1. Household wrapping film (refrigerator plastic wrap)

 

Household wrapping film is also called refrigerator cling film or self-adhesive cling film. At present, most of them are LDPE cast film in China. It has a certain degree of resilience and good self-adhesiveness, and is often used for wrapping packaging of fruits, vegetables or meat. Then store the packaged items in the refrigerator, which has the effect of preventing the smell of food from passing through. When the food deteriorates, it can prevent it from polluting other nearby foods, and at the same time, it can also prevent the food from being packaged during storage. Moisture volatilization; Refrigerator plastic wrap can also be used to cover the opening of the container of the container and the opening of the cut fruit, and can also be used for sales packaging of clean vegetables and cut meat.

 

At present, the fresh-keeping function of the self-adhesive plastic wrap on the market in China is mainly to inhibit water evaporation and prevent food odor contamination and cross-contamination of spoiled food. Supermarkets include refrigerated food and non-refrigerated food (fruits, vegetables, meat, Fish, bread, pastry and microwave food, etc.), a large number of self-adhesive plastic wrap is used. In addition, when the film is used for packaging, it also has a certain inhibitory effect on the diffusion of oxygen and carbon dioxide. On the basis of ordinary self-adhesive plastic wrap, some industrially developed countries have developed products that absorb ethylene gas (ethylene gas can accelerate the ripening and spoilage) and functional fresh-keeping film with antibacterial properties, which have a better fresh-keeping effect on fruits and vegetables.

 

2. Industrial wrapping film

 

1. Integrated packaging

The most widely used industrial winding packaging is integrated packaging, which uses the super strong winding force, good retractability and surface viscosity of the film to tightly and fixedly bundle the products into a unit, so that the scattered small pieces can be integrated into one unit. As a whole, the product will not loosen or separate even under adverse circumstances. In the integrated packaging, it is also possible to realize the function of compression and fixing. With the help of the stretched retraction force of the stretch film, the product is wrapped and packaged to form a compact unit that takes up less space, or the product and the pallet are tightly packed. Wrapped together, effectively prevent mutual dislocation and movement of products during transportation. The proper elasticity of the wrapping film can make hard products stick closely and soft products shrink, and it has a unique packaging effect in the packaging of tobacco and textiles and other commodities.

 

2. Individual wrapping

 

Single wrapping forms a very light, protective packaging film layer around the product, so as to achieve the purpose of dustproof, oilproof, moistureproof, waterproof and anti-theft. There are many forms of single packaging, such as full-width winding packaging, reel winding packaging, cable twisting packaging, etc. The items packed in a single winding packaging are evenly stressed, which can avoid damage to the items caused by uneven external forces. Packaging methods such as bundling and packing cannot be done.

Stretch film has a wide range of applications, such as grain, food, cans, beer, beverage cans, plastic bottles and other canning industries, candy, gifts, paper, stationery, refractory materials, aluminum profiles, wood, carpets, textiles, clothing felts , chemical fertilizers, plastic resins, chemical raw and auxiliary materials, carbon black, tires, books, glass, ceramics, cement, cigarettes, electrical and electronic products, wires, supermarket distribution middlemen, retailers, export transportation in bazaars and border trade markets, and cargo transportation at airports , Railway LTL cargo transportation, etc.

 

3. Grass winding film

 

Grass wrapping film is basically the same as ordinary industrial wrapping packaging. The differences between them need to pay attention to the following aspects. One of the pasture wrapping films is to improve the weather resistance of the film and prevent the film from aging and damage during storage after the pasture is packaged; the other is to reduce the absorption of light energy by the pasture and prevent the pasture from rotting due to high temperature; The third is that pasture wrapping film should be avoided from being mixed with pasture, so as to prevent livestock such as thin film barium from eating by mistake and endanger the health of livestock. Therefore, when producing pasture stretch film, rutile titanium dioxide masterbatch is often added to make a white, light-transmitting stretch film (you can also add blue masterbatch or green masterbatch to produce blue or green stretch film ).

Practice has shown that feeding cows with pasture wrapped in wrapping film can increase milk production by more than double that of using naturally dry grass; feeding sheep with pasture wrapped in wrapping film can deliver one more lamb a year than the traditional way of raising sheep . Compared with traditional cellar storage and bag storage, the use of pasture stretch film to store pasture has many obvious advantages.

 

Stretch film is conducive to the collection of bulk materials and the advantages of convenient transportation, so that its application in building material packaging has shown great advantages. In recent years, stretch film and stretch film equipment for building material packaging have also made great progress.

 

Nanjing Sumino Seiko Machinery Co., Ltd. has a professional cast film production line. The company's main cast film production lines include: TPU hot melt adhesive film production line, CPP/CPE cast film production line, EVA solar energy packaging film production line, PE hygienic and breathable Film production line, PVDF cast film production line, PP three-dimensional film production line, medical blood purification film production line, multi-layer co-extruded barrier film production line, LLDPE stretch film production line, etc.