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Insulating tape and preparation method thereof

A technology of insulating tape and manufacturing method, which is applied in the direction of adhesive, film/sheet adhesive, etc., can solve the problems of complicated production process of insulating tape, damage to insulating coils of insulation grade, and high equipment requirements, and achieves the effect of ultraviolet rays and ozone. Stabilization, improvement of stability and heat resistance, effect of heat resistance improvement

Inactive Publication Date: 2011-03-23
常州俊科绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are roughly two types of self-adhesive rubber insulating tapes, one is a high-voltage insulating rubber tape made of two kinds of rubber sheets, which is divided into an elastic insulating layer and an adhesive layer, and the other is mainly made of butyl rubber. Most of these two types of tapes have the defects of complicated preparation process and high energy consumption. In addition, this type of tape is prone to hardening and loss of stickiness under long-term high temperature environment.
Silicone rubber has been widely used in the manufacture of insulating materials in recent years due to its high temperature resistance of up to 380 ° C. At present, most of the domestic use of calendering method to manufacture pure silicone rubber insulating tape, used in generators and some electronic components, etc., but Pure silicone rubber can only withstand the high temperature of 380°C in a short period of time. With the increase of time, its insulation level will decrease and cause the damage of the insulating coil, so the service life cannot be extended. Some environments with high working temperature, the existing technology Insulating tape does not meet the requirements
Insulation tapes are produced by compound calendering technology of silicone rubber and glass fiber cloth in foreign countries, which can withstand higher temperatures. However, the production process of this insulation tape is complicated, the equipment requirements are high, the product specifications are limited, and it is difficult to promote.

Method used

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  • Insulating tape and preparation method thereof
  • Insulating tape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The insulating tape of this embodiment is made of 2551-type glass fiber cloth coated with insulating adhesive material on both sides, and the insulating adhesive material component and weight ratio are silicone rubber 110-2: 65%, silicone rubber 107: 12.5%, Boric acid: 1.5%, white carbon black A200: 15%, hydroxy silicone oil GY2009-3: 2%, ferric oxide: 2%, vulcanizing agent: 2%, and the remaining solvent is xylene.

[0028] 1) Preparation of micelles: Mix 3750g of silicone rubber 107 and 450g of boric acid, put them in two trays, and place them in the upper and lower layers of the oven for baking respectively. The baking is divided into five consecutive temperature changing periods, which are 75°C, 50min——10°C , 60min——150°C, 70min——180°C, 70min——turn off the power and keep warm for 50min, and the upper and lower layers of micelles should be stirred and mixed evenly in the gap between each time period;

[0029] 2) Mixing: mix the micelles with 19,500g of silicone rubber...

Embodiment 2

[0039] The insulating tape of this embodiment is made of 2551-type glass fiber cloth tape coated with insulating adhesive material on both sides and compounded. The components and weight ratio of the insulating adhesive material are silicone rubber 110-2: 73%, silicone rubber 107: 12%, Boric acid: 1%, white carbon black A200: 10%, hydroxyl silicone oil GY2009-3: 1%, ferric oxide: 1.5%, vulcanizing agent BP: 1.5, and other solvents are xylene.

[0040] The operating steps are the same as in Example 1.

[0041] Verification results The self-adhesive strength is 102N, the minimum radial tensile strength is 105N / mm, the minimum radial edge tear strength is 7.8N, and the minimum breakdown voltage (at room temperature) is 38kv / mm.

Embodiment 3

[0043] The insulating adhesive tape of this embodiment is made of 2551-type glass fiber cloth tape coated with insulating adhesive material on both sides and compounded. The components and weight ratio of the insulating adhesive material are silicone rubber 110-2: 70%, silicone rubber 107: 14%, Boric acid: 1%, white carbon black A200: 10%, hydroxyl silicone oil GY2009-3: 1.5%, ferric oxide: 2%, vulcanizing agent BP: 1.5%, and the remaining solvent is xylene.

[0044] The operating steps are the same as in Example 1.

[0045] Verification results The self-adhesive strength is 105N, the minimum radial tensile strength is 108N / mm, the minimum radial edge tear strength is 8N, and the minimum breakdown voltage (at room temperature) is 42kv / mm.

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Abstract

The invention discloses a silicone rubber insulating tape and a coating-method production process thereof. The insulating tape is manufactured by combining glass fiber cloth belts with two sides coated with insulating viscous materials. The insulating viscous materials comprise the following components in part by weight: 65 to 75 parts of silicone rubber 110-2, 8 to 14 parts of silicone rubber 107, 1 to 2 parts of alkaline acid, 10 to 18 parts of white carbon black A200, 1 to 4 parts of hydroxy silicone oil GY2009-3, 1 to 4 parts of ferric oxide, 1 to 4 parts of vulcanizing agent, and the balance of xylene serving as a solvent. The insulating tape has advantages in the aspects of high-temperature resistance and ageing resistance, and instead of the conventional calendaring process, the process for coating silicone rubber paste on the glass fiber belts is adopted to simplify production process, reduce energy consumption and consequently reduce production cost.

Description

technical field [0001] The invention belongs to the field of insulating materials, in particular to a self-adhesive insulating tape suitable for large generators or high-voltage motors and induction coils of electric furnaces. Background technique [0002] At present, there are roughly two types of self-adhesive rubber insulating tapes, one is a high-voltage insulating rubber tape made of two kinds of rubber sheets, which is divided into an elastic insulating layer and an adhesive layer, and the other is mainly made of butyl rubber. Most of these two types of tapes have the defects of complicated preparation process and high energy consumption. In addition, this type of tape is prone to hardening and loss of stickiness under long-term high temperature environment. Silicone rubber has been widely used in the manufacture of insulating materials in recent years due to its high temperature resistance of up to 380 ° C. At present, most of the domestic use of calendering method to...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J7/04
Inventor 郁进岳
Owner 常州俊科绝缘材料有限公司
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