What do you know about heat shrinkable film?
PE shrinkable film
PE polyethylene, it is transparent thermoplastic.PE commonly used there are three categories, namely :LDPE HDPE LLDPE three kinds of polyethylene monomer is the same, but in the synthesis of these polyethylene, the process conditions used are not the same, therefore, to generate three different varieties of polyethylene, three kinds of material performance has a great difference.
PE film is a kind of material with good toughness and is not easy to use with ordinary plastic shredders.Because PE film is soft and tough, it is not easy to chop, not to mention the high temperature of the tool at high speed, will make LDPE melting adhesion on the blade.PE granulation can be directly put into strips into the feeding mouth of the extruder, and the PE film can be dragged into the barrel by the shear force of the screw.PE recycled primary material, still can blow film, used in non-food and pharmaceutical packaging, but also widely used in Oxford leather and tarpaulin production, promising.
Heat shrinkable film
PE heat shrink film is widely used in wine, cans, mineral water, all kinds of drinks, cloth and other products of the whole set packaging, the product is good flexibility, impact resistance, tear resistance, not easy to damage, not afraid of moisture, shrinkage rate.
PVC shrinkage film, plus ingredients to enhance its heat resistance, toughness, ductility and so on.The top layer of this surface film is lacquer, the main component in the middle is PVC, and the bottom layer is backed with adhesive.It is a kind of synthetic material which is popular and widely used in today's world.PVC is the most suitable material for producing 3d surface film.
Due to the unique performance of PVC (rain proof, fire-resistant, anti-static, easy to shape) and the characteristics of low input and high yield of PVC, is widely used in building materials industry and packaging industry, therefore, PVC film has high transparency, good gloss, high shrinkage characteristics.
New Wrapsmart pre-stretched wrap film
"Wrapsmart" pre-stretch winding film is a new generation of green environmental protection manual pre-stretch winding film recently developed abroad.The product adopts a new pre-stretching process to make the original film lighter and thinner, while its physical tensile strength and entanglement force remain basically unchanged.And no special packaging equipment, suitable for manual packaging, save time, labor and money!
This new generation of green wrapped film products with thickness of 0.007mm (7μm) can achieve the stability and protection performance of 18~20μm traditional film packaging.The product is a new technology product in China, compared with the traditional winding film, packaging the same goods, less consumption, low cost!
Pre-stretched winding film has advantages over traditional winding film
Cheap, fine, environmental protection, easy to use
Under the same weight, the actual packing area of ultra-thin winding film is about 3 times that of traditional winding film on the market.Compared with the traditional winding film, the cost saving is considerable.Moreover, our green winding film is a high strength pre-stretched single-sided sticky winding film, which is quite convenient to use and saves energy and money.The outer surface of the packaging is not easy to stick dust, clean and hygienic.
POF shrink film
POF has the characteristics of high gloss, good toughness, high tear strength, uniform thermal shrinkage and is suitable for automatic high-speed packaging. It is the replacement of traditional PVC thermal shrinkage film.POF means thermal shrinkage film. POF stands for multi-layer co-extruded polyolefin thermal shrinkage film. It is made of linear low-density polyethylene as the middle layer (LLDPE) and co-polypropylene (PP) as the inner and outer layers through three extruders, and then processed by special processes such as mold head forming and membrane bubble blowing.
OPS shrinkable film
OPS (thermal shrinkage film) is a new type of fitting packaging material that meets the requirements of environmental protection. OPS thermal shrinkage film has high strength, large rigidity, stable shape, and good glossiness and transparency.Convenient processing, easy coloring, good printing performance, high printing resolution, for the pursuit of exquisite printing trademark, is a material progress.Because of the high shrinkage and OPS film strength, can with different shapes of container tightly, so it can not only print out the fine design, also can meet all kinds of different shape of the use of novel packaging container, non-toxic tasteless, resistant to oil, up to the standard of food hygiene film allows designers to use the color with striking,Realize 360° label design, give full play to creativity and imagination, so that drinks and other goods in the label use more vivid pattern, highlight the image on the shelf, produce an unexpected container effect.
