Packaging paper is a paper material widely used in various packaging fields, including cartons, paper bags, cartons, etc.
Strength: Packaging paper needs to have a certain strength to ensure that it is not easily damaged or deformed during packaging and transportation. The detection of strength can be carried out by measuring the tensile strength, flexural strength, compressive strength and other indicators of paper.
Uniformity: Packaging paper needs to have a certain degree of uniformity to ensure its stability during printing and processing. The detection of uniformity can be carried out by measuring the thickness, density and basis weight of the paper.
Air permeability: Packaging 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: Packaging paper needs to have a certain degree of water absorption in order to play a certain buffer role in the packaging 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.
Oil resistance: Packaging paper needs to have a certain oil resistance to ensure the quality and shelf life of the packaged items. The detection of oil resistance can be carried out by measuring the oil stain penetration time of the paper, the oil stain diffusion coefficient and the oil stain resistance strength and other indicators.
Heat resistance: Packaging paper needs to have certain heat resistance to ensure the quality and shelf life of packaged items. The detection of heat resistance can be carried out by measuring the high temperature deformation resistance, heat aging resistance and thermal stability of the paper.
Environmental protection: Packaging 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: The scope of application of packaging paper involves different packaging fields, and needs to be tested and evaluated according to specific packaging requirements. The detection of the scope of application can be carried out by measuring indicators such as the applicable packaging items, applicable .
Packaging performance: The packaging performance of packaging 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.
Printing quality: The printing quality of packaging paper includes indicators such as image clarity, color reproduction and printing speed. The detection of printing quality can be carried out by checking the printing effect, line clarity, color reproduction and other indicators of printed matter.
The above performance indicators are the key content of packaging paper testing, and different use requirements and standards will also affect the testing standards and methods of paper.