JPWO2017170331A1 - Biaxially stretched polypropylene resin film and package - Google Patents

Abstract

An object of the present invention is to provide a biaxially oriented polypropylene-based resin film and a package that are excellent in printability with water-based ink. A polyoxyethylene alkenyldiethanolamine compound (A) comprising a polypropylene resin as a main component and biaxially stretched, wherein at least one film surface is added with 2 mol or more of ethylene oxide to 1 mol of amine. A biaxially oriented polypropylene resin characterized by the absence of the polyoxyethylene alkylamine diester compound (B) in which 2 mol or more of ethylene oxide is added to 1 mol of amine, and 2 μg / m 2 or more and 30 μg / m 2 or less. It is a film.

Description

  The present invention relates to a biaxially stretched polypropylene resin film characterized by excellent printability such as transferability and adhesion with aqueous ink.

  2. Description of the Related Art Conventionally, polypropylene resin films are widely used as packaging materials for various articles such as foods and textile products because they are very excellent in transparency and mechanical properties. However, it has been pointed out that the problem with polypropylene resin films is that the surface energy is small because the polypropylene resin is nonpolar, and therefore the adhesiveness with printing ink is not sufficient in processing such as printing and laminating. .

  Due to environmental problems in recent years, printing on general films is proceeding with water-based ink from conventional printing using organic solvent-based inks to printing using water-based inks. Also for printing on polypropylene resin films, a method using an amine compound as an antistatic agent has been proposed as a method for improving water-based ink adhesion (see, for example, Patent Document 1 and Patent Document 2).

However, as compared with printing using an organic solvent-based ink, the printability such as transferability and adhesion is still inferior, and the need for improving water-based ink printability is still high.

JP 2004-10882 A Japanese Patent Laid-Open No. 2004-224989

  To provide a biaxially stretched polypropylene resin film that is excellent in printability such as transferability and adhesion with water-based ink.

That is, the present invention has the following configuration.
1. A polyoxyethylene alkenyl diethanolamine compound (A) in which 2 mol or more of ethylene oxide is added to 1 mol of the amine represented by the general formula (1) on the surface of at least one film of polypropylene resin is 2 μg / m ² or more 40 [mu] g / m ² there below, and characterized in that the general formula (2) polyoxyethylene alkyl amine diester compound relative to the amine to one mole of the indicated obtained by adding ethylene oxide 2 moles or more (B) is not present Biaxially stretched polypropylene resin film.
General formula (1)

R1 in the general formula (1) is an alkenyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.
General formula (2)

R2 and R3 in the general formula (2) are alkyl groups having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.
2. 1. The polyoxyethylene alkyldiethanolamine compound (C) obtained by adding 2 mol or more of ethylene oxide to 1 mol of the amine represented by the general formula (3) is present on the film surface in the range of 5 μg / m ^{2 to} 40 μg / m ² The biaxially stretched polypropylene resin film described in the item.
General formula (3)

R4 in the general formula (3) is an alkyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.
3. 3. The biaxially stretched polypropylene resin film as described in 2 above, wherein the glycerin monofatty acid ester compound (D) represented by the general formula (4) is present at 0.1 μg / m ² or more and 20 μg / m ² or less on the film surface.
General formula (4)

R5 in the general formula (4) is an alkyl group having 12 to 25 carbon atoms.
4). The package using the biaxially-stretched polypropylene resin film of said 1-3.

  The biaxially stretched polypropylene-based resin film of the present invention can improve printability such as transferability and adhesion by aqueous ink by optimizing the type and amount of additives present on the surface. .

An example of a magnified view of the magnification of 125 times with a microscope on the surface of a water-based ink print having uniform dot size and no ink repellency. An example of a magnified view of the magnification of 125 times with a microscope on the surface of a water-based ink printing surface with uniform dot size and ink repellency. An example of a magnified view of the magnification of 125 times with a microscope on the surface of a water-based ink printed with uneven dot size and ink repellency. The enlarged view of the ink repellency part of FIG.

