阅读说明：本技术 一种硅胶发泡垫片 (Silica gel foaming gasket ) 是由 关晓凤 于 2019-04-25 设计创作，主要内容包括：本发明涉及发泡材料领域,具体涉及一种硅胶发泡垫片。一种硅胶发泡垫片,包括第一硅胶层、第二硅胶层和第三硅胶层,三者交替分布,所述第二硅胶层是由所述第一硅胶层和所述第三硅胶层经过发泡反应制得,所述第二硅胶层作为支撑层位于所述第一硅胶层和所述第二硅胶层的中间,起到缓解冲击力的作用,所述第三硅胶层的厚度大于所述第一硅胶层或所述第二硅胶层的厚度。本发明制备的发泡垫片在应用到缓冲装置等部件时具有良好的抗冲击能力,并且使用寿命延长。(The invention relates to the field of foaming materials, in particular to a silica gel foaming gasket. The utility model provides a silica gel foaming gasket, includes first silica gel layer, second silica gel layer and third silica gel layer, the three distributes in turn, the second silica gel layer by first silica gel layer with third silica gel layer is made through the foaming reaction, the second silica gel layer is located as the supporting layer first silica gel layer with the effect of alleviating the impact is played in the centre on second silica gel layer, the thickness on third silica gel layer is greater than first silica gel layer or the thickness on second silica gel layer. The foam gasket prepared by the invention has good impact resistance when being applied to parts such as a buffer device and the like, and the service life is prolonged.)

1. The utility model provides a silica gel foaming gasket, includes first silica gel layer, second silica gel layer and third silica gel layer, its characterized in that, the third silica gel layer by first silica gel layer with second silica gel layer is made through the foaming reaction, the third silica gel layer is located as the supporting layer first silica gel layer with the centre on second silica gel layer, the thickness on third silica gel layer is less than first silica gel layer or the thickness on second silica gel layer.

2. The silica gel foaming gasket of claim 1, wherein the first silica gel layer is obtained by reacting a raw material A and a raw material B, wherein the raw material A comprises the following main components: 70 to 85 portions of functional silicone oil, 5 to 10 portions of methyl silicone oil, 5 to 10 portions of vinyl silicone oil, 0.5 to 1 portion of catalyst, 0.5 to 1 portion of foaming agent, 0.5 to 1 portion of pigment and 1 to 10 portions of reinforcing filler; the main components of the raw material B are as follows: 50-70 parts of functional silicone oil, 5-10 parts of vinyl silicone oil, 10-30 parts of cross-linking agent, 0-5 parts of pigment and 5-10 parts of reinforcing filler; the second silica gel layer is mainly obtained by reacting a raw material C and a raw material D, wherein the raw material C mainly comprises the following components: 60-70 parts of functional silicone oil, 5-10 parts of methyl silicone oil, 1-5 parts of catalyst, 5-10 parts of foaming agent, 0.5-1 part of pigment and 1-10 parts of reinforcing filler; the main components of the raw material D are as follows: 60 to 80 portions of functional silicone oil, 10 to 30 portions of vinyl silicone oil, 1 to 5 portions of cross-linking agent, 0 to 5 portions of pigment and 5 to 10 portions of reinforcing filler.

3. The foamed silica gel pad of claim 1, wherein the thickness of the third silica gel layer is 1.0mm to 1.5 mm; the thickness of the first silica gel layer or the second silica gel layer is 1.5 mm-1.8 mm.

4. The foamed silica gel pad according to claim 1, wherein the third silica gel layer is formed at a temperature of 40 ℃ to 60 ℃ for a reaction time of 10s to 30 s.

5. The foamed silicone gasket of claim 1, wherein the first silicone layer or the second silicone layer is formed by dispensing with a dispenser.

6. The silicone foam gasket as set forth in claim 5, wherein the dispensing process comprises:

conveying the raw material A of the first silica gel layer to a glue A channel of a glue dispenser, and conveying the raw material B to a glue B channel of the glue dispenser;

starting the dispenser, enabling the machine head to move in a snake shape along a preset track, and extruding a raw material A of a glue channel A in the dispenser and a raw material B of a glue channel B of the dispenser onto a bearing body of the silica gel foaming gasket to form a first silica gel layer blank;

conveying the component raw material C of the second silica gel layer to a glue channel A of a glue dispenser, and conveying the component raw material D to a glue channel B of the glue dispenser;

and starting the dispenser, enabling the machine head to move in a snake shape along a preset track, and extruding the raw material C of the glue channel A in the dispenser and the raw material D of the glue channel B in the dispenser onto the first silica gel layer blank to form a second silica gel layer blank.

7. The silicone rubber foam gasket as set forth in claim 6, wherein the dispensing parameters in the dispensing process are: the walking speed is 1m/min to 10m/min, the glue-spraying amount of the machine head is 0.5g/s to 3.0g/s, and the width of the glue line is 0.5mm to 5 mm.

8. The foamed silicone gasket of claim 7, wherein the density of the first silicone layer or the second silicone layer is 0.28g/cm³～0.38g/cm³The density of the third silica gel layer is 0.19g/cm³～0.27g/cm³The compression deformation rate of the first silica gel layer, the second silica gel layer or the third silica gel layer is 1.5-3.0%.

9. The foamed silica gel pad according to claim 8, wherein the third silica gel layer has an aperture ratio of 80% to 90%, and the first silica gel layer or the second silica gel layer has an aperture ratio of 60% to 70%.

