tailieunhanh - The Paper Making Process From wood to coated paper

Over many years, the petrochemical industry has built up an effective infra- structure for processing and distributing hydrocarbon-based products. Due to reliance on imported crude oil, much of the . infrastructure is geographically located around the coastline (Fig. 9). Thus, many current processing facilities are not well situated for the collection of large volumes of plant-derived material. Where plant materials are processed in lumber mills, oil crushers, or corn wet mills, these are situated adjacent to areas of supply. A transition to more plant- derived materials will require further integration of supply and processing/ manufacturing. An example of the new infrastructure is the manufacturing facil- ity being built in. | The Paper Making Process From wood to coated paper The Paper Making Process the fifth technical brochure from Sappi Idea Exchange sappi Sappi is committed to helping printers and graphic designers use paper in the best possible way. So we share our knowledge with customers providing them with samples specifications ideas technical information and a complete range of brochures through the Sappi Idea Exchange. Find out more on our unique web site. The Paper Making Process From wood to coated paper I Introduction 2 II Wood production Wood as the raw material 3 III Pulp production Pulping process Mechanical and chemical pulp 4 Sulphate and sulphite process 4 Intermediate pulp types 5 Pulp bleaching 5 IV Paper production Raw materials Preparation of the fibres in the refiner 6 Additional raw materials for the base paper 6 Paper machine Suspension at the headbox 7 Sheet formation in the wire section 7 Filtration Thickening 7 Twinformer and Gapformer 8 De-watering in the press section 9 Dryer section 9 End group 9 Surface treatment Size press 10 Film press 10 V Coating The benefits of coated paper 11 Coating machine 11 Coating preparation 12 Vl Finishing Calender 12 Rewinder 13 Slitter rewinder 13 Cross cutter 13 Guillotine 13 VII Packing and storage 14 VIII Paper properties 15 IX Concluding remarks 16 Obtain a printed version of this brochure from the Idea Exchange at