In electronic equipment, industrial control, medical equipment and many other fields, plastic enclosure with light weight, low cost, corrosion resistance is very popular, but it should be noted that not all plastic electrical enclosures are the same. Currently, PVC, ABS, and Polycarbonate are the three most widely used plastic enclosure materials, and each material has significant differences in service life, strength, and performance.
The article will analyze the performance characteristics of these three types of plastic enclosures in detail, and make a multi-dimensional comparative analysis of them to clarify the main differences between the three, providing a clear guide for custom plastic enclosures in different scenarios.
Polycarbonate plastic enclosure
Polycarbonate plastic enclosures are extremely impact resistant and are several times stronger than ABS enclosures. This makes it ideal for electrical equipment that needs to withstand high levels of vibration or physical shock, such as heavy machinery enclosures, utility equipment or safety enclosures.
It also has excellent transparency and heat resistance. They provide physical protection while providing a clear view of the internal components of electrical equipment, and are suitable for dashboards, windows and indicator enclosures. in terms of heat resistance, Polycarbonate plastic enclosures typically have a heat deflection temperature of 125°C to 130°C, which allows them to maintain their shape and function at high temperatures without easily deforming. In addition, Polycarbonate plastic enclosures are heat resistant. In addition, Polycarbonate plastic enclosure has good insulation, flame retardancy (UL94 V-0 rating) and weather resistance.
However, there are some limitations. polycarbonate is usually more costly than ABS and PVC, and its chemical resistance is relatively modest, making it unsuitable for use in chemical environments with long-term exposure to strong acids and alkalis.
ABS plastic enclosure
ABS is a combination of acrylonitrile, butadiene and styrene, which makes ABS enclosures a very practical plastic electrical enclosures.
ABS plastic enclosure has good mechanical toughness and impact strength, suitable for most daily applications and industrial environments.ABS plastic enclosure is also easy to process, which can be processed by injection molding, extrusion, blow molding and other ways, short molding cycle time, good fluidity, very suitable for the production of complex structures, large quantities of custom plastic enclosures. And ABS plastic enclosure material surface is smooth, no texture, easy to spray, plating, silk screen, laminating and other secondary processing.
ABS plastic enclosure also has some defects. First, its weather resistance is poor, long exposure to sunlight and ultraviolet rays will lead to embrittlement and discoloration, long-term outdoor use is not recommended. Secondly, its heat resistance is average, with a heat deflection temperature of around 90°C, making it unsuitable for use in sustained high-temperature environments. Finally, ABS plastic enclosure is opaque and has average flame retardancy.
PVC plastic enclosure
PVC (polyvinyl chloride) is a thermoplastic made by polymerization of vinyl chloride monomer, according to the addition of different types of plasticizers can be divided into hard PVC and soft PVC, plastic enclosure is mostly used hard PVC, they have enough structural strength and rigidity.
PVC electrical enclosures have excellent chemical resistance to a wide range of chemicals such as acids, alkalis, salts, alcohols and greases, making them ideal for use in corrosive environments such as chemicals, water treatment and electroplating. At the same time, PVC plastic enclosure has excellent weather resistance and UV resistance, even if the long-term outdoor wind and rain, sun exposure to the attack, its performance will not be significantly reduced, very suitable for outdoor applications, such as communication base stations, outdoor electrical box enclosure.
PVC electrical enclosure also performs well in terms of flame retardancy, it does not require the addition of flame retardants to achieve UL94 V-0 rating, which makes it very suitable for high fire safety standards, such as construction, transportation and other scenarios.
However, PVC plastic enclosures also have limitations. First and foremost, its heat resistance is poor.It begins to soften at 80-85°C and cannot be used in high-temperature environments. Secondly, it is easy to brittle in low temperature environment, easy to rupture by external impact, not suitable for cold areas or low temperature workshop. Finally, some PVC plastic enclosures will release harmful substances, its environmental issues need to be emphasized.
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Polycarbonate vs. ABS vs. PVC enclosure performance comparison
plastic electrical enclosures type | polycarbonate enclosure | ABS enclosure
| PVC enclosure |
Impact resistance | Excellent | Good | Poor |
UV resistance | Good | Poor | Good |
Chemical resistance | Poor | Poor | Excellent |
Flame retardant | Excellent | Poor | Excellent |
Heat resistance | Excellent | Good | Poor |
Costs | Highest of the three | Medium | Lowest of the three |
Decide whether to use polycarbonate enclosure,ABS enclosure or PVC enclosure
These three kinds of plastic electrical enclosures have no absolute advantages and disadvantages, only in specific application scenarios under the most suitable choice, the specific application of which enclosure depends entirely on your specific application needs.
Choosing polycarbonate plastic enclosure
If your equipment is subjected to extreme physical shock, frequent disassembly, or contains very delicate components; or if it is subjected to high temperatures (e.g. over 85°C) for long periods of time; or if the equipment requires transparency of the plastic electrical enclosures for direct observation of the internal state of the equipment, such as indicator lights, meter readings, and windows, then Polycarbonate plastic enclosures are the best choice for you. Polycarbonate plastic enclosures are your best choice.
Its common application scenarios are:
- heavy duty industrial equipment control box enclosure
- fire protection enclosures
- Violence protection enclosure
- lHigh strength instrumentation enclosure
- lAdvanced LED lighting enclosure
Choosing ABS plastic enclosure
When your custom plastic electronic enclosures need exquisite surface treatment, such as spraying, plating, silk-screen printing; or need good strength and toughness, but the working environment does not have extreme high temperature or continuous outdoor exposure, you can choose ABS plastic enclosure.
ABS plastic enclosure is mainly used in indoor or mild environments, cost-effective, and its common application scenarios are:
- household appliances enclosure, such as TV/vacuum cleaner/coffee maker enclosure
- enclosure for consumer electronics, such as printers/monitors/keyboards
- power tool enclosure, toys, luggage
Choosing PVC plastic enclosure
PVC plastic enclosure is your first choice when your equipment is exposed to harsh environments such as corrosive chemicals (acids, alkalis), salt water, or prolonged outdoor exposure to wind, rain, and UV rays; or when the application of the equipment has stringent requirements for flame retardance; or when the equipment is primarily required to resist harsh weather and chemical corrosion, rather than physical impact.
Common application scenarios for PVC plastic enclosure are:
- chemical industry equipment enclosure
- outdoor meter box enclosure/junction box enclosure
- Water treatment system valve box enclosure
- Communication base station outdoor enclosure
- Construction line pipe trough box enclosure
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Plastic Enclosures from Supro
If you’re not sure how you should customize your plastic electronic enclosures, contact us today! The Supro team can help! Established in 2004, we are a plastic electrical enclosure manufacturer. With rich manufacturing experience, a strong technical team and comprehensive manufacturing resources, we have provided one-stop plastic electrical enclosures manufacturing solutions to more than 3,000 companies worldwide.
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