Materials and Production Techniques for Kraft Tape!

Kraft tape is a commonly used adhesive tape that uses special kraft paper as its base material and is coated with adhesive glue. Kraft tape has good durability, tear resistance, and moisture resistance, and is widely used in packaging, sealing, fixing, and labeling. In this article, we will describe in detail the raw material composition and manufacturing process of the kraft paper used in kraft tape.

 

I. Raw material composition of kraft paper

 

Kraft paper is a type of paper made of plant fibers, resins, and other additives. Unlike typical white paper, kraft paper's main component is bark, giving it stronger tensile strength and durability.

 

Bark

The raw material for kraft paper is cellulose extracted from bark. Pine, spruce, and fir bark are commonly used.

 

Resin

To enhance the durability of kraft paper, manufacturers often add resin, which can increase paper hardness, water resistance, and wear resistance. The most common resin is rosin, and other common resins include spruce resin and gum.

 

Other additives

During the production of kraft paper, manufacturers add some chemicals to improve the quality and performance of the kraft paper. For example, they may add calcium carbonate or talc to improve the strength and water resistance of the kraft paper. Dyes or white pigments may also be added to give the kraft paper different colors or whiteness.

 

II. Manufacturing process of kraft paper

 

The manufacturing process of kraft paper is relatively simple and can be divided into the following steps:

 

Pulping

The bark is placed in a large tank, enough water and some chemical agents are added, and it is stirred for several hours to separate the cellulose from the bark.

 

Beating

The stirred cellulose is mixed with water and beaten into fine fibers using a beater. Then, resin and other additives are added and mixed uniformly.

 

Papermaking

The mixed fibers and chemical agents are made into paper using a papermaking machine. This step needs to be carried out under high temperature and pressure to ensure that the fibers and additives can be fully combined. The resulting paper needs to be pressed, dried, and cut several times to ensure a certain thickness and toughness.

 

Coating

The finished kraft paper needs to be coated with adhesive to make it usable as a tape. The most commonly used adhesives are rubber and acrylic, and the coating process can be completed with equipment such as a roller coater or spray coater.

 

Cutting

The kraft paper coated with adhesive needs to be cut into different sizes to make tapes. This can be done with equipment such as a slitting machine or die-cutting machine.

 

Packaging

Finally, the finished kraft paper tape needs to be packaged. It is usually rolled to a certain length, put in a plastic bag, and then packed in a cardboard box or other packaging container. This helps to maintain the quality and shape of the tape, making it easy to transport and use.

 

III. Applications of Kraft Paper Tape

 

Kraft paper tape has a wide range of applications, including:

 

Packaging

Kraft paper tape is commonly used for sealing and securing packages in shipping and storage.

 

Fixing

Kraft paper tape can be used to fix items in place, such as for painting or crafting projects.

 

Labeling

Kraft paper tape can be used for labeling and organizing items, such as in a warehouse or office setting.

 

Bookbinding

Kraft paper tape can be used for bookbinding, as it is strong and durable.

 

In conclusion, kraft paper tape is a commonly used tape that has good durability, tear resistance, and moisture resistance. Its raw material composition includes tree bark, resin, and other additives, and its manufacturing process includes stirring, pulping, papermaking, coating, cutting, and packaging. Kraft paper tape has a variety of applications, including packaging, fixing, labeling, and bookbinding.