JP2022018482A - Sublimation type inkjet printing transfer paper and method for producing the same - Google Patents

Abstract

To provide sublimation type inkjet printing transfer paper which is excellent in adhesion to a transferred body, has good ink accepting properties and transfer suitability, and has less coating defects.SOLUTION: Sublimation type inkjet printing transfer paper has an ink accepting layer formed on one surface of base paper, in which the ink accepting layer contains an adhesive, a surfactant and a water-soluble polymer, the adhesive is a polyolefin-based resin, an HLB value of the surfactant is 10-20, and the water-soluble polymer is one or more of carboxymethyl cellulose, hydroxylated cellulose and polyvinyl alcohol.SELECTED DRAWING: None

Description

The present disclosure relates to a sublimation type inkjet printing transfer paper and a method for producing the same.

The transfer printing method includes a fusion type transfer printing method, a rubber print type transfer printing method, a sublimation type printing transfer method, etc., but it is possible to cope with a small lot of the required amount and to enable clear printing at high speed. Therefore, the sublimation type transfer printing method by the inkjet recording method is widely used. The sublimation type transfer printing method has the advantage of being able to print clear patterns with high resolution, which is difficult with other transfer methods. Applications are being developed for transcripts. It was necessary to improve the adhesion between the printed transfer paper and the transferred body in order to further improve the transfer efficiency for the transferred body having elasticity and uneven surface.

Patent Document 1 describes a sublimation type inkjet printing transfer paper in which a second coating layer containing a polyolefin-based emulsion and hydroxylated cellulose in a specific ratio is provided on a first coating layer containing inorganic particles and a binder. Has been done. Patent Document 2 describes an inkjet recording sheet in which an ink receiving layer containing a specific polymer compound is provided on a support in order to visually improve the whiteness and improve the color reproducibility. .. Patent Document 3 describes a textile printing paper in which a glue layer containing a water-soluble polyester binder and a natural adhesive is provided on the surface of the base paper.

Japanese Unexamined Patent Publication No. 2019-181805 Japanese Unexamined Patent Publication No. 11-058932 Japanese Unexamined Patent Publication No. 2016-104917

The sublimation type inkjet printing transfer paper described in Patent Document 1 has a structure in which an adhesive second coating layer is laminated on a first coating layer containing a receiving layer paint, so that it adheres to the transferred material. When the coating amount of the second coating layer is increased in order to improve the force, the function of the first coating layer is deteriorated, and the ink acceptability and the transferability are deteriorated. Further, in order to improve the ink acceptability and transferability of the first coating layer, it is necessary to reduce the coating amount of the second coating layer, but in this case, the adhesion to the transferred object is lowered. .. That is, in the configuration of the sublimation type inkjet printing transfer paper described in Patent Document 1, it is difficult to improve all of the adhesion to the transferred material, the ink acceptability, and the transferability. Further, in the sublimation type inkjet printing transfer paper described in Patent Document 1, since the first coating layer and the second coating layer need to be coated in different processes, the manufacturing process becomes complicated and there is room for improvement. was there.

The inkjet recording sheet described in Patent Document 2 has significantly different physical properties required as paper from the printing transfer paper, and it is difficult to divert it to the sublimation type inkjet printing transfer paper of the present invention.

The printing paper described in Patent Document 3 is also a printing paper used in a transfer method having a steaming or washing step, and a natural adhesive has a weak adhesive force with a transfer subject and is a sublimation type inkjet printing of the present invention. It is difficult to divert it to transfer paper.

An object of the present invention is to provide a sublimation type inkjet printing transfer paper having excellent adhesion to a transfer object, good ink acceptability and transfer suitability, and few coating defects.

The sublimation type inkjet printing transfer paper according to the present invention has an ink receiving layer formed on one surface of a base paper, and the ink receiving layer contains an adhesive, a surfactant, and a water-soluble polymer. The pressure-sensitive adhesive is a polyolefin-based resin, the HLB value of the surfactant is 10 to 20, and the water-soluble polymer is one or more of carboxymethyl cellulose, hydroxylated cellulose, and polyvinyl alcohol.

In the method for producing a sublimation type inkjet printing transfer paper according to the present invention, an ink prepared by mixing an adhesive and a surfactant and then further mixing a water-soluble polymer with the mixture to prepare an ink receiving layer coating liquid. The receiving layer coating liquid is applied to one side of the base paper, the pressure-sensitive adhesive is a polyolefin resin, the HLB value of the surfactant is 10 to 20, and the water-soluble polymer is carboxymethyl cellulose. It is characterized by being.

According to the present invention, it is possible to provide a sublimation type inkjet printing transfer paper having excellent adhesion to a transfer object, good ink acceptability and transfer suitability, and few coating defects.

