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Introduction

Antistatic polystyrene packaging sheets are widely used in electronic product packaging due to their good rigidity, good processability and good dimensional stability of the finished product.

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Physical and Chemical Properties

Technical data	Test standard	Test value
Density	ASTM D-792	1.07G/cm3
Yield tensile strength	ASTM D-638	25Mpa
Breaking Tensile Strain	ASTM D-638	48％
Impact strength	ASTM D-256	16KJ/m2
Heat distortion temperature (cooling after heating)	ASTM D-648	81°C
Vicat softening temperature	ASTM D-1525	88°C
Surface resistance at 8%RH	ASTM D-257	109-11Ohm per square

Antistatic Processing Method

Electronic products have high requirements for the antistatic performance of packaging materials, and static electricity is likely to be generated during the transportation of electronic products. If static electricity is not led away, it will cause great harm to electronic products. The antistatic polystyrene sheet can be obtained by applying an antistatic agent on the outside and adding an antistatic agent on the inside. The method of coating with antistatic agent is simple and has good antistatic effect and low material cost. However, the surface coated with antistatic agent is easy to fall off during transportation and use, causing the material to lose antistatic performance, and there are many such antistatic agents. It is an ionic surfactant, and its antistatic property is greatly affected by the environment, especially humidity and temperature. The antistatic agent added by the internally added antistatic agent includes two kinds of ordinary antistatic agent and polymer permanent antistatic agent. Compared with the externally coated antistatic method, the antistatic effect of the sheet obtained by the internally added antistatic agent method is long-lasting Better performance and less environmental sensitivity, but the material cost is relatively high, and the molding process requirements are relatively high.

ESD (electrostatic discharge) materials

Material	Surface resistance (Ω/sq)	Characteristic
Conductive	103 to 105	Conductive materials have low resistance, so electrons can easily flow through the surface or inside of these materials. The charge will flow to the ground or another conductive object in contact with the material.
Static dissipation	105 to 109	Compared with conductive materials, static dissipative materials can make charge flow to the ground or other conductors in a more controlled and slow manner.
Anti-static	109 to 1012	Anti-static materials can inhibit friction and electricity generation.