A properly designed machine has no unnecessary parts. Anybody who makes coextruded multilayer plastic films will tell you a simple monolayer plastic film is sooo 1970 ! Getting coex specified is a barrier to entry to monolayer film producers. Complex is sexy. Simple is boring. Problem: There is an interdependency between the layers. If something goes awry with …
The shortest route to a good sustainability scorecard is source reduction. New resins get the job done using less wall thickness in packaging applications. There is a definite trend towards using less, albeit slowly. So what is holding back adoption of thinner packaging even after the efficacy of a thinner package has been proven through …
Asking for ” regular poly” film is like asking for a regular car, beer, soda, tape or wine. The variation within the species of polyethylene film resins has evolved because different PE resins are made to do different jobs. Just as one would not use a subcompact car to do the same job as a passenger …
What is Regular Poly Film? is an oversimplification Read More »
Polyethylene blown film does not have to be inconsistent. If your low priced PE film is inconsistent within the same lot, your blown film supplier probably has used off-grade resins to save money on their major cost: PE resin. The thinking is “the customer won’t know the difference.” You do know the difference because the …
EVA and PEVA are both acronyms for Ethylene Vinyl Acetate. Somehow the P for polyethylene was added to create the acronym “PEVA.” To make EVA copolymer, Vinyl Acetate Monomer or “VAM” is copolymerized, or conjoined with Ethylene monomer to make Ethylene Vinyl Acetate. EVA copolymer is made in varying percentages from 2% EVA, 4% EVA, 6% …
Greenwashing is ubiquitous. Claims of plastic biodegradability are vague and play into the public’s emphasis on end-of-life. The FTC lags in prosecuting specious claims and only prosecutes the most flagrant offenders. http://www.ftc.gov/bcp/grnrule/guides980427.htm So how can one make an informed decision about ostensibly eco friendly biodegradable plastic without a 3 hour course on confusing biodegradability standards …
The properties of polyethylene are most affected by the density of polyethylene. Without going into the vagaries of molecular weights and molecular weight distribution, there are 2 key polyethylene properties which are a function of density. They are secant modulus ( a fancy word for stiffness or softness ) and heat resistance. The lower the density, …
Carbon specs in polyethylene LDPE film are inevitable. I had to explain this to yet another prospective customer who has a zero tolerance for carbon in film. When simple hydrocarbons are exposed to prolonged heat, they become carbon when overcooked. PE resin which gets hung up in the extruder eventually becomes carbon. From time to …
In addition to the cliche supply and demand, the price for plastics depends on the factors of feedstock, or monomer, pricing and exchange rate. UPDATE February 13, 2021: Supply is trumping the other factors these days. Plastic processors are busy, export is good and a major plant in Mexico is down because the Mexican government …
Phone: 314.968.1135
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