Differences Between PC (Polycarbonate) and PET (Polyethylene Terephthalate) Films

1. Material Properties:

   • Strength & Impact Resistance: PC films are significantly stronger and more impact-resistant, making them ideal for applications like bullet-resistant barriers or protective covers. PET films, while durable, are less impact-resistant but offer good tensile strength.

   • Heat Resistance: PC has a higher glass transition temperature (~147°C) compared to PET (~70°C), making PC suitable for high-temperature environments (e.g., automotive components). PET may deform under prolonged heat exposure.

   • Chemical Resistance: PET resists moisture and chemicals (e.g., acids, alcohols) better, ideal for food/beverage packaging. PC is prone to degradation by oils, solvents, and alkaline cleaners, leading to cloudiness or cracking.

2. Optical Clarity:

   • PC films offer superior optical clarity and light transmission, often used in lenses or displays. PET films are clear but may have slight haziness compared to PC.

3. Environmental & Health Factors:

   • Recyclability: PET is widely recycled (#1 code) and eco-friendly. PC is less commonly recycled and may release toxic fumes (e.g., BPA) when incinerated.

   • BPA Content: Traditional PC contains BPA, raising health concerns for food contact. PET is BPA-free and FDA-approved for food packaging.

4. Applications:

   • PC Films: Used in high-performance applications—electronics (touchscreens), medical devices, automotive glazing, and aerospace due to toughness and heat resistance.

   • PET Films: Common in packaging (food wrappers, bottles), labels, flexible electronics, and solar panels due to cost-effectiveness and chemical stability.

5. Cost:

   • PET films are generally cheaper and more economical for mass-produced items. PC films are costlier but justified in specialized uses requiring durability.

Summary:
PC films excel in strength, heat resistance, and optical clarity but face environmental and cost drawbacks. PET films prioritize chemical resistance, recyclability, and affordability, making them dominant in packaging and everyday applications. The choice depends on the specific requirements of the application.

If you have any further questions about PET release film, please feel free to inquire.Huamei is a manufacturer of release films with over ten years of experience, and has a professional team to solve problems.