JPS63251287A - Ink ribbon for producing dry transfer material - Google Patents

Abstract

PURPOSE:To enable transfer and printing to be performed on a surface having a good releasability, by providing a pressure-sensitive adhesive layer formed on one surface of a film-form ribbon substrate and a thermal transfer ink layer which is formed on the pressure-sensitive adhesive layer and composed by provid ing a coloring agent, a heat sensitive adhesive resin, and a tack imparting resin. CONSTITUTION:A pressure-sensitive adhesive layer 12 is formed on one surface of a film-form ribbon substrate 11, and thereon a thermal transfer ink layer 13 is further provided in a predetermined thickness. In addition, a sticking preventive layer 14 consisting of a heat-resistant resin such as a silicon resin is formed, as necessary, on a surface of the ribbon substrate 11 reverse to the surface coated with the pressure-sensitive adhesive layer 12. The thermal transfer ink layer 13 is composed as a layer which is higher in viscosity and larger in thermal adhesion, hardness, and cohesion than the pressure-sensitive adhesive layer 12 under thermal transfer conditions. In this manner, in the thermal transfer, the thermal transfer properties to a low-wetting surface is enhanced, an unsatisfactory transfer, i.e. crushing or spreading, is effectively improved, and the scraping of ink by a head is satisfactorily prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a thermal transfer ink ribbon used in the production of dry transfer materials, and in particular, the present invention relates to a thermal transfer ink ribbon used in the production of dry transfer materials. Transfers even to surfaces with poor removability and strong removability.
A dry transfer material that is printable and allows a transferred image obtained by heat-sensitive transfer to an object to be transferred to be effectively pressure-sensitively retransferred onto a second target object by pressure. This invention relates to ink ribbons for manufacturing.

[Prior Art] In recent years, thermal transfer printers, typewriters, word processors, and other printing devices have been developed and are now widely used for everything from small-sized personal use to business use. Printing using this thermal transfer method is
Bringing the thermal transfer ink ribbon into close contact with a predetermined printing paper using a thermal head, and causing a predetermined heating element among a large number of heating elements included in the thermal head to generate heat; This is done by melting the part of the hot-melt ink that is in contact with the paper and transferring it to the printing paper.

By the way, this type of thermal transfer ribbon has conventionally been made by simply coating a heat-melting ink consisting of a colorant and a binder agent on a predetermined support, and the binder agent is mainly made of wax. It was supposed to be an ingredient. Moreover, this type of thermal transfer ribbon is only intended for use with ordinary paper as the transfer material.

On the other hand, recently, with the spread of thermal transfer methods, there has been a demand for improved transferability to rough paper (paper with low smoothness), and various patent applications related to this have been filed. Various technologies have also been proposed, such as multi-type ribbons that enable multiple transfers and printing with the same ink ribbon, and collector ribbons that can erase and correct typos.

[Problems to be Solved by the Invention] However, to the best of the inventors' knowledge, the present invention aims to enable transfer and printing on surfaces with poor wettability and good releasability and peelability. To date, no reports have been made regarding thermal transfer ink ribbons. Moreover, since the thermal transfer method has not been adopted at all as a method for producing dry transfer materials for instant lettering, the thermal transfer ink ribbon used to produce dry transfer materials for instant lettering is No proposals have been made so far.

SUMMARY OF THE INVENTION Therefore, the present invention employs the following configuration in order to solve the above problems.

[Means for Solving the Problems] The gist of the present invention is to provide an ink ribbon for producing a dry transfer material, which converts a transferred object into a dry transfer material by thermal transfer, and which uses a film-like ribbon base material. A pressure-sensitive adhesive layer provided on one side, and a heat-transferable ink layer provided on the pressure-sensitive adhesive layer and containing a colorant, a heat-sensitive adhesive resin, and a tackifying resin. An ink ribbon for producing dry transfer materials, which is characterized by:

Here, as illustrated in FIG. 1, the ink ribbon 10 for producing a dry transfer material has a film-like ribbon base (support)
A pressure-sensitive adhesive layer 12 is formed on one surface of the paper 11, and a thermally transferable ink layer 13 is further formed thereon to a predetermined thickness. An anti-sticking layer 14 made of a heat-resistant resin such as silicone resin is provided on the surface of the ribbon base material 11 opposite to the surface coated with the pressure-sensitive adhesive layer 12, if necessary.