The sublimation type inkjet printing transfer paper according to the present invention has an ink receiving layer formed on one side of a base paper. Hereinafter, the details of the base paper and the ink receiving layer will be described.

(Base paper: Raw material pulp)
As the raw material pulp constituting the base paper, for example, virgin pulp, used paper pulp, a combination of these pulps and the like can be used.

Examples of the virgin pulp include broad-leaved bleached kraft pulp (LBKP), coniferous bleached kraft pulp (NBKP), broad-leaved unbleached kraft pulp (LUKP), coniferous unbleached kraft pulp (NUKP), and broad-leaved semi-bleached kraft pulp (LSBKP). Chemical pulps such as coniferous semi-bleached kraft pulp (NSBKP), broadleaf tree sulfite pulp, and coniferous sulfite pulp; Stone Grand Pulp (SGP), Pressurized Stone Grand Pulp (TGP), Chemi Grand Pulp (CGP), Crushed Wood Pulp (GP), Mechanical pulp (MP) such as thermomechanical pulp (TMP) can be used alone or in combination of two or more.

The used paper pulp includes, for example, tea waste paper, kraft envelope waste paper, magazine waste paper, newspaper waste paper, leaflet waste paper, office waste paper, cardboard waste paper, upper white waste paper, Kent waste paper, imitation waste paper, ground ticket waste paper, and the like. , Dissolved / deinked recycled paper pulp (DIP), desorbed / deinked / bleached recycled paper pulp, etc. can be used alone or in combination of two or more.

(Base paper: Additive)
Additives can be added to the base paper if necessary.

Examples of additives include fillers, sizing agents, paper quality improvers, coagulants, defoamers, fluorescent whitening agents, sulfuric acid bands, yield improvers, drainage improvers, dry paper strength enhancers, and wet paper strength enhancers. Agents, coloring dyes, coloring pigments, water resistant agents and the like can be used alone or in combination of two or more.

(Base paper: Undercoat layer)
If necessary, the base paper may be provided with an undercoat layer containing a water-soluble polymer as a main component.

As the water-soluble polymer, for example, a natural polymer system can be used. Examples of the natural polymer system include enzymatically decomposed starch, oxidized starch, hydroxyethylated starch, cationized starch, urea-phosphorylated starch, and modified starch obtained by modifying raw starch such as corn, wheat, tapioca, and potato by various manufacturing methods. Oxidized starch, carboxymethyl cellulose (hereinafter, also referred to as “CMC”), carboxyethyl cellulose (CEC) and the like can be used alone or in combination of two or more. Further, the undercoat layer can contain, for example, additives such as a sizing agent, a water resistant agent, a coloring dye, a coloring pigment, an antifoaming agent, and a fluorescent whitening agent.

(Base paper: EST size)
As the base paper, the time until the ultrasonic transmission intensity of the initial water absorption characteristics of the base paper reaches 100% (hereinafter, also referred to as EST size degree) measured by a surface / size degree tester (EST12, manufactured by emtec) is determined. Use the one that is 0.01 to 3.00 seconds. As the base paper, those having an EST size of 0.50 to 2.00 seconds are more preferable, and those having an EST size of 0.80 to 1.80 seconds are more preferable. The EST size degree measured by the surface / size degree tester is a parameter indicating the permeability of the ink receiving layer paint to the base paper immediately after the coating of the ink receiving layer paint. When the EST size degree is less than 0.01 seconds, the ink receiving layer paint may excessively penetrate into the base paper, causing fine defects in the ink receiving layer and slightly reducing the image reproducibility. On the other hand, when the EST size exceeds 3.00 seconds, the ink receiving layer paint does not easily penetrate into the base paper, resulting in deterioration of the adhesion between the ink receiving layer and the base paper, resulting in a slight decrease in image reproducibility. there is a possibility. Therefore, in order to improve image reproducibility, it is preferable to use a base paper having an EST size in the range of 0.01 to 3.00 seconds. The EST size degree can be adjusted by combining, for example, the type of additive such as the sizing agent of the base paper, the amount of addition, the amount of coating of the undercoat layer, the type of additive, and the amount of addition.

(Under layer)
In the sublimation type inkjet printing transfer paper, an under layer containing carboxymethyl cellulose or the like may be formed between the sublimation type printing ink receiving layer and the base paper. Since the underlayer is formed, the wet paint becomes more familiar immediately after the mixed paint is applied, so that it is easy to obtain a continuous film without pinholes with a smaller amount of coating.