Hereinafter, embodiments of the biaxially stretched polypropylene resin film of the present invention will be described.
The biaxially stretched polypropylene-based resin film of the present invention is mainly composed of a polypropylene-based resin, and there is no particular problem whether it is a single layer configuration or a multilayer configuration in which skin layers and the like are laminated. By selecting a low melting point resin as the skin layer, it is possible to impart heat sealability. In addition, the melt flow rate (MFR) of the polypropylene resin used is 0.1 to 100 g / 10 min, preferably 0.5 to 20 g / 10 min, and more preferably 1.0 to 10 g / 10 min. it can.

  Examples of the polypropylene resin suitable for forming the biaxially stretched polypropylene resin film in the present invention include isotactic polypropylene, propylene / ethylene copolymer, propylene / butene-1 copolymer, propylene / ethylene / copolymer. 1 type (s) or 2 or more types, such as a butene-1 copolymer and a propylene * pentene copolymer, can be used. In addition, other polyolefin resins such as ethylene / butene-1 copolymer, ethylene / propylene / butene-1 copolymer, ethylene / acrylic acid copolymer, ethylene An ionomer obtained by crosslinking an acrylic acid copolymer with a metal ion, polybutene-1, butene / ethylene copolymer, or the like can be mixed and used in part.

  The film thickness of the biaxially stretched polypropylene resin film in the present invention varies depending on its use and usage, but the polypropylene resin film as a packaging film is generally about 10 to 100 μm, and has mechanical strength and transparency. More preferably, the thickness is about 15 to 50 μm.

The polyoxyethylene alkenyl diethanolamine compound (A) in which 2 mol or more of ethylene oxide is added to 1 mol of the amine represented by the general formula (1) on at least one film surface of the biaxially stretched polypropylene resin film in the present invention. there must be present 2 [mu] g / ^{m 2} or more 30 [mu] g / ^{m 2} or less.
General formula (1)

R1 in the general formula (1) is an alkenyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.

The compound (A) is a so-called surfactant composed of a polar component and a nonpolar component, and since the effect of the polar component is strong as the surfactant, the transfer property of the water-based ink is good and the melting point is relatively low. Therefore, it has a feature that it is difficult to solidify when bleeding out on the film surface. For this reason, the surfactant on the film surface is hardly crystallized or solidified even at low temperatures such as in winter, and has the effect of maintaining aqueous printability, and particularly has the effect of improving the transferability of aqueous ink.
As the mechanism, for the transfer of ink to the surface of the polypropylene resin film, the solubility of the ink component in the hydrophilic group component on the surface is important, and the greater the fluidity of the hydrophilic component, the better the ink solubility. It is.
The transferability of water-based ink here refers to printing unevenness and dot size and shape during gravure halftone printing. Specifically, printing unevenness is evaluated by visual observation, and dot size and shape are measured with a microscope or the like. Observe and evaluate.

Surface presence of the compound (A) is required to be 2 [mu] g / ^{m 2} or more 30 [mu] g / ^{m 2} or less. If it is less than 2 μg / m ² , the ink transfer property is insufficient, and if it is more than 30 μg / m ² , ink stickiness or ink bleeding occurs during printing. Preferably, it is 5 μg / m ² or more and 25 μg / m ² or less, more preferably 5 μg / m ² or more and 15 μg / m ² or less.
The amount of compound (A) added is preferably 0.15 to 0.25 parts by weight.

  The polyoxyethylene alkenyl diethanolamine of a C12-25 fatty acid of the compound (A) can be synthesized by a known method. Although the molar ratio of polyoxyethylene alkenyl diethanolamine can be selected as appropriate, the number of moles of oxyethylene is preferably 2. Examples of the alkenyl having 12 to 25 carbon atoms include a myristolyl group, a palmitoleyl group, and an oleyl group, and an oleyl group is particularly preferable.

Further, it is necessary that the polyoxyethylene alkylamine diester compound (B) obtained by adding 2 mol or more of ethylene oxide to 1 mol of the amine represented by the general formula (2) does not exist on the film surface.
General formula (2)

R2 and R3 in the general formula (2) are alkyl groups having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.

