Kraft paper is a common industrial paper material. Due to its high strength and wear resistance, it is widely used in the production of packaging boxes, bags, book covers, handbags and other fields.
Detection performance
It needs to detect the following main properties:
Strength: Kraft paper needs to have extremely high strength to ensure that it is not easily damaged or broken during the process of making boxes, bags, etc. The detection of strength can be carried out by measuring the tensile strength, flexural strength, compressive strength and other indicators of paper.
Abrasion resistance: Kraft paper needs to have extremely high abrasion resistance to ensure that it is not easily damaged or worn during the process of making book covers, handbags, etc. The detection of wear resistance can be carried out by measuring the coefficient of friction of the paper surface, the degree of wear resistance and other indicators.
Air permeability: kraft paper needs to have a certain degree of air permeability to ensure the quality and shelf life of the packaged items. The detection of air permeability can be carried out by measuring the air permeability, porosity and air permeability coefficient of the paper.
Water absorption: Kraft paper needs to have a certain degree of water absorption in order to play a certain buffer 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 paper and other indicators.
Environmental protection: Kraft paper needs to meet environmental protection standards, contain no harmful substances, and have no pollution to the environment. The detection of environmental protection can be carried out by measuring indicators such as 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 packaging 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 and other indicators.
Packaging performance: The packaging performance of kraft paper is one of its important performance indicators, including packaging tightness, dimensional stability and stacking stability. The detection of packaging performance can be carried out by measuring the thickness, toughness and surface smoothness of the packaging paper .
Appearance quality: Since kraft paper is usually used for products with high appearance requirements, its appearance quality is also a very important indicator, which requires appearance inspection, such as surface flatness, surface gloss, surface smoothness, and no surface defects.
The above performance indicators are the key content of kraft paper testing, and different use requirements and standards will also affect the paper testing standards and methods.
