What is PE plastic film? What are its main raw materials?

In modern industrial packaging and agricultural applications, PE plastic film is undoubtedly one of the most widely used and influential materials. Whether it's food preservation film in supermarkets, stretch film in logistics transportation, or mulch film protecting crops, its presence is ubiquitous.

I. What is PE plastic film?

PE plastic film, short for polyethylene film, is a flexible, transparent, and chemically stable film material produced from polyethylene resin through blow molding or casting processes.

As a high-performance packaging material, it has the following significant characteristics:

• Excellent moisture resistance: Effectively isolates moisture, protecting the contents from drying out.
• Chemical stability: Resistant to most acids and alkalis at room temperature.
• High flexibility: Possesses good tensile strength and impact resistance.
• Hygiene and safety: Meets food-grade packaging standards; non-toxic and odorless.
  

II. Analysis of the main raw materials of PE plastic film

The performance of PE plastic film largely depends on the type of polyethylene resin used. Based on differences in molecular structure and density, the main raw materials are divided into the following three categories:

1. Low-density polyethylene (LDPE)

LDPE is the most traditional raw material for producing PE plastic film. It has more branched chains, resulting in a softer texture and higher transparency.

Applications: Commonly used in the manufacture of food preservation films, tubular bags, and lightweight packaging requiring high transparency.

2. Linear low-density polyethylene (LLDPE)

LLDPE has a narrower molecular weight distribution and a linear structure, giving the film excellent puncture resistance and tear resistance.

Industry advantages: In the production of industrial stretch wrap film, adding LLDPE can significantly improve the film's tensile strength, achieving thinner and stronger packaging.

3. High-density polyethylene (HDPE)

HDPE has a dense molecular arrangement and high crystallinity, resulting in high hardness and good heat resistance.

Main uses: Commonly used in supermarket shopping bags, vest bags, and industrial films requiring high barrier properties.

III. Why Choose High-Quality PE Film?

When choosing a PE plastic film manufacturer, the purity of the raw materials is paramount. High-quality manufacturers typically use 100% virgin materials to ensure the film is free of harmful impurities and has more stable physical properties.

With the development of environmental protection trends, current PE plastic film production processes are evolving towards thinner and more recyclable materials. Through three-layer co-extrusion technology, manufacturers can combine polyethylene raw materials with different properties, allowing the film to maintain high strength while reducing the use of plasticizers, thus better meeting the requirements of green development.