Win Receive 2 tickets for 12th PLASTPOL, Kielce, Poland

>> Monday, 26 May 2008

There were no good answers, more there were no answers at all. The exhibitions starts tomorrow and if you would like to receive two tickets for…:

The largest exhibition in Central Europe

12th International Fair of Plastics Processing


27-30 May, 2008
Kielce, Poland

…just pass over the password: polymer processing at the checking desk and you should get it.

See you there!

Best regards,

Piotr S.


Books recommendation.

>> Saturday, 24 May 2008

There is a books recommendation widget on right as you have probably noticed. I would like to present full package and books are on of the puzzle in it. I only recommend publications which I know, read and come back. I have chosen from one of the affiliate programs and wanted to be the global one. It helps to present the book. The choice always belongs to you.
There is the last recommendation. When you search for books choose authors which are known experts because they represent quality. E.g. Johannaber Fredrich, Klemens Kohlgruber, Michaeli Walter, Osswald Tim A., Potente Helmut, Rao Natti S., Rauwendall Chris, Tadmor Zehev, White James L., Wilczyński Krzysztof and some more most of them are height professors and industrial experts in polymer processing.


PET (polyethylene terephthalate) processing.

>> Friday, 23 May 2008

This is huge subject. Many resins, many processes. I will focus on selected problems which can be interesting for packaging and one stage method, ISBM (injection stretch blow molding). In this way we had defined the resin, it will be bottle grade with intrinsic viscosity I.V. in range 0,76-0,84 dl/g .In the early 1940s PET was used for the first time in synthetic fiber application this is still on of its major uses. Bring over by checking yours cloths tag (polyester).
The most important is to understand polymer morphology. PET the one which comes in the bag has crystalline structure (temp. softening and melting point 250 dC) during injection step and rapid cooling then stretching and blowing we receive amorphous structure. The reason for it is that when we cool polymer chain can not position themselves to establish crystalline structure. When we consider the bottle which has the amorphous structure filled with hot water it will be softening from 60 dC (carefully with experiment because scalding).

Each step of the ISBM process has reflection in the product properties. Transparency because of amorphous structure that is rapid cooling. Good barrier properties come by biaxial orientation during stretching and blowing.


Masterbatch and polymer processing.

>> Thursday, 22 May 2008

I would like to analyze dyeing and it influence on polymer processing and the final product properties. The key point will be the crystallization. Thermoplastics we can divide into that with amorphous (irregular) and semi crystalline structure (regular) it means crystalline in some area and amorphous in other. Crystallization fallows through the nucleation process when crystals rise and grow.

Nucleation impacts on polymer processing and product properties by increasing:
• crystallization temperature (reduces cooling time in injection and extrusion molding up to 20%!),
• transparency,
• mechanical properties.

the reason for it is that we have more crystallization centers and fine grained structure opposite to large sferolits.

Everything would be ok if we had this knowledge otherwise it can happen that when we dye polymers e.g. with phthalocyanine pigments (blue and green colors) we will receive “natural” nucleation. There is one feature not always desired the shrinkage which comes with the regular structure of polymer. The general rules the darker color the higher nucleation with all adventures and disadvantages. The problem will come out when you produce the same item with different colors. Every time it is needed to correct the machine settings and it means: scrap, downtime, etc. We can find polymers (the described problem we can match e.g. with polypropylene the semi crystalline polymer) where nucleating agents eliminate the effect of nucleation from masterbatch.

Best Regards,

Piotr S.


Polymer Extrusion by Chris Rauwendaal.

>> Wednesday, 21 May 2008

This is a book which I do not have to recommend for people who are involved in the extrusion process. For those who are not just briefly one sentence. This book demonstrates how extrusion theory can be applied to actual extrusion problems such as screw design, die design, and troubleshooting. The recommendation can be the author achievements in the extrusion field in numbers of equations and patents.


Autodesk® acquires Moldflow®

>> Monday, 19 May 2008

One of the topics which will come back are simulations and engineering in the polymer processing this is the reason I could not pinch the comment that Autodesk® announces intent to acquires Moldflow® As I have noticed Autodesk® is active on this field lately. Moldflow® today is not only injection simulation software, CAE (Computer Aided Engineering) based on FEM (Finite Element Method) but offers process optimization, management and production control. This acquisition evidence of development in mold and plastic injection production and shows how plastics impact our life. Autodesk® sees it. CAD/CAM/CAE integration will not stop only on this tree systems in the way of full computer integration.