In addition to CMC, the underlayer paint for forming the underlayer includes, for example, starch derivatives such as starch, oxidized starch, cationized starch, etherified starch, and phosphate esterified starch, hydroxymethyl cellulose, and hydroxyethyl cellulose. , Cellulose derivatives such as cellulose sulfate, polyvinyl alcohols of various degrees of saponification (hereinafter, also referred to as "PVA") and various PVA derivatives such as silanol modified products, carboxylates and cationized products, caseins, gelatins, modified gelatins, soybean proteins. It may contain components such as water-soluble natural polymer compounds such as polyvinylpyrrolidone, sodium polyacrylate, sodium salt of styrene-maleic anhydride copolymer, and water-soluble synthetic polymer compounds such as sodium polystyrene sulphonate. There is no particular limitation as long as the effect of providing the under layer is not impaired.

Further, the same paint as the ink receiving layer paint may be used as the underlayer paint. In this case, the coating defect can be sufficiently prevented with a smaller amount of coating than when the ink receiving layer paint is applied once, and the coating suitability is excellent.

When forming the under layer, the amount of the under layer paint applied (after drying) is 3.0 g / m ² or less. If the amount of the underlayer paint applied (after drying) exceeds 3.0 g / m ² , the air permeability becomes too high, blister is generated during printing transfer, and the reproducibility of the transferred image deteriorates at the blister generation location. do.

(Ink receiving layer)
The ink receiving layer comprises an ink receiving layer paint containing a pressure-sensitive adhesive, a water-soluble polymer, and a surfactant.

(Adhesive)
As the pressure-sensitive adhesive, a polyolefin-based resin can be preferably used. The polyolefin-based resin melts due to the heat during printing transfer and exhibits adhesiveness and plasticity to the transferred material. When the ink receiving layer contains a polyolefin resin, the adhesion between the sublimation type inkjet printing transfer paper and the transfer paper at the time of printing transfer is improved, and the displacement of the transferred image to the transferred material can be prevented. In the present specification, the polyolefin-based resin is a polymer obtained by polymerizing olefins such as polyethylene and polypropylene, and not only a homopolymer of one type of olefin but also two or more types of olefins having different carbon chain lengths are copolymerized. It also contains a copolymer obtained by copolymerizing an olefin with an acrylic monomer such as acrylic acid or methacrylic acid. The average weight and average molecular weight of the polyolefin resin is preferably about 30,000 to 40,000 from the viewpoint of adhesion. Further, since the pressure-sensitive adhesive is applied as a water-based ink receiving layer paint, it is preferable to use a polyolefin-based resin dispersed in water.

(Water-soluble polymer)
The water-soluble polymer has a function of capturing and absorbing sublimation type printing ink and a function of a binder. The ink receiving layer contains one or more of carboxymethyl cellulose (CMC), hydroxylated cellulose and polyvinyl alcohol (PVA) as a water-soluble polymer. Examples of the hydroxylated cellulose include hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and the like. Other water-soluble polymers include, for example, starch derivatives such as oxidized starch, cationized starch, etherified starch, and phosphate esterified starch, cellulose derivatives such as cellulose sulfate, silanol modified products thereof, carboxylated compounds, casein, gelatin, and the like. Selected from water-soluble natural polymer compounds such as modified gelatin and soybean protein, and water-soluble synthetic polymer compounds such as polyvinylpyrrolidone, sodium polyacrylate, sodium salt of styrene-maleic anhydride copolymer, and sodium polystyrene sulphonate. One or more of them can be used together. From the viewpoint of ink acceptability required for inkjet printing transfer paper, it is preferable to use carboxymethyl cellulose.

The content of the water-soluble polymer in the ink receiving layer is preferably 20 to 50 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive. If the content of the water-soluble polymer is less than 20 parts by mass with respect to 100 parts by mass of the adhesive, the ink acceptability may be insufficient, and if it exceeds 50 parts by mass, the adhesiveness is insufficient. There is a possibility of becoming. That is, since the content of the water-soluble polymer is 20 to 50 parts by mass with respect to 100 parts by mass of the adhesive, the ink acceptability required for the inkjet printing transfer paper and the adhesion for preventing the transfer deviation are prevented. It is possible to achieve both sex and sex. The content of the water-soluble polymer in the ink receiving layer is more preferably 25 to 45 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive.

(Surfactant)
When the pressure-sensitive adhesive and the water-soluble polymer are mixed when preparing the ink receiving layer paint, the pressure-sensitive adhesive and the water-soluble polymer aggregate. When the ink receiving layer paint contains agglomerates, the screen (filter) of the coating device of the ink receiving layer paint is clogged, which makes it difficult to stably produce the sublimation type inkjet printing transfer paper. Further, if the ink receiving layer paint contains agglomerates, uneven coating of the ink receiving layer paint may occur, or defects called streaks or scratches may occur in the dried ink receiving layer. When the amount of the adhesive is reduced, the aggregation is reduced, but the adhesiveness of the sublimation type inkjet printing transfer paper is also reduced.

