Production Situation Of PVC Foam Sheet And Possible Problems

PVC foam sheet, even if it is the same product, is also good or bad. In fact, it is the same for plastic sheet and PVC foam sheet. What are the characteristics of PVC foam sheet, first of all, good quality PVC The foamed sheet is environmentally friendly. When we smell it, there will not be much odor. Secondly, for a good quality PVC foamed sheet, no matter what color it is, it is very transparent and has excellent advantages. Chemical resistance, heat resistance and impact resistance; PVC foam sheet manufacturers tell us that in addition, good PVC foam sheet has light weight, uniform thickness, smooth and flat surface, good heat resistance, high mechanical strength, excellent Chemical stability and other characteristics. 

Now, for the production of PVC foam sheet, it is inseparable from the production line of PVC foam sheet. The manufacturers of PVC foam sheet say that the use of PVC foam sheet is becoming more and more widespread. However, the use of PVC foam sheet production line It is also becoming more and more mature, which has driven the use of PVC foam sheet production lines. The plastic sheet production line has very good water resistance. Even if it is placed in water, it will not be deformed by moisture, and it will not rot and rust. The PVC foam sheet manufacturer understands that the continuous improvement and improvement of the plastic sheet production line has solved the scarcity performance of the plastic sheet to a certain extent, and at the same time, it can also recycle a part of the waste, which has greatly improved the environment. And the PVC foam sheet production line gradually realized the problem of simultaneous production of multiple templates, increasing output.

Briefly describe the lack of stability in the production of PVC foamed sheet, which will affect the entire sheet surface and the yellowing of the sheet surface, and the brittleness of the foamed sheet is large. The solution is to reduce the processing temperature. If it does not improve, you can adjust the formula and appropriately increase the amount of stabilizer and lubricant. The stabilizer is a lubricant system based on imported lubricants to enhance the fluidity of materials and the fluidity of heat-resistant materials. , Good heat resistance, strong weather resistance, good dispersibility, toughening and promoting melting; excellent stability, plasticizing fluidity, wide processing range, strong applicability, and auxiliary internal and external lubrication. Lubricants have special properties such as low viscosity, high softening point, excellent lubricity and dispersion, and are widely used in plastic processing and other industries. Both good internal and external lubricating effects; good compatibility with polyethylene, polyvinyl chloride, polypropylene, etc. Insufficient melt strength will lead to large foam cells and long vertical section bubbles. 

To determine whether the melt strength is insufficient, the direct method is to press the sheet wrapped on the middle roll with your fingers behind the three rolls. Describe the melt strength is good when you can feel the elasticity. If it is difficult to pop up after pressing, the melt strength is poor. Because the screw structure and cooling method are quite different, it is difficult to judge whether the temperature is reasonable. Generally speaking, within the load allowed by the extruder, in order to obtain a uniform foaming product in the foamed sheet, it is also necessary to ensure that the PVC material has a good Melt strength. So the quality of the foaming regulator is very important. In addition to the basic functions of general-purpose processing aids, foaming regulators also have a high molecular weight and strong melt strength, which can significantly improve the melt strength of PVC mixtures, prevent bubbles from melding and breaking, and obtain more uniform foam. Pore structure and lower product density, while also improving product surface gloss. Of course, the amount of yellow foaming agent and white foaming agent should also be matched. The company welcomes friends from all walks of life to come to our company to discuss business.