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PET Dehumidifying dryer parameter
PET material, the full name polyethylene terephthalate, is usually called polyester resin, which is the most important variety in thermoplastic polyester. Abbreviated as PET or PEIT
PET is mainly used for fibers, and a small amount is used for films and engineering plastics. PET fiber is mainly used in the textile industry. PET film is mainly used for electrical insulation materials, such as capacitors, cable insulation, printed circuit wiring substrates and electrode tank insulation. Another application field of PET film is film base tape and base tape, such as motion picture film, X-ray film, audio tape, computer tape and so on. PET film also uses vacuum aluminum to make metallized films, such as gold and silver wires, and miniature capacitor films. Another use of PET is blow molding products, polyester stretch bottles for packaging. Glass fiber reinforced PET is suitable for electrical, electronic and automotive industries. It is used in various coil formers, transformers, TVs, tape recorder parts and casings, car lamp holders, lamp shades, incandescent lamp holders, relays and rectifiers. It is odorless and aroma-preserving, safe in food hygiene, beautiful and easy to shape, and has been widely used in food containers.
PET is a crystalline resin with a specific gravity of about 1.4kg/L, a melting point of 245°C, and a molding temperature of about 290-315°C. The particle bulk density is 0.8~0.85kg/L, and the sheet bulk density is 0.38~0.4kg/L.
The main uses of PET are in the fields of synthetic fibers, PET bottles and film sheets. In recent years, with the economic development, people’s awareness of environmental protection has increased. As a packaging material, PET sheets are replacing PVC packaging materials that are difficult to recycle. The aspect shows good development potential.
Drying temperature
Because PET is highly hygroscopic, drying before processing is necessary. The recommended drying condition is 120~165℃, 4~6 hours drying treatment. If it is a sheet extrusion line, the moisture content after drying should be less than 200ppm; if it is a preform production line, it should be less than 50 ppm after drying; conventional spinning is less than 50ppm, and high-speed spinning is less than 35ppm.
temperature
Generally, the higher the drying temperature, the higher the drying rate; the shorter the drying time, the lower the moisture content of the raw material after drying. The drying temperature of the stirred crystallizer is usually between 120~160℃. Dehumidification drying temperature is between 160~180℃.
time
The crystallization time is 1 to 2 hours, and the crystallization time is inversely proportional to the pre-crystallization temperature.
The drying time is 4~6 hours to make the water content of PET approach or reach the equilibrium water content; the drying time is related to the drying temperature, vacuum degree, and moisture content of dry air.
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PET Dehumidifying dryer Equipment principle
PET material, the full name polyethylene terephthalate, is usually called polyester resin, which is the most important variety in thermoplastic polyester. Abbreviated as PET or PEIT
PET is mainly used for fibers, and a small amount is used for films and engineering plastics. PET fiber is mainly used in the textile industry. PET film is mainly used for electrical insulation materials, such as capacitors, cable insulation, printed circuit wiring substrates and electrode tank insulation. Another application field of PET film is film base tape and base tape, such as motion picture film, X-ray film, audio tape, computer tape and so on. PET film also uses vacuum aluminum to make metallized films, such as gold and silver wires, and miniature capacitor films. Another use of PET is blow molding products, polyester stretch bottles for packaging. Glass fiber reinforced PET is suitable for electrical, electronic and automotive industries. It is used in various coil formers, transformers, TVs, tape recorder parts and casings, car lamp holders, lamp shades, incandescent lamp holders, relays and rectifiers. It is odorless and aroma-preserving, safe in food hygiene, beautiful and easy to shape, and has been widely used in food containers.
PET is a crystalline resin with a specific gravity of about 1.4kg/L, a melting point of 245°C, and a molding temperature of about 290-315°C. The particle bulk density is 0.8~0.85kg/L, and the sheet bulk density is 0.38~0.4kg/L.
The main uses of PET are in the fields of synthetic fibers, PET bottles and film sheets. In recent years, with the economic development, people’s awareness of environmental protection has increased. As a packaging material, PET sheets are replacing PVC packaging materials that are difficult to recycle. The aspect shows good development potential.
Drying temperature
Because PET is highly hygroscopic, drying before processing is necessary. The recommended drying condition is 120~165℃, 4~6 hours drying treatment. If it is a sheet extrusion line, the moisture content after drying should be less than 200ppm; if it is a preform production line, it should be less than 50 ppm after drying; conventional spinning is less than 50ppm, and high-speed spinning is less than 35ppm.
temperature
Generally, the higher the drying temperature, the higher the drying rate; the shorter the drying time, the lower the moisture content of the raw material after drying. The drying temperature of the stirred crystallizer is usually between 120~160℃. Dehumidification drying temperature is between 160~180℃.
time
The crystallization time is 1 to 2 hours, and the crystallization time is inversely proportional to the pre-crystallization temperature.
