The main types of PE film (polyethylene film) can be divided into the following categories based on their density, function, specific application, and manufacturing process:
I. Classification by Density
Low-Density Polyethylene (LDPE) Film
Characteristics: Soft, highly transparent, with good water resistance, moisture resistance, drought resistance, and chemical stability.
Applications: Commonly used in food storage bags, pharmaceutical packaging bags, and fruit and vegetable fresh-keeping packaging.
Manufacturing Process: Mainly produced using extrusion blow molding and T-die methods.
High-Density Polyethylene (HDPE) Film
Characteristics: Tough, translucent film with superior tensile strength, moisture resistance, heat resistance, oil resistance, and chemical stability compared to LDPE film.
Applications: Suitable for making garbage bags, shopping bags, fruit packaging bags, and food packaging bags.
Manufacturing Process: Can be heat-sealed, but not as transparent as LDPE.
Linear Low-Density Polyethylene (LLDPE) Film
Characteristics: Combines the strength and durability of HDPE film with the softness and transparency of LDPE film.
Uses: Widely used in packaging bags, agricultural films, and more.
Medium-Density Polyethylene (MDPE) Film
Features: Soft and highly transparent.
Applications: Commonly used in garment and shoe bags.
II. Classification by Function
Anti-static Polyethylene Film
Features: Highly effective in protecting against static electricity.
Applications: Widely used in the semiconductor and electronic component industries.
Optical Polyethylene Film
Features: Excellent optical clarity, flatness, abrasion resistance, and scratch resistance.
Applications: Used in various optical devices, such as protective films, optical filters, and brightening films.
III. Classification by Specific Application
PE Skin Packaging Film
Features: Primarily used for skin-tight blister packaging, with excellent thermal adhesion and low-temperature heat sealing properties.
Applications: Used for packaging hardware, tool hardware, furniture hardware, automotive parts, and lighting fixtures.
Ultra-High Molecular Weight Polyethylene (UHMWPE) Film
Characteristics: Excellent abrasion resistance, chemical resistance, and low friction coefficient.
Applications: Suitable for the production of high-end protective materials, sliding materials, and more.
IV. Classification by Manufacturing Process
Blown Film Process
Applications: Primarily used for the production of LDPE and LLDPE films.
Calendering Process
Applications: Suitable for the production of various polyethylene films, particularly those requiring wider widths.
