New type of green ink benefit food plastic packaging

      With deeply rooted in the hearts of the people environmental protection consciousness,green printing technology development,consumer is becoming more and more high to the requirement of food packaging,this also to India In the brush ink materials put forward higher requirements.

      Food packaging shall not use conventional printing ink,printing manufacturers must ensure that all after printing ink solvents in volatile,ink will cure thoroughly,and To achieve the corresponding standard application industry.

      In the current food plastic packaging printing,the most widely used benzene soluble chlorinated polypropylene ink.This kind of ink manufacture and use of the technology are mature,Mainly used in BOPP (two-way stretch polypropylene) material in the printing,and adopts the intaglio printing method.Although the ink printing eligibility is good,after printing Work performance is good,quick drying, but still exist many defects.

1.the relative toxicity of toluene is bigger,print solvent residual values on the high side.

2.the poor thermal stability of chlorinated polypropylene,in the process of production and storage,easy release of chlorine and hydrogen chloride formation,make the ink in strong acid To print roll is produced in the production of heavy corrosion.

3.benzene soluble ink can damage the ozone layer,in use process will cause harm to workers' health and safety,and residue in the packaging system Product in the residue,under certain conditions can cause to a certain extent to the packaging of food contamination.This ink is tend to be eliminated,and some in Europe Developed countries have successively develop prohibited or control regulations on the use of the ink.

     It is because of benzene soluble ink exist problems,environmental printing ink arises at the historic moment.Adopt environmental printing ink,neither to the environment pollution,not again Cause physical harm to operators,but also won't cause damage with food.

We have environmental printing ink:

1.Water-based ink

      Water-based ink is the vast majority of flexo packaging printing house at home and abroad used in printing ink,it is mainly composed of water soluble resin,organic pigment,solvent,and phase Guan processed by composite grinding processing.Water soluble resin is the nexus of water-based ink,often choose domestic water-soluble acrylic modified resin as a link of material,its Heat resistance,weather resistance,chemical resistance,resistance to pollution and glossiness has significant advantages,such as whether directly disperse dissolved or synthetic polymer emulsion,All show the excellent performance,water-based ink does not contain volatile organic solvents,not only can reduce the printing quality of residual toxicity,and can prevent because of static electricity and inflammable Solvent contact and burst into flames.Water-based ink is not only a new type of "green" printing ink,and is the best product to replace benzene soluble ink.

2.Ultraviolet (UV) curing ink

      The uv curing ink refers to under certain wavelengths of ultraviolet light,ink links within the crosslinking reaction between,from a liquid into a solid As curing inks,it before the link is dissolved,macromolecular prepolymer is firmly form ink film.The uv curing ink is mainly used for soft soft base material Printing,it is composed of prepolymer,reaction diluent,pigments,additives,light initiator/composite.The selection of reactive diluent of ink Migration of reaction;Additives on the performance of the ink,printing eligibility,printing ink of migrating,the wetting of the substrate,the coefficient of friction and abrasion resistance,pigment dispersion and stability) and the smell of print to adjust;Requests the pigment to the ultraviolet absorption spectrum range as small as possible,the ideal pigment Should have good dispersion,good flowing property, strong tinting strength,ultraviolet absorption of tiny,under light irradiation for polymerization characteristics of no harm.Using ultraviolet solid Should be paid attention to when printing ink polymerization inhibition,surface tension and wetting effect,and the correlation of the ink viscosity and humidity,the expansion of the print;Due to the printing ink adhesion of plastic is bad,so need to printing plastic flame treatment or corona discharge treatment,in order to improve the adhesion of the plastic surface.

3.The electron beam curing ink ink (EB)

      Electron beam curing ink is refers to under the irradiation of high energy electron beam can quickly shift from liquid to solid ink,also known as EB ink.The electron beam energy High solids such as pigment and filler has a strong penetrating power,there will be no ink is absorbed by the pigment or filler block,ink membrane drying Not be affected.

      Environmental printing ink will be in the food packaging industry in the future,make good printing material Material products.

By Nicole