Zhejiang Oulun Electric Co., Ltd

Add: No.17 Tangmei Road, Yuhang Economic Development Zone, Yuhang District, Hangzhou, Zhejiang, China

Contact us: Lily Shen

Tel: 86-571-89301300

Mobile: 86-15957119041

Email: sales8@oulungroup.com

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The dehumidifier provides great convenience for the control of the environment temperature and humidity in the paper industry
Jan 05, 2018

The dehumidifier provides great convenience for the control of the environment temperature and humidity in the paper industry

Now the workshop on the environment have become increasingly demanding, especially for more stringent control of the humidity, some parts even manufactured parts will pass the humidity effectively, so it is important for the workshop dehumidification, dehumidification machine is common in a workshop in the use of tools, of course also must master the correct way to use. This desiccant will be more effect.


At present, the technology of packaging and printing in China is becoming more and more complex. Most of the soft packages are single-sided coated paper. Often used white cardboard and transfer laser paper, especially high-grade cigarettes, will adopt various combination printing methods and various anti-counterfeiting technologies. The low-grade smoke bag will also use gray bottom whiteboard. There are so many different kinds of paper with different thickness and size. During printing, they will be influenced by printing pressure and temperature and humidity. Therefore, it is necessary to ensure accuracy in the control of humidity.


The influence of environmental change on cigarette printing is mainly due to the following reasons:


1. The characteristics of paper: the lagging effect of paper water content.  The original paper A storage environment of high relative humidity, the original paper B storage environment relative humidity is low, when two kinds of paper as raw materials, spare parts of cigarette packaging printing is placed in the same environment, A will put the wet paper, B paper will absorb moisture, but when the moisture, moisture balance, paper the moisture can not be restored to the original level, the reason is the lag effect of moisture content of the paper. Knowing this feature will help us to correctly understand the relative humidity control of warehouse environment and improve warehouse management system in raw material storage work. Most cigarette printing enterprises control the paper storage environment at 20~25 degree temperature and relative humidity (60 + 5)%RH, in this environment, the storage status of paper is relatively stable.


2, paper is a very strong hydrophilic material, paper moisture absorption is the main cause of paper curl deformation. Experiments show that when the relative humidity of environment is below 80%, the moisture fluctuation is 10%, and the balance water content of paper is changed by 1%. When relative humidity exceeds 80%, its balance water content changes about 1.5 to 2%. This means that in the environment of high humidity, the slight change in humidity will increase the deformation of paper, and the damage is very strong.


3, cigarette printing from paper to finished products will have a process from paper mill, printing paper inventory, printing and processing to finished products. The time span and location of the package will have a relatively large impact. The paper in cigarette package printing before storage, paper products to adapt to a buffer zone, cigarette packaging printing enterprises of local temperature and humidity environment at that time, the warehouse storage condition is very important, need to control the warehouse environment, air temperature and humidity, the paper products during storage process of moisture absorption and emission can be adjusted in the monitoring range. Avoid the "lotus leaf edge" due to moisture absorption, because the "tight edge" caused by moisture release, and the positive and negative sides of the paper will also cause curling due to the different degree of humidity.


Zhejiang Oulun Electric Co.,Ltd

Add: No.17 Tangmei Road, Yuhang Economic Development Zone, Yuhang District, Hangzhou, Zhejiang, China

Contact us: Shen Li

Tel: 86-571-89301300

Mobile: 86-15957119041

E-mail: sales1@oulungroup.com


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