Polyurethane excipient manufacturing method
1. Introduction
Polyurethane materials have been widely used in the field of chemical raw materials due to their excellent properties, such as wear resistance, impact resistance, waterproofing, etc. To meet different production needs, manufacturing high-quality polyurethane excipients has become crucial. This article will provide a detailed introduction to the manufacturing methods of polyurethane excipients
2、 Manufacturing method
1 Ingredients: Firstly, prepare raw materials such as polyols, diisocyanates, chain extenders, catalysts, flame retardants, etc. according to the predetermined formula ratio. The quality and purity of these raw materials have a significant impact on the quality of polyurethane excipients, therefore strict control is required
2. Mixing
Mix the polyols and diisocyanates in the ingredients in a certain proportion, add chain extenders, catalysts, etc., and stir at high speed to make them fully and evenly mixed. During the mixing process, it is necessary to control the temperature and stirring speed to avoid affecting the quality of the product
3. Maturation
Put the mixed materials into the maturation equipment for maturation, and the maturation time and temperature need to be set according to the product requirements. During the maturation process, attention should be paid to maintaining a clean and dry environment to prevent product contamination
4. After the maturation is completed, the bubbles in the material need to be removed. The general method of vacuum defoaming can effectively improve the quality and appearance of the product
5. After pouring
defoaming is completed, pour the material into the designated mold, paying attention to controlling the pouring speed and mold temperature to avoid affecting the product's molding and performance
6. After the pouring is completed, place the mold into the curing equipment for curing. During the curing process, temperature and time need to be controlled to ensure that the product is fully cured and achieves optimal performance
3、 Notes
1 During the manufacturing process, it is necessary to strictly control various process parameters, such as temperature, time, stirring speed, etc., to ensure product quality
The quality and purity of raw materials have a significant impact on the quality of products and require strict control
During the manufacturing process, the environment should be kept clean and dry to prevent product contamination
The defoaming and curing process is a crucial step in ensuring product quality and requires special attention
4、 Conclusion: Polyurethane excipients have broad application prospects in the field of chemical raw materials, and mastering their manufacturing methods is of great significance for improving product quality and reducing costs. Through strict ingredient ratio control, scientific mixing technology, reasonable curing time and temperature setting, effective defoaming treatment, and standardized pouring and curing operations, high-performance polyurethane excipients can be manufactured to meet different production needs.
