JPH03195784A - Printing ink for bar code symbol - Google Patents

Abstract

PURPOSE:To provide the subject ink composed mainly of a colorant, a peelable resin, an organic solvent and a specific amount of silicon oxide film powder and easily removable when becomes unnecessary. CONSTITUTION:The objective ink contains (A) an inorganic or organic colorant, (B) a peelable resin such as polyvinyl butyral resin, a vinyl chloride/vinyl acetate copolymer resin or a cellulose derivative, (C) an organic solvent dissolving the component B, e.g. alcohols or esters and (D) 1-50wt.% (based on the component B) of silicon oxide fine powder having particle size of <=40mmum (preferably <=16mmum).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing ink for barcode symbols that can be easily removed when no longer needed.

[Prior art] In recent years, electronic DPS (Electronic DPS)
The development and spread of computers, facsimiles, etc. has been remarkable, and the data that must be input is
It is on the rise. Therefore, data input is distributed.

As the need for eliminating key bunches and directly inputting handwritten data has increased, barcode symbol reading devices that can directly input various data have been developed and their use is increasing.

A barcode symbol reading device scanner consists of a light source that emits light and a light receiving element that detects the reflected light.The basic principle is that the light emitted from the light source is first irradiated onto the information recording medium; Next, a light receiving element, which is a photoelectric converter, captures the reflected light, converts its strength into an electrical signal, and then the signal is recognized as information by a recognition device.

Various combinations of the light source and the light receiving element are currently being developed, and the combination exhibits spectral characteristics unique to the device,
Therefore, the barcode symbol must be suitable for the spectral characteristics unique to the device, and is subject to many restrictions.

That is, as colors for creating a barcode symbol, white, yellow, orange, red, etc. are used for the white bar, and white, yellow, orange, red, etc. are used for the black bar.
Colors such as blue, green, purple, and black are used. And 1. The barcode symbol is printed on the product case or the product itself, or is used by pasting an adhesive film or paper on which the barcode symbol is printed onto the product.

[Problems to be Solved by the Invention] By the way, when printing a barcode symbol on the product itself, the combinations of colors that can be used are limited due to the special characteristics of the reading device as described above.

As a result, there were problems in that the design of the product was limited, the aesthetic appearance of the product was impaired, and the value of the product was lowered.

To solve this problem, if adhesive film or paper with a barcode symbol printed on it is pasted on the product, the cost will increase, and depending on the type of film, paper, and adhesive, it may be difficult to remove or may be difficult to remove. There was a problem in that the adhesive remained after the product was removed, staining the product.

Therefore, the inventor of the present invention maintains the ability to reliably read information when a barcode symbol is necessary (i.e., before purchase by the final consumer), and when it is not necessary (i.e.,
The object of the present invention is to provide a barcode symbol printing ink for forming a barcode symbol that can be easily removed (after purchase by a consumer).

[Means for Solving the Problems] The present inventor has finally completed the present invention as a result of intensive research to achieve the above object.6 That is, the present invention uses a colorant and a peelable resin. The gist of the present invention is a barcode symbol printing ink comprising at least an organic solvent for this peelable resin, and 1 to 50% by weight of fine particles of silicon oxide based on the peelable resin.

The present invention will be explained in detail below.

The coloring agent is used for reflecting or absorbing the irradiated light, and is selected as appropriate depending on the optical properties of the printing material.If it is a dye, one that is soluble in the above-mentioned organic solvent is used, and if the pigment is an inorganic type,
Can be used regardless of organic type.

The peelable resin is a binder of the composition and provides fixing and peeling properties of the coating film, and specifically, it is a polyvinyl butyral resin.

Vinyl chloride-vinyl acetate copolymer resin, cellulose derivatives, etc. can be used.

Specific examples of polyvinyl butyral resin include Denka Butylar/L/#2000-L, Denka Butylar/L/#2000-L, Denka Butylar/L/#2000-L, Denka Butylar/L/#2000-L, Denka Butylar/L/#2000-L, Denka Butylar/L/#2000-L,
3000-2. Same #3000-4. Same #4000-1.
#4000-2 (The above are Denki Kagaku Kogyo-II, S-LEC BL-1, S-LEC BL-2, BL-8, BX-
Examples of the vinyl chloride-vinyl acetate copolymer resin include Denka Vinyl #1.
000A, same #1000AS, same 91000G, same #1
000C5, #1000G, #1000I.

