With the development of textile printing and dyeing industry, the production of printing and dyeing auxiliaries in China has made progress.Since 1990s, the development of new fiber, the innovation of textile technology, the improvement of consumption level and the increase of export volume have forced the textile industry to seek new auxiliaries and new business models.From the beginning of import to national research and development and production, gradually formed the rudiment of printing and dyeing auxiliaries production industry with chemical and textile industries crossing each other.With each passing day, our products are developing towards high-grade, comfortable, healthy and ecological green direction.The development trend of textile auxiliaries includes four aspects: developing corresponding auxiliaries according to the development of new fibers;Compound technology is adopted to increase the versatility and high functionality of additives.To supplement and perfect the traditional textile auxiliaries by using high-tech products;Develop environmental protection auxiliaries.In order to adapt to the new development trend, the textile printing and dyeing industry needs to constantly inject fresh blood, in order to maintain the diversified development of production and management.In short, the development of printing and dyeing auxiliaries is a diversified and integrated road of informationization and high-tech, which requires us to continue to explore and discover in the way forward in order to achieve higher and better development.

  1. Common quality problems in soft finishing:

  The soft style of soft finishing is different with different customer requirements, such as soft, smooth, fluffy, soft and waxy,Oil smooth, dry smooth, according to different styles of different softeners.For example, in the film, there are different structures of softener film, its softness,Looseness, smoothness, yellowing, affecting the water absorption of the fabric are different;In silicone oil, the properties of modified silicone oil with different modified genes are not With, such as amino silicone oil, hydroxyl silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil and so on are different.

  ② Color yellowing: generally caused by a certain structure of film and amino in amino silicone oil yellowing.In the film, cationic film soft, feel is good, easy adsorption on the fabric, but easy to yellow discoloration, hydrophilic, such as cationic film restructuring into soft oil essence, the yellow will be greatly reduced, the hydrophilic also has to improve, such as cationic composite film and hydrophilic silicone oil, or with hydrophilic finishing agent composite, will improve its hydrophilicity.Anionic film or non-ionic film is not easy to yellowing, some film does not yellowing, also does not affect hydrophilicity.Amino silicone oil is currently widely used in silicon oil, but because of amino will cause discoloration and yellowing, the higher the ammonia value, the greater the yellowing, should be converted to low yellowing amino silicone oil or polyether modified, epoxy modified silicone oil is not easy to yellowing.In addition, sometimes cationic surfactants such as 1227, 1831, 1631 are used as emulsifiers in emulsion polymerization.

  These emulsifiers also produce yellowing.When emulsifying silicone oil, different emulsifiers are used, the "stripping effect" is different, which will cause the peeling color and light color under different circumstances, which belongs to color change.

  (3) decreased hydrophilicity of fabric: generally, it is the structure of the film and the lack of water absorption gene after silicone oil film, and the closed like fiber

  The hydroxyl group of plain fiber, carboxyl group of wool, amino group and other water absorption centers cause the decrease of water absorption, so anion and non ion should be selected as far as possible

  Film and hydrophilic type silicone oil.

  (4) deep color spot: the main reason is that the fabric oil stain is not clean when pretreatment, and the color of the oil stain is deep when dyeing;Or too much foam in the dyeing bath, foam and flower sweater, dye and other mixtures on the fabric;Or defoaming agent floating oil caused by dark oil spots;Or dye VAT in the tar on the fabric;Or dye agglutination in different circumstances into dark spots;Or water quality calcium and magnesium ions too much and dye combined with the fabric and other reasons.To be targeted for processing, such as pre-treatment with degreasing agent for refining, dyeing additives with low foam, no foam additives, defoaming agent selection is not easy to float oil varieties, and chelating agent to improve water quality, add dispersant to prevent dye agglutination, timely use of cleaning agent cleaning cylinder washing cylinder.

  ⑤ Light spots: Main reason is that before the treatment is not uniform, some parts of the poor Mao Xiao, have refused to dye, or with refusal to dye material, cloth or pretreatment with magnesium calcium soap, soap, etc., or silk uneven, or uneven drying, tire or cloth with dissolved sodium sulphate, soda ash and other solids, or dyed before drying drops of water, Or dyeing soft treatment after finishing with additives spot stain.Similarly, it must be targeted, such as strengthening pre-treatment, pre-treatment agent selection must not be easy to form calcium and magnesium soap, pre-treatment must be uniform and thorough (which is related to the selection of scouring agent, penetrating agent, chelating dispersant, mercerizing penetrant, etc.), sodium sulfate, soda soda, etc., must be well into the cylinder and must strengthen production management.

  ⑥ Alkali spot: the main reason is that pretreatment (such as bleaching, mercerization) after alkali is not clean or uneven, resulting in alkali spot, so we must strengthen the pretreatment process of alkali removal process.

