PE (Polyethylene) bags manufactured by plastic bag factories are produced through film blowing and bag cutting processes. Currently, polyethylene plastic bags are widely used for packaging products in industries such as apparel, toys, electronics, and hardware. PE bags can also be processed into flat bags, self-sealing bags, zipper lock bags, envelope bags, punch-handle bags, tote bags, zip bags, and PE films.

1. PE Flat Bags

PE flat bags feature a relatively simple production process. After the film is extruded by a blowing machine, it is cut into individual bags one by one on a bag-making machine, with the bottom sealed. These bags offer excellent low-temperature resistance (usable at temperatures as low as -70℃ to -100℃) and good chemical stability, resisting corrosion from most acids and alkalis (excluding oxidizing acids). They are insoluble in common solvents at room temperature, have low water absorption, and exhibit superior electrical insulation properties.

2. PE Self-Sealing Bags

Equipped with a plastic bone strip during film blowing, these bags can be sealed manually. They are often confused with zipper lock bags but differ in structure. PE material is odorless, waxy, and retains excellent low-temperature resistance and resistance to most acids and alkalis. Insoluble in common solvents at room temperature, it has low water absorption and good electrical insulation. Also known as compression bags, sealable bags, or zip bags, they are made by blowing and heat-cutting polyethylene (including high-density polyethylene) into bags that can be resealed repeatedly. Widely used for inner and outer packaging of items in the food, apparel, electronics, and other industries.

3. PE Zipper Lock Bags

Made from PE film, these bags are fitted with two interlocking zipper strips (produced separately). Typically, they have relatively wide notches on both sides, which self-sealing bags lack. Unlike self-sealing bags that support limited printing colors, zipper lock bags can accommodate complex patterns and designs.

4. PE Punch-Handle Bags

These bags are modified from flat bags by adding a punch hole at the top for easy carrying. Some variants also include additional plastic film strips at the top to enhance handle durability. The production process requires more manual labor, resulting in a relatively higher cost compared to standard flat bags.

5. PE Zip Bags

Distinguished by a zipper tape and slider attached to the sealing edge, enabling convenient opening and resealing.

6. PE Envelope Bags

Designed with an envelope-like flap (tongue) equipped with an adhesive strip; folding the flap seals the bag. Commonly used for apparel packaging, express delivery bags are also a type of PE envelope bag. Key advantages include:

• Water resistance: Protects contents from rain or water damage during transportation.
• High strength: More durable than kraft paper envelopes, withstanding handling and tearing.
• Easy to use: Self-adhesive sealing allows for quick packaging and opening without the need for tearing or cutting.
• Cost-effectiveness: Approximately 10-20% cheaper than kraft paper envelopes.

For these reasons, gravure printing enterprises are encouraged to launch new plastic film envelope products.

The above outlines the classifications of PE bags produced by plastic bag manufacturers. We hope this information is helpful to you. For further inquiries or details about our products and services, please contact our online customer service or call our service hotline (located at the top right corner of our website). We are committed to providing you with high-quality services!

Article Title: What Are the Classifications of PE Bags Produced by Plastic Bag Manufacturers? URL: https://en.szxylp.com/technical-data/what-are-the-classifications-of-pe-bags-produced-by-plastic-bag-manufacturers.html