The low-quantity coated paper is a coated printing paper containing mechanical pulp, with a coating weight of 7 to 12 g/m2 (on one side) and a basis weight of 52 to 70 g/m2. It is suitable for rotary gravure and thermosetting rolls. Offset printing. The key technology of low-quantity coated paper is still high smoothness and opacity under low quantification and low coating amount. It is used in magazines, sales catalogs and supermarket DMs with a large number of advertisements and color pictures. Wait. Its good finish and whiteness give the name "advertiser-specific paper" for low-weight coated paper.
(1) Selection of fiber raw materials
The choice of fiber raw material has a great influence on the quality and cost of low-quantity coated papers. Its conventional raw material composition is 40% of softwood kraft pulp (reinforcing pulp) and 60% of machine pulp paper, of which the machine paper is ground. Stone milled wood pulp (SGW), pressure ground wood pulp (PGW), thermomechanical pulp (TMP), and in some cases, chemical thermomechanical pulp (CTMP), alkaline hydrogen peroxide mechanical pulp (APMP or Deinking Pulp (DIP) The development of the raw material composition focuses on the optimization of the beating of the chemical pulp and the new concept of pulping of the mechanical pulp.
(2) Coating Preparation
For low weight coated paper, the uniformity of the coating thickness is the most important factor affecting the print quality. In order to obtain a coated low-quality coated paper, a good base paper is first required, and the quality of the coated paper is good. The base paper accounts for 80% of the factors, such as the smoothness and absorbency of the base paper. Significant factors of quality; Secondly, the coating method is also very important. The choice of pigments and adhesives in the coating formulation plays an important role in improving the surface strength and opacity of the coating. Almost all light-coated papers are produced by in-machine coating. The coating method is metering size press (film coating). Pre-calendering can be enhanced before coating. The finishing method is soft roll calendering or super calendering.
Super calendered paper production features
Supercalendered paper refers to paper that contains fillers added to the sheet and super-calendered to give the sheet a good printing performance (good smoothness and glossiness, etc.). Super calender paper, also known as magazine paper, is mainly used for printing advertising inserts, catalogs and magazines. It was first developed by Finland in the early 1980s. Its main feature is mechanical pulp as the main raw material, filler content is high, generally about 25%, the highest up to 35%, in the late drying period highlight the role of super calendering, containing more filler paper through the super calender Grinding and calendering to achieve higher smoothness and gloss. The supercalendered paper has a high ash content and its quantitative range is between 40 and 80 g/m2, with a maximum of 52 to 60 g/m2. Super-calendered paper is currently not produced in large scale in China and is considered as Chinese paper. The last cake on the market is between newsprint and low weight coated paper.
(1) Selection of fiber raw materials
The choice of fiber raw material has a great influence on the quality and cost of low-quantity coated papers. Its conventional raw material composition is 40% of softwood kraft pulp (reinforcing pulp) and 60% of machine pulp paper, of which the machine paper is ground. Stone milled wood pulp (SGW), pressure ground wood pulp (PGW), thermomechanical pulp (TMP), and in some cases, chemical thermomechanical pulp (CTMP), alkaline hydrogen peroxide mechanical pulp (APMP or Deinking Pulp (DIP) The development of the raw material composition focuses on the optimization of the beating of the chemical pulp and the new concept of pulping of the mechanical pulp.
(2) Coating Preparation
For low weight coated paper, the uniformity of the coating thickness is the most important factor affecting the print quality. In order to obtain a coated low-quality coated paper, a good base paper is first required, and the quality of the coated paper is good. The base paper accounts for 80% of the factors, such as the smoothness and absorbency of the base paper. Significant factors of quality; Secondly, the coating method is also very important. The choice of pigments and adhesives in the coating formulation plays an important role in improving the surface strength and opacity of the coating. Almost all light-coated papers are produced by in-machine coating. The coating method is metering size press (film coating). Pre-calendering can be enhanced before coating. The finishing method is soft roll calendering or super calendering.
Super calendered paper production features
Supercalendered paper refers to paper that contains fillers added to the sheet and super-calendered to give the sheet a good printing performance (good smoothness and glossiness, etc.). Super calender paper, also known as magazine paper, is mainly used for printing advertising inserts, catalogs and magazines. It was first developed by Finland in the early 1980s. Its main feature is mechanical pulp as the main raw material, filler content is high, generally about 25%, the highest up to 35%, in the late drying period highlight the role of super calendering, containing more filler paper through the super calender Grinding and calendering to achieve higher smoothness and gloss. The supercalendered paper has a high ash content and its quantitative range is between 40 and 80 g/m2, with a maximum of 52 to 60 g/m2. Super-calendered paper is currently not produced in large scale in China and is considered as Chinese paper. The last cake on the market is between newsprint and low weight coated paper.
Modern Dining Chair,Modern Wood Dining Chairs,Modern Metal Dining Chairs,Modern Velvet Dining Chairs
ZHEJIANG NEW WOOD MATERIAL TECHNOLOGY CO.,LTD , https://www.newmaterialfurniture.com