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injection molding PET raw materials molding process key points
injection molding PET raw materials molding process key points
PET polyethylene terephthalate (PET) | technology 文章 | Daoqin plastics raw materials
本文 will detailed introductionpolyethylene terephthalate (PET) （PET）material property can features, application areas and processing process, is material selection and product design provide 参考.
detailed introduction
PET raw materials injection molding process is plastics processing in non important technology process 之一, for/regarding PET plastics bottle 而言, large more 数情况 lower plastics packaging 厂都会 using/adopting blow molding methods made as processing, injection molding process especially has processing advantages, for/regarding PET injection molding 说, technology need very more factors, lower.
PET raw materials brief introduction: PET化 Scientific Names is terephthalic acid alcohol ester, also polyester. currently in in use more is GF-PET, main/primary is bottle 胚.
PET raw materials in melt lower property relatively good, pressure for viscosity effect/influence ratio temperature degree need large, therefore, main/primary from pressure 手 改变 melt flow property.
PET raw materials chemical and material features:PET raw materials 玻璃化转化 temperature degree in 165℃ left right, material crystallization temperature degree scope/range is 120~220℃. PET in high temperature lower has very strong/high wet property. for/regarding glass fiber reinforcement type PET材 material 说, in high temperature lower also non easy bending 形变.
can through add crystallization reinforcement agent improve/increase material crystallization degree. use PET processing transparent products tool has gloss degree and hot temperature degree. can toward PET in add and other additives make bending deformation decrease small to small 至. if use relatively low mold temperature degree, that use non filling PET raw materials can obtain transparent products.
injection molding process: injection molding method main/primary used for reinforcement PET molding. usually using/adopting screw injection machine. screw generally 均需进行 hard 化处理, in long use rear abrasion consumption. injection machine nozzle long degree can can short, its 直径应 control in 3mm left right.
[材 material basic parameters ]
| density | 1.33~1.38 g/cm³ |
| melting point | 250~265°C |
| heat deflection temperature (HDT) | 70~85°C（ crystallization rear 230°C） |
| tensile strength | 55~75 MPa |
| flexural modulus | 2800~3100 MPa |
| molding shrinkage | 1.2~2.0% |
| water absorption | 0.1~0.2% |
| retardant property | for CO₂ and O₂ retardant property excellent |
core advantages
- excellent force property can: strong/high degree high, rigid property good, resistant fatigue
- excellent retardant property: for gas and water gas retardant property in general purpose plastics in most good
- good chemical resistance: resistant large more solvent agent and chemical product
- high transparency degree （ non crystallization 态）: combined packaging and container application
- can recycling property: is most recycling plastics 之一
- resistant temperature property good: reinforcement PET heat deflection temperature (HDT) can 达230°C
application areas
material bottle, food packaging, film, sheet/slice
涤纶 fiber, 无纺布, industrial filament
connectors, 开关, insulation film
发动 machine cover/cap, device 臂, electrical parts
gears, bearings, 泵体, 阀门
injection molding processing process
- drying 处理: 130~150°C drying 4-6 small 时, moisture content ≤0.02%
- material temperature degree: 260~290°C
- mold temperature degree: 20~80°C（ low mold temperature is non crystallization 态, high mold temperature is crystallization 态）
- injection pressure: 70~120 MPa
- injection speed degree: in speed
- precautions: PET for hydrolysis is 敏感, processing front must separation drying
above inner 容由Daoqin plastics raw materials has companytechnology 部整理 editor | 如需 understanding more more PET polyethylene terephthalate (PET) material 信息, electrical inquiry
联系 electrical 话: 19279864570（ micro 信同号）