In such an ink ribbon 10 for producing dry transfer materials, the film-like ribbon base material 11 that supports the pressure-sensitive adhesive layer 12, etc. may be any of various types conventionally used as base materials for thermal transfer ink ribbons. Any of these can be used, but in particular, since the ink ribbon comes into contact with the thermal head (printing device) for thermal transfer,
Suitable materials include plastic films made of polyester, polyimide, polycarbonate, polysulfone, polyethersulfone, and polyphenylene sulfide, or papers such as capacitor paper and glassine paper, which have a heat resistance temperature of 150° C. or higher; in particular, polyester,
Polycarbonate and polyphenylene sulfide are preferred from the viewpoint of heat resistance and the like. The thickness will also be determined appropriately depending on the type of material, but generally 3 to 20 μm.
It is desirable to use a tape having a thickness in the range of m from the viewpoint of various necessary properties of the tape.

Further, the pressure sensitive adhesive layer 12 includes a binder component and I, J
It is mainly composed of a pressure bonding component.

Examples of the binder component constituting the pressure-sensitive adhesive layer 12 include ゛, ■ Candelilla wax, carnauba wax,
Rice wax, vegetable wax such as wood wax, beeswax,
Animal waxes such as lanolin and spermaceti; mineral waxes such as montan wax and ceresin; petroleum waxes such as paraffin wax and microcrystalline wax;
Synthetic waxes such as polyethylene waxes, and α
- A wax consisting of one or more resin waxes such as an olefin-maleic anhydride copolymer, and one or more petroleum resins, rosins, hydrogenated rosins, rosin esters, ketone resins, phenolic resins, etc. A tackifier consisting of at least one species is used.

This tackifier functions to improve the adhesion and hardness of the pressure-sensitive adhesive layer 12, to impart cohesive force, to impart tackiness, and to impart tackiness to the pressure-sensitive adhesive component. In particular, as the tackifier, petroleum resin, rosin, hydrogenated rosin, and rosin ester are preferred from the viewpoint of tackiness and the like. Further, the wax and tackifier constituting the binder component are generally mixed in a ratio of 15:1 to 3:2 on a weight basis.

Furthermore, the pressure-sensitive adhesive components constituting the pressure-sensitive adhesive layer 12 include polyvinyl chloride, polyacrylic ester, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polyvinyl acetate, polyvinyl ether, A combination of one or more of vinyl polymers such as polyvinyl acetal and polyisobutylene, Pa fiber polymers such as ethyl cellulose, nitrocellulose, and cellulose acetate, and rubber polymers such as chlorinated rubber and natural rubber. used. In particular, polyacrylic acid ester, ethylene-
Vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and polyvinyl acetate are preferred from the viewpoint of adhesive properties and the like.

In addition, in order to supplement the thickness of the ink layer 13 or adjust the color tone, pigments such as carbon black or dye H may be used as needed.
A species or two or more species may be added.

The binder component and the pressure sensitive adhesive component constituting the pressure sensitive adhesive layer 12 are generally blended in a ratio of about 40 to 93:2 to 30, preferably less than 3000 centivoice at a temperature of 95°C. Especially 100-1000
The composition is made to have a viscosity on the order of centivoice. Also,
Such a composition is made into a liquid by dissolving or dispersing it in an appropriate solvent, or is made into a molten state by heating and mixing, and then applied onto the desired film-like ribbon substrate 11.
It is coated or hot-melt coated according to traditional methods.

On the other hand, the heat-transferable ink layer 13 as a top coat formed on the pressure-sensitive adhesive layer 12 has a higher viscosity than the pressure-sensitive adhesive layer 12 under thermal transfer conditions, and has higher heat-sensitive adhesive properties, hardness, and It is structured as a layer with high cohesion. When thermally transferring the thermally transferable ink layer 13 to a base sheet as a transfer object, its adhesive force is strengthened, so that thermally transferable to surfaces with poor wettability is improved, and cohesive force, viscosity, Since the hardness is increased, transfer defects such as soaking and spreading can be effectively improved, and the ink can also be effectively prevented from being scraped by the head of a printing device.