Therefore, a surfactant is added to the ink receiving layer (ink receiving layer coating material) according to the present embodiment. As the surfactant, a compound having an HLB (Hydrophilic-Lipopicular Balance) value of 10 to 20 can be preferably used. By blending a surfactant having an HLB value of 10 to 20 in the ink receiving layer paint, aggregation of the water-soluble polymer and the pressure-sensitive adhesive can be suppressed. The HLB value of the surfactant is preferably 13 to 20, more preferably 16 to 20. By using a surfactant having a higher HLB value, the dispersibility of the pressure-sensitive adhesive made of a polyolefin resin in water can be improved.

The type of surfactant is not particularly limited, and any of nonionic surfactant, anionic surfactant, cationic surfactant, and amphoteric surfactant can be used, and among them, nonionic (nonionic) surfactant. Is preferable because it has an excellent effect of suppressing aggregation of the pressure-sensitive adhesive made of a water-soluble polymer and a polyolefin-based resin. Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene dialkyl ethers, polyoxyethylene fatty acid esters, glycerin fatty acid esters, sucrose fatty acid esters, and the like. Not limited to.

The content of the surfactant in the ink receiving layer is preferably 5 to 15 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive. When the content of the surfactant is less than 5 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive, the effect of suppressing aggregation between the water-soluble polymer and the pressure-sensitive adhesive may be insufficient, and exceeds 15 parts by mass. In that case, there is a possibility that the adhesive strength at the time of printing transfer is lowered, or the ink bleeding at the time of printing by the inkjet method occurs.

(Other additives)
The ink receiving layer can contain additives such as inorganic fine particles, an ink fixing agent, a sizing agent, a coloring dye, a coloring pigment, an antifoaming agent, a fluorescent whitening agent, a viscosity modifier, and a lubricant.

As inorganic fine particles, light calcium carbonate, heavy calcium carbonate, kaolin, silica particles, clay, magnesium carbonate, magnesium hydroxide, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, The ink receiving layer contains at least one of aluminum silicate, calcium sulphate, calcium sulphate, magnesium silicate, alumina, colloidal alumina, alumina hydrate (pseudo-boehmite, etc.), aluminum hydroxide, lithopon, zeolite, hydrohaloicite, etc. Can be done.

Further, as the ink fixing agent, a polyamine epichlorohydrin-based compound can be preferably used from the viewpoint of high stability even in a highly viscous paint.

(Production method)
The sublimation type inkjet printing transfer paper according to the present embodiment can be manufactured by preparing an ink receiving layer paint, applying the prepared ink receiving layer paint to one side of the base paper, and drying the coating film. ..

The ink receiving layer paint can be prepared by adding a surfactant into the dispersion of the pressure-sensitive adhesive in the mixing tank, stirring and mixing, and then further adding a water-soluble polymer to the mixture and stirring. can. By mixing the pressure-sensitive adhesive and the surfactant before mixing the pressure-sensitive adhesive and the water-soluble polymer, the surface of the pressure-sensitive adhesive is covered with the surfactant, and the water-soluble polymer is highly water-soluble even if it is added. It is considered that the aggregation of the pressure-sensitive adhesive and the water-soluble polymer is suppressed by suppressing the interaction between the polar functional group of the molecule and the pressure-sensitive adhesive. On the other hand, when the water-soluble polymer is added to the dispersion liquid of the pressure-sensitive adhesive, or when the dispersion liquid of the pressure-sensitive adhesive is added to the water-soluble polymer, aggregation of the pressure-sensitive adhesive and the water-soluble polymer proceeds. Even if a surfactant is mixed after that, the ink receiving layer paint cannot be made into a state without aggregation.

The median diameter D50 of the fine particles contained in the ink receiving layer paint is preferably 0.5 to 20 μm. The median diameter D50 of the fine particles contained in the ink receiving layer paint is an index indicating the degree of aggregation of the pressure-sensitive adhesive and the water-soluble polymer, and if the median diameter D50 of the fine particles contained in the ink receiving layer paint is 20 μm or less, It is possible to suppress clogging of the screen of the coating apparatus described above, poor coating, defects of the ink receiving layer, and the like. The lower limit of the median diameter D50 of the fine particles contained in the ink receiving layer paint is not particularly limited, but since the ink receiving layer paint contains fine particles of a polyolefin resin which is an adhesive, the lower limit is the particles of the adhesive fine particles. The value reflects the diameter. The median diameter D50 shown here is measured using a laser diffraction / scattering type particle size distribution measuring device (manufactured by Microtrac Bell Co., Ltd., product name: HRA MT3300).

