The functional requirements of silicone foam adhesive joints are various. Generally, silicone foam includes mechanical strength, heat resistance, oil resistance, water resistance, electrical conductivity and other characteristics, as well as functional requirements for environmental stress resistance. The adhesive selected must also have corresponding functions. The following introduces the relevant adhesives according to the typical functional requirements of silicone foam.
1. Mechanical strength of silicone foam

Such adhesives should have good mechanical strength, including tensile strength, shear strength, and peel strength. The commonly used adhesive is epoxy resin adhesive, but its peel strength is poor. If you choose epoxy-Nitronitrile glue and phenolic-Nitronitrile glue, you can get satisfactory results. In the repair of machine tool guide rail wear, wear-resistant adhesives are needed. AR-5 wear-resistant glue can be used, and its hardness reaches 11.8HB. It is composed of epoxy resin and inorganic fillers, and requires higher shear strength and lower peel strength for plastic carpets and adhesives for beverage bottle labels.

2. Silicone foam heat resistance

Generally, the long-term use temperature of polymer adhesives is below 200°C. However, in some special uses of silicone foam materials, the long-term use temperature is required to be above 200°C. For example, the adhesive in microelectronic components should be bonded to the base material at 400°C in an inert atmosphere; the structural adhesive used in supersonic flight requires tens of thousands of hours of use at 230°C; Maintain mechanical properties for more than 1min at °C. These are special adhesives for special purposes.
3. Silicone foam oil resistance

The bonding of oil pipeline joints and parts in lubricating oil requires the adhesive to be bonded in an oily and humid environment, and to obtain sufficient strength without surface treatment.

4. Water resistance of silicone foam

Generally, polar adhesives are more hydrophilic, and the strength of the joint will drop sharply in a humid environment.

5. Optical properties of silicone foam

In addition to having a certain bonding strength, the glue used for optical parts must also meet the requirements of light transmittance, which is generally above 90%.

6. Other functions

The functional requirements of adhesive joints are diverse, such as electromagnetic, acoustic and physiological effects.



About silicone foam, please check the details:
https://www.siliconefoam.net/product-soft-cellular-silicone-iota-ht-870-.html