What Is a Shrink Labeler?
A shrink labeler is a machine that applies heat to shrinkable film labels, wrapping them tightly around products such as PET bottles.
Products are fitted with oversized labels and then passed through the shrink labeler. Inside, heat is applied, causing the label to shrink and conform to the product’s shape. This process results in a tightly fitted shrink label.
An example is a polypropylene (PP) salad dressing bottle with a polystyrene (PS) shrink label covering the bottle and cap. The label includes perforations for easy cap opening and can be peeled off for recycling or disposal.
Shrink labels are versatile, fitting containers of any shape, including those with caps or lids. They are widely used in beverages, food products, daily necessities, and pharmaceuticals.
Similar to a shrink labeler, the L-type shrink system also uses heat-sensitive film to fully wrap products.
Uses of Shrink Labeler
Shrink labelers are primarily used for applying labels to beverage containers, cosmetic products, and condiments. They are suitable for labeling PET bottles, aluminum cans, cosmetic containers, and food condiment packaging. The labels can also serve as tamper-evident seals on cup-shaped confectionery items.
Principles of Shrink Labeler
To apply a shrink label, a heat-shrink film is cut into a cylindrical shape and fitted over the product. The shrink labeler then applies heat, using either hot air or steam, causing the label to shrink and tightly adhere to the container.
The label’s appearance is crucial for product image, and manufacturers have developed various methods for attaching and heating labels. To prevent product damage, parameters like heating temperature and duration are adjustable.
Films used include PS, PET, and environmentally friendly options like biodegradable and plant-based films.
How to Choose a Shrink Labeler
When choosing a shrink labeler, consider its shape, size, throughput, initial and running costs, label finish quality, and product handling versatility. The label’s appearance impacts the product’s image, so consistent, high-quality labeling is vital.
For diverse product ranges, select a shrink labeler with broad compatibility, including irregular shapes and eco-friendly films. Some manufacturers offer free sample creation, allowing for quality evaluation before purchase.