Manufacture of recycled pulp. Manufacture of recycled pulp. Recycled paper
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1 Collection of used paper Recycled fibers Paper use by final consumer Conversion and printing Paper manufacturing Recycled paper Arjowiggins know-how Copyright 2014 Arjowiggins and its licensors. All rights reserved. #1
2 After collecting office papers, they are sorted, de-inked and bleached without chlorine. The pulp is then sent to mills making paper. Discover the steps involved in the manufacture of recycled paper. Raw materials Office paper, photocopy paper, laser printing, white archives. Pressing Draining of the pulp into a pulp press. Pulping Blending of old papers into the soap-water and mixing into a turbine to separate fibres, ink and other components. Drying The water remaining in the pulp evaporates as it passes through the drier. Screening Extraction of plastics, staples, glues, dust, etc. through cyclonic purification and sieving. Cutting De-inking Ink extraction through flotation : the hydrophobic ink particles stick to air bubbles, formed thanks to the added soap, and brought to the surface by aspiration. Packaging before shipment Whitening : cleaning in 2 steps 1) with hydrogen peroxide and a period of time spent in a retention tower. 2) with sodium hydrosulfite. Copyright 2014 Arjowiggins and its licensors. All rights reserved. #2
3 The basic principle is to mix pulp with a lot of water to produce a smooth liquid solution. Water is then eliminated by the cheapest and less energy-consuming processes possible (gravity, suction, pressure, drying) to form a sheet of paper. Discover the different stages of the coated paper making process. Pulp preparation Refining Wet section Pulp transformation The coating Drying The jumbo reel The final coating Whitening Copyright 2014 Arjowiggins and its licensors. All rights reserved. #3
4 Pulp preparation The fibres are mixed with water in a «pulper». There are two types of cellulose fibres : 1) Long fibres (hardwood) 2) Fibres (softwood) both sourced from sustainable managed forests Cellulose fibres Mix water + pulp Copyright 2014 Arjowiggins and its licensors. All rights reserved. #4
5 Refining The fibrous mixture obtained contains 97% of water. Before the machine stage, it is refined and purified. Cellulose fibres Refining purification Copyright 2014 Arjowiggins and its licensors. All rights reserved. #5
6 Wet section This mixture or pulp is poured from the "head box" onto a canvas called the wire. The fibres mat together on the wire and form the sheet, once the water has been drained off. The wire Recycled water Copyright 2014 Arjowiggins and its licensors. All rights reserved. #6
7 Pulp transformation The pulp becomes a fibrous self supporting mat. This paper mat is fed through the press section where it is pressed between two absorbent cylinders. Presses + absorbent cylinders Copyright 2014 Arjowiggins and its licensors. All rights reserved. #7
8 Whitening The water still remaining in the paper evaporates in the drying section as it goes through a set of heated cylinders. The now dry paper mat is called the base paper. Drying through heated cylinders Copyright 2014 Arjowiggins and its licensors. All rights reserved. #8
9 The coating To improve the surface of the base paper, it receives an initial coating on the size-press of the paper machine. The coating (Size-press) Copyright 2014 Arjowiggins and its licensors. All rights reserved. #9
10 Drying The base paper goes through yet another drying section to eliminate the water added by the coating. Drying through heated cylinders Copyright 2014 Arjowiggins and its licensors. All rights reserved. #10
11 The jumbo reel At the end of the paper machine, the base paper is wound on the jumbo reel. Depending on the product and the grammage, this reel can weight tonnes. The jumbo reel (15-20T) Copyright 2014 Arjowiggins and its licensors. All rights reserved. #11
12 The final coating After a quality check of the base paper, the final coating is applied on the coating machine. The coat mainly consist of mineral pigments, binders (synthetic latex, etc) and colour additives. Copyright 2014 Arjowiggins and its licensors. All rights reserved. #12
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