Alkaline problem
Cotton fabrics are usually pre-treated with a higher concentration of alkali to remove fabric impurities (especially the amount of mercerized alkali is larger), and alkali is not easy to wash when it enters the fiber, and alkali is also added when dyeing (reactive vat dyes), so in The surface of the cloth may be alkaline during finishing. However, chemical fiber fabrics must undergo reduction cleaning after dyeing. At present, printing and dyeing factories are still using hydrosulfite and caustic soda for cleaning. Ordinary silicone oil is not resistant to alkali and will break emulsion under alkaline conditions. Therefore, the soft cloth surface must be washed with alkali to keep the pH in a neutral range.

Cohesion problem
On fabrics containing short fibers (cotton cloth, T/R cloth, velvet), it is inevitable that some short fibers will fall off during the processing, and the short fibers falling from the cloth will cohere with ordinary silicone oil. The demulsified silicone oil sticks together, forming sticky rolls or spots. When the water quality is relatively poor, it will also condense with ordinary silicone oil to produce sticky rollers, and a similar situation will also exist in fluffy fabrics.

Sticking cylinder problem
When softening, ordinary silicone oil will stick to the cylinder wall. After a long time, some black oil spots will form on the cylinder wall, and silicone oil spots will form on the cloth surface.

Feel problem
Due to the higher and higher requirements for the hand feel of fabrics in the market, and various fabrics need to show various style requirements due to different seasons and different customer requirements. Some require smooth drape, slippery and flexible, and fluffy. Soft, purely elastic, etc. A silicone oil generally can only reflect one style.

Yellowing problem
Heat Yellowing:
A longer period of shutdown during operation causes the fabric to remain yellow and the amino hydrogen of amino silicone oil is easily oxidized by air to form a chromophore, resulting in yellowing. The product turns brown, and the brown color makes white fabrics look like they've lost their most basic whiteness or are simply yellowed. If the pH is too high, the accompanying substances of the cotton fabric will turn yellow when the drying temperature is too high.

Cost issue
At present, the most confusing problem for printing and dyeing factories is the cost problem. Due to the rising prices of water, electricity and gas, but the printing and dyeing processing fees are not high, many printing and dyeing factories have been busy for a year without much profit. Therefore, cost control is the most important thing for printing and dyeing. problems to be solved by the factory. The cost of finishing auxiliaries is a big part of printing and dyeing factories, so reducing the cost of finishing auxiliaries is an urgent problem for printing and dyeing factories to solve.

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