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Blogmaster: Dr. Eldridge M. Mount III

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05

Orientation in Films-Part 2

Posted by Eldridge Mount on January 5, 2011
 In my first post on orientation I promised to discuss relative levels of orientation in blown and tenter films and how to interpret the various orientation measures we can make easily. Relative levels of orientation can be measured many different ways both sophisticated (expensive) and easy (...

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27

Orientation in Films: Part 1

Posted by Eldridge Mount on November 27, 2010
Having discussed crystal and amorphous orientation, I thought I would expand the topic  with a discussion on film orientation.  Orientation is the alignment of polymer chains in a film in particular directions in the film.  In general there are three primary directions we consider, tw...

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25

Amorphous Orientation

Posted by Eldridge Mount on November 25, 2010
Amorphous Orientation
While I have been discussing crystal orientation for the last few blog postings, of primary importance to the physical properties of the film, and in particular the mechanical properties, is the amorphous orientation. Indeed, for some oriented polymers such as polystyrene (PS), polyimides (PI), poly...

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23

Moisture effect on substrates

Posted by Eldridge Mount on November 23, 2010
I had a recent e-mail question from a friend about a bond pull on a structure which had been immersed in water for some time. During the test, the bone dropped with time and the nature of the failure changed as did the level of the bond strength. This made me think that I had never spoken to this s...

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15

Aroma barrier of metallized films

Posted by Eldridge Mount on November 15, 2010
In an earlier post, I stated that the addition of a vacuum-deposited layer of aluminum onto an OPP film does not guarantee an improvement in flavor and aroma (chemical) barrier. I first discussed this in an SME barrier conference in 1997 and later the expanded work was published in Mount III, Eldrid...

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09

Chemical barrier of metallized films

Posted by Eldridge Mount on November 9, 2010
Recently while discussing metallized films, the person I was speaking with said that he was surprised that aluminum does not guarantee addition of chemical barrier. As from what he knows, aluminum is the “best barrier." However, his understanding may be the difference between a foil and a vacu...

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28

How can we coat and dry cast film (e.g. CPP) with a water-based coating...without distorting it?

Posted by Eldridge Mount on October 28, 2010
The answer to this question is much like my last post on handling mono and biax-oriented films.  The coating and drying processes are straight forward and should be easily applied to CPP or other “weak” films.  The goal is to coat and dry without exceeding a couple of key film ...

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25

Handling mono- and biax-oriented films

Posted by Eldridge Mount on October 25, 2010
I was asked if I have ever compared the handling and performance of mono- vs. biaxially-oriented films? In a way, yes, I have, but in fact not directly. What does that mean? The handling behavior of films is controlled by several factors which make the comparison approach universal but the det...

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19

Why are PP and PE not compatible?

Posted by Eldridge Mount on October 19, 2010
I was recently asked,"Why PP-PE are not compatible, and what is the layer-blending chemistry criteria? I.e Nylon + EVOH need no Tie but Nylon + PP or PE or EVOH + PP OR PE need Tie resin for the multilayer-extrusion process."I'm not sure if anyone really knows why PE and PP are not compatible as com...

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Blogmaster

Eldridge Mount photo Dr. Eldridge M. Mount III

Dr. Mount is an independent consultant in the coextrusion, extrusion, film, metallization and film converting industries. He is a leader in the development of metallized films for barrier applications and film laminations. His expertise is in oriented film product and process research, the design and implementation of extrusion systems and coextrusion die specification and system specification including installation and start-up. He is also recognized for trouble shooting mono and biaxial orientated film and sheet coextrusion, melt casting and melt pinning, and film surface treatment by corona, flame and plasma systems. EMMOUNT Technologies, LLC offers consulting and technical training in film orientation, barrier technologies, coextrusion and extrusion and measures polymer melt viscosity with a capillary rheometer.

Eldridge has over 30 years industrial experience in the extrusion and orientation of polypropylene and polyester films at ExxonMobil Chemical and ICI Americas Film Divisions. He managed the intellectual property of Mobil Chemical Films Division and has courtroom experience as an expert witness. A frequent contributor to SPE ANTEC, AIMCAL and TAPPI conferences, he is a member of the SPE Extrusion Division Board of Directors, and a Fellow and Honored Service Member of SPE. Appointed AIMCAL Metallizing Consultant in 2001 and a past VP of the Society of Plastics Engineers. He has a Bachelors degree in Chemistry from West Chester University and a ME and PhD in Chemical Engineering from Rensselear Polytechnic Institute.

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Eldridge M. Mount III

EMMOUNT Technologies, LLC

Beth M. Foederer

Optex Process Solutions, LLC