Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. The low density form was discovered first, followed a few years later by the high density form. While polycarbonate roofing may not be the best option for an entire house; it is ideal for other structures such as decks, garages, patios, sheds, and conservatories. Polyethylene is known for its lightweightness, excellent durability and affordability. Refractive index refers to the rate at which light bends as it passes through the plastic of the lens. Polycarbonate Plastic. At first glance it might be hard to tell the difference between a polystyrene enclosure and a polycarbonate enclosure – apart from the cost of course. The geometry of a 6 pole truss connecting to a tilted hemisphere makes things "interesting". Weight, size, durability, and cost are the most important factors. Polycarbonate is also very lightweight and capable of withstanding extreme temperatures, either hot or cold. The most commonly used polyethylene plastics are high density polyethylene (HDPE), low density polyethylene (LDPE), and polyethylene terephthalate (PET). Plastic is a polymer that has a large molecular mass. Polycarbonate vs. Trivex Lenses: A Quick Comparison. Please Note: The information in this chart has been supplied by reputable sources and is to be used ONLY as a guide in selecting equipment for appropriate chemical compatibility. Polypropylene, also know as polypropene is a form of plastic just as polyethylene is. Growlist Updated 05/08/13. Faceshield visors are constructed from several types of materials. Our simple comparison below will help you decide which type of container is best for your kitchen and your budget! Today, polyethylene is commonly manufactured in several different forms with vastly different properties: 1. Several functions may not work. Polycarbonate panels are extensively used in a variety of applications. Plastic Material Selection Guide (at Curbell Plastics) Author: Curbell Plastics supplier of high quality thermoplastic materials, technical assistance, custom plastic fabrication Subject: What most important to the application? Below infographic shows more details on the difference between polycarbonate and plastic. Tuftex PolyCarb 2.17-ft x 12-ft Corrugated Clear Polycarbonate Plastic Roof Panel. When you compare polypropylene vs polycarbonate vs ABS luggage, there are several important things to consider. Moreover, Polycarbonate is durable and hard to break in comparison to plastic. 129. Deciding which size and shape is best for your kitchen will largely depend on your storage needs and space. High-index plastic lenses have a refractive index between 1.6 and 1.74; the index of ordinary plastic and polycarbonate lenses is … Food Storage Containers: Polycarbonate vs. Main Difference – PVC vs Polycarbonate. Compare; Find My Store. Temperature, cost, mechanical properties, electrical insulation, FDA, chemical resistance? Comparison of Pentax XW 7mm and Televue Nagler 7mm eyepieces, Part 2. HDPE plastic uses polyethylene as its base and is a high-density plastic used to make bottle caps, milk jugs and pipes for water delivery inside the home. Polyethylene is further broken down into weights or densities which is done so the plastic can serve a more specific purpose. Polycarbonate sheets can cost on average about 35% more than acrylic. As you can see, PP has the lowest density. These are typically the same sort of variables as available in polyethylene greenhouse plastic. Polypropylene, GatorChef is Your Stop for Commercial Kitchen Supplies, Why You Should Purchase Used Commercial Kitchen Equipment. According to their physical properties, polymers are divided into three groups as thermosets, thermoplastics and elastomers. The density of polyethylene can vary from a low of 0.857 g/cm3 and to a maximum of 0.0975 gm/cm3. Here is a brief comparison of polycarbonate and Trivex lenses to help you decide which lenses might be best for you: Thickness. Tuftex Multi-Wall 6mm Panel Clear 4-ft x 8-ft Corrugated Clear Polycarbonate Plastic Roof Panel. Polycarbonate panels are finding use in an incre… - Tooting his own horn a bit. Much like polyethylene sheeting, polycarbonate plastic has a number of options available. The key difference between polypropylene and polycarbonate is that polypropylene consists of aliphatic hydrocarbon chains, whereas polycarbonate consists of aromatic hydrocarbon chains. JB Friend me on facebook with JB_orchidguy@yahoo.com. Polycarbonate, polyethylene, and polypropylene. Your email address will not be published. The categories of Polyethylene are as follows. Polycarbonate is a tough, transparent plastic material