HPMC 溶解法
All models can be added to the material by dry blending. When it needs to be added directly to the aqueous solution at room temperature, it is best to use a cold water dispersion type, and it usually takes 10-90 minutes to thicken after adding. For ordinary models, stir and disperse with hot water first, […]
HPMC 的应用
HPMC is often widely used in other fields, such as plastics: as a mold release agent, softener, lubricant, etc. Polyvinyl chloride: used as a dispersant in the production of polyvinyl chloride, it is the main auxiliary agent for the preparation of PVC by suspension polymerization. Pharmaceutical industry: coating materials; film materials; rate-controlling polymer materials for […]
HPMC 的生产方法
Treat the refined cotton cellulose with alkali solution at 35-40°C for half an hour, press, pulverize the cellulose, and properly age at 35°C, so that the average degree of polymerization of the obtained alkali fiber is within the required range. Put the alkali fiber into the etherification kettle, add propylene oxide and methyl chloride in […]
什么是羟丙基甲基纤维素？
Hydroxypropyl methylcellulose (Hypromellose), also known as hypromellose, is a kind of non-ionic cellulose mixed ether. It is a semisynthetic, inactive, viscoelastic polymer commonly used as a lubricant in ophthalmology, or as an excipient or vehicle in oral medicines. Soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water, etc. Aqueous solutions are […]
高强度和高模量 pva 纤维的功能
Anti-cracking and anti-seepage: The fibers are randomly distributed in the concrete (mortar), which can effectively prevent the occurrence and development of cracks and improve the waterproof and anti-seepage ability. Anti-shock and anti-shock: effectively absorb impact energy and improve anti-shock capacity. Anti-freezing and anti-fatigue: the stress caused by the temperature difference between the links improves the […]
高强度、高模量 pva 纤维
混凝土（或砂浆）用 PVA 纤维是一种理想的环保型水泥增强材料，因其独特的分子结构，与水泥具有良好的亲和性，并具有良好的耐碱性和耐候性。在水泥混凝土（或砂浆）中添加 PVA 纤维，可有效控制混凝土因塑性收缩和温度变化而产生的裂缝 [...]
聚乙烯醇纤维的主要缺点
The main disadvantage of polyvinyl alcohol fiber is poor dyeability, low dyeing amount, and not bright color. This is because the fiber has a skin-core structure and some hydroxyl groups are blocked by acetalization. In addition, the hot water resistance of polyvinyl alcohol fiber is poor, and obvious shrinkage and deformation will occur when the […]
高强度聚乙烯醇纤维
High-strength polyvinylalcohol fiber is a fiber obtained by jelly spinning or wet spinning and high-stretching of polyvinylalcohol with a high degree of polymerization. For example: after the jelly yarn spun with dimethyl sulfoxide/water (8/2) mixed solvent is stretched by 48 times, the fiber with the strength of 21.36cN/dtex can be obtained. High-strength and high-modulus polyvinyl […]
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 […]
聚乙烯醇甲醛纤维在工业领域的应用
聚乙烯正式纤维在工业领域可用于制造帆布、防水布、过滤布、传送带、包装材料、工作服、渔网和海上作业用电缆。高强度、高模量的长丝可用作传送带的骨架材料、各种橡胶管的衬里材料、橡胶织物和胶鞋，也可 [...] 用作纱线、纱布和纱线的原料。
