In our daily life, we are more familiar with the more common and used to belong to cling film, especially at home, there is a leftover, half of the watermelon and so on can use cling film to be safe in the refrigerator, and this can also avoid a variety of dishes because of the flavor of the cross-flavor situation. Cling film is usually white and transparent, and stretch film is the same, the first time I saw the stretch film friends, I believe my first instinct was: “Isn’t this super-large cling film?” This has aroused everyone’s questions, what is the difference between stretch film and cling film? is cling film stretch film? What is the difference between the two? Although stretch film and cling film material are almost the same, the use, specifications, production process, and so on have apparent differences. Today I will tell you the difference between the two.
| Different ingredients of raw materials
Cling film is a kind of wrap film, but because it does not need as high self-adhesive performance as stretch film, the use of polyisobutylene will be less, polyisobutylene is mainly used to increase the flexibility and self-adhesive products.
Cling film is a kind of plastic packaging product for fresh-keeping food, the main cling film on the market at present are:
1. Polyethylene, this material is mainly used in food packaging, such as fruits, and vegetables, including semi-finished products back from the supermarket with this material;
2. Called polyvinyl chloride, which can also be used in food packaging;
3. Acrylate, which is mainly used for the packaging of some cooked food, etc.
Because plasticizers used in PVC films are carcinogenic, and the production cost of PVDC is too high, so most domestic cling films are inclined to use PE as raw material.
PE is a bit like plastic bags, the material is cheaper, and PVC bags of food look brighter. The kind of household is generally PE film, and supermarket packages of fresh fruit and vegetables are PVC.
Stretch film, also known as tensile film, Heat shrinkable film, is the earliest domestic PVC as a substrate, and DOA plasticizer, and plays a self-adhesive role in the production of PVC stretch film. Due to environmental problems, high cost (relatively large proportion of PE, less packing area per unit), poor tensile properties, and other reasons, when the domestic production of PE stretch film began in 1994-1995, it was gradually eliminated. At first, Eva was used as the self-adhesive material of PE, but its cost was high and it had flavor. Later, PIB and VLDPE were used as the self-adhesive material. Now LLDPE is the main substrate, including C 4, C 6, C 8, and metallocene PE (MPE).
PE stretch film is an industrial film product, with high tensile strength, elongation, self-adhesive, high transparency, and other points. The manual stretch film can also be used for machine stretch film and can be widely used in a variety of goods concentrated packaging.
PE stretch film is mainly extruded by mixing several different grades of polyolefin resin, which has the properties of puncture resistance, super strength, and high performance, more super waterproof, and is widely used in the export, paper, hardware, plastic chemicals, building materials, food and pharmaceutical industries.
LLDPE stretches film: LLDPE stretch film is made of high-quality LLDPE as substrate, without adding high quality tackifier, through heating, extrusion, casting, and then cooling by cooling roller, it has the advantages of strong toughness, high elasticity, tear resistance, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, dustproof, waterproof, one-sided and two-sided adhesion, etc. , it can save material, labor force and time in use. It is widely used in papermaking, logistics, the chemical industry, plastic raw materials, building materials, food, glass and so on.
PE slitting stretch film: is based on high-quality LLDPE, does not add high-quality tackifier, by heating, extrusion, casting, and then cooling by cooling roller, it has the advantages of strong toughness, high elasticity, tear resistance, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, dustproof, waterproof, one-sided and two-sided adhesion, etc., it can save material, labor force and time in use. It is widely used in papermaking, logistics, the chemical industry, plastic raw materials, building materials, food, glass and so on.
| Different application
Cling film is used to wrap food and is commonly used in homes to wrap cooked foods, refrigerate, keep meat fresh and protect small items.
For example, if you have leftovers, wrap them around your plate. Keep them fresh in the fridge, as well as fruit, or use plastic wrap. Mainly refers to food.
A stretch film is used for wrapping things. Not for eating, but for industrial use
Stretch film (Stretch wrap film) is also called elastic film. It can be used to Stretch and wrap the goods tightly by the viscoelasticity of the film’s surface and the tension used during use, to achieve the goal of protecting goods.
The supermarket is often used to stretch film, such as hit cardboard goods, and then you have to wrap the whole goods with the film. So that it won’t break up when you use the forklift again. Otherwise, it will all fall down when you pull the goods.
Stretch film can be used for transport packagings, such as large pallets of winding packaging, containers, and boxes of winding packaging can also be used for short-distance transport and sales packaging, such as commodity packaging, the winding packaging of stainless steel pipe, plastic pipe and profile, plastic decorative board, winding floor, winding carpet, etc.
The method of use can be divided into machine-used stretch film and hand-used stretch winding film, most of the stretch winding film is transparent, and a small number of black machine-used stretch film is mainly suitable for more expensive products, being unnoticed can effectively prevent theft.
Fresh-keeping bags are a kind of stretch wrap film, but because it does not need as high self-adhesive properties as the stretch wrap film, therefore, the demand for polyisobutene will be less and less, polyisobutene is used to improve the flexibility and self-viscosity of commodities.
| Different specifications
The thickness of the stretch film is thicker than the cling film, and the size is larger than the cling film. Commonly used broadband specifications are 45cm, 50cm, and thickness of 8u-50um, there are a variety of customizable sizes
The fresh-keeping film is generally large in size width of 30cm, and a thickness of about 10um;
| Different stretch ratio
The stretch ratio of the stretch film is 300% -800%, which is made of LLDPE or LDPE by tape casting or direct blow molding machine.
The cling film has a stickiness to the article, and the stretch film is self-adhesive, which is related to the use of polyisobutylene
| Different price
As the stretch film is for industrial use, customers buy in bulk, and the price of cling film than stretch film is expensive.
| Different starting points for environmental protection
PE, the material of the stretch film, can reduce air pollution, reduce the amount of waste treatment, recycle, reduce the overall packaging cost and so on,
Cling film some manufacturers use PVC, a plasticizer that can leach from plastic wrap into high-fat food packages at room temperature, causing greater harm to the human endocrine system.
The above is the difference between stretch film and cling film, contact us for more product details, and more exciting activities are waiting for you.
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