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application and development of cpp thin film

source: time,time:2015-09-18 14:45:57

cpp film is produced by casting plastic industry in the extrusion process of polypropylene (pp) film. this kind of films and bopp (bopp) thin films with different, non oriented films.
cpp film is produced by casting plastic industry in the extrusion process of polypropylene (pp) film. this kind of films and bopp (bopp) thin films with different, non oriented films. cpp film has good transparency, high gloss, good stiffness, good moisture resistance, good heat resistance, easy heat sealing etc.. cpp film after printing, bag making, applies to clothing, knitwear and flower packaging bags, food packaging film and photo files, and metallized film for barrier packaging and decoration. in addition, packaging, food packaging in candy (twisted film), drug packaging (shu yedai), adhesive tape, card holder, and other aspects of the growing demand for circular folder.
cpp thin films with excellent heat resistance. because the pp softening point of about 140 deg c, the film used for hot filling, cooking bags, aseptic packaging etc.. with acid and alkali resistance, oil resistance and excellent performance, make it become the preferred material field of bread product packaging or laminated material. the contact with food safety, demonstrating excellent performance, will not affect the flavor of the food packing, and can choose different grades of resin to obtain the desired characteristics.
cpp film in china started in 1980s, the beginning of single-layer cast equipment imported from abroad, width of only 1m ~ 1.5m, the annual production capacity of about 1000 tons to 1500 tons / taiwan / taiwan. enter 90 age, from austria, japan, germany mitsubishi heavy lenzing co, reifenhauser, colines, dolci, wh italy america battenfeld introduced the multi-layer co extruded cast film production line, the width of 2m ~ 2.5m, the annual production capacity of 3000 tons to 4000 tons / taiwan / taiwan. since 2000 is the introduction of more make a spurt of progress, advanced production line, mainly to the width of 4m ~ 4.5m, the annual production capacity of 5000 tons to 6000 tons / taiwan / taiwan multi-layer co extruded film production line. the foshan plastics group limited by share ltd introduced usa david standard production line of 5.4m, the annual production capacity of 11000 tons. at the same time, also obtained the fast development of domestic equipment. according to incomplete statistics, by the end of 2006 china's cpp film production line of the introduction of more than 77, more than 390000 tons of capacity; more than 150 domestic lines, production capacity of more than 260000 tons, the total production capacity of more than 650000 tons. according to the survey, in 2006 the national demand for cpp film is close to 400000 tons, 500000 tons of demand in 2008.
 
we are greater than the supply and demand of serious, competitive market environment, each enterprise needs more to the good state of mind, know yourself as well as the enemy to choose the correct competition strategy, in the struggle with a variety of competitive forces, some cpp companies have explored three winning strategies: overall cost leadership strategy, product differentiation strategy and product specialization strategy. the author thinks that, with a number of production line of large enterprises or research and development ability of the small enterprises may adopt the product differentiation strategy. the difference of cpp film product and its development direction of simple explanation.
 
