The two most popular new standards for film coveri

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Two new standards for film coating were promulgated. The national printing standards committee made every effort to promote the publication of the notice on Approving the issuance of two industry standards for paper printed matter film coating process control and testing methods, Part 1: basic requirements and Part 2: EVA type precoating (Xin chu ban [2007] No. 1473). The two film coating standards formulated by the National Printing Standardization Technical Committee shall be implemented from the date of publication. The notice emphasizes that according to the spirit of eliminating the equipment using volatile solvent adhesive for film coating in the catalogue of eliminating backward production capacity, processes and products (the third batch) issued by the State Economic and Trade Commission on june2,2002, the equipment and processes using volatile solvent adhesive for film coating shall be eliminated from the Perspective of employee safety and environmental protection, The CY paper printed matter film covering process control and testing methods Part 1: basic requirements, which contains the relevant provisions prohibiting the use of volatile solvent adhesives for film covering, will be issued and implemented in the form of mandatory standards to protect the interests of employees working in the film covering field

at present, according to the requirements of the General Administration, the National Printing Standardization Technical Committee is organizing and arranging the implementation of the two film covering standards in terms of filing, publishing, publishing, interpretation, publicity and implementation, and making every effort to promote the implementation of the two film covering standards. Recently, I interviewed Ang Lee, Secretary General of the National Printing Standardization Technical Committee, on the introduction of these two industry standards

: the two standards considered are aimed at the laminating process of paper printed matter. First of all, would you like the Secretary General to introduce the film covering process of paper printed matter

Ang Lee: the post press lamination process belongs to the surface decoration processing process of printed matter. It mainly refers to the processing technology of covering a layer of transparent plastic film on the surface of paper printed matter to form a paper plastic product. The coated printed matter has been correspondingly strengthened in terms of wear resistance, folding resistance, moisture resistance, oil resistance and tensile strength, which not only protects the appearance effect of various printed matter, but also improves the service life. The laminating process is widely used in the decorative processing of all kinds of packaging and decorating printed materials and the surfaces of all kinds of books, periodicals, books, calendars, maps, manuals and various certificates in China

: what is the cause and background of the formulation of these two standards

Ang Lee: the purpose of drafting this standard is mainly to regulate the film covering market. According to the spirit of relevant documents of the national development and Reform Commission, from the perspective of employee safety and environmental protection, it is necessary to eliminate the equipment and process using volatile solvent adhesive for film covering. This standard is formulated to comply with this industrial policy and to regulate the film covering quality of the whole paper printed matter. Part 1 of this standard: definition of film covering terms for paper printed matter, environmental protection requirements for film covering process, quality requirements for raw materials and film covered finished products, basic test methods and test tools. Chapter 4 4 The long fiber reinforced material is compatible with any thermoplastic and mixed fiber solution. Article 2 is about the hot melt adhesive for film covering. It is a mandatory clause, and other clauses are recommended clauses. The mandatory part in part 1 mainly specifies the content of benzene, toluene, xylene, halogenated hydrocarbon and other toxic organic solvents in the film covering glue, film covering workshop and film covering finished products. Through this clause, the purpose of eliminating the backward solvent type coating sup6 decarburization layer and gradually increasing the film process is achieved. Part 2 is the process control standard for precoating and coating, which specifies the terms, raw material requirements, process requirements, equipment requirements, environmental requirements of EVA precoating and coating, and the measurement and conditioning of screws to appropriate positions; Test method for tightening the oil return valve. It is used to standardize the technical parameters in the process of precoating and laminating, and stabilize the laminating quality of paper printing in China. In the future, our Secretariat will also consider formulating relevant standards for water-based film covering and pur film covering according to the situation

: what processes are required for the formulation of the two standards

Ang Lee: in October, 2005, the National Printing Standardization Technical Committee, in accordance with the spirit of the relevant documents of the national development and Reform Commission and the actual needs of the printing and packaging industry, and with the consent of the General Administration of publication, decided to draft and formulate the first and second parts of the film covering standards for the publishing industry, namely, the control and testing methods for the film covering process of paper printed matter Part 1: basic requirements Standard for process control and test methods for film coating of paper printed matter Part 2: EVA type precoating film. With the active cooperation and participation of Beijing kangdexin printing equipment Co., Ltd., printing product quality supervision and testing center of the General Administration of publishing, people's Literature Publishing House and Foshan Yike Plastic Manufacturing Co., Ltd., a drafting group was established on February 16, 2006, and standard drafting meetings were held on February 16 and July 25, 2006 respectively. The text drafts of relevant standards were completed. After a series of tests and verifications, Two exposure drafts of film covering standards have been formed

in July, 2007, on the basis of soliciting the opinions and suggestions of the members of the printing and Standardization Committee, the standard drafting group, through consensus, revised the two exposure drafts of film covering standards to form a draft for review, and then submitted it to the General Administration of publication for review and approval

: facing these two standards, what should printing enterprises pay attention to in the next step

Ang Lee: the introduction of each standard is the product of science and technology and practical experience. Most of the contents are conclusive or overall requirements and indicators. At present, the two standards that we have considered and formally promulgated are the first to be promulgated in China, and there is no precedent. This requires that relevant personnel, especially comrades in printing enterprises, must study carefully, deeply understand the content of the standard or the requirements of each indicator, and understand and master the requirements and their related relationships. Only by learning and understanding can we facilitate the correct implementation. On the one hand, we should accurately master the terms and definitions. For example, laminating, delamination, Shortfilm, curl, creases, chromaticdefect, etc. at the same time, the requirements for raw materials should be kept in mind. For example, the content of halogenated hydrocarbon (calculated by dichloroethane) in the adhesive shall be less than 1000mg/kg, and the compound annual growth rate before coating is only 4%, and the wetting tension of printing ink is 36 dyne; Third, we should be clear about quality standards. For example, the bonding strength is 2.67n/cm, and the physical dimension tolerance is 1mm. And so on

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