Questions/Answers

Question

Answer

In the film production the CaCO3 index D-97 is very important, this index affects thickness of final products, opacity and extruders service support.

When you add Masterbatch during thin film production with high dispersion index D-97 such problems like

• Clogging of filter screen inside extruder, 
• Increasing of abrasive machine effect, 
• When during production  of thin film addinf Masterbatch 10 micron and  less quality and physical properties is gone down may occur

The most accurate quality of CaCO3 is defined in labs in milling factory where specialists test moisture, whiteness, particle size distribution with special testers for example laser granulometer “Mastersizer” which allows to measure particle in the range from fraction of nanometer to the millimeter. Very few manufacturers have milling equipment and can control the whole process from start to final point. Very often manufacturers get ready-made CaCO3 which  is accompanied  by quality certificate which shows all necessary information including full analyze of particle distribution.

Usually manufacturers of Masterbatch point only D-50 index in quality certificate, brochures. But particle distribution in polydispersed materials goes unevenly. If according to certificate of quality Masterbatch has D-50 -2 micron most likely D-97 will be more than 10 micron and then during film production the above problems may have. After Masterbatch production detailed lab analyze of D-97 can’t be made.

We would like to note that you can find the approximate index of D-97 at you factory by yourself by reducing film thickness and/or installation of mesh filters with smaller mesh size.

For example:

1.  You use filter with mesh size 20 micron and at times service and clean filter mesh. Please try to change filter with mesh size 15 micron and if as a result interval of clogging filter screen between service sharply reduce so most likely the index D-97 is in the range  from 20 to 25 micron or slightly higher.
2. Using masterbatch during production of 10 micron film, configure your equipment for production 15 micron film and if you find instability of sleeve blown bubble or microhole in final product so most likely D-97 is in the range of 15-20 micron.

In principle Masterbatch with dispersion index D-97 to 20 microns can be used in production of film less than 17 microns but at times quality questions and/or process instability may occur.

To avoid these problems technologists have to:

• Reduce capacity of equipment
• 
  
• Reduce input rate of Masterbatch
• 
  
• To exclude from the range of products thin films

As a result production and economic efficiency of factory is decreased

But we have solution to this issue:  the high quality Masterbatch Polymel ME- 80 with dispersion index of  D-50 = 0,6 micron and D-97= 5 micron it is one of the best deals on the market.

Even now a number of manufacturers who use our Masterbatch Polymel ME- 80  successfully produce films with thickness from 5 micron and if you want:

• Improve the quality of your products
• Increase the input rate of Filler masterbatch and due to that reduce cost of products
• Reduce negative effect of Masterbatch on equipment
• Expand the range of manufactured films

And thereby increase the competitiveness of your production order our Masterbatch Polymel ME- 80