Labeling Innovations from Weber

Paper or plastic?

You have heard this question in the grocery store. However, what do you do when you need a labeling solution to this adage old question? When it comes to labeling, many factors come into play that you may not have even considered. Paper versus plastic refers to both the substrate (what the label is being applied to) and the actual label material itself (paper versus film face sheet).

In labeling, substrate refers to the surface onto which a label is applied. In printing, substrate refers to the surface that is to be printed, meaning that the face material (and top coatings) of a label may also be referred to as a substrate.

The substrate the label is applied is a great starting point to determine the type of adhesive and material that will perform best in the application. The most common substrates are corrugated cardboard shipping boxes and HDPE containers for many markets such as case/pallet labeling, food, and health & beauty to name a few.

A pressure-sensitive label, or self-adhesive label, is made up of three layers: a face stock, an adhesive and a release liner. We refer to this as the "label sandwich." When a label is manufactured, these three components are sandwiched together to create a label material that can be printed on, laminated, die-cut, and finally peeled off and applied to your product.

The facestock is the main part of the label. The material could be paper or film.The adhesive is what makes the label stick to the surface of the product or packaging. Pressure-sensitive adhesive forms a bond when pressure is applied to marry the adhesive with the substrate. The liner is the paper or film that makes up the backing web material.

Check out more information on what is a pressure sensitive label.

The right facestock material must be used to match the application to ensure good adhesion, weather resistance and legibility. Each facestock features certain characteristics for superior performance in specific work environments.

Here are some basic questions you will have to consider for selecting the proper face stock and adhesive combination for the best fit of your label application. 

• What is the substrate the label will be applied to?
• What is the labeling environment?
• What is the temperature range for the product?

Paper The most common and economical type of facestock, paper is used for many simple indoor applications. Paper labels are made of paper. The color, thicknesses, and coatings of paper substrates can vary, but the base layer is still composed of the same raw material.Think short-term labeling.

Plastics BOPP films, PET films and vinyl films that provide greater strength, stiffness, transparency, and resistance to tearing. The flexibility and durability of film label materials allows them to conform and fit about the shape of your product container. Film labels are made from films (like plastic), making them a more durable and flexible material than paper. Designed for longer-lasting applications.

So you want to know, "What is a pressure sensitive label?" Are they stickers, product identifiers, labels or a component of brand packaging? Yes!  Pressure-sensitive labels are used everywhere from toys, food containers, durable products, medical devices, and corrugated boxes, to craft beer can and bottles, cannabis containers, plastic pouches and so much more.

But what are they?

Let's break it down...

A pressure-sensitive label, or self-adhesive label, is made up of three layers: a face stock, an adhesive and a release liner. We refer to this as the "label sandwich." When a label is manufactured, these three components are sandwiched together to create a label material that can be printed on, laminated, die-cut, and finally peeled off and applied to your product.

Facestock

The facestock is the main part of the label. The material could be paper, film, or metallic foil. This is the layer where the ink is applied on press. For specific applications, a topcoat or laminate may be applied to protect the label artwork or enhance certain areas of the design.

Adhesive

The adhesive is what makes the label stick to the surface of the product or packaging. For glue-applied (cut & stack) labels, this process happens as the label is being applied. A pressure-sensitive label is manufactured to have the adhesive already applied to the face stock when you receive your roll or sheet of labels.

The adhesive type will depend on your application and environment in which the label will be used. Many different types of adhesive are available including versions that stick under cold and wet conditions, some that release easily, some that stick permanently and others that are resealable.

For example, a label that is applied to a durable good, like an air conditioner, will require an adhesive that sticks to metal in an outdoor environment and can last for years. A rubber-based adhesive is aggressive and best for long-life applications.

If the label is only going to be used once, say for a shipping carton label, a strong adhesive isn't necessary. These adhesives are usually acrylic-based and stick more aggressively as they dry, usually over hours or days.

You might even want to select an adhesive that is re-positionable for a peel and redeem coupon.

Liner

The liner is the paper or film that makes up the backing web material. There are options that range from semi-bleached paper or craft paper, to a stronger clear film liner. The liner is coated with a special material that makes it possible to remove the label no matter how strong the adhesive you select.

Paper-based liners are strong yet easily perforated or torn if needed. Film liners are much strong, though slightly more expensive, and work well when there is tension on the label roll when applying the labels.

And there you have it - our label sandwich explained! If you have more questions or want to get more details about label construction, contact us to talk to one of our label experts. They can supply you with samples, quotes or do label testing for your application.