WO2013141023A1 - 液圧転写用ベースフィルム - Google Patents
液圧転写用ベースフィルム Download PDFInfo
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- WO2013141023A1 WO2013141023A1 PCT/JP2013/056147 JP2013056147W WO2013141023A1 WO 2013141023 A1 WO2013141023 A1 WO 2013141023A1 JP 2013056147 W JP2013056147 W JP 2013056147W WO 2013141023 A1 WO2013141023 A1 WO 2013141023A1
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- film
- hydraulic transfer
- base film
- transfer
- liquid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/175—Transfer using solvent
Definitions
- the present invention relates to a base film for hydraulic transfer for forming a film for hydraulic transfer used when printing on a transferred body such as a molded body having an uneven three-dimensional surface or curved surface, and formed therefrom.
- the present invention relates to a hydraulic transfer film and a hydraulic transfer method using the hydraulic transfer film.
- a means for forming a printed layer for imparting design properties or improving surface physical properties on the surface of a molded body having uneven three-dimensional surfaces or curved surfaces it is suitable for transfer onto a water-soluble or water-swellable film surface.
- a method using a hydraulic transfer film on which a printing layer is formed is known. For example, in Patent Document 1, after floating on the liquid surface of a liquid represented by water with the printing surface of the hydraulic transfer film facing up, various molded bodies that are transferred bodies are pushed in from above. In addition, a method for transferring a printing layer to the surface of a transfer medium using hydraulic pressure is described.
- Patent Document 3 discloses beautiful transfer printing by effectively preventing curling of the peripheral edge of a thin film when a water-soluble polymer thin film is floated on the surface of the water to perform transfer printing on an object. In order to achieve this, it is described to use a thin film provided with a large number of small holes in the shape of a circle or a square at the end.
- a liquid that can sufficiently prevent curling when it floats on the liquid surface by means different from the method described in Patent Document 3 and can form a hydraulic transfer film excellent in transfer efficiency. It is an object of the present invention to provide a pressure transfer base film, a fluid pressure transfer film formed therefrom, and a fluid pressure transfer method using the fluid pressure transfer film.
- the present inventors have used a linear notch that is relatively easy to form at the end of the hydraulic transfer base film in advance.
- the present inventors have found that curling when the film for hydraulic transfer formed above is floated on the surface of a liquid typified by water is highly suppressed.
- the present inventors have further studied based on the findings and completed the present invention.
- the present invention [1] Base film for hydraulic transfer having a linear cut at the end, [2] The hydraulic transfer base film according to the above [1], having linear notches at a rate of 7 mm or more per 100 mm length of the end of the hydraulic transfer base film, [3] The base film for hydraulic transfer according to the above [1] or [2], having a linear notch within a range of 1 to 10 mm from the end of the base film for hydraulic transfer, [4] A hydraulic transfer base film as described in any one of [1] to [3], which is a polyvinyl alcohol film, [5] A hydraulic transfer film obtained by printing on the surface of the hydraulic transfer base film of any one of [1] to [4] above, [6] A liquid having a step of floating the hydraulic transfer film of [5] above on the liquid surface with the printed surface facing upward, and a step of pressing a transfer medium from above the floated hydraulic transfer film Pressure transfer method, About.
- the base film for hydraulic transfer which can fully form the film for hydraulic transfer which can prevent the curling when it floats on the liquid level and is excellent in transfer efficiency, and the hydraulic transfer formed from it Film and a hydraulic transfer method using the hydraulic transfer film are provided.
- the base film for hydraulic transfer of the present invention has a linear cut at the end (portion near the end of the base film for hydraulic transfer). By having a linear cut at the end, curling when the hydraulic transfer film formed therefrom is floated on the liquid surface can be sufficiently prevented.
- the present invention is not limited in any way, it is considered that the reason is that even when curl is generated from the end of the hydraulic transfer film, the curling stops due to the cut.
- the linear cuts are relatively easy to form, and the hydraulic transfer base film can be manufactured with high productivity.
- it has an advantage that it is difficult to occur, and the vicinity where the linear cut is formed can contribute to the hydraulic transfer, and the reduction of the effective area of the hydraulic transfer film can be reduced.
