What is the Strongest Plastic – Polycarbonate Sheet?
Many plastics are durable and have good impact strength. Acetal Copolymer – Acetal Homopolymer for example is a very durable and strong material, but compared to some other materials the impact strength is lower. The Acetal is the best machining plastic around, it is used to make long lasting and good wearing parts for machines. Another great plastic that holds up to wear and tear is UHMW. With its high molecular weight and low friction resistance is ideal to take abuse over long periods of time.
However, one of the strongest materials in the plastic family is Polycarbonate. Commonly referred to Lexan® (SABIC) or Makrolon® (Bayer) Polycarbonate Sheets; Polycarbonate is by far one of the strongest (highest impact resistant) plastic materials, and is warranted against breakage. With its high impact strength, it is ideal for jobs were the ability to absorb abuse is a factor and in some cases may even need to save lives. A common material for high impact is Polycarbonate Sheet and Plate, but amazingly also Polycarbonate Rod.
Polycarbonate Sheets considered ‘unbreakable’.
Polycarbonate sheet is a valuable plastic due to its impact strength, temperature resistance and wide range of uses. It is commonly confused with Acrylic or Plexiglass which has similar properties but Polycarbonate is 25 times stronger and has a wider temperature range. Acrylic is better used for display purposes and is a brittle material. Polycarbonate is so strong that you can drill or hammer a nail right through it without breaking the material. It also can undergo large deformations without breaking while Acrylic cannot. Polycarbonate also can be used for electrical applications because it is a great insulator. It also has great safety properties due to it being flame retardant and because it has good heat resistance. Another way Polycarbonate exhibits its safety properties is through bullet resistant glass. Polycarbonate is the most commonly used material for bullet resistant glass, riot shields and face masks. In these situations, the Polycarbonate has a very high impact strength which is invaluable. It protects and saves lives and is able to stand up to abuse in dangerous situations.
Polycarbonate Has Many Uses
From audio CDs to Blu-ray discs, airplane canopies to protective eye gear, Polycarbonate is a great thermoplastic (a material that can be formed and returned to its original shape) material for many different applications. Because of its impact strength and wide range of uses, Polycarbonate makes an ideal material for those who need peace of mind when designing or fabricating and need it to hold up to abuse and be virtually unbreakable. Polycarbonate is one of the toughest plastic materials around and everyday new products are being made from it. Whether using it for electrical, optical or for its impact properties, Polycarbonate is an ideal choice for many plastic needs.
Polycarbonate sheet (Makrolon) is available from .032″ – .500″ thick
Polycarbonate Plate, Slab, Block is available up to 4.0″ thick
Polycarbonate Rods are available from .250″ – over 8″ diameter.
Not all Polycarbonate Sheet or Plate meet all approval ratings. Zelux Polycarbonate Plate is available in a machine grade and an optical grade. Zelux Polycarbonate Rod is also available – as a machine grade rod – not optical.
Typical Polycarbonate Resin Properties:
General Property
ASTM Test
Typical Value
Specific Gravity
D792
1.2
Tensile Strength Yield
D638
8,900 – 9,000
Tensile Modulus
D638
340,000
Izod Impact – Notched
D256
12.0-16.0
Hardness – Rockwell
D785
M70
Deflection Temp @ 264psi
D648
270
Deflection Temp @ 66 psi
D648
280
Co. Thermal Expansion
D696
3.7X10-5
We stock a large variety of thickness and sheet sizes in Makrolon GP sheet. For more information on this or other plastic sheets, please call us at 866-832-9315 or click here to contact us.
Which Plastic Sheet or Rod Material is right for me?
Mechanical Acetal Sheet
This not an easy question to answer. Several different factors come into play when choosing the right plastic for your application. Temperature, strength, exposure to the elements and even time spent at elevated temperatures are just a few factors to consider when choosing the right plastic for a particular project or job.
Picking the right plastic for your application is critical for its success and longevity and needed to insure that the material doesn’t fail in critical situations. From the onset it may take a bit of time to choose the right plastic material, but will ultimately pay off in the long run. Simply choosing the cheapest plastic sheet or rod may spell disaster for your project.
Many plastics are resistant to chemical attacks. Some plastics however are not. Two examples of plastic that have low resistance to chemicals are Acetal Copolymer and Nylon. Acetal and Nylon are both a great machining plastics with excellent wear resistance and impact strength. However, when exposed to chlorine or alkaline they tend to become brittle which can cause failure and if used in such instances as plumbing, can lead to major problems such as flooding. Nylon does have good resistance to many chemicals but will degrade when exposed to acids especially sulfuric. A plastic that would work better for applications involving the use of chlorine or acids is UHMW. UHMW has some of the same properties as Acetal such as wear resistance, ease of machining and are both self lubricating. UHMW often is an alternative for Acetal and Nylon, especially when it comes to chemical attacks.
