Types of Plastic Bags for Packaging

Plastic bags are used in a variety of applications. They can be used to store and transport foods, protect and preserve fragile items, and more. Various kinds of bags are available, including those made of polyethylene, paper, and even non-woven materials. Some also feature handles and gussets. A few can be closed or opened by zipper strips.

The type of bag you choose depends on its use. For instance, for shipping food, you'll want a puncture-resistant bag that's made to be able to hold liquids. If you're looking for a more durable bag for storage, look for one that's thicker. In addition, some bags are recloseable and reclosable, so you can reuse them over and over.

Low density polyethylene (LDPE) is a common polyolefin, or polymer, used in plastic packaging. It's often white or clear, with good moisture barrier properties. LDPE is softer and easier to tear than other types of poly bags, but has a lower tensile strength, making it prone to stretching. However, it's still a good choice for packaging items that don't require high strength.

High-density polyethylene is a more solid plastic with a long linear structure. This type of plastic is commonly used to make pipes, industrial components, and more. Because it's dense, it's ideal for packaging. Depending on the type of polyethylene, the chains can be long, short, or irregular.

Polyethylene is made from ethylene, a natural gas, which is bonded with hydrogen atoms. This gives it the ability to form long, straight chains, which makes it durable. It's also flexible and lightweight. Since the molecules are arranged in a linear fashion, it has an even, uniform shape.

In addition to being transparent, LDPE bags are often dyed to get a specific color. Food-safe LDPE bags are also available. These are perfect for single-use produce bags. Also, they have FDA approval for packaging food.

For packing large and bulky items, look for gusseted poly bags. Gusseted bags have extra panels that give the poly bag a rectangular shape. When you're shopping for a bag, you'll need to measure its length and width to determine the correct dimensions.

Polypropylene is another plastic that's ideal for packaging. Polypropylene has low density and is FDA approved for food packaging. Besides being able to delay evaporation, it's also clear, so you can easily see what you're packing. Besides being strong and clear, it has standard zip track closures.

Another option for shipping food, or any other type of products, is a biodegradable bag. Bags such as these include a variety of different types of garbage and are able to break down over time, with a few important international standards to help verify their compostability. Whether you're looking for a durable and puncture-resistant bag or a reusable one, Universal Plastics has you covered. With their vast selection, you'll be able to find the right kind of bag for your needs.

There's also a wide variety of plastic tubing available, which can be inserted from both ends or cut to your desired length. You can then close the tubing with ties, staples, or tape. Alternatively, you can heat seal the tubing at its one end.