- a general base film for hydraulic transfer may be a long film or a rectangular film, and in the case of a long film, the roll film is continuously rolled.
- the film can be printed on the surface while being fed out to form a hydraulic transfer film, and the film can be taken out as it is or once after being wound up in a roll, and continuously supplied to the hydraulic transfer.
- the shape is a rectangular film having a relatively short length (for example, each side is less than 1 m), even if the shape is a long film.
- it may be any, and may be a polygonal shape such as a triangle or a pentagon, or a circular shape, but a long film and a rectangular film are preferable from the viewpoint of handling at the time of hydraulic transfer, and printing or Considering the point that hydraulic transfer can be continuously performed, a long film is preferable.
- the length and width of the long film are not particularly limited, but from the viewpoint of productivity during printing, the length is preferably 1 m or more, more preferably 100 m or more, and 1000 m or more. Is more preferable. Moreover, as an upper limit of length, 10000 m is mentioned, for example. On the other hand, from the viewpoint of improving productivity during printing, the width is preferably 50 cm or more, more preferably 80 cm or more, and further preferably 100 cm or more. The width is preferably 4 m or less, more preferably 3 m or less because production of a hydraulic transfer base film having a uniform thickness is easy.
- the base film for hydraulic transfer of the present invention has a linear cut at the end.
- the hydraulic transfer base film of the present invention is relatively long.
- a linear notch may be provided only at the end portions in the vicinity of two opposite sides of the four sides.
- the entire end portion along the entire end of the base film for hydraulic transfer that contacts the liquid surface at the time of hydraulic transfer is linearly viewed macroscopically. It is preferable to have a notch.
- the hydraulic transfer base film of the present invention is a rectangular film having a relatively short length
- the above-mentioned linear notch may be one that penetrates in the thickness direction of the hydraulic transfer base film, or may be one that opens only on one surface of the hydraulic transfer base film, Since the slit can be easily formed and the effect of preventing curling is more remarkable, the linear slit is preferably penetrated in the thickness direction of the hydraulic transfer base film. In addition, even when the film is opened only on one surface of the hydraulic transfer base film, when the thickness of the non-penetrating portion is made extremely thin, the resulting hydraulic transfer film is floated on the liquid surface. It can be penetrated within a few seconds (for example, within 3 seconds), and such a notch is also one of preferred embodiments.
- FIG. 1 is a schematic view showing an example of a case where the hydraulic transfer base film is a long film and has a linear notch over the entire ends near two long sides.
- a linear cut 4 is formed.
- each linear notch 4 is linear when viewed from the film surface side, and a plurality of notches 4 are intermittently present in the direction along the end 2 of the base film 1 for hydraulic transfer.
- the length is preferably in the range of 3 to 50 mm and more preferably in the range of 7 to 35 mm because curling can be more effectively prevented. More preferably, it is within the range of 10 to 25 mm.
- the line width of the opening portion of the linear notch is usually less than 200 ⁇ m, preferably not more than 150 ⁇ m, more preferably not more than 100 ⁇ m, further preferably not more than 70 ⁇ m, and opposed to the notches.
- the cross sections may be in contact with each other at least in part.
- each linear notch exists substantially parallel to the end of the base film for hydraulic transfer (if the end is not a straight line, the tangent at the point on the end closest to the target notch).
- substantially parallel to the end of the hydraulic transfer base film means not only the case where the angle between the end of the hydraulic transfer base film and the linear cut is 0 °, but also a slight deviation ( Preferably within ⁇ 30 °, more preferably within ⁇ 10 °).
- the line segment connecting the end points of the individual line cuts (the line having the maximum length when there are multiple cuts) It is preferable that any one line segment) is substantially parallel to the end of the hydraulic transfer base film.
- the base film for hydraulic transfer of the present invention preferably has the above-mentioned linear cut as close to the end as possible in order to reduce the curl area ratio described later.
- the distance from the end of the hydraulic transfer base film to the linear cut is preferably 10 mm or less, more preferably 8 mm or less, and even more preferably 6 mm or less.
- the distance from the end is too short, the curling prevention effect may be reduced, and therefore the distance is preferably 1 mm or more.
