KR20180004965A - Method for Indication of Expiration Period - Google Patents

Abstract

The present invention relates to a method for indicating an expiration date on a packaging means of a product having an expiration date present thereon, thereby easily checking an expiration date by discoloring or removing the expiration date when the expiration date arrives.

Description

Method for Indication of Expiration Period in Packing Means [

The present invention relates to a method for displaying an expiration date on a packaging means of an article having an expiration date. When the expiration date comes, the expiration date is discolored or erased so that the expiration date can be confirmed.

The indication of the expiration date of the article having the present validity period (mainly food or the like) is displayed at a specific position by a printing method on a packaging means such as a wrapping or a case. The disadvantage of this is that it is not easily visible It is a simple printing method, so it can be reprinted and it is possible to counterfeit.

Also, when the indication of such a validity period is printed at a specific position of the packaging means, the size of the print is so small that even when the notice is visible, the elderly person has considerable difficulty in confirming the date.

Therefore, many problems may arise in the case of not checking the expiration date, but also in order to check the expiration date and exchange the contents. Also in this case, there is difficulty in the operation It is possible.

Therefore, according to the present invention, when the expiration date indicated by the expiration date displayed on the packaging means comes or goes, the expiration date display is discolored or erased so that it can be easily confirmed that the expiration date has passed.

In order to accomplish this, it is possible to mix the components to be discolored when a certain period of time elapses in the printing ink, or to mix the components that can be erased when a predetermined period of time has elapsed.

If it is discolored for this purpose, it shows the degree of discoloration by the irradiation period or quantity of ultraviolet rays, or it can be made to discolor naturally when the time passes.

Also, the method of erasing can be made to be able to be naturally cleared by utilizing the photolytic composition.

Therefore, when the expiration date has passed, the printed date of the expiration date can be easily seen by making the colors and the colors used in the packaging means easily visible, and it is also possible to easily check the expiration date. It is easy to see that the period has passed.

1 is a block diagram for a manufacturing process of the present invention;

Hereinafter, the present invention will be described in detail based on one embodiment.

The present printing ink has an inseparable relation with printing. From the viewpoint of printing, it is said that the image of the original or a plate made on the basis of the original is a material for forming an image for forming and fixing on the surface of the object by the printing means .

In general, as a component of the ink, it is a homogeneous material in which the pigment and the medium are closely dispersed and used for printing.

In terms of printing ink and organic solvent, various kinds of resins are selected and used according to the purpose in order to generally give adhesiveness to an object to be printed, optimum coating property and other properties in printing ink.

Organic solvents are mainly prepared by dissolving these resins to produce vehicles (vehicles) having appropriate drying rates with optimum printing suitability and coating suitability corresponding to each printing type, coating type or each type of machine, .

Therefore, various resins and organic solvents suitable for the printing method and the coating method, the type or performance of the machine, the type of the substrate or the coating material, the processing method, the method of using the printed material or the coating and the purpose of use are used.

First, let's look at the current status of printing inks: Offset ink. Flat plate refers to flat printing plate. This printing plate completely removes printing ink from the area where the printing ink is transferred from the printing press to the printing paper, That is, a portion in which the printing ink does not adhere.

The inks that are opposite to each other are flat panel inks, which are the most widely used in the printing ink field.

Flat plate inks are divided into wet type and dry type flat plate inks depending on the shape of the non-line portion, and dry type flat plate inks are referred to as dry offset ink or waterless ink.

This ink has not yet completely solved the defective dot reprinting by the high speed printing machine series.

Wet-type flatbed inks have been able to take advantage of color in the first printing method in printing history, enabling photolithographic printing, and are constantly advancing to a perfect position to make it hard to find anything new anymore.

As the composition of the offset ink, there are organic pigments and inorganic pigments as pigments which are coloring agents that exhibit hues. In addition to the role of a colorant, they maintain the viscosity of the ink so that the ink can be transferred well from the ink to the printing paper. The uniformity of the halftone dot is improved by giving a uniform cohesion.

In addition, calcium carbonate, sulfuric acid, barium and the like, which are pigmented pigments, are also used for adjusting the color concentration and adjusting the viscosity of the ink irrespective of the coloring.

