What are the common quality problems in soft finishing?

(1) The soft finishing does not meet the appropriate hand feeling: soft finishing soft, with different customer requirements and different, such as soft, smooth, fluffy, soft waxy, slippery, dry slip, etc., can be selected according to different styles Different softeners.
For example, in the film, the structure of the softener film is different, and its softness, bulkiness, slippage, yellowing, and water absorption of the fabric are different; in the silicone oil, the different genes of the modified silicone oil are also different, such as The properties of amino silicone oil, hydroxy silicone oil, epoxy modified silicone oil, and carboxyl modified silicone oil are different.
(2) Yellowing of color: Generally, yellowing is caused by a certain structure of film and amino silicone oil on the amino group.
In the film, the cationic film is soft and good, feels good, and is easy to adsorb on the fabric, but it is easy to yellow, which affects the hydrophilicity. For example, the cationic film is converted into a soft oil essence, its yellowing will be greatly reduced, and the hydrophilicity will also be reduced. After improvement, such as cationic membrane and hydrophilic silicone oil composite material, or composite material with hydrophilic finishing agent, its hydrophilicity will be improved.
Anionic membranes or non-ionic membranes are not easy to turn yellow, and part of the membranes are not yellow, nor does it affect the hydrophilicity.
Amino acid silicone oil is currently the most widely used silicone oil, but because the amino group can cause discoloration and yellowing, the higher the ammonia value, the greater the yellowing. It should be replaced by low-yellow amino silicone oil or polyether modified, epoxy modified and other non- Yellow silicon oil.
In addition, cationic surfactants such as 1227, 1831, 1631 are sometimes used as emulsifiers in emulsion polymerization, and these emulsifiers can also cause yellowing.
Silicone oil emulsification. When the emulsifier is used differently, its "peeling effect" is different, which will cause peeling and light color under different conditions, and the color has changed.
(3) The hydrophilicity of the fabric decreases in the soft finishing:
Generally used in the use of membrane structure problems and the lack of water absorption genes after silicone oil film, as well as the decline caused by the closure of cellulose fibers, wool carboxyl groups, amino acid groups and other water absorption centers. In absorbents, anionic, non-ionic and hydrophilic membranes should be used as much as possible. Sexual silicone oil.
(4) Dark spots: The main reason is that the pretreatment of the fabric oil is not clean, the color of the oil is dark during dyeing, or the fabric is excessively foamed in the dye bath, foam, sweater, dye and other mixtures, or on the fabric Dark oil caused by defoaming slick, or dyed fabric on the tar in a steel bottle, or dye condensed into dark spots under different conditions, or excessive calcium and magnesium ions in the water and dye binding to the fabric and other reasons. For the pre-treatment, such as refining the oiling agent, the dyeing auxiliaries use low bubbles, no foaming additives, the defoamer is selected to be difficult to slick, the chelating agent is added to improve the water quality, and the soluble dispersant is added to prevent dye aggregation, in time Use cylinder cleaning agent to clean the cylinder cleaning tank.
(5) Light spots: The main reason is that the pretreatment is uneven, and the effect of some parts of the hair is not good, which leads to a certain degree of rejection, or rejection with dyes, or uneven use of calcium soap, magnesium soap or silk during pretreatment. Or semi-finished products dry unevenly, or insoluble powder, soda water and other solids on the surface of the cloth, or dyeing materials before dripping, or dyeing soft treatment, or dyeing with additive spots.
Similarly, treatments that need to be treated, such as enhanced pretreatment, pretreatment aids must not easily form calcium and magnesium soaps, and pretreatment must be uniform and thorough (this is the choice of the relevant refinery, penetrants, chelating agents, Filament penetrant, etc.), sodium sulfate, soda water, etc.
(6) Alkaline point:
The main reason is that the pretreatment after alkali (such as bleaching, mercerizing) is not clean or uniform, resulting in the generation of alkali spots, so it is necessary to strengthen the alkali pretreatment process.
(7) Softener stains:
There may be the following reasons:
1. The film material is not bad in the soft finishing, and there is a piece of softener adhering to the fabric;
2. The rear membrane material is too foamy, and the cloth and softener foam stains in the cloth cylinder; the water quality is poor, the hardness is too high, the water impurities and the softener are combined and agglomerated on the fabric.
3. In soft finishing, even some factories use hexasodium or sodium to treat water. These substances and water impurities form flocculants, which enter the soft treatment bath, causing spots and stains on the cloth surface;
4. Anionic materials for cloth, in soft processing, combine with cationic softener to form stains, or use cloth and alkali to coagulate the softener;
5. The structure of the softener is different, and some of the softener changes from the emulsified state to the slag adhesion to the adhesion to the fabric at a higher temperature.
6. The original tar softener falls off the cylinder and other substances, and adheres to the fabric.
(8) Silicone oil stains in soft finishing:
1. This is the most difficult type of plaque to deal with, the main reasons are:
2. The pH value of the cloth surface is not neutral, especially compared with alkali, which causes silicone oil to damage the milk drift oil;
3. The quality of the treated bath water is too poor and the hardness is too high. Silicone oil is easy to slick when the water hardness is greater than 150PPM;
The quality problems of silicone oil include poor emulsification (poor emulsifier selection, poor emulsification process, excessive emulsification particles, etc.), rather than shear resistance (mainly the problem of silicone oil itself, such as silicone oil quality, emulsification system, silicone oil variety, silicone oil synthesis process, etc.) Wait).
4. You can choose changes in shear resistance, electrolyte resistance, and PH resistance, but you should pay attention to the use of silicone oil and the environment, and you can also consider the choice of hydrophilic silicone oil.
(9) Poor fluffing after soft finishing: Poor fluffing is closely related to the operating hair machine (such as tension control, hair roller speed, etc.). For fluffing, softening agents (commonly known as waxing), and controlling dynamic and static friction coefficients of fabrics It is the key, so the preparation of the fluff softener is the key. If the softener is used improperly, it will directly lead to bad fluff, and even cause the cloth to break or the door width to change.
Related Suggestion : WATERPROOF MICROFIBER MATTRESS PROTECTORS