- the distance from the end to the linear cut refers to the shortest distance (shortest distance) among the distances between the points on the linear cut and the ends.
- the base film for hydraulic transfer of the present invention can more effectively prevent curling, it preferably has the above-mentioned linear cut at a rate of 7 mm or more per 100 mm length of the end. It is more preferable to have the above-mentioned linear cut at a ratio of. In addition, from the viewpoint of the strength of the base film for hydraulic transfer, it is preferable to have the above-mentioned linear cut at a rate of 50 mm or less per 100 mm of the end length. As shown in FIG. 2, the above ratio is obtained when a linear notch 4 (or the whole when there are plural) is projected onto the end 2 of the hydraulic transfer base film in the vertical direction on the paper surface. After the total length of the line segments to be obtained (the total of the length L1 and the length L2 in FIG. 2) is divided by the length of the end 2, it can be calculated as a value per 100 mm of the length of the end 2.
- a material constituting the base film for hydraulic transfer of the present invention a material in which the obtained base film for hydraulic transfer becomes water-soluble can be used.
- polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, Polyvinyl pyrrolidone, polyacrylic acid or salts thereof, starch, gelatin, etc. are mentioned, but it is relatively easy to change various conditions such as polymerization degree, saponification degree, blending of additives such as starch, etc.
- Polyvinyl alcohol is preferable because it can control mechanical strength and moisture resistance during handling.
- the base film for hydraulic transfer is a polyvinyl alcohol (hereinafter, “polyvinyl alcohol” may be abbreviated as “PVA”) film
- the PVA includes vinyl acetate, vinyl formate, vinyl propionate, vinyl butyrate, It is obtained by saponifying a polyvinyl ester obtained by polymerizing one or more vinyl esters such as vinyl pivalate, vinyl versatate, vinyl laurate, vinyl stearate, vinyl benzoate and isopropenyl acetate. Things can be used.
- vinyl esters vinyl acetate is preferable from the viewpoints of ease of production of PVA, availability, cost, and the like.
- the polyvinyl ester is preferably obtained using only one or two or more vinyl esters as monomers, and more preferably obtained using only one vinyl ester as a monomer. However, as long as it does not impair the effects of the present invention, it may be a copolymer of one or more vinyl esters and other monomers copolymerizable therewith.
- Examples of the other monomer copolymerizable with the vinyl ester include ⁇ -olefins having 2 to 30 carbon atoms such as ethylene, propylene, 1-butene, and isobutene; (meth) acrylic acid or a salt thereof; (Meth) methyl acrylate, (meth) ethyl acrylate, (meth) acrylate n-propyl, (meth) acrylate i-propyl, (meth) acrylate n-butyl, (meth) acrylate i-butyl, ( (Meth) acrylic acid esters such as t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate; (meth) acrylamide, N-methyl ( (Meth) acrylamide, N-ethyl (meth) acrylamide, N,
- Vinyl ether vinyl cyanide such as (meth) acrylonitrile
- vinyl halide such as vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride
- Allyl compounds such as allyl acetate and allyl chloride; maleic acid or its salts, esters or acid anhydrides; itaconic acid or its salts, esters or acid anhydrides
- vinylsilyl compounds such as vinyltrimethoxysilane; unsaturated sulfonic acids be able to.
- Said polyvinyl ester can have a structural unit derived from 1 type, or 2 or more types of an above described other monomer.
- the proportion of structural units derived from the other monomers described above in the polyvinyl ester is preferably 25 mol% or less based on the number of moles of all structural units constituting the polyvinyl ester, and is 15 mol%. More preferably, it is more preferably 5 mol% or less. When the ratio exceeds 25 mol%, the affinity between the hydraulic transfer base film and the printing layer tends to be reduced.
- the above PVA may be modified with one or two or more types of graft copolymerizable monomers as long as the effects of the present invention are not impaired.
- the graft copolymerizable monomer include unsaturated carboxylic acids or derivatives thereof; unsaturated sulfonic acids or derivatives thereof; ⁇ -olefins having 2 to 30 carbon atoms, and the like.
- the proportion of structural units derived from the graft copolymerizable monomer in PVA is preferably 5 mol% or less based on the number of moles of all structural units constituting PVA.
