What are the reasons lead to poor water repellent?

The concrete manifestation of poor water repellent: poor water drops, even the fabric is wet.

 

The reasons:

 

① The sizing agent on the gray fabric is not washed clean,and also not washed clean after dyeing, there is still surface active agent on the fabric.

 

② The amount of water repellent agent is too little, the rate of absorption is low, and the speed of dyeing machine is rapidly.

 

③ The gray fabric is not completely dry.

 

④ The curing temperature is too low, reduce the water repellent agent crosslinking.

 

The prevention method:

 

① Washing the gray fabric completely, No impurity.

 

② Increase the water repellent agent, use different absorption rate for different fabric, the speed of machine should be less than 24m/min.

 

③ Process the water repellent finishing after dyeing, determine the suitable technology.

 

④ Follow to the technology strictly.

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