Will the pattern printed on the food packaging bag pollute the food?
Today, Xiaobian wants to share with you here, about 'what is the pattern on the food packaging bag? Will it pollute food?
'I believe everyone will have similar problems, so let's analyze them.
'Food is the most important thing for the people'. Food in food, clothes, shelter and transportation accounts for a large part of our daily expenses.
In the supermarket shopping center, there are too many food packaging bags to see.
In addition to the information stipulated by the state, such as the date of production and the origin of raw materials, packaging bags are also important tools for merchants to sell to a large extent.
Exquisite food packaging bags often attract more customers to buy.
So how are these beautifully designed patterns printed?
In fact, these patterns are also printed with ink, so there will be residual problems.
The ink on the surface of food packaging bag material consists of pigment, crosslinking agent, solvent and auxiliary agent.
Among them, organic solvents and heavy metal elements are harmful to human body.
Solvents used in gravure printing inks generally include butanone, xylene, toluene, butanol, etc. Especially butanone, the residual smell is very strong.
Although most of these solvents can be removed by drying, the residual solvents will migrate to food and endanger human body. These residual solvents are brought into the compounding process.
After compounding, it is more difficult to run away and will slowly migrate and penetrate.
Therefore, solvent residue must be kept to a minimum.
In order to avoid and solve various problems existing in benzene soluble ink, environmentally friendly ink came into being and began to be widely used in various countries.
Why is it named environmentally friendly ink?
This is because this series of inks will not pollute the environment during the production and use process, nor will it cause physical injury to the user, nor will it pollute the food in the food packaging bag.
At present, there are generally three kinds of environmental protection series inks widely used in China: 1. Water-based ink (Water-Based ink)
It is mainly made of water-soluble resin, organic pigment, solvent and related additives through composite grinding.
Water-based ink is currently used in most flexographic packaging and printing at home and abroad.
Water-based ink does not contain volatile organic solvents, which can not only reduce the toxicity of printing residue, but also prevent fire due to static electricity contact with flammable solvents. 2. Ultraviolet (UV)
Curing Ink the curing process of ultraviolet curing ink is a photochemical reaction process, I . e. under the action of ultraviolet energy, the prepolymer cures into a film in a very short time, in addition to curing the surface of the ink, ultraviolet rays can penetrate deep into the liquid ultraviolet curing ink and stimulate the further curing of the deep ink film.
Compared with traditional ink, the polymerization and drying of ultraviolet curing ink is more thorough, without any evaporation or solvent pollutants, and the ink film 100% curing. 3. Electron beam curing ink (EB ink)
Electron beam curing ink refers to an ink that can quickly change from liquid to solid state under the irradiation of high-energy electron beam, also known as EB ink.
Electron beam curing ink is mainly composed of pigment, binder, auxiliary agent, pigment, etc.
Electron beam curing uses electron beam as irradiation energy, conducts radiation chemical reaction with active liquid chemical formula, and rapidly dries and solidifies at normal temperature.
In the professional food packaging industry, the printing of low migration ink is an important research topic. The continuous improvement of printing technology and the minimization of ink migration degree are the guarantee of food packaging printing safety.
I believe that with the attention of the country and the continuous improvement of people's quality of life, environmental protection ink will be used more and more widely in the future.