Kraft paper is a common industrial paper material, because of its high strength and wear resistance, so it is widely used in the production of packing cases, bags, book covers, handbags and other fields.

Performance of detection
It needs to detect the following major performances:

Strength: kraft paper needs to have high strength to ensure that it is not easy to be damaged or broken in the process of making packing cases, bags and so on. Strength detection can be carried out by measuring the tensile strength, flexural strength, compressive strength and other indicators of paper.

Wear resistance: kraft paper needs to have high wear resistance to ensure that it is not easy to damage or wear in the process of making book covers, handbags and so on. Wear resistance detection can be carried out by measuring the friction coefficient of the surface of the paper, wear resistance and other indicators.

Air permeability: kraft paper needs to have a certain air permeability, so that the quality of packaging goods and shelf life. The detection of air permeability can be carried out by measuring the permeability, porosity and permeability coefficient of the paper.

Kraft paper needs to test properties and test methods

Water absorption: kraft paper needs to have a certain water absorption, so as to play a certain buffering role in the production process. The detection of water absorption can be carried out by measuring the moisture content, water absorption speed and water absorption of the paper.

Environmental protection: kraft paper needs to meet environmental protection standards, does not contain harmful substances, no pollution to the environment. The detection of environmental protection can be carried out by measuring the volatile organic compounds, heavy metals, chloride ions and fluorescent whitening agents of paper.

Scope of application: Kraft paper has a wide range of applications, involving the production of packing boxes, bags, book covers, handbags and other fields, which need to be tested and evaluated according to specific application requirements. The detection of the scope of application can be carried out by measuring the applicable environment of the paper, the applicable product type and the applicable processing technology.

Packaging performance: The packaging performance of kraft paper is one of its important performance indicators, including packaging tightness, dimensional stability and stacking stability. The inspection of packaging performance can be carried out by measuring the thickness, toughness and surface flatness of the wrapping paper.

Appearance quality: because kraft paper is usually used for products with high appearance requirements, its appearance quality is also a very important index, which needs to be tested for appearance, such as surface flatness, surface gloss, surface smoothness, surface defect-free and other indicators.

These performance indicators are the key content of kraft paper detection, different use requirements and standards will also affect the detection standards and methods of paper.