Precautions and characteristics of shrink film purchase

Printing grade PVC shrink film, as its name implies, is used for printing and can be processed into printed labels. Most beverages on the market use PVC labels, such as black tea, green tea and labels used outside mineral water bottles. Ordinary packaging grade PVC heat shrinkable film can be made into tubular film and L-shaped folded film as required, and can be processed into tubular bag and flat pocket. Although ordinary packaging grade PVC shrink film can also be used for printing, the printing effect is not fine, and the number of printable colors is small. Generally, one or two colors are printed according to the majority.

It is widely used in the packaging of various commodities such as wine, food, sporting goods, electronic appliances, daily necessities, handicrafts, building products, audio-visual products, stationery, toys, portals, plastic hardware, glass ceramics, etc., which makes its appearance more vivid and beautiful, improves the packaging grade of products, and plays a protective role in protecting products from dust and flowers. It is an ideal film packaging material at present.

The purchase of PVC heat shrinkable film should be made not only according to the shrinkage price, but also according to the performance of shrink film, etc. Many inferior shrink films are not only poor in quality, but also have pungent smell, which not only pollutes the environment, but also has corresponding harm to products. PVC shrink film sellers suggest that the purchase of shrink film should pay attention to:

1, according to its material to buy.

2. See if the tightening ability of the shrink film meets the standard.

3. Smell the shrink film for pungent smell.

PE shrink film is an industrial film product, which has the characteristics of stretching, large elongation, good self-adhesion and high transparency. It can be used for manual wrapping film, machine wrapping film, and can be widely used for centralized packaging of various goods. PE wrapping film is mainly made by mixing and extruding several different brands of poly (ethylene) resins, which has puncture resistance and good strength. It wraps the goods stacked on the pallet, which makes the package more stable and tidy, stronger and more waterproof, and is widely used in foreign trade import and export, paper making, hardware, plastics and chemicals, building materials and food industries.

Shrink film is the material to replace PVC shrink film. Because PVC contains low toxicity, it is generally not recommended to be used in food packaging, so the base material instead of PVC is replaced by PE. PE is clean and tasteless, so it can be used in both industrial packaging and food packaging. For blown film, the orientation of shrinkage should be made clear at first. Generally speaking, the finished film with large lateral shrinkage is used for manual packaging.

PVC is widely used in our life. Heat shrinkable film is made of vinyl PVC resin mixed with more than ten kinds of auxiliary materials and then inflated twice. Its use method is to calculate the circumference according to the size of the wrapped material, convert the folded diameter (folded diameter =1/2 circumference), and then enlarge the folded diameter appropriately. According to the product specifications of our factory, PVC heat shrinkable film selects appropriate and PVC heat shrinkable sleeve film. Install the casing film on the package, at the temperature of 100℃-160℃ for 6-10 seconds (the actual temperature of the casing film is 86℃, and the temperature of the package is less than 10℃ in winter).

At present, the application of heat shrinkable film in the domestic market mainly shows the following characteristics:

1. It is of great significance to apply the combination of heat shrinkable film and vapor phase antirust technology to replace antirust oil in machinery and hardware tools to enhance the antirust ability;

2. It has been widely used in fast food, ceramic products, tea sets, mechanical parts and other areas;

3. It is used for bottled beer instead of binding rope packaging to prevent bottled beer from hurting people.

4. Heat shrinkable film is also the protector of building and transportation materials. It is suitable for the packaging of many products and the packaging with pallets, which is convenient for transportation and sales, easy to realize mechanization, saves labor and material resources, and can partially replace carton and wooden box packaging;

5. It is used for various bottled beer and beverage labels, which can reduce the process of removing labels and facilitate recycling;

PVC has the characteristics of good transparency, good toughness, no fear of impact, corrosion and low water vapor transmission rate. When the film is subjected to the corresponding temperature, it automatically shrinks and tightly wraps the commodity, thus achieving the function of protecting the commodity, and also playing the roles of moisture-proof, mildew-proof, rust-proof, pollution-proof, breakage-proof and theft-proof. Good stability in storage and transportation, simple packaging technology and equipment, and easy to implement automatic heat-shrinkable packaging.