In order to transfer the added pigment to the printing paper, a liquid oil-like substance having fluidity is required, which is a vehicle.

The vehicle is made by adding vegetable drying oil and mineral oil in harmony with natural resin or synthetic resin.

Since the main component of the ink can not impart the characteristics of the product, it is necessary to supplement the physical properties of the ink.

When classified by function, it can be classified as fluidity adjusting agent, dryness adjusting agent, color adjusting agent, viscosity adjusting agent and abrasion adjusting agent.

In offset inks, set and printing ink display workability is adjusted by minerals, and various types of functional resins are used in resin varnish due to increasing speed of printing.

The offset ink manufacturing method is the most viscous ink among the printing inks, which is more difficult to disperse than other inks having different pigment dispersibility, so that the dispersing effect can be maximized by preliminarily dispersing the ink before dispersing.

The production method largely depends on the performance of the machine, but in particular, the viscosity of the dispersion is influenced, and the ink designers must fully consider the mass production system.

The main element of the gravure ink is composed of a colorant, a resin and a solvent, and the raw material is selected according to the printing material, the processing condition, and the application.

Gravure printing is characterized in that the ink is instantly introduced into the plate cell pocket and transferred to the printed material. Therefore, the gravure ink must have a high drying speed and low viscosity so as not to cause blocking after printing, so that the gravure ink has the fastest drying speed, low.

The resin used for the ink is determined according to the fluidity of the ink, dryness, printability, adhesiveness to the material, and film strength.

Most commonly used resins are polyamide resin, chlorinated rubber, PVC resin, and polyurethane. Most of them use vinyl type resin for OPP and urethane for PET and nylon.

However, since the residual solvent problem has recently arisen, gravure printing inks have undergone a major transition period. Vinyl type inks have a strong tendency to contain residual solvents and are susceptible to changes in external conditions.

In the past, there was no problem with the use of vinyl-based inks, which have excellent printability and post-processability. In order to overcome this problem, urethane ink substitution for OPP film is actively under way.

The urethane ink is advantageous for general use in various kinds of films using various materials such as PET, nylon, and OPP because of its excellent adaptability. In order to solve pollution problems caused by solvents, which are the biggest problems of gravure printing, Or alcohol-type inks. However, water-based inks require not only development of ink, but also development of printing machine and post-processing, and it is difficult to mass-produce the greatest advantage of gravure printing.

Water-based flexo inks are used in a wide range of substrates for printing because of their high safety against fire, low adverse effects on exhaust emissions from the workplace, and low risks other than residual solvents.

Alcoholic flexo inks are mainly used for printing of zones and wrapping paper. In flexo printing presses, there are Anilox Rolls which are not in other plate types. Inks in this type of parametric or lattice type are transferred to the plate surface However, there are two ways to cut extra ink contained in anilox roll: docter cut method which is cut by Docter Blade and Roller Cut method which controls ink amount by pressing between roller and anilox roll using fountain roll There are two kinds of methods.

In alcoholic inks, pigment-type inks and dye-type inks contain many dye-type inks and basic dyes are generally used.

In addition, a color excellent in water resistance, light resistance, and chemical resistance is used for a specific use. The solvent type flexo ink includes polyolefins such as polyethylene and polypropylene, films such as polyester, polystyrene and polyvinyl chloride acetate Absorbing surface such as polyolefin.

Due to the nature of the flexo ink, it has volatility and the state change is much more than other inks (for example, offset ink) due to the evaporation of the solvent during use.

In addition, it may be produced in a low viscosity state and occasionally precipitate or bubble formation may occur.

The drying of the flexo ink means that the liquid polymer is dried and formed into a film. The drying of the flexo ink is made by penetration and evaporation of water, solvent and the like in the ink. The drying promoting component is an alcohol. The drying retarding component is an adjuvant such as a surfactant, And the like.

In addition, the surface tension of the flexo ink affects the film leveling during printing. In general, the surface tension of the flexo ink is 27 to 40 Dyne / cm, the pH range of the aqueous flexo ink is 8.0 to 9.0, To 50%, and the solid content is mainly a pigment binder.

