PVA Fiber

Vinylon is the trade name of polyvinyl acetal fiber, also known as Vinylon. Its performance is close to cotton, known as 'synthetic cotton', is the largest variety of existing synthetic fibers in hygroscopicity. It is not easy to ignite, near the flame melting contraction, there is a little flame at the top of the burning, when the fiber is melted into a gel, the flame becomes larger, there is thick black smoke, emitting bitter aroma, and the black small beaded particles are left after burning, which can be crushed by fingers.   Vinylon is the most hygroscopic variety in synthetic fibers, with a hygroscopic rate of 4.5% to 5%, close to cotton (8%). Vinylon is soft and warm, and its relative density is smaller than cotton, so the same weight of Vinylon with cotton can weave more clothing. Its thermal conductivity is low, so the warmth is good. The wear resistance and strength of Vinylon are also better than cotton, so Vinylon can be blended with cotton in many ways to save cotton. Vinylon is mainly used in the production of garments, cotton sweaters, pants, sweatshirts and other knitted fabrics, can also be used in canvas, fishing nets, surgical stitches, bicycle tire cord, filter materials. More and cotton blend: muslin, poplin, corduroy, underwear, canvas, tarps, packaging materials, work clothes, etc.   The main component of Vinylon is polyvinyl alcohol(PVA), but vinyl alcohol is unstable, generally with stable performance of vinyl alcohol acetate (that is, vinyl acetate) as a monomer polymerization, and then the generated polyvinyl acetate alcohol hydrolysis to polyvinyl alcohol, spinning and then treated with formaldehyde, in the polymer chain to introduce a six-membered ring structure to generate polyvinyl formaldehyde, enhance its strength. To get water resistant Vinylon.   The manufacture of industrial vinylon fiber is to dissolve polyvinyl alcohol in water to produce about 15% aqueous solution, through the spinneret with a diameter of about 0.07 mm, in the saturated sodium sulfate aqueous solution solidification bath to produce fiber, and then stretching and heat treatment to improve strength and heat resistance; Then in the presence of catalyst sulfuric acid, acetal reaction with formaldehyde, the temperature is about 70℃, the time is 20 to 30 minutes, after washing, oil to obtain Vinylon fiber. Vinylon fiber has short fiber, tow and filament and other varieties, of which cotton type short fiber and tow are the most common.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

There are differences between polyvinyl alcohol(PVA) fiber and polyester fiber in chemical structure, physical properties and application fields.   First, the chemical structure of polyvinyl alcohol fiber and polyester fiber is different PVA fiber contains a large number of hydroxyl (-OH) functional groups in its molecular structure, so it has good hydrophilicity and solubility. In the molecular structure of polyester fiber, it mainly contains ester group (-COO-) function group, so it has good water resistance and durability.   Second, the physical properties of PVA fiber and polyester fiber are differentThe tensile strength and modulus of polyvinyl alcohol fiber are low, but it has better softness and bending property. Polyester fibers have higher strength and modulus, but are relatively hard and easy to break. In terms of heat resistance, polyester fiber shows good performance and can withstand high temperature processing; The polyvinyl alcohol fiber is easy to melt and decompose at high temperatures.   Third, the application fields of polyvinyl alcohol fiber and polyester fiber are different Due to the different characteristics of polyvinyl alcohol fiber and polyester fiber, they have their own application advantages in different fields. Polyvinyl alcohol fiber is often used in textile, paper processing, plastic film and other fields, and can also be made into waterproof, moisture-proof, anti-static and other functional fibers. The polyester fiber is often used in the production of clothing, fabrics, ropes and other products with high strength and wear resistance, and is also often used in the production of various plastic products.   In short, there are significant differences between polyvinyl alcohol fiber and polyester fiber in their respective chemical structures, physical properties and application fields. Therefore, in actual production and application, product designers and producers need to choose suitable materials according to different needs.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

The average molecular weight of polyvinyl alcohol used as raw material for polyvinyl alcohol fiber is 60000 ~ 150000, the thermal decomposition temperature is 200~220 ℃, and the melting point is 225~230 ℃. Polyvinyl alcohol fiber can be prepared by wet spinning and dry spinning.   Polyvinyl formaldehyde fiber can be obtained by the acetal treatment of the heat treated polyvinyl alcohol fiber. The process of acetalization is the process of washing the strands to remove sodium sulfate, passing through the aldehyde solution, and then washing. The tow can also be cut into short fibers and transported by air to the aftertreatment machine for acetal treatment on the stainless steel net.   In order to improve the fiber properties, the polyvinyl alcohol solution containing the crosslinking agent boric acid (the concentration is 16%) can be wet-spun, and the resulting primary fiber is solidified in the alkaline coagulation bath, and after neutralization, washing and multi-stage high tensile and heat treatment, the strength of 106 ~ 115cN/dtex filament can be obtained.   PVA fibers are used in the industrial field to make canvas, tarps, filter cloth, transport belts, packaging materials, work clothes, fishing nets and cables for Marine operations. High strength, high modulus filament can be used as a transport belt skeleton material, a variety of rubber hose, rubber cloth and rubber shoes lining material, can also make bicycle tire cord.   Because this fiber can resist the alkalinity of cement, and has good adhesion and affinity with cement, it can replace asbestos as the reinforcing material of cement products. It can be blended with cotton to make a variety of clothing and indoor goods, and can also produce knitwear. However, the heat resistance is poor, the fabric is not crisp, and can not be washed in hot water. In addition, it is also useful in non-woven fabrics and papermaking.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