- the above PVA may have a part of its hydroxyl group cross-linked or not cross-linked. Moreover, said PVA may react with aldehyde compounds, such as acetaldehyde and a butyraldehyde, etc. to form an acetal structure, and the said PVA does not react with these compounds and does not form an acetal structure. May be.
- aldehyde compounds such as acetaldehyde and a butyraldehyde, etc.
- the polymerization degree of the above PVA is preferably in the range of 500 to 3000, more preferably in the range of 700 to 2800, and still more preferably in the range of 1000 to 2500.
- the degree of polymerization of PVA is less than 500, the mechanical strength of the obtained base film for hydraulic transfer may be insufficient.
- the degree of polymerization of PVA exceeds 3000, the production efficiency in producing a hydraulic transfer base film may be reduced.
- the water solubility of the hydraulic transfer base film, and thus the hydraulic transfer film may be reduced. May decrease, making it difficult to perform hydraulic transfer at an economical process speed.
- the polymerization degree of PVA as used in this specification means the average degree of polymerization measured according to description of JIS K6726-1994.
- the degree of saponification of the above PVA is preferably in the range of 80 to 99 mol%, more preferably in the range of 83 to 96 mol%, and still more preferably in the range of 85 to 90 mol%. .
- the degree of saponification of PVA is less than 80 mol%, the water-solubility of the base film for hydraulic transfer, and hence the film for hydraulic transfer, decreases, making it difficult to perform hydraulic transfer at an economical process speed. There is.
- the degree of saponification of PVA exceeds 99 mol%, the water-solubility of the base film for hydraulic transfer and the film for hydraulic transfer is lowered, making it difficult to perform hydraulic transfer at an economical process speed. There is a case.
- the degree of saponification of PVA refers to the total number of moles of structural units (typically vinyl ester units) that can be converted into vinyl alcohol units by saponification and the vinyl alcohol units of PVA.
- the degree of saponification can be measured according to the description of JIS K6726-1994.
- the plasticizer is preferably a polyhydric alcohol, and specific examples thereof include ethylene glycol, glycerin, propylene glycol, diethylene glycol, diglycerin, triethylene glycol, tetraethylene glycol, and trimethylolpropane.
- the plasticizer content in the PVA film is preferably 20 parts by mass or less and more preferably 15 parts by mass or less with respect to 100 parts by mass of PVA. When content of a plasticizer exceeds 20 mass parts, blocking of a PVA film may arise.
- the PVA film contains a water-soluble polymer other than starch and / or PVA.
- starch examples include natural starches such as corn starch, potato starch, sweet potato starch, wheat starch, rice starch, tapioca starch, and sago starch; processed starches that have been subjected to etherification, esterification, oxidation, etc. In particular, modified starches are preferred.
- the starch content in the PVA film is preferably 15 parts by mass or less, and more preferably 10 parts by mass or less with respect to 100 parts by mass of PVA. When the starch content exceeds 15 parts by mass, the impact resistance of the base film for hydraulic transfer and the film for hydraulic transfer is lowered and brittle, and the process passability may be reduced.
- water-soluble polymers other than PVA include, for example, dextrin, gelatin, glue, casein, shellac, gum arabic, polyacrylic acid amide, sodium polyacrylate, polyvinyl methyl ether, a copolymer of methyl vinyl ether and maleic anhydride, Examples thereof include a copolymer of vinyl acetate and itaconic acid, polyvinyl pyrrolidone, cellulose, acetyl cellulose, acetyl butyl cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, sodium alginate and the like.
- the content of the water-soluble polymer other than PVA in the PVA film is preferably 15 parts by mass or less and more preferably 10 parts by mass or less with respect to 100 parts by mass of PVA.
- the solubility and dispersibility of the hydraulic transfer film during hydraulic transfer may be lowered.
- the PVA film contains an additive such as a boron compound or a surfactant.
- the boron compound boric acid and borax are preferable.
- the content of the boron compound in the PVA film is preferably 5 parts by mass or less and more preferably 1 part by mass or less with respect to 100 parts by mass of PVA. If the boron-based compound content exceeds 5 parts by mass, the water-solubility of the hydraulic transfer base film and the hydraulic transfer film may decrease, making it difficult to perform hydraulic transfer at an economical process speed. is there.
