Treatment method of rubber part

Abstract

The treatment method of the rubber part comprises the following steps: preparing a conductive adhesive, wherein the conductive adhesive comprises polyurethane acrylate, a thermal initiator, a diluent, a stabilizer and conductive powder; providing a copper wire, a first rubber body and a second rubber body; respectively coating the conductive adhesive on each bonding surface of the first rubber body and the second rubber body; and pressing the copper wire between the first rubber body and the second rubber body, electrifying the two ends of the copper wire, heating and pressurizing to cure the conductive adhesive, and forming the rubber part. According to the rubber part, the copper wire is bonded in the rubber part through the specific conductive adhesive, so that the problem of electrostatic discharge is solved, the internal bonding strength of the rubber part is high, metal separation is not prone to occurring, and the service life can be prolonged.

Description

Technical Field

[0001] The invention relates to the field of rubber manufacturing, and in particular to a method for processing rubber parts. Background Art

[0002] While rubber generally doesn't pose a concern for electrostatic discharge (ESD), it can be a significant issue in specialized industries, such as electronics. ESD can easily damage components and cause losses. Therefore, a treatment method for rubber components is necessary to address this issue. Summary of the Invention

[0003] The present invention aims to provide a method for processing a rubber part, wherein a copper wire is bonded to the inside of the rubber part through a specific conductive adhesive, thereby improving the problem of electrostatic discharge. In addition, the internal bonding strength of the rubber body is high, metal separation is not easily caused, and the service life can be extended.

[0004] To achieve the above-mentioned object, the rubber component processing method of the present invention comprises the following steps:

[0005] preparing a conductive adhesive comprising polyurethane acrylate, a thermal initiator, a diluent, a stabilizer and conductive powder;

[0006] Providing a copper wire and a first rubber body and a second rubber body;

[0007] Coating the conductive adhesive on each bonding surface of the first rubber body and the second rubber body respectively; and

[0008] The copper wire is pressed between the first rubber body and the second rubber body, electricity is applied to both ends of the copper wire, and the conductive adhesive is solidified after heating and pressurizing to form a rubber piece.

[0009] Compared to existing technologies, the present invention utilizes a conductive adhesive with a specific composition to laminate copper wire between a first rubber body and a second rubber body, resulting in a rubber part with excellent anti-static discharge properties. Furthermore, by pressing the copper wire between the first and second rubber bodies, electricity is applied to both ends of the copper wire, causing it to heat up. This heat is then transferred to the conductive adhesive, improving the adhesive's heating uniformity and enhancing the bonding effect. Furthermore, the resulting rubber part exhibits exceptionally high internal bond strength, with a peel strength of up to 35.5 kN / m. This prevents separation between the rubber body and the copper wire, thereby extending its service life.

[0010] As an embodiment, the polyurethane acrylate is polyether acrylate.

[0011] As an embodiment, the thermal initiator is benzoyl oxide.

[0012] As an embodiment, the diluent is a compound having an acrylate structure.

[0013] As an embodiment, before the conductive adhesive is applied to the bonding surfaces of the first rubber body and the second rubber body, the bonding surfaces of the first rubber body and the second rubber body are polished and cleaned with an isopropyl alcohol solution.

[0014] As an embodiment, the thickness of the conductive glue on the first rubber body and the second rubber body is 0.5-1.0 mm.

[0015] As an embodiment, before bonding the copper wire, the method further includes cleaning the copper wire with an isopropyl alcohol solution.

[0016] As an embodiment, the method further includes: coating the conductive adhesive on the copper wire.

[0017] As an embodiment, the heating and pressurizing includes controlling the temperature to be 120-140° C., the pressure to be 0.5-1.0 MPa, and the time to be 600-900 seconds.

[0018] As an embodiment, the curing includes curing at 80-100° C. for 20-40 minutes. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to some embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotations of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0023] The following examples further illustrate the present invention's method for treating rubber parts, without limiting the present invention. The present invention provides a method for treating rubber parts by bonding copper wire to the interior of the rubber part using a specific conductive adhesive, thereby alleviating electrostatic discharge issues. Furthermore, the rubber part exhibits high internal bonding strength, resisting metal separation and extending its service life. Furthermore, the method is simple and easy to operate, making it suitable for industrial application.

[0024] In one embodiment of the method for processing a rubber part of the present invention, the following steps are included:

[0025] preparing a conductive adhesive comprising polyurethane acrylate, a thermal initiator, a diluent, a stabilizer and conductive powder;

[0026] Providing a copper wire and a first rubber body and a second rubber body;

[0027] Coating the conductive adhesive on each bonding surface of the first rubber body and the second rubber body respectively; and

[0028] The copper wire is pressed between the first rubber body and the second rubber body, electricity is applied to both ends of the copper wire, and the conductive adhesive is solidified after heating and pressurizing to form a rubber piece.

