JPH1086290A - Antibacterial synthetic resin oriented film and antibacterial laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the abrasion resistance of a film, blended with antibacterial agent, without spoiling the glossiness and transparency of the same by a method wherein a surface layer, having antibacterial property, is provided at least on one side of the film and the glossiness of the surface layer side is specified while a specified inorganic antibacterial agent is contained in the surface layer. SOLUTION: Antibacterial agent is preferable to be an inorganic compound and, more preferably, the antibacterial agent is constituted of a bearer, having excellent affinity with a synthetic resin such as zeolite, silica, or titanium oxide, which bears silver ion, copper ion or zinc ion, practically. Polypropylene resin, polyethylene resin, polyester resin, polyvinyl chloride resin or polyamide resin is used as the synthetic resin, blended with the antibacterial agent because of the affinity with the antibacterial agent, while microvoid, produced between the antibacterial agent and the synthetic resin, is reduced so as not to loose the transparency and glossiness. On the other hand, the glossiness of an antibacterial synthetic resin oriented film on the surface layer side is specified so as to be 100% or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stretched antibacterial synthetic resin film and an antibacterial printed laminate.
More specifically, the present invention relates to a synthetic resin film containing an inorganic antibacterial agent, and an antibacterial print laminate obtained by laminating the synthetic resin film and a printed body, or the printed synthetic resin film and another substrate. .

[0002]

2. Description of the Related Art It has long been known that heavy metals such as silver, copper and zinc have an antibacterial or bactericidal action. In recent years, various antibacterial agents or antibacterial products utilizing these antibacterial metals have been proposed. As the form of the antibacterial agent, it is known that the antibacterial metal is used as a simple substance such as a powder or a fiber, and that the antibacterial metal is supported on zeolite, silica, or the like by ion exchange.
(JP-A-63-265809, JP-A-3-812
No. 09)

On the other hand, films filled with these antibacterial metals or inorganic compounds containing them have impaired transparency and gloss, or have extremely impaired abrasion resistance on the antibacterial surface. When used alone or when used as a medium for a printed laminate, the original film has poor transparency,
By handling after lamination, it is easy to be scratched due to poor abrasion resistance, transparency that should be originally possessed, printing effect etc. is hardly reflected visually, it is not necessarily preferred, therefore, using an antibacterial agent, Conventionally, there has been no printed laminate having excellent gloss, transparency, and abrasion resistance.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present inventors have considered that, when a synthetic resin film is blended with an antibacterial agent and used alone, or when the film is laminated and used as a printed laminate, Without impairing the aesthetics such as the gloss and transparency of the film or print laminate,
The purpose of obtaining a film or laminate with excellent abrasion resistance was the result of intensive research. As a result, the thickness of the layer containing the antimicrobial agent, the amount of the antimicrobial agent mixed, the average particle size of the antimicrobial agent, and the surface containing the antimicrobial agent The present invention has been completed by setting the dynamic friction coefficient of the layer in an appropriate range. Hereinafter, the configuration of the present invention will be described in detail.

[0005]

