An optimized foam process using inert gases is an energy saver and material with no ozone-depletion or global warming potential. Thermoplastic foam extrusion has proved beneficial to extruders of sheets, boards, rigid profiles, films, garden hose and cables which is why an epe foam manufacturer in chennai would prefer to utilize this process.
Tips For Maintaining Foam Sheet Extrusion:
Choosing The Required Product For The Job:
Not all Chemical Foaming Agents (CFAs) meet the right criteria for all the polymers. The decomposition temperature of the CFA must be close to the temperature processed for the polymer. The gas must be liberated within a particular, fairly narrow temperature range and should be of sufficiently high volume, controllable by pressure and temperature. So, cell structures should not be compromised as it can thermoform poorly which limits depth of draw and leads to weak corners.
Less Would Be More:
It is commonly misunderstood that if 1% of a given CFA accomplishes 15% density reduction, then that 2% of the same product would result in 30% reduction. But, this is usually not the case. In fact the more one adds, the farther they might find themselves from their goals as the density creeps upward. So, it is best to determine the level of CFA that can be fed uniformly and accomplish controlled performance with the equipment.
Barrier Screws Should Not Be Used:
The Pp Woven Manufacturers In Chennai recommends not to use barrier screws as they will work against the foam process and they will act as the decompression zone thereby causing early cell generation or gas loss resulting in unattractive blow outs or poor density reduction on the sheet surface.
Bell-Shaped Temperature Profile:
When extruding with foaming agents under sufficient internal barrel pressure, the glass transition temperature of the polymer gets reduced. It is often difficult to convey this fact to the uninitiated, but the gases released by the plasticizers thereby decreases the viscosity of the polymer. So, the melt temperature at the exit should be minimized to allow the expansion without distorting the shape.
Thus, the best carton box manufacturer in chennai has given a clear picture of all the above tips for maintaining foam sheet extrusion as they deliver various productive projects in the industry.
