Silicone rubber products for silicone rubber products frequently asked questions

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1 Why does the silicone rubber mold have fewer mold turns? Too much silicone oil is added in the process of making the mold, and the silicone oil destroys the molecular weight of the silica gel, so the mold will have a small number of mold turns and is not durable. If you make a small product with a more complex pattern, use the silicone with high hardness to open the mold, there will be a phenomenon of fewer mold turns, because the silicone will be brittle and easy to break when the silicone is too hard.

On the contrary, if you use silicone with low hardness to make molds for building products, the results will also be unsatisfactory. Because the silicone is too soft, its tensile force and tear strength will be reduced, and the mold will be deformed, so the number of mold turns will be reduced. The quality of the mold silicone itself is very good, and there is no good or bad silicone, only suitable and unsuitable.

This is not the case when it comes to using silicone that is suitable for the hardness of the product to make the mold. 2.Why does the silicone rubber mold have the phenomenon of mold burning?

Because the unsaturated resin and resin products are added with peroxide curing agent, a large amount of heat will be generated when the resin reacts, and the general resin curing time is 3 minutes, so it is necessary to demould as soon as possible after 3 minutes to prevent the phenomenon that the silicone mold will not produce mold burning. 3.Why does the mold silicone rubber appear to be dry on the surface and not dry on the inside?

Mold silicone is a condensation type of silica gel, it is solidified by absorbing water in the air, silica gel in the process of making, the water is evaporated, and the right amount of water is not transferred, there will be a phenomenon that the surface is dry and the inside is not dry. Solution: This phenomenon does not belong to the product quality problem, but because there is no control of moisture, improve the storage period of silica gel, and the shelf life will only appear for a long time.

4.Why does the mold silicone rubber have poor tensile strength? Because in the process of making the mold, in order to reduce the viscosity of the silica gel and make the silica gel easy to operate, a large amount of silicone oil is added to the silica gel, which will make the silica gel very soft, resulting in the phenomenon of no tensile resistance, reduced tear strength and poor tensile force, resulting in the phenomenon that the mold is not durable, the service life is short, and the number of mold turning is less.

5.Why does the mold silicone rubber have oil condition? The mold silicone itself will not be oily, and the oil is because of the addition of composite silicone oil (a compound and ligand of silicone oil and white mineral oil) during the operation, because white mineral oil is a petrochemical product, not silicone oil.

6.Why does the mold produce the phenomenon of not being resistant to acid and alkali and aging? In the process of making silicone molds, it is recommended that customers should not add any silicone oil, and if necessary, the amount of silicone oil should not exceed 5% 10% at most.

Because too much silicone oil will destroy the molecular weight of silica gel, the mold will be resistant to acid and alkali and aging.

Not a substance.

Silicone rubber: Among the many synthetic rubbers, silicone rubber is the best among them. It is odorless and non-toxic, not afraid of high temperatures and resistant to severe cold, at 300 degrees Celsius and zero.

When it is 90 degrees Celsius, it is "calm" and "the face does not change color", and it still does not lose its original strength and elasticity. Silicone rubber also has good electrical insulation, oxygen resistance, aging resistance, light resistance, aging resistance, mildew resistance, chemical stability, etc.

Because of these excellent properties, silicone rubber has played an important role in modern medicine. In recent years, hospitals, scientific research institutes and factories have worked together to successfully trial-produce a variety of silicone rubber medical supplies.

The main component of silica gel is silica, which is chemically stable and does not burn. When silicic acid is generated in water, it is gelatinous, called silicate colloid, and after being filtered out, it loses water in the air and becomes a dry gel of silicic acid, referred to as silica gel.

Note: The non-strict name of the silicone rubber industry is also referred to as silicone rubber for silicone. But chemically they are definitely not the same.

Dear, I will answer for you, <>

Are silicone rubber and silicone the same thing? Answer: The nature of filial piety is different.

1. Silicone rubber: leakage imitation is a rubber with two organic groups on the main chain composed of silicon and oxygen atoms alternately, and the silicon atoms are usually connected with two organic groups. 2. Silicone:

It is a highly active adsorption material, which is an amorphous revertent fiber substance. The characteristics are different. 1. Silicone rubber:

Silicone rubber has good low temperature resistance and can generally work at -55; Silicone rubber has good air permeability and the highest oxygen permeability rate among synthetic polymers. 2. Silica gel: Silica gel has a strong adsorption capacity and can have a drying effect on people, so work clothes should be worn during operation.

Silicone and silicone rubber in addition to the name is different, the important thing is that they are indeed two concepts, two different substances, from the silicone alone, you can see silicone products everywhere in life, at present, silicone products are very popular in Europe and the United States, and they have begun to be slowly accepted by consumers in China, these silicone products are mainly reflected in silicone silicone kitchenware, silicone daily necessities, and these are our commonly used daily necessities, such as silicone pacifiers, there are more high-end silicone baby bottles, Medical-grade silicone products and the like.

Silicone rubber contains silicone products and rubber products, rubber products and silicone products are very different, the rubber products we mentioned here refer to synthetic rubber products, mainly by natural rubber to add certain chemicals, to form solid rubber raw materials, and finally to obtain rubber products.

Silicone rubber has a large static electricity and is easy to absorb air impurities, so in the silicone rubber industry, it is generally less than can be directly let go, and how to solve the problem of impurities is as follows:

1. The mixing and forming workshop was changed to a dust-free workshop (high cost).

2. Blow the dust at the box first, and then blow the dust of the PE bag after unpacking;

3. Clean the mixer before mixing (the left and right baffles, chassis, including hands should be cleaned);

4. The molding machine must be clean;

5. After the material is mixed, it is wrapped in a plastic bag and sent to the molding workshop;

6. When using materials, take a little bit (your hands must be clean when taking materials) I think it would be much better if you do the above well, I tell you, it is impossible to have nothing at all, unless you are a dust-free workshop.

It means that the production process is not up to standard, or the workshop conditions are poor, and there will generally be no impurities. You can visit the production workshop of Betley, which is more standardized.

The exclusion of rubber compounds and vulcanizing agents should be the problem of the masterbatch, whether the black masterbatch is ground evenly, and whether there are impurities in the masterbatch!

Liquid silica gel: Silicon dioxide and sodium carbonate are heated at high temperatures to produce sodium silicate. Sodium silicate and hydrochloric acid are reacted to produce silicic acid and sodium chloride. The resulting silicic acid is dried to form a porous solid gel, which is silica gel.

Raw materials: sodium silicate, hydrochloric acid (silica (that is, sand) and sodium carbonate, and hydrochloric acid) Silica gel is a chemical and is not easy to buy in general places. But the snack packaging we eat has silicone desiccant in it, but it's solid.

If you want to buy one, ask the hardware store if there is one, or one of those places that buy and sell utensils.

Liquid silicone I don't have solid contact with me.

Due to the excellent comprehensive performance and good technical and economic effect of silicone rubber products, it has been widely used in aviation, aerospace, atomic energy, electrical appliances, electronics, instruments, automobiles, machinery, metallurgy, chemical industry, medical and health, and daily life. Silicone rubber products are biocompatible materials, so qualified silicone rubber products can be used as artificial organs, and can be used in the beauty industry and physiotherapy industry.

Two different materials. Ha ha.