文档介绍：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 pression
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 in 1871
Unlined corrugated sheet---packing 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 bined board only printing and cutting.
About 770 plants produce more than 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
Facings---kraft linerboard
Medium---one-ply sheet, hardwood or recycled fiber
Linerboard (flat facing)
Medium (fluted wavy)
二. Corrugated Board
2 Four bined 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-flute ---- the largest profile
B-flute ----smaller than A
C-flute ----between A and B
E-flute ---- smaller than B
F-flute ---- micro-flute
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