The viscosity of the flexo ink is usually about 10 to 20 sec. Since the viscosity is low, the viscosity is measured by Zahn Cup or Ford Cup. Foam is largely influenced by the surfactant and the acid component of the resin.

The surfactant acts to wet and disperse the pigment in the ink, thereby lowering bubble generation and surface tension.

Composition of the flexo ink The important components used in the production of printing inks are divided into a liquid component, a colorant component and an additive component.

The adjustment of the vehicle (vehicle) is made of natural or synthetic resin, which determines the properties of the ink, such as adhesiveness, fluidity, tack, evaporation rate, permeability and gloss, and basically the vehicle is dissolved in a solvent.

There is a limitation in the solvent used for the ink due to the nature of the flexo printing, and it is necessary to use a solvent which does not cause swelling of the rollers and the chain plate following the printing, and this is a limiting factor by the choice of the resin used in the flexo ink.

The coloring agent component of the ink is a dye or a mixture of both, and the dyeing ink gives a strong concentration and sharpness with low viscosity in printing on paper or the like.

The reason why the dye is not used for the cellophane printing ink is that it elutes into the glycol contained in the cellophane.

Currently, pigments are mostly used for inks.

The pigment is a solid coloring material that is not dissolved in the solvent but is dispersed or mixed in the vehicle, unlike the dye.

As the additives in the flexo ink, there are a leveling agent, a matting agent, a defoaming agent and the like which impart resistance to abrasion, slip and wax smoothness, and these additives modify properties of the resin to impart unique properties to the ink.

The screen ink was originally an object to be printed by manual printing, and a paper and a cloth were used as a main body, and a coating material for paints was mixed with a specific paint. And used as advertising materials such as poster and cloth mouth signboard became the beginning of spread of screen printing.

In the 1960s, with the development of plate-making technology, screen printing by resist ink imported from the United States was used in printed circuit boards of electronic devices, and application in the industrial field was rapidly advanced. In the 1970s, a number of synthetic fibers, collectively referred to as plastics, were developed and marketed as raw materials and printing materials at the technological innovation stage of petrochemicals.

The shape is made of film and molded products and used in commercial and industrial fields. Inks suitable for these materials have been developed and added to conventional printing materials, paper, wood products, metal products and inks for paints, There was a lot of different kinds.

In the 1980s, technological innovation has been diversified. Especially, electronic materials and industrial parts of various kinds of machinery have been converted from old metal or painted materials to plastic, mainly polycarbonate. . On the other hand, due to the oil shock, ink solvents were claimed, and efforts to develop inks such as ultraviolet curable inks and water-soluble inks were made in terms of the Industrial Safety and Health Law and the Fire Service Law.

Screen ink is classified as follows: First: After printing, the curing film is formed by the evaporation of the solvent contained in the ink. The organic solvent of the high boiling point is a lot of ink prescribed, and the drying is delayed, Evaporative drying inks are the mainstream of inks for paper and various plastics.

Secondly, the oil-modified alkyd resin is the main component, and the oil part reacts with oxygen to form a polymer. The reaction proceeds slowly at room temperature, and the oxidation polymerization type ink promoted by heating is used as a metal component, a wood product, , Which has drawbacks of brushed on the ink surface during storage.

Thirdly, it is necessary to heat and dry at 120 to 170 ° C for 20 to 30 minutes with an ink which is cured by heating, and it is mainly composed of an acrylic type, melamine type and epoxy type resin, and the cured film has excellent physical properties Curable inks, mainly used for metal printing.

Fourth: Ink and curing agent are used as a set. When they are used, they are mixed and printed at a certain ratio. When the two are mixed, the reaction proceeds and the ink is thickened. The performance of the ink coating is enhanced, the completion of the ink coating is excellent in gloss, the thick film is excellent in adhesion of the material, the performance of various physical properties is excellent, and the ink of the epoxy system and the urethane resin is the mainstream Two-liquid reactive inks are used for printing materials such as metals, metal stamps, glass, and pretreated polyethylene.

