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Blogmaster: Dr. Eldridge M. Mount III

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23

Solubility Parameters

Posted by Eldridge Mount on May 23, 2012
In an earlier post about PE and PP compatibility, I discussed solubility parameters in relationship to the mixing Enthalpy.  A good discussion of the suability and a listing of solubility parameters is in the “Polymer Handbook; Second Edition” by H. Burrell, starting on page IV-337 ...

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Posted in: Basics
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19

Why are PP and PE not compatible?

Posted by Eldridge Mount on May 19, 2012
I was 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 multi layer extrusion process. I am not sure if anyone really knows whey PE and PP are not compatible as compared to sma...

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15

Comment from Mangesh Padalkar

Posted by Eldridge Mount on May 15, 2012
Comment from Mangesh Padalkar about Poor aged bonds in PE/foil adhesive lamination: I do agree with the answer. If the poly film does not have sufficient HDPE in middle layer, after lamination, slip additives got absorbed toward adhesive layer, thus reacting with isocynates and failure in bond str...

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Posted in: Questions
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15

Chill-roll deposits

Posted by Eldridge Mount on May 15, 2012
Casting roll build up is common in most film processes and will have to be cleaned at some point.  The level of the deposit can be controlled to some extent and it is a function of, melt temperatures, additive package, casting roll surface finish, cast roll temperature and the melt pinning proc...

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24

Poor aged bonds in PE/foil adhesive lamination

Posted by Eldridge Mount on March 24, 2012
Question: A reader wants to know the reason for a low bond strength between PE film (lamination grade 120µ, 38+ dynes, COF F/M - 0.20 (dynamic) and Aluminum Foil after 24 hrs where green bond was OK. They used a high-performance solvent-based adhesive and PE film produced 3 months ago. After...

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Posted in: Questions
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23

ANTEC 2012

Posted by Eldridge Mount on March 23, 2012
ANTEC (ANnual TEChnical conference of the Society of Plastics Engineers) will be collocated with NPE this year in Orlando Florida.  If you can make it I would recommend the meeting as an excellent source of technical information for many different polymer technologies. You can check the progra...

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Posted in: Background
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22

Recent quiet times

Posted by Eldridge Mount on March 22, 2012
Hello and sorry for the recent quiet on the Blog. I have been both out of my office and out of the country working in several plants on several programs, so long days and work focus. I should be home in a week or so and will be getting back to a more normal frequency. Thanks for your underst...

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Posted in: Background
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01

Film barrier vs. package barrier

Posted by Eldridge Mount on March 1, 2012
In a previous post I promised to discuss how to compare film barrier results against the performance of a sealed bag? The best way to determine the relationship between sheet barrier properties and the protection provided by the sealed bag is in my estimation to measure the concentration of the pe...

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Posted in: Background
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24

An Hermetic Seal Test

Posted by Eldridge Mount on February 24, 2012
In order to test package barrier it is important to have a film and sealing mechanism capable of producing hermetic seals.  The question which arises is how would you test a film and lamination for hermetic seal performance and in particular the seal jaw range over which you can achieve a herme...

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20

Poor stretching of skin layer

Posted by Eldridge Mount on February 20, 2012
Poor stretching of skin layer
In an earlier post, I talked about the need to have coextruded layers which are compatible in terms of orientation behavior.    The figure attached to this post shows a little bit of what I mean.  In this instance a PP film was being produced with an EVOH skin layer.  In thi...

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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