The main reasons are:
Fabric problem: The cloth surface is not cleaned sufficiently after pre-treatment or dyeing, and there are additive residues on the cloth surface.
Problems with working fluid: Dosage problem, the concentration of wet cloth is higher than that of dry cloth; stability, whether there is hydrophilicity or the compounding of anionic additives affects its waterproofing effect; whether the pH value is reasonable, the potential of the fabric is affected by the pH of the solution value, attention should be paid to adjusting the reasonable pH value.
Cloth surface liquid-carrying rate: Too fast setting speed and poor permeability can easily lead to insufficient cloth surface liquid-carrying rate, resulting in poor waterproofing effect. Therefore, the appropriate working fluid concentration and cloth surface liquid-carrying rate should be selected based on laboratory samples before using the machine. Rate.
Processing conditions are not in place: improper selection of waterproofing agent, improper selection of baking temperature or time results in unsatisfactory results. Generally, the surface temperature of fabrics for waterproofing processing needs to be above 140 degrees to prevent the performance from being fully exerted, thereby achieving the ideal waterproofing effect.
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