Important Things You Need to Know About Multiwall Paper Sack

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Important Things You Need to Know About Multiwall Paper Sack

Important Things You Need to Know About Multiwall Paper Sack


Paper has been one of the most common commodities we have seen in our everyday lives. We use tissues in the restaurant, we read books printed in paper, take notes while having a class, write letters to our beloved ones, we even pack our food in a paper-made box. probably it’s safe to say, we can’t live without paper.

There are still a lot we do not know about paper, particularly in the packaging industry. As plastic bags have swept the packaging market since 1970s, paper bag still has its place in the market even today. To avoid confusion, we will briefly introduce types of paper bag. Paper bags and shipping sacks come in a variety of shapes and sizes. Many paper bags, including lunch, shopping and grocery bags, are often made from a single layer of paper while other types are made from multiple layers.

In general, there are two types of paper bag, the first one is normal paper or single layer paper bags which are mostly seen in the supermarket, department store, convenient store that are used for packing food, and lightweight commodities. These bags are relatively breakable due to the single layer nature.

Another one is industrial paper bag, multiwall paper bag or paper sack with greater strength and higher capacity up to 50kg. Multiwall paper sacks are one of the most cost-effective packaging options available today. Made with paper, a renewable resource, it’s a sustainable option for numerous industries, including agricultural, chemical, animal nutrition, food processing and more. In this article, we will examine how industrial paper bag stands out in the packaging market and its advantages.

The kraft paper market is projected to grow from USD 15.6 billion in 2019 to USD 18.7 billion by 2025, recording a CAGR of 3.0% during the forecast period. The growing demand for kraft paper packaging solutions among various end-user industries such as food & beverages, pharmaceuticals, grocery bags, and consumer durables, and the increasing urban population across regions are factors that are driving the growth of the kraft paper market. However, various environmental mandates introduced across different regions for packaging products is projected to inhibit the growth of the market. Nevertheless, paper bag has always been the safest packaging solution especially for food and beverages, which are essential to people’s lives.

Manufacture of Paper Sacks

Wood pulp for sack paper is made from softwood by the kraft process. The long fibres provide the paper its strength and is added wet strength chemicals to even further improve the strength. Both white and brown grades are made. Sack paper is then produced on a paper machine from the wood pulp. The paper is microcrepped to give porosity and elasticity. Microcrepping is done by drying with loose draws allowing it to shrink. The paper may be coated with polyethylene (PE) to ensure an effective barrier against moisture, grease and bacteria. A paper sack can be made of several layers of sack paper depending on the toughness needed.

Advantages of Multiwall Paper Sacks

Multiwall paper sacks are an efficient and versatile packaging option made from a sustainable and renewable resource. They are available in a variety of constructions,

· Building materials such as cement or sand

· Food products such as flour or animal food

· Seeds and Grains

· Chemicals such as fertilizers or resins

The multiwall paper sacks can be custom designed to meet any specific need.

Not only are multiwall paper sacks used for a variety of industries, but they can turn into a cost-effective solution for your business. Buying our multiwall paper sacks in bulk is a great way to get quality for a lower price, and save money and time if you were packaging your own products before.

High strength and durability

Multiwall paper sack, also known as sack kraft paper, is made of porous kraft paper with high elasticity and high tear resistance, designed for packaging products with high demands for strength and durability. They are often used as shipping containers for bulk materials such as fertilizer, animal feed, sand, dry chemicals, flour and cement. Many have several layers of sack papers, printed external layer and inner plies. Some paper sacks have a plastic film, foil, or polyethylene coated paper layer in between as a water-repellent, insect resistant, or rodent barrier.

Eco Friendly

Paper bags are 100% biodegradable, reusable, and recyclable, meaning that the cost of recycling is lower than plastic bags.


Paper bags and sacks are a cost-efficient option for shippers that offer an advanced degree of customization. Because of their flexibility, they can be custom-designed to meet exact requirements and provide the highest degree of product quality protection at the lowest cost that meets normal handling, shipping and service requirements. Due to paper bags and sacks’ ability to be folded and flattened during transport, they can be shipped in small, tight spaces.

Graphics Can Be printed in Numerous Colours

As brand building becoming increasingly important among manufacturers. paper bag enhances the aesthetic appeal and provide ease of printability. paper bag with better printing quality has attracted many manufacturers turning to paper bags.

Ideal for automated bagging systems

We understand how machine can vary due to different manufacturer and we are able to customize the design of our packaging by adding a valve on the top of the bag so that it can match the valve of the filling machine. Hence, the valve bag is the most cost-efficient way since the raw material is directly filled into the bag without spillage. The fact that the easiness of paper sacks which can be reshaped into the forms in line with the need of the manufacturers, paper sacks can be fitted to almost every machine without worrying the matching problems.


The disadvantages are also evident. many products such as cement is normally produced in the form of powder which is vulnerable to the change of external environment especially moisture. Cement tends to harden when it is exposed to moisture in any form which causes unnecessary wastage of material and overall quality decline. Paper bag, compared to plastic bag, is relatively weaker in water resistance therefore causes unnecessary loss especially for those powdered products.

This problem was addressed by adding an extra layer of plastic film inside or outside the paper sacks depending on the need of products. This design to a great extent reduces the impact of external environment as well as spillage problem by adding extra protection.

Types of Paper Sacks

1. Simple brown kraft paper bags

These bags are one of the simple and common types of paper bags that you can see in most of the departmental stores and supermarkets. Mainly, they are used to store varied kinds of grocery items. They are manufactured in brown kraft paper, and the bottom is reinforced with another sheet of paper.

Well, if you talk about its durability, then it is not that durable but an individual can use it numerous times till it wears out. The best part is, the recycling process of these kraft based paper bags is very easy as its cost.

2. Pinch Bottom Sack

The pinch bottom sack is a flat or gusseted open mouth sack undefined which attributed to the multiwall paper sacks. It is thus useable even for products such as chemicals or food stuffs which have to be particularly protected during transport and storage.

The wide-top construction of the pinch bottom bag allows it to remain open while being loaded. This is because when something added to the bag, it can remain open. With a tapered end, envelope-like seal, and grease-resistant glassine lining, it makes for an ideal packaging solution for baked goods.

3. Valve Sack

As the name implies, the valve mouth on the side of the bag allows high-speed filling as well as avoiding spillage especially for powdered products such as flours and cement.

You can add extra features such as external plastic films or internal films to both valve sack and pinch bottom paper sack to make them water-resistance and even higher level of tear-resistance. And the cost of recycle is still far lower than normal plastic sacks.

SHU Packaging is a professional Multiwall Paper Bag Manufacturer. We can provide high quality paper bag to our clients through our 10+ years experience. Welcome to Contact Us for free consultation.

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