Polyvinyl alcohol (PVA) eye drops are a type of lubricating eye drops used to relieve dryness, irritation, and discomfort in the eyes. PVA is a water-soluble polymer that forms a protective film on the surface of the eye, providing lubrication and moisturizing effects.   The advantages of PVA eye drops include:  Lubrication: PVA forms a smooth and slippery coating on the eye surface, reducing friction and improving comfort. Moisturization: PVA eye drops help retain moisture in the eyes, preventing dryness and relieving symptoms associated with dry eye syndrome. Compatibility: PVA is compatible with the natural tear film of the eye, making it well-tolerated and suitable for long-term use. Clarity: PVA eye drops are clear and do not cause blurry vision, allowing for clear vision after application. Preservative-free options: Some PVA eye drops are available in preservative-free formulations, which are recommended for individuals with sensitivity to preservatives. Versatility: PVA eye drops can be used by individuals wearing contact lenses, as they provide moisture and lubrication without interfering with lens wear.   However, it's important to note that individual experiences may vary, and it is best to consult with an eye care professional for proper diagnosis and recommendation of eye drops suitable for your specific needs.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.    

Polyvinyl alcohol (PVA) fibers and polypropylene fibers are two different types of synthetic fibers used in various applications. Here are some differences between the two: Material: PVA fibers are made from polyvinyl alcohol, while polypropylene fibers are made from polypropylene. The chemical composition of the two materials is different, resulting in differences in their properties. Strength: PVA fibers have higher tensile strength compared to polypropylene fibers. This means that PVA fibers are generally stronger and more resistant to breaking or stretching. Water Solubility: PVA fibers are water-soluble, meaning they can dissolve in water. This property allows them to be used in applications where temporary support or reinforcement is needed, such as in concrete or fabric manufacturing. On the other hand, polypropylene fibers are not soluble in water and are more resistant to moisture. Chemical Resistance: PVA fibers are more chemically resistant compared to polypropylene fibers. They can withstand exposure to acids, alkalis, and organic solvents, making them suitable for applications where chemical resistance is required. Thermal Properties: PVA fibers have a lower melting point than polypropylene fibers. This means that PVA fibers are more susceptible to heat and can melt or lose their structural integrity at lower temperatures compared to polypropylene fibers. Cost: Polypropylene fibers are generally less expensive compared to PVA fibers. The cost difference is mainly due to differences in raw material costs and manufacturing processes.   It's important to consider the specific requirements and intended application when choosing between PVA fibers and polypropylene fibers, as their different properties can make them more suitable for specific applications.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.  

PVA (#Polyvinyl alcohol) fiber is commonly used as a reinforcing material in concrete. Here are some advantages of using PVA fiber in concrete: Enhanced tensile strength: PVA fiber improves the tensile strength of concrete, making it more resistant to cracking and structural failure. Improved durability: The inclusion of PVA fiber in concrete enhances its resistance to freeze-thaw cycles and reduces the risk of cracking due to temperature variations. This improves the overall durability of concrete structures. Increased impact resistance: PVA fiber reinforcement improves the impact resistance of concrete, making it more resistant to damage from heavy loads, impact forces, and dynamic loads. Enhanced crack control: PVA fibers help control the formation and propagation of cracks in concrete. They act as micro-reinforcement, distributing stress and preventing cracks from widening. Reduced shrinkage cracking: PVA fiber mitigates the risk of shrinkage cracking in concrete by reducing the drying shrinkage and minimizing the formation of shrinkage cracks. Improved workability: PVA fibers enhance the workability of concrete, making it easier to handle, pump, and place. They improve the cohesiveness and consistency of the concrete mix. Increased fire resistance: PVA fibers improve the fire resistance of concrete by reducing the propagation of flames and minimizing the risk of spalling. Enhanced resistance to chemical attack: PVA fibers exhibit good resistance to various chemicals, including acids and alkalis, which can help protect concrete from chemical degradation. The use of PVA fiber in concrete offers numerous advantages, including increased strength, enhanced durability, improved crack control, and better resistance to various external factors. These benefits make PVA fiber a valuable reinforcement material in concrete construction.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.