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Packaging inspection technology in the quality control process April 7,2022.

1, flexible packaging product market characteristics
2, the type and form of flexible packaging structure
3, the common testing methods and testing tools
4, the shallow media volume control process of several methods
5, the construction of the packaging laboratory points


1.flexible packaging products market characteristics

1.1, the development of flexible packaging is becoming more and more mature, rapid development, small-scale, many manufacturers, accounting for the proportion of national economic output value is rising.
2.1, packaging to the development of specialization instead of scale development, aggregation about the development of higher costs, service industry characteristics: small orders, many varieties, short delivery period, suitable for specialization.
3.1, the deep processing of agricultural and sideline products is a huge market, such as vegetables, fruit, grain, meat and poultry, eggs, in developed countries there are few farmers' markets. Farmers' markets are gradually replaced by supermarkets, and free market meat cases have evolved from frozen sales to the popular fresh sales. Fresh packaging presents a huge business opportunity for many packaging companies, which has achieved the blow molding market. In Japan today, cooking at home is a grand affair, mostly fast food, providing a market for many Chinese high-barrier film manufacturers. The accelerated pace of life, the traditional way of life is rapidly impacted, life towards convenience, clean food, fast food is the inevitable trend of development, all goods are quantitatively packaged, the development of China's packaging industry for tomorrow points the way, packaging will always be vigorous.

2.the type and form of flexible packaging structure

    Today's world is short of natural resources, from the saving of resources and protection of the environment, high consumption of wood, iron, glass and other hard packaging is gradually replaced by flexible packaging, flexible packaging multi-layer composite structure and multi-layer co-extruded film provides a wide range of protective properties.


Structure Performance Application
NYCON/TIE/PE High strength, better barrier properties Weight packaging, liquid packaging, electronic light industry product packaging
PE/TIE/NYLON/TIE/PE High strength, better barrier properties Weight packaging, milk powder, electronic light industrial product packaging
PE/NYLON/PE/NYLON/PE/EVOH/PE High strength, high barrier Toothpaste tubes, preserved food, pharmaceutical packaging

    The quality and technical requirements of different types of packaging films and morphological structures are very different, for example, the quality difference between cast film and blown film.
    In blown film, the elongation rate is lower than that of cast film due to the process, and in blister packaging, there is a certain requirement for elongation rate, so cast film is usually used. We have customers in Zhongshan and Dongguang who use cast and blown film respectively, and their oxygen permeability is lower than 1cc/m2.

There is a huge market for co-extruded films in the following structures that we use every day

Material structure: 

     PET//NY//AL//CPP      

     PET//NY//AL//HDPE.
     PET//AL//PET//L-LDPE.
     PET//AL//CPP.
     PET//AL//HDPE.
     PET//NY//CPP.
     NY//VMPET//CPP.
     NY//VMPET//HDPE.
     PET//AL//PE.
     NY//HDPE.
     NY//EVOH//PET//L-LDPE.
     PET//CPP.

     OPP//CPP.
     OPP//VMCPP,
     OPP/PP
     PET//AL//CPP.
     PET/PE/AL/PE/LDPE.
     PET/PE/AL/EVA/PE
     PET/PE/VMCPP.
     OPP/PP.
     OPP/PE/CPP
     OPP/PE/VMPET//LDPE.
     OPP/PE/VMPET//CPP
     OPP//CPP.
     NY/PE/AL/PE.
     NY//AL/PE.
     PET//VMPET/PE/L-LDPE.

GB/T 10005--1998 bi-oriented polypropylene (BOPP) / low density polyethylene (LDPE) composite film, bags 

This standard is GB 10005 - 88 "biaxially oriented polypropylene composite low-density polyethylene (BOPP / LDPE) film and packaging bags," the first revised version.
     This standard was revised to increase the product requirements for extruded composite films and bags, solvent residue items added to the indicators of benzene solvents. Compared with the original standard, the scope of application is more reasonable, higher product requirements, test methods are more scientific.
     This standard is not equivalent to JIS Z1707-1995 "plastic film for food packaging".
     This standard is proposed by China Light Industry Council.
     This standard is attributed by the National Technical Committee for Standardization of Plastic Products.
     This standard is drafted by: Wuxi Guotai Color Printing Co.
     The main drafter of this standard: Gu Zengjian, Gu Hongqing, Wu Yongsheng, Han Zhenghong, Wen Xiusong.
1 Scope
     This standard specifies the biaxially oriented polypropylene (BOPP) / low density polyethylene (LDPE) by dry or extrusion laminated film and bags (hereinafter referred to as film, bags) product classification, requirements, test methods, inspection rules, marking, packaging, transportation, storage.

This standard applies to biaxially oriented polypropylene and low-density polyethylene as the base material by dry or extrusion lamination of film, bags. Products for food, daily chemical products and other light packaging 
2 Citation standards
     The following standards contain provisions that constitute the provisions of this standard by reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards.
     GB 1037--88 Test method for water vapor permeability of plastic films and sheets Cup method
     GB 1038--70 plastic film permeability test method
     GB 2828--87 batch-by-batch inspection counting sampling procedures and sampling tables (for continuous batch inspection)
     GB 2918--82 Plastic specimen state conditioning and testing of the standard environment
     GB/T 5009.60--1996 Food packaging with polyethylene, polystyrene, polypropylene finished health standards for analytical methods
     GB 6672--86 plastic film and sheet thickness determination mechanical measurement method
     GB 6673--86 plastic film and sheet length and width of the determination

     GB 7707--87 Gravure printed matter

     GB 8808--88 soft composite plastic material peel test method

     GB 8809--88 plastic film pendulum impact test method
     GB 9683--88 composite food packaging bag health standards
     GB 13022--91 plastic Film tensile properties test method

     GB/T 14937--94 composite food packaging bags in the diaminotoluene determination method
     QB/T 1130--91 Plastic right angle tear performance test method
     ZB Y28 004 - 86 plastic film packaging bag heat sealing strength determination method

3 Product classification

     Products according to the inner layer of LDPE different thickness and compounding method is divided into A, B, C, E, F five categories, base in A, B, C for dry composite products, E, F for extrusion composite products (see Table 1).

Table 1 Product classification 



 






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