Stretch film is also called wrapping film and packaging film. Its base material is LLDPE. It is generally made by adding adhesive additives such as PIB masterbatch to PE film material and then casting it. It is a linear low-density polyethylene. The surface is slightly sticky and can stick to each other.Let’s take a look at the classification of stretch film.
Types of stretch film
Stretch film can be classified by its color:
1.Transparent stretch film
Transparent stretch film has good glossiness and is close to transparent. When using transparent stretch film to wrap items, you can still see the goods clearly. Many supermarkets use this material to wrap food, ensuring hygiene while improving visibility. Stretch film is also used by companies to package and display samples. After packaging, you can still see the items inside, which has the effect of dustproof, moisture-proof and beautiful.
2.Black stretch film
As the name suggests, black stretch film is black in color. You cannot see the items inside through the film. This type of stretch film is mainly used to pack items that require privacy. The effect of isolating vision can play a good role in preventing theft and peeping.
3.Colored stretch film
This type of stretch film comes in a variety of colors, and the purpose of use varies from person to person. Some uninformed buyers may worry that colored stretch film is added with toxic chemical dyes and dare not use it. In fact, colored stretch film is added with masterbatch during the production process. It is a non-toxic and odorless safe product, so everyone can use it with confidence.
Stretch film can be classified by size:
1.Mini stretch film
Mini stretch film is generally 0.3~1kg. This small-sized stretch film is suitable for packing smaller items, such as some small parts and accessories.
2.Hand stretch film
The size of hand-held stretch film is generally 1.5~4kg. This specification can be used to pack large and medium-sized items, and can also play a fixing role.
3.Machine stretch film
Most machine stretch films are over 10kg in weight and are operated by machines to pack and secure large cargo.
Classification by other methods:
1.According to the packaging method, stretch wrapping film packaging can be divided into: manual stretch packaging, damping stretch packaging, and pre-stretch packaging.
2.According to the material classification, stretch film can be divided into polyethylene stretch film, polyvinyl chloride stretch film, ethylene-vinyl acetate stretch film, etc. At present, the stretch film produced and used in large quantities is based on linear polyethylene. Polyethylene stretch film has become the mainstream of stretch film.
3.According to the structure of the film, stretch film can be divided into single-layer stretch film and multi-layer stretch film. Generally speaking, only one side has viscosity, so it is often called single-sided adhesive stretch film. With the improvement of film production equipment and technology, the advantages of multi-layer stretch film, which is conducive to improving product quality and reducing product costs, are becoming more and more prominent. At present, the single-layer stretch film has a trend of gradually decreasing.
4.According to different processing methods, stretch film can be divided into blown stretch film and cast stretch film, and cast stretch film has better performance.
5.According to the usage, stretch film can be divided into stretch film for industrial packaging (such as home appliances, machinery, chemicals, building materials, etc.), stretch film for agricultural packaging and stretch film for household packaging.
The above is the classification of stretch film. I believe that everyone has a further understanding of stretch film. You can refer to these classifications during use. The choice of stretch film should be determined according to specific packaging needs, product characteristics and use environment to ensure the safety and effectiveness of packaging.
