Opp is polypropylene, O should mainly refer to the production process!
Opp: oriented, extensional polypropylene, a kind of polypropylene
And bidirectional polypropylene (BOPP)
Opp main products:
Opp tape: Based on polypropylene film, it has the advantages of high tensile strength, light weight, non-toxic and tasteless, environmental protection and wide application range
Opp bottle: light weight, low cost, improved transparency, good heat resistance, suitable for hot filling. In recent years, the transparent bottle of bidirectional polypropylene (OPP) has become the substitute of PET bottle
PP is polypropylene. It can be used as general structural parts, corrosion-resistant chemical equipment parts, heating electrical insulation parts.
The identification of waste plastics mainly includes: plasticizing temperature identification, combustion identification, density identification
Plasticizing temperature identification: ldpe110 ~ 115; hdpe140 ~ 145; lldpe125 ~ 130: pp165 ~ 170
PS145~150;PVC150~170;
Combustion identification method:
Product name flame characteristic burning degree appearance state smell
The upper part of PE is yellow, and the lower part is blue; the combustion is uninterrupted; it is smokeless, melting and dripping; such as the smell of paraffin burning
The flame color of PP is the same as that of PE; the same as that of black smoke, melting and dripping; such as petroleum smell
PS orange flame; the same as thick black smoke, soften and foam; such as styrene flavor
The upper part of PVC is yellow, and the bottom is green. It can extinguish white smoke when it leaves the fire. If it is soft, it can be spun; if it has hydrogen chloride smell, it is pungent
Pet can be broken into fragments continuously when burning yellow inside and blue outside
Appearance characteristics:
PE feels greasy and translucent when it is not dyed, it is soft and tough. LLDPE is softer and HDPE is slightly harder
PP is harder than PE and has better transparency. It is white and translucent when it is not colored
The natural color of PVC is yellowish and transparent, and its transparency is better than that of PE and PP. Soft products are soft and tough. The hardness of hard products is higher than that of LDPE
But lower than PP
PET bottle material pet is divided into: bottle mouth crystallization for high temperature material, bottle mouth and bottle body with the same color for low temperature material.