Many plastic sheet and rod materials to choose from
Another plastic that can fail if used in the wrong application is Acrylic. Acrylic is a great plastic for displays and decorative purposes and is a natural replacement for window glass. However, it is brittle and has very low impact strength as opposed to Polycarbonate. Polycarbonate is a great plastic for impact strength, probably the best in the plastic family. It is 25 times stronger than
Massive Selection of Performance Plastic Rod
Acrylic and this makes it ideal for bullet resistant glass and riot shields, while Acrylic would be useless for those critical jobs. However, Acrylic has better U.V. resistance than Polycarbonate Plastic Sheet which makes it better for use outdoors over longer periods of time because it is invisible to sunlight. Another plastic that cannot handle U.V. rays is Polypropylene. Polypropylene unlike Acetal has excellent chemical and moisture resistance. However, unlike Acrylic, it becomes brittle in sunlight and starts to craze or crack when exposed over a period of time while Acrylic would last many years longer. Even though Polypropylene is a very rigid and stiff material, with good impact and crack resistance, if exposed to the elements for a period of time, it will not retain its properties and a chemical chain reaction will cause the material to eventually fail. Polypropylene is great at handling chemicals and food applications which neither Acrylic nor Polycarbonate Sheet are well suited because for this application, because they don’t have good chemical resistance and the standard grades are not approved for handling food.
These are just some examples of the differences between plastic resins and it is important to note that just because one plastic works for one application, it may not work for another. All factors must be considered and taken into account, maybe even some trial and error. This will insure that your project will go smoothly and will be able to last through many years of use, saving time, money and patience.
Contact us for more examples of materials and the differences between specific items. Also, we have a great tool to help you in choosing the proper plastic material for your application, check out our free Plastic Material Selector Guide. We would also welcome your email inquiries or call us at: 866-832-9315.
There are hundreds of plastic manufacturers, and even more plastic sheet, rod and tube suppliers.
What makes one better or worse than another? Some of the biggest differences are in the quality of the materials they have in stock. Not all manufacturers are the same. Some produce very inexpensive materials for the disposable trade. A few supply high quality materials from the big names in the plastic industry.
We buy only from American companies. Our suppliers and warehouses are all here, in the USA. While several of our factories have parent companies in Western Europe, they manufacture the bulk of their materials here in the states. With the NAFTA requirements, we are able to provide certification to all our materials.
American Made Quality Makes A Difference
As you probably know, materials made in areas around the world don’t have the same quality control systems that we have here. We have seen materials from suppliers not in the USA or Western Europe, and have chosen to not carry any of these materials – they just don’t measure up to Made In The USA! We believe that that American Made still means something, and it transfers to the materials we supply.
Since 1975 we have partnered with the best manufacturers, with the best industrial, machinable, mechanical and professional grades of plastic materials available in the marketplace. Quality names like: Westlake Plastics, Ensinger Plastics, Gehr Plastics, Roechling Plastics, Polymer Industries, Spartech Plastics, Z/L Plastics, Plaskolite, and many, many more. None of these are suppliers are newcomers, most of our suppliers have been in business producing excellent quality plastic sheet and rod for over 50 years. We are the new guys, as we started in 1975!
Buy From An Establish Plastics Professional
Industrial Plastic Supply of Anaheim California
How can you tell if your plastics are ‘quality’ pieces of plastic? It is a bit tough to tell by just looking, and that is what the low quality suppliers and manufacturers count on. Sometimes the only way to tell is by cutting or machining a part. We have cut into materials that literally break when a saw blade comes into contact. Some materials have stress levels so high they bow significantly as we cut through the material. See article on Stress In Plastics.
These high internal stresses show up during machining as warping, changes in tolerance, large movement in part size and stress fractures. We have seen parts move by over 5% after part was machined and within 12 hours. This picture shows a piece of glass filled nylon from one of the ‘upstarts’ in the industry. As a test, we were cutting some strips. As you can see, the part has such a high stress level that it warped away from the rest of the sheet as we cut it. This is very dangerous for a person cutting or machining, as it can stop a blade or break free and strike an employee. We chose not to buy from this new company.
Plastic Sheet and rods Proudly American Made
We have been around the block a few times, and we know most of the things that will cause you problems in a material. That is why we only buy from the big guys, the high quality material manufacturers, the well known – tried and true manufacturers. We buy from the experts, the professionals, the leaders in our plastics industry. Supplying industrial grade plastics to machine shops may seem like an easy thing. We treat this process with the respect it deserves; your parts are important to you and your customers. We won’t let you down by providing unacceptable grades of plastic materials. Our parts aren’t stressed out!