OPS is a new type of SMT printing packaging material that meets international environmental requirements.
Heat shrink film according to the international standard carefully made small heat shrink packaging equipment, has the advantages of simple operation, wide application range, good sealing, high transparency, low cost, high grade, suitable for small and medium-sized batch products packaging.Heat shrinkable film machine and label machine online use, form label shrinkable machine line, widely used in medicine, food, drinks, cultural articles, ceramics, daily chemicals, auto parts, knitting, electronic audio and video products fully closed heat shrinkable packaging, is the packaging line after the label shrinkable machinery.
PET shrinkable film
PET heat-shrinkable film is a new heat-shrinkable packaging material.Because it is easy to recycle, non-toxic, tasteless, good mechanical properties, especially in line with the characteristics of environmental protection, in developed countries polyester (PET) has become an ideal substitute for polyvinyl chloride (PVC) thermal shrinkage film.
However, ordinary polyester is a crystalline polymer, ordinary PET film after special process can only get 30% of the thermal shrinkage rate.In order to obtain polyester film with higher thermal shrinkage, modification is also necessary.In other words, in order to prepare polyester film with high thermal shrinkage, it is necessary to copolymerize common polyester, namely polyethylene terephthalate.The highest thermal shrinkage of PET film after copolymerization can reach more than 70%.
Thermal shrinkage polyester film characteristics: it is stable at room temperature, heating (above the glass temperature) shrinkage, and is in one direction of more than 70% of the thermal shrinkage.The advantages of shrinkable polyester film packaging are:
Shrinkable polyester film is often used in convenience food, beverage market, electronic appliances, metal products, especially shrinkable label is its main application field.Because with the rapid development of PET beverage bottles, such as Coke, Sprite, all kinds of fruit juice and other beverage bottles need PET heat shrink film with it to do heat sealing label, they belong to polyester class, is environmentally friendly materials, easy to recycle and reuse.Heat shrinkable polyester film is used for shrinkable label, also began to be used in the outer packaging of daily goods.Because it can not only protect the packaging goods to avoid impact, rain, moisture, rust, but also make the product with exquisite printing packaging to win users, at the same time, it can well show the good image of the manufacturer.More and more packaging manufacturers are using printed shrink film to replace the traditional transparent film.Because printing shrinkage film can improve the appearance of the product grade, is conducive to product advertising, can make the trademark brand in the hearts of consumers have a deep impression.
General properties of PET heat shrinkable film
Unitization: This is one of the biggest characteristics of shrink film packaging.With the help of the film's super winding force and retraction, the product is tightly and fixedly bundled into a unit, so that the scattered small parts become a whole, even in adverse circumstances, the product is not loose and separated, and there is no sharp edge and viscosity, so as to avoid damage.
Primary protection: primary protection provides the surface protection of the product, forming a very light and protective appearance around the product, so as to achieve the purpose of dustproof, oil-proof, moisture-proof, water-proof and anti-theft.It is particularly important to wrap the film packaging to make the packaged goods uniform force, avoid uneven force to damage the goods, which is the traditional packaging (strapping, packaging, tape and other packaging) can not do.
Compression fixity: With winding membrane retraction after tensile force will wrap packaging products, forming a compact unit, does not occupy a space, make the product each pallet tightly wrapped together, can effectively prevent the transport products in the process of mutual dislocation and mobile, at the same time, can adjust tensile force can make the hard products close to make soft products,Especially in the tobacco industry and textile industry has a unique packaging effect.
Cost saving: wrapping products with wrapped film can effectively reduce the cost of use. Wrapping film is only about 15% of the original box packaging, 35% of the heat shrinkable film and 50% of the carton packaging.At the same time can reduce the labor intensity of workers, improve packaging efficiency and packaging grade.
Article classification: Industry Dynamics