E3: Design Protection against Compression

As almost all engineering formulas you only get a prediction as you can se of following tests made in different kind of corrugated and different box sizes.

Corrugated ECT in N/m

A = 6130
B = 5450
C = 6130
D = 8910

Corrugated	L x W x H in mm	Mc Kee in N	Measurement in N
A	200x200x200	1672	2250-2900
A	400x400x400	2466	3100-3650
B	400x200x200	2406	2150-2500
C	200x200x200	2006	2300-2750
C	400x200x200	2709	2600-3100
C	400x400x200	2886	2800-4000
C	400x400x400	2506	3100-4000
D	400x400x400	5339	6200-7600

Typical Mc Kee’s formula gives a pessimistic result. But you also see cases of measurements lower than predicted in the formula.

IMPORTANT!

Corrugated is as many other packaging materials produced under large variations. Alone the ECT on the same production batch can vary +/- 30% around average.

/TAB

Document Info

Document ID:
Document Type:

10688,7
Subject

2012-02-20
2007-07-09

Approved:
Revision of content: