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Size and application of waterproof junction boxes

Mar. 24, 2021

Waterproof junction boxes exist in all areas of life. Maybe you haven't discovered its subtle uses and hidden places. This is because there are various styles of waterproof junction boxes and their application fields are also very wide. Which size junction box is more suitable for you to choose in real life? If used improperly, it will be very troublesome. In order to avoid these things from happening, let us understand the related application of waterproof junction box.

Size and application of waterproof junction boxes


Polycarbonate (PC) material: Polycarbonate (PC for short) is a high molecular weight polymer that contains carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Among them, the lower mechanical properties of aliphatic and aliphatic-aromatic polycarbonates limit their application in engineering plastics. At present, only aromatic polycarbonate has been industrially produced. Due to the special structure of polycarbonate, it has become the fastest growing general engineering plastic among the five major engineering plastics.

PC / ABS materials: polycarbonate and acrylonitrile-butadiene-styrene copolymers and mixtures, are thermoplastics made of polycarbonate and ABS alloy, combining the excellent properties of the two materials, the ABS material can be Moldability and PC mechanical properties, impact strength, temperature resistance, UV resistance, etc., can be widely used in automotive interior parts, office equipment, communication equipment, household appliances and lighting equipment.

Glass fiber reinforced polyester material: GRP: Glass fiber reinforced plastic, also known as FRP. It is a composite material composed of two parts: a matrix and a reinforcing material. The matrix of GRP material is resin, which has an adhesive effect. Resin is a thermosetting plastic. The glass fiber reinforced material is glass fiber, which plays a role of reinforcement. GRP has good electrical insulation and bonding properties, high mechanical strength and heat resistance, spinnability, resistance to general acids, alkalis and organic solvents, and resistance to molds.

1. Material selection: The main application areas of current waterproof junction box products are industries and open spaces with harsh environments. When considering the safety performance of the product, the impact resistance, static load strength, insulation performance, non-toxic, aging resistance and non-toxic performance should be considered, mainly because the waterproof junction box product will not release toxic or harmful when it burns in the case of fire. gas. Generally, the death of a large amount of toxic gas is usually caused by the inhalation of a large amount of toxic gas during a fire.

2. Structural design: The overall strength of the waterproof junction box should be considered, beautiful, easy to process, easy to install and recyclable. At present, the waterproof junction box products produced by mainstream manufacturers do not contain metal accessories, which can simplify the product recycling process.

3. Wall thickness: Generally, when designing a product, the overall cost of the product should be considered to reduce the wall thickness of the product as much as possible while meeting the impact resistance and wax resistance of the product. The wall thickness of waterproof junction box, ABS and PC raw material products is usually between 2.5 and 3.5, glass fiber reinforced polyester is usually between 5 and 6.5, and the wall thickness of die-cast aluminum products is usually between 2.5 and 6. The wall thickness of the material should be designed to meet the installation requirements of most components and accessories.

4. Selection of sealing rubber ring material: For waterproof junction box products, the commonly used sealing rubber ring materials are: PUR, EPDM, nitrile rubber, and silicon. When selecting a sealing rubber ring, the temperature range, tensile strength, expansion ratio, hardness, density, compression ratio and chemical resistance should be considered.

We want to know whether the above related knowledge can inspire you? You need to keep in mind the size and application knowledge of the waterproof junction box. This will provide you with a guiding guide when choosing materials and avoid detours. Judge and select materials on the market more effectively. The knowledge involved in the waterproof junction box is more comprehensive, including related knowledge such as chemistry and physics. The more you know about waterproof junction boxes, the broader your knowledge will be.

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Size and application of waterproof junction boxes