Why cast films are providing greater advantages than calendering film.
Monomeric polymeric vinyl.
Polymeric vinyl films cast vs.
What do monomeric and polymeric mean.
Vinyl polymers are the most common type of plastic.
What is polymeric vinyl.
An industrially important example is vinyl chloride precursor to pvc a plastic.
Such as durability conformability etc 3.
Polymeric vinyl lasts longer than monomeric vinyl in outdoor conditions and therefore is more expensive.
Cast films are considered the industry premium as films are ideal for complex surfaces such as vehicles and contoured surfaces.
Now that we understand plasticizers we can tell a lot by the names given to the two types of calendered film.
The presentation can give some clues for the following queries 1.
It is located in the carbon backbone of the polymer.
Vinyl polymers are a group of polymers derived from vinyl monomers of the type ch 2 chr.
In chemistry vinyl or ethenyl abbreviated as vi is the functional group with the formula c h ch 2 it is the ethylene iupac ethene molecule h 2 c ch 2 with one fewer hydrogen atom.
Currently there are two types of plasticisers used these divide the calendered vinyl s into two distinct groups monomeric and polymeric.
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To summarize mono means one poly means many and meric means body or unit.
Monomeric vinyl is polyvinylchloride pvc polymer which is quite a hard material that is not very pliable so plasticisers are added as well as colour pigments uv and heat stabilisers as well as fillers and processing aids then this whole chemistry set is mixed up heated up until pliable but not mouton and fed through high pressure rollers.
In popular usage vinyl refers only to polyvinyl chloride pvc.
Their backbone is an extended alkane chain ch 2 chr ch 2 chr.
In machine direction and cross machine direction.
Why monomeric vinyl films are lower durability than polymeric.
The carbon backbone is made out of carbon atoms bonded covalently with each other.
The name is also used for any compound containing that group namely r ch ch 2 where r is any other group of atoms.
There are no double bonds found in the carbon backbone since the double bond is broken in order to make the monomer reactive in the polymerization process.
Calendering vinyl films 2.
Polymeric vinyl is the repeating unit of a vinyl polymer.
Both types of calendered films perform slightly differently in one direction than the other i e.