Examples of the alkyl group of the polyoxyethylene alkylamine diester compound of a fatty acid having 12 to 25 carbon atoms of the compound (B) include a myristyl group, a palmityl group, a stearyl group, and an eicosyl group.
The compound (B) is also a so-called surfactant composed of a polar component and a nonpolar component. However, the ratio of the nonpolar component is structurally small and the effect of the polar component is weak. Have the effect of inhibiting.
In order not to exist on the surface, it is preferable not to add the compound (B). Moreover, when manufacturing industrially, it is preferable that a compound (B) does not exist in a recycled raw material.

Further, a polyoxyethylene alkyldiethanolamine compound (C) obtained by adding 2 moles or more of ethylene oxide to 1 mole of the amine represented by the general formula (3) on the film surface is 5 μg / m ² or more and 40 μg / m ^{2 on the} film surface. ^It is preferable that ² or less exist.
General formula (3)

R4 in the general formula (3) is an alkyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.

The polyoxyethylene alkyl diethanolamine of the C12-25 fatty acid of the compound (C) can be synthesized by a known method. Although the molar ratio of polyoxyethylene alkenyl diethanolamine can be selected as appropriate, the number of moles of oxyethylene is preferably 2. Examples of the alkyl group having 12 to 25 carbon atoms include a myristyl group, a palmityl group, a stearyl group, and an eicosyl group, and a stearyl group is particularly preferable.
The compound (C) is also a so-called surfactant composed of a polar component and a nonpolar component, and since the effect of the polar component is strong as the surfactant, the transfer property of the water-based ink is good. However, since the melting point is relatively high, it may solidify when bleeding out on the film surface, and the effect of improving the transfer property of the water-based ink may be difficult to appear at low temperatures.
In order to be present at 5 μg / m ² or more and 40 μg / m ² or less on the film surface, a method of directly adding the compound (C) is preferred. In addition, the heat during the film-forming process can be obtained by adding the polyoxyethylene alkylamine monoester compound (E) obtained by adding 2 mol or more of ethylene oxide to 1 mol of the amine represented by the general formula (5). Alternatively, the compound (C) can be produced by decomposition over time.
Specifically, it is known that polyoxyethylene (2) stearyl diethanolamine monostearate decomposes into a mixture of polyoxyethylene (2) palmitylamine and polyoxyethylene (2) stearylamine.
The amount added is preferably 0.05 to 0.2 parts by weight in the compound (C), and preferably 0.2 to 0.3 parts by weight in the compound (E). Since it changes not only with the addition amount but also with corona treatment and with time, evaluation by actual measurement is necessary.
General formula (5)

R6 and R7 in the general formula (5) are alkyl groups having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.

When the surface abundance of the compound (C) is less than 5 μg / m ² , the ink transfer property is insufficient, and when it is more than 40 μg / m ² , stickiness of the film and ink bleeding occur during printing.

Further, the glycerin monofatty acid ester compound (D) represented by the general formula (4) needs to be present on the film surface in an amount of 0.1 μg / m ² or more and 20 μg / m ² or less on the film surface.
General formula (4)

R5 in the general formula (4) is an alkyl group having 12 to 25 carbon atoms.

The ester of the glycerin monofatty acid ester compound (D) and the long chain fatty acid having 12 to 25 carbon atoms can be synthesized by a known method comprising glycerin and the long chain fatty acid. Examples of such monoglycerides include glycerin monooleate, glycerin monocaprate, glycerin monolaurate, glycerin monostearate, glycerin monopalmitate, and glycerin monobehenate, and glycerin monostearate is particularly preferable.
The glycerin monofatty acid ester compound compound (D) is also a so-called surfactant composed of polar and nonpolar components. However, since it is easily decomposed by heat, it is easy to bleed out on the film surface and bleed out other additives. There is an effect to promote.

