Types of Paper Bags
Paper bags are suitable for hundreds of uses, including the packaging of products such as flour, bread, animal feed, cement, etc. According to their filling system, paper bags can be classified into two main types…
- Open Top Paper Bags: Filling the bags is normally done by gravity or with manual procedures and is closed by sewing, gluing, or heat sealing.
- Paper Bags with Valves: The bag is typically filled using automatic bagging machinery. Once filled, the pressure of the bag’s contents automatically closes the charge spout. Some valves may also fold inward once the filling process is complete. If a more airtight seal is required, the valve can be supplied in heat-sealable plastic.
The product to be packaged and its leak-tightness requirements determine the type of paper bag, and in turn, the type of bag determines whether filling is done manually or automatically using bagging systems of varying sophistication.
Kraft Paper
White Paper Bag
Single ply kraft paper bag
Single-ply kraft paper bag with loops
Multilayer white paper bag
Multilayer Kraft Paper Bag
Multi-layer kraft paper bag with a block bottom and die-cut opening
, white paper bag with a block bottom
Bread Paper Bag
Paper bag with valve
Paper Bag with valve for cement
Endurance of Paper Bags
Depending on the different weights or even types of handling to which each bag will be subjected, paper bags come in different strengths, which depend mainly on the number of sheets or layers of paper they are made of, as well as the thickness of each layer.
We offer paper bags consisting of 1, 2, 3, and even 4 layers. Each of these sheets or layers can be made of Kraft paper (brown), white paper, or even plastic. Inner liners can also be added; the most common are made of polyethylene, which should always be sealed at the top in the case of automatic bagging.
Although there are some less sturdy paper bags on the market, the minimum specification should not be less than two layers, each weighing 70 grams.
Configuring Openings and Bottoms on Paper Bags
Paper bags can be made with different types of open tops (the most common are open top or valve), and different types of bottoms (the most common are gusseted, with block bottom or glued, with sealed or pinch bottom, or sewn with curled paper). In cases where a better seal is required at the bottom, an additional strip or layer of paper is incorporated at the base of the bag.
Some commonly used terms to designate some of these layouts are as follows:
/C = Sewn bottom
/2 = Open top and glued bottom
/V = With top valve
/SoS = Bottom with bellows
Other Components of Paper Bags and Sacks
Some of the sizes are available with a blank outer sheet. To preserve the goods properly, a polyethylene (PE) inner sleeve may also be included sometimes.
Paper bags can be micro-perforated so that any dust generated inside can escape through these micro-holes during the filling process. The perforations also help prevent stacked bags from shifting by keeping them from sliding against one another.
Some paper bags have loops—usually flat ones—attached to the top.
Paper bags are also for storing greasy or wet products
Some fatty products such as animal feed, cocoa, or powdered milk can stain and alter the technical properties of the paper. To avoid issues with greasy products, an anti-grease treatment can be added to the paper. Also, a polyethylene inner sleeve can be included, or a coating layer can be added to the paper to protect it.
It is also possible to use an anti-humidity paper to better protect goods such as potatoes, for instance.
Brand identification, images and logos on Paper Bags
In the same way as in the PP Plastic Bags, Paper Bags can be customized with images and logos in different colors, to better identify their contents or the brand of their manufacturer or distributor. The print finish can be glossy or matte.
Sometimes an outer layer of paper helps make the print more visible. Paper Bags can be printed by flexography or even by photographic quality BOPP printing.
Eco-friendly Paper Bags
We also have Repulpable (dissolvable) Paper Bags. These are certified for being made with water-soluble paper and glue, capable of dissolving and disappearing without leaving any residue, and therefore do not pollute.
All in Paper Bags
Are you looking for paper bags that can fulfill everything you need? We have them all in Multisac and we know they will perform the functions you are looking for in your work. All our bags are designed to meet the needs of companies in various sectors. Paper bags are ideal for packing cement, flour, and bread, among many other products. On our website, you can discover many options in various sizes for these types of bags. If none of them fit what you want, don’t worry. Contact us and we will find the best solution. The tailoring of our products distinguishes us, and we adapt to our customers’ needs.
Our paper bags are synonymous with quality and performance. We offer bags with up to three sheets of Krafty paper with glued bottoms. To better preserve the goods, we offer the possibility of including a polyethylene sleeve. As you can see, we go out of our way to provide products that deliver outstanding results.
Multisac is a company with extensive experience and a long track record. We have become true experts in manufacturing, selling, and distributing Big Bags, Small Bags, Fabrics, and other products. Over 70 years of service to our customers. That is our guarantee. Many businesses have decided to trust us and we want to keep it that way.
Discover our paper bags
As specialists in paper bags, we know they can be necessary at any time. Something that distinguishes us is that we can provide an agile and professional service. We have a large stock of our products; this allows us to offer express deliveries. We know that some things can’t wait.
We also offer the possibility of acquiring jute bags, a vegetable fiber ideal for the ventilation of the products stored. The most commonly used bags are 10-ounce bags, although 7-ounce bags are also available. They are perfect for cocoa, coffee, or seeds, among others.
This is not all. We have many for you. Discover our mesh bags, transparent bags, bags with card holders, coated, UN-approved, with top sealing… and much more!
Find what you need here.
