Study on the Technology of Benzene-free Solvents and Printing In Food Packaging and Printing (3)

New solvent research principles and factors to be considered: From the above-mentioned large survey data and process requirements, it is shown that new benzene-free solvents must obey the printing speed of the printing press; the structure of the drying system of the printing press; characteristics of the printing materials; indoor Considering temperature and relative humidity and good solubility of ink, the developed new solvent should have good dissolving power without any mechanical impurities and free acids, alkalis, and moisture; the solvent cannot corrode the printing plate; the solvent cannot It chemically reacts with the constituents of the ink; the solvent has a small odor and is less toxic, and the volatile gas must meet the requirements of environmental protection. For this reason our expert team started from 2000 based on:

1. Three-dimensional dissolution parameter theory.
2, Hansen dissolved ball theory 3, organic solvent activity coefficient.
4, the principle of solvent polarity.
5. The theory of viscosity calculation of mixed solvents.
6, "Azeotrope" principle and other principles under the guidance of our own research and development of "chemical solvent digital model geometry substitution method" with the help of numerous formula adjustment, and tens of thousands of applications of the experiment , Successfully developed a new generation of all-purpose "non-benzene series, halogen-free hydrocarbons" ink gravure printing solvent. After dozens of corporate trials, it has received good results. The new benzene-free ink special solvent has the following characteristics:

1. Good dissolving power of ink and enhancing ink uniformity;

2, enhance the adhesion of ink to the printed substrate;

3, increase the brightness of the ink color;

4. When the oven is used, the solvent can quickly evaporate, and the harmful substances in the original ink can be taken away during the volatilization process to reduce the residue of harmful substances.

5, print does not discount, not anti-sticking;

6. The odor left by the printed product without solvent;

7, to reduce air pollution in the workshop, improve the work environment of the workshop, to prevent workers from suffering from benzene series;

8, moderate dry speed, can be an excellent adjustment of the drying performance of the ink, to avoid the dry problem due to sticky, quit, deinking, word line pattern incomplete defects and other ills;

9, has a good adaptability to various speed printing presses;

10, without on-site deployment, simplify the production process, reduce the volatile loss of about 20% when the solvent deployment in production, effectively save production costs;

11, to ensure the safety of both employers and employees. Because the harmful residues of food packaging mainly come from the packaging materials, especially the benzene, n-hexane, and halohydrocarbons used in the packaging printing process, and the harmful chemicals used as the main raw material ink and solvent. Such inks and solvents that are rich in harmful substances will cause acute and chronic poisoning of workers during the production process, affecting the cooperative relations between the employers and employees, and also seriously affecting social stability.

12. The lack of residual substances in the printed matter does not cause any transfer of food contamination, ensuring food hygiene and safety.

In 2004, the company's product "No Benzene Series Ink Solvent for Special Purpose Solvents" was successfully researched and tested by a number of national authorities. All performance indicators have met or exceeded national standards.

1, toxicity test:

After the "Chinese Center for Disease Control and Prevention Institute of Occupational Hygiene and Poison Control" toxicity test, the test concluded that the product is actually non-toxic grade. (Specific inspection information see attachment)

2, component inspection:

The "National Building Materials Testing Center" component test, the content of benzene in the triphenyl content is zero, toluene + xylene content: 0.03-0.06%.

3, residue inspection:

The "National Packaging Products Quality Supervision and Inspection Center (Chengdu)" applies the PET and BOPP inks produced by our company using Toyo Ink Co., Ltd., Yehji Ink Co., Ltd. and Mika Ink Co., Ltd. to our company's new ink special diluents for sampling in normal printing production. The test result is 0.7 mg/m2.

I am very pleased to be able to discuss the food packaging and printing technology together with the experts and colleagues attending the meeting today. On behalf of Foshan Baojule Chemical Technology Co., Ltd., I would like to express my sincere gratitude to all of you and the organizers. At the same time, in particular, to Yeji Ink (Zhongshan) Co., Ltd., Jiangmen Toyo Ink Co., Ltd., Zhongshan Meijia Printing Material Co., Ltd., Nanhai South Packaging Materials Co., Ltd., Foshan Baoshengyuan Packaging Materials Co., Ltd., Foshan East The leaders and technicians of Packaging Materials Co., Ltd., Santa Ana Foods Co., Ltd. and other units expressed their sincere gratitude to us for supporting and helping us in the research and development of new “non-benzene-based ink special solvents” for many years.

Because without your selfless help we cannot achieve today's results! In the food packaging industry, which has a wide range of applications and a very high technological content, we have only made a preliminary exploration and research. We hope to continue to receive more help and support from experts, peers, and companies that support us in the days to come.




(Author: Foshan-Habitat Lok Chemical Technology Co., Ltd. Chief Engineer Wei Xiaolan)