Les propriétés de la fibre d'alcool polyvinylique
It has good mechanical properties, high strength, high modulus and low elongation. Strong acid and alkali resistance and chemical resistance. Light resistance: under long-term sunlight, the fiber strength loss rate is low. Corrosion resistance: Fiber buried underground for a long time will not mold, rot or moth. The fiber has good dispersibility: the fiber does […]
Méthode de production de fibres d'alcool polyvinylique
The average molecular weight of the raw material polyvinyl alcohol used for the polyvinyl alcohol fiber is 60,000-150,000, the thermal decomposition temperature is 200-220°C, and the melting point is 225-230°C. Polyvinyl alcohol fibers can be obtained by wet spinning and dry spinning. The polyvinyl alcohol fiber after the heat treatment can be obtained by acetalizing […]
Développement de la fibre d'alcool polyvinylique
In the early 1930s, the German Wacker Chemical Company first produced polyvinyl alcohol fibers. In 1939, Japan’s Sakurada Ichiro, Yazawa Jiangying, and North Korea’s Li Shengji treated this fiber with formaldehyde to obtain heat-resistant polyvinyl formal fiber. ) to build an industrialized production facility. In 1984, the world output of polyvinyl alcohol fiber was 94kt. […]
Fibres synthétiques à base d'alcool polyvinylique
Synthetic fiber made by spinning polyvinyl alcohol as raw material. The polyvinyl formal fiber obtained by treating this fiber with formaldehyde is called vinylon in China and vinylon in the world. The fibers obtained by spinning relatively low molecular weight polyvinyl alcohol as raw materials are water-soluble and are called water-soluble polyvinyl alcohol fibers. General […]
Brève introduction de la fibre d'alcool polyvinylique
The main features of polyvinyl alcohol fiber are high strength, high modulus, low elongation, wear resistance, acid and alkali resistance, good weather resistance, good affinity and bonding with cement, gypsum and other substrates, and are non-toxic and non-polluting , does not damage the human skin, harmless to the human body, is one of the new […]
Rôle de l'alcool polyvinylique dans la production de latex blanc
Polyvinyl alcohol is an excellent protective colloid and dispersant for vinyl acetate homopolymerization or copolymerization with other monomers to produce emulsion (white glue), which is very important in the production of white glue. Generally, as the degree of polymerization of polyvinyl alcohol increases, the viscosity of the produced emulsion increases. Partial alcoholysis type polyvinyl alcohol […]
Espace de développement de l'alcool polyvinylique
Domestic demand and exports of high-quality, high-density and high-end textiles have increased. The development of high-end paper industry and petroleum extraction has accelerated. The automobile industry has also developed vigorously. The demand for safety glass for automobiles and construction has risen rapidly. These industries have provided new products for the development of polyvinyl alcohol. Broad […]
Amélioration de la technologie des nanocomposites PVA
In people’s daily lives, packaging materials can be seen everywhere, and packaging materials used in food are given more missions. It needs to protect food from external pollution and isolate the air. Anti-aging, delay the deterioration time and facilitate storage. There are many kinds of packaging films used for food packaging, such as nylon film, […]
Éponge d'alcool polyvinylique ionisé
A new type of medical non-fiber sponge formed by introducing sodium polyacrylate side chains into PVA macromolecules is called ionized polyvinyl alcohol sponge. It has good biocompatibility and stable chemical properties, and has excellent hydrophilicity, liquid absorption and Blood-sucking performance. i-PVA sponge can be effectively used in medical operations such as microsurgery and eye surgery […]
Hydrogel PVA
PVA hydrogel has the characteristics of water content, elastic modulus, low friction coefficient, high mechanical strength, rich pore leakage network structure, and good biocompatibility similar to the natural tissues of the human body. Wide range of applications. It can be used to manufacture artificial cartilage, artificial cornea, artificial vitreous, etc. Polyvinyl ferment hydrogel is widely […]
