Poly Bag Costing for Garments Merchandiser

Poly Bag Costing for Garments Merchandiser:

Most used poly bags in garments industries are PP (polypropylene) poly bags, PE (polyethylene) & LDPE (low-density polyethylene), HDPE (high-density polyethylene), etc. Basically, there’re three different ways to measure poly bags thickness.

Mil (1 mil = 1/1000 of an inch)

Microns (1 microns = 1/1000 of a mm)

Gauge (1 gauge = 1/100000 of an inch)

Conversion, 1 mil = 25 microns = 100 gauge.Note: Gauge is the most used system of counting poly bags’ thickness worldwide.

Example-1:

A poly bag having length of 30 inches, flap 3 inches, width 16 inches, poly thickness 150 gauge. Now find out the weight of 1000 pcs poly bags?

Answer: {(30 + 1.5) x 16 x 150 / 3300} = 22.91 KGs for 1000 pcs

Formula: KGs needed for 1000 pcs poly bags = {(length + half flap) X width X gauge / 3300}

Now, if we want to find out the weight of 1 pcs poly bag, then we need to divide the outcome by 1000.

Answer: 22.91 / 1000 = 0.023 KGs. (1 pcs poly bag weight)

Note: You see, I count flap measurement in half (1.5 inches) during calculation because the flap is single layer & length, the width of a polybag is double layer.

Example-2:

An LDPE poly bag having 28” length, 3” flap, 14” width, 140 gauge thickness with the self-adhesive facility, and if the cost of polymer is $.50 per lb. Let’s find out the cost of 1 pc poly bag.

Solution:

So, weight of material = (28+3 X 14 X 140) / 3300

= 60760 / 3300

= 18.412 kg /1000 pics

To produce 1000 pics of poly bag, need 18.41kg polymer.

Cost of Material = 18.412kg x $.50 per lb

= 18.41 x $1.1/Kg (as we know 1 kg = 2.20 lb)

= $20.253 / 1000 pics.

= $0.020 (cost of 1pc poly bag)

Cost of Adhesive tape = 28” x $.002

= $.056

So, final cost of 1 pc poly bag will be = ($0.020 + $.056)

= $0.076