According to insiders, in the world packaging material market, the production of cast film is rising continuously, and the cast film industry is entering a new round of investment boom. China's tape casting film production started in the 1980s. With the continuous development and growth in the past 20 years, it has become a sunrise industry with considerable production capacity and production level in the packaging industry.
Polypropylene cam khwb cia zaj duab xis (CPP) yog ib tug uas tsis yog tensile thiab tsis directional ca extruded zaj duab xis uas ua los ntawm yaj cam khwb cia quenching. Piv nrog rau zaj duab xis tshuab, nws yog characterized los ntawm ceev ceev ceev, siab tso zis, zoo transparency, gloss, thickness uniformity thiab zoo heev tshuav nyiaj li cas ntawm anisotropic zog. Nyob rau tib lub sijhawm, vim tias nws yog cov yeeb yaj kiab extruded tiaj tus, cov txheej txheem tom ntej xws li luam ntawv thiab kev sib xyaw yog yooj yim heev, yog li nws tau siv dav hauv kev ntim khoom ntawm textiles, paj, zaub mov thiab khoom siv niaj hnub.
Pob.
CPP tuaj yeem ua tau ob txoj hauv kev: ib qho - txheej daim kab xev casting thiab ntau - txheej coextrusion daim kab xev casting. Ib qho - txheej zaj duab xis feem ntau xav tau qhov zoo qis- qhov kub thiab txias sealing kev ua tau zoo thiab yoog raws. Multilayer coextrusion casting zaj duab xis feem ntau tuaj yeem muab faib ua peb txheej: txheej txheej thaum tshav kub kub, txheej txheej thiab corona txheej. Kev xaiv cov ntaub ntawv yog dav dua li ntawm ib - txheej zaj duab xis. Cov ntaub ntawv uas ua tau raws li qhov yuav tsum tau ua ntawm txhua txheej tuaj yeem xaiv nyias los ua kom cov yeeb yaj kiab nrog cov haujlwm sib txawv thiab siv. Ntawm lawv, lub tshav kub sealing txheej pawg yuav tsum raug rau cov cua sov sealing ua, uas yuav tsum tau tsawg melting point, zoo tshav kub fusibility, dav kub sealing kub thiab yooj yim sealing; Cov txheej txheem txhawb nqa zaj duab xis thiab ua rau kom muaj zog ntawm zaj duab xis; Lub corona txheej yuav tsum tau luam tawm los yog metallized, nrog rau qhov tsim nyog qhov nro, thiab ntxiv cov additives yuav tsum nruj me ntsis txwv.
Tom qab luam ntawv thiab lub hnab ntim khoom, CPP tuaj yeem siv nyias nyias rau cov ntim khoom noj, khaub ncaws, ntaub so ntswg, paj, thiab lwm yam. Tsis tas li ntawd, vim nws qhov zoo tshaj plaws pob tshab thiab tsis tshua muaj kub sealing kub, nws kuj tseem siv tau los ua cov yeeb yaj kiab hauv qab. ntawm ntau cov yeeb yaj kiab sib xyaw, xws li kev sib xyaw nrog PET zaj duab xis thiab BOPP zaj duab xis, thiab siv rau ntim cov khoom noj ceev ceev, tshuaj yej, thiab lwm yam; Nws yog compounded nrog barrier resin EVOH, PA, PVDC, thiab lwm yam los ntawm cov nplaum rau pob khoom noj uas muaj roj los yog kua zaub. Nws tseem yog ib qho tseem ceeb daim ntawv thov teb ntawm txhuas zaj duab xis nyob rau hauv high kub thiab nqus tsev noj mov.
With the increasing market demand, the products and materials of casting film are also updated day by day. CPP's new product development mainly focuses on ultra-low temperature heat sealing film, cold resistant film, high temperature cooking film, etc. Some special-purpose films are also being developed and applied, such as antistatic film, pesticide film, high transparent and super flexible film, which are gradually introduced to the market and occupy new application fields. With the development of CPP production scale and extrusion equipment, the use and optional range of raw materials are increasing, which makes the polypropylene special material for tape casting develop in the direction of more refinement, specialization and higher performance. Various special materials with more refined division of labor continue to emerge. Each material plays its own role at different levels, endowing the film with new properties to meet different market needs. At the same time, the special production of high-performance raw materials according to the special requirements of users is also emerging, which will bring greater profits to resin producers. At present, the development hotspot of special materials is low-temperature heat sealing materials. The industrial production of butene / propylene random copolymer is a newly launched product in the market. Compared with the conventional B / C random copolymer, when the heat sealing temperature is the same as 100 112 degree , the heat sealing strength of this product is much higher, and there is less frost and fog.
Nyob rau hauv xyoo tas los no, nrog kev txhawb nqa ntawm cov neeg siv khoom lag luam, daim ntawv thov kev lag luam ntawm CPP tau nthuav dav, thiab nws txoj kev loj hlob tau nrawm dua. Txog tam sim no, muaj ntau tshaj 30 CPP tuam ntxhab thiab ntau tshaj 40 cov kab ntau lawm hauv Suav teb, nrog rau tag nrho cov peev txheej ntawm 150000 170000 tons / xyoo. Txawm li cas los xij, kev cia siab ntawm cov ntaub ntawv tshwj xeeb rau casting zaj duab xis ntawm cov khoom siv txawv teb chaws yog qhov hnyav dua li BOPP zaj duab xis thiab tshuab tshuab. Tam sim no, cov khoom lag luam txhua xyoo suav nrog kwv yees li 60 feem pua ntawm tag nrho cov kev siv. Ntau yam ntawm CPP cov ntaub ntawv tshwj xeeb hauv Suav teb yog ib leeg, uas tsuas yog tsim los ntawm Shanghai Petrochemical Co., Ltd. thiab Beijing Yanshan Petrochemical Company. Lawv feem ntau yog siv los ua cov zaj duab xis sib xyaw ua ke thaum tshav kub kub sealing txheej, thiab tsis muaj resin rau semi-siav zaj duab xis, aluminized zaj duab xis thiab siab -kub ua noj zaj duab xis. Nyob rau tib lub sijhawm, cov khoom zoo sib xws ntawm cov lag luam hauv tsev yog qhov hnyav dua. Qhov nce ntawm cov cuab yeej muaj peev xwm ntawm qhov zoo sib xws qis thiab nruab nrab- cov khoom loj yog siab dua li qhov kev thov nce ntxiv. Kev ua lag luam kuj tsis muaj zog, uas tau txwv tsis pub nthuav dav ntawm cov yeeb yaj kiab ntau lawm thiab cov nqi nce. Tsis tas li ntawd, nyob rau hauv ob xyoos dhau los, ntau- txheej co extrusion tshuab tshuab ua lag luam yog nyob rau theem kev loj hlob, thiab qee qhov ntau yam ntawm CPP zaj duab xis raug rau nws cov kev sib tw thiab kev cuam tshuam.
Now, CPP has become an indispensable product in the packaging industry. Manufacturers use new equipment and materials to continuously expand production scale, improve production efficiency, increase product types and expand new application fields. It can be expected that with the improvement of China's economic level and consumption level, its production development will be further expanded. At the same time, we should also see that the casting film still depends partly or entirely on imports. How to speed up its localization is also a major problem to be solved as soon as possible in the plastic processing and resin production industry.