(The above is Denki Kagaku Kogyo ■Iri, S-LEC A, C.

M (manufactured by Tanemizu Chemical Industry ■), Geon440-L
2. 427-T, 427-8.427-C (more than 1
Examples of cellulose derivatives include ethyl cellulose (Percules Co., Ltd. 11), ethyl hydroxyethyl cellulose (Percules Co., Ltd. I), etc.
Examples include ri.

The organic solvent dissolves the peelable resin, and examples of the solvent for polyvinyl butyral resin include ethanol,
Examples include alcohols such as isopropanol, 5ec-butanol, and n-butanol, and glycol ether esters such as methyl cellosolve, ethyl cellosolve, and cellosolve acetate.As solvents for vinyl chloride-vinyl acetate copolymer resin, methyl ethyl ketone, Examples of solvents for ethyl cellulose among cellulose derivatives include ketone agents such as methyl isobutyl ketone and esters such as ethyl acetate and butyl acetate.

Examples of solvents for ethyl hydroxyethyl cellulose include esters such as ethyl acetate and butyl acetate, alcohols such as methanol and ethanol, and aromatic hydrocarbons such as toluene and xylene. Examples include aliphatic hydrocarbons such as spirit.

In addition to the above-mentioned solvents, solvents that are not good solvents for resins can also be used in combination for purposes such as controlling dryness and viscosity.

It is necessary to select these solvents according to the material of the printing target, and in particular, it is necessary to select a solvent that does not swell or dissolve the printing target.

Fine particle silicon oxide is used to improve the printing accuracy of barcode symbols, and specifically, Aerosil #130 (average particle size 16 millimicrons, the same applies hereinafter), Aerosil 200 (12), #300 (7
), #380 (7), #0 (16), #0X50
(40), TT600 (40), MOX80
(30), MOXI70 (15), R972 (
16) (manufactured by Nippon Aerosil ■), etc.
The size of the particles is 40 mm or less, more preferably 16 mm or less, and the amount used is 1 to 50% by weight.

If it is less than 1% by weight, the effect is low and printing accuracy is poor, and if it exceeds 50% by weight, the coating film becomes brittle and has poor durability.

Moreover, a release agent, other additive resins, plasticizers, surfactants, leveling agents, etc. can also be added as necessary.

In the case of a barcode symbol as referred to in the present invention, when the substrate to be printed has a high reflection of irradiated light.

A part of the black bar is formed as a coating film, and the printing material itself is used as a white bar.If the reflection of the irradiation light of the printing material is low, a part of the white bar is formed as a coating film, and the printing material itself is used as a black bar. It is also possible to form and use conventional symbols on the uniform coating according to the present invention.

[Function] Since the printing ink for barcode symbols according to the present invention contains fine particle silicon oxide in an amount of 1 to 50% by weight based on the peelable resin, printing accuracy is good without causing sag or bleeding during printing. Therefore, it can be fully read by a general barcode symbol reading device.

Furthermore, since a peelable resin is used as a binder, the end user can wipe off the product with a soft cloth after purchasing the product.

Therefore, although it may sometimes seem that the aesthetic appearance of the product is spoiled or the design is limited, it is essentially the same.

This is a barcode symbol that has no effect on the product.

[Example] Hereinafter, the present invention will be explained in more detail with reference to Examples. In the Examples and Comparative Examples, 1 part j indicates "part by weight".

Furthermore, although the present invention uses screen printing as a method for creating barcode symbols, various methods other than screen printing may be used, and the present invention is not limited to the embodiments.

Oba Masudo Fuji AC White 30.0 copies (
Dispersed pigment of titanium oxide, manufactured by Fuji Shiki ■) Denka Butyral #2000-L 60.0 parts (25% methyl cellosolve solution) Aerosil $130 1,0 parts (fine particle silicon oxide, thixotropic agent, manufactured by Nippon Aerosil ■) Butyl cellosolve 5.0 parts or more of the ingredients were sufficiently stirred in a homomixer to obtain a screen printing ink.

