Introduction of hydroxyl silicone oil for softener
发布时间：2024-07-04
After matching dimethyl hydroxy silicone oil and dimethyl hydrogen siloxane, a silicone emulsion is made for fabric finishing, which can react to form a silicone film covering the surface of the fabric. This very thin silicone film has a good covering strength, so that the treated fabric is soft and has the characteristics of waterproof. In order to obtain a better finishing effect, it is generally necessary to transform the thermodynamically stable spiral configuration of hydroxyl silicone oil into a linear extended chain configuration above 140 ℃, which can be exhibited on the surface of the fiber in the form of a monolayer. The more suitable conditions are drying at 90 ℃ and then baking at 140 ℃ for a short time. Hydroxy silicone oil after baking in the fabric surface to form an elastic film, the film is also insoluble in the lye, there is a good wash.
The finishing principle of hydroxyl silicone oil is because the fabric of natural materials is interwoven by warp and weft yarns, and the yarns are composed of short fibers twisted or filaments and filaments. Therefore, the surface friction properties between fibers or yarns will affect their relative movement. After finishing, the friction coefficient of fibers and yarns is reduced. When touched by hand, fibers and yarns are easy to slip with each other, and the activity resistance between interweaving points is reduced. The fabric is easy to deform in the direction of hand force, showing soft and smooth. When the needle is stuck to the yarn, the yarn is out of the way and is not easily broken, so its sewing thread is greatly improved. In addition, a reduction in the coefficient of friction leads to a reduction in triboelectrification and an improvement in antistatic properties. The elastic film formed by the finishing agent can also improve the elasticity of the fabric and the deformation recovery of fibers and yarns. The elasticity of polyester, which is a material with high initial modulus and good wrinkle resistance, is greatly improved. However, the polyester material after dry heat treatment often feels rough and hard, softness and elasticity due to the improvement of crystallinity and crystallization integrity or the melting and bonding of fiber pile, after finishing with silicone oil alone, the increase in elasticity is relatively small, and it must be used in conjunction with the crosslinking and filling of the resin. The strength of filament fiber is not obvious after organic silicon finishing, mainly because silicone oil is a long-chain macromolecular compound, which cannot enter the inside of the fiber after padding onto the fabric, but can only form a film on the surface of the fiber or yarn, which belongs to surface finishing. In this way, the saturation force between the fibers will be significantly reduced, resulting in the fiber being extracted from the yarn. The small molecular weight crosslinking agent in the finishing agent can enter the inside of the fiber to form a body filler, make up for the reduced satiety.
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