When the surface abundance of the glycerin monofatty acid ester compound (D) is less than 0.1 μg / m ² , the ink transfer property is insufficient, and when it is more than 20 μg / m ^2, ink bleeding occurs.

Moreover, the polyoxyethylene alkylamine monoester compound (E) which added 2 mol or more of ethylene oxide with respect to 1 mol of amine shown by General formula (5) may exist on the film surface.
General formula (5)

R6 and R7 in the general formula (5) are alkyl groups having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.

Examples of the alkyl group having 12 to 25 carbon atoms of the polyoxyethylene alkylamine monoester compound compound (E) include a myristyl group, a palmityl group, a stearyl group, and an eicosyl group.
The polyoxyethylene alkylamine monoester compound (E) is also a so-called surfactant comprising a polar component and a nonpolar component. Although 0.1 μg / m ² or more and 300 μg / m ² or less may be present on the film surface, the compound (C) as a decomposition product is preferably present in the film surface by 5 μg / m ² or more and 40 μg / m ² or less.
In addition, various additives for improving quality such as slipperiness and antistatic properties, for example, lubricants such as wax and metal soap for improving productivity, plasticity, as long as the effects of the present invention are not impaired. It is also possible to add known heat stabilizers, antioxidants, antistatic agents, ultraviolet absorbers, and the like that are usually added to additives, processing aids, and polypropylene resin films. It is also possible to blend inorganic or organic fine particles to ensure the blocking resistance and slipperiness of the film.

  Examples of inorganic fine particles include silicon dioxide, calcium carbonate, titanium dioxide, talc, kaolin, mica, zeolite, etc., and these shapes are not limited to spherical, elliptical, conical, indeterminate, and types, The desired particle size can be used and blended depending on the purpose and usage of the film. Moreover, as organic fine particles, cross-linked particles such as acrylic, methyl acrylate, and styrene-butadiene can be used, and various shapes and sizes can be used in the same manner as inorganic fine particles. Is possible. In addition, various surface treatments can be applied to the surface of these inorganic or organic fine particles, and these can be used alone or in combination of two or more.

  The biaxially stretched polypropylene resin film of the present invention can be subjected to a surface treatment in order to improve printability, laminating properties and the like. Examples of the surface treatment method include corona discharge treatment, plasma treatment, flame treatment, and acid treatment.

  In the present invention, the water-based ink suitable for printing with the water-based ink can be used without particular limitation as long as the amount of the organic solvent in the ink at the time of use is 30% by weight or less. The dispersion medium used in the water-based ink may be any of water-soluble type, colloidal dispersion type, and emulsion type. As the resin, shellac, rosin modified resin, acrylic resin, styrene-maleic acid resin, styrene- An acrylic resin, a polyester resin, a polyurethane resin or the like can be used alone or as a mixture. As the pigment, organic and inorganic pigments can be used without any limitation, and various auxiliary agents such as a dispersant can be optionally added. In addition to water, ethanol, isopropyl alcohol, n-propyl alcohol, or the like can be used as the solvent for the ink.

  The method of gravure printing with water-based ink on the water-based ink adhesion surface layer of the biaxially stretched polypropylene resin film of the present invention is not particularly limited, and a known method can be used, but the film of the present invention is a multicolor gravure printing. This is particularly effective when using.