1 composite film uses: according to sealing temperature (condition is 0.18mpa, 1s, 1n / 15mm) can be divided into: ordinary composite membrane (<140 c), low temperature heat sealing composite membrane (<115 c), ultra-low temperature heat sealing composite membrane (<100 c). with bopp or bopet membranes after printing composite bopp / cpp (bopet / cpp) two film, used for clothing, dry food, puffed food packaging. its development direction is: (1) high transparency, good performance, high slip opening (after curing cof<0.2), heat sealing temperature is low in order to adapt to the high-speed bag and packing requirements; (2) keep wet film surface tension of 6 months up to 38 dyne, to prolong the shelf life of the product.
the 2 film substrate use: with its low cost, the aluminum products with shading, decoration, the barrier properties of the unique excellent performance, and has good adaptability in printing, composite and other processing, can meet the heat resistance, chemical resistance, abrasion resistance, anti oxygen requirements, such as the use of high barrier, widely used food packaging decoration and other fields. its development direction is: (1) improve the stiffness of aluminum to improve product quality; (2) after plating aluminum layer adhesion of 2n / 15mm, to meet the needs of large packaging; (3) improve
high temperature performance of the aluminum layer after plating, to 300 deg c extrusion needs (currently only reach 240 degrees celsius), improve the peeling strength of 1n / 15mm; (4) reduce the heat sealing temperature, less than 110 deg c under the condition of heat sealing strength more than 1n / 15mm, in order to adapt to requirements of high-speed automatic packing; (5) improve the opening and smoothness to high-speed bag and packing requirements, because can not add smoothing agent, the product of cof is about 0.75; (6) how to keep the surface of the aluminum layer wetting tension for 6 months up to 38 dyne, to prolong the shelf life of the product is a problem; (7) with the large-scale aluminum plating machine, ultra long and wide aluminum substrate become the inevitable direction of development, such as the wide 2500mm, long 24000mm products of some enterprises have normal production. 3 cooking film uses: according to temperature can be divided into: ordinary cooking film (105 to 115 deg c, 20min ~ 30min), the membrane in the cooking temperature (about 121 deg c, 30min ~ 40min), high temperature cooking film (135 deg c, 30min); and barrier films such as pet, pa, aluminum foil, etc. the compound, used for packing need high temperature cooking disinfection products, such as meat, juice, agricultural products and medical products etc.. the performance index of cpp cooking film is important for heat sealing strength, impact strength, composite strength, especially after cooking the above indexes. another film, no smell or smell is very low with the direction of development, such as the smell of chestnut bag of cpp film is very strict.
4 audio and video products, film album application: cpp thin film with its low cost, environmental protection, transparency, heat sealing, tear resistant properties are widely used in audio and video products packaging and album, folder, business card holder etc.. gao touming, high gloss and wear is the development direction.
5 use: cpp tissue membrane membrane because of its stiffness, abrasion resistant, transparent and printing performance is better than that of pe film for high speed printing and packaging requirements, widely used in sanitary napkin bag, a bag, bag, paper and paper products such as automatic packaging. to improve the stiffness, improve wear resistance reducing thickness and surface tension is the direction of its development.
table 6 india single food packaging film uses: mainly used in a variety of small packages of bread, biscuits and other food; high stiffness, gao touming, smooth, wear-resistant, high surface tension and wetting to high-speed automatic packing is the development direction.
7: use adhesive film according to the demand of film production, transparent white, paper or other color, mainly used for label products, or aviation signs, labels and other baby diapers; high stiffness, high surface tension, wetting easy cutting is the direction of its development.
 
8 twisted film uses: cpp film because of its density than pvc, pet, ps and glass paper is much smaller, less investment in equipment, the unit area of low cost; can be printed on the surface, aluminum, can also direct heat sealing, and environmental health, is an ideal material for candy, chocolate, beef dry packing kink. kink, stiffness, improve transparency and gloss is the development direction.
9 protective film: use due to its low cost, transparent, high stiffness and other advantages, protective film, bopp film is used as a partial replacement of pet advertising, lengbiao film products.
the 10 film uses: cpp film breathable moisture barrier performance is superior, the amount of oxygen through 2000cm3 / m2.d.bar, modified by the antimoisture property reached 5000cm3 / m2.d.bar ~ 6000cm3 / m2.d.bar, and the sealing performance, the use of single ideal packaging material as a vegetable, fruit and all kinds of edible fungi of the class. according to the contents of the package, 02 / c02 permeability and antibacterial is the development direction.
11 non transparent microporous breathable film: use the porgenic appropriate additives in cpp film production, and stretching at a certain temperature, the cpp thin film becomes breathable film with certain pore size. at present, films with different permeability has been widely used in medical and health care film (such as sanitary napkins, sterile protective clothing, microporous filter film and film) artificial paper etc..
12 anti-static film uses: cpp antistatic film can be divided into moisture type antistatic film and permanent antistatic film, the surface resistivity reaches 108 to 1010 omega, can be applied to a variety of electronic components packaging. the electronic information industry in china with annual sales of 2.4 yuan, need all kinds of anti-static film, this is a broad market. the surface resistivity reaches 1010 to 1012 omega, suitable for high speed automatic powder packaging requirements.
 
