Technology for eliminating static electricity of polyvinyl chloride powder

Abstract

The invention discloses technology for eliminating static electricity of polyvinyl chloride powder. Polyvinyl chloride powder dried by air flows from the upstream is subjected to first humidificationin an inlet pipe opening of a vibrating screen and then screened vibrationally and discharged to a secondary conveying pipeline. The polyvinyl chloride powder in the secondary conveying pipeline is subjected to secondary humidification and enters a packing material bin to perform packing operation. With the technology, the environment of the packing site is improved. A packing machine smoothly discharge and has good weighing effect. Pocketfuls are avoided. The weighting requirement is met.

Description

technical field

[0001] The invention relates to a conveying and packaging process of polyvinyl chloride (PVC), in particular to a process for eliminating static electricity of polyvinyl chloride powder. Background technique

[0002] Polyvinyl chloride (English: PolyVinyl Chloride, referred to as: PVC) is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. PVC is a white powder with an amorphous structure and a small degree of branching. The molecular weight of industrially produced PVC is generally in the range of 50,000 to 120,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature. There is no fixed melting point, it begins to soften at 80-85°C, becomes viscoelastic at 130°C, and becomes viscous fluid at 160-180°C. Its tensile strength is about 60MPa, and its impact strength is 5-10kJ / m 2 ; Excellent dielectric properties.

[0003] The existing method for industrialize...

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