The biaxially stretched polypropylene resin film of the present invention can be produced by the following method, but is not limited thereto.
For example, after melt lamination by T-die method or inflation method using an extruder suitable for the number of layers, it is cooled by a cooling roll method, water cooling method or air cooling method to form a laminated film, sequentially biaxial stretching method, simultaneous biaxial Examples of the stretching method include a stretching method and a tube stretching method.
Here, if the conditions at the time of manufacturing by a sequential biaxial stretching method are illustrated, the resin melt-extruded from the T-shaped die is cooled and solidified by a casting machine to produce a raw sheet.
The temperature at the time of melt lamination is preferably set in the range of 240 ° C. to 300 ° C. with reference to the melting point of the raw material resin used for each layer. The casting roll temperature is preferably set between 15 ° C. and 40 ° C. for the purpose of suppressing crystallization of the resin and improving transparency.
Next, after heating the raw sheet to a temperature suitable for stretching, the sheet is stretched in the flow direction of the sheet using the difference in speed between the stretching rolls. Considering this, it is preferable to set between 3 and 6 times. The stretching temperature is also preferably set between 100 ° C. and 150 ° C. in view of stable production without unevenness of stretching.
Next, both ears of the longitudinally stretched sheet are gripped by a tenter clip, and stretched while being sequentially expanded in a direction perpendicular to the flow of the sheet while being heated to a temperature suitable for stretching with hot air. In this case, the transverse draw ratio is preferably set between 7 times and 10 times in consideration of thickness variation and productivity. The stretching temperature is also preferably set between 130 ° C. and 180 ° C. in view of stable production without unevenness of stretching.

  Finally, it is preferable to perform a surface treatment. Examples of the surface treatment method include corona discharge treatment, plasma treatment, flame treatment, and acid treatment. Corona discharge treatment, plasma treatment, and flame treatment are preferable because they can be continuously processed and can be easily performed before the winding process in the film production process.

  Hereinafter, specific examples of the present invention will be further described with reference to examples. However, the present invention is not limited to the following examples without departing from the gist thereof. In addition, the characteristic in this specification evaluated by the following method.

(1) Measurement of additive abundance on film surface Sample A4 size was cut and wiped with Kimwipe that had been cut and washed in advance, using one sheet as an evaluation surface. The test was carried out twice in the vertical and horizontal directions at as constant pressure, speed and frequency as possible. These wipes were performed with a single Kimwipe. The wiped Kim towel was extracted and washed with warm chloroform at 80 ° C., and the resulting extract and washing solution were combined, concentrated, filtered, and dried under a nitrogen purge. This was dissolved in chloroform, appropriately diluted with chloroform, isopropanol, and methanol, and subjected to LC / MS analysis.
[LC conditions]
Device: Waters ACQUITY UPLC
Column: Waters BEH-C18 2.1 x 150 mm
Mobile phase: A 0.1% formic acid, B isopropanol
0 min (30% B) -20 (98) -25 (98)
Flow rate: 0.2 ml / min
Column temperature: 50 ° C
Injection volume: 5 μl

[MS conditions]
Device: BRUKER DALTONICS MICOTOF
Ionization method: Since ESI positive alkyldiethanolamine and its esters are a mixture of a large number and their respective preparations were not available, a kind of antistatic agent, stearylamine monostearate (Matsumoto Yushi Seiyaku Co., Ltd., TB-) 12) was used as a sample, and the concentration was calculated on the assumption that the ionization efficiency of alkyldiethanolamine and its esters was the same. For components that do not fall within the range of the calibration curve, one inspection amount was performed at the lowest or highest concentration point. Similarly, glycerin monoester was quantitatively calculated for mixed components using glycerin monostearate (Matsumoto Yushi Seiyaku Co., Ltd., TB-123).
For the analysis, an extracted ion chromatogram of a component detected in the sample was used. For a component in which a plurality of molecular ions are detected in a significant amount (such as proton addition and sodium ion addition), the calculation was performed using the sum of the respective peak areas.

(2) Evaluation of water-based ink printability (printing)
On the film surface, gravure printing with water-based ink was carried out at a speed of 50 m / min using a gravure printing machine (Fuji Machinery Co., Ltd.). The process chart version was used for the printed design. The ink and diluent used are shown below.
Water-based ink: Toyo Ink Co., Ltd. Trade name JW291 Akwa Ecole R39 (registered trademark)
Diluting solvent: Toyo Ink Co., Ltd. Trade name AQ602F
(Visual observation)
The printed part was visually observed, and the degree of printing unevenness and gradation reproducibility were evaluated. Three levels of evaluation criteria are shown.
○: No printing unevenness △: Partial printing unevenness ×: Full printing unevenness

