Polyester and viscose contrast

Li County insein woolen mill friendship editing.

Definition: dacron polyester is an important variety of synthetic fiber, name of commodity is polyester fiber in our country. It is pure terephthalic acid (PTA) and dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials by or ester exchange and polycondensation reaction of fiber forming polymer, polyethylene terephthalate (PET), the spinning and aftertreatment fibers.   

Features: 

1. High strength. Short fiber strength is 2.6 ~ 5.7 cN/dtex, high tenacity fiber polyester 5.6 ~ 8.0 cN/dtex. Due to the low moisture absorption, its intensity of wet and dry strength is basically the same. Resistance to impact strength is higher than nylon 4 times, 20 times higher than viscose fiber. 

2. Good elasticity. Elastic wool, when 5% ~ 6% elongation, almost fully recovered. Wrinkle resistance than that of other fibers, the fabric does not wrinkle, size stability is good. Elastic modulus is 22 ~ 141 cn/dtex, 2 ~ 3 times higher than nylon. Polyester fabric with high strength and elastic recovery ability, therefore, its fast and durable, anti-wrinkle wash and wear.

3. Heat resistant polyester is by melt spinning method, after forming of the fiber can again by heat melt, belongs to thermoplastic fibers. Polyester high melting point, and empty specific heat and thermal conductivity are smaller, thus polyester fiber had higher heat resistance and insulation. Is the best in the synthetic fiber. 

4. The polyester fiber surface is smooth, internal molecules are closely packed. . The polyester fiber is the best material, the heat resistance in synthetic fiber fabric with thermoplastic, can make pleated skirts, pleated lasting. At the same time, the melt resistance of polyester fabric is poor, with ash, Mars and other easy to form holes. Accordingly, when wearing should avoid contact cigarette butts, spark and etc.

 5. Good abrasion resistance. Abrasion resistance after wear resistance of nylon best, better than other natural fiber and synthetic fiber. 

6. Good light fastness. Light fastness is second only to acrylic. Polyester fabric has good light fastness, in addition to the worse than acrylic, its fast ability is better than natural fiber fabrics. Especially the ability of fast behind the glass is very good, almost almost same with acrylic. 

7. Corrosion resistance. Resistant to bleach, oxidant, hydrocarbons, ketones, petroleum products and mineral acid. Dilute alkali resistant, not afraid of bad, but hot alkali can make its decomposition. And stronger resistance to acid, alkali, anti-ultraviolet radiation ability.  

8. Dyeing is poorer, but the color fastness is good, not easy to fade. Because there was no specific dyeing polyester molecular chain group, and polarity of smaller, more difficult, and the dyeing less easy to dye, dye molecules into the fibers. 

9. By ordinary polyester filament woven fabric, its performance has good strength, smooth crisp, easy to wash the advantages of fast drying, but there are hard, soft tactility, poor luster, and poor permeability, hygroscopicity, shortcomings. If compared with silk fabric, the gap is too more, so must first emulation silk on the silk yarn structure, in order to eliminate the poor performance of faults. 

10. Poor hygroscopicity, wearing have hot feeling, at the same time with static electricity, dust contamination, affect beautiful and comfortable. But after washing to dry and wet strength little drops, not deformation, good wash and wear performance. Purpose: polyester as a garment with fiber, the fabric after wash to achieve the effect of wrinkle, wash and wear. Often will polyester with various fibre blended or mixed, such as cotton, polyester,Widely used in all kinds of material and decorative materials. Polyester in industry can be used for the conveyor belt, tents, canvas, rope, net, etc., especially for tyre polyester tire cord, in performance is close to nylon. Polyester can also be used for electrical insulating materials, acidproof filter cloth, medicine, industrial fabrics, etc. viscose

Definition: nitrile adhesive (nianjiao) fiber (Viscose fiber), is the full name of Viscose fiber. It is divided into sticky glue filament yarn and viscose staple. Viscose rayon fiber, also known as rayon, ice silk. 2000 years later, the viscose appeared a kind of high-grade varieties, tencel, bamboo fiber. Viscose with cotton or other natural fiber as raw material to produce the cellulose fibre. Performance: the moisture rate of viscose most accord with human body skin physiological requirements, has smooth and cool, breathable, fight electrostatic, dyeing characteristics. Disadvantages: easy to wrinkle, easy shrink, easy to deformation, easy to fade, poor flexibility advantages: 

1. Soft, comfortable: affinity skin, no stimulation to skin, comply with the requirements of environment protection and human health;

2. Absorb sweat, good air permeability, adsorption sweat and sweat on the skin of human body, make the body temperature quickly returned to normal, really breathable, absorb sweat effect.

3. Can't afford the ball, antistatic, due to the higher moisture regain of cotton fiber, so can't afford to static electricity, can't afford the ball;

4. To keep warm, wash: good warmth retention property, and washing resistance. Classification: viscose fiber is regenerated cellulose fiber. It is a natural cellulose as raw material, through alkalization, aging and sulfonated sulfonic acid soluble cellulose ester, soluble in dilute alkali liquor made from viscose, made by wet spinning. Using different raw material and spinning process, can be respectively ordinary viscose fiber, high wet modulus viscose fiber and high tenacity viscose fiber, etc. Ordinary viscose fiber has the general physical and mechanical properties and chemical properties, and points of cotton, wool and filament, commonly known as artificial cotton, wool, and rayon. High wet modulus of viscose fiber with high polymerization degree, strength and wet modulus. The fabric under the wet unit of linear density per te can bear the load of 22.0 cN, and under the load of wet elongation is not more than 15%, mainly has rich fiber. High tenacity viscose fiber has higher strength and fatigue resistance.

Viscose fibre can be divided into ordinary viscose fiber, high wet modulus viscose fiber, viscose fiber and modified viscose fiber. [1] strong viscose fiber, the dry strength more than 30.0 cN/dtex filament said strong silk; More than 38.0 cN/dtex said super silk; More than 44.1 cN/dtex said two super silk; More than 48.5 cN/dtex said SanChao strong silk; More than 53.0 cN/dtex say four super strong silk. High performance of viscose fiber, high elastic modulus under wet fiber, called wave Reno was nabbed fiber, also known as high wet modulus fiber, China said rich fiber, polynosic for short. Wet modulus between ordinary fiber and wave Reno in favour, but high in strength and brittleness of the smaller fiber, said improved high wet modulus fiber.

Purpose: modification of viscose fiber has many USES, such as viscose fiber with polyacrylonitrile or pva composite hair type and bulk resistance, suitable for making a suit, blankets, and decorative fabrics.Has a flat shape and rough touch "straw" (i.e., flat wire) and the proportion of small hollow viscose fiber, coverage and bulk properties, applicable to the preparation of bonnet, bag and all kinds of furniture.With acrylic acid grafted viscose fiber has high ion exchange capacity, could be used in the recovery from the waste liquid of precious metals such as gold, silver, mercury.Contains various kinds of flame retardant viscose fiber, available in the high temperature and fire prevention of the industrial sector.Viscose fiber after processing can also be made from the hemostatic fiber, viscose fiber has a function can be used as artificial kidney dialysis, viscose filament containing barium is suitable medical suture.In addition, the viscose fiber made by treated carbon fiber and graphite fiber with high strength and high modulus, and the epoxy resin made of composite material can be used as a space technology such as ablation of materials;

By strand of cellulose and sodium silicate blended, the processed made from ceramic fiber as reinforced material of high temperature resistant phenolic resin, can be used for liquid rocket engine, the jet engine nozzle and re-entry space device heat shield.

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