Polymers genealogical tree.

I like this picture. What do you think?


“Innovation in polymer processing”

>> Wednesday, 14 May 2008

It will be an information from Poland about past event the conference “Innovation in polymer processing” - science and industry partnership. For more information use sorry only polish. The reason I am writing about it is the Prof. James L. White person. One of the important person in the world’s polymer processing made a speech “Polymer Processing: Past, Present, Future” The subject says everything, we were experienced with the past of our industry and the evolution in process modeling (single / twin screw extrusion, and injection molding). It was not the only lecture this day. I would just mention that there were from both science and industry sites. Congratulation for students an interesting idea and perfect realization.

Photographer Kinga Kurowska, comes from

Dr. James L. White
The University of Akron

Professor of Polymer Engineering,
Founding Director of the Institute of Polymer Engineering,
Harold A. Morton Professor of Polymer Engineering

I would only recommend from Prof. James L. White an author of rheological equation known as White-Metzner fundamental publications from polymer processing as:


Cyclo Olefin Polymer

>> Thursday, 8 May 2008

I would like to interest you in thermoplastic engineering Cyclo Olefin Polymer. The reason I thought that you can find some application for it. For me what I see from the first study it is transparent, resistance for: acids, alcohols and fragrances and possibility to convert in various processing methods For more information please visit:


Polymer processing recommendation

>> Tuesday, 6 May 2008

I start with a new page element the new consideration called recommendation.
The first is a magazine about polymer and rubber called: British Plastics & Rubber.

Why? We can find information from polymer world on the web site, this is standard. What next? We find archive articles from the previous magazines, with download option, free of charge. Free of charge is the on-line version for current publication the print one is not. Advantage: clear categories, you will find what you need at the specific topic.


The glass polymer® processing

>> Monday, 5 May 2008

Not just about Eastman Chemical Company products but the trade name is perfect for properties of copolyesters. There is one more which I know SK Chemicals (in Poland known from PET installation) and maybe someone else but sorry if I skip it. Some information from chemistry. Amorphous transparent copolyester is produced by the reaction of terephthalic acid (TPA) with ethylene glycol (EG) which a certain amount of EG is replaced with cycloheksane dimethanol (CHDM). The most important factor is the proportion between EG and CHDM. When we increase the CHDM level we prevent crystallization, increase chemical resistant, transparency, and improve processability (lower melt temp., less restricted drying).
For the reason I am involved in polymer field I promote even I do not know about it polymers. The key point is to replace glass, on the other hand to replace polymers such as: PMMA, SAN, etc. in the packaging segment. These materials have some adventures comparing to copolyesters, primo there are cheaper per kg but it is not always the way we should go and it can draw to wrong conclusions.
There are not so many PETG commercial applications but I think there are notable. For those who are more interested please use net sources. When we compare to PMMA it is margin. When you take products from this two materials you will feel the difference not only in your pocket. PETG is heavy has higher density, maybe it will be subjective but it is more like glass this is what you can see, the effect. There will be better impact, chemical resistant, stress cracking, you can eliminate PP insert.
I have been focused just on packaging application and more on cosmetic and injection molded parts. On the other hand believe me even packaging can be technological challenge when we consider parts with wall thickness higher than 10 mm. There is a space for the most important what I wanted add, my own experience. This two suppliers offer grades known as extrusion blow molding and I suggest to take a shot and inject it. What we receive, lower material costs (this grades are much cheaper!) if we can not convince the customer in the other way. It is worth trying.


...and how it could have been started

>> Saturday, 3 May 2008

It will less serious than the last time. Would you decided what to do in life after seeing a movie? I think some of you have done it even me I wanted to become a sport’s agent, but it was before seeing “Jerry Maguire” directed by Cameron Crowe. Please enjoy episode from “The Graduate” (1967) about…


“...just one is a great future in plastics..." and all true.

What was yours first contact with plastics and what makes that you think about them? Maybe you remember the beginning?





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