The drying time is 4~6 hours to make the water content of PET approach or reach the equilibrium water content; the drying time is related to the drying temperature, vacuum degree, and moisture content of dry air. can dry to a moisture content below 0.02%, and solves the shortcomings of poor transparency, sprue sticking, bubbles, silver bars, cracks, poor dimensional stability, internal stress, and insufficient product physical strength.
Dehumidification and drying feeding equipment series are composed of: non-heat dehumidification dryer, heat preservation type drying barrel and all stainless steel suction machine. The suction machine can transport the raw materials from the drying barrel to the forming machine, and can also transport the raw materials from the storage barrel to the drying barrel. According to customer needs, a kind of raw material can be delivered to two molding machines, vacuum motors and safety filter dust collectors are installed inside the machine. According to the production needs of different products, we can provide a powder-removing suction machine to separate the powder in the raw material and capture it. This device has a compact structure and is suitable for the production of precision injection products using engineering plastics such as connectors, precision gears, mobile phone communications, digital cameras and product size requirements, so that the moisture content of the raw materials after wet and dry is low and stable, which can meet strict requirements Technical and quality requirements.
Most engineering plastics are hygroscopic. When the plastic is taken out from the moisture-proof sealed packaging bag and exposed to the atmosphere, it will begin to absorb moisture from the atmosphere.
If it is a conventional hot-air barrel dryer, it is Humid external air can dry the plastic, so it cannot prevent the plastic from continuing to absorb moisture.
1. The internal circulation of the dehumidifier: through the operation of the compressor → discharge high-temperature and high-pressure gas through the exhaust port → enter the condenser for cooling → become a low-temperature and high-pressure gas → pass through the capillary tube → become a low-temperature and low-pressure liquid → evaporate and suck through the evaporator Heat → until the compressor becomes a low-temperature and low-pressure gas. So it goes back and forth.
2. The external circulation of the dehumidifier: under normal startup → through the operation of the fan → moist air is sucked in from the air inlet → passes through the evaporator → the evaporator absorbs the moisture in the air on the aluminum sheet → becomes dry air → Pass through the condenser to dissipate heat → blow out from the air outlet.
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PET Dehumidifying dryer application
PET material, the full name polyethylene terephthalate, is usually called polyester resin, which is the most important variety in thermoplastic polyester. Abbreviated as PET or PEIT
PET is mainly used for fibers, and a small amount is used for films and engineering plastics. PET fiber is mainly used in the textile industry. PET film is mainly used for electrical insulation materials, such as capacitors, cable insulation, printed circuit wiring substrates and electrode tank insulation. Another application field of PET film is film base tape and base tape, such as motion picture film, X-ray film, audio tape, computer tape and so on. PET film also uses vacuum aluminum to make metallized films, such as gold and silver wires, and miniature capacitor films. Another use of PET is blow molding products, polyester stretch bottles for packaging. Glass fiber reinforced PET is suitable for electrical, electronic and automotive industries. It is used in various coil formers, transformers, TVs, tape recorder parts and casings, car lamp holders, lamp shades, incandescent lamp holders, relays and rectifiers. It is odorless and aroma-preserving, safe in food hygiene, beautiful and easy to shape, and has been widely used in food containers.
PET is a crystalline resin with a specific gravity of about 1.4kg/L, a melting point of 245°C, and a molding temperature of about 290-315°C. The particle bulk density is 0.8~0.85kg/L, and the sheet bulk density is 0.38~0.4kg/L.
The main uses of PET are in the fields of synthetic fibers, PET bottles and film sheets. In recent years, with the economic development, people’s awareness of environmental protection has increased. As a packaging material, PET sheets are replacing PVC packaging materials that are difficult to recycle. The aspect shows good development potential.
Drying temperature
Because PET is highly hygroscopic, drying before processing is necessary. The recommended drying condition is 120~165℃, 4~6 hours drying treatment. If it is a sheet extrusion line, the moisture content after drying should be less than 200ppm; if it is a preform production line, it should be less than 50 ppm after drying; conventional spinning is less than 50ppm, and high-speed spinning is less than 35ppm.
temperature
Generally, the higher the drying temperature, the higher the drying rate; the shorter the drying time, the lower the moisture content of the raw material after drying. The drying temperature of the stirred crystallizer is usually between 120~160℃. Dehumidification drying temperature is between 160~180℃.
time
The crystallization time is 1 to 2 hours, and the crystallization time is inversely proportional to the pre-crystallization temperature.
The drying time is 4~6 hours to make the water content of PET approach or reach the equilibrium water content; the drying time is related to the drying temperature, vacuum degree, and moisture content of dry air. With the widespread use of engineering plastics, Dehumidifying dryers have gradually replaced traditional hot air dryers.
