Usually buy large home appliances, small friends will find that the packaging of electrical appliances will use a lot of foam packaging products, and these packaging products are required to be made through foam mold, so the production of foam packaging products or need to use what raw materials? Xiaobian here to give you an introduction.
One, polyether. Most manufacturers will choose a low price, easy to purchase polyether polyol, the data department needs to stop the secondary processing synthesis of special polyether, can save processing time and processing costs, but also can be very good and water dissolved, the viscosity is very low after the combination, convenient site construction. Later in the polyether will participate in the emulsifier, this is to let it can be mixed more evenly, to prevent the onset of precipitation in a long time of placement, causing stratification problems. Using high activity polyether, in the whole water foam system, the reaction of NCO and urea will interfere with the formation and aggregation, so that the brittleness of the foam is greatly reduced
On the contrary, if more water and isocyanate of NCO reaction, the formation of polyurea, and a large number of the collection of this urea will lead to the increase in the fragility of the foam.
Second, catalyst. The quality of the catalyst will affect the final production quality, so in the choice to pay special attention to, first can not use the stability of tin, amine catalyst; In the all-water foaming system, a large amount of water will affect their stability. In addition, when the all-water foaming system is foaming, a large amount of heat will be released, which needs to be discharged in immediately. Finally, insist on the balance between foaming and gelatinous response. In general, if the above three points can not be done, it may affect the foam performance and the stability of the combined stock solution.
Third, stabilizer. In high-water system, the ordinary non-hydrolytic stabilizer will soon lose its effect, so at the very beginning, we encountered great problems, but after a lot of experiments and learning, we finally found the most suitable stabilizer. Foam stabilizer's application amount is very large, common will account for 2% ~ 3% of the total amount of polyether, abundant guaranteed the foam's application performance, but also can make the combination of polyether stable storage for a long time.
The above three kinds of foam packaging often used to make raw materials, usually refers to by the hair of polystyrene raw materials through hot processing mold, molding foam products can achieve buffering, damping effect.
Pingyang Jinshi mould Co., LTD specializes in the production of foam mould, more related products please pay attention to the official website www.zjjdmj.cn
