized in that: The preparation steps of the wear-resistant rubber skeleton for traction and extrusion are as follows: S1, weighing by weight, mixing the nitrile rubber, adding modified carbon black, rubber oil, plasticizer, light calcium carbonate, zinc oxide, antioxidant, accelerator and vulcanizing agent, and continuing to mix, discharging the rubber, and producing sheets to obtain a mixed rubber; S2, pouring the mixed rubber into a mold for vulcanization to obtain a rubber part; S3. Process the pattern on the surface of the rubber part, and then assemble it with the steel frame after correction, polishing and cleaning.

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