Packaging is “a silent seller” of the goods. There are more and more producers who think about the design of their product for the customer to choose it among other products in supermarket. A bag with a stable bottom – doy-pack – is a beneficial positioning of product and it is very easy-to-use for the customer.

1. Quality Concerns of Doypacks
Packaging is “a silent seller” of the goods. There are more and more producers who think about
the design of their product for the customer to choose it among other products in supermarket.
A bag with a stable bottom – doy-pack – is a beneficial positioning of product and it is very
easy-to-use for the customer.
Doypacks also go by the name of stand-up pouches. they obtain more and more customers and
manufacturers favorite, because they are convenient:
 reclosable by adding a zipper or spout
 easy to be opened, by adding a tear notch or perforation
 display your products and maximize shelf space
 shape it in any way without high additional costs
 Because of small weight and capacity the costs for transportation and storing are less.
A bag with a stable bottom consists of two-, three- or four- layered materials whose thickness may
be different (from 70 to 120 mm).
Inner layer is made of polyethylene and it provides the resistance to the content of the package
and it is also thermo-welding layer. Outer layer is made of polypropylene ( BOPP) or lavsan( PET),
it is very convenient for deep or flexographic printing. Aluminum foil is used for the medium
layer .This layer is high-barrier, it does not pass light and moisture inside what is very important
for organic coffee, spices, sauces, juices, etc.

2. Based on the widely usages and constituent of Doypacks, quality control of doypacks should be
included but not limited to:
 Thickness of each layer plastic film and laminated films
 Heat Seal property of inner layer material films
 Barrier property of medium layer for Moisture, oxygen and other gases
 Ink Abrasion Property on printing layer
 Peel strength among each layer
 Lock and open force of spout if any
 Package integrity
 Coefficient of Friction for piling up and filling
In some way, quality control is not to increase the product cost but decrease the production cost.
Here I want to show you a diagram about Optimum Packaging Cost:
From this chart, you will we should keep our product in an Optimum packaging system, which
needs us control the product quality in some extent. But how to measure and make sure the
proper properties of doypacks, I am sure this is confusing many manfacurers of products and
doypacks. Do you there is a company named Labthink Instruments Co.,Ltd, which professionally
R&D and manufacture the flexible packaging testing equipment. They can give you all the
solutions for your doypack. to contact them, you can write an email to trade5@labthink.cn or visit
their website and leave a message to them about your requirement.