Film blowing machine the new type of film blowing machine produced by the mechanical manufacturing industry has sheet film blowing machine, PE foam film blowing machine, multi-layer composite film blowing machine, color strip film blowing machine, hot shrink film blowing machine and so on, which can meet the requirements of various products in the market packaging, high-end film blowing quality has won the favor of high-grade commodity packaging.
In the future, with the deepening of science and technology, film blowing machine after continuous upgrading, will play a more role, to promote the plastic and packaging industry to the high-end.
Composite flexible packaging widely used film blowing machine in the field of food packaging prominent position
A film blowing machine with good performance shows good market adaptability in the process of producing film, improves production efficiency, provides convenience for people and promotes harmonious development of society. Food packaging is the most widely used field of film, plastic film blowing machine blown out of the high-grade film can be used as commodity packaging publicity, improve the commercial value.
Film blowing machine blowing a special film, the use of advanced technology to make fruits and vegetables durable. In order to meet the needs of social products and environmental protection, yingkou pengda plastic film blowing machine will continue to introduce advanced technology, adjust the industrial model, and promote the plastics industry to the high-end.
At present, the development of plastic film blowing machine high-end technology, film blowing can also be used as a number of food preservation technology, take the road of new film blowing machinery manufacturing. Film blowing machine blowing a special film, the use of advanced technology to make fruits and vegetables durable. In order to meet the needs of social products and environmental protection needs, plastic film blowing machine will continue to introduce advanced technology, adjust the industrial model, promote the plastic industry to the high-end.
Plastic film blowing machine machinery manufacturing industry produced by the new film blowing machine has sheet film blowing machine, PE foam film blowing machine, multi-layer composite film blowing machine, color strip film blowing machine, thermal shrinkage film blowing machine and so on, to meet the market all kinds of products packaging, high-end film blowing quality has won the favor of high-grade commodity packaging.
With the deepening of science and technology, film blowing machine after continuous upgrading, will play a more role, to promote the plastic and packaging industry to the high-end.
Experts pointed out that composite materials are two or more than two kinds of materials, after one or more composite process and combined together, thus constitute a certain function of composite materials. Generally, it can be divided into base layer, functional layer and heat sealing layer. Base mainly plays the role of aesthetics, printing, moisture resistance and so on. Such as BOPP, BOPET, BOPA, MT, KOP, KPET, etc.; Function layer is mainly used for blocking and avoiding light, such as VMPET, AL, EVOH, PVDC, etc. The thermal sealing layer is in direct contact with the package, and has the functions of adaptability, permeability resistance, good thermal sealing, as well as transparency and opening day, such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA, e-maa, EMA and EBA.
1, LDPE, LLDPE resin and film
China's composite film started from the late 1970s, from the early to the middle of the 1980s, China began to introduce some extruders, film blowing machines and printing presses, the production of simple two-layer or laminated composite materials. Such as extrusion compound BOPP/PE, paper/PE, pp/PE; Dry composite BOPP/PE, PET/PE, BOPP/AL/PE, PET/AL/PE, etc. In LDPE resin and film, LLDPE is often mixed with a certain proportion to enhance its strength and stiffness. Mainly used in instant noodles, biscuits, mustard and other food packaging. General coating grade LDPE resin; IC7A, L420, 19N430, 7500, etc. Blown film grade LDPE resin: Q200, Q281, f210-6, 0274, etc. LLDPE resin: 218w, 218F, FD21H and so on.
2, CPP film, CPE film
In the late eighty s to the early ninety s, as a new generation of the introduction of flexible packaging equipment and stretch film, packaging inclusions to further expand the scope of, some of the transparency of puffed food, cereals and other packaging requirements higher, and boil, high-temperature sterilization products and the introduction of successive also increase accordingly to the requirement of packaging material, lining material is given priority to with LDPE and LLDPE can not meet the requirements of the above products. It has good heat sealing property. CPP is widely used in packaging for its oil resistance, transparency, fragrance retention and special low moisture heat sealing and high temperature cooking properties. Based on this development of aluminum CPP, because of its metallic luster, beautiful, barrier performance is also quickly and widely used. CPE film produced by flow casting method is also being used because of its one-way tearing, low temperature heat sealing and good transparency.
