Poly bag
commonly known as polythene bag and most of the important materials in textile
industry. This plastic packet used to keep the garments product from dust, dirt
or moisture free and keep the garments intact. Export oriented factory use the
poly bag to insure the garments quality and safety. In textile sector, poly bag
is important material and need to know how to calculate the consumption of poly
bag and need to know how to calculate / measure cost of poly bag.
To produce
the poly bag, there are different types of material are used such as PP, LDPE,
HDPE etc. In textile sector, garments industry commonly uses PP and PE poly for
packing the garments, but buyer prefers to use environmentally friendly poly.
Here, environmental means poly that can be recycled. Now – a – day, buyer
prefer LDPE poly for packaging the garments in finishing section. Only LDPE
poly can be recycled, others can’t be recycled. Also note that, LDPE poly is
little bit expensive than others poly.
There are
lots of different type of poly bag used in textile industries, find the below:
- Button poly bags
- Poly bag with flap
- Adhesive poly bags
- Gadget poly bag
- Zip poly bag
- Plain poly bags
- Hanger poly
- Gusseted poly bag
-
Mil
- Microns
-
Gauge
From above
list, Gauge is most popular system of counting the thickness of poly bag in
garments industries. To measure thickness by using Mil (1 Mil = 1/1000 of an
inch). For Microns (1 Microns = 1/1000 of an mm). For Gauge (1 gauge = 1/100000
of an inch). From above three system, globally Gauge is most popular and used
system of counting poly bag thickness.
To calculate
the consumption of poly bag, need to collect below information based on buyer
requirement:
- Length of Poly bag in inch.
- Width of Poly bag in inch.
- Thickness of poly bag in gauge.
- Flap of poly bag – here flap will be ½. (Note: flap is single layer and width of poly bag is double layer)
- To insure, poly will have print or not. (Note: print can be any type like; logo, text, warning etc.)
Using simple
formula, we can easily find out the poly bag consumption for an order. Find the
below formula:
{(Length of Poly bag + ½ Flap) x Width of Poly
bag x Thickness of Poly bag}
------------------------------------------------------------------------------------------------
3300
Note: Here 3300 is a constant number for 1000 pcs
For better
understanding, let’s see what we will get after using above formula. Suppose, a
garment exporter has an order (like 50,000 Pcs T-shirt) with below information
for buyer “H&M”. Here, we consider LDPE poly:
- Length of poly bag – 28 inches.
- Width of poly bag – 24 inches.
- Thickness of poly bag – 160 gauge.
- ½ flap of
poly bag – 2.5 inch.
Let’s
calculate the consumption of poly bag for 50,000 Pcs T-shirt,
{(Length of
Poly bag + ½ Flap) x Width of Poly bag x Thickness of Poly bag}
------------------------------------------------------------------------------------------------
3300
= {(28+2.5)
x 24 x 160 / 3300
= 35.50 Kgs
for 1000 Pcs
For 1 pcs poly bag need polymer,
=
(35.50/1000) kg = 0.0355 kg = (0.0355 x 2.20) lbs = 0.0781 lbs Needed. (Note that, 1kg = 2.20lbs)
So, 50K pcs of garments; LDPE Poly
need total;
= Polymer
needed for 1 pc poly bag x Total Order Qty Pcs
= 0.0781 x
50,000
= 3905 lbs
(pound)
Above
consumption calculated, considering the LDPE poly for garments packing in
finishing section. For your kind information, consumption will vary based on
poly measurement, thickness and print. So, before calculating the poly bag consumption
need to collect all information based on current market situation and buyer requirement.
