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 The printing process of food packaging bags

Back to list Source: Haida Packaging View mobile site Views: 26 Release Date: 2017-07-18 14:08:36 【Big Middle Small】
 The production process of food packaging bags
 How a food bag is produced, from the order until the sale of the product, the whole process is how the circulation, the following content is for reference only!
 First, the order
 Flexible packaging production business unit received a new order, the content is the number of 200,000 three-side sealed bag, customer information as shown in the table.
 Table 1: Order information
 Single number
 01031
 client's name
 A food limited company
 product name
 196g fast food high calcium protein bean curd bag
 product structure
 BOPP28 / CPP50
 Product specifications
 255 mm x 190 mm x 80 m
 Second, the order analysis
 Salesman received orders, the price confirmation, and then according to the production and processing needs to prepare raw and auxiliary materials, and the quality inspection departments after acceptance, in accordance with the bean curd bag production process.
 Third, the product price
 The sales price of plastic bags is mainly composed of material cost, production loss and gross profit of the enterprise, namely: flexible packaging products offer = packaging materials cost + production loss + business gross profit (due to different periods of raw material prices fluctuate, only given the calculation Formula, do not do specific numerical statistics.)
 1, the cost of packaging materials
 ①BOPP material costs
 Price per square meter Price: Unit Price × Density × Thickness / 1000
 Per square meter weight: per square meter × density × thickness
 ② printing processing costs
 Full version of the printing ink to become 8g / ㎡, full version of the printing and then check the white into 128g / ㎡.
 Price per square meter Price: Unit Price × on the amount of ink / 1000
 Per square meter weight: per square meter × density × thickness
 ③ CPP material costs
 Price per square meter Price: Unit Price × Density × Thickness / 1000
 Per square meter weight: per square meter × density × thickness
 ④ composite processing costs
 Dry basis on the amount of glue on the amount of dry glue on the amount of glue + solid content / 1000
 Solvent cost = solvent quantity x glue solvent price / 1000
 2, loss
 Loss is related to the order quantity. In this case, the size of the trilateral seal is 255mm × 190mm. According to the layout, the repeat length of the horizontal row is 190mm and the number of horizontal rows is 2. The middle and the sides are 10mm long, Width of 790mm, version around 510mm, the printing plate every week to print four bags, then the 200,000 bags required film length of 25500m, because the three sides of the bagging process for the printing - composite - bag, no need Divide.
 Printing loss
 It is known that the new order test loss of the manufacturer is 1500m and the loss of the old order is 500m. In this case, the loss rate is 1500 / (25500 + 1500) = 5.6% according to the new order.
 ② compound loss
 Compound loss is about 1.5% for a composite, 3% for both times and 4.5% for three times. This case is a composite, that is, about 1.5% loss.
 ③ bag loss
 Production in general, if the number of bags> 50,000, the loss of about 1.5%, <5 million, the loss of about 2%, the case of 200,000, the loss of 1.5%.
 ④ edge loss
 According to the width of the three-side bag, the film required in the production of the width of 190 × 4 = 760mm, but the printing film width of 790mm, that is, edge loss of 30/790 = 3.8%.
 3, gross profit
 Enterprises in the development of sales prices also need to consider the cost of auxiliary materials used in production (such as paper core, tape paper, etc.), labor costs, utilities, management costs, transportation and profits, according to the complexity of the bag processing technology , Enterprises generally add 10% to 40% of the gross margin. Since the bag structure is relatively simple, the margin can be positioned 20%.
 4, the sale price
 Based on the above analysis, the composite membrane quotation was finally determined.
 Fourth, raw materials procurement and testing
 According to customer requirements, combined with the actual production company, the development of bean curd bags used in raw materials, product packaging bags and other performance requirements, the corresponding project testing methods and standards.
 1, raw and auxiliary materials testing
 According to the main raw and auxiliary materials corresponding to the conventional testing items, according to national standards, industry standards, corporate standards for BOPP, CPP, ink, adhesives, solvents to do the relevant tests.
 2, printing plate production
 According to the bag specifications and material requirements, to determine the printing of the number of bags and weeks of printing, version and so on. The plate is made by professional plate making company.
 Fifth, product production
 1, raw materials used:
 According to the number of orders, product specifications, typesetting and composite processes, the proportion of loss of bag making process to determine the amount of raw materials used.
 2, the production process:
 Determine the printing, compound, bag making process
 Six, semi-finished products, finished product performance testing
 Printing semi-finished products inspection items:
 Color, overprint error, dot, pattern layout, ink adhesion and light distance.
 Composite semi-finished products testing items:
 Appearance, composite initial adhesive strength, section smoothness, light distance.
 Bag finished product testing items:
 Length deviation, width deviation, seal width deviation, bag pattern position deviation, bag foot deviation, punching position deviation, tearing position, appearance quality, edge quality.
 Bag finished product testing items:
 Tensile force, elongation at break, composite peel force, sealing peel force, pressure resistance, drop resistance, quantity.
 Seven, packaging and storage
 After the printing, composite, bag making process made of finished bags, by the quality inspection departments in accordance with a certain proportion of sampling, qualified products will be packaged in accordance with the requirements of the process, finishing the outer bag into the provisions of storage temporarily. To ensure that the closure of the formation of good appearance.
 Packaged products, the whole board storage, placed in the corresponding area placed neatly, stacked should meet the health requirements, regular inspection, dry ground, ventilation, clean. To do rodent control, pest control measures. And give a clear identification.


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