In addition, pressure is applied from behind the basic sheet of the dry transfer material to transfer the ink image (transfer image) created by G6 transfer to the second
At the time of pressure-sensitive transfer, the thermal transferable ink layer 13 has high cohesive force and hardness, so that it can be transferred from the basic sheet as one piece without any residual ink.
It makes it possible to transfer a predetermined ink image, and the transferred ink also spreads, making it possible to obtain a beautiful image with no leakage, and at the same time protecting itself and making it strong.

The thermal transferable ink layer 13 is made of (1) a first resin having high film-forming properties and high iQ adhesive properties, such as ethylene-vinyl acetate copolymer, polyvinyl acetate, ionomer acrylic polymer, ethylene-ethyl acrylate; Copolymer, ethylene-acrylic acid copolymer, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polyvinylpyrrolidone, polyvinyl alcohol, polyamide, ethyl cellulose, etc., and (2) have a large cohesive force. , a tackifying second resin, such as petroleum resin, rosin, hydrogenated rosin, rosin ester,
It is mainly composed of one or more types of ketone resins, phenolic resins, etc., and (3) one or more types of 11 agents, such as pigments or dyes such as carbon black.

Among the first resins, ethylene-vinyl acetate copolymer, polyamide, and ethyl cellulose are more preferable from the viewpoint of film-forming properties and heat-sensitive adhesive properties, and among the second resins, petroleum resins, rosin, and hydrogenated resins are more preferable. Rosin and rosin ester have cohesive force,
More preferred from the viewpoint of tackifying properties and the like.

The first resin, the second resin, and the colorant are l:
0.5-10:0.1-5 is preferable, especially 1:0.8
~7: 0.2 to 3 is preferable from the viewpoint of performance balance.

The first resin is either incompatible with the pressure-sensitive adhesive layer 12 or difficult to mix with the pressure-sensitive adhesive layer 12, and a large heat-sensitive adhesive film is formed on the pressure-sensitive adhesive layer 12. The other second resin improves the adhesion between the first resin and the pressure-sensitive adhesive layer 12, increases cohesive force, hardness, and adhesiveness, and improves heat-sensitive transferability. It is added for adjustment.

In addition, in order to adjust melting point, melt viscosity, film strength, etc., improve heat sensitivity, prevent stringiness, and improve cleanliness, as an auxiliary ingredient, Candelilla wax,
Vegetable waxes such as carnauba wax, rice wax and wood wax; animal waxes such as beeswax, lanolin and spermaceti; mineral waxes such as montan wax and ceresin;
Waxes consisting of one or more of petroleum waxes such as paraffin wax and microcrystalline wax, synthetic waxes such as polyethylene wax, and resin waxes such as α-olefin-maleic anhydride copolymer; Phosphate esters such as tributyl acid, triphenyl phosphate, dimethyl phthalate, di-n phthalate
- One or more of phthalic acid esters such as octyl, aliphatic basic acid esters such as bunal oleate, aliphatic dibasic acid esters such as dibutyl adipate, dihydric alcohol esters such as diethylene glycol dibenzoate-1, etc. Plasticizers consisting of two or more types, Drying oils such as linseed oil and tung oil, semi-drying oils such as soybean oil, cottonseed oil and rapeseed oil, non-drying oils such as peanut oil, olive oil, camellia oil and castor oil, etc. Fats and/or oils consisting of one or more types of vegetable oils, animal oils, fatty acids such as palmitic acid, stearic acid, oleic acid, behenic acid, higher alcohols, polyhydric alcohols, etc. ■Anion activators, cations One or more surfactants selected from one or more surfactants such as surfactants, nonionic surfactants, and zwitterionic surfactants may be added.

Among the above items (1) to (2), surfactants (2) improve the wettability, so that the transferability to the transferred material is particularly good.

The ratio of the sum of the amounts of the first resin, the second resin, and the colorant to the amounts of waxes, fats and/or oils, and surfactants is based on weight: 100:2~
40 is preferred. If the latter is less than 2, the effect will be low;
If it exceeds 0, the adhesive strength will decrease.

The ratio of the sum of the amounts of the first resin, the second resin, and the colorant to the amount of plasticizers is 100:
2 to 25 is preferred. If the latter number of grooves is less than 2, the effect will be low, and if it exceeds 25, the adhesive force will decrease.