The coating method of the ink receiving layer is not particularly limited, but coating can be performed using a coating machine such as a rod coater, a blade coater, or an air knife coater.

The coating amount of the ink receiving layer is preferably 2.0 to 12.0 g / m ² per side, and 3.0 to 10.0 g / m, from the viewpoint of suppressing ink strike-through and achieving both ink drying property. ² is more preferable, and 4.0 to 8.0 g / m ² is even more preferable.

(Sublimation type inkjet printing transfer paper)
The adhesive strength between the sublimation type inkjet printing transfer paper and the polyester fabric after the sublimation type inkjet printing transfer paper and the polyester fabric according to the present embodiment are overlapped and heat-pressed at 200 ° C. for 30 seconds is 0.15 to 2N / 100 mm. Is preferable. If the adhesive strength is within this range, it is possible to maintain the adhesion between the sublimation type inkjet printing transfer paper and the transfer paper during printing transfer and suppress the positional deviation between the two, and when the sublimation type inkjet printing transfer paper is peeled off after printing transfer. In addition, the transfer of the adhesive to the transferred body can be suppressed. Even within the above range, the adhesive strength of the sublimation type inkjet printing transfer paper and the polyester fabric after hot pressing at 200 ° C. for 30 seconds is more preferably 0.2 to 1N / 100 mm, more preferably 0.3 to 0. It is more preferably 6N / 100 mm.

(Back coat layer)
A backcoat layer may be provided on the other side of the base paper of the sublimation type inkjet printing transfer paper according to the present embodiment, that is, on the side opposite to the side on which the ink receiving layer is formed. Having a back coat layer has the effect of preventing the sublimation gas during printing transfer from escaping to the paper surface side. In addition, the difference in water content between the front and back can be adjusted, and the curl height can be further reduced.

The backcoat layer preferably contains delaminated kaolin having a median diameter D50 in the range of 1.50 to 3.00 μm as inorganic particles and having an aspect ratio of more than 20. The particle diameter (median diameter d50) of the inorganic particles shown here is measured using a laser diffraction / scattering type particle diameter distribution measuring device (manufactured by Microtrac Bell, product name: MT3300).

Other inorganic particles include kaolin, silica particles, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, magnesium hydroxide, talc, calcium sulfate, barium sulfate, as long as the effect of sublimation type inkjet printing transfer paper is exhibited. Titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, silica soil, calcium silicate, magnesium silicate, alumina, colloidal alumina, alumina hydrate (pseudo-boehmite, etc.), aluminum hydroxide, lithopon, zeolite, It can contain an inorganic pigment such as hydrated halloysite. These can be used alone or by appropriately selecting two or more kinds.

The backcoat layer preferably contains tapioca starch and SB latex as a binder. Further, it is preferable that the backcoat layer contains polyethylene glycol (hereinafter, also referred to as PEG).

(Air permeability)
The air permeability of the sublimation type inkjet printing transfer paper according to the present embodiment is preferably 100 to 10,000 seconds, more preferably 500 to 1,500 seconds. The air permeability is a measured value measured in accordance with JIS P 8117 (2009). When the air permeability value is within this range, the sublimated ink can be transferred well from the ink receiving layer to the transfer target, and the sublimated ink can be discharged to the back surface side of the base paper. It can be suppressed. If the air permeability is less than 100 seconds, the sublimated ink escapes to the back surface side of the paper and stains the heat roll or hot plate for transfer, which is not preferable. On the other hand, when the air permeability exceeds 10,000 seconds, the moisture in the ink receiving layer does not penetrate into the base paper and the dryness deteriorates, and the moisture in the ink receiving layer does not escape during thermal transfer, which may cause blister or the like. It is not preferable because it has sex.

As described above, in the sublimation type inkjet printing transfer paper according to the present embodiment, since the ink receiving layer contains a polyolefin resin as an adhesive, the transfer paper has excellent adhesiveness at the time of printing transfer, and the transferred body has elasticity. Even if it is a cloth material, it is possible to suppress the transfer deviation of the pattern. Further, since the sublimation type inkjet printing transfer paper according to the present embodiment has a structure in which one ink receiving layer is provided on one side of the base paper, the surface of the layer having ink acceptability is imparted with adhesiveness. Ink acceptability and transferability can be improved, the number of steps during manufacturing can be reduced, and the production efficiency can be improved, as compared with the configuration in which the layers for the purpose are laminated. Further, since the ink receiving layer is formed of a paint containing a pressure-sensitive adhesive, a water-soluble polymer and a surfactant, sublimation type inkjet printing with few coating defects caused by agglomerates of the pressure-sensitive adhesive and the water-soluble polymer. It can be a transfer paper.

