The Difference Between Kraft Paper Bags of Different Materials

March 03,2022

Today, with more and more people calling for environmental protection, biodegradable kraft paper bags are widely used. Kraft paper bags made of kraft paper are not only environmentally friendly, reusable, but also strong and durable. Today, let's explore kraft paper together!

 

What are the characteristics of kraft paper?

 

As a packaging paper, kraft paper is characterized by being very tough and water-resistant, the color of the paper is yellow, and its uses are also very extensive. Among many uses, it is very frequently used as a packaging bag, so what is the main raw material of kraft paper?

 

Wood Pulp Kraft Paper v.s. Recycled Kraft Paper

 

As we all know, there are many types of kraft paper, which can be divided into two categories according to the material: wood pulp kraft paper and recycled pulp kraft paper (that is, recycled kraft paper). So, what's the difference between the two? What is wood pulp kraft paper? What is recycled kraft paper?

 

Wood pulp kraft paper

 

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✔️What is wood pulp kraft paper?

 

Wood pulp kraft paper is made from sulfated softwood pulp, which is beaten and then made on a Fourdrinier paper machine. Wood pulp kraft paper is also called pure wood pulp kraft paper or all wood pulp kraft paper, that is to say, the wood pulp it uses is made by beating wood and does not contain recycled pulp or other pulp.

 

✔️What are the characteristics of all wood pulp kraft paper?

 

The characteristics of all-wood pulp kraft paper are made of kraft softwood pulp made by beating wood as raw material. Wood pulp kraft paper commonly used in daily life include Samsung/Xiaomi mobile phone boxes, KFC, Starbucks takeaway bags, kraft paper coffee cups, clothing handbags, etc.;

 

Recycled Kraft Paper

 

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✔️What is recycled kraft paper?

 

Recycled kraft paper is made from waste paper, which is then smashed, deinked, and decolorized. The pulping of waste paper is produced through a variety of processes. Different grades of waste paper will be sorted and packaged when recycled by waste paper packaging plants. Yellow cardboard and carton waste paper will have longer fibers and are mostly used to produce packaging paper, linerboard, recycled kraft cardboard, corrugated base paper, etc.

 

✔️What are the characteristics of recycled pulp kraft paper?

 

The characteristics of recycled pulp kraft paper use waste paper as raw material, the waste paper pulp has short fibers, poor physical indicators, low tensile strength and bursting strength, rough surface, many black spots and impurities, and some recycled kraft paper will have an unpleasant odor and cannot be used for food packaging, and contains heavy metals, fluorescent agents and other toxic and harmful substances, so recycled pulp kraft paper is mostly used in product packaging boxes and envelopes, etc.

 

What is the difference between wood pulp kraft paper and recycled kraft paper?

 

After the above comparison, we concluded that there are three main differences between wood pulp kraft paper and recycled kraft paper:

 

  • Surface smoothness, black spots and impurities;

 

  • The physical index is good or bad, that is, the difference in paper index such as tensile force and bursting resistance is large;

 

  • Different raw materials have different uses of the products made after production and processing, so you can also judge by smelling the smell of paper.

 

In conclusion

 

Wood pulp kraft paper and recycled kraft paper have their own markets, but there are differences in use. Food packaging will definitely use wood pulp paper or wood pulp kraft paper, while those with low-grade or low packaging requirements use recycled pulp kraft paper for recycling.

 

Therefore, when cheap wholesale kraft paper bag, you'd better distinguish its material to avoid unnecessary misunderstandings. We are one of the leading paper kraft bags manufacturers in China, any need, please feel free to contact us.

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