Lecture on molding and color printing technology o

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Lecture on plastic packaging material molding and color printing technology

Speaker: Zhou Xiangxing (Senior Engineer)

Lecture 1: introduction to packaging 1 Definition, classification and function of packaging. 2. Current situation and development trend of plastic packaging at home and abroad. 3. Treatment of packaging waste and green packaging. 4. Living habits and taboo colors and patterns in countries around the world. Lecture 2: synthetic resin for plastic packaging 1 Basic knowledge of synthetic resin and modification of resin. 2. Polyethylene materials: LDPE, HDPE, LLDPE, VLDPE and MPE, EVA, Surlyn and adhesive resin. 3. Polydiene materials. C、PVDC。 5. Engineering Plastics: pet, nylon and PC. Lesson 3: auxiliary materials for plastic packaging 1 Jar plasticizer. 2. Antioxidant and light stabilizer. 3. Stabilizer. 4. Flame retardant. 5. Compatibilizer. 6. Lubricant. 7. Coupling agent. Lecture 4: molding methods and equipment of plastic packaging 1 Extrusion process. 2. Injection process. 3. Calendering process. 4. Biaxial stretching process. 5. Squeeze blow and injection blow processes. 6. Casting and rotational molding process. 7. Composite process. 8. Coating and plastic metallization. Lesson 5: flexible plastic packaging single film and composite film 1 Basic characteristics of single membrane and performance requirements of composite membrane. 2. Shrink the film. 3. Stretch the winding film. 4. Fresh keeping film. 5. High barrier materials and their application in flexible packaging. 6. High temperature cooking bag. 7. Conductive packaging film and sterile packaging film. 8. Hygiene of plastic film. Lesson 6: hard plastic packaging and other packaging materials. 1. Cushioning packaging materials: PE foam, PP foam, PVC foam, PU foam, phenolic and

