Novel rubber sealing strip

Abstract

The utility model discloses a novel sealing rubber strip. The novel sealing rubber strip comprises a conductive core, an inner protective layer and an outer protective layer which are sequentially and tightly arranged from inside to outside, and the outer protection layer is made of a polyether-ether-ketone material. Polyether-ether-ketone (PEEK) has rigidity and flexibility, especially has very outstanding fatigue resistance under alternating stress, and can be suitable for the sealing rubber strip provided by the invention. The polyether-ether-ketone has a high melting point (334 DEG C) and a high glass transition temperature (143 DEG C), and the continuous use temperature is 260 DEG C; and the use requirement of the cable in a high-temperature environment is met. Polyether-ether-ketone has the advantages of high mechanical strength, high temperature resistance, impact resistance, flame retardance, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance and good electrical properties. And when being used as the outermost layer of the sealing rubber strip, the rubber strip can be effectively protected, so that the long-term stability and the service life of the rubber strip are ensured, and the rubber strip can be used in environments such as high temperature, high humidity, rain and snow, marine use and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rubber strips, in particular to a novel sealing rubber strip. Background Art

[0002] The electromagnetic environmental effect is one of the important factors affecting the security of electronic information. Among the many means to solve the electromagnetic interference problem, improving the shielding effectiveness of the chassis is the most basic and effective, and it will not affect the normal operation of the circuit. The use of suitable electromagnetic sealing materials at the joints of the electronic equipment chassis can maintain the conductive continuity of the equipment, thereby improving the shielding effectiveness of the chassis. Conductive rubber strips have high shielding effectiveness, are electrochemically compatible with aluminum chassis, are light in weight, and play a dual role of sealing, and are widely used in the communication field and other occasions.

[0003] A Chinese utility model patent with announcement number CN206461872U discloses a novel composite conductive rubber strip, the cross section of which is a Y-shaped composite structure. The Y-shaped composite conductive rubber strip is divided into a conductive layer and a non-conductive layer, wherein the conductive layer wraps the non-conductive layer.

[0004] However, if the chassis to which the conductive rubber strip is applied is exposed to high temperature, high humidity, rain and snow for a long time, redox reaction will occur at the metal or conductive rubber interface with different corrosion potentials, resulting in electrochemical corrosion. In marine environments, electrochemical corrosion is most serious. The existing composite conductive rubber strip is not suitable for chassis sealing and electromagnetic shielding in specific occasions. Utility Model Content

[0005] In order to overcome the above technical defects, the utility model provides a novel sealing rubber strip.

[0006] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0007] The utility model discloses a novel sealing rubber strip, which comprises a conductive core, an inner protective layer and an outer protective layer which are closely arranged in sequence from the inside to the outside;

[0008] The outer protective layer is made of polyetheretherketone material.

[0009] Preferably, the inner protective layer is made of hydrogenated nitrile rubber, and the thickness of the inner protective layer is greater than that of the outer protective layer.

[0010] Preferably, a shielding layer is provided between the conductive core and the inner protective layer.

[0011] Preferably, the shielding layer is a copper wire cloth tape wrapped around the conductive core.

[0012] Preferably, the conductive core is made of silicone rubber, and the silicone rubber of the conductive core is filled with silver-plated glass microbeads.

[0013] Preferably, the novel sealing rubber strip is a strip structure or a ring structure with an O-shaped cross section.

[0014] Preferably, the inner protective layer and the outer protective layer are filled with silver-plated glass beads.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a novel sealing rubber strip, which comprises a conductive core, an inner protective layer and an outer protective layer which are closely arranged in sequence from the inside to the outside; the outer protective layer is made of polyetheretherketone material.

[0017] Polyetheretherketone (PEEK) has rigidity and flexibility, especially its fatigue resistance under alternating stress is very outstanding, and it can be applied to the sealing rubber strip of this patent. Polyetheretherketone has a high melting point (334°C) and glass transition temperature (143°C), and a continuous use temperature of 260°C, which meets the requirements for the use of cables in high temperature environments. Polyetheretherketone has high mechanical strength, high temperature resistance, impact resistance, flame retardancy, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance and good electrical properties. Using it as the outermost layer of the sealing rubber strip can effectively protect the sealing rubber strip to ensure the long-term stability and service life of the rubber strip, and meet the requirements for use in high temperature, high humidity, rain, snow, and marine environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 It is a schematic diagram of the layer structure of the novel sealing rubber strip of the utility model;

[0020] Figure 2 This is a usage scenario diagram of the new sealing rubber strip of the utility model;

[0021] In the figure:

[0022] 10-conductive core;

[0023] 20-Shielding layer

[0024] 30-inner protective layer;

[0025] 40 - Outer protective layer. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] like Figure 1-2 As shown, a preferred structure of a new type of sealing rubber strip described in the utility model.

[0028] like Figure 1 As shown, the novel sealing rubber strip comprises a conductive core, an inner protective layer and an outer protective layer which are closely arranged in sequence from the inside to the outside; the outer protective layer is made of polyetheretherketone material.

[0029] In a specific implementation, the novel sealing rubber strip is a strip-shaped structure or a ring-shaped structure with an O-shaped cross section. The shape of the novel sealing rubber strip can be strip-shaped, circular, square, etc.

[0030] Among the main innovations of this patent, polyetheretherketone (PEEK) has rigidity and flexibility, especially its fatigue resistance under alternating stress is very outstanding, and it can be applied to the sealing rubber strip of this patent. Polyetheretherketone has a high melting point (334°C) and glass transition temperature (143°C), and a continuous use temperature of 260°C, which meets the requirements for the use of cables in high temperature environments. Polyetheretherketone has high mechanical strength, high temperature resistance, impact resistance, flame retardancy, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance and good electrical properties. Using it as the outermost layer of the sealing rubber strip can effectively protect the sealing rubber strip to ensure the long-term stability and service life of the rubber strip, and meet the requirements for use in high temperature, high humidity, rain, snow, and marine environments.

[0031] In this patent, the inner protective layer is made of hydrogenated nitrile rubber, and the thickness of the inner protective layer is greater than that of the outer protective layer.

[0032] The inner protective layer of the sealing rubber strip is made of hydrogenated nitrile rubber, which has good oil resistance, heat resistance, chemical corrosion resistance, ozone resistance, and compression permanent deformation resistance. At the same time, hydrogenated nitrile rubber also has the characteristics of high strength, high tearing performance, and excellent wear resistance. Hydrogenated nitrile rubber can also be used as a protective layer to increase service life.

[0033] By adopting a double-layer structure of an outer protective layer and an inner protective layer, the original electromagnetic shielding + water sealing properties of the sealed conductive rubber strip are maintained, and the use of the sealed rubber strip in harsh environments is greatly guaranteed.

[0034] In a specific implementation, the conductive core is made of silicone rubber, and the silicone rubber of the conductive core is filled with silver-plated glass micro-beads. The inner protective layer and the outer protective layer are filled with silver-plated glass micro-beads.

[0035] Traditional conductive rubber is formed by adding conductive particles to silicone rubber or fluororubber; it has round, rectangular, D-shaped and double-peak cross-sectional shapes, and is divided into two types: hollow and solid. However, it has an obvious disadvantage that the compression amount is difficult to control, and the shielding effect will deteriorate if the compression amount is not reached.

[0036] To this end, the present application has made the following optimization improvements and adopted a combination of technologies for enhanced shielding to ensure the electromagnetic shielding effect.

[0037] In a preferred embodiment, a shielding layer is provided between the conductive core and the inner protective layer. Specifically, the shielding layer is a copper wire cloth tape wrapped around the conductive core. In an embodiment, the wrapping width of the shielding layer is not less than 35% of the width of the copper wire cloth tape.

[0038] For other structures of the novel sealing rubber strip described in this embodiment, refer to the prior art.

[0039] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new type of rubber sealing strip, characterized in that: The novel sealing rubber strip comprises a conductive core, an inner protective layer and an outer protective layer which are arranged closely in sequence from the inside to the outside; The outer protective layer is made of polyetheretherketone material; A shielding layer is arranged between the conductive core and the inner protective layer, and the shielding layer is a copper wire cloth tape wrapped around the conductive core.

2. A new type of rubber sealing strip according to claim 1, characterized in that: The inner protective layer is made of hydrogenated nitrile rubber, and the thickness of the inner protective layer is greater than that of the outer protective layer.

3. A new type of rubber sealing strip according to claim 1, characterized in that: The novel sealing rubber strip is a strip structure or a ring structure with an O-shaped cross section.

Images