What is the importance of the dyeing process of the polyester ribbon?
2024-05-06
What is the importance of the main dyeing process of thorium webbing? The dyeing process of polyester webbing is as follows: entering the conveyor belt, before cleaning, before drying, dyeing VAT, pre-drying (infrared)-high temperature drying-water washing (reduction cleaning)-drying-tearing the belt. Among other things, the infrared pre-bake causes the dye molecules to attach to the fiber first, thereby preventing the appearance of color and other problems. The role of high-temperature baking is to allow the dye molecules to completely enter the fiber and complete the fiber dyeing process. Reductive cleaning is used to decompose excess dye molecules to ensure color fastness. Webbing manufacturer
Polyester Ribbon
Polyester webbing process: belt, color box steaming, hot steaming, washing, drying, drip coating. The effect of vaporization is to make the acid dye molecules fully react with the corresponding functional groups in the fiber, so as to complete the dyeing process of the acid dye to the fiber. The function of washing is to remove the dye molecules that have not fully reacted and to ensure the color fastness of the product.
The polyester produced by melt spinning was observed under the microscope, and the cross-section was round without special longitudinal structure. Filamentous fibrous tissue can be observed under the electron microscope
The special-shaped fiber can change the elasticity of the fiber, make the fiber have special luster and bulkiness, improve the bonding performance and covering ability of the fiber, and have the effect of anti-pilling and reducing static electricity. For example, the triangular fiber has a glitter effect; the five-leaf fiber has a fat-like luster, feels good, and is anti-pilling. The hollow fiber has a cavity inside, low density and good heat insulation
Electron diffraction measured the thickness of the polyester folded chain to be about 10NM and the length of the polyester substrate to be 1.075nm. Thus, the thickness of the platelets can be considered to be equal to the length of a single base of nine polyester molecules. However, the length of the polyester macromolecular chain is about 1.075*130 (average degree of polymerization) = 140NM, indicating that the polyester lamellar macromolecular chain must adopt a folded chain structure. Because the chain is more flexible and easier to bend, folding of the-CH 2-CH 2-chain segments may occur.
In addition, the macromolecules of the polyester webbing can also form linear crystals (fibrillated crystals). It can be seen that there are both folded chain crystals and fibrous crystals in the polyester tape. The ratio of the two crystals varies with the draw ratio and heat setting conditions.
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