Plastic bags are now more versatile than ever. The most common methods for manufacturing these types of products include blown film extrusion, sheet extrusion, winding, and casting. Blown film extrusion is a highly flexible process that produces bags in different shapes and sizes. This method is also commonly referred to as tubular film extrusion. In this process, the plastic tube is melted in a die and then cool air is forced through the center, causing the plastic tube to balloon. Once the film bubble is cooled, it runs through a flattening roller, which causes the material to shrink and stretch. The plastic tube is then slit to create multiple sheets and can be treated to reduce seams.
Plastic bags are a versatile form of packaging, with many applications. They’re a useful choice for food storage, transportation, and waste disposal. The simplest definition of a plastic bag is that it is a thin flexible plastic film that is open at one end. They are typically one-half to two-thirds transparent, and can carry as much as 25 kg. The most common types of plastic bags are polyolefin and paper bags.
A more durable option is medium-density polyethylene. This is a semi-translucent milk-white plastic that has better puncture resistance and temperature resistance than LDPE. The material’s thickness and rigidity make it an excellent choice for food packaging. A medium-density polyethylene (HDPE) bag is less opaque than LDPE but is stronger than both of them. Both have their advantages, but there are pros and cons to each.
Low-density polyethylene bags are often milk-white or clear. They are ideal for consumer packaging without any strength requirements. These bags are easily stretchable and opaque, with a low barrier to moisture and gas. These are excellent options for food packaging. The main disadvantages of low-density polyethylene bags are that they are more brittle than HDPE. In addition to being less transparent than HDPE, they tend to be more rigid.
High-density polyethylene bags are usually made of milk-white or semi-translucent polyethylene. These films are also resistant to heat and puncture. These materials are durable and biodegradable. They are also recyclable. Most packaging manufacturers use plastic bags for food and beverages. A number of companies specialize in these types of products. They can be found on the Thomas Supplier Discovery Platform. If you are looking for a manufacturer of high-density plastic bags, there are many suppliers in this market.
The Schur Flexibles Group is a leading European packaging manufacturers with bags. Its portfolio includes plastic bags and other types of film. The Mondi Group is headquartered in Vienna, Austria. The Novolex company manufactures a variety of packaging products for retail, food service, and industrial markets. The Goglio Group and Novolex both have global operations. These companies have a variety of product categories. Using the Thomas Supplier Discovery Platform, you can find a supplier that can best meet your needs.