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Blogmaster: Dr. Eldridge M. Mount III

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From the Archives

02

Inspection and sorting vs. control charting

Posted by Eldridge Mount on February 2, 2012
I have been discussing control charts with a few people lately and I thought it a good time to recall why we control chart.  In general we control chart to determine if a process or product property is in control and there fore suitable for the customer or next production step if the part is be...

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16

Embossing during film orientation

Posted by Eldridge Mount on December 16, 2011
Embossing during film orientation
I have received a question about the possibility of embossing a film between the MD and TD orientation steps and how it might be done.  This is an interesting question which I have not considered before.  It should be possible and the embossed pattern will survive the stretching step. ...

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21

Impact of orientation on moisture barrier

Posted by Eldridge Mount on October 21, 2011
Impact of orientation on moisture barrier
In a comment to the “Measuring pinhole resistance of packaging” post, I was asked about the impact of OPP film thickness on shelf life and in the post “OPP thickness and product freshness” I discussed the impact of moisture barrier on shelf life.  While most OPP film is ...

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16

Orientation in Films-Part 2

Posted by Eldridge Mount on October 16, 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 (cheap)...

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11

Orientation in Films: Part 1

Posted by Eldridge Mount on October 11, 2011
Thought I would begin 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, two in the plane of the film and the third through the film.  For ou...

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23

How do tie layers work?

Posted by Eldridge Mount on June 23, 2011
I have been asked what is the role of Tie resin, and how does it increase the bonding between layers? Tie layers are chemically modified resins which have chemical groups attached to the base resin.  Typically the chemical added to the polymer is Maleic anhydride, a cyclic dicarboxilic  ...

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21

Oxidation of aluminum layers in metallized films

Posted by Eldridge Mount on April 21, 2011
Oxidation of aluminum layers in metallized films
In an earlier post about metallized film surface energy, I discussed the oxidation of an aluminum surface to form aluminum oxide as it exits the metallization chamber. I will expand on that here a bit. I am using as a resource the AIMCAL Metallizing Technical Reference, 4th Edition, Co-edited by Cha...

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18

PET film coatings for maintaining the surface energy of the films

Posted by Eldridge Mount on April 18, 2011
“What types of coatings do the PET films producers use for maintaining the surface energy of the films?” Answer: I assume from this that the questioner means the surface energy of the metallized surface for subsequent converting.  Working off this premise we will focus on the sou...

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05

Antimicrobials in food packaging

Posted by Eldridge Mount on March 5, 2011
I was recently asked about an inline application on press for printing or application of an antimicrobial coating for packaging films. The question is; can it be done, and if so how and what materials, and is a barrier layer needed? There are many antimicrobial materials available for coating and e...

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03

Aluminum corrosion by sauces

Posted by Eldridge Mount on March 3, 2011
Question 1: I’m just wondering why a particular packaging use for sauces requires a structure of Pet12/alufoil 9/Pet 12/Pe 85. Does the additional pet film substrate between foil and Pe serve as an additional barrier or for additional stiffness? Reply: I would suspect that the ext...

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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