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What is the raw material for PET film?

What is the raw material for PET film?

2023-03-10

The primary raw materials used in the production of PET (polyethylene terephthalate) film are:

Terephthalic Acid (PTA) or Dimethyl Terephthalate :
- These serve as the aromatic dicarboxylic acid component. Pure terephthalic acid (PTA) is commonly used in modern production, while dimethyl terephthalate was historically preferred in some processes due to easier handling.
Ethylene Glycol (EG):
- This diol provides the glycol component. It reacts with the acid (PTA ) via polycondensation to form PET polymer chains, releasing water (for PTA) or methanol as byproducts.

Process Overview:

PTA and EG ( and EG) are polymerized into PET resin.
The resin is melted and extruded into thin sheets, which are stretched biaxially to create strong, transparent PET film.

Optional Additives:

UV stabilizers, colorants, anti-static agents, or slip agents may be added to enhance specific properties like durability, clarity, or processing efficiency.

Recycled PET:

Recycled PET (from bottles, etc.) can sometimes be incorporated as a secondary feedstock, but the fundamental raw materials remain PTA and EG.

Thus, the core raw materials are terephthalic acid and ethylene glycol, forming the PET polymer backbone.

Blog Details

Home Blog

What is the raw material for PET film?

What is the raw material for PET film?

2023-03-10

The primary raw materials used in the production of PET (polyethylene terephthalate) film are:

Terephthalic Acid (PTA) or Dimethyl Terephthalate :
- These serve as the aromatic dicarboxylic acid component. Pure terephthalic acid (PTA) is commonly used in modern production, while dimethyl terephthalate was historically preferred in some processes due to easier handling.
Ethylene Glycol (EG):
- This diol provides the glycol component. It reacts with the acid (PTA ) via polycondensation to form PET polymer chains, releasing water (for PTA) or methanol as byproducts.

Process Overview:

PTA and EG ( and EG) are polymerized into PET resin.
The resin is melted and extruded into thin sheets, which are stretched biaxially to create strong, transparent PET film.

Optional Additives:

UV stabilizers, colorants, anti-static agents, or slip agents may be added to enhance specific properties like durability, clarity, or processing efficiency.

Recycled PET:

Recycled PET (from bottles, etc.) can sometimes be incorporated as a secondary feedstock, but the fundamental raw materials remain PTA and EG.

Thus, the core raw materials are terephthalic acid and ethylene glycol, forming the PET polymer backbone.