Naia TM Cellulose acetate fiber is essentially two acetic acid fiber, the English name is Cellulose Di-acetate, abbreviated as CDA. In addition, there are three acetate fibers, the English name is Cellulose Tri-acetate, abbreviated as CTA. Its initial raw material is FSC. Promotion And PEFC TM The pulp of certified wood processing was treated by acetylation, resulting in the reaction of cellulose with 74% to 92% hydroxyl groups with acetic anhydride to form cellulose acetate and then dry spinning. In the classification of fibers, they belong to the category of regenerated cellulose fibers.
The characteristics of the material determine the strength of cellulose acetate fiber is relatively low, the initial monofilament line density is about 4 D, with the continuous innovation of production technology, the minimum linear density of monofilament can reach 0.75 D. The progress of technology not only improves yarn strength, but also improves the processing performance, and optimizes the product style and handle.
Hygroscopicity and conductivity
Naia TM Acetyl cellulose fiber contains a certain number of hydrophilic hydroxyl groups, its regular moisture regain is 6.5%, lower than other regenerated cellulose fibers, but far higher than other synthetic fibers such as polyester. The esterification of most hydroxyl groups makes Naia TM Cellulose acetate fiber does not absorb water and drastically swells, showing perfect dimensional stability, quick drying performance and dyeing and finishing advantages. Proper hygroscopicity does not cause static electricity. The specific resistance of the material is about 1.9 x 10. Seven The fibers also exhibit good spinnability, around cm.
Physical properties such as tensile strength and tensile strength
The dry strength of cellulose acetate fiber is about 1.2 to 1.4 cN/dtex, and the wet strength is 30% lower than that of dry strength. The elongation at break is about 25%, and the wet elongation at break is about 40%. The tensile properties of cellulose acetate fibers should be fully considered during twisting, weaving, dyeing and finishing.
Heat resistance and thermal stability
Cellulose acetate fibers are thermoplastic fibers. Their heat resistance and thermal stability are good. They begin to deform at 140~150 degrees, Naia TM The softening point of cellulose acetate fiber is 190~205 C and the melting point is 250~255 C. Under the corresponding temperature and pressure conditions, Naia TM Cellulose acetate fibers can be melt bonded or die treated. This is the property that other regenerated cellulose fibers do not possess.
Resistance to chemicals and degradation
Cellulose acetate fibers are stable under dilute acid and low alkali conditions, but excessive pH can make saponification change. In addition, the combination of pH and temperature will affect the strength and gloss of cellulose acetate fiber.
Naia TM Cellulose acetate fibers obtained OK biodegradable SOIL (soil degradation certification) and OK biodegradable WATER (freshwater biodegradable certification), under the corresponding conditions can be natural degradation, can ease the impact of textile and garment waste on the earth's environment, has the significance of sustainable development, so many of them recognized and accepted.
The cellulose acetate fiber can only be dyed by disperse dyes. Initially, disperse dyes were introduced to the market in order to adapt to the development of cellulose acetate fibers. With the rapid expansion of the polyester fiber market, disperse dyes have developed rapidly and become the main dyestuffs for dyeing and printing polyester fibers.
The crystallinity and orientation degree of cellulose acetate fiber were lower than that of polyester fiber. Due to hydroxyl group, the hydrophilicity was relatively high. It was easy to swell in water than polyester. It began to dye at 40 degrees Celsius. It had higher dye uptake at lower temperature and the highest dye uptake at 75. Disperse dyes have the highest saturation value on cellulose acetate fibers and are easy to dye strong colors.
Naia TM The special surface and cross section shape of cellulose acetate fibers determine their good gloss properties. According to the standard test method of mirror gloss of ASTM, the test results of different raw materials and the same fabric are given, Naia TM The gloss of cellulose acetate fabric is 1.4 times that of viscose, Model and other similar fabrics, and its luster is soft. It is known as the textile material closest to real silk, which fully embodies the luxurious characteristics of fabrics.