1. Alkaline problem
Cotton fabrics are usually pre-treated with a higher concentration of alkali to remove fabric impurities (especially mercerizing alkali, which uses a larger amount). The alkali enters the interior of the fiber and is not easy to clean. Alkali must also be added during dyeing (reactive vat dyes), so in The cloth surface may become alkaline during finishing. Chemical fiber fabrics must be restored and cleaned after dyeing. Currently, printing and dyeing factories still use insurance powder and caustic soda for cleaning. If the subsequent cleaning is not clean, it will also cause the soft front fabric to be stained with alkali. Ordinary silicone oil is not resistant to alkali and will break emulsions under alkaline conditions. Therefore, the cloth surface must be washed with an alkali agent before softening to keep the pH in a neutral range.

2. Cohesion problem
On fabrics containing short fibers (cotton, T/R cloth, velvet), it is inevitable that some short fibers will fall off during the processing. The short fibers falling off the fabric will cohesion with ordinary silicone oil, and will interact with the silicone oil. The demulsified silicone oil sticks together, forming sticky rollers or silicon spots. When the water quality is relatively poor, it will also condense with ordinary silicone oil to produce sticky rollers. In addition, similar situations will also occur with velvet fabrics.

3. The problem of sticking to the cylinder
When softening, ordinary silicone oil will stick to the cylinder wall. Over time, some black oil spots will form on the cylinder wall, and silicone oil spots will form on the cloth.

4. Feeling problem
As the market has higher and higher requirements for the feel of fabrics, and various fabrics need to show various style requirements due to different seasons and different customer requirements, some require smooth drape, smooth and flexible, and fluffy. Soft, simply elastic, etc. A kind of silicone oil can generally only reflect one style.

5. Yellowing problem
Hot yellowing:
A long downtime during operation causes the fabric to remain and turn yellow, and the amino hydrogen of the aminosilicone oil is easily oxidized by air to form a chromophore, which causes yellowing. The product turns brown and the brown color makes the white fabric look like it has lost its essential whiteness or has simply turned yellow. The pH is too high and the temperature during drying is too high, causing the cotton fabric to turn yellow.

6. Cost issue
At present, the biggest problem that puzzles printing and dyeing factories is the cost issue. Since the prices of water, electricity, and gas are constantly rising, but the printing and dyeing processing fees are not high, many printing and dyeing factories have been busy for a year, but there is basically no profit. Therefore, cost control is the key to printing and dyeing. The problem that the factory needs to solve. The cost of finishing auxiliaries is a big part of the printing and dyeing factory, so reducing the cost of finishing auxiliaries is an urgent problem that printing and dyeing factories need to solve.

More details please click here.