Music City plays host to converters attending the Flexographic Technical Assn.'s annual conference and exhibition.Read more
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
News | New Products
VpCI-126 EM UV film provides high-tech corrosion protection from aggressive environments and UV exposure
With a number of co-located events and educational features, the show promises many offerings for those involved in processing and packaging
All operating units of the company are now branded under the Constantia Flexibles in an effort to present a consistent, clear image to the customer
Labels from around the world are honored in a competition the head judge calls “the Oscars of the global label industry”
The new survey points to confidence in?the foodservice packaging industry for 2015, and there is optimism despite economic and environmental challenges
The event, coming in September, will co-locate with Pharma EXPO, and organizers expect an improving economy will bolster both shows
OpenColor 2.0 multichannel profiling software comes with extensive color correction tools and a test chart generator, plus many other new features
Directories | Reports
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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.