Краткое введение в процесс производства поливинилового спирта
The production of polyvinyl alcohol is divided into three ways according to the different raw materials: one is petroleum → ethylene → vinyl acetate → polyvinyl alcohol; the second is natural gas → acetylene → vinyl acetate → polyvinyl alcohol; the third is calcium carbide → acetylene → vinyl acetate → Polyvinyl alcohol. In recent […]
Возникновение и развитие поливинилацетата
Polyvinyl alcohol was first developed by German chemists W.0. Herrmann and W.W. Hachnel in 1924, because it can carry out typical polyol chemical reactions and pass. Insoluble treatment makes it denatured and has different functional effects, resulting in a series of synthesisMaterials are widely used in industrial and agricultural production and medical applications. Polyvinyl alcohol in 1926. Industrial production is […]
Применение гидроксипропилметилцеллюлозы
Used as thickener, dispersant, binder, exciphant, oil resistant coating, filler, emulsifier and stabilizer in textile industry. Also widely used in synthetic resin, petrochemical, ceramic, paper, leather, medicine, food and cosmetics and other industries. The main purpose 1, construction industry: as cement mortar water retention agent, retarder mortar with pumping. In plastering, gypsum, putty powder or other building […]
Применение ПВА в медицине
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 alcohol hydrogel is widely […]
Применение поливинилового спирта в глазных каплях
Due to the development of science and technology, people are surrounded by electronic products all day long. People who often use these electronic products can easily cause eye discomfort and other symptoms. At this time, polyvinyl alcohol eye drops come in handy. Polyvinyl alcohol eye drops are colorless, slightly viscous and clear liquids. They can […]
The use of PVA in coatings
Polyvinyl alcohol also has good uses in coatings. The polyvinyl alcohol aqueous solution is condensed with formaldehyde under the catalysis of hydrochloric acid to form a water-resistant polyvinyl formal polymer compound, which is widely used as interior and exterior wall coatings, whitewashing, and caulking of buildings. Polyvinyl alcohol paint has good weather resistance, water resistance, […]
New biodegradable packaging materials
In recent years, the development of new biodegradable packaging materials has received extensive attention. Renewable natural polymers have been used to evaluate the biodegradability of end-use products based on polyvinyl alcohol. Polyvinyl alcohol materials are widely used in biodegradable synthetic polymers due to their biodegradability under various microbial conditions. Polyvinyl alcohol is used in a […]
Development prospects of polyvinyl alcohol
Polyvinyl alcohol (PVA) is a high-molecular polymer, made from vinyl acetate (VAC) through polymerization and alcoholysis. It has good adhesion, film-forming properties, oil resistance, and colloidal protection. Pollution-free and degradable characteristics rarely seen in polymer materials. Compared with other chemical products, PVA and its derivative products have a very broad development space, and new uses […]
China ushered in the 130th Canton Fair debut after the epidemic
The opening ceremony of the 130th Canton Fair and Pearl River International Trade Forum was held in Guangzhou. This Canton Fair is a landmark international trade event held in a special international environment. Control and economic and social development have achieved strategic results. This year’s Canton Fair continues to set up 51 exhibition areas based […]
Polyvinyl Alcohol performance introduction
1. Polyvinyl Alcohol has good mechanical properties, high strength, high modulus and low elongation. 2. Strong acid and alkali resistance and chemical resistance. 3. Light resistance: under long-term sunlight, the loss rate of fiber strength is low. 4. Corrosion resistance: The fiber will not be moldy, rot, or moth-eaten when buried in the ground for a long […]
