Home/ Industrial Plastics/ Plastic Names, Translated
Buyer’s Guide

You asked for Lexan.
We know what you mean.

Half the plastics industry goes by a brand name, a nickname, or whatever the last guy called it. None of that is a problem at our counter — but it helps to know what you are actually buying. Here is what every one of those names means, and what we stock it as.

The Big Three
01

The three we get
asked about weekly.

If you only read one section, read this one. These three account for most of the confusion that walks through our door.

Plexiglass or acrylic?
Same material. Acrylic is the plastic; Plexiglas is a brand of it, like Lucite, Perspex and Acrylite. Nobody is selling you something different by using the other word. Acrylic sheet →
Lexan or polycarbonate?
Same again. Polycarbonate is the material, Lexan is a brand of it. It matters that you know, because polycarbonate and acrylic are not interchangeable — one takes a hit, the other cracks. Which one you need →
Foam board, or foam core?
Two different things, and it catches people out. PVC foam board routs, holds a screw and shrugs off water. Craft-shop foam core is paper over polystyrene and does none of that. PVC foam board →
Translation
02

Whatever you call it,
we know the one.

Every name we hear at the counter, what it actually is, and where to find it. Ask for the one you know — we will sort out the rest.

You asked forThat’sWe stock it as
Clear sheet
PlexiglassAlso Lucite, Perspex, Acrylite, Optix, “plexi” Acrylic (PMMA) Acrylic sheet →
LexanAlso Makrolon, Tuffak, “bulletproof glass” Polycarbonate Polycarbonate sheet →
Twin wall, multiwallAlso “greenhouse panel”, “the hollow stuff” Twin wall polycarbonate Twin wall →
Vivak, copolyesterAlso “the one you can bend cold” PETG In stock — clear, .030″ to 1/4″. Call for sizes
Acrylic mirrorAlso “plexi mirror”, “plastic mirror” Mirrored acrylic Acrylic mirror →
Sign & display board
Foam board, PVC foamAlso Sintra, Komatex, Celtec, Palight Expanded PVC PVC foam board →
Dibond, ACMAlso Alupanel, “the aluminum sandwich” Aluminum composite ACM / Dibond →
CoroplastAlso “corrugated plastic”, “yard sign plastic” Corrugated polypropylene In stock — 4mm white and black, 10mm white, 4×8. Call
Styrene, HIPSAlso “the thin white stuff” High-impact polystyrene In stock — white, .030″ to 1/16″. Call
Industrial & machining
DelrinAlso Sustarin, POM, “the one that machines nice” Acetal Acetal sheet & rod →
TeflonAlso PTFE, “the slippery white one” PTFE In stock — virgin sheet, 1/16″ to 1″. Call
NylonAlso Nylatron, Zytel, PA6, PA66, “the tan one” Polyamide In stock — call for grades and sizes
Tivar, UHMWAlso “the slippery one”, “chute liner” Ultra-high molecular weight polyethylene UHMW →
Poly, polyethyleneAlso “cutting board plastic”, “tank plastic” HDPE HDPE sheet →
Polypro, PPAlso Simona, FRPP, “the weldable one” Polypropylene Polypropylene & FR →
Garolite, canvas phenolicAlso Micarta, “the brown fabric one” Phenolic laminate In stock — 1/8″ canvas grade. Call
Urethane, poly sheetAlso “the rubbery one”, durometer 90A Polyurethane In stock — black 90A, 3/16″ to 3/4″. Call
Light panel, diffuserAlso “egg crate”, “the ceiling light cover” Prismatic acrylic panel In stock — .125″ prismatic, 4×8 and 50×100. Call
Kynar rodAlso PVDF, “the chemical-resistant rod” Polyvinylidene fluoride In stock — 1/2″ black rod, 48″ lengths. Call
ABSAlso “the matte black one”, “thermoform plastic” Acrylonitrile butadiene styrene ABS sheet →
Rigid PVC & the “vinyl” problem
VinylDepends entirely who is saying it PVC — or printed film PVC → — but in a sign shop “vinyl” usually means the film that goes on the board
Grey PVC, Type 1Also “the chemical one”, schedule 80 sheet Rigid PVC Rigid PVC →

Rows marked “call” are materials we keep on the floor that do not have a page here yet. They are stocked in Sparks the same as everything else — ring (775) 358-8211 and we will tell you what is on the rack and what it costs.

Why half of these are brand names

When a company invents a material and sells it alone for thirty years, its brand name becomes the word for the thing. DuPont’s Teflon did it. GE’s Lexan did it. Röhm’s Plexiglas did it so thoroughly that most people have never heard the word acrylic.

Then the patents expired, other manufacturers started making the same polymer, and the original brand name stayed stuck to all of it. That is why the word on your drawing and the word on our pallet often do not match, even though the sheet is the same.

It matters in exactly one situation: when the name hides a real difference. Plexiglass and acrylic are the same thing, so nothing is at stake. But acrylic and polycarbonate get used interchangeably by people who think both mean “clear plastic” — and one of them shatters. Foam board means two entirely different products depending on whether you are standing in a sign shop or a craft store. Those are the ones worth getting right, and they are the ones we will ask you about.

Still not sure what you have?

Bring the broken piece in.

You do not need to know what it is called. Bring the part, the offcut or the cracked panel to the counter at 745 E Greg St and we will identify it, tell you whether we stock it, and cut you a replacement. A photo texted over works too if the thing is bolted to a machine.

We have been doing this since 1979, which means we can usually name a material by the sound it makes when you tap it. That is not a service a website can give you, and it is the reason people drive out here instead of guessing on a catalogue site.

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Whatever you need — one piece or one hundred, a quick cut or a full fabrication run — we're here. Serving Northern Nevada since 1979.

745 E. Greg St. #6, Sparks, NV 89431
(775) 358-8211 · sales@silverstateplastics.com
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