3. MLLDPE resin
With the development and change of packaging market, there are more and more special requirements for packaging. DOW, an American chemical company, has produced metallocene polyethylene MLLDPE by metallocene catalysis polymerization. Such as APFINITY, POP1880, 1881, 1840, 1450 and other resin. Exxon of America, mitsui of Japan and phillips of America also produced MLLDPE. For example, exxon's ex-ceed 350d60, 350D65, mitsui petrochemical's e-volvesp0540, SP2520, Philip's MPACTD143, D139, etc. Since MLLDPE has good blending and workability with LDPE and LLDPE, it can be mixed in blowing film or casting, and the mixing ratio can be from 20% to 70%. This kind of membrane has good tensile strength, impact resistance, good transparency, good low temperature heat sealing and anti-pollution, and its inner composite material is widely used in frozen and refrigerated food, shampoo, oil, vinegar, soy sauce, detergent and so on. Can solve the above products in the process of packaging production, transportation, packaging speed, broken bag, bag leakage, penetration, etc.
4. Cover film inner layer material
Jelly, fruit juice, yogurt, fruit milk, soup and other liquid packaging cups, bottles, the main materials are HDPE, PP, PS and so on. The cover film of this packing, want to consider to keep qualitative deadline already, want to consider the heat sealing intensity between cover film and cup again, consider consumer to use even convenient -- easy tear sex. To achieve this particularity, the inner layer material can only form the interfacial bonding strength with the cup day, but cannot completely penetrate, fuse together. Generally, modified EVA resin is used. For example, American dupont APPEEL53007. TOPCOL-3388 in toyang, Japan, LOTRYL20MA08 in France, WT231 in HIRO.DINE, Japan, etc. Its structure can be: PET/PE/HM, BOPA/PE/HM, PET/VMPET/PE/HM, PET/AL/PE/HM, paper/PE/AL/PE/HM. As for the requirement that the cover film and the bottom cup cover should be firm and unripped, the material of the bottom cup is generally required to be consistent with the inner material of the cover film, so that the two materials can be completely fused when they are sealed by heat. For example, HDPE cup, its cover film inner layer material: LDPE or EAA; PP cup, the inner layer of its cover membrane is CPP membrane; PET bottle. We have found a kind of PET film modified by coating as heat sealing layer to seal pesticide PET bottle with satisfactory results.
5. Co-extrusion membrane
The film made of single-layer LDPE or LDPE mixed with other resins has a single performance, which cannot meet the packaging requirements of the development of modern goods. Therefore, the co-extrusion film made by co-extrusion blowing film or co-extrusion casting equipment can improve its comprehensive performance. Such as film mechanical strength, heat sealing performance, heat sealing temperature, barrier, open, anti pollution comprehensive performance, and its processing cost and reduce, has been widely used. Such as H layer co-extrusion blown film hot melt film: PE/HM, cable film PE/EAA, MLLDPE low temperature heat sealing film, EVA cover film and anti-static film, smooth film. H layer co-extrusion film: PE/HM, cable film PE/EAA, low-temperature heat sealing film of MLLDPE, cover film of EVA, anti-static film and smooth film. Co-extruded CPP, non-modified PP/heat-sealable PP of h-layer co-extrusion ducting, etc. Three-layer, five-layer structure of nylon co-extrusion film, five layers, seven layers of EVOH, PVDC high barrier film is also developing and widely used. The development of the inner film of composite soft packaging materials, from LDPE, LLDPE, CPP, MLLDPE, to the current co-extrusion film, largely realizes the packaging function, personalized, to meet the packaging inclusion quality, processing performance, transportation, storage conditions. With the continuous introduction of new materials and the improvement of inner film production technology and equipment, the inner film of composite flexible packaging materials will surely get rapid development and promote food.
6, other
With the progress of the society, the demand of human beings is growing, all kinds of functional and environmentally friendly packaging film is emerging. For example, water-soluble polyvinyl alcohol film, which is environmentally safe, thoroughly degraded and has good heat sealing performance, is being developed as an inner film in addition to being a single-layer packaging material.
At present, the film blowing machine development of high-end technology, film blowing can also be used as a number of food preservation and other application technology, take the new film blowing machinery manufacturing road. Film blowing machine blowing a special film, the use of advanced technology to make fruits and vegetables durable. In order to meet the needs of social products and environmental protection needs, plastic film blowing machine will continue to introduce advanced technology, adjust the industrial model, promote the plastic industry to the high-end.
Nan 'an ruixing electromechanical equipment co., LTD., founded in 1995, is a modern enterprise integrating scientific research and manufacturing. The company is engaged in precision CNC plastic machinery manufacturing, in the same industry in the advanced level, 80% of the products are exported to South Africa and southeast Asian countries, product quality through the ISO9001 certification, and the national Patent Office for several patents.
