Mowiol 47-88

The scientific name of PVB resin is polyvinyl butyral resin. It was successfully industrialized in the United States in the 1930s and has a history of more than 70 years. my country has been trying to industrialize it since the 1960s, but due to the sensitivity of raw materials and process parameters, the product quality fluctuates greatly. The few finished products can only meet military purposes. It was not until the 1990s that a small amount of PVB (B-06HX &PVB B-20HX) products entered the civilian market.   Due to the different processes of PVB manufacturers, the requirements for PVB quality indicators are also different. Not only are there certain restrictions on the viscosity range, but there are also clear requirements for many indicators such as acetalization degree, tensile strength, and film-forming properties. Therefore, it is very easy to make PVB resin. However, it is quite difficult to make products that satisfy users. In order to produce PVB resins that meet user needs and improve the qualified rate of products, the following countermeasures should be taken:   Carefully select raw materials PVA PVA has a variety of models (such as PVA 088-50 & PVA 2488, Mowiol 47-88), not only with different degrees of polymerization, but also with different degrees of alcoholysis. To figure out how much acetalization you need, pick a PVA that meets the viscosity requirements. Try to keep the process conditions the same so that the product quality stays good without putting in extra effort. Process control programming At present, the production of China PVB resin adopts two-step precipitation method, kettle operation, and intermittent production. The production control is mainly manual control, which is quite arbitrary, especially the viscosity of PVB. The viscosity changes greatly with a slight change in the process.It's a good idea to use a DCS control system for making PVB resin. Stick to a programmed operation and keep the process steps pretty much the same for each customer. Strict finished product management It is best to adopt order-based production, and deliver it to customers in time after production is completed. Products that have not been delivered to customers must be placed separately and must not be mixed. For products that have been parked in the warehouse for more than one month, re-sampling and analysis are required before leaving the factory to prevent degradation of PVB resin powder. Disposal of unqualified products Some products may not meet the requirements of a certain user for individual indicators, but there is no problem with the quality of the batch of products itself. The usual practice is to find users with the same or similar quality as the batch of products and make appropriate treatments based on the degree of compliance. If the same products can be sent directly to the user, if the same products are not met, measures such as return package and add can be taken. Products with quality problems can only be sold as waste or destroyed.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com