Recently, the tobacco industry has carried out an analysis and research on the VOCs of cigarette packs in the current situation. It is proposed to make corresponding amendments to the VOCs limit standards for cigarette packs. That is, on the basis of keeping the original limit of the indicators unchanged, benzene is still a single veto, while the other 15 Each item in the limit indicator of the compound is not allowed to exceed the standard, and the requirement has been tried in some areas. Faced with this new topic, how to ensure that the gravure pack meets the new VOCs limit standard requirements has become the current top priority for cigarette pack printing enterprises. According to the raw material test data, the solvent is used for the dilution and formulation of the ink, and the ink is used as a whole. Both are the main influencing factors of the VOCs content of the cigarette pack, and the ink is the most important one, which plays a decisive role in the content of the VOCs of the cigarette pack. . Therefore, the improvement of VOCs for inks is the key to solving the problem of single item exceeding the standard of VOCs in cigarette packs. In actual production, there are many factors affecting the content of VOCs in cigarette packs. For the convenience of discussion and research, we have selected a typical traditional solvent-based gravure pack (7-color printing, in which 3 main colors are large-area The color block is overprinted; the substrate is aluminized paper; the ink is a solvent-based gravure ink) as an object of improved analysis. The VOCs test data of the cigarette pack before improvement are shown in Table 1. The sum of the over-standard ratios of the 15 compounds is 18.9; after 10 to 15 days of storage, the sum of the ratios exceeds the ratio of 7 to 10, which can satisfy less than 15 times. Requests, but failed to meet the requirements of individual indicators, need further improvement. To this end, we have developed two different options in combination with production. Option 1: Improved solvent-based ink formulation The scheme is to reduce the content of each individual VOCs exceeding the standard by the improvement of the ink formulation on the basis of keeping the solvent-based ink system unchanged, so as to reach the limit value level. Since the large solid color block has the greatest influence on the content of the cigarette VOCs, the inks used for the three large solid colors are selected as the improved entry points. The improvement of the ink formulation is mainly to redistribute the solvent structure and proportion in the ink with reference to the limit indicator while keeping the ink performance unchanged. When formulating the improvement, it is necessary to make appropriate adjustments based on the measured results to achieve the best solvent ratio. After repeated adjustments and production trials of the ink formulation, the most suitable ink formulation is finally determined. The improvement scheme 1 in Table 1 is the production sampling test result. The data shows that the specific over-standard multiple is 4.4, and it is stored after 13-15 days of storage. The measured data shows that each single item meets the requirements and can achieve the intended purpose. Crushing machine, in a word, is a kind of machine to grind large size material or granule to smaller sizes or powder. Based on different request, Crushing machine can be divided into different types. Based on different material, different crushing machines are considered to meet different request.
The machine is made up of feeding material part and crush part, and dust collect part. Its coniguration is very briefness, all the parts which contact the material are made of stainless steel.
Although the improvement of ink formulation is the key, it is necessary to closely cooperate with all aspects in actual production to achieve the optimal VOCs control effect.
For grinder large material into smaller sizes, we can use coarse crusher: This machine is a hammering type mill used to pulverize drugs, chemical materials, food staff and other materials with medium hardness and low viscosity. It is suitable for the suitable for the production in middle and small-batches or sample experiments in laboratories. Materials are fed into the pulverizing chamber by a helical conveyer, and pulverized instead of other energies of other energies of revolving parts of the machine. .
The machine is simple in structure and the pulverizing chamber can be dismounted assemble and be dismounted and cleaned easily. All the parts in the chamber which contact materials are treated specially and corrosion resistama. As a result, in addition Any material ,drifted into grind chamber through feed bucket ,punched by knife edges and knife stands ,cut and grinded simultaneously by revolving and fixed knives, and due to the centrifugal force of revolving object ,automatically runs to exit
If we grind small particles to powder: The crusher mill machine is widely used in pharmaceutical, food, chemical, it can crush various of material.
Crushing Machine,Stone Crusher Machine,Mobile Crusher,Cone Crusher
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