如何鉴别 PVA 水溶性薄膜产品的质量
1) Water solubility: Cold water soluble film requires that water can be dissolved in water above 4 ℃. The faster it dissolves the better. The less residue remaining after dissolution, the better. The clearer the dissolved water, the better. 2) Appearance quality: The smoother the winding, the better. There should be no obvious unevenness and […]
对 PVA（聚乙烯醇）树脂进行一系列化学改性
Through a series of chemical modifications to PVA (polyvinyl alcohol) resin, the water resistance of PVA and the compactness of the arrangement of PVA molecules are improved, so that it is difficult for gas molecules to pass through the coating. At the same time, a high-barrier ore body is added to the coating solution to […]
如何溶解聚乙烯醇 PVA
The dissolution of polyvinyl alcohol is a very delicate operation. If the dissolution is not good, micelles or even hard blocks will appear, which directly affects the subsequent operation and product quality. First, the polyvinyl alcohol is dispersed into cold water. The dispersion means that the particles are scattered in the water, rather than a […]
PVA 作为一种新型环保材料
Biodegradable plastics represented by PLA and PBAT have begun to usher in an outbreak, and PVA has also quietly entered the ranks of alternatives to traditional plastics and developed various applications. If made into PVA film to replace traditional plastic film, it can be used in plastic bags, food packaging and other fields. Pure PVA […]
用聚乙烯醇改性
Polyvinyl alcohol (PVA) is a colorless, non-toxic, non-corrosive, biodegradable water-soluble organic polymer. At present, in addition to being the raw material of vinylon, PVA is widely used in textile sizing, coatings, adhesives, emulsifiers, films and other industrial fields. However, the PVA molecule contains a large number of hydroxyl groups, resulting in poor water resistance and […]
什么是瓜尔豆醚？
(1) Compared with cellulose ether, guar ether is more soluble in water. The performance of the pH guar ether was essentially unaffected. (2) Under the condition of low viscosity and low dosage, guar gum can replace cellulose ether in the same amount, and has similar water retention. However, the consistency, sag resistance and thixotropy are […]
改性聚乙烯醇纤维
Polyvinyl alcohol fiber can be blended with other fibers, and then dissolved after textile processing to obtain high-grade spun yarn textiles, and can also be made into non-twisted yarn or non-weft blanket. It can also be used in papermaking as a binder to improve the strength and toughness of paper. In addition, it can also […]
绿色环保的可降解 PVA
The interpenetrating network structure polymer plastic alloy formed by blending modified PVA and modified starch is biodegradable. Films suitable for food packaging, agricultural water-soluble films, containers and disposable consumer products are often produced. The waste can be swallowed by microorganisms in moist soil and degrade into carbon dioxide and water, which is non-polluting to the […]