  ⑦ Softener stains: there are probably the following reasons:

  A. Poor film softener, with massive softener adhered to the fabric;

  B. Too much foam after the film is melted into the material. When the cloth is out of the cylinder, the fabric belt will be stained with foam softener;

  C. The water quality is not good, the hardness is too high, and the impurities in the water combine with the softener and agglutinate on the fabric.Some factories even use sodium h6 metaphosphate or alum and other water treatment, these substances and water impurities form flocculent, into the soft treatment bath after the cloth with spots;

  D. cloth with anionic material, in soft processing, combined with cationic softener into stains, or cloth with alkali, so that softener condensation;

  E. Softeners have different structures, some of which at higher temperatures cause the softener to change from an emulsified state to a slag-like substance that sticks to the fabric, etc.

  F. The original tar-like softener in the tank falls down and sticks to the fabric.

  Silicone oil stain: this is a kind of stain that is difficult to deal with. The main reasons are:

  A. Cloth PH value does not reach neutral, especially alkali, resulting in silicone oil breaking and floating oil;

  B. The bath water quality is too poor and the hardness is too high. The silicone oil is easy to float oil in water with a hardness of >150PPM;

  C. Silicone oil quality problems include poor emulsification (emulsifier selection is poor, emulsifying process is poor, emulsifying particles are too large, etc.), not shear resistance (mainly silicone oil itself problems such as silicone oil quality, emulsifying system, silicone oil varieties, silicone oil synthesis process, etc.).Can choose shear resistance, electrolyte resistance, PH resistance of silicone oil, but pay attention to the use of silicone oil and environment, can also consider the selection of hydrophilic silicone oil.

  ⑨ Poor pilling: Poor pilling is closely related to the operation of pilling machine (such as tension control, pilling roller speed, etc.). For pilling, applying softener (commonly known as waxing)

  When, the control of the dynamic and static friction coefficient of the fabric is the key, so the preparation of the fuzz softener is the key, if the softener is not good, it will directly cause the poor fuzz, and even cause the bra or the change of the door width.

  2 common quality problems in resin finishing:

  (1) Formaldehyde problem: due to free formaldehyde in the resin or N - hydroxymethyl structure of the resin decomposition of formaldehyde caused by formaldehyde content exceeds the standard.Should use ultra low formaldehyde resin or formaldehyde free resin.Of course, the source of formaldehyde problem is very extensive, such as fixing agent Y, M, softener MS - 20, S - 1, waterproof agent AEG, FTC, adhesive RF, flame retardant THPC

  And other additives can sometimes cause formaldehyde exceed the standard.At the same time, formaldehyde migration in the air may also cause excessive formaldehyde on the fabric.

  ② yellowing or color change problem: after resin finishing, it will generally cause yellowing, so it is necessary to control the PH value of resin finishing agent, acid composition, catalyst composition, as far as possible to reduce yellowing and color change.

  (3) strength drop problem: general resin finishing will produce strength drop, fiber protective agent can be added, such as oxidized polyethylene wax emulsion.

  (4) handle problem: general resin finishing will cause the feeling of hardening, soft ingredients can be added, but pay attention to not affect the quality of resin finishing.Hand feel has improved, which has greatly improved the strength drop problem.However, the hard hand feeling caused by the surface resin is caused by the resin itself and drying and other reasons, so it should be targeted to improve.3 Other quality problems:

  ① Metal ions exceed the standard: Metal ions Cu, Cr, Co, Ni, Zn, Hg, As, Pb, Cd and so on are detected in export products. If they exceed the standard, they will produce serious consequences As formaldehyde exceeds the standard. In auxiliaries, there are less metal ions of this kind, but some auxiliaries will cause excessive, such As flame retardant antimony trioxide emulsion containing a lot of mercury, Waterproof agent CR, Phobo Tex CR(CIBA), Cerolc(Sandoz) and other chromium.When medium dyes are used on wool, the medium dyes used are potassium dichromate or sodium dichromate or sodium chromate, Cr6 will exceed the standard.

  ② Color change problem: In after finishing, color change is more, it must pay attention to when dyeing dyes selection, when dyeing proofing, must carry on the corresponding finishing according to the process, will determine whether choose dye in the finishing issued to the attraction in auxiliary role change, of course, Z good choice not cause color change after finishing agent is the ideal solution, Z But this often has limitations (such as copper containing antibacterial agent itself has color, water-repellent agent containing chromium also has color, will cause the color change of the fabric), but also to take into account the dyeing fabric in drying and baking dye sublimation caused by light and color change and high temperature caused by yellowing and other factors.

  (3) APEO overweight: APEO as an indicator is also restricted by some countries, the indicators and pretreatment of scouring agent, penetrating agent, printing dyeing of net lotion, leveling agent, softener when finishing all related, such as the emulsifier in the currently widely used TX, NP series of surfactant as auxiliary raw material, its difficult to prevent, The only way is to adhere to the use of environmental protection additives, strictly prevent the use of additives containing APEO and toxic and harmful substances into the factory.