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Polyethylene (PE) vs. Polypropylene (PP) Bags - Selection Guide

Jul. 21, 2022
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When choosing a plastic bag, there are usually two options to consider: polyethylene (PE) or polypropylene (PP) plastic. Although polyethylene and polypropylene bags are both plastics, they are not typically used for the same purpose or product. Deciding which type of plastic packaging to use depends on your specific needs and application.


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Choosing the best type of plastic bag

What is a polyethylene bag? 

Polyethylene bags are translucent or opaque with a slight haze that allows you to see the contents, although the details of the contents are not clear. Polyethylene bags are ideal for packaging goods or items that require a high degree of protection. Most industrial companies use polyethylene bags to package and store large, heavy items, such as industrial process parts. Key features of polyethylene bags include.

● Translucent or opaque

● Tear-resistant

● Flexible

● Durable

● Low abrasion

● Soft and pliable

 

What is a polypropylene bag?

Polypropylene bags are crystal clear and perfect for the food and medical industries or any other industry where consumers need to clearly see the product before they buy it. Key features of polypropylene bags include.

● Durability

● Corrosion resistance

● Crystal-clear transparency

● Flexibility at higher temperatures

● Hard and rigid plastic

● Highly resistant to the environment

 

Before deciding which plastic bag is best, consider your specific business needs, your budget, and how you want to package your product and present it to your customers.

 

Polyethylene (PE) Bags

Polyethylene has several advantages, including a very high melting point and freezing point. It is made by polymerizing ethylene (or vinyl) monomers. Polyethylene is made through the addition or free radical polymerization of ethylene (olefin) monomers. Some of the properties and advantages of polyethylene bags include.

● Inert and translucent for low static charge

● Protects contents by preventing excessive light from entering the bag

● Reduces dust, dirt and other unwanted foreign organic elements

● Lower cost than polypropylene

● More resistant to low temperatures and abrasion

 

Common types of polyethylene bags include

High-density polyethylene (HDPE): has densely arranged and bonded molecules that make this type of polyethylene rigid, strong and durable.

Low-density polyethylene (LDPE): LDPE is produced by the polymerization of free radicals, resulting in the branching of long and short chains. This type of polyethylene is flexible, has low tensile strength and is durable.

Linear low-density polyethylene (LLDPE): LLDPE is very strong and durable. It has higher tensile strength and durability than LDPE.

 

Typical applications of polyethylene bags

Polyethylene bags are used in a variety of household and industrial applications, including the manufacture of pipes, bottles, cans, tubing, plastic film packaging, polyethylene food bags, and more.


Polypropylene (PP) Bags 

Polypropylene bags have a clearer appearance and higher tensile strength, and are more heat and chemical resistant than polyethylene bags. Polypropylene packaging can be made with rigid protective edges, making it ideal for packaging solutions that prevent scratching of products or contents. It also offers unmatched protection against moisture, steam and debris. Some of the specific features and benefits of polypropylene bags include.

● Greater resistance to chemicals, heat and scratches

● Hard and rigid plastic

● Crystal clear for excellent product presentation

● Unparalleled vapor and moisture barrier

● Meeting FDA and USDA specifications and requirements

 

Typical Applications of Polypropylene Bags

Polypropylene bags are commonly used in food packaging, electronics manufacturing and hospitals to protect the contents from contamination. They are also used to package a wide range of consumer products in a wide range of industries and applications, including the automotive industry.

 

Fengyi's packaging solutions

Polyethylene and polypropylene are undeniably the two most common types of plastic bags used today. When deciding on the best choice for your needs, it is critical to understand the advantages of each option. If you need help in choosing the right product, contact Fengyi today. 

 

As an industry-leading plastic bag manufacturer with 20 years of experience, Fengyi knows how to produce plastic bags in a cost-effective manner that meets the expected quality and durability required for your content. We can customize the perfect solution to provide you with the plastic bag that best meets your needs. Our team will produce a custom product in any size or color with your text, shape, image or logo printed on it. Contact us today for a quote.

 

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