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Causes of silicone oil spots and how to remove them

Views: 0     Author: Site Editor     Publish Time: 2022-09-27      Origin: Site

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1. How to deal with the silicon spots on the fabric surface after setting?

For the silicon spots on polyester fabrics, it can be removed with degreaser and soda ash (with degreaser, treated under the alkaline condition of 80-90 degrees), or silicon remover and soda ash.

For pure cotton and polyester-cotton fabrics, after the silicon spots on the fabric are generally removed, the fabric color becomes lighter, and the fabric needs to be re-dyed.

 

2. When the amino silicone oil emulsion is used together with the fixing agent, soft oil, etc., sometimes there will be silicon spots, but not when used alone, why?

Amino silicone oil is incompatible with additives such as color fixer and soft oil, resulting in silicone oil floating.

Amino silicone oil emulsion is a cationic surfactant (or weak cation), and many chemicals used in the dyeing process are anionic surfactants, such as: dyes (some dyes are anionic), leveling agents, diffusing agents, color fixing agent. . . , After these chemicals are dyed and finished, and before softening, once the washing is not thorough, when the cationic amino silicone oil series softener reacts with the anionic substances in the dye bath, it will cause the amino silicone oil cationic emulsion to break demulsification, and the bleaching oil will appear soft. Spots (silicon spots), the effective method is to strengthen the full washing before softening, it is best not to do the softening in the same dyeing machine. After dyeing and washing, the fabric is poured out and soft-finished in a rolling mill. It can effectively avoid or reduce the formation of soft spots (silicon spots).

 

3. How to deal with silicon spots produced by sweaters?

Under normal circumstances, manufacturers of silicone oil and softener will develop matching silicone stripping agents to facilitate the finishing of sticky or silicon spots during operation, but most of them cannot completely solve the problem and can only be alleviated.

In the actual factory operation process, many manufacturers who successfully solve the problem use gun water and Jiebao to deal with them.

The operation process is as follows:

Soak the problem part with Dajie Wang gun water for 10-30 minutes. During the soaking process, the gun water is very volatile, so it is necessary to seal it as much as possible, and then wash it gently. If there is no gun water, you can also use Tianna water instead. .

After the treatment, there will still be slight traces on the problem part, but use Jiebao auxiliaries for cleaning. After cleaning, the fabric will smell. It needs to be dried with cold air when it is 80% dry. The whole process must be operated with gloves. .

 

4. Removal of silicone softener on finished knitted fabrics?

Silicone softeners can give knitted fabrics a soft, smooth, plump and elastic feel, as well as anti-wrinkle, wear-resistant, washing-resistant and good sewing properties, which greatly improves the added value of the product, so it is favored by customers.

Silicone softener has stable chemical properties, belongs to a non-water-soluble macromolecular structure, and has strong adsorption capacity on the surface of fibers, and some active groups form chemical bonds or self-crosslinking with fibers, forming an elastic network structure with a high degree of polymerization on the surface of fibers. Therefore, it is difficult to remove the silicone softener from the finished knitted fabric by ordinary methods.

On the other hand, knitted fabrics have a high rate of over-dyeing and re-repairing. If the fabric is over-dyed or repaired without removing the silicone softener on the fabric, the fabric will not be colored at all. Overstaining and rework requires removal of the silicone softener from the reworked fabric.

After repeated tests and large-scale production promotion and application, a method that can effectively remove the silicone softener on the knitted finished fabric has been found.


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