with outstanding strength, stiffness, and impact resistance. It can also serve as a dielectric in high-stability capacitors. I think that Polyethylene is fairly soft compared to polycarbonate. When it comes to choosing the right food storage containers for your kitchen, the options can be a little overwhelming. Both PVC and Polycarbonate are good examples of thermoplastics. Polycarbonate is also frequently used for pool covers, or for roofing on industrial wareh… Read as we settle the argument once and for all! for pricing and availability. Polyethylene was first synthesized by scientists Reginald Gibson and Eric Fawcett in 1933 when they reacted ethylene with benzaldehyde under extreme heat and pressure. The higher the refractive index, the thinner the glass. Polycarbonate is sometimes called Lexan (trademarked name by GE Plastics) or Makrolon. Polycarbonate is a much more rigid, and also slightly more expensive, alternative to polyethylene. Community Forum Software by IP.BoardLicensed to: Cloudy Nights, This is not recommended for shared computers, NGC2264 (Cone Nebula) - ASI1600MM - MN190, Eq mounts becoming a thing of the past for dso astrophotography, Novice guide to matching cameras and telescopes. PE is too soft and it will warp from even moderate (140F) heat that you might get inside a car on a hot day. A plastic bag made with polyethylene. Polyethylene plastic is an inexpensive plastic material that is chemically resistant and can be very durable. Being a good electrical insulator and having heat-resistant and flame-retardant properties, it is used in various products associated with electrical and telecommunications hardware. You currently have javascript disabled. Polycarbonate is a type of plastic. Food Storage Containers: Polycarbonate vs. Because of its ability to be made in grades that are see-through, this plastic is commonly used as a less brittle glass alternative. Polyethylene can also be made from other feedstocks, including wheat grain and sugar beet. I didn't find a plastic ball (or hemisphere) that I really liked that was ~30" in diameter, so I ordered a spun aluminum hemisphere from a local machine shop. Polycarbonate Chemical Compatibility Chart: Check the chemical compatibility of Polycarbonate with various chemicals, solvents, alcohols and other products.. Shop Polycarbonate. Item #1100341. 16"? Be sure to check out what Gator Chef has to offer right here! Hello: It's also a dull-matte finish like frosted glass. These polymers are used for the production of a variety of items. 10-14-2006, 07:00 AM #2. pingman. Polycarbonate is made from Bisphenol A and phosgene monomers. Both types of polyethylene have a tensile strength between 0.20 and 0.40 Newtons per square millimeter, whereas polycarbonate has a tensile strength of 70-80 Newtons per square millimeter. Cheers If you use the inside of a PE ball as your form, the outside of the FG part will need little sanding and the PE will peel off easily when it is finished. Most polycarbonate panels are made with a composite build: a single corrugated polycarbonate sheet sandwiched between polycarbonate sheets. At Creative Mechanisms, we have used Polycarbonate in a number of applications across a range of industries. Some of the main pros and cons of polycarbonate panels are listed below. What Kitchen Equipment Will I Need To Open A Restaurant? A refurbish is in the future for my Eero2 and I'm attached to the scope enough to do it right, and polycarbonate, in spite of its price, seems to have the best of qualities. One alternative to both is to use the PE as a form and lay up a fiberglass part. Polyethylene Terephthalate (PET) – PET is known for its ability to be easily ther… However, commercial manufacture of polycarbonate capacitors mostly stopped after sole manufacturer Bayer AGstopped making capacitor-grade polycarbonate film at the en… Polyethylene plastic comes in a low density form and a high density form. Polycarbonate is a very strong and resilient thermoplastic material. Heck, I'm working on a 20"! Polyethylene serves as the basic ingredient for a variety of polyethylene-based plastics used to make everything from shampoo bottles and bleach containers to thin, plastic wrap. Polypropylene is made from propylene monomers. Learn more about how to choose between polycarbonate vs. acrylic. What Equipment Will I Need To Open A Bar? This is done during manufacturing. Key Difference – Polypropylene vs Polycarbonate Polypropylene and polycarbonate are two widely used thermoplastic elastomers or plastic materials owing to their unique combination of properties. 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