13 anti fog film use: for fresh fruits, vegetables, salad, mushroom and other packaging, refrigeration clearly see the contents, and prevent food spoilage rot. cpp thin requires good antifogging effect (cold and hot state anti fog), high heat sealing strength and soft good, no odor or low odor is the development direction.
14 film: cpp film by use of printing, bag can be used for packaging, flowers etc. according to the needs, adjust the film transparency, antistatic and friction coefficient of performance such as customer specified
15 medical film applications: for production line was installed in the asepsis room to prevent the product from any form of pollution, and does not contain harmful substances such as migration and health performance. after bopp, pet, al and bopa composite as tablets or powder medicine packaging; and high barrier materials such as evoh coextrusion infusion bags, blood bags and other production.
16 pesticide use: modified by coating the use of special materials, the solvent resistance, heat sealing strength and impact strength of cpp film is greatly improved, applied to ec pesticide packaging, flexible packaging structure usually is cpp / al / bopet and cpp / pet / al bopet.
17 high barrier film use: use has favorable water resisting property of pp and the extensive use of high barrier film having oxygen barrier properties of pa, evoh and other materials for the production of coextrusion in meat products, frozen cooked meat food packaging; its good oil resistant, resistance to organic solvents, can be widely used in edible oil, convenient food, dairy products, hardware products, rust proof packaging; its good water resisting moisture resistance, can be used for wine, soy sauce and other liquid packaging.
18 and the pe film cpp film modified by application: production can be directly used by ldpe and other thin film materials can not only ensure the extrusion, extrusion composite fastness, but also reduces the cost of composite.
19 high transparent flexible film uses: by using extrusion and blending technology, so that the cpp film has the properties of high transparent, high impact, is extremely soft, puncture resistance and low temperature resistance and excellent performance, mainly used for cooking after frozen storage of food packaging, also used in high grade clothing, t-shirts and underwear etc. packaging, can also be used for other packaging.
easy to use: 20 line tear film by cpp film modified pp and special production line production process are easy to tear properties, and other composite materials made of various linear easily torn bags, convenient consumer.
21 easy to use: stripping film due to the cpp film usually has high heat sealing strength, it is not easy to heat sealed packaging bag is opened, the general need to play in the bag edge gap can open the package. the modified production strippable cpp film on the heat sealing layer of pp, and bopp, bopet, bopa, aluminum foil packaging materials can be easily stripped into a composite heat sealed packaging, can be opened directly from the heat sealing, greatly convenient for consumers to use, at present, on the cover of jelly milk products have been widely used.
22 sub gloss film uses: cpp matt film surface gloss is less than or equal to 10%, with the surface of the optical effect of frosted glass like after printing, color saturation, comfortable, elegant appearance, can be used for heat sealing, can also be used for composite, suitable for packaging senior guard
paper towel and food.
23 biodegradable film uses: add cpp degradation film made of pp in the production of biodegradable masterbatch, under natural conditions buried about 7 ~ 12 months basically can be degraded into inorganic substances absorbed by soil. at present, some european companies have been successfully developed this kind of masterbatch, individual domestic film factory test.
in conclusion, although the cpp film variety, wide applications, but the cpp film on the pp film in the proportion of small, but with the performance of equipment to improve the quality of pp resin, the improvement and the processing ability, the performance of cpp and bopp films on gradually narrows the gap between. due to the sub packaging development, packaging, personal pouch, convenience and preservation of the direction of development, is conducive to the development and application of cpp membrane was more widely.
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