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What are the factors related to the deep curing of silicone adhesive

What are the factors related to the deep curing of silicone adhesive

(Summary description)Silicone adhesives are used in electronic products to seal, fix, fill, etc., but to play its performance role, the entire colloid must be fully cured. It is necessary to ensure that the silicone adhesives are normally and fully cured, then the deep curing In the process, some influencing factors need to be avoided. Today, the editor will explain to you the factors that affect the deep curing of the adhesive.

What are the factors related to the deep curing of silicone adhesive

(Summary description)Silicone adhesives are used in electronic products to seal, fix, fill, etc., but to play its performance role, the entire colloid must be fully cured. It is necessary to ensure that the silicone adhesives are normally and fully cured, then the deep curing In the process, some influencing factors need to be avoided. Today, the editor will explain to you the factors that affect the deep curing of the adhesive.

Information

Silicone adhesives are used in electronic products to seal, fix, fill, etc., but to play its performance role, the entire colloid must be fully cured. It is necessary to ensure that the silicone adhesives are normally and fully cured, then the deep curing In the process, some influencing factors need to be avoided. Today, the editor will explain to you the factors that affect the deep curing of the adhesive.

1. Sizing humidity

The silicone adhesive described here is a one-component condensation type silicone adhesive. The curing process requires the use of moisture in the air to carry out the condensation reaction. If the lack of moisture or too low moisture, it will lead to the speed of the condensation reaction. Slow down, resulting in failure to cure in the required time. For example, at 55% humidity, the 24H deep curing thickness is 4-5mm. Since the on-site environmental humidity is only 30%, the curing depth will not reach 4-5mm. If the sizing thickness is required If it is 4mm, it will not be able to form preliminary.

2. Sizing thickness

The curing process of the silicone one-component adhesive requires several stages of surface drying, skinning, deep curing, preliminary overall curing, and complete curing. Under the same environmental conditions, the thicker the thickness of the sizing, the time to complete the curing stage The longer it is, it mainly takes time for deep curing. The thicker it is, the more difficult it is for the internal liquid glue to contact air, and the curing time will be prolonged. Therefore, the same type of product, the same environment, different sizing thickness, the required curing time is also Different.

Three, colloidal properties

Gel performance, here is the curing speed or strength, generally the faster the surface drying speed, the stronger the curing strength of the adhesive, the overall curing speed will be relatively fast, so generally when choosing a fast-curing silicone adhesive , You can refer to the selection based on the surface drying time and the speed of the skinning time.

Therefore, it is very important to understand the significance of the deep curing of the silicone one-component adhesive, which can avoid and prevent the phenomenon that the internal colloid does not cure when the product reaches the end customer. Several key control times in the curing stage of the adhesive as described above,

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