Folding carton and corrugated converters will find equipment displays and educational opportunities in die-cutting, foil stamping, embossing, and more.Read more
How well do you understand the relationship between your films and your corona treater?Read more
EVOH allows conversion from foil and metallized film laminations to co-extruded barrier films.Read more
Mark Miller helps you identify the right material selection for tooling that will carry fluid to your substrate.Read more
News | New Products
ECG seminar will feature a wide range of topics and break-out sessions
The Novamelt location in Germany, where hot melt p-s adhesives are produced, is expected to play a key role in the integration of the two companies
According to a study from the Corrugated Packaging Alliance, shipping in corrugated containers saves 10.4 percent annually compared to RPCs
The 2015 North American Paperboard Packaging Competition, which recognizes excellence through the entire converting process, is accepting entries
A recent show in China was the occasion for the introduction of the modular ‘Concept’ and a carbon fibre chamber doctor blade
Visit Booth 205 at Kansas City Convention Center April 27-29
The new event, which will focus on processing and packaging technologies serving the food and beverage areas, will launch in 2017
Directories | Reports
PFFC brings you exclusive White Papers from our online sponsors.
Visit Kelly on Static from Static control expert Dr. Kelly Robinson, president of Electrostatic Answers; Kelly has 27+ years of experience in problem-solving and consulting.
Visit Tim's Web Lines to handle and wind your paper, film, foil, and similar products. Take advantage of Tim’s 25+ years just like over 100 converters have.
Visit Mark's Coating Matters from fluid coating expert Mark D. Miller; Process improvement and project management for precision roll-to-roll coating applications.
Visit Marketing Mojo for dynamic marketing insights from Stephanie Millman that inspire new ideas on how to stay on top of your customer’s mind.
Visit Yo’s Yarns to share the thoughts, impressions, experiences, and news that impact the converting industry. . . or anything else that happens to be on her mind!
Visit Tom's Poly Ploys, where Tom will be writing on various topics that the typical polymer processor would encounter on the job.
- July 01, 2013
He indicates no corona treating at all in the process and that the screw diameter is 60mm, the screw length is 30D, and die diameter is 300mm. Further, the PE processing temperature is 155-170C, while the PP processing temperature is 190-220C. He goes further to say that one extruder zone overshoots from a setpoint of 165C to 200C. The pricing of his film does not allow the use of slip or anti-block.
In the absence of two-side corona treating or contaminated resin, the blocking is due to inadequate cooling of the film. In essence, it is a heat transfer problem. This converter can raise the height of the cooling tower (if possible), slow down the line speed (not always desirable), or reduce the film thickness (not typically allowed). More air flow and probably better air distribution and a lower air temperature are required, in particular, a lower temperature of the mandrel for improved cooling of the inner layer is needed (since this is where the blocking occurs).
I find in many developing nations that the use of chilled air is not common, especially in fledgling companies. Cooling of the molten plastic is critical for many reasons, not the least of which is physical properties, followed closely by clarity and blocking.
I hope everyone is having a great summer.