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Materials of Optical Distribution Box

Fiber and communications infrastructure knowledge brief Published 27 Aug 2024

Prepared for preliminary research by the ALFA PRO knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Optical distribution boxes are commonly made from SMC, ABS, ABS+PC, PP, or cold-rolled steel, chosen for durability, environmental resistance, and mechanical protection. Common Materials and Their Properties1.

SM

C (Sheet Molding Compound) Composite SMC is a high-performance composite material composed of special yarn, unsaturated thermoforming resin, organic fiber reinforced plastic, fillers, and additives. It offers excellent moisture, dust, water, and corrosion resistance, along with strong anti-aging properties and a long service life of up to 50 years.

SM

C provides high mechanical strength and can achieve IP65 protection, making it ideal for harsh outdoor environments. Its main drawback is higher cost, which may limit its use in budget-sensitive projects. 2.

AB

S (Acrylonitrile Butadiene Styrene) ABS is a lightweight and cost-effective plastic suitable for indoor applications. It provides basic mechanical protection and is resistant to minor impacts. However, its weather resistance is limited, making it less suitable for prolonged outdoor exposure without additional protection.

3. ABS+PC (Acrylonitrile Butadiene Styrene + Polycarbonate) This blend improves impact resistance and limited weather tolerance compared to pure ABS. ABS+PC is commonly used for outdoor or industrial scenarios, offering a balance between durability, cost, and mechanical protection.

It is widely adopted in fiber distribution boxes for both indoor and outdoor installations. 4.

P

P (Polypropylene) PP is another plastic option used in some optical distribution boxes. It is lightweight, corrosion-resistant, and cost-effective, but generally offers lower mechanical strength and durability compared to SMC or ABS+PC. 5.

Cold-

Rolled Steel Cold-rolled steel provides high strength, flatness, and surface finish, making it suitable for boxes requiring structural rigidity and corrosion resistance. After coating or painting, it can be used in both indoor and outdoor environments, though it is heavier than plastic alternatives.

Material Selection Considerations

Environmental Resistance: Outdoor boxes require materials like SMC or ABS+PC to withstand UV, moisture, and temperature variations. Mechanical Protection: SMC and cold-rolled steel offer superior impact resistance for high-risk areas. Cost: ABS is the most economical, while SMC is premium.

ABS+PC provides a middle ground.

I

P Rating: Higher IP ratings (e.g., IP65) are achievable with SMC and ABS+PC, ensuring dustproof and waterproof performance. In summary, SMC is preferred for harsh outdoor conditions, ABS+PC for general outdoor/industrial use, ABS for indoor applications, and cold-rolled steel for high-strength requirements, while PP is used in cost-sensitive or less demanding environments.

Materials of Optical Distribution Box - ALFA PRO COMMUNICATION SYSTEMS (Pty) Ltd [PDF]

Materials of Optical Distribution Box

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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