Means for Solving the Problems The present invention provides the following (1)-
It has the configuration of (9). (1) At least one surface has an antibacterial surface layer,
A stretched antibacterial synthetic resin film having a glossiness of 100% or more on the surface layer side. (2) The stretched antibacterial synthetic resin film according to (1), wherein the antibacterial agent contained in the surface layer having antibacterial properties is an inorganic compound carrying silver, copper, and zinc. (3) The stretched antibacterial synthetic resin film according to (1) or (2), wherein the carrier of the antibacterial agent contained in the antibacterial surface layer is silica, titanium oxide, or zeolite. (4) The method according to (1) to (3), wherein the synthetic resin forming the surface layer having antibacterial properties is a resin selected from polypropylene resin, polyester resin, polyvinyl chloride resin, polyethylene resin, and polyamide resin. The stretched antibacterial synthetic resin film according to any one of the above. (5) The average particle diameter of the antibacterial agent contained in the surface layer having antibacterial properties is 0.01 to 4 μm, and the content of the antibacterial agent in the surface layer is 0.05 to 2.0 wt%. The stretched antibacterial synthetic resin film according to any one of (1) to (4), wherein the surface layer has a dynamic friction coefficient of 0.05 to 0.80. (6) The thickness of the surface layer having antibacterial properties is 0.1 to 25 μm.
m, the stretched antibacterial synthetic resin film according to any one of (1) to (5). (7) The antibacterial synthetic resin stretched film according to any one of (1) to (6), wherein the printed material is laminated on the opposite side of the antibacterial surface layer, and the surface layer has a glossiness of 40%. The above antibacterial laminate. (8) The antibacterial synthetic resin stretched film according to any one of (1) to (6), which is printed on the surface opposite to the surface layer having antibacterial properties, and the printed surface and another laminated substrate are laminated,
An antibacterial laminate having a glossiness of the surface layer side of 40% or more. (9) The antibacterial laminate according to (7) or (8), wherein the printed material forming the laminate is paper or synthetic paper.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The antibacterial agent used in the present invention can be roughly classified into an organic antibacterial agent and an inorganic antibacterial agent. The organic antibacterial agent includes 2- (4-thiazolyl) benzimidazole, -(Methoxy-carbonyl-amino) -benzimidazole, bis (2-pyridylthio-1-oxide) zinc, p-chlorom-xylenol, 2-n-
Octyl-4-isothiazolin-3-one, 2,3
5,6, -tetrachloro-4- (methylsulfonyl)
-Pyridine, N- (fluorodichloromethylthio) -phthalimide and the like. Examples of inorganic antibacterial agents include inorganic compounds such as zeolite, silica, titanium oxide, amorphous aluminosilicate, zirconium phosphate, aluminum phosphate, and hydroxyapatite. Those carrying ions such as silver, copper, zinc, mercury, lead, tin, chromium, bismuth, cadmium, and thallium, which are generally known to have an antibacterial action by ion exchange or the like for a long time.

However, when an antimicrobial agent is blended into a synthetic resin, kneaded and used as a film, the organic antimicrobial agent is deposited (bleed out) of the compounded organic compound over time or extruded during kneading. Volatilization of organic compounds,
An antibacterial agent is preferably used as the antibacterial agent used in the present invention, because the antibacterial property is easily reduced by sublimation and decomposition. More preferably, it is practically preferable to use zeolite, silica, or titanium oxide having a high affinity for the synthetic resin as a carrier and to carry silver ions, copper ions, and zinc ions.

In the present invention, examples of the synthetic resin in which the antibacterial agent is blended include polypropylene resin, polyethylene resin, polyamide resin, polyester resin, polycarbonate resin, polyvinyl chloride resin, polyvinylidene chloride resin, and polystyrene resin. However, in view of the affinity with the antibacterial agent, preferably, a polypropylene resin, a polyethylene resin, a polyester resin, a polyvinyl chloride resin, and a polyamide resin are used to reduce microvoids formed between the antibacterial agent and the synthetic resin, and It is preferable not to impair the gloss. In the synthetic resin layer according to the present invention, if necessary, various additives such as heat stabilizers, antioxidants, light stabilizers, nucleating agents, flame retardants, pigments, dyes, etc., as long as the properties are not impaired. Can be added. Furthermore, if necessary, other thermoplastic resins, thermoplastic elastomers, rubbers, hydrocarbon resins, petroleum resins, and the like may be blended as long as the properties are not impaired.

The stretched film according to the present invention has a tensile modulus of 100 kg / m in either the machine direction or the transverse direction.
is that of the m ² or more films. Examples of the printed body to be laminated with the synthetic resin film include paper, synthetic paper, plastic sheets and the like which have been subjected to a printing process on the surface, and other substrates laminated with the printed synthetic resin film. Similarly, non-printed paper, synthetic paper, plastic sheet, plastic film, etc. can be exemplified, but conventionally, lamination printing lamination processing for imparting water resistance to the protective printing surface of printing ink and imparting strength to the printed body The medium is not particularly limited.

