There are many standard sizes under the plastic packaging, such as 8, 12, 16, 24, 32, 44 and 56mm, which are the standard specifications of ELA and are more accepted by the industry. In addition, 72, 88, 104 and 120mm packaging tapes are also used for connectors or large components. However, similar packaging methods with such large sizes must be made of materials–carrier tape plastic packaging
The material supplier, component manufacturer and user shall coordinate together.
At present, the plastic materials commonly used in the embedded carrier tape include the following: polyolefins [HDPE, PP], polyrenes [PS, imps, ABS], polyyny1 chlorides
【PVC】、polyesters【PET,APET,PETG】、polycarbonates【PC】。—carrier tape plastic packaging

The above materials have different physical properties due to different materials, including stiffness, impact resistance, strength, light transmittance and dimensional stability. The packing belt made of any material must have its own advantages and disadvantages. Therefore, before deciding which lower belt material to use, we must first understand its characteristics and give appropriate packaging in order to operate smoothly in the pick & place machine.—carrier tape plastic packaging
For the selection of electrical characteristics (note), usually transparent insulation or transparent anti-static packaging, the lower belt is generally used for the packaging materials of passive components, such as multilayer ceramic capacitors, tantalum capacitors, resistors, inductors and parts such as connectors and oscillators.—carrier tape plastic packaging

The lower band of black conductive grade packaging is used for transistors, diodes, ICs and any non-conductive parts sensitive to static electricity. As for the criteria for selecting packaging materials, there is no final conclusion at present. It generally depends on the user. Sometimes, for the requirements of the whole production line, some passive components or connectors will also be required to use conductive or static dissipating packaging materials to avoid damage to other components caused by static electricity. In the production of electrical characteristics, most of them achieve the effect of anti-static or conductive by surface coating. For some lower belts with high quality requirements, the carbon powder conductive material is mixed in the plastic material, and the lower belt is made by the consistent forming method or the forming method after pressing the sheet, which can ensure the consistency of electrical characteristics.