Wholesale Shrink Bags
A shrink bag is a product with a thickness usually between 45 to 110 µm (micron) made from high-shrink film. The shrink wrap bag is sewn on three sides and has one open side. The method of operation for shrink bags is such that when the product is placed inside the bag and heated to approximately (80 to 110 degrees), the bag shrinks and adheres to the product. Like the rest of the shrink family, these warp-type bags also have a transparent surface, flexibility, and resistance to tearing and puncturing. We will continue with the other specifications of this product.
| Property | Unit | Typical Value / Range |
|---|---|---|
| Total Thickness | μm (microns) | 48 ± 10 % |
| Shrinkage (Water bath 75 °C) | MD / TD % | 20 / 25 % |
| Shrinkage (Water bath 85 °C) | MD / TD % | 33 / 40 % |
| Shrinkage (Water bath 95 °C) | MD / TD % | 47 / 50 % |
| Water Vapor Permeability | g/m²·day @ 23 °C / 50% RH | < 1 g/m²·day |
| Oxygen Permeability | cm³/m²·day·bar @ 23 °C / 0% RH | 8 – 13 cm³/m²·day·bar |
| CO₂ Permeability | cm³/m²·day·bar @ 23 °C / 0% RH | 30 – 45 cm³/m²·day·bar |
| Mechanical Strength (Force) | N @ 23 °C / 50% RH | 6.9 N |
| Work | mJ @ 23 °C / 0% RH | 9.1 mJ |
| Deformation | mm @ 23 °C / 0% RH | 3.0 mm |
| Material Structure | – | Co-extruded multilayer, including high-barrier EVOH |
| Transparency & Gloss | – | Excellent clarity and high gloss |
| Puncture Resistance | – | High puncture resistance |
| Seal Type | – | Overlap sealing capability |
| Processing Compatibility | – | Compatible with all sealing, clipping & shrink equipment |
| Typical Applications | – | Fresh & processed meats, cheese, etc. |
Types of Shrink Warp Bags
Below are some examples of different types of shrink warp bags.
PVC Shrink Bags
These shrink bags made from polyvinyl chloride have a lightweight, high clarity, and effective shrink performance; they can also be packed with less heat. This bag is generally suitable for non-food items such as books and digital items.
POF Shrink Bags
Odorless and chlorine-free, with a glossy appearance and FDA standards for direct contact with food. It is more resistant than PVC and is recommended for food packaging.
PE Shrink Bags
This type of shrink bag is somewhat similar to stretch capabilities and it is suitable for packaging heavy shipments. Therefore, it has high puncture resistance and thickness and is often used for industrial transport.
Features of Shrink Bags
Protection Against Moisture, Dust, and Contamination
The warping of this bag is done in a tight manner without open pores, preventing the infiltration of various environmental contaminants and moisture.
Tamper-evident Effect
If someone tries to open the bag after packaging and applies heat, the shrink bag will change its appearance and show evidence of tampering. Other packaging films usually revert to their original state due to “plastic memory” when stretched and heated, but this type of shrink packaging is different.
Customization and Printability
Logos, product information, or brand identity can easily be printed on the film. The smooth and uniform surface of the film has a high affinity for ink or print colors and provides optimal graphic quality.
High Durability and Mechanical Resistance
This shrink wrap is made of polyethylene and polyolefin compounds with long molecular chains, which provide significant mechanical resistance. For this reason, it is resistant to tearing, puncturing, wrapping, and deformation.
Environmental Compatibility and Recyclability
These films are designed with polymers that fall within recyclable standards, and some formulations are free from chlorine and BPA. The film can be collected in polyethylene or polyolefin recycling streams and reused.
Applications of Shrink Bags
Food Industry and Storage
Due to reduced air contact and contamination, increased shelf life, preservation of freshness, strong shrinkage, and sealing capability, this film is suitable for packaging various meats, poultry, vegetables, and pre-packaged foods.
Electronics and Sensitive Parts
Shrink bags are a suitable option for small parts and electronic boards because of their puncture-free covering, which protects delicate surfaces and prevents scratches or unintended contact, thus guarding against dust and surface damage.
Pharmaceutical and Hygiene
For packaging tablets, syrups, and hygiene products with Tamper-evident features, it ensures that any opening of the wrap is easily detectable for consumer assurance, while also allowing for printing information and health slogans.
Construction Industry and Large Parts
For packaging windows, leather products, or large parts during transportation. Due to complete protection and compatibility with complex shapes through heating and intelligent shrinkage, this product is an ideal choice for the construction industry.
Why Choosing SupraPol as Your Supplier?
SupraPol, as a plastic product supplier, prioritizes exporting high-quality products at reasonable prices to various parts of the world across five continents. One of our significant advantages is providing consultation and guidance to our clients throughout the entire purchasing process, as well as assisting those who seek advice and detailed information about specifications and other related details.
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