In this way, the above-mentioned auxiliary components adjust the melting point and melt viscosity of the thermal transfer ink layer 13 mainly composed of the first resin, the second resin, and the colorant, improve the thermal sensitivity, and improve the thermal transfer ink layer 13. further improves transfer performance.

The composition comprising the first resin, the second resin, the colorant, and optionally the above-mentioned auxiliary components can be prepared in the form of an aqueous solution or dispersion, or in the pressure-sensitive adhesive layer 12.
The pressure-sensitive adhesive layer 1 is applied in the form of a solution or dispersion of a general-purpose organic solvent that does not attack the
2 to a predetermined thickness. The thermal transferable ink layer 13 formed in this manner has a higher viscosity than the pressure-sensitive adhesive layer 12 under thermal transfer conditions, and generally has a viscosity of 95° C.
The layer has a viscosity of 3,000 centipoise or more, preferably 10,000 centipoise or more at a temperature of .

In addition, kaolin was used in the thermal transfer ink layers 1 and 3 formed in this way to adjust the film strength and obtain a sharp printed image, as well as to prevent stains and blocking. , fillers such as talc, bentonite, titanium oxide, and organic or inorganic powders such as metal soaps such as zinc stearate and aluminum stearate.
It is also possible to incorporate them in proportions not exceeding 15% by weight.

Furthermore, a pressure sensitive adhesive layer 12 and a ribbon board 11 are added as necessary.
In order to adjust the adhesive force of the pressure-sensitive adhesive layer 12, a release layer made of a release agent may be provided fixed to the ribbon base material 11 between the ribbon base material 11 and the pressure-sensitive adhesive layer 12.

Using the ink ribbon 10 obtained in this way, the shape of the head heating element, the position of the head heating element, the head mounting angle,
When a transfer image such as a desired character or figure is thermally printed on a film with a surface with poor wettability using a thermal transfer printer that adjusts the head pressure, winding torque, head application energy, printing speed, etc., it spreads. , Pickled, Thickness,
A good printed image can be realized without causing problems such as scraping by the head, stringiness, yuzu skin, and insufficient transfer.

In addition, even if the image printed in this way is pressure sensitively transferred onto the target material such as paper, plastic, metal, etc. by applying pressure from the back side of the film sheet, it will not remain on the film. There is no ink, and furthermore, the transferred image can be a good, firmly adhered image without crushing, spreading, or brittleness.

[Example] Examples of the present invention are shown below, but the present invention is not limited thereto, and various embodiments can be adopted without departing from the gist.

The following formulations for pressure-sensitive adhesive layer and thermal transferable ink layer were prepared.

Formula for pressure sensitive adhesive layer - 1l 1 dish*! , / T'U 9-'s
3 [Kyoto oil 11 effect H Cassitey Rarrow 2698 Ko evil crystal alcohol] Fallen flower P10 Rosin top 4 chill [Abusive industrial! 4-grade super esthetics IIA-10
0] Methyl isobutyl ketone 100 Pressure-sensitive adhesive layer formulation-21 Children's dish 3-'''''! ': 1 tux 5 [Kyoin Yu Hashira Rumor's H Shiteri Rarrow 269B] Rosin Ester 2 [Arayo Kagaku Kogyo Kusei's λ-; 1°-Esthetic JIA-100 Kozub 9
4') 2 MA-7 manufactured by Mitsubishi Kasei Kogyo ■ Methyl isobutyl ketone 100 Formula for thermal transferable ink layer - 111 parts Stone cloth resin
5 [Toho Sekiyu resin tune II L'l/'')tt90] Carbon black
1 [MA-7 manufactured by Mitsubishi Chemical Industries, Ltd.] Methyl isobutyl ketone 53 Formulation for thermal transferable ink layer-2i! ! Ethyl cellulose - 1 [Kanto Kagaku Kyoroku reagent 10cpsl Ekinomi rosin 5 Arayo Kagaku Kogyo Kyusei's Haihe'-11]] Zai-Bo'bu') 1 Mitsubishi Kagaku Kogyo's MA-7 coisopropyl alcohol 53 Formulation for thermal transferable ink layer - 31 Ogun polyamide [Linmite "615A" manufactured by Sanfuro Chemical Industries Co., Ltd.]
&'''”W 4
41 DE 21 Key Bob 1 Crystal 1 MA-7 coisopropyl alcohol manufactured by Mitsubishi Kasei 90 The combination of the above two examples for the pressure-sensitive adhesive layer formulation and the above three examples for the thermal transfer ink layer formulation. 3.5um using 6 combinations
First, a pressure-sensitive adhesive layer is applied to a polyethylene terephthalate film with a dry film thickness of 2 to 30%. um, and then a thermal transferable ink layer with a dry film thickness of 1 to 4 J4
An ink ribbon was obtained by coating and forming the ink ribbon. Using this ink ribbon, printing was carried out on the surface of a polyethylene film 1100u coated with silicone resin as a transfer material using a heat transfer type typewriter (EP43, manufactured by Brother Industries, Ltd.).