Call on us today – 866-832-9315 and ask for a Plasticologist, or email us for more information about the quality materials we supply.
You know how bad it is when you get stressed out, with all the day to day challenges and issues? Well, plastics get stressed too.
The process of producing plastics into sheet, rod and tube is a stressful manufacturing process.
Stress free plastic manufacturing
The process to make a plastic sheet, plastic rod or plastic tube requires the plastic resin to be heated to temperatures of 350° – 500º to get the resin to flow through the machines.
The material is then pushed through a die at high pressure.
This heat and pressure cause many stresses to affect the plastic material.
The cooling of the plastic shape is critical
If the plastic cools to quickly, the surface cools and the center is still very hot, this is a major cause of internal stress.
Processed to quickly and voids or cold spots cause poor quality sections.
Processed to slowly and materials burn in the die and visible burn spots appear on the surfaces – bad material
Proper speed provides homogeneous material that has cooled at a uniform rate through the sheet yields a very low stress sheet
The stresses from this production can be very significant and can ruin your parts. One common prevention method is to anneal or stress relieve the raw material prior to machining, and may require stress relieving during machining if large amounts of material are being removed. The stress relieving process is a slow heat and cool process, contact us for details on your material or project.
Here is an example of a highly stressed plastic sheet, it is 1.250″ thick glass filled nylon sheet. The manufacturer sent us this sample to show the ‘quality’ of their material. We attempted to cut off a strip to do some testing, and you can see the results. This material warped so much it stopped our saw! We never did buy anything from this supplier.
Compression Molded Plastic Sheet and Brownies…
Nylon with huge amount of stress, cooled too quickly.
Yes, you read that right, brownies. I still remember the wonderful smell of my Grandma’s house when she was baking her special 2″ thick brownies. The smell was great, but I also remember the critical timing in the oven. She would open the oven and peek in, and close it quickly so as not to let the heat out. Then, when they looked about right she would open the oven and slip a toothpick into the center of the pan and pull it out again slowly. I can remember asking, “Grandma, why do you put in the toothpick into the brownie?”. The answer was, that the outside cooks quicker than the inside, and it takes a while to get the brownies to cook all the way to the center.Then, when they were all cooked, I would have to wait while they cooled. And, sometimes, if I didn’t wait quite long enough, when I would take a bit the center would burn my tongue. Ouch!
The interesting thing is, that plastics are about the same. Most plastics have a very low co-efficient of thermal conductivity (that is sure a mouth-full), which means that heat and cold don’t travel through the plastics well. This means that it takes a while to ‘cook’ the plastic all the way through, and not just the surfaces. And, just like my brownie story, the plastics take a long time to cool. If the outside of the plastic cools much faster than the inside, then large amounts of stress develop.
The process of compression molding of the plastic sheets is ideal for eliminating stress. The sheets cook slowly, so the entire sheet, including the center, is heated to a uniform temperature. The temperature is held at temperature to insure a fully cooked sheet (you can’t use a toothpick here). Then, over several hours, the temperature of the sheet and the entire compression molding press is lowered very s-l-o-w-l-y. This allows the center of the sheet to cool at the same rate as the external surfaces, and this yields a very stress free sheet. The premier manufacturer of this high quality compression molded sheet is Westlake Plastics. We have been a master supplier of the Westlake Plastic materials for over 35 years.
What should you do to eliminate stress?
If you are experiencing problems with your plastic materials, such as twisting, warping, ‘potato chipping’ or any other sign of stress, contact us. It is probably not your fault. There are dozens of manufacturers that produce engineering and mechanical plastic shapes, they are not all the same. During the production of materials, the process should include a secondary annealing step to remove stress from the newly product. By removing all stress from the sheet or rod you are insured of a ‘clean slat’ before you start machining or finishing. We only provide materials from top rated manufacturers, we truly care about the materials you receive from us.
If you have been experiencing problems with the materials you are getting from other suppliers, let us know, we can help eliminate your stress problems. E-mail us or call us at: 866-832-9315
Polyetherimide or PEI is the generic name for one of the popular engineering resins. The most common resin supplier for this material is Sabic Plastics (formerly known at G.E. Plastics). This amorphous thermoplastic material comes in two common resin varieties used in the production of plastic shapes, the first is Ultem® 1000 which is an unfilled – natural material, the standard color for unfilled PEI (Ultem Sheet) is a transparent amber. The second is Ultem® 2300, which is a 30% glass filled PEI resin, this resin is a creamy tan color. Several other resins are available, including different percentages of glass fill, black pigment or color, and a few high end specialty grades. Some members our our industry refer to Ultem® as the ‘ultimate’ in plastic materials. With some of the best available properties, this material out performs most plastics in critical applications. This material is certified to: FDA compliance, USDA, 3A and also USP Class VI for medical use. Polyetherimides have exceptional tensile and flexural strengths and excellent electrical properties. Ultem® resins have inherent flame resistance and are UL 94 5VA at .075″. Ultem Sheet and rod machines very well, and can be used at temperatures of 340 degrees continuous.
