Keywords: Washing equipment clothes selection of auxiliaries ,finishing of washing plants
As a manufacturer specializing in the production of washing equipment, it is also very concerned about the operation of washing plants. Today, the top 100 companies share with the owners of washing plants the knowledge of common quality problems and the selection of auxiliaries in post-cleaning, which can help the operation of washing plants
1. Common quality problems in soft finishing
1 · 1 can not reach the proper feeling
The soft style of soft finishing varies with customer requirements, such as soft, smooth, fluffy, waxy, oily, dry, etc. Different softeners are selected according to different styles. For example, the softness, bulkiness, smoothness, yellowing, and water absorption of fabrics are different for soft films with different structures; In silicone oil, the properties of modified silicone oil with different modified groups are also different, such as amino silicone oil, hydroxy silicone oil, epoxy modified silicone oil, carboxyl modified silicone oil, etc.
1 · 2 Color turns yellow
Generally, the amino group in the film with amino structure and amino silicone oil is easy to cause yellowing. Among the films, the cationic film is soft and feels good, and is easy to be adsorbed on the fabric, but it is easy to turn yellow and discolor, which affects the hydrophilicity. If the cationic film is converted into soft oil essence, its yellowing will be greatly reduced, and its hydrophilicity will also be improved. If the cationic film is compounded with hydrophilic silicone oil or hydrophilic finishing agent, its hydrophilicity will be improved.
Anionic film or non-ionic film is not easy to turn yellow; Some films do not turn yellow or affect hydrophilicity. Amino silicone oil is the most widely used silicone oil at present, but due to the fact that amino acid will cause discoloration and yellowing, the higher the ammonia value is, the greater the yellowing will be. The low yellowing amino silicone oil or polyether modified, epoxy modified and other non-yellowing silicone oil should be used.
In addition, cationic surfactants such as 1227, 1831 and 1631 are sometimes used as emulsifiers in lotion polymerization, which will also cause yellowing. Different emulsifiers are used in the emulsification of silicone oil, and their "stripping effect" is different, which will cause stripping and light color under different conditions; Already belongs to color change.
1.3 Fabric hydrophilicity decreases
Generally, due to the structural problems of the film used, the lack of water absorption group after the film formation of silicone oil, and the blocking of water absorption centers such as hydroxyl group of cellulose fiber, carboxyl group and amino group on wool, the water absorption is reduced. Anionic, non-ionic film and hydrophilic silicone oil should be selected as far as possible.