The printed images were sufficiently clean and of good quality for all the grain alignments. In addition, by rubbing the polyethylene film while applying pressure from the back side, the printed image on the polyethylene film is pressure-sensitively transferred to the second transfer material such as paper, plastic, or metal, resulting in an image of sufficiently good quality. I was able to form it.

Similar good results were obtained with other silk combinations of the present invention.

The viscosity at 95° C. after drying of each pressure-sensitive adhesive layer formulation and each thermal transferable ink layer formulation is 100 to 1000 centibois for the pressure-sensitive adhesive layer formulation, and 50000 to 50000 centibois for the thermal transfer ink layer formulation. It was an 80,000 centimeter voice.

An ink ribbon in which a 1% transferable ink layer was formed using either Formulation 1 or 2 for the thermal transferable ink layer, but no pressure-sensitive adhesive layer 12 was formed, and a commercially available wax-type thermal transfer ink ribbon. When a transfer test similar to that in the Examples was conducted using the same, both heat-sensitive transferability and pressure-sensitive transferability were insufficient.

Specifically, with regard to the Hat transferability, the former two had problems such as insufficient transferability due to excessive adhesive force to the ribbon base material 11, print shading, and yuzu skin. Commercially available products have problems such as insufficient transferability due to insufficient adhesive strength, spreading of transferred prints due to insufficient cohesive force, viscosity, and hardness, soaking, and scraping of prints by the head.
Problems such as dark printing (darkness) occurred.

Regarding pressure-sensitive transferability, the former two are found to have insufficient transfer due to insufficient pressure-sensitive adhesive strength, insufficient strength of the final transferred printed image due to insufficient adhesion, and poor integral transfer, resulting in residual ink remaining on the film base sheet. Problems such as this occurred. Commercially available products suffer from insufficient transfer due to insufficient pressure-sensitive adhesive strength, insufficient adhesion, and smearing of the final transferred printed image due to insufficient cohesive force, viscosity, and even hardness.
Problems such as spreading, insufficient strength, poor integral transfer, and residual ink on the film base sheet occurred.

As described above, the present invention provides a heat-sensitive adhesive, heat-transferable ink layer with high hardness, viscosity, and cohesive force as a top coat layer, and furthermore, as a lower layer of the ink layer, an ink layer. By providing a pressure-sensitive adhesive layer with a lower melt viscosity between the ribbon base material and creating a two-layer structure, thermal transfer properties to surfaces with poor wettability are significantly improved, and sensitivity is improved. There is an advantage that the pressure-sensitive transferability of the printed image provided by thermal transfer to the second transfer object by pressure is also improved.

Furthermore, if a heat sensitivity improving component such as wax is added to the heat transferable ink layer, the heat sensitivity will be improved and thermal transfer can be performed with low energy. Furthermore, it is possible to adjust the melting point, melt viscosity, film strength, etc. according to the energy, and it also has the effect of preventing stringiness and improving cutting.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view showing an example of an ink ribbon for producing a dry transfer material according to an embodiment of the present invention. 10... Ink ribbon for dry transfer material production 11... Ribbon base material 12... Pressure sensitive adhesive layer 13... Thermal transferable ink layer

Claims (1)

[Scope of Claims] 1. An ink ribbon for producing a dry transfer material that converts a transferred object into a dry transfer material by thermal transfer, comprising a pressure-sensitive adhesive layer provided on one side of a film-like ribbon base material; An ink ribbon for producing a dry transfer material, comprising: a heat transferable ink layer provided on a pressure adhesive layer and configured to include a colorant, a heat-sensitive adhesive resin, and a tackifying resin.