Is the thickness of the plastic film 0.25mm ( i.e. 250m) or less smooth and soft plastics , according to different purposes blister packs packaging , can be divided into packaging films , agricultural films, industrial films , medical film. Among them, functional packaging film developed rapidly in recent years , and more and more industry attention.Functional differences also called packaging film packaging film , means the film has no special features of the conventional film . Introduction of special features to make the effect of significantly improved packaging film , added value improved significantly , development and application of functional plastic packaging films are often able to get the social and economic benefit . Here are three varieties of functional plastic packaging film.Active barrier packaging filmsActive oxygen barrier packaging film is divided into different types and forms of suction -type barrier film .Type oxygen barrier packaging films and traditional barrier packaging films is different, it can not only effectively prevent oxygen through the membrane , and can remain in the oxygen absorbing plastic film bag , so that the oxygen in the bag is kept at a very low level , so as to effectively extend the shelf life of the product . In recent years, Japan and other industrialized countries, the industrial production of the film has been using to good effect.Type oxygen barrier packaging film is a composite film packaging material of an active layer ( oxygen-absorbing layer ) containing . After the film for packaging oxygen , residual oxygen into the packaging bag by heat-sealing layer oxygen layer , the oxygen in the active oxygen layer packaging material and a chemical reaction is consumed . Use oxygen film packaging food and other commodities, do not have in the bag when the package is loaded oxygen agent , simplifying the packaging process , and avoid eating consumers oxygen agents of the state.Oxygen-absorbing material may be reduced iron / sodium chloride , sodium sulfite , or ascorbic acid as a reactant , the product was blended into the resin , or the clear plastic box use of nylon MXD6 / cobalt salts, double polymer / salt -containing side cyclohexene packaging boxes wholesale the polymer blend of the chain / salt and other substances .Type oxygen barrier packaging films can also be blended into the polyolefin reactant oxygen obtained material which is interposed between the sealing layer and an adhesive layer , preparation of a separate layer of oxygen . Although this will increase the number of layers of the composite film , the manufacturing cost increase, but since the inner layer of the barrier layer , the oxygen absorption bag , will exhibit better results.Can Toyo produced a reduced iron and sodium chloride as the catalyst for the oxygen barrier resin blend type material that can be used to cooking bags , infusion packaging bags , containing vitamin C facial mask packaging bags. The determination of the oxygen absorption capacity of the sample film was 0.3ml/cm2, and oxygen absorption amount of the film by blending oxygen change control agent .Toyo canning company has also developed another active packaging film that suction -type barrier packaging film , the film in addition to a barrier outside, but also absorbs moisture film bag structure: the outer layer / active barrier layer / support layer / absorbent layer / inner layer . Application of the water-absorbing film drugs for clinical examination , powdered green tea, etc. , the function of the packaging material itself is hygroscopic , the application of the water-absorbing film does not have to be a desiccant such as silica gel or calcium chloride and loaded with the contents of the bag sealed.Japan shared printing company also successfully developed a hygroscopic packaging materials, is now developing applications in pharmaceuticals, electronic components and other packaging .Antimicrobial barrier filmAntibacterial nano technology and co-extruded cast process of combining , the development of antibacterial barrier packaging films, for extending the shelf life of food , showing good results , used in packing nut achieved good results.Antimicrobial barrier film structure is : PE40/AD10/EVOH20/AD10 / antibacterial PE40, a thickness of 120m. The film middle layer excellent barrier properties of EVOH resin , the resin is a very good barrier properties , can shield a special flavor and prevent mildew in storage during the betel nut ; inner polyethylene layer using antibacterial , antifungal enhancement effect, while it has good sealing performance , the operation provides good conditions bag ; ordinary polyethylene outer layer , in order to maintain a low cost.Antimicrobial barrier film produced by first dispersing agent aids the process of nano antibacterial agent, and then mixed with polyethylene , pelletized with a twin screw extruder to obtain an antibacterial master batch of polyethylene , polyethylene masterbatch with an antibacterial of the polyethylene resin mixed to obtain antimicrobial polyethylene pellets for co-extruded composite use.Betel nut product processed by special request product pure taste, aroma, traditional betel plastic composite packaging shelf life of about three months or so, antimicrobial barrier packaging shelf life of at least six months . The antimicrobial barrier film bag packaging costs have a greater advantage, cost plastic composite bag ( 64 g bags ) of 0.15 yuan / month, while the nano-antibacterial barrier bag approximately 0.11 yuan / month, to reduce costs by more than 25% . Practice shows that the antimicrobial barrier film for packing nut can not only greatly extend the shelf life of the product, reduce spoilage of goods , but also to reduce packaging costs . Antimicrobial barrier film is a worthy of further study , to promote clam shells for sale new products.VCI plastic filmAlso known as gasification of rust film , it is the film vapor corrosion inhibitor (VCI) mixed in polyethylene plastic film made ??of VCI .At room temperature , having a high vapor corrosion inhibitor molecules than air gasification , the release of molecules ( volatiles ) from the film into the closed package space. Once in contact with the vapor phase corrosion inhibitor of the metal surface of the package , i.e. its molecular moisture concentration was decomposed to form free ions dissolved in the electrolyte. Ions in the electrolyte reacts with the ions VCI , substituted molecules attached to the metal surface of the metal , the metal corrosion inhibiting electrochemical reaction occurs . The vapor phase corrosion inhibitor molecules evaporate slowly and gradually , so that space is always packaged in a " saturated " state, to achieve long-term stability of the rust.VCI has a polyethylene features: without salt clamshell boxes , corrosive gases, high temperatures , high humidity affect the outside layer of the product packaging VCI antirust film , you can play a powerful anti-rust function , rust effect is significant to overcome the traditional method is not sufficient to protect the product drawbacks , especially for metal , machinery and electronic products in the processing, storage, transportation and foreign import and export of sea products of high quality rust-proof requirements.VCI packaging applications when high efficiency . Available in bags , can also use tape, stapler and other simple sealing can be easily achieved rust , packaging automation ; provincial workers, save time , reduce costs and overall economic efficiency significantly . In addition, environmental protection and good , no oil , because oil will not cause serious pollution to the environment. Meanwhile, the long- time anti-rust , maritime protection up to 2 years , storage protection up to five years. Finally , VCI antirust film transparency is good , do not open the package you can see the status of the membrane of the object.As a rust-proof packaging , more traditional anti-rust process can be less five processes, reduce the amount of manpower and material resources VCI film. The traditional rust process: product Equipment rust on rust removing residual oil dry Packaging ??Transport open the package to the oil use . The VCI film rust process: product VCI film packaging ??Transport open the package to use.For the rust VCI film packaging with traditional packaging methods were compared using steel HT300 done a salt spray, humidity , indoor storage of the clear plastic box packaging three groups compared. Among them, the salt spray, humidity test , using VCI plastic film packaging steel later than oiled plastic film packaging rusty time ; stored indoors plastic packaging box , both of which are 180 days does not rust.Starting in 2001 , the domestic auto companies have adopted a VCI film packaging instead of the original packaging oiled proved using VCI film packaging has many advantages, including superior anti-corrosion effect , a good working environment , compared to comprehensive package of low cost , welcomed by users .Through three functional varieties of plastic packaging film presentation, we learned that not only broaden the functional film packaging film applications, and to achieve economic and social benefits double harvest.

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