aldehyde foam. 2、 Plastic bottle: squeeze blow main injection blow bottle. 3、 Plastic packing belt, turnover box, air cushion materials. 4、 Thermoformed packaging materials. 5、 Paper and paper/bottle composite packaging products. 6、 Adhesive tape. 7、 Composite ointment and electronic components packaging. Lecture 7: printing and coating of plastic packaging materials I. definition, classification and development of printing. 2、 Analysis of factors affecting printing quality. 3、 Optical principle in printing. 4、 Gravure plate making and printing technology. 5、 Soft plate making and printing technology. 6、 Silk printing plate making and printing technology. Plastic packaging materials molding and color printing technology lecture Lecture 1 Introduction section 1 Definition and function of packaging the protective wrapping of any commodity can be regarded as packaging. This view is static. In fact, packaging should also include the transportation, storage and use of goods. A complete definition of packaging is: the means by which goods can be transferred from producers to consumers and their use value can be completely maintained is called packaging. Packaging has at least the following functions: (1) reduce storage costs and facilitate the transportation and storage of products; (2) Reduce the cost of transportation; (3) Simplify warehouse management; (4) Break the seasonality of commodities; (5) Promote the sale of goods; (6) Protect the use value of commodities. Good commodity packaging must meet the following requirements: 1 It should have a good function of protecting the use value of commodities; 2. It should have good convenient functions, which are convenient for transportation, storage, stacking, exhibition, counting and inspection; 3. Have good merchantability, improve the grade of commodities and promote the sales of commodities; 4. There should be brief and concise information transmission. Producers and consumers of commodities cannot meet directly. They rely on the printing on the commodity packaging to communicate with each other. At least the following information should be transmitted: commodity name, production date, purpose, manufacturer, use and storage method, trade mark name, brand number, batch number, quality assurance and validity period. 5. The price is reasonable. The packaging of products should be designed at the same time of designing products. The principle of designing commodity packaging is to adopt the lowest price packaging on the premise of comprehensively meeting the packaging requirements of commodities. 6. Packaging waste should be easy to handle. Section II Classification of packaging I. classification according to the form of packaging: one package: one package for a single commodity. Inner packaging: sales packaging, which consists of a certain number of packaged goods, such as ten or twelve (a dozen) goods. This kind of packaging should be considered convenient for the exhibition of retail stores. Outer packaging: transportation packaging. 2、 Classification according to the purpose of packaging, classification according to purpose and function: domestic packaging: the goods are sold in China, the distance is relatively close, and the customs and habits are relatively understood; Foreign packaging (export packaging): you should know the customs and habits of the commodity sales area in detail and predict the sales date; Special packaging: packaging of guns and ammunition, packaging of radioactive materials, packaging of precious artworks, etc. 3、 Classified according to the packaging materials used: paper and paper hydraulic universal testing machine adopts high-strength light bar to fix the upper beam and workbench panel for packaging; Plastic packaging; Glass packaging; Metal packaging; Wood packaging; Other packaging. 4、 It is classified by means of transportation: railway transportation packaging, road transportation packaging, air transportation packaging and marine transportation packaging. In order to meet the above packaging requirements, there are different specific requirements for various packaging. 5、 It is classified according to the specific methods of packaging: waterproof packaging, heat-resistant packaging, vacuum packaging, high-temperature cooking and sterilization packaging, castor free packaging, buffer packaging, vapor phase rust prevention packaging. 6、 It is classified according to the contents of the package: food packaging, hardware tool packaging, drug packaging, weak electrical appliance packaging, mechanical packaging, chemicals or SME or same terminal or surface modification technology packaging mentioned in the data sheet. Section III importance, current situation and development of packaging I. importance of packaging. Food will rot and deteriorate without good packaging. Tens of millions of tons of food are wasted every year because of poor packaging in the world. This food is enough to keep more than 300 million hungry people alive. Good packaging greatly prolongs the storage period of food, so that the flavor food from all over the world that was impossible to taste can be sold all over the world. Packaging reduces the damage in transportation and undoubtedly increases the output of products. 2、 The current situation of packaging industry at home and abroad. 1. Development of foreign packaging industry: in terms of materials, paper and paperboard packaging paper occupy the first place, while plastic is already the second packaging material. The packaging industry develops synchronously with the national economy at a rate of 2-3% every year. Generally speaking, the packaging industry accounts for about 2% of the gross national economic output value. 2. Development of domestic packaging industry: domestic plastic packaging industry accounts for 25% of the plastic industry, and plastic packaging is also 25% of the packaging industry. Plastic packaging has basically met the requirements of national economic development since 1958. The key is whether the disposal of plastic packaging waste can be properly treated to prevent serious environmental pollution. The treatment methods of waste plastic packaging materials at home and abroad are as follows: (1) soil burial method: it costs labor, money and land, and has been gradually eliminated. (2) Incineration method: the key to adopting this method in Japan, Europe and the United States is the recycling and purification of incinerator waste gas to prevent secondary pollution. Japan is an advanced example, 100% of which has tail gas recovery and purification devices, which does not pollute the air. (3) Recycling of waste plastics: PVC recycling, terephthalic acid and ethylene glycol as the dry weight of pet, and vehicle fuel oil as the dry weight of mixed waste plastics. The policy of recycling waste plastics is very important. The United States and Europe have formulated mandatory recycling policies, which China can follow. Section 4 the photoelectric encoders of packaging products in various countries will have the taboo colors and patterns of pulse signal output. 1. Figures and animal taboos in various countries Hong Kong, Japan, Singapore, South Korea, Malaysia, Because "4" is homonymous with "death", I am very disgusted with "4". In Africa and Singapore, I am very disgusted with "7". In Europe, America and some other countries "13" is annoying. In Muslim countries, I don't like pandas very much. Elephants are not very popular in Britain and Europe. Goats are compared to immoral men in Britain. Some countries in northern Africa avoid using the pattern of dogs. Thais don't like dogs either. The American word Rooster as a slang means to preach rumors. Indians hate roosters and palm trees most. Peacocks are India's national birds, but Europeans don't like them, and think they are evil birds. Cranes are in France The country has been demoted as a synonym for stupid men and prostitutes. Africans believe that cranes are ferocious birds. Owl is used to be a fierce bird in Chinese people, but in Western hearts, it is the embodiment of wisdom, courage and fortitude. The French and Belgians taboo peacocks, walnuts and chrysanthemums, while the Japanese taboo lotus, foxes and badgers. 2、 Color taboos in various countries Indians like red and monkeys, Austria is noble in green, Bulgaria likes grayish brown and green, Turks like green, French and Belgian people hate green, Ghana takes orange as the mourning color, Austrians like green best, Bulgarians hate bright green (because it represents the anarchist peasants' Party), Switzerland takes black as the mourning color, and Brazilians take purple as sadness, Dark tea is misfortune, yellow is despair, and dark coffee will bring misfortune and deep disgust. Americans love brightly colored patterns and oppose purple. Islamists particularly hate yellow because it symbolizes death, and likes green, which can drive away diseases and evil| Material market | mechanical equipment | printing books | industry business information | product display | manufacturer inquiry | member zone

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