How To Choose Antistatic Grade ABS Plastic Material?

November 18, 2024

ABS is a good electrical insulator and is virtually unaffected by temperature, humidity and frequency, allowing it to be used in most environments. But do you know why vacuum cleaner dust cups need to be made of anti-static ABS? One of the important duties of a vacuum cleaner dust cup is to collect and store dust and dirt. However, static charging inside the dust cup may cause dust to stick to the walls of the cup, making it difficult to clean. In order to eliminate the static charge inside the cup and prevent the dust from sticking to the inside of the cup and not coming off easily, anti-static ABS materials are needed.

As an example, the current trend of electronic products towards small size, light weight, strong function, so the composition of electronic devices often belong to the tiny level, with low power consumption, low voltage and other characteristics, but this electronic component allows the passage of the current is small, very sensitive to static electricity, and by the static damage is not easy to detect, easy to cause greater losses. In the transfer process of electronic components, often because of the friction generated by static electricity, so manufacturers need to use anti-static ABS materials produced by the tray transit electronic components.

antistatic ABS material selection of high-quality ABS resin as the base material, through the addition of antistatic agents and other special additives for modification and processing, to regulate the material properties, to ensure that it has good antistatic properties, to avoid the impact of static charges on the surface of the product.

SAN resistance properties should AN polar nature and slightly lower than PS, but still have sufficient insulation.ABS surface static charge in the processing, transportation, use triggered by adsorption of dust, demolding difficulties, electrostatic discharge and other issues. Therefore, ABS products need to have a certain degree of conductivity to prevent internal discharge, and can even shield the outside world on the electromagnetic interference of precision electronic components. Adding antistatic agent can prevent static charge generation or dissipation of static charge, is the main method of preparing antistatic grade ABS.

Antistatic agents can be added before or during the processing of ABS.

Depending on the method of addition, the types of antistatic agents are as follows:

(1) external antistatic agent, in the form of water or alcohol solution coated on the surface of ABS products, the most frequently used is quaternary ammonium salt. The quaternary ammonium salt reduces the surface resistance of the product, but it is easily removed during use and cleaning of the product, and is therefore widely used for short-term purposes such as preventing the accumulation of dust on display parts.

(2) Internal antistatic agent, added during the processing of ABS, add a small amount (0.1% ~ 3%), and ABS to a certain degree of compatibility. Within the antistatic agent is divided into migratory antistatic agent and permanent antistatic agent, migratory antistatic agent for ionic or non-ionic surfactants, hydrophobic part of the limited compatibility with the ABS, hydrophilic part of the internal migration to the surface of the ABS can be adsorbed to increase the conductivity of the surface water. After the removal of the surface of the antistatic agent, the internal antistatic agent can still continue to migrate to the surface, until all depleted, and thus the use of the time longer than the external static agent. Permanent antistatic agents do not migrate, including fillers with high electrical conductivity (e.g., carbon black, metal-coated carbon fibers, stainless steel wire), hydrophilic polymeric materials (e.g., Polyethylene oxide copolymers), and electrically conductive polymeric materials (e.g., Polypropylene acrylic acid, polythiophene). Among them, hydrophilic polymer materials are low and are mainly used in office automation equipment. Conductive fillers are not suitable for applications where color and transparency are indicated, and in the electronics field.

Typical properties of antistatic grade ABS

Under the same formulation conditions, the production conditions such as mixing equipment and mixing process and injection molding process have a great influence on the performance of the final product, such as mixing temperature, residence time, screw speed, extrusion output, injection molding temperature, die temperature, etc. will directly affect the performance of the final product.

Anti-static ABS is a kind of ABS material with anti-static properties. This material prevents the buildup of electrostatic charges and thus protects electronic components from electrostatic damage. It has the following advantages:

- Anti-static: the surface resistivity can reach 10 to the 10th power, which can effectively prevent the accumulation of static charge and has good electrical insulation.

- Good impact resistance: the material has good impact resistance, high rigidity, good dimensional stability and stable chemical properties.

- Unaffected by water and inorganic salt: good chemical resistance, unaffected by water and inorganic salt.

- Aging resistance: good aging resistance, long service life.

- Excellent comprehensive performance: excellent comprehensive physical and mechanical properties, impact resistance, dimensional stability, easy fluidity, low water absorption, chemical resistance, better molding processing and machining, water resistance.

How to choose anti-static ABS material? The following aspects can be considered:

- Surface resistivity: the surface resistivity of anti-static ABS material is generally around 10 to the 10th power, which can effectively prevent the accumulation of static charge and has good electrical insulation.

- Impact resistance: anti-static ABS material has good impact resistance, high strength and good dimensional stability.

- Aging resistance: good aging resistance, long service life.

- Electrical insulation: good electrical insulation performance, protect electronic components.

- Dimensional stability: good dimensional stability, not affected by water, inorganic salts, chemical resistance.

When choosing anti-static ABS materials, it is recommended to choose regular manufacturers and suppliers to ensure the quality and stability of the materials.

Author:

Ms. Tina

E-mail:

sales@honyplastic.com

Phone/WhatsApp:

+86 18680371609