Fuji As Black 30.0 parts (Tobonbray 9 dispersed pigment, manufactured by Fuji Shiroki ■) Denka Butyral #2000-L 50.0 parts (25% methyl cellosolve solution) Nissan Nimean 2.0 parts (alkyl amine oxidation Ethylene derivative, manufactured by Nippon Oil & Fats ■) Aerosil #200 1,0 parts (
Fine particle silicon oxide, thixotropic agent.

(manufactured by Nippon Aerosil ■) The above components were sufficiently stirred in a homomixer to obtain a screen printing ink.

11" - Fuji AC White 35.0 parts Eslec BL-840.0 parts (25% methyl cellosolve solution) Sansocizer E 6.5 parts (epoxy softener, manufactured by Shin Nihon Rika ■) Nirasanamine DT
2.8 parts (beef tallow alkylpropylene diamine).

(manufactured by NOF ■) Aerosil # 300 4, 5 parts (fine particle silicon oxide, thixotropic agent.

(manufactured by Nippon Aerosil ■) The above components were sufficiently stirred in a homomixer to obtain a screen printing ink.

Shio Kankyu S-Lec A 80.0 parts (methyl isobutyl ketone 25% solution) Kronos KR-380
20.0 parts (Titanium Brewing, Titanium Kogyo #) Disperbyk-1010, 5 parts (Dispersant, USA, Vic, Mallinckrodt Company II) Aerosil R9
720, 4 parts (fine particle silicon oxide, thixotropic agent, manufactured by Nippon Aerosil ■) The above components were mixed and dispersed using three rolls to obtain a screen printing ink.

Ethyl cellulose N-770.0 parts (toluene:ethanol; 25% solution of 1:1 mixed solution) Printax #45 10.0 parts (
Carbon black, manufactured by Degussa ■) Disperbyk-1010, 8 parts Polyethylene glycol #1000 1, 0 parts (plasticizer) Aerosil #380 2, 5 parts (
Fine particle silicon oxide, thixotropic agent.

(manufactured by Nippon Aerosil ■) The above components were mixed and dispersed using three rolls to obtain a screen printing ink.

Le Defeated P, P 90.0 copies (resin liquid for screen printing, manufactured by Seiko 7 Dovan Xfle) P
Rintex #45 20.0 parts Aerosil R9722 0 parts or more of the ingredients were mixed and dispersed using three rolls to obtain a screen printing ink.

In addition, commercially available strippable paint, glass design color [white] (manufactured by Washin Paint), was compared with cliff comparison and in Example 1, the amount of Aerosil x130 used was 0.
A screen printing ink was obtained in the same manner as in Example 1, except that one part was used.

In Example 1, the amount of Aerosil #130 used was 9.
Screen printing inks were obtained in the same manner as in Example 1, except that the amount was 0 parts. A barcode symbol was printed by screen printing (using a 300-mesh screen), and a durability test, a removability test, and a printing accuracy test were conducted.

The results are shown in Table 1.

Table 1 - Printing material Water-based ballpoint pen: Shaft material; polypropylene; Shaft angle: green; Pentel ■Oil-based marker: Shaft material; polypropylene.

Shaft color: White, Pentel am Glass bottle: Sample tube bottle N004, Benuchi ■Durability test: Printed material was placed in a paper box and transported round-trip between Tokyo and Kitakyushu, and 2-week store line The barcodes were read for those that had been lined up.

0: Good reading x: Poor reading/removability test: The printed material was rubbed with a soft cloth to wipe off the barcode.

0: Can be wiped off easily As explained in detail above, barcode symbols made with the printing ink for barcode symbols according to the present invention can reliably read information when it is needed (i.e., before purchase by the end consumer). It maintains its performance and can be easily removed when it is no longer needed (that is, after purchase by the end consumer), making it an excellent product that does not spoil the appearance of the product or impose restrictions on the design.

Claims (1)

[Claims] A printing ink for barcode symbols comprising at least a colorant, a peelable resin, an organic solvent for the peelable resin, and 1 to 50% by weight of fine silicon oxide based on the peelable resin.