This classification includes Christmas sweaters with high quality, good comfort, all kinds of customized colors.
We export to many countries such as Russia, Germany, America etc.
Our products mainly made of cashmere, wool, cotton, acrylic, polyster etc and all the colors, sizes and compositions can be customized.
We also have many cash commodity items, we welcome customers send inquiries and cooperate together.
Christmas Sweater,Christmas Cardigan,Womens Christmas Sweaters,Grinch Christmas Sweater Jiangyin Minglang Textile Co., Ltd , https://www.jymltextile.com
The cationic yarn belongs to the modified polyester. The chemical name: polybutylene terephthalate (elastic polyester), abbreviation: PBT, is also indicated by CD in the factory. Because ordinary polyester (polyethylene terephthalate) has low moisture absorption, poor dyeing performance, easy accumulation of static electricity, easy to fluff and other shortcomings, it is usually modified with a sulfonate as a modifier to be dyed with cationic dyes. Polyester, or adding a cationic active agent before or during spinning to prepare a modified polyester. Such a yarn is called a cationic yarn. This yarn does not need to be dyed at a high temperature (130-135 ° C) like normal polyester. It can be dyed.
Polyester fiber is a hydrophobic synthetic fiber lacking a functional group capable of binding to a direct dye, an acid dye, a basic dye or the like. Although it has an ester group capable of forming a hydrogen bond with the disperse dye, the polyester molecular chain structure is tight, and the dye molecules are not easily entered into the fiber interior, resulting in difficulty in dyeing and monotonous color, which directly affects the development of polyester fabric color varieties.
Due to the high crystallinity of polyester, there are only small gaps in the fiber. When the temperature is low, the thermal motion of the molecule changes its position to a small extent. Under humid conditions, the polyester fiber does not pass the violently like cotton fiber. Swelling increases the voids, and it is difficult for the dye molecules to penetrate into the inside of the fibers. Polyester dyeing can usually only be dyed with disperse dyes and must be dyed under high temperature and pressure or by means of a carrier.
(1) copolymerization with a chemical substance having a large molecular volume;
(2) mixing and spinning with a compound having a plasticizing effect;
(3) A group having an affinity for a disperse dye such as an ether bond is introduced.
The polyester resin modified by the copolymerization method has a low melting point and a low crystallinity, and the thermal properties and mechanical properties of the fiber are damaged to some extent.
The cationic dye dyeing modification method is to copolymerize a polyester dyeing modifier, such as sodium phthalate-5-sulfonate (commonly known as three monomers, English abbreviation SIPM) with polyester, in the polyester molecular chain after copolymerization. Sulfonic acid groups are introduced, which can be dyed with cationic dyes. The dyed fabrics are brightly colored, the dye exhaustion rate is high, and the discharge of printing and dyeing wastewater is greatly reduced. The copolymerized polyester chips can also increase antistatic, anti-pilling and moisture absorption properties. It is one of the main methods to improve the dyeing performance of polyester in recent years.
Introduction of cationic polyester silk fabric, cationic polyester filament full name: cationic dyedpolyester called cationic dyeable polyester, belonging to denatured / modified polyester, can be dyed with cationic dye at 110 degrees.