食品包装及材料学

1、食品包装学Food Packaging Definition Food packaging is packaging for food. It requires protection, tampering resistance, and special physical, chemical, or biological needs. It also shows the product that is labeled to show any nutrition information on the food being consumed. Functions of food packaging

2、Packaging has several objectives: Physical protection - The food enclosed in the package may require protection from, among other things, shock, vibration, compression, temperature, etc. Barrier protection - A barrier from oxygen, water vapor, dust, etc., is often required. Permeation is a critical

3、factor in design. Some packages contain desiccants or Oxygen absorbers to help extend shelf life. Modified atmospheres or controlled atmospheres are also maintained in some food packages. Keeping the contents clean, fresh, and safe for the intended shelf life is a primary function. 干燥剂 Containment o

4、r agglomeration - Small items are typically grouped together in one package for reasons of efficiency. powders, and granular materials need containment. 凝聚 Information transmission - Packages and labels communicate how to use, transport, recycle, or dispose of the package or product. Some types of i

5、nformation are required by governments. Marketing - The packaging and labels can be used by marketers to encourage potential buyers to purchase the product. Package design has been an important and constantly evolving phenomenon for several decades. Security - Packaging can play an important role in

6、 reducing the security risks of shipment. Packages can be made with improved tamper resistance to deter tampering and also can have tamper-evident features to help indicate tampering. Packages can be engineered to help reduce the risks of package pilferage plfrd : Some package constructions are more

7、 resistant to pilferage and some have pilfer indicating seals. Convenience - Packages can have features which add convenience in distribution, handling, stacking, display, sale, opening, reclosing, use, and reuse. 堆垛 Portion control - Single serving packaging has a precise amount of contents to cont

8、rol usage. Bulk commodities (such as salt) can be divided into packages that are a more suitable size for individual households. It also aids the control of inventory: selling sealed one-liter-bottles of milk, rather than having people bring their own bottles to fill themselves. 存货 Packaging Materia

9、ls Textiles纺织品 Cotton棉 Kenaf 麻 Sisal 剑麻 Wood木材 Traditional packaging materials Leaves叶（香蕉或芭蕉叶） Vegetable fibres植物纤维 Bamboo and rattan竹材和藤条 Coconut palm椰棕 Treated skins皮革 Earthenware陶瓷 Metal金属 Glass 玻璃 Flexible films柔性薄膜 Food packaging typesPackaging typeType of containerFood examplesAseptic processi

10、ngPrimaryLiquid whole eggsPlastic trays托盘PrimaryPortion of fishBags袋PrimaryPotato chipsBoxes箱SecondaryBox of ColaCans罐PrimaryCan of Tomato soup.Cartons纸箱PrimaryCarton of eggsFlexible packaging软包装PrimaryBagged saladPallets托盘TertiaryA series of boxes on a single pallet used to transport from the manuf

11、acturing plant to a distribution center.WrappersTertiaryUsed to wrap the boxes on the pallet for transport. Primary packaging is the main package that holds the food that is being processed. Secondary packaging combines the primary packages into one box being made. Tertiary packaging combines all of

12、 the secondary packages into one pallet. Packaging machines A choice of packaging machinery includes technical capabilities, labor requirements, worker safety, maintainability, 可维护性serviceability, reliability, ability to integrate into the packaging line, capital cost, floor space, flexibility (chan

13、ge-over, materials, etc.), energy usage, quality of outgoing packages, qualifications (for food, phamaceuticals, etc.), throughput, efficiency, productivity, ergonomics, etc. 吞吐量 人体工程学 Packaging machines may be of the following general types: Blister, Skin and Vacuum Packaging Machines Capping, Over

14、-Capping, Lidding, Closing, Seaming and Sealing Machines Cartoning machines装盒机 Case and Tray Forming, Packing, Unpacking, Closing and Sealing Machines Check weighing machines Cleaning, Sterilizing, Cooling and Drying Machines Conveying, Accumulating and Related Machines Feeding, Orienting, Placing a

15、nd Related Machines吸塑 Filling Machines: handling liquid and powdered products Package Filling and Closing Machines Form, Fill and Seal Machines Inspecting, Detecting and Checkweighing Machines Palletizing, Depalletizing, Pallet Unitizing and Related Machines Product Identification: labelling, markin

16、g, etc. Wrapping Machines Converting Machines Other speciality machineryReducing Food Packaging Reduced packaging and sustainable packaging are becoming more frequent. The motivations can be government regulations, consumer pressure, retailer pressure, and cost control. (Reduced packaging often save

17、s packaging costs.) Trends in food packaging Numerous reports industry associations agree that use of smart indicators will increase. There are a number of different indicators with different benefits for food producers, consumers and retailers. Temperature Recorders Temperature recorders are used t

18、o monitor products shipped in a cold chain and to help validate the cold chain. Digital temperature data loggers measure and record the temperature history of food shipments. They sometimes have temperatures displayed on the indicator or have other output (lights, etc): The data from a shipment can

19、be downloaded (cable, RFID, etc) to a computer for further analysis. These help identify if there has been temperature abuse of products and can help determine the remaining shelf life.5 They can also help determine the time of temperature extremes during shipment so corrective measures can be taken

20、. Time-Temperature Indicators Time-Temperature Indicators integrate the time and temperature experienced by the indicator and adjacent foods. Some use chemical reactions that result in a color change while others use the migration of a dye through a filter media. To the degree that these physical ch

21、anges in the indicator match the degradation rate of the food, the indicator can help indicate probable food degradation. RFID Radio Frequency Identification is applied to food packages for supply chain control and has shown a significant benefit in allowing food producers and retailers create full real time visibility of their supp