Hereinafter, an example in which the sublimation type inkjet printing transfer paper according to the present invention is specifically carried out will be described. However, the present invention is not limited to these examples.

<Manufacturing example of base paper>
Heavy calcium carbonate and talc were added as fillers to a mixture of 80% by mass of LBKP and 20% by mass of NBKP so that the ash content was 8.0%, and as an additive, with respect to 100% by mass of the total amount of kraft pulp. , 0.8% by mass of cationized starch, 0.3% by mass of alkyl ketene dimer (internal addition sizing agent), and 0.3% by mass of anion-modified polyacrylic amide were added to prepare a paper material. The time required for the ultrasonic transmission intensity of the initial water absorption characteristics to reach 100% (EST size degree) measured by a surface / size degree tester (EST12, manufactured by emtec) after making this paper material with a paper machine is 1.50 seconds. I got the base paper.

The following materials were used as components of the ink receiving layer paint.
(Adhesive)
Polyolefin resin (ethylene-methacrylic acid copolymer) emulsion (water-soluble polymer)
・ CMC: FINFIX (manufactured by Sansho Co., Ltd.)
-Hydroxylated cellulose: SANHEC (manufactured by Sansho Co., Ltd.)
・ PVA: Kuraray Poval 105 (manufactured by Kuraray Co., Ltd.)
(Surfactant)
・ Polyoxyethylene alkyl ether

(Examples 1 to 10 and Comparative Example 2)
After adding and mixing the number of parts of the surfactant shown in Table 1 with 100 parts by mass of the pressure-sensitive adhesive dispersed in water, the number of parts of the water-soluble polymer shown in Table 1 is further added and mixed to form an ink. A receiving layer paint was prepared. The unit (number of copies) of the content shown in Table 1 is parts by mass, and the values of the pressure-sensitive adhesive and the water-soluble polymer indicate the content ratio in terms of solid content. An ink receiving layer paint was applied to one surface of the base paper using a rod coater and dried to form an ink receiving layer. The amount of the ink receiving layer paint applied (after drying) was as shown in Table 1.

(Comparative Example 3)
An undercoat paint was prepared by mixing 8.0 parts by mass of EVA, 4.0 parts by mass of PVA, and 12.0 parts by mass of an ink fixing agent with 100 parts by mass of light calcium carbonate. An undercoat paint was applied to one side of the base paper using a rod coater and dried to form an undercoat coating layer, and an adhesive was further applied to the upper layer using a rod coater to form an adhesive layer. .. The amount of the undercoat paint applied (after drying) was 5.0 g / m ² (after drying), and the amount of the adhesive applied was 7.0 g / m ² .

(Comparative Example 1)
The number of parts of the water-soluble polymer shown in Table 1 was added to 100 parts by mass of the pressure-sensitive adhesive dispersed in water and mixed to prepare an ink receiving layer paint. An ink receiving layer paint was applied to one surface of the base paper using a rod coater and dried to form an ink receiving layer. The amount of the ink receiving layer paint applied (after drying) was as shown in Table 1.

(Comparative Example 4)
An adhesive was added to the water-soluble polymer dissolved in water and mixed to prepare an ink receiving layer paint. The blending amount of the water-soluble polymer was the number of parts shown in Table 1 with respect to 100 parts by mass of the pressure-sensitive adhesive. An ink receiving layer paint was applied to one surface of the base paper using a rod coater and dried to form an ink receiving layer. The amount of the ink receiving layer paint applied (after drying) was as shown in Table 1.

Table 1 also shows the median diameter D50 of the fine particles contained in the coating liquid and the presence or absence of aggregation at the time of adjusting the ink receiving layer paint. The median diameter D50 is measured using a laser diffraction / scattering type particle size distribution measuring device (manufactured by Microtrac Bell, product name: HRA MT3300). The presence or absence of agglomeration was determined by visually observing the stainless steel screen mesh after pouring the above coating liquid into the stainless steel screen mesh (250 lines / inch), adding water and filtering, and according to the following criteria. Evaluated.
⊚: No residue is observed on the screen mesh.
◯: Almost no residue is observed on the screen mesh.
Δ: A small amount of residue is observed on the screen mesh.
X: A large amount of residue is observed on the screen mesh. Or, the coating liquid does not pass through the screen mesh.

The obtained sublimation type inkjet printing transfer paper was evaluated by the following method.

