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FAQ And Solution To Water Based Spray Adhesive
Mar 07, 2018


FAQ and Solution to Water Based Spray Adhesive


FAQ

Possible Causes

Solution

Weak or no initial bonding strength

Slow evaporation on adhesive

Change the working process

Temperature is so low that initial bonding strength is affected.

Adjust the temperature in working field.

The adhesive layer is so thick that causes slow drying speed.

Adjust the spraying amount based on the   correct operation.

The adhesive layer is so thin that causes shortage of gel.

Adjust the spraying amount based on the   correct operation

Failure to spray

Low air pressure

Adjust the air pressure to normal state, 2.5-8kg.

Spray nozzle is stuck by gel

Clean out the gel from the nozzle by wet towel or finger.

Malfunction of spray gun

Change or fix the spray gun.

Uneven spraying

Low air pressure

Adjust the air pressure to normal state,   2.5-8kg.

Malfunction of spray gun

Change or fix the spray gun.

Spray distance is too far.

Adjust the spray distance and angle.

Adhesive viscosity is too high

Add purified water to adjust the viscosity.

Too misty when spraying

Spray distance is too far.

Adjust the spray distance and angle.

High air pressure.

Lower the air pressure

Too scattered when spraying

Adjust the sector-like spraying method to straight-line one.

No air evaporation equipment

Install air evaporation equipment to   remove the unwanted mist.

defect of spray gun

Use spray gun with bigger nozzle.

Debonding with material partly stick together

 

 

Uneven spay causes pile-up of gel

Adjust the air pressure and distance of   spray gun, and spray evenly.

Uneven spray causes shortage of gel

Adjust the air pressure and distance of   spray gun, and spray evenly.

Bond without thoroughly drying (mainly occurs in winter and rainy season).

Bond the material after the adhesive   surface dries. It takes 2~3 min. Use oven in wet weather.

Stress is not put on all parts of the material.

Stress on the material evenly.

Bond after the best bonding timing.

Bond the material within the best bonding time.


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