Polycarbonate 1 4 Thick
Raelene
At TotalShield, we use polycarbonate to construct our shield rooms, protective barriers, and machine guards because it is an exceptionally strong material with outstanding ballistic performance. But just how strong is polycarbonate? How do manufacturers rate their products for ballistic resistance, and how do testing agencies and standards bodies classify the polycarbonate ballistic resistance?
Polycarbonate (PC) is a thermoplastic discovered in 1953 in both the United States and Germany. In Pittsfield, MA, Daniel Fox accidentally discovered it while working on a wire-coating material for General Electric. When Fox returned to his office, he discovered a transparent material that had been set overnight. (Reference).
While thicker single-layer polycarbonate products are available for certain industrial uses, this material is typically not transparent. Polycarbonate plate can be obtained in thicknesses of up to four inches, but this is commonly used as stock to manufacture parts or, in certain cases, as armor plating where transparency is not needed.
As you can see, as the thickness of the material increases, weight goes up and light transmission goes down. The polycarbonate cost also increases significantly as the material thickness increases.
For this reason, at TotalShield, we work with our customers to understand the nature of the threat their staff will be exposed to and to select a material that will offer sufficient protection while minimizing weight and cost.
Because of its longevity on the market, polycarbonate has been tested thoroughly by government agencies, militaries, industrial users, and manufacturers against several standards. There are many testing protocols, but they can be grouped according to the following categories:
At TotalShield, we are mainly concerned with the performance of polycarbonate under explosive and ballistic impact. However, other factors can come into play. For example, we have designed and manufactured explosive-resistant shield rooms, which must also be resistant to chemical exposure and/or high heat and flame.
Unfortunately, most of the commercial ballistic ratings for polycarbonate are based on its ability to withstand attacks by handguns or rifles. While interesting and illustrative of the outstanding strength of polycarbonate, they are not directly applicable to our customer base. However, because this is such a common way to specify polycarbonate ballistic performance, we will discuss it here.
Finally, H.P. White Laboratory, Inc. was an independent testing facility that developed its own testing criteria for transparent materials used in forced entry or containment barriers. H. P. White (HPW) developed a series of specifications that they described as:
This table shows that there is a wide disparity between different testing standards. This is mainly due to how many shots the material is subjected to, the distance, and how pass/fail is defined in the standard.
For example, a 1-inch thick sample of polycarbonate can withstand three shots with a .357 handgun under the UL 752 testing but is not rated to the same .357 caliber under the ASTM F1233 standard, which rates the material for five shots of .38 special caliber. Presumably, the 1-inch polycarbonate failed somewhere after shot number three in the ASTM testing, only achieving the HG1 level.
However, we should caution against extrapolating the ballistic resistance standards associated with bullets to general ballistic performance. Most industrial failures involve projectiles with masses larger than a bullet traveling at slower velocities. These relatively more massive, low-velocity impacts cause greater deflection of the polycarbonate and impart a relatively higher force on the framing holding the polycarbonate.
For example, we commissioned a third-party testing partner to test an acrylic sheet that was rated for UL-752 Level 1, which should be able to withstand the impact of a 158 grain 32 special round. This somewhat lightweight bullet (less than half an ounce) travels at high speed. However, the acrylic failed when we tested a more massive projectile weighing 8 ounces and traveling at a slower speed.
This is much more representative of an industrial ballistic impact. This might represent a plug ejected from a pressure tank or a bolt ejected from a centrifuge. Unfortunately, the ballistic testing standards are focused on bullet resistance.
For this reason, TotalShield develops and maintains our own proprietary testing archive and conducts tests for any ballistic failure mode outside the parameters of our current testing. By doing this, we ensure that our customers get the ballistic-resistant product they need.
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Because different greenhouses face different environments and climate conditions depending on their geographic location, one size does not fit all. There need to be different polycarbonate thickness options that can perform well in the different situations. This is why, in every project, you will come to a point where you ask yourself: how thick should polycarbonate be for a greenhouse like mine?
Fortunately, polycarbonate panels come in different thicknesses, typically ranging from 4mm to 25mm. The thickness you choose will significantly impact the insulation, strength, and cost of your greenhouse. With such a wide range of thicknesses, you are sure to find a polycarbonate sheet that truly fits your project well.
The thickness of the polycarbonate also impacts the strength and durability of the greenhouse. Thicker panels are more rigid and can withstand harsh weather conditions better than thinner ones. This becomes more and more important as the climate is becoming more extreme lately. Thicker polycarbonate sheets are less likely to crack or break due to hail, wind, or snow loads. You want to make sure to consider this if you live in an area prone to severe weather, as damage to the greenhouse can lead to significant losses.
The cost of polycarbonate panels is not just the upfront purchase price. You should also consider the long-term costs, such as heating costs in winter. Thicker panels, with their better insulation, can significantly reduce these costs, making them a more economical choice in the long run.
When you are considering how thick should polycarbonate be for a greenhouse, strike a balance between budget, potential forces that your greenhouse will endure, and temperature considerations. You may live in a warmer climate where heating is not a concern, but strong winds may be. Think about the entire year and what kind of weather conditions your greenhouse will face, in addition to neighbors, and impact risks that may come from them.
In the end, the goal is to create a space where your plants can thrive, and the right polycarbonate thickness is a significant step towards achieving that goal. With careful consideration and planning, you can build a greenhouse that not only meets your needs but also provides a rewarding experience.
Acrylit by Stabilit offers quality corrugated acrylic roof panels available in multiple colors and profiles. They are proven to last over 20 years, with a 10-year warranty against yellowing and delamination. The Acrilyt High Impact line has excellent resistance against inclement weather conditions.
Sheets of monolithic polycarbonate withstand temperatures at which many other plastics either melt or are easily destroyed. The sheets retain their optical and mechanical properties in the most unfavorable external conditions. They are characterized by the highest impact resistance, heat resistance, flexibility, as well as low flammability and low weight. It has a protective layer that absorbs ultraviolet radiation.
Multiwall polycarbonate offers countless design possibilities and uses within the architectural, agricultural, and interior design industries. Whether you need a lightweight roofing solution, help maximizing natural light in your greenhouse, or a spark of creativity for your next design project multiwall polycarbonate sheets can help.
Featuring a 0.2" thick rigid waterproof surface, this floor mat prevents sweat, spills, marks and dents from damaging your carpets and flooring. Sweat and spills will not seep through and can easily be wiped clean from this durable gym floor mat using warm soapy water, keeping your flooring clean and safe.
MegaMat protective floor mats are manufactured with incredibly strong 0.2" thick 100% pure polycarbonate, designed for heavy loads and 24/7 use. Due to the thickness and rigidity of the MegaMat, it will not bend, crack, cup, dent, discolor or curl, is long lasting and is suitable for use on both carpets and hard floors. Megamat exercise mats provide excellent long-lasting carpet and hard floor protection, ideal for home gyms and workouts.
CLEAR FLOOR PROTECTION MATTING - High-clarity durable polycarbonate ensures your carpets and floors remains visible whilst protected. Provides unobtrusive floor protection in your home gym, exercise area, or whilst working out in any room at home.
SMOOTH BACK FLOOR MAT - The smooth underside keeps the floor mat in place on all thicknesses of carpet and hard surfaces whilst providing protection against damage, spills and wear from exercise equipment and accessories.
TOUGH HEAVY DUTY FLOOR MAT - Made from 100% pure polycarbonate - an incredibly tough, rigid, long-lasting material. Polycarbonate is the most durable plastic material offering excellent carpet and floor protection, especially with fitness equipment and exercise accessories.
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