- the surfactant is not particularly limited, and known anionic surfactants, cationic surfactants, nonionic surfactants, and the like can be used.
- the content of the surfactant in the PVA film is preferably 5 parts by mass or less and more preferably 1 part by mass or less with respect to 100 parts by mass of PVA. When the content of the surfactant exceeds 5 parts by mass, the base film for hydraulic transfer is likely to be in close contact and the handleability may be reduced.
- the PVA film can contain other components such as a heat stabilizer, an ultraviolet absorber, an antioxidant, a colorant, and a filler.
- the content of these other components is usually 10 parts by mass or less, more preferably 5 parts by mass or less with respect to 100 parts by mass of PVA, although it depends on the type. If the content of other components exceeds 10 parts by mass, the impact resistance of the hydraulic transfer base film may deteriorate.
- the moisture content of the hydraulic transfer base film of the present invention is preferably in the range of 2 to 6% by mass, more preferably in the range of 3 to 5% by mass.
- the moisture content is less than 2% by mass, the moisture content of the resulting hydraulic transfer film tends to be low, and the degree of curling tends to increase during the hydraulic transfer.
- the moisture content exceeds 6% by mass, there is a tendency that problems such as a decrease in printing accuracy tend to occur.
- the thickness of the hydraulic transfer base film of the present invention may be appropriately selected in consideration of the balance between water solubility and process passability, but is usually in the range of 10 to 100 ⁇ m, preferably in the range of 20 to 80 ⁇ m. More preferably, it is within the range of 30 to 50 ⁇ m. If the thickness is less than 10 ⁇ m, the strength of the hydraulic transfer base film may be insufficient, resulting in a decrease in process passability. On the other hand, when the thickness exceeds 100 ⁇ m, the water-solubility of the hydraulic transfer base film and the hydraulic transfer film is lowered, and it may be difficult to perform the hydraulic transfer at an economical process speed.
- the surface of the hydraulic transfer base film is improved. It is preferable that mat processing is performed.
- the mat treatment method include an on-line mat treatment method in which the surface of a mat on a roll or belt is transferred to a film during film formation, and a method in which an emboss treatment is performed after the formed film is once wound on a roll.
- the surface roughness of the mat-treated surface is preferably 0.5 ⁇ m or more in terms of Ra, and more preferably 1 ⁇ m or more.
- As an upper limit of Ra 10 micrometers is mentioned, for example.
- An example of the upper limit of Rmax is 20 ⁇ m.
- the base film for hydraulic transfer of the present invention it is possible to form a film for hydraulic transfer that can sufficiently prevent curling when it floats on the liquid surface.
- the degree of curling of the hydraulic transfer film can be modeled by evaluating the degree of curling of the hydraulic transfer base film itself.
- the curled area ratio is used as a method for evaluating the degree of curling of the base film for hydraulic transfer.
- the curled area ratio is the area of the portion of the base film for hydraulic transfer that has not floated on the surface of the water that does not come into contact with the water surface due to curling of the end of the base film for hydraulic transfer after the surface of the surface has been floated. It is a ratio and is measured by the method described later.
- the curl area ratio means that the smaller the value, the more curling is prevented and the transfer efficiency of the hydraulic transfer film is excellent. Specifically, it is preferably 7% or less, more preferably 6% or less, 5% or less is more preferable.
- the method for producing the hydraulic transfer base film of the present invention is not particularly limited.
- a film having no cut is formed in advance, and a linear cut is formed on the film;
- a method in which a film having no cut is formed in advance and a linear cut is formed on the film is preferable.
- disconnection to the film formed into a film For example, when manufacturing the base film for a long hydraulic pressure transfer, a perforation cutter etc.
- the film forming method in either case where a film without a cut is formed in advance or when a linear cut is formed simultaneously when forming a film, and the film is formed.
- the film can be formed by appropriately adopting a film forming method such as a casting method, an extrusion method, a melting method, or an inflation method according to the type of the material to be processed.
- the film after film formation may be unstretched, or may be subjected to uniaxial stretching or biaxial stretching for the purpose of improving mechanical properties in accordance with transfer conditions during liquid level transfer.
