Processing of paper
.The paper starting from the wood pulp fibers to for get out. Then the pulp to mixed with additives in different ratios to adjust the properties of paper to meet demand.Then the processing use. The production process is divided into 5 steps. In the order according to when the real inside the factory is as follows:
.1. Production of pulp (Pulping)
2. Preparation of water membrane (Stock Preparation)
3. Making a sheet of paper (Papermaking)
4. Improving the properties of paper, while the second sheet. (Web Modification)
5. Processing pulp
.The purpose of the main production. To separate the fibers out of the องคื another ingredient of wood. Production of pulp can in many ways, either by means of chemical or mechanical properties in some cases may be applied through blanch.Process of pulping and bleaching
.Processing of tissue (Pulping Process)
membrane has many kinds, call up to manufacturing process, which contains various forms of energy used. Including thermal energy, chemical energy, and mechanical energy
.Mechanical pulp production (Mechanical Pulping Process). Using mechanical energy coupled with thermal energy in the fiber separation. By the rod / piece of wood is uploaded, which acts to grinding grinding and cutting to pieces of wood pieces ละเอียดเป็น wood pulp.Or mechanical pulp yield pulp during percent more than 85 wood pulp grinding has the quite rough softener. The fibers are mainly not complete, lack and cut into pieces. There are also a group of lines ใยป stay.Fiber spray (fines), which is caused by the rupture of fiber,The single mode fiber (individual fiber) is not complete,Tied for fiber (bundle of fiber) which consists of multiple fiber line cling together as a bundle. This type of tissue when used as raw materials in this paper. According to features of composition 3. Capillary fibers will add a feature in opaque.And still have a lot to eat residues are very much. The bond between fiber low back color fast, tissue type is not suitable to make paper, get high strength or keep long, cheap. For cheap publications such as newspapers.Chemical pulp production (Chemical Pulping Process) manufacturing process is used to nod conjunctiva m married, chemical and thermal energy in the fiber separation. The piece of wood will be sent to me boiled pulp (digester) chemical and heat to melt the lignin.There are many kinds of chemical pulp called by the chemicals used in production, such as pulp, sulfate, sulfite pulp and pulp soda chemical pulp yield of approximately 40 looks soft. The color is dark, fibers, which are complete.Because can develop potential within the fiber can be used widely. Suitable for both the รับแรง and for communication, if used in the work force. Such as the paper packaging to bleach.Pulp and paper (Secondary Pulp) in the current paper (reclaimed and waste paper) count as a source of fiber, an important source. Some of the fiber paper used both inside and outside the country as the raw material in the production of paper.Secondary pulp tribute tissue are not used to make paper called virgin pulp fibers from waste paper of this type เรียว่า recycled fiber. Because of the paper through the use of many types, for example, if a paper through the various printing(deinking) then proceeded to purify (bleaching), white, for the production of paper or paper settle, but if the manufacture of paper sticky. Brown paper or no need to remove the ink.Manufacture of printing and writing paper that inner membrane cardboard or paper etc.
.The bleaching (Bleaching)
bleaching pulp is made with white suit to use paper to communicate various is divided into 2 methods
how to eliminate the bleaching pulp lignin. (removing lignin)
.How to change the color of pulp bleaching in downward) in the form of colorless (bleaching chemical pulp bleaching using lignin) to chemical reaction with big Nin and get rid of lignin. Purification of this there are many up when generally have since 3-6 step (CEH CEDEP CEOP).
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