(Microscope observation)
Using a DIGITAL MICROSCOPE VHX-200 manufactured by KEYENCE, the shape of the printed dots was observed at a magnification of 125 times, and the dot size and the degree of ink repellency were evaluated. Three levels of evaluation criteria are shown. The dot shape by each evaluation was illustrated in FIGS. As for ink repelling, FIG. 4 illustrates an enlarged view of the ink repelling portion of FIG.
○: Uniform dot size and no ink repellency (Fig. 1)
Δ: The dot size is uniform and there is ink repellency (Fig. 2)
×: The dot size is uneven and there is ink repellency (Fig. 3)

Example 1
Using a melt extruder, oleyl as a compound (A) with respect to 100 parts by weight of FS2011DG3 (density 0.90 g / cm ³ , MFR 2.5 g / 10 min, melting point 157 ° C.) manufactured by Sumitomo Chemical Co., Ltd. 0.20 part by weight of diethanolamine (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA35) and 0.22 part by weight of stearyl diethanolamine monostearate (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA321) as compound (E) Parts, glycerol monostearate (manufactured by Toho Chemical Industry Co., Ltd .: Anstex MG100) as a compound (D) is mixed with 0.05 parts by weight, and then melt-kneaded and granulated using an extruder equipped with a pelletizer to form a polypropylene composition. A product pellet was obtained.

  Next, the obtained pellets are melt-kneaded by a melt extruder, extruded by a T-die method, cooled and solidified by a chill roll at 30 ° C., 4.5 times in the longitudinal direction at 125 ° C., and transverse at 155 ° C. A biaxially stretched polypropylene resin film having a thickness of 20 μm was obtained by stretching 8 times in the direction and further corona treating both surfaces. The obtained film satisfied the requirements of the present invention and had excellent water-based ink printability. Table 1 shows the film composition and physical property results.

(Example 2)
A biaxially stretched polypropylene resin film was obtained in the same manner as in Example 1 except that glycerol monostearate (manufactured by Toho Chemical Industry Co., Ltd .: Anstex MG100) was changed to 0.10 parts by weight as the compound (D). It was. The obtained film satisfied the requirements of the present invention as in Example 1, and had excellent aqueous ink printability. Table 1 shows the film composition and physical property results.

(Example 3)
The film obtained in Example 1 was processed in an oven at 40 ° C. for 1 month to obtain a film sample. The obtained film satisfied the requirements of the present invention as in Example 1, and had excellent aqueous ink printability. Table 1 shows the film composition and physical property results.

Example 4
A biaxially stretched polypropylene resin film was obtained in the same manner as in Example 1 except that oleyl diethanolamine (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA35) was changed to 0.10 parts by weight as the compound (A). The obtained film satisfied the requirements of the present invention as in Example 1, and had excellent aqueous ink printability. Table 1 shows the film composition and physical property results.

(Example 5)
A biaxially stretched polypropylene resin film was obtained in the same manner as in Example 1 except that oleyl diethanolamine (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA35) was changed to 0.05 parts by weight as the compound (A). The obtained film satisfied the requirements of the present invention as in Example 1, and had excellent aqueous ink printability. Table 1 shows the film composition and physical property results.

(Comparative Example 1)
Polyoxyethylene (2) stearylamine (Matsumoto Yushi Seiyaku Co., Ltd., TB-12) was added as compound (C) without adding oleyl diethanolamine (manufactured by Toho Chemical Co., Ltd .: Anstex SA35) as compound (A). 0.20 part by weight, stearyldiethanolamine monostearate (manufactured by Toho Chemical Co., Ltd .: Anstex SA321) as compound (E), 0.68 part by weight, and glycerin monostearate (Toho Chemical) as compound (D) A biaxially stretched polypropylene resin film was obtained in the same manner as in Example 1 except that Kogyo Co., Ltd .: Anstex MG100) was changed to 0.03 parts by weight. The obtained film did not satisfy the requirements of the present invention and was a film having poor aqueous printability. Table 2 shows the film composition and physical property results.