- the hydraulic transfer film can be obtained by printing on the surface of the hydraulic transfer base film of the present invention.
- a printing layer can be formed by employ
- the printing may be performed directly on the hydraulic transfer base film with printing ink, or once the printing layer is formed on another film, the printing is performed by transferring it to the hydraulic transfer base film. It can also be done.
- a conventionally well-known thing can be used as printing ink used for printing.
- the above-described hydraulic transfer film is floated on the surface of a liquid such as water with the printed surface facing upward, and hydraulic transfer is performed by pressing a transfer target such as various molded bodies from above. it can.
- a more detailed hydraulic transfer method for example, the first step of activating the printing layer by floating the hydraulic transfer film on the liquid surface with the printed side up and spraying an ink activator, etc.
- a hydraulic transfer method comprising each step can be mentioned.
- transfer material for example, woody substrates such as wood, plywood, and particle board; various plastics; gypsum board; fiber cement boards such as pulp cement boards, slate boards, asbestos cement boards; calcium silicates Plates; Magnesium silicate plates; Glass fiber reinforced cement; Concrete; Plates of metals such as iron, stainless steel, copper, and aluminum; and composites thereof.
- the transferred body may have a flat surface, a rough surface, or an uneven shape, but may be a transferred object having an uneven solid surface or curved surface. It is preferable that the advantage of hydraulic transfer can be utilized more effectively.
- Example 1 After cutting out a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. 3A, a length of 10 mm at a position 5 mm from the edge of one side. Two straight cuts (those penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) were made. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- Example 2 After cutting out a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. 3B, a length of 20 mm at a position 5 mm from the edge of one side. A straight cut (one penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) was inserted. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- Example 3 After cutting a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. A straight cut (one penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) was inserted. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- Example 4 After cutting out a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. 3D, a length of 10 mm at a position 5 mm from the edge of one side. Two straight cuts (those penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) were made. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- Example 5 After cutting out a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. A straight cut (one penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) was inserted. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- Example 6 After cutting out a 200 mm ⁇ 200 mm square film from the PVA film obtained in Production Example 1, using a cutter knife, as shown in FIG. 3 (f), a length of 5 mm at a position 5 mm from the edge of one side. Four straight cuts (those penetrating in the thickness direction of the film; the line width of the opening portion is 70 ⁇ m or less) were made. The remaining three sides were similarly cut to form a hydraulic transfer base film (moisture content of 4.0% by mass) for measuring the curled area ratio, and the curled area ratio was measured according to the above method. . The results are shown in Table 1.
- the curl area ratio is small, and curling when floating on the liquid surface can be sufficiently prevented to form a hydraulic transfer film with excellent transfer efficiency. I can see that On the other hand, the hydraulic transfer base film of Comparative Example 1 had a large curl area ratio.
- the hydraulic transfer base film of the present invention can sufficiently prevent curling when it floats on the liquid surface, and can form a hydraulic transfer film with excellent transfer efficiency. It can be suitably used for hydraulic transfer when a printing layer is formed on the surface of the transferred material.
