Product Introduction > Recycling method
  • REVODE101
  • REVODE201
  • REVODE701
  • REVODE711

REVODE101 renewable materials can be reused (the renewable materials should be not longer than 3 months, and not more than 35% in complex).  Owing to the demand that the moisture content of sheet extrusion should be lower than 200 ppm, the renewable materials must be dealt with crystallization and high-temperature drying by desiccant device.
Crystallization method 1:
General crystallization equipment for PET is acceptable. For example, when 0.5 m3 crystallization autoclave is selected, the materials should be mixed homogeneously, with a 1:1 weight ratio of renewable materials to pure PLA. After being added into the crystallization autoclave, the warming crystallization of complex started under mixing at a speed of 3 rpm. The temperature is set at 60℃ for 20min, 80℃ for 10 min, 95℃ for 10min, at last at 110℃ for 30 min, and then lowing temperature step by step. The whole crystallization process lasts for about 1.5 hour.
Crystallization method 2:
By using the Kreyenborg infrared crystallization equipment, the materials are heated by infrared, accompanied by rotation mixing after being added into the infrared crystallization rolling barrel. The merit of this method is that the crystallization and drying process are carried out at the same time, and the process can be ended within 15~20 min.
Crystallization method 3:
After being pre-dried at low-temperature, the renewable materials will be extruded and palletized, after then, the crystallization process can be done in PET crystallization equipment.

Note: Bits and pieces can be reused for several times. During the reuse process of renewable materials, a small amount of assistant agent – ADR can be added to reduce the properties decline of renewable materials effectively, and the recommended amount is 0.1~0.6%.

REVODE201 renewable materials can be reused, but the renewable materials can only endure 58 ℃, since the absence of the re-crystallization treatment. The recovery materials can be processed by the following two methods, can be mixed with fresh resin at any ratios after re-drying.
Method1: Crush the regrind directly in the process, and mixed to use with fresh resin. The temperature of the hopper should not be higher than 55℃, or the hopper may be blocked. (recommended)
Method 2: Cumulate the regrind before crush and dry (within 3 months), and process together with fresh resin. Typical PLA drying conditions are shown in the table below:

Drying Parameter

Typical Settings

Residence Time(hours)

4-6

Air Temperature(℃)

55 (Temperature of Drying hopper)

Air Dew Point(℃)

-40 (Temperature of molecular sieve dehumidifier)

Air Flow Rate(m3/hr-kg resin)

>1.85

  

Method1: Crush the regrind directly in the process, and mixed to use with fresh resin. The temperature of the hopper should not be higher than 50℃, or the hopper may be blocked. (recommended)
Method 2: Cumulate the regrind before crush and dry, and process together with fresh resin. Typical PLA drying conditions are shown in the table below:


Drying Parameter

Typical Settings

Residence Time(hours)

4-6

Air Temperature(℃)

45(Temperature of normal oven)

Air Dew Point(℃)

-40 (Temperature of dehumidifier)

Air Flow Rate(m3/hr-kg resin)

>1.85

REVODE711 renewable materials can be reused. The recovery materials can be processed by the following two methods, and can be mixed with fresh resin at any ratios after re-drying.
Method1: Crush the regrind directly in the process, and mixed to use with fresh resin. The temperature of the hopper should not be higher than 80℃, or the hopper may be blocked. (recommended)
Method 2: Cumulate the regrind before crush and dry, and process together with fresh resin. Typical PLA drying conditions are shown in the table below:

Drying Parameter

Typical Settings

Residence Time(hours)

4-6

Air Temperature(℃)

75(Temperature of normal oven)

Air Dew Point(℃)

-40(Temperature of dehumidifier)

Air Flow Rate(m3/hr-kg resin)

>1.85