Mark Miller helps you identify the right material selection for tooling that will carry fluid to your substrate.Read more
Product and Technology of the Year Awards praise Hazen for Titleist golf ball sleeves and cartons and SAM N.A. for slot die with internal …Read more
Web handling expert Tim Walker offers three options for this machine direction folding process.Read more
Marketing expert Mark Lusky offers 3 tips to help you rev up your reputation and credibility in the marketplaceRead more
News | New Products
The Solution Coating Technical Center will offer customer trials and demos, toll coating, and R&D for the coating industry
The Tau 330 UV inkjet digital label press is said to provide up to 2 hours of uninterrupted printing, fewer changeovers, and less downtime
The DSS Compact Coex die is said to provide many benefits with less height and weight
The SPI Automatic Film Splicer performs non-stop film changes in food and beverage packaging operations
Attendees at the Spring meeting will have the opportunity to tour International PaperBox and learn about the company’s best practices
The PrimaPak package for Kar’s Nuts Second Nature Wholesome Medley is a silver winner in FPA competition
The association’s agenda includes a series of conferences and meetings to provide education and recognition to members of the narrow web industry
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.