[0029] The present invention utilizes a conductive adhesive with a specific composition to laminate copper wire between a first rubber body and a second rubber body, resulting in a rubber part with excellent anti-static discharge properties. Furthermore, by pressing the copper wire between the first and second rubber bodies, electricity is applied to both ends of the copper wire, causing it to heat up. This heat is then transferred to the conductive adhesive, improving the adhesive's heating uniformity and enhancing the bonding effect. Furthermore, the resulting rubber part exhibits exceptionally high internal bonding strength, with a peel strength of up to 35.5 kN / m. Separation between the rubber body and copper wire is unlikely to occur, thus extending its service life.

[0030] In a specific embodiment, the raw materials of the conductive adhesive are first prepared: polyurethane acrylate, thermal initiator, diluent, stabilizer and conductive powder. Specifically, the polyurethane acrylate is polyether acrylate, and the content is in the range of 20 to 80%. The thermal initiator is benzoyl peroxide, and the content is in the range of 0.2 to 8%. The diluent is selected from compounds with an acrylate structure, for example, isobornyl acrylate (IBOA), and the content is in the range of 2 to 30%. The metal powder can be selected from cheap iron powder or copper powder. The conductive adhesive containing metal powder is used as a bonding glue, which can improve the anti-static discharge performance to a certain extent.

[0031] Based on the consideration of bonding effect and use strength, the first rubber body and the second rubber body of the present invention are preferably chloroprene rubber, but are not limited thereto, and can also be natural rubber or other synthetic rubber based on diene.

[0032] The copper wire of the present invention may have a diameter of 0.1-0.5 mm and may be arranged continuously or discontinuously along the length of the rubber.

[0033] Specifically, the first rubber body, the second rubber body, and the copper wire were treated separately. First, the bonding surfaces of the first and second rubber bodies were polished with 100-grit sandpaper. Then, the bonding surfaces were cleaned 2-3 times with isopropyl alcohol and allowed to dry before use. Next, the copper wire was cleaned with an isopropyl alcohol solution and allowed to dry before use.

[0034] Next, apply conductive adhesive on the treated copper wire and let it air-dry for 20-30 minutes until the thickness reaches 1.0-2.0mm. Apply conductive adhesive on the bonding surface of the treated first rubber body and the second rubber body and let it air-dry for 10-20 minutes until the thickness reaches 0.5-1.0mm. The amount of hot-vulcanized adhesive used for each application is controlled at 150g / m 2 about.

[0035] Next, the copper wire is bonded between the two rubber bonding surfaces and preheated for 10 minutes to reach the bonding temperature. After preheating, the bonded assembly is heated and pressurized using a flat-plate vulcanizer for 600-900 seconds at a pressure of 0.5-1 MPa and a temperature of 120-140°C, preferably 135°C. Specifically, the copper wire's ends are electrically connected to a low-voltage transformer, heating the wire with a low voltage and high current. This allows the heat-inducing agent in the conductive adhesive to take effect quickly. The electrical resistance of the copper wire generates heat, transferring heat to the gel material in the conductive adhesive. This heat accelerates the curing of the conductive adhesive and improves its uniformity, thereby enhancing the bonding effect. The resulting rubber component has been tested to demonstrate strong bonding properties, with a peel strength of up to 35.5 kN / m. Separation between the rubber and copper wire is unlikely to occur. Furthermore, the combination of the conductive adhesive and copper wire significantly enhances the component's anti-static discharge properties, thereby extending its service life.

[0036] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for processing a rubber part, comprising the following steps: preparing a conductive adhesive comprising polyurethane acrylate, a thermal initiator, a diluent, a stabilizer and conductive powder; Providing a copper wire and a first rubber body and a second rubber body; Coating the conductive adhesive on each bonding surface of the first rubber body and the second rubber body respectively; as well as The copper wire is pressed between the first rubber body and the second rubber body, electricity is applied to both ends of the copper wire, and the conductive adhesive is solidified after heating and pressurizing to form a rubber piece.

2. The method for processing a rubber part according to claim 1, wherein: The polyurethane acrylate is polyether acrylate.

3. The method for processing a rubber part according to claim 1, wherein: The thermal initiator is benzoyl oxide.

4. The method for processing a rubber part according to claim 1, wherein: The diluent is a compound having an acrylate structure.

5. The method for processing a rubber part according to claim 1, wherein: Before the conductive adhesive is coated on the bonding surfaces of the first rubber body and the second rubber body respectively, the bonding surfaces of the first rubber body and the second rubber body are polished and cleaned with an isopropyl alcohol solution.

6. The method for processing a rubber part according to claim 1, wherein: The thickness of the conductive glue on the first rubber body and the second rubber body is 0.5-1.0 mm.

7. The method for processing a rubber part according to claim 1, wherein: Before bonding the copper wire, the method further includes cleaning the copper wire with an isopropyl alcohol solution.

8. The method for processing a rubber part according to claim 1, wherein: Also includes: The conductive glue is applied to the copper wire.

9. The method for processing a rubber part according to claim 1, wherein: The heating and pressurizing includes controlling the temperature to be 120-140° C., the pressure to be 0.5-1.0 MPa, and the time to be 600-900 seconds.

10. The method for processing a rubber part according to claim 1, wherein: The curing comprises curing at 80-100° C. for 20-40 minutes.