Fifth: Inks which are cured in a unit of light by ultraviolet rays to cause curing in a second unit. The main components are photopolymer resin, a photopolymerization initiator, a pigment and a preparation, and the solvent is not included. The viscosity adjustment is performed using an ultraviolet curable ink Ink), it is necessary to establish conditions such as lamp strength, number of lamps, irradiation distance, conveyor speed, etc. of the printing material and UV irradiator.

First, it is evaporative drying type ink mainly composed of vinyl resin. Soft vinyl is used for printing materials such as packing materials, stationery, and toys. In the case of toys, it is necessary to use inks that meet safety standards, Ink for vinyl used in vinyl is also used in displays, electric plates, instrument panels, markers, and so on.

Second: Evaporative drying type ink mainly composed of polyester resin. Good adhesion, weather resistance, oil resistance and alcohol resistance. In addition, it has excellent properties such as dryness, abrasion resistance, The required inks for polyester are now widely used in industrial instrumentation.

Third: Ink for acrylic, which is an evaporative drying type ink that prescribes high quality pigment mainly composed of acrylic resin, is used for printing various kinds of instruments, sign boards, traffic sign boards, molded products, displays, etc., Is advantageous for moldability of

Fourth: In the inks for polystyrene resins used in materials such as polystyrene, AS resin, ABS resin molded article, sheet, foaming agent and the like which have poor solvent resistance due to evaporation drying type ink composed mainly of a soluble resin by glycol ether, In case of plate-making with a content-type emulsion, it is necessary to pay attention to extrudability.

Fifth: Although the degradation of the solvent resistance of the material gradually improves with the evaporation drying type ink of the same component as that of the ink for the polystyrene type resin, since the polycarbonate ink which requires attention to the influence of the ink solvent has excellent physical properties, It is widely used in printing.

Sixth: Since PE and PP are more screen printed on sheet or molded part than film, because the material is inert, the ink is not good in adhesiveness. Therefore, it is used by surface treatment with corona discharge or flame. Epoxy resin type, urethane resin type two-liquid reaction type, one-liquid heat drying type Ink for polyolefin having many inks has many preprocessed prints for beverages, containers for agricultural products, containers for bottles and daily necessities.

Seventh: Epoxy-based, urethane-based two-liquid reaction type and one-liquid heat drying type inks are used for direct printing of metal. In the case of metal coatings such as outdoor signboards and vending machines, depending on the properties of the painted coating, Oxidation polymerization type inks are also used for inks for metal fittings.

For the durability products such as bottles, small-sized ceramic inks based on ceramics are used. For decoration and propagation products, there are inks for glass in which epoxy-based inks are used.

Also, ink for paper and woodwork can be printed with any type of ink, but there are many types of evaporation and drying type, and transfer ink is mainly composed of evaporation drying type, contents are different from each other. Evaporation drying type ink or two-liquid type reactive ink mixed with urethane resin is used for synthetic leather and synthetic fiber in synthetic leather bag, sporting goods, synthetic fiber jumper, umbrella, and tent.

In the case of commercial printing, inks for foaming, liquids for dyes (liquid crystals, pigments, etc.) are used in the case of commercial printing, while inks for fabrics are classified into those for use in banners, t- There are ink, scratch-off ink, perfume ink and fluorescent ink. In industrial printing, conductive ink, resistance ink, insulating ink, resist ink, solder resist ink, phosphorescent ink, black light ink, Type ink is mainly used. In industrial use, UV inks are widely used for insulating ink and solder resist ink.

The ink composition is intended to be printed in such a manner that an appropriate amount of the desired coloring agent is mixed with the ink composition or an appropriate amount of the light decomposition agent is mixed.

Claims (3)

A method of displaying a valid period in a packaging means in which a coloring agent is additionally contained in the composition of an ink formed according to various printing forms, In a packaging means in which a photocatalyst is additionally contained in the composition of ink formed according to various printing forms and the expiration date display printed on the packaging means is disassembled and erased when a predetermined time elapses, 3. The method according to claim 1 or 2,
In the packaging means to which a solvent for dispersing the coloring agent and the light-scattering agent in addition to the coloring agent or the optical decomposition is dispersed,

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