包装技术基础4.pptxVIP

Lesson 4 Corrugated Fiberboard Boxes 第4课 瓦楞纸板箱 Historical perspective Corrugated Board Properties and Tests Corrugated Boxes Carrier Rules Stacking and Compression一. Historical perspective1. Appearance of corrugated paper and the development First patents for making were recorded in England in 1856. First patents in US were granted to A.L.Jones in 1871Unlined corrugated sheetpacking lamp chimneys and fragile objects.The first user double-lined corrugated boxes was a cereal manufacturer (obtained acceptance in 1903) Figures reversed from 20% to 80% between the world War I and II 2. The specialized produceSheet plants buy combined board only printing and cutting. About 770 plants produce more than 17.3 billion worth in America3. Rules for constructing corrugated containersTo enhance the quality Rule of UFC and NMFC Linerboard (flat facing) Medium (fluted wavy) 二. Corrugated Board1. Construction : linerboard and medium Material :heavy paper containerboard Facingskraft linerboard Mediumone-ply sheet, hardwood or recycled fiber 二. Corrugated Board2 Four types combined board a. Single Face one medium one liner board (for protective wrapping)b. Single Wall (Double Face)one medium two liner boards二. Corrugated Boardc. Double Walltwo mediums three liner boardsd. Triple Wall three mediums four liner boards../jiaoxueluxiang/flash/4-P271.EXE动画Direction: Machine Direction Cross Direction flute direction二. Corrugated Board3. Flutes Profile: arches with proper curve the strongest way to span space Flutes as arches resist bending and pressure, support weight, as cushion. Proper curve: between U and V (Also has its advantages) Flutes also as a insulator to protect sudden temperature changes Vertical linerboard provides strength; protects from damage. Several standard shapes (A,B,C,E,F…) , Contrast:A-flute the largest profileB-flute smaller than AC-flute between A and BE-flute smaller than B F-flute micro-flute New fluteMacro-flute二. Corrug