Polyetherimide – PEI is the Ultimate Resin
The Polyetherimide family of plastic resins really excel in the medical and pharmaceutical industries. These industries have incredible demands on plastic materials, and most plastics fail quickly. Ultem resins handle the heat, chemical, stress better than almost any other material. For complete technical data sheets and more information chick for data sheet page. Several of our major manufacturers produce Ultem® PEI resins into stock sheets and rods. Some trade names from these suppliers are: Tempalux®, Sustatec®,Unitem®and many more. Ultem sheet and rod has some of the best properties of all the available plastic materials. Some materials that have some similar properties: Acetal, Radel, PEEK, PTFE. Check the data sheets on each of these materials to help in deciding which material is appropriate for your application.
Rod is normally available in rod from .375″ – 4.0″ diameters, and sheets from .125″ – over 2.0″ thickness, and we stock many items for immediate shipment. Additional sizes are available on request, including larger diameters, thicknesses, molded tube, extruded shapes, strips and bars. Contact us for more details on this exceptional material. Email us or call us at 866-832-9315
When we think of plastic, we think of plastic bags you get at the grocery store or maybe your child’s toy that’s made out of cheap throw away material. If you stop and think about it, plastic is everywhere and it’s uses are almost infinite. Take Acetal Copolymer, it is a plastic that replaces metal in numerous applications and is used to make gears, screws and other hard working parts. Consider PTFE for instance which is used to coat your frying pan to make it non-stick, make steam valves and fittings, and chemical resistant parts. Another material is Polycarbonate or Lexan® (a SABIC brand name -formerly G.E. Plastics) which is used to replace glass because it is shatter resistant and is also used for bullet resistant glazing and riot shields. Even the cup of coffee you grab for every morning is made of foamed Styrene – Styrofoam. But plastic has shaped our lives in countless ways, many of them you might not even think of or notice.
Plastics play a big part in the world of medicine. Some other advancements in the area of medicine include assisting people with debilitating injuries and serious afflictions, helping them feel more comfortable and move easier. Prosthetic limbs and joint replacements have come along way since the old days of metal and wood. Since the late 90’s UHMW or (Ultra High Molecular Weight Polyethylene) has become the standard in hip and joint replacements. With plastics like UHMW, which has great wear resistance, excellent strength and very low co-efficient of friction (very slippery), it has made people who need these surgeries have better mobility and better quality of life. These plastics also make prosthetic limbs lighter and stronger for athletes who wish to compete and lead near normal active lifestyles due to the use of plastic polymers (derived from the Greek meaning ‘many parts’) mimicking human flexibility. Prosthetic devices date all the way back to the ancient Egyptians where they used leather and wood for toe and foot replacements. But thanks to today’s technologies and advancements in as plastic, most amputees and athletes can regain their quality of life and enabling them to do what they love.
What has Medical Plastic Done For You Lately?
Another plastic material that has changed the medical field is PEEK (Polyetheretherketone). This material is a newer plastic which has high chemical resistance along with excellent high continuous temperature resistance of up to 480 degrees fahrenheit. PEEK has replaced many metal devices in the medical field, because PEEK is one of the only thermoplastics (plastic which can be bent or shaped) able to withstand high doses of radiation over an extended lifetime. In addition PEEK is used to help many people awaiting kidney transplants because it is used to make a critical component in dialysis machines. These machines need to clean the blood over a period of several hours and because of this, PEEK is the natural solution, as it can be steam cleaned time and time again with little effect on the material. Along with its great chemical, temperature, and fluid handling stability, PEEK is USP Class VI, making it ideal for these types of medical applications. The natural color of PEEK is a beige to tan and is available in sheet and rod. One of the largest manufacturers of PEEK resin is Victrex and their 450G resin.
Plastics In Medicine – Everyday
Plastic materials have become apart of our lives and has changed the way we take care of the sick and injured, how we protect our foods from germs, and prolong the storage of foods. Plastics protect medical instruments and insure they are sterile. It has made people’s lives better in both the short and long term. It has helped reduce pain, gain better movement and has given people their confidence back. The values of plastic can not be understated and in the future, hopefully plastics will save or prolong many more lives through advancements in technology and the limitless possibilities it presents.
For more information on these and other medical grade plastics like: Clear Nylon (look for blog post on this), Ultem, Polysulfone, Radel and more, contact us. E-mail us or call 866-832-9315
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkPrivacy policy
