Lightweight paper is a thin, flexible paper that is commonly used for packaging, printing, and writing. Due to its special paper structure and properties.
Detection performance
Its detection needs to pay attention to the following main performances:
Thickness and density: The thickness and density of lightweight paper will directly affect its stability and use effect. Detection of thickness and density can be carried out by measuring indicators such as paper thickness, density and basis weight.
Paper Strength: Light weight paper needs to have a certain strength to ensure its stability and durability. The detection of strength can be carried out by measuring the tensile strength, tear strength, folding endurance and other indicators of paper.
Paper flexibility: Light weight paper needs to have a certain degree of flexibility to ensure it is suitable for use in areas such as packaging and printing. The detection of flexibility can be carried out by measuring the number of folds and bending of the paper.
Flatness: Lightweight paper needs to have a certain flatness to ensure the stability and printing effect during printing. The detection of flatness can be carried out by measuring the smoothness of the paper surface, the height of hairiness and the convexity of the board.
Abrasion resistance of paper: light paper needs to have a certain degree of abrasion resistance to ensure its durability and use effect. The detection of abrasion resistance can be carried out by measuring the index of paper abrasion and surface hardness.
Air permeability of paper: Lightweight paper needs to have a certain degree of air permeability to ensure that it is suitable for use in packaging and other fields. The detection of air permeability can be carried out by measuring the air permeability and water vapor permeability of paper and other indicators.
Printing performance of paper: Lightweight paper needs to have certain printing performance to ensure the printing quality of printed matter. The detection of printing performance can be carried out by measuring the water absorption, ink absorption, printing clarity, color reproduction and printing pollution resistance of paper and other indicators.
Environmental protection of paper: Lightweight 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 .
Scope of application: Lightweight paper has a wide range of applications, and lightweight paper for different purposes needs to have different performance requirements. The scope of application can be tested by measuring the applicable environment of paper, applicable packaging items, applicable printing process and other indicators.
Machinability: Lightweight paper usually needs to be processed by cutting, folding, punching, etc., so it needs to have a certain degree of machinability. The detection of processability can be carried out by measuring the performance change and loss of paper in different processing processes.
The above performance indicators are the key content of light paper testing, and different use requirements and standards will also affect the testing standards and methods of paper.