(1) Blurring Inkjet printer (manufactured by Seiko Epson Corporation, SC-F9350) and sublimation type printing ink (manufactured by Seiko Epson Corporation, SC5HDK100P (black), SC5C100P (cyan), SC5M100p (magenta), SC5Y100P (yellow) ) Was used to print a model image on a sublimation type inkjet printing transfer paper at 720 dpi × 720 dpi. The printed surface of the sublimation type inkjet printing transfer paper was visually observed, and the presence or absence of bleeding was evaluated according to the following evaluation criteria.
⊚: No bleeding.
◯: Slight bleeding is observed, but there is no problem in practical use.
X: Blurring is conspicuously recognized.

(2) Dryness Inkjet printer (manufactured by Seiko Epson Corporation, SC-F9350) and sublimation type printing ink (manufactured by Seiko Epson Co., Ltd.), SC5HDK100P (black), SC5C100P (cyan), SC5M100P (magenta), SC5Y100P (yellow) ) Was used to perform solid printing of 100% black on a sublimation type inkjet printing transfer paper at 720 dpi × 720 dpi. One minute after printing, when the printed surface was rubbed with tissue paper and wiped off, the presence or absence of ink elongation on the paper surface was visually confirmed and evaluated according to the following evaluation criteria.
⊚: Drying is very quick, and there is no ink spread on the paper surface after wiping.
◯: Drying is a little slow, and ink growth is slightly observed on the paper surface after wiping, but there is no problem in practical use.
X: Drying is slow, and ink spread is observed on the paper surface after wiping.

(3) Bleed-through After solid printing four colors of CMYK on sublimation type inkjet printing transfer paper with an inkjet printer, it was printed by superimposing it on a polyester fabric and hot-pressing it with a flatbed transfer machine at 200 ° C. for 90 seconds. The image was transferred to the polyester fabric. A plain paper was interposed between the sublimation type inkjet printing transfer paper and the hot plate. After the transfer, the presence or absence of ink adhesion to the intervening plain paper was visually confirmed and evaluated based on the following evaluation criteria.
⊚: No ink adhesion to the intervening plain paper is observed.
◯: Adhesion of ink to the intervening plain paper is observed, but the amount of adhesion is not a problem in practical use. X: Adhesion of ink to the intervening plain paper is remarkably observed, which is a practical problem.

(4) Concentration The color density of CMYK of the polyester fabric to which the image was transferred in the above evaluation item (3) was measured using a densitometer (FD-5 manufactured by Konica Minolta Japan Co., Ltd.) and evaluated according to the following evaluation criteria. did.
⊚: High transfer concentration to cloth material.
◯: The transfer concentration to the cloth material is lower than that of “Evaluation ◎”, but there is no problem in practical use.
× The transfer concentration to the cloth material is low, and there is a problem in practical use.

(5) Ghost The polyester fabric to which the image was transferred in the above evaluation item (3) was visually observed, and the presence or absence of transfer deviation (ghost) was evaluated according to the following criteria.
⊚: There is no transfer deviation.
◯: A slight transfer deviation is observed, but there is no problem in practical use.
X: Transfer misalignment is conspicuously recognized.

(6) Layer peeling The polyester fabric to which the image was transferred in the above evaluation item (3) was visually observed, and the presence or absence of the layer (ink receiving layer or adhesive layer) peeled from the base paper was evaluated according to the following criteria.
⊚: No layer left after peeling from the base paper remains.
◯: A small amount of the layer peeled off from the base paper remains, but there is no problem in practical use.
Δ: The layer peeled off from the base paper remains.

(6) Heat seal strength A sublimation type inkjet printing transfer paper cut into a width of 100 mm and a flow direction of 150 mm was superposed on a polyester fabric of the same size, and heat-pressed with a flatbed transfer machine at 200 ° C. for 30 seconds. After the sublimation type inkjet printing transfer paper was left to be sealed on the polyester fabric for 5 minutes, a tensile tester (manufactured by Toyo Seiki Seisakusho Co., Ltd .: Strograph ES) was used to set the tensile speed to 0.5 mm / min. The character was peeled off and the heat seal strength was measured.

The ink receiving layer of the sublimation type inkjet printing transfer paper was visually confirmed, and the presence or absence of coating defects such as streaks and scratches was evaluated according to the following criteria.
⊚: There is no coating defect in the ink receiving layer.
◯: A slight coating defect is observed in the ink receiving layer, but it is not conspicuous.
Δ: Coating defects are observed in the ink receiving layer, but there is no problem in practical use.
X: Coating defects are conspicuously observed in the ink receiving layer.

Table 2 shows the evaluation results of the sublimation type inkjet printing transfer paper according to Examples 1 to 10 and Comparative Examples 1 to 4.

