包装工程课件-瓦楞纸板箱.pptVIP

瓦楞纸板箱 Historical perspective Corrugated Board Properties and Tests Corrugated Boxes Carrier Rules Stacking and Compression 一. Historical perspective 1. 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 1871 Unlined 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 produce Sheet plants buy combined board only printing and cutting. About 770 plants produce more than 17.3 billion worth in America 3. Rules for constructing corrugated containers To enhance the quality Rule of UFC and NMFC 二. Corrugated Board 1. Construction : linerboard and medium Material :heavy paper containerboard Facingskraft linerboard Mediumone-ply sheet, hardwood or recycled fiber Linerboard (flat facing) Medium (fluted wavy) 二. Corrugated Board 2 Four types combined board b. Single Wall (Double Face) one medium two liner boards a. Single Face one medium one liner board (for protective wrapping) 二. Corrugated Board c. Double Wall two mediums three liner boards d. Triple Wall three mediums four liner boards Direction: Machine Direction Cross Direction flute direction 动画 二. Corrugated Board 3. 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-flut