(Comparative Example 2)
0.16 parts by weight of polyoxyethylene (2) stearylamine (Matsumoto Yushi Seiyaku Co., Ltd., TB-12) as compound (C) and stearyl diethanolamine monostearate (Toho Chemical Co., Ltd.) as compound (E) Comparative Example, except that 0.64 parts by weight of manufactured product: Anstex SA321) and glycerol monostearate (produced by Toho Chemical Industry Co., Ltd .: Anstex MG100) as compound (D) were changed to 0.20 parts by weight. A biaxially stretched polypropylene-based resin film was obtained in the same manner as in 1. The film obtained did not satisfy the requirements of the present invention and was poor in aqueous printability. Show.

(Comparative Example 3)
0.20 parts by weight of oleyl diethanolamine (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA35) as the compound (A) and stearylamine distearate (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA300F) as the compound (B) 0.24 parts by weight, 0.24 parts by weight of polyoxyethylene (2) stearylamine (Matsumoto Yushi Seiyaku Co., Ltd., TB-12) as compound (C), and glycerol monostearate (Toho) as compound (D) Chemical Industry Co., Ltd .: Anstex MG100) was changed to 0.10 parts by weight, and Stearyl Diethanolamine Monostearate (Toho Chemical Industry Co., Ltd .: Anstex SA321) as compound (E) was changed to 0.32 parts by weight. The biaxially oriented polypropylene resin film was the same as in Example 1 except that I got Lum. The obtained film did not satisfy the requirements of the present invention and was a film having poor aqueous printability. Table 2 shows the film composition and physical property results.

(Comparative Example 4)
Biaxially stretched polypropylene resin film in the same manner as in Comparative Example 3, except that stearylamine distearate (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA300F) was changed to 0.12 parts by weight as the compound (B). Got. The obtained film did not satisfy the requirements of the present invention and was a film having poor aqueous printability. Table 2 shows the film composition and physical property results.

(Comparative Example 5)
A biaxially stretched polypropylene resin film was obtained in the same manner as in Example 1 except that oleyl diethanolamine (manufactured by Toho Chemical Industry Co., Ltd .: Anstex SA35) was changed to 0.4 parts by weight as the compound (A). The obtained film did not satisfy the requirements of the present invention and was a film having poor aqueous printability. Table 2 shows the film composition and physical property results.

  The biaxially stretched polypropylene resin film of the present invention can provide a film suitable for packaging with improved printability such as transferability and adhesion with aqueous ink.

Claims (4)

A polyoxyethylene alkenyl diethanolamine compound (A) in which 2 mol or more of ethylene oxide is added to 1 mol of the amine represented by the general formula (1) on the surface of at least one film of polypropylene resin is 2 μg / It is characterized in that there is no polyoxyethylene alkylamine diester compound (B) which is present in an amount of not less than m ^{2 and not} more than 30 μg / m ² and in which 2 mol or more of ethylene oxide is added to 1 mol of the amine represented by formula (2). Biaxially stretched polypropylene resin film.
General formula (1)
R1 in the general formula (1) is an alkenyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30.
General formula (2)
R2 and R3 in the general formula (2) are alkyl groups having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30. The polyoxyethylene alkyldiethanolamine compound (C) obtained by adding 2 mol or more of ethylene oxide to 1 mol of the amine represented by the general formula (3) is present on the film surface in an amount of 5 μg / m ² or more and 40 μg / m ² or less. 1. A biaxially stretched polypropylene resin film according to 1.
General formula (3)
R4 in the general formula (3) is an alkyl group having 12 to 25 carbon atoms, X and Y are integers of 1 to 29, and X + Y is an integer of 2 to 30. The biaxially oriented polypropylene resin according to claim 1 or ² , wherein the glycerin monofatty acid ester compound (D) represented by the general formula (4) is present on the film surface in an amount of 0.1 µg / m ² or more and 20 µg / m ² or less. the film.
General formula (4)
R5 in the general formula (4) is an alkyl group having 12 to 25 carbon atoms.   The biaxially stretched polypropylene-based resin film according to claim 1 and a package using the same.