How to operate hot vulcanized silicone adhesive with high efficiency

Whether it is the leather shoes that people wear on their feet today, or the car forums that are speeding on the road, the main material is rubber products. Although there are still some natural rubbers on the market today, many more products are actually made of composite materials. There are too many rubber products on the market, and in addition to some other materials, there is one ingredient that is indispensable, that is, hot melt adhesive film materials.

So which kind of hot melt adhesive film product is used for rubber materials, and why should you choose it? What are the characteristics of rubber materials? Although there are some differences between synthetic rubber and artificial rubber, they are generally similar in terms of composition, and they are basically a material with latex as the main component.

This material has very good abrasion resistance and elasticity, but at the same time has a relatively poor high temperature resistance ,...

The use of hot vulcanized silica gel glue is as follows:

Alcohol cleaning of hard metal, plastic, epoxy resin, tempered glass and other substrates, preparation of CL-26AB glue, and then glue on the surface of the plastic substrate;

Hot vulcanized silicone plastic molding, bonding, molding, bonding in a liquid silicone injection molding machine. Suitable for nylon, PC, PET, PP, PBT, PPSU, etc., corona or flame treatment of plastic materials in advance can strengthen the bonding effect; Suitable for stainless steel, aluminum alloy, metal plating and other materials.

1. The hair dryer can be used to deal with the sticky silica gel, that is, turn on the cold air stall of the hair dryer and blow on the sticky silica gel for more than ten minutes to make it dry quickly. The dried silica gel is hard as a whole, and the surface is dry and smooth, and the hair dryer drying can effectively deal with its sticky state. 2. Talcum powder treatment: Silicone sticky can be treated with talcum powder.

This kind of ** is to clean the silicone, use a paper towel to absorb the surface moisture, and then sprinkle talcum powder on the silica gel, or directly put the silicone into the talcum powder box and roll Sun Shen until the surface of the silica gel is stained with a layer of talcum powder, which can effectively solve the sticky situation. 3. Precautions Silicone products and organotin compounds, sulfides, etc. are placed together, which will produce denaturation reactions and become sticky, so avoid placing silica gel and them together in daily life. In addition, the softer the silica gel, the easier it is to get sticky, and when the silica gel gradually softens, it is better to cure it as soon as possible.

Summary. The amount of vulcanizing agent added to the silica gel raw material can be appropriately increased, or the rapid vulcanizing agent can be selected to speed up the vulcanization speed of silica gel products and shorten the molding time. It is possible to increase the vulcanization temperature at the time of molding, but the structure of the product is different, so the specific temperature needs to be determined by testing.

Change the nesting method of the silica gel raw material, and try to make the mold as much as possible in the process of pressurization, and the silicone raw material can cover the entire inner wall of the mold as much as possible. Change the number of vents and the vent stroke.

It can be buried to appropriately increase the amount of vulcanizing agent added to the silica gel raw materials, or to choose a rapid vulcanizing agent, so as to speed up the vulcanization speed of silica gel products and shorten the molding time. It is possible to increase the vulcanization temperature at the time of molding, but the structure of the product is different, so the specific temperature needs to be determined by testing. Change the discharging method of silicone raw material Li or ant, and try to make the mold in the process of pressurization, and the silicone raw material can cover the entire inner wall of the mold as much as possible.

Change the number of vents and the vent stroke.

According to common sense, the larger the exhaust stroke, the more times the hand is discharged, which will be conducive to exhausting. But this is not the case, it is necessary to decide the aging according to the structure of the product, and some silicone products have a large exhaust stroke, but there will be bubbles and other problems. The operator accelerates the operation speed and minimizes the out-of-mold time, so as to stabilize the temperature of the silicone product mold and increase the vulcanization rate of the silicone product.

Glue YH-840 for cold bonding metal and silicone

High temperature resistant silicone adhesive, suitable for thermal bonding there are 2 kinds, 170 high temperature solid silicone adhesive glue CL-24 high and low temperature resistance range between -60 and 220, customized 24CW series high temperature resistance limit 280; 90 to 130 Medium temperature viscous liquid silica gel hot vulcanized glue temperature resistance -60 to 200. Rubber rollers, kitchen utensils, electrical fittings, etc. are all molded and integrally formed.

There is also RTV silicone glue in the high-temperature adhesive, which is suitable for molding silicone sheets, pads, mutual bonding or composite bonding with metals (powder metallurgy, stainless steel, aluminum alloy, iron, copper) and other materials, and at the same time has a good bonding effect on high-temperature resistant nylon, bakelite, epoxy resin, ceramic, glass and other materials.

The use of hot vulcanized silica gel glue is as follows

Alcohol cleaning of hard combustible metal, plastic, epoxy resin, tempered glass and other substrates, preparation of CL-26AB glue, and then glue on the surface of the plastic substrate;

Hot vulcanized silicone plastic molding, bonding, molding, bonding in a liquid silicone injection molding machine. Suitable for nylon, PC, PET, PP, PBT, PPSU, etc., the bonding effect can be strengthened in advance for the corona of plastic materials or flame treatment stoves; Suitable for stainless steel, aluminum alloy, metal plating and other materials.

The production of high-temperature vulcanized silicone rubber is carried out in two stages:

The first stage: the silica raw rubber, reinforcing agent, additives, vulcanizing agent and structure control agent are mixed, and then the compound is heated and vulcanized under pressure in a metal mold with a pressure of about 50 kg cm2, a temperature of 120 130, and a time of 10 30 minutes.

The second stage: after the silicon rubber is taken out of the mold, it is placed in the oven and baked at 200 250 for several hours to 24 hours, so that the rubber is further vulcanized, and the organic peroxide is decomposed and volatilized.

The side groups on the silicone rubber backbone can be methyl, ethyl, vinyl, phenyl, trifluoropropyl, etc. The most commonly used methyl group is the methyl group, but other groups can also be introduced to improve processability and other properties. Therefore, depending on the side group and rubber formulation, a variety of silicone rubbers for different purposes can be obtained.

Generally, it can be divided into the following types:

General purpose (with methyl and vinyl), high and low temperature (with phenyl, methyl and vinyl), low compression set (with methyl and vinyl), low shrinkage (with volatile matter) and solvent resistance (fluorosilicone), etc.

The production of silicone rubber rollers is often made of solid and liquid silica gel bonded with zinc alloy, aluminum alloy and other metal mandrel under the action of hot vulcanized glue. High temperature hot vulcanized glue, CL-24W is suitable for 170 grade rubber compounds bonded to metal rod cores in flat vulcanizing machines. The recommended temperature range for high-temperature rubber rollers is -60 to 350

There are two kinds of silicone rollers formed by medium temperature vulcanization: bisditetravulcanized solid silicone rubber or platinum catalyzed liquid silicone rubber. CL-26AB glue needs to be prepared and used after adjusting the ratio of A glue and B glue as needed. After bonding, the temperature resistance of the rubber roller is in the range of -60 to 300