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Food-grade stretch film comes in various types, each serving a unique purpose in food packaging and preservation.
Standard Stretch Film
Standard plastic food wrap is the most commonly used stretch film. This is used for general food packaging. It offers a balance between strong adhesion and clarity. Its cling properties securely wrap food items. Thus, it prevents air from entering and causes spoilage. Its flexibility enables it to conform closely to the shape of products. This reduces the possibility of air pockets.
Pre-Stretched Stretch Film
Pre-stretched plastic wrap is greatly minimized in its stretching during application. This allows for greater control over its tension and usage. This type of film comes with reduced tension. This places less stress on both the product and the packaging. Food products that require stable protection will greatly benefit from this film.
Vented Stretch Film
Vented saran food wrap is specifically designed with small perforations or vents throughout the film. These allow for minimal airflow between the wrapped items and, at the same time, reduce moisture buildup. This vesting helps prevent condensation. Thus, will make it ideal for packaging fresh products such as fruits, vegetables, and meat.
Biodegradable Stretch Film
As environmental concerns greatly increase, biodegradable plastic wrap is becoming a viable alternative to conventional plastic films. These films are made from natural polymers. Thus, they are designed to break down over time when disposed of correctly. This film provides adequate protection and will be a plus for companies focusing on sustainability.
Colored and Indicator Stretch Films
Colored stretch films are, in fact, used for both security and differentiation purposes in food packaging. These films commonly come in various colors. Thus, they are suitable for identifying specific products or batches. These films also assist in preventing tampering with food products during transportation. On the other hand, indicator stretch films will change color in the event that the package has been breached. This will provide clear visual evidence of contamination or exposure to conditions.
Among the key elements of stretch film, two advantages stand out in standard plastic film. These are durability and waterproofness, ensuring optimum protection for food products.
Durability
Plastic food wraps are manufactured from high-quality polyethylene or polypropylene. These provide exceptional tensile strength. The tight molecular structure of these materials makes it difficult to tear or puncture the film. Thus offering a protective barrier against external elements. The film is designed to withstand stretching without causing breakage. This allows it to envelop products tightly. Durable food wrap maintains integrity during stacking, transportation, and storage.
Waterproof
Waterproof features on food-grade stretch film play a key role in preventing moisture from affecting the safety and quality of food. The film's sealed surface keeps water and liquids at bay. This keeps the food fresh and dry. Moreover, the film also protects food products from unforeseen leaks that may occur during shipping. Since it is waterproof, it also inhibits the absorption of unwanted moisture. This makes it entirely suitable for packaging foods with high moisture content. Such foods are fruits, vegetables, and meats.
Choosing the correct stretch film for food products entails considering factors that affect performance, application, and sustainability.
Thickness and clarity
The thickness of the stretch film greatly impacts its strength and flexibility. Films with greater thickness will usually provide more protection and security. At the same time, they will prevent puncturing during handling. Those with thinner gauge are easier to apply. In addition to that, they add less weight to shipments. Another key element in packaging food is clarity. Contrary to belief, a clear film allows inspection and visibility of products. Thus, assisting in determining their freshness.
Type of food packaging
The food grade stretch film is not exclusively a single kind of film. It is, therefore, essential to consider the specific requirements of the food products when selecting the film. Pre-stretched film will best serve products that require extra tight wrapping. This is because it results in less film wastage. Films with perforations will do well with items needing ventilation. Such items include meats and dairy products. This is because the vents aid in airflow and moisture escape.
Compatibility with packaging machinery
Another consideration when selecting food wrap is the compatibility of the film with the existing packaging machines. Companies that rely on automated or semi-automated wrapping processes will be better off using films with appropriate gauge and stretch. These ensure proper mechanical delivery with no film breaks. Another point worth mentioning is that custom film widths and lengths will help reduce downtime. This is because they are fully compatible with the machines.
Environmental concerns
With the rising need to reduce plastic waste, sustainable packaging options are increasingly in demand. Buyers who are eco-conscious should consider biodegradable stretch film as a key alternative. Other than that, using plastic wrap for food in bulk will reduce the number of films used and may help reduce the carbon footprint.
Food-grade stretch film can be paired with other packaging materials and practices to enhance the overall preservation, presentation, and safety of food products.
C Containers
Food plastic sheets can work well with rigid containers such as plastic or foam trays, boxes, and clamshells, among others. When wrapped with stretch film, these containers add an extra layer of protection to the item. The film conforms tightly around the product. This will reduce air exposure and keep the product from drying out or going stale. Stretch film also provides a transparent view of the contents in the containers. Thus giving the food an attractive look to customers.
Cardboard Boxes
Boxes made from cardboard or any other material can greatly benefit from plastic wrap. The film will provide a vacuum-like seal that protects food from moisture, dust, and pests. It also gives an added layer of cushioning within the boxes. This shields delicate items from damage during transport. The use of stretch film on boxes will also increase the security of the package. Preventing unauthorized tampering with the food before it gets to the consumer's hands.
Bulk Bags
Bulk foods like grains, pasta, and nuts can be wrapped in stretch film bags to protect them from moisture and contaminants. These bags are produced from durable plastic and are lightweight. The food inside the bags is able to have an extended shelf life due to the airtight characteristics of the film. It is commonly used in warehouses and retail displays to keep products organized and visible to customers.
Use with Insulated Packaging
Insulated containers or coolers used for transporting perishable items such as meats, dairy, and seafood can be paired with stretch film. The stretch film inside the container secures the products tightly against the insulation. This will greatly reduce heat transfer and keep the food at the desired temperature. The combination of both materials will increase overall effectiveness in maintaining freshness during long-distance shipping.
Plastic food wrap does not have a specific expiration date. However, manufacturers recommend it be used within a year of purchase. For the best results, however, the stretch film should be stored even after its date of purchase in a cool, dry location. That way, its sealing and cling properties will still be efficient.
Recycling options for the stretch film are limited due to its high cleanliness level. It can, however, be accepted at certain drop-off locations or mobile recycling programs that process plastic film. Most municipal recycling programs do not accept it because of its high contamination level.
The film extends the food's shelf life by keeping it fresh and preventing spoilage from air exposure, moisture, and contaminants. It protects food from freezer burn when tightly wrapped around items in the freezer. This maintains quality and prevents food from developing off odors or textures.
Yes, but polyethylene or polypropylene films are mainly suitable for wrapping food items. They can also be used to wrap non-food items. These items are usually products that require protection against moisture, dust, or physical damage during storage or transportation. These films must be clearly distinguished from industrial stretch films. There are always stricter regulations regarding films that come in contact with food.