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Abstract
Description
[1]端部に線状の切れ込みを有する液圧転写用ベースフィルム、
[2]液圧転写用ベースフィルムの端の長さ100mm当たり7mm以上の割合で線状の切れ込みを有する、上記[1]の液圧転写用ベースフィルム、
[3]液圧転写用ベースフィルムの端からの距離が1~10mmの範囲内に線状の切れ込みを有する、上記[1]または[2]の液圧転写用ベースフィルム、
[4]ポリビニルアルコールフィルムである、上記[1]~[3]のいずれか1つの液圧転写用ベースフィルム、
[5]上記[1]~[4]のいずれか1つの液圧転写用ベースフィルムの表面に印刷を施してなる液圧転写用フィルム、
[6]上記[5]の液圧転写用フィルムを印刷が施された面を上にして液面に浮かべる工程と浮かべた液圧転写用フィルムの上方から被転写体を押し付ける工程とを有する液圧転写方法、
に関する。
本発明の液圧転写用ベースフィルムは端部(液圧転写用ベースフィルムの端近傍の部分)に線状の切れ込みを有する。端部に線状の切れ込みを有することにより、それから形成される液圧転写用フィルムを液面に浮かべたときのカールを十分に防止することができる。本発明を何ら限定するものではないが、この理由としては、液圧転写用フィルムの端からカールが発生したとしても当該切れ込みによりカールの進行が止まるためと考えられる。また、線状の切れ込みは、特許文献3に記載されているような小孔の場合と異なり、その形成が比較的容易で液圧転写用ベースフィルムを生産性よく製造することができ、屑も発生しにくく、しかも線状の切れ込みが形成された近辺も液圧転写に寄与できて液圧転写用フィルムの有効面積の縮小を低減できる、といった利点も有する。
カールフィッシャー水分計を用いて測定した。
縦420mm×横320mm×高さ160mmの容器に10リットルの水を入れ、30℃に調整した後、以下の実施例または比較例で作製した液圧転写用ベースフィルム(サイズ:200mm×200mm)を、製膜時のステンレス製ベルトに接する面と反対側となる面が水と接するようにして上記容器中の水面に浮かべた。この操作により、通常は液圧転写用ベースフィルムの端部が水面に対して上向きにカールすることになる。浮かべ始めてから25秒後に水面と接触している部分の面積(Amm2)を測定して、次式によりカール面積率(%)を算出した。なお、上記の面積(Amm2)は一連の操作をカメラ撮影して得られた画像データをコンピューターで画像処理することによって測定した。
カール面積率(%)=〔1-A/(200×200)〕×100
カール面積率が7%以下のものを「○」(良好)と判定し、7%より大きいものを「×」(不良)と判定した。
液圧転写用ベースフィルムの製造
けん化度88モル%、重合度2400のPVA100質量部、グリセリン3質量部、コーンスターチ(平均粒度20μm)5質量部、硼砂0.7質量部、およびポリオキシエチレンソルビタンモノラウレート1質量部を含みPVAの濃度が18質量%の水溶液を、温度95℃のステンレス製ベルト上に流延し、2分間乾燥した。乾燥後、ベルトに接する面と反対側となる面を80℃の熱処理ロールで8秒間熱処理し、厚み40μmのPVAフィルムを得た。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(a)のように、1辺の端から5mmの位置に長さ10mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を2つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(b)のように、1辺の端から5mmの位置に長さ20mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を1つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(c)のように、1辺の端から5mmの位置に長さ40mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を1つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(d)のように、1辺の端から5mmの位置に長さ10mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を2つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(e)のように、1辺の端から10mmの位置に長さ20mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を1つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルムを切り出した後、カッターナイフを用いて、図3の(f)のように、1辺の端から5mmの位置に長さ5mmの直線状の切れ込み(フィルムの厚み方向に貫通するもの;開口部分の線幅は70μm以下)を4つ入れた。残りの3辺の端部にも同様に切れ込みを入れてカール面積率測定用の液圧転写用ベースフィルム(水分率4.0質量%)とし、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
製造例1で得られたPVAフィルムから200mm×200mmの正方形のフィルム(水分率4.0質量%)を切り出した後、それをそのままカール面積率測定用の液圧転写用ベースフィルムとして用いて、上記の方法に従って、そのカール面積率を測定した。結果を表1に示した。
Claims (6)
- 端部に線状の切れ込みを有する液圧転写用ベースフィルム。
- 液圧転写用ベースフィルムの端の長さ100mm当たり7mm以上の割合で線状の切れ込みを有する、請求項1に記載の液圧転写用ベースフィルム。
- 液圧転写用ベースフィルムの端からの距離が1~10mmの範囲内に線状の切れ込みを有する、請求項1または2に記載の液圧転写用ベースフィルム。
- ポリビニルアルコールフィルムである、請求項1~3のいずれか1項に記載の液圧転写用ベースフィルム。
- 請求項1~4のいずれか1項に記載の液圧転写用ベースフィルムの表面に印刷を施してなる液圧転写用フィルム。
- 請求項5に記載の液圧転写用フィルムを印刷が施された面を上にして液面に浮かべる工程と浮かべた液圧転写用フィルムの上方から被転写体を押し付ける工程とを有する液圧転写方法。
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