Properties of Recycled Polyester
9
6.4 Factors Influencing the Polyester Reprocessing
Polyester recycling depends on some of the physical and chemical features such as.
6.5 Colorants
The water bottles and other colored polymer compounds release colors and pigments
during the recycling process. The effective segregation and purification recycling
procedure lower the colored compounds.
6.6 Contaminants
The contaminants present in the polyester flakes are one of the important parameters
depending on which the polyester is recycled. The type and intensity of the contaminant in the polyester have a strong impact on the physical and chemical properties
of the recycled polyesters. Some of the contaminants release toxic acids during the
reprocessing steps which remain as a major hindrance in the polyester recycling.
The acetaldehyde is one of the toxic compound released during the PET recycling,
in addition, the acetaldehyde enters the food chain easily and affects the environment.
The adhesives and poly vinyl chloride are some of the contaminants present in the
polyesters [15].
6.7 Water
The presence of water in the polyester during the recycling process reduces the
weighted average of the material. The moisture content should be always below
0.02% in the polyester material to be recycled. The presence of a higher amount of
water is due to the overflow during the washing process and improper drying process
[12].
7 Properties of Recycled Polyesters
The polyesters are generally developed to be hard, soft, frail, flexible and strong
materials. The thermoplastic polyesters are identical with the properties of nylon 6
and nylon 66. The exception is its high dimensional stability and less water absorption
capacity. When these polyesters are coated with glass fibers, several features such
9
6.4 Factors Influencing the Polyester Reprocessing
Polyester recycling depends on some of the physical and chemical features such as.
6.5 Colorants
The water bottles and other colored polymer compounds release colors and pigments
during the recycling process. The effective segregation and purification recycling
procedure lower the colored compounds.
6.6 Contaminants
The contaminants present in the polyester flakes are one of the important parameters
depending on which the polyester is recycled. The type and intensity of the contaminant in the polyester have a strong impact on the physical and chemical properties
of the recycled polyesters. Some of the contaminants release toxic acids during the
reprocessing steps which remain as a major hindrance in the polyester recycling.
The acetaldehyde is one of the toxic compound released during the PET recycling,
in addition, the acetaldehyde enters the food chain easily and affects the environment.
The adhesives and poly vinyl chloride are some of the contaminants present in the
polyesters [15].
6.7 Water
The presence of water in the polyester during the recycling process reduces the
weighted average of the material. The moisture content should be always below
0.02% in the polyester material to be recycled. The presence of a higher amount of
water is due to the overflow during the washing process and improper drying process
[12].
7 Properties of Recycled Polyesters
The polyesters are generally developed to be hard, soft, frail, flexible and strong
materials. The thermoplastic polyesters are identical with the properties of nylon 6
and nylon 66. The exception is its high dimensional stability and less water absorption
capacity. When these polyesters are coated with glass fibers, several features such