[0010] Both surfaces or one surface of the antibacterial synthetic resin film according to the present invention can be subjected to a surface treatment in order to improve printability laminating property and the like. Examples of the surface treatment method include a corona discharge treatment, a plasma treatment, a flame treatment, an acid treatment and the like, and a corona discharge treatment is particularly preferable from the viewpoint of easy operation and installation. Examples of the corona discharge treatment include a discharge treatment in an air atmosphere, a nitrogen gas atmosphere, a carbon dioxide gas atmosphere, or an inert gas atmosphere. Corona discharge treatment in an atmosphere of nitrogen gas is preferred from the viewpoints of performance and relatively low cost. Further, as a method of laminating the antibacterial synthetic resin film and the printed body, or laminating the printed antibacterial synthetic resin film and another base material, an adhesive dissolved in a solvent or the adhesive itself is synthesized. Resin film,
Alternatively, after applying to the printed material, the solvent is dried in a drying step if necessary, and thereafter, a method of laminating by thermocompression bonding, or a method in which a heat-sensitive adhesive resin is preliminarily laminated on the opposite surface of the surface layer of the synthetic resin film. And a method of laminating the printed body and the printed body only by thermocompression bonding (hereinafter referred to as a thermal laminating method). However, in the present invention, in consideration of a decrease in the antibacterial property of the antibacterial agent by a solvent or the like, the thermal laminating method However, the lamination method is not particularly limited.

The film for thermal laminating in the present invention is a film obtained by laminating a heat-sensitive adhesive resin on the opposite surface of one surface layer of a synthetic resin film having antibacterial properties, and refers to a film having at least the surface layer stretched. In other words, depending on the case, an adhesive resin layer or an adhesive layer for bonding the base resin and the heat-sensitive adhesive resin may further exist between the base resin layer including the surface layer and the heat-sensitive adhesive resin layer. The heat-sensitive adhesive resin refers to a resin that can be bonded to a printed body by thermocompression bonding, and is not particularly limited. For example, ethylene vinyl acetate copolymer, ethylene methyl methacrylate copolymer, ethylene ethyl methacrylate Copolymer, ethylene ethyl acrylate copolymer, ethylene methyl acrylate copolymer, ethylene propylene copolymer, ethylene propylene butene copolymer, ethylene butene copolymer, propylene butene copolymer, linear low molecular weight Examples thereof include polyethylene, low molecular weight polyethylene, ionomers, and maleic anhydride-modified resins thereof. As a method of laminating the heat-sensitive resin, a co-extrusion laminating method in which a base layer resin including a surface layer and a heat-sensitive adhesive layer resin are co-extruded from separate extruders, adhered in a die, and then stretched, or a base including the surface layer is stretched. An extrusion laminating method of extruding a material layer resin from an extruder, solidifying by cooling, and then laminating a heat-sensitive adhesive layer resin extruded from another extruder can be exemplified. In the case of extrusion lamination, the heat-sensitive adhesive layer resin can be laminated before or after stretching in the case of uniaxial stretching or simultaneous biaxial stretching, but either may be used. In the case of sequential biaxial stretching, the heat-sensitive adhesive resin can be laminated before stretching, after uniaxial stretching, after biaxial stretching, or the like, but any method may be used, and there is no particular limitation.

Further, the thickness of the surface layer having the antibacterial agent is
It is desirable that the thickness be 0.1 to 25 μm. More preferably, the thickness of the surface layer is desirably 0.5 to 10 μm. When the thickness of the surface layer exceeds 25 μm, the transparency is significantly impaired, and a laminate having poor appearance is obtained. When the thickness of the surface layer is less than 0.1 μm, the antibