What material is silicone? What glue should be used for bonding?

Silica gel is a highly active adsorption material. It is an amorphous substance, insoluble in water and any solvent, non-toxic, tasteless, and chemically stable. It does not react with any substance except strong alkali and hydrofluoric acid. You must have understood what kind of material silicone is after reading the editor’s brief description! Xiaomian and the editor will take a look at what kind of glue should be used to bond silicone!

1. Things that need to be clarified before choosing silicone glue

1. Determine the materials

First, determine the specific materials to be bonded. For example (silica gel, silicone rubber, whether it is well formed) or it sticks to other materials, such as: sticking to metal, sticking to plastic, sticking to silicone, etc.

2. Determine the size of the bonding area

    Determine the size of the bonding surface of the material. If it is a small area, you can use instant glue, which has strong adhesion and can be destructive; if the bonding surface is large, use slow-drying silicone glue, which will give you enough time to operate the glue. The cost will also be much lower than instant glue.

3. Determine specific bonding requirements

After the bonding material and area size are determined, the bonding requirements need to be determined, such as: bonding speed, glue color, glue viscosity, high and low temperature resistance, bonding strength, etc. and specific requirements in this regard.

2. Commonly used types of silicone glue

1. Slow-drying glue for normal temperature bonding

Slow-drying type: 6-8 hours to reach 90% strength, and it takes 24 hours to fully cure. This glue, after curing, is as soft, elastic, waterproof, high temperature resistant, acid and alkali resistant, and tensile resistant as the silicone itself. force and other effects.

2. Quick-drying glue for normal temperature bonding

Quick-drying type: When bonding silicone to silicone, you must first use a treatment agent to treat the surface of the silicone material to be bonded. The treated silicone material needs to dry for about 1-5 minutes, and then apply glue. After bonding, the bonded products must be left for 24 hours before high and low temperature tests, tensile tests, etc. can be performed.

3. High temperature bonding

High temperature resistant glue: After applying the glue, place it in the oven and bake it at 80-90 degrees for about 1 hour. The bonded product will be soft, elastic, waterproof, high temperature resistant, acid and alkali resistant, etc.