The sublimation type inkjet printing transfer papers according to Examples 1 to 10 had less bleeding during printing with an inkjet printer, had excellent drying properties, and had good ink acceptability. In addition, since there is little ink strike through during printing transfer, the image transfer density to the fabric is high, and the heat seal strength (adhesive strength) is good, ghosts and layer peeling during transfer are suppressed. , The transfer suitability was good. Further, the coating defects of the ink receiving layer were extremely few, and even in Example 8 in which the coating defects were recognized, there was no problem in practical use. Therefore, according to the present invention, it has been confirmed that a sublimation type inkjet printing transfer paper having excellent adhesion to a transfer object, good ink acceptability and transfer suitability, and few coating defects can be realized. Further, as shown in Table 1, in Examples 1 to 10, no agglomeration of the paint was observed to some extent in terms of use when the ink receiving layer paint was prepared.

On the other hand, in Comparative Example 1, since the surfactant is not blended, the adhesive and the water-soluble polymer aggregate to form a large amount of agglomerates when the ink receiving layer paint is prepared, and the ink receiving layer is coated. Defects were noticeably recognized.

In Comparative Example 2, since the surfactant having an HLB value of less than 10 was used, the effect of suppressing the aggregation of the pressure-sensitive adhesive and the water-soluble polymer was not sufficient, and the pressure-sensitive adhesive and the water-soluble polymer aggregated when the ink receiving layer paint was prepared. As a result, a large amount of agglomerates were generated, and coating defects were conspicuously observed in the ink receiving layer.

In Comparative Example 3, the undercoat coating layer (ink receiving layer) and the adhesive layer are formed as separate layers, and the adhesive layer is laminated on the undercoat coating layer. Therefore, the ink acceptability of the undercoat coating layer The transfer density of the image to the fabric after the printing transfer was also low.

In Comparative Example 4, since the surfactant was not blended, the pressure-sensitive adhesive and the water-soluble polymer aggregated to generate a large amount of agglomerates when the ink receiving layer paint was prepared, and coating defects were conspicuously observed in the ink receiving layer. Was done.

The present invention can be used as a sublimation type inkjet printing transfer paper for transferring a pattern to a cloth material (particularly suitable for a material exhibiting elasticity), and has excellent adhesion to a transferred object. Since the transfer density is improved, printing unevenness can be reduced, and high-speed printing is possible (good ink drying property), it can be suitably used for sublimation type inkjet printing transfer paper.

Claims (8)

An ink receiving layer is formed on one side of the base paper,
The ink receiving layer contains a pressure-sensitive adhesive, a surfactant, and a water-soluble polymer.
The pressure-sensitive adhesive is a polyolefin-based resin.
The HLB value of the surfactant is 10 to 20, and the HLB value is 10 to 20.
A sublimation type inkjet printing transfer paper, wherein the water-soluble polymer is one or more of carboxymethyl cellulose, hydroxylated cellulose, and polyvinyl alcohol. The sublimation type inkjet printing transfer paper according to claim 1, wherein the content of the surfactant is 5 to 15 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive. The sublimation type inkjet printing transfer paper according to claim 1 or 2, wherein the surfactant is a nonionic surfactant. The sublimation type inkjet printing transfer paper according to any one of claims 1 to 3, wherein the content of the water-soluble polymer is 20 to 50 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive. 7. Sublimation type inkjet printing transfer paper. The adhesive strength between the sublimation type inkjet printing transfer paper and the polyester fabric after the sublimation type inkjet printing transfer paper and the polyester fabric are overlapped and heat-pressed at 200 ° C. for 30 seconds is 0.15 to 2.0 N / 100 mm. The sublimation type inkjet printing transfer paper according to any one of claims 1 to 5 as described above. After mixing the pressure-sensitive adhesive and the surfactant, a water-soluble polymer is further mixed with the mixture to prepare an ink receiving layer coating liquid, and the prepared ink receiving layer coating liquid is applied to at least one side of the base paper. , A method for manufacturing sublimation type inkjet printing transfer paper.
The pressure-sensitive adhesive is a polyolefin-based resin.
The HLB value of the surfactant is 10 to 20, and the HLB value is 10 to 20.
A method for producing a sublimation type inkjet printing transfer paper, wherein the water-soluble polymer is carboxymethyl cellulose, hydroxylated cellulose, or polyvinyl alcohol. The sublimation type according to claim 7, wherein the ink receiving layer coating liquid contains fine particles containing an adhesive, and the median diameter D50 of the fine particles contained in the ink receiving layer coating liquid is 0.5 to 20 μm. A method for manufacturing inkjet printing transfer paper.