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Absorbency and Porosity:
Base paper should have controlled and consistent levels of absorbency and porosity. These characteristics affect how well the paper can hold the melamine resin during the impregnation process.
Tensile Strength:
Tensile strength is the measure of the paper's resistance to being pulled apart. Base paper needs to have sufficient tensile strength to withstand the mechanical stresses during the manufacturing process, including impregnation, drying, and curing.
Basis Weight (Grammage):
Basis weight refers to the weight of the paper per unit area. The correct basis weight is important to ensure that the final melamine impregnated paper has the desired thickness and density.
Smoothness:
A smooth surface is essential for achieving high-quality printing results and uniform impregnation of the paper with the melamine resin.
Uniformity and Consistency:
Base paper should exhibit uniform properties throughout its surface and across different batches. This consistency ensures that the final product has consistent quality and performance.
Moisture Resistance:
Base paper should have controlled moisture resistance to prevent it from absorbing moisture unevenly during the manufacturing process, which could lead to warping or other issues.
Low Ash Content:
Ash content refers to the amount of inorganic material present in the paper. Low ash content is important to prevent unwanted contaminants in the final product.
Chemical Compatibility:
Base paper should be chemically compatible with the melamine resin and any additives used in the manufacturing process. Compatibility ensures proper impregnation and bonding.
Heat Resistance:
Base paper should be able to withstand the elevated temperatures used during drying and curing without undergoing excessive deformation or degradation.
Printability:
If the base paper is intended to be printed with decorative designs or patterns, it should have suitable surface characteristics for high-quality printing results.
Dimensional Stability:
Base paper should exhibit minimal dimensional changes when exposed to changes in humidity or temperature. This stability prevents the final product from warping or distorting over time.
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