How to solve the problem that the mold silicone rubber does not cure?

When making silicone molds, due to some reasons, the mold silicone has not been cured for 24 hours.

Today we will analyze how to control the ratio of silicone to curing agent to avoid non-curing.

Mold silicone curing will be affected by temperature, high temperature will cure faster, on the contrary, low temperature will slow curing speed,

so when making silicone molds when the winter weather is about to change the ratio of silicone and curing agent To ensure the normal curing of silica gel.

The greater the amount of curing agent added, the faster the reaction speed of silica gel, and the ratio of curing agent to silica gel should not be less than 1%.

If the amount of curing agent added is too small, it will not cure for a long time. Adding no more than 5% of the curing agent will generally not have much effect on the hardness,

tensile force and tear strength of the silicone.

The amount of curing agent is 1%, the colloid is still flowing in 2.5 hours, and the mold can be demoulded in 6-8 hours;

The amount of curing agent is 2%, the glue will still flow after 50 minutes to 1 hour, and it can be demoulded in 2-3 hours;

The amount of curing agent is 3%, the colloid is still flowing in 28-30 minutes, and the mold can be demolded in 1.5-2 hours.