The wetting agent on the surface of cement cloth will have a certain adverse effect on the adhesion of polyurethane resin coated with glass fiber belt. The cement cloth can be cured by post-treatment and coated with suitable coupling agent to improve the adhesion between glass fiber and polyurethane resin.

Polyurethane resin configuration requirements

Polyurethane coating felt coating must first be harmless to human body, for the green environmental protection coating, in line with the requirements of the national health law; Secondly, the curing time after the bandage is opened must be met and strictly controlled within 5 to 8 minutes, so that the medical staff can bandage the patient within the specified time. Again, the concentration of coating and content of polyurethane resin should be controlled reasonably, because this concerns the fluidity of polyurethane resin, uniformity and product permeability (should accord with the respiration of human body skin and metabolism), improper control will affect the product strength and waterproof performance.

Coating, sealing anti - wet treatment

The post-treated fiberglass bandages are coated with a prepared polyurethane coating and then bagged and sealed. Through special technological means, the bandage in the sealing pocket is always kept in a certain degree of dryness, so that the coating layer tends to be more uniform, which is very important to stabilize the quality and shelf life of the bandage.