Heat-shrinkable Polyester PET PE Heat Shrink Film Manufacturing Exporters

I. Definition of heat shrink film

Heat shrink film is used for the sale and transport of various products, and its main function is to stabilize, cover and protect the products. Shrink film must have high puncture resistance, good shrinkage, and certain shrinkage stress. During the shrinkage process, the film must not produce holes. Since shrink film is often applied outdoors, it is necessary to add a UV anti-ultraviolet agent.

Second, the classification of heat shrink film

1, PE shrink film

PE polyethylene is a transparent thermoplastic, due to the PE film is soft and tough, not easy to crush with an ordinary plastic shredder, not to mention the high temperature of the knife at high speeds, will make the LDPE melt and adhering to the knife blade.PE pelletizing can be done directly into the strip into the extruder charging port, relying on the shear force of the screw to drag the PE film into the barrel of the barrel-heated melting and extrusion pellet.PE recycling of the first-grade material can still be blown film, used for non-food PE recycled primary material can still be blown film, used for non-food and pharmaceutical packaging, and also widely used in the production of Oxford leather and tarpaulin.

PE heat shrink film is widely used in wine, cans, mineral water, a variety of beverages, cloth, and other products, the whole collection of packaging, the product is flexible, impact resistant, tear resistant, not easy to break, and not afraid of moisture, or shrinkage rate.

2、POF shrink film

POF surface gloss, good toughness, tear strength, heat shrinkage uniformity, and suitable for automatic high-speed packaging characteristics, are the traditional PE heat shrinkable film replacement products. POF is the meaning of heat shrinkable film, POF is known as multilayer co-extruded polyolefin heat shrinkable film, it is the linear low-density polyethylene as an intermediate layer (LLDPE), a total of polypropylene (pp) as the inner and outer layers, through the three Extruder plasticization and extrusion, and then through the die head forming, film bubble blowing and other special processes.

3、OPS shrink film

OPS is a new type of body packaging material, OPS shrink film has high strength, rigidity, shape stability, and a good gloss. Convenient processing, ease of color, good printing performance, there is high printing resolution, for the constant pursuit of beautifully printed trademarks, is entirely material progress.

Due to this high shrinkage and strength of OPS film, it can tightly adhere to a variety of different shapes of containers, so it not only prints beautiful patterns but also meets the use of a variety of novel packaging containers with very different shapes. This non-toxic, tasteless, grease-resistant, and food hygiene standards-compliant film allows the designer to use eye-catching colors to achieve a 360 ° label design, giving full play to creativity and Imagination, so that beverages and other goods in the use of the label pattern more vivid, highlighting the image on the shelf, resulting in an unexpected container effect.

OPS has the following advantages:

(1) OPS can achieve about 74% lateral shrinkage, while the shrinkage process is not easy to wrinkle. In the non-high-temperature environment can complete the contraction, so that the heat-shrinkable labels can stick body packaging in the container outside. After the shrinkage in the transverse direction of the label is completed, the longitudinal direction will hardly be shortened due to the longitudinal shrinkage of the label height.

(2) OPS almost does not occur crystal point, because OPS resin in the raw material refining process is different from the PVC resin, so it can greatly reduce the crystal point and the existence of foreign matter.

(3) OPS specific gravity is only 1.05, for the same thickness of the same area of OPS, PVC, and PET three materials, OPS can reduce the weight by 25%.

(4) the OPS label made after contraction of the tear line is very well-proportioned, and easy to tear without destroying the overall effect of the label.

4、PET shrink film

PET shrink film is a new type of heat shrink packaging material. Because it is easy to recycle, non-toxic, odorless, has good mechanical properties, etc., in developed countries polyester (PET) has become an ideal alternative to replace polyvinyl chloride (PVC) heat-shrinkable film.

However, ordinary polyester is knot shrinkage of polyester film, which must also be modified. After copolymerization of modified PET film, its highest heat shrinkage rate can be as high as 70% or more.

Characteristics of the heat-shrinkable polyester film: it is stable at room temperature, shrinks when heated (above the glass transition temperature), and is in a direction where more than 70% heat shrinkage occurs.

①Transparent to the body, reflecting the image of the goods.

②Tightly bound packages, good anti-scattering.

③Rainproof, moisture-proof, mold-proof.

④No recovery has a certain anti-counterfeiting function.

Heat-shrinkable polyester film is commonly used in convenience food, beverage market, electronic and electrical appliances, and metal products, especially shrink labels are its main application areas. Because of the rapid development of PET beverage bottles, such as Coke, and Sprite, a variety of fruit juices and other beverage bottles need PET heat-shrinkable film with which to do heat-sealable labels, which belong to the same class of polyester, and are easy to be recycled and regenerated.

Heat-shrinkable polyester film in addition to shrink labels, also began to be used for daily commodities on the outer packaging. Because it can not only protect the packaging items to avoid impact, rain, moisture, and rust but also make the product with beautifully printed packaging to win the user, while it can be a good display of the manufacturer's good image. More and more packaging manufacturers use printed shrink film to replace the traditional transparent film. Because the printed shrink film can improve the appearance of the product grade, conducive to product advertising, and can make the trademark brand in the minds of consumers to produce a deep impression.

Third, the characteristics of heat shrink film

1, with high flexibility, not easy to break, strong resistance to bursting, strong impact resistance, tear resistance, and strong tensile strength, can replace the box packaging.

2, shrinkage rate, heat shrinkage can wrap the items, if made of PE straight through the bag (bags open at both ends) by heat shrinkage, the open ends can be lifted items, can withstand the weight of 15KG, easy to carry.

3, good transparency, the light transmission rate of 80%, can show the product, can be invisible publicity products, but also reduces the distribution errors in the material flow.

4, moisture-proof, waterproof, and dust-proof, both to achieve the packaging effect, but also beautiful products, and product protection.

Fourth, the application of heat shrink film

Heat shrink film is widely used in food, pharmaceuticals, disinfection tableware, sporting goods, arts and crafts, printed matter, hardware and plastic products, telephones, electronic appliances, and so on the packaging of a variety of products, especially in the irregularly shaped items or commodities of the combination of (cluster) packaging, not only to meet the commodity moisture-proof and dust-proof, preventing the touch of the steal, transparent display, and other functions, but also increase the attractiveness of the product's appearance, but also for the replacement of various types of cartons, not only to save the packaging effect but also beautiful products, protection of products. Instead of various types of cartons, not only save packaging costs but is also in line with the packaging trend. Shrink film (bags) can be processed into flat bags, arc-shaped bags, trapezoidal bags, three-dimensional bags, and other shaped bags.