Analysis of reasons and countermeasures for poor initial waterproof performance of fabrics in oil- and water-repellent finishing

Tag:

Oil- and water-repellent waterproof fabric functional fabric

Reason:

Through experiments, it is believed that initial waterproofing occurs There are three main reasons for poor performance:

1. Processed cloth: scouring or dyeing cloth is not cleaned enough, and scouring agent, leveling agent, etc. remain on the cloth. Dispersants, penetrants and other additives.

2. Problems with working fluid: The concentration is improperly used or the concentration changes during processing, or the working fluid is affected by mechanical stirring, temperature, mixing chemicals, etc., and is unstable. The performance is affected; or the working fluid preparation sequence is improper.

3. Reasons related to processing conditions: improper selection of waterproofing agent, or insufficient and uneven drying and baking conditions.

The main countermeasures to solve the above problems can start from the following aspects:

1 . Before waterproof processing, the processed cloth should be fully washed.

2. Choose a waterproofing agent suitable for processing fibers, and replenish newly prepared working fluid as much as possible during processing. Strengthen the temperature management of processing cloth to prevent the hot cloth from directly entering the studio after drying. Understand the compatibility of the blended chemicals and prepare the working fluid according to the mixing sequence. When other additives are diluted with warm water, they need to be cooled before adding the waterproofing agent. The prepared working fluid must be used within 24 hours.

3. The drying and baking temperatures should be uniform, and the baking temperature should not be too low, generally above 140°C.

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