This is a device used to dehumidifying plastic resin to achieve drying. For example,
POM,ABS,TPE,PAL,ABS,CAB,EVA(2),EVOH,LM(4),LCP,PA11,PA6.46.6,PAI,PAR,PBT,
PC,PC/ABS,PC/PBT,PE.HDEPE,LDPE black3%,PE.HDEPE.LDPE black40%,PEEK,PE(1),
PEN,PES,PET,PETG,PI,PMMA,POM,PP,PPO,PPS,PS,[GPPS.EPS.HIPS],PSU,PIT,PUR,
PVC,SAN,SB,TPE,TPE,TPO,TPU,
Dehumidifier dryerand other plastic resins must be dehumidified and dried during the production process to improve the quality of the finished product.
PET Dehumidifying dryer series are mainly designed for high-efficiency dehumidification of engineering plastics with strong hygroscopicity. Using the honeycomb runner with ceramic fiber as the base material, which represents the highest technological achievements of today, as the core component, the dry air provided can easily reach -40℃ dew point, and ideally it can reach -50℃ or even lower dew point , And the dew point temperature is stable, ensuring the high quality and stability of the molded plastic products. The whole series adopts P.LD. temperature control system as standard equipment; also provides PLC control with LCD touch-sensitive human-machine interface and can monitor the dehumidification effect of the machine Dew point meter is optional, the maximum drying air volume of this product can reach 3000m3/hr. The plastic before molding must be dried to an orientation ratio of less than 0.02%, which is completely bad, sprue adhesion, burrs, bubbles, silver bars, flow marks, cracks, dimensional stability and internal stress. Product defects (for example, insufficient physical properties and strength) are caused by sufficient dehumidification of the plastic before molding. Especially for PET, PBT, PA, PC and other high water absorption plastics, drying equipment with an ultra-low dew point of -40°C is required.
PET Dehumidifying dryer can be dried to a volume ratio of less than 0.02%, which solves the shortcomings of short circuit, gate adhesion, bubbles, silver bars, cracks, poor dimensional stability, internal stress and insufficient physical strength of the product. There are a lot more.
Mainly used in plastic products, automobiles, optical discs, experiments, communications, optics, etc.; the rotary honeycomb can reach a low dew point of zero bai for dehumidification and drying at -40°C. In the case of enhanced configuration, the dehumidification dew point can be as high as -50°C. It is a choice for high-precision industries.
PET Dehumidifying dryer Precautions
PET material, the full name polyethylene terephthalate, is usually called polyester resin, which is the most important variety in thermoplastic polyester. Abbreviated as PET or PEIT
PET is mainly used for fibers, and a small amount is used for films and engineering plastics. PET fiber is mainly used in the textile industry. PET film is mainly used for electrical insulation materials, such as capacitors, cable insulation, printed circuit wiring substrates and electrode tank insulation. Another application field of PET film is film base tape and base tape, such as motion picture film, X-ray film, audio tape, computer tape and so on. PET film also uses vacuum aluminum to make metallized films, such as gold and silver wires, and miniature capacitor films. Another use of PET is blow molding products, polyester stretch bottles for packaging. Glass fiber reinforced PET is suitable for electrical, electronic and automotive industries. It is used in various coil formers, transformers, TVs, tape recorder parts and casings, car lamp holders, lamp shades, incandescent lamp holders, relays and rectifiers. It is odorless and aroma-preserving, safe in food hygiene, beautiful and easy to shape, and has been widely used in food containers.
PET is a crystalline resin with a specific gravity of about 1.4kg/L, a melting point of 245°C, and a molding temperature of about 290-315°C. The particle bulk density is 0.8~0.85kg/L, and the sheet bulk density is 0.38~0.4kg/L.
The main uses of PET are in the fields of synthetic fibers, PET bottles and film sheets. In recent years, with the economic development, people’s awareness of environmental protection has increased. As a packaging material, PET sheets are replacing PVC packaging materials that are difficult to recycle. The aspect shows good development potential.
Drying temperature
Because PET is highly hygroscopic, drying before processing is necessary. The recommended drying condition is 120~165℃, 4~6 hours drying treatment. If it is a sheet extrusion line, the moisture content after drying should be less than 200ppm; if it is a preform production line, it should be less than 50 ppm after drying; conventional spinning is less than 50ppm, and high-speed spinning is less than 35ppm.
temperature
Generally, the higher the drying temperature, the higher the drying rate; the shorter the drying time, the lower the moisture content of the raw material after drying. The drying temperature of the stirred crystallizer is usually between 120~160℃. Dehumidification drying temperature is between 160~180℃.
time
The crystallization time is 1 to 2 hours, and the crystallization time is inversely proportional to the pre-crystallization temperature.
The drying time is 4~6 hours to make the water content of PET approach or reach the equilibrium water content; the drying time is related to the drying temperature, vacuum degree, and moisture content of dry air.
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