Making method of non-inflammable self-adhesion insulation tape

Abstract

The invention relates to a making method of a non-inflammable self-adhesion insulation tape. The making method comprises the following steps: by making colored polytetrafluoroethylene dispersion resin, sieving the colored polytetrafluoroethylene dispersion resin after cold storage, then mixing with propellant as paste shape and finally making the insulation tape through the steps of curing, preforming, thrusting, rolling, removing the propellant and the like. The made non-inflammable self-adhesion insulation tape is excellent in comprehensive performance with limited oxygen index up to over 95 and has non-flammable property, volume resistance no less than 1 multiplied by 1, 017 ohm / cm, good insulating performance, good self-adhesion without use of pressure sensitive adhesive, reliable adhesion between tape layers and at a port, water absorption rate less than 0.01 percent and good moisture resistance. The insulation tape can be used within the temperature range of -65-250 DEGC for long time with the dielectric strength not less than 40kV / mm, can resist strong acid, alkali and oxidant, is an ideal insulating material and promotes the replacement of insulating materials of traditional electrician equipment with new generations.

Description

technical field [0001] The invention relates to an insulating tape, in particular to a method for making an incombustible self-adhesive insulating tape. Background technique [0002] Insulating tape specifically refers to the tape used by electricians to prevent leakage and insulate. It is suitable for wire connection and electrical insulation protection. At present, the insulating tape composed of polyvinyl chloride base tape and pressure-sensitive adhesive layer is widely used, but this kind of insulating tape has the following disadvantages: 1. The flame resistance of polyvinyl chloride is poor, and the flame retardant value is only 40; 2. Poor temperature resistance , The softening temperature is 80°C, and it begins to decompose and change color at 130°C; 3. Poor aging resistance, easy to autocatalyze decomposition, change color, and rapid decline in physical and mechanical properties and insulation properties. 4. It has certain chemical corrosion resistance, but it is ...

AI Technical Summary

Problems solved by technology

At present, the insulating tape composed of polyvinyl chloride base tape and pressure-sensitive adhesive layer is widely used, but this kind of insulating tape has the following disadvantages: 1. The flame resistance of polyvinyl chloride is poor, and the flame retardant value is only 40; 2. Poor temperature resistance , the softening temperature is 80°C, and it begins to decompose and change color at 130°C; 3. Poor aging resistance, easy to autocatalyze decomposition, change color, and rapid decline in physical and mechanical properties and insulation properties

4. It has certain chemical corrosion resistance, but it is quite unstable. 5. The pressure-sensitive adhesive is easy to age, causing the insulation layer to loosen

However, as an insulating tape, there are different color separation needs for different purposes, and PTFE is non-stick, so it is very difficult to color it.

The traditional method is to directly mix polytetrafluoroethylene dispersion resin and pigments to form colored polytetrafluoroethylene dispersion resins, but this method is unevenly mixed, resulting in agglomeration or uneven dispersion of any component of the resin and pigments. The product will form discontinuous resin network and partial concentration of pigment, which will directly affect the insulation performance of the finished product

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