Technical Field

The invention relates to the field of foaming materials, in particular to a silica gel foaming gasket.

Background

Silica gel integrates the characteristics of organic matters and the functions of inorganic matters due to the specific molecular structure of the silica gel. The foam material made by foaming silica gel is considered to be the most ideal material for sealing, buffering, shock insulation, flame retardance and insulation due to incomparable compression deformation resistance, excellent weather resistance, excellent performance stability at extreme temperature, excellent flame retardance, low smoke and low toxicity of flame during combustion and the like. At the earliest, the material is mainly used in the aspects of aerospace, and the application range of the material gradually expands various aspects of traffic, industrial production and life along with the improvement of requirements of safety, environmental protection and the like.

At present, silica gel foaming gaskets are all composed of single components, and the silica gel foaming gaskets composed of the single components have the problem that the silica gel foaming gaskets cannot effectively resist impact with large impact force.

Disclosure of Invention

The invention aims to provide a silica gel foaming gasket to solve the technical problems.

In order to achieve the above purpose, the present invention adopts the following technical solutions to achieve the technical problems solved by the present invention:

the utility model provides a silica gel foaming gasket, includes first silica gel layer, second silica gel layer and third silica gel layer, wherein, the third silica gel layer by first silica gel layer with second silica gel layer is made through the foaming reaction, the third silica gel layer is located as the supporting layer first silica gel layer with the effect of alleviating the impact is played in the centre on second silica gel layer, the thickness on third silica gel layer is less than first silica gel layer or the thickness on second silica gel layer.

Optionally, the first silica gel layer is obtained by reacting a raw material a and a raw material B, wherein the raw material a comprises the following main components: 70 to 85 portions of functional silicone oil, 5 to 10 portions of methyl silicone oil, 5 to 10 portions of vinyl silicone oil, 0.5 to 1 portion of catalyst, 0.5 to 1 portion of foaming agent, 0.5 to 1 portion of pigment and 1 to 10 portions of reinforcing filler; the main components of the raw material B are as follows: 50-70 parts of functional silicone oil, 5-10 parts of vinyl silicone oil, 10-30 parts of cross-linking agent, 0-5 parts of pigment and 5-10 parts of reinforcing filler; the second silica gel layer is mainly obtained by reacting a raw material C and a raw material D, wherein the raw material C mainly comprises the following components: 60-70 parts of functional silicone oil, 5-10 parts of methyl silicone oil, 1-5 parts of catalyst, 5-10 parts of foaming agent, 0.5-1 part of pigment and 1-10 parts of reinforcing filler; the main components of the raw material D are as follows: 60 to 80 portions of functional silicone oil, 10 to 30 portions of vinyl silicone oil, 1 to 5 portions of cross-linking agent, 0 to 5 portions of pigment and 5 to 10 portions of reinforcing filler.

The first silica gel layer and the second silica gel layer both contain vinyl silicone oil components, and the compatibility of the first silica gel layer and the second silica gel layer can be increased during temperature reaction, so that the third silica gel layer with uniform properties can be formed better.

Optionally, the thickness of the third silica gel layer is 1.0mm to 1.5 mm; the thickness of the first silica gel layer or the second silica gel layer is 1.5 mm-1.8 mm.

Optionally, the generation temperature of the third silica gel layer is 40-60 ℃, and the reaction time is 10-30 s.

Optionally, the first silica gel layer or the second silica gel layer is prepared by dispensing through a dispenser.

Optionally, the dispensing process includes conveying the raw material a of the first silica gel layer to a glue passage a of the dispenser, and conveying the raw material B to a glue passage B of the dispenser; starting the dispenser, enabling the machine head to move in a snake shape along a preset track, and extruding a raw material A of a glue channel A in the dispenser and a raw material B of a glue channel B of the dispenser onto a bearing body of the silica gel foaming gasket to form a first silica gel layer blank; conveying the component raw material C of the second silica gel layer to a glue channel A of a glue dispenser, and conveying the component raw material D to a glue channel B of the glue dispenser; and starting the dispenser, enabling the machine head to move in a snake shape along a preset track, and extruding the raw material C of the glue channel A in the dispenser and the raw material D of the glue channel B in the dispenser onto the first silica gel layer blank to form a second silica gel layer blank.

Optionally, the dispensing parameters in the dispensing process are as follows: the walking speed is 1m/min to 10m/min, the glue-spraying amount of the machine head is 0.5g/s to 3.0g/s, and the width of the glue line is 0.5mm to 5 mm.

Optionally, the density of the first silica gel layer or the second silica gel layer is 0.28g/cm³～0.38g/cm³The density of the third silica gel layer is 0.19g/cm³～0.27g/cm³The compression deformation rate of the first silica gel layer, the second silica gel layer or the third silica gel layer is 1.5-3.0%.

Optionally, the aperture ratio of the third silica gel layer is 80% to 90%, and the aperture ratio of the first silica gel layer or the second silica gel layer is 60% to 70%. The silica gel foaming gasket is provided with the vent hole, so that air can flow in the gasket, and the silica gel foaming gasket can further release the internal air when being impacted.

Has the advantages that: due to the adoption of the technical scheme, the prepared foaming gasket has good impact resistance when being applied to parts such as a buffer device and the like, and the service life is prolonged.

Detailed Description