19 Apr 2025Plastic bags are common items in everyday life, but not all plastic bags are made from the same material. Different plastics have unique properties that make them suitable for specific uses. Manufacturers using bag making machines must select the right material to meet performance, cost and sustainability requirements.
Low-density polyethylene (LDPE)
Uses: Food bags, bread bags, lightweight packaging, clothing covers.
Features: Soft, flexible, moisture-resistant.
Bag making machine notes: Due to the low melting point of LDPE, standard heat sealers work well.
Applications: Retail shopping bags, garbage bags, supermarket shopping bags.
Features: Stiffer, more tear-resistant, and more affordable.
Bag making machine notes: Sealing temperature requirements are slightly higher than LDPE.
Applications: Reusable shopping bags, food packaging (e.g., snack bags, frozen food bags), promotional tote bags.
Features: Stronger and heat-resistant than polyethylene (PE), with higher print clarity.
Bag maker notes: Requires precise temperature control to avoid deformation during sealing.
Applications: Organic produce bags, compostable trash bags, disposable cutlery packaging.
Features: Can be decomposed in composting conditions, reducing environmental impact.
Bag maker notes: Some biodegradable films require improved sealing technology to prevent brittleness.
Applications: Industrial packaging, medical waste bags, heavy-duty storage bags.
Features: Highly durable and chemically resistant, but difficult to recycle.
Bag maker notes: Less common in modern production due to environmental concerns.
Applications: Trash bags, agricultural films, pallet stretch film.
Features: More flexible and more impact-resistant than LDPE.
Notes for Bag Making Machines: Works with standard sealing systems, but may require adjustments for thicker films.
Modern bag making machine must be able to efficiently handle a wide range of plastic films. Key adaptabilities include:
Adjustable heat sealing – Different plastics have different melting points.
Tension control – Thinner films such as LDPE require precise handling to avoid tearing.
Compatibility with biodegradable films – Certain environmentally friendly materials require adjusted settings.
Elight Smart Packaging has nearly 30 years of experience in plastic packaging machinery manufacturing, focusing on the research and development and production of smart film blowing machines, bag making machines and printing machines. Our equipment complies with international certifications such as CE and is sold worldwide, winning the trust of customers with excellent reliability and efficient solutions. If you have any questions about equipment selection, our professional technical team will provide one-on-one customized guidance to help you find the perfect smart packaging solution.
Plastic bags are not all made from the same material. They are used in a variety of ways - common types of plastic bags include polyethylene (PE) for grocery and retail, polypropylene (PP) for reusable and food packaging, biodegradable plastics for environmentally friendly uses, and polyvinyl chloride (PVC) for heavy-duty applications. Each material has different properties, requiring precise adjustments to the bag making machine's heat sealing, tension control, and film compatibility.
The right material must be selected for factors such as strength, flexibility, cost, and environmental impact to create a high-quality product. Are you choosing a bag making machine for a specific type of plastic? Please send an email to the background to tell us your needs!
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