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5 PLY CORRUGATED BOXES - Packing Material Specification

Name of the material : 5 Ply Corrugated boxes.

Storage requirements : Keep the boxes on pallets at normal

temperature.

Sampling instructions : Follow SOP : xxxxxxx

Qty. of sample to be drawn: Draw 1number from each of the selected

bundle as per sampling plan and subject for complete analysis.

1) Variation in dimension.

2) Cutting

3) Cutting & pasting.

4) No. of Ply

5) Rupture of material when the flap is bent back by 180.6) Rusting of staples.

7) Code no. if any.

Material : Virgin kraft / Non virgin

Ply : 5 Ply

Dimension : 265 x 26 5x 490mm : 5 mm

GSM per Ply : 220 GSM X 2 :150 GSM X3 (limit:22010gsm 150

10gsm)

Nature of corrugation : a) Type of Flute : Narrow fluteb) No. of flute per 30 cms : 48 to 55

Staples : The stitching flap shall be placed internally. Flat metal staples

should be used for angular stitches each. The

staples used should not be rusted.

Finishing : A) Cutting and creasing shall be uniform

B) No rupture of material is noticed when the flaps are bent back by

180

C) The outer flaps shall meet symmetrically at the centerline and no

flap shall project over the edges.Shop floor or performance : Should comply with regard to actual

packing of product

Note. Where C B inner boxes are packed in a master shipper, the

tolerance on dimension for inner box and shipper must be such that it

allows perfect fitting

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1) Grammage : Approximately cut 10 x 10 cm portion of the box and

soak it in hot water for 15 minutes. Separate the plies and dry at 80C.

Flatten the surface of plies and find out the gram per square meter for

all the plies individually.

Calculation for GSM:

Wt. of the cut piece in gms

---------------------------------- x 10000 = _______ GSM

Dimension in cm

(Length x breadth )

2) Bursting strength : Not less than 10kg/cm2

Place the representative sample of the material to be tested over thestage between the diaphragm and the tripod clamp the plate of bursting

strength instrument. The sample should be at least 4 " x 4" in size.

Lower the tripod clamp by turning the clamp wheel applying sufficient

pressure to prevent slip of the sample during test. Set the maximum

hand of the guage at zero or at any point on the scale below the expected

bursting strength.

Push the red push button and keep it pressed, so that plunger will start

rotating in clockwise direction at constant speed of 120 rpm till sample

bursts.Record the bursting pressure indicated by the maximum hand. Repeat

the procedure on several samples or in other areas of the sample as

necessary to obtain average bursting pressure.