Application and Introduction of Amino Silicone Oil

Jun 3, 2021

Amino silicone oil is currently widely used in the soft finishing of cotton, linen, wool, silk and chemical fiber fabrics. After its finishing, the fabric has the advantages of softness, smoothness, plumpness, good resilience, durability, wrinkle resistance, scratching, and washing resistance. However, the general amino silicone oil has three major disadvantages: ①There is no hydrophilic group in the structure, the finished fabric has water repellency or low water absorption, and the hydrophilic and antistatic wear comfort is poor; ②The fabric is heated or exposed to water. Ultraviolet radiation will oxidize the amino group and cause yellowing; ③Poor stability (including storage stability, dilution stability, thermal stability and mechanical stability) will cause delamination of floating oil and sticky rollers, which will affect the use. Therefore, amino silicone oil must be used. Re-modification is carried out to improve the above shortcomings. The commonly used method is to modify the amino silicone oil by epoxy compound or acrylate ether and then modify or polyether and then modify to form hydrophilic amino silicone oil, or make it hydrophilic first Silicone oil is modified with amino to form hydrophilic amino silicone oil. Tests have found that the hydrophilic amino silicone oil made by a single method has some obvious shortcomings, so we comply with people's improvement in fabric breathability, hydrophilicity, and antistatic It is required to use different methods to make 2 kinds of hydrophilic amino silicone oils and then compound them. Its unique process, 

Result: The hand feels soft and smooth; Hydrophilicity: less than 1 s; Durability: Wash 10 times in a civilian washing machine with a civilian Omo brand washing powder, and the hydrophilicity is still less than 1 s, which meets the special durable hydrophilicity of the towel fabric Requirements; whiteness: unchanged.
Used for moisture wicking and soft finishing of pure polyester or polyester cotton fabrics
The method of pure polyester synthetic fiber to solve moisture absorption and perspiration (hydrophilicity): (1) Introduce hydrophilic monomers into the fiber molecular structure or become hydrophilic monomers during dyeing and finishing. This method It has a great impact on the physical properties and manufacturing technology of the fiber; (2) Blending spinning with hydrophilic components. This method will also bring difficulties to the manufacturing technology and affect the performance of the fiber; 3) By changing the physical properties of the fiber Structure and giving synthetic fibers hydrophilic to change the physical structure of the fiber is mainly to increase the microporous structure of the fiber, form a capillary effect and improve the hydrophilicity of the fiber; (4) Form a hydrophilic film on the surface of the fabric. This method is simple Easy to do, but to solve the problem of washing resistance.

The application shows that the hydrophilic amino silicone oil NB -8270 can significantly improve the handle and hydrophilicity of polyester, improve the antistatic and easy stain removal properties of polyester, and does not affect the whiteness of the fabric. With the increase of the dosage, the finishing effect is improved. And the improvement is becoming more and more obvious. The effect after baking is slightly lower than the finishing effect before baking. This is because the organic silicon film is formed more tightly during baking, which affects the moisture absorption performance of the fabric to a certain extent, and it is slippery. The refreshing feeling has increased, but the softness and hydrophilicity are slightly reduced, and the corresponding antistatic and easy decontamination properties are also slightly reduced.

Thermal migration of disperse dyes after dyeing means that after disperse dyes dye polyester fibers, during high-temperature treatment (tentering), due to the influence of fabric surface additives, a thermal migration occurs, and the dye migrates from the inside of the fiber through the expanded fiber capillary. To the surface of the fiber, it causes the dye to accumulate on the surface of the fiber, resulting in a series of fastness declines. This phenomenon may also appear in the long-term storage and transportation of dyed textiles and clothing. It is a disperse dye in a two-phase solvent (polyester fiber and additives) The redistribution phenomenon of disperse dyes is different from the sublimation fastness of disperse dyes. This decrease in fastness is collectively referred to as heat migration fastness. The reason for the heat migration phenomenon is that the auxiliary agent in the outer layer of the fiber dissolves the dye at high temperature. The inside of the fiber expands and migrates to the surface of the fiber through the high temperature of the fiber capillary tube, which causes the dye to accumulate on the surface of the fiber, causing a series of effects, such as color change, staining other fabrics during ironing, friction resistance, washing resistance, sweat resistance, and durability. Dry cleaning and light fastness decreased.

The thermal migration of disperse dyes is related to the molecular structure of the dye itself, but has no absolute relationship with the sublimation fastness of the dye, because the mechanism of the two is different.It has been found in production practice that the widely used nonionic surfactants are the main cause of the thermal migration of disperse dyes, but disperse dyes with different structures have different solubility in nonionic surfactants. Because polyester fibers and disperse dyes are both non-ionic Ionic, a large number of non-ionic emulsifiers are used as the second solvent of disperse dyes to cause this-the phenomenon has been widely used in textiles in the past 20 years. Amino silicone oils containing a large amount of non-ionic surfactants (40%-50% of silicone oil) Caused by microemulsion softeners.

How to solve the problem of thermal migration of polyester after dyeing? The solution is to switch to a large amount of emulsifier-containing amino silicone oil and a self-emulsifying hydrophilic amino silicone oil without emulsifier. At the same time, the introduction of heat-resistant migration disperse dyes, such as containing The special structure , makes the dyed dye have a high affinity with polyester fiber, and it is difficult to migrate from the inside of the fiber to the surface at high temperatures. , So as to solve the decrease in fastness caused by thermal migration. Because the large-emulsified amino silicone oil is easy to float, the self-emulsifying hydrophilic amino silicone oil without emulsifier has become the research focus.Hydrophilic amino silicone oil , which can be infinitely dissolved in water without emulsifier, is called self-emulsifying hydrophilic amino silicone oil. After application, it is found that it can significantly reduce the tendency of dye thermal migration.