Shrink Film Packaging: How The Right Melt Index effect on Shrink film

Shrink film packaging is a great way to protect your product and increase sales. However, you need to ensure that you are using the correct type of shrink film for your product.

It would be best to consider a few things when choosing the correct shrink film for your product. The type of material that the shrink film is made from is one of the most critical factors. Different types of materials are better suited for different kinds of products. For example, plastic shrink films are usually best suited for products placed near other plastic materials, such as prescription bottles or packaging for food.

The design of the shrink film also plays a role in its suitability. 

When selecting a shrink film, it is essential to consider the dimensions of your product and the dimensions of the shrink film. The shrink film should be large enough to cover the entire creation but not so large that it becomes difficult to apply. 

A few different types of shrink films are available on the market today.

One type of shrink film is heat-shrunk plastic. This type of film is made from a thin sheet of plastic heated until it shrinks. This type of film is usually used for small products, such as pens or jewelry, because it is easy to apply and does not require special equipment or knowledge.

It is also essential to choose a shrink film design that best suits your product. Shrink films come in various styles and techniques, and it is necessary to choose the right one for your product.

One standard style of shrink film is the peel-and-stick. This type of film consists of a single sheet of adhesive that can be applied to either side of a product. When the film is applied, the adhesive side is placed over the product and then peeled off. The peel-and-stick design is easy to use, but it can be challenging to line up the adhesive correctly.

When selecting a shrink film, it is also essential to consider your production process. Shrink films are often used in manufacturing processes that involve heat or pressure. Choosing a shrink film that will not damage these processes is essential. Common types of shrink films that are safe for these processes include heat-shrunk and pressure-sensitive adhesive films.

Melt Index on Shrink film

Melt index has a remarkable effect on shrink strength and a slight impact on percent TD shrinkage and BUR for balanced shrinkages. In particular, the lower the MI, the higher the shrink strength. It means that for heavy-duty shrink film, a low MI is preferred. Also, an inferior MI corresponds to lower BUR for balanced shrinkage and higher TD shrinkage.

The MWD has only a slight effect on shrink temperature. In particular, a film obtained from a resin with narrow MWD (or low swell) shrinks at lower tunnel temperatures. The presence of slip and anti-block additives does not affect film shrinkage.

Ethylene-vinyl acetate copolymers (EVA) with low vinyl acetate (VA) content give shrink films having the following properties:

(1) Faster shrinkage (higher tunnel production),

(2) Lower shrink temperature,

(3) Higher impact resistance (at low temperature),

(4) Higher puncture resistance,

(5) Lower slip and anti-block, and

(6) Higher gas/moisture permeability.

These films find application both for light shrink-wrapping and for heavy pallet wrapping.

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Vihaan Nagal

संवेष्टन अभियान्ता | Packaging Engineer | Verpackung Ingenieur *Free time blogger *Believe in packaging reform (say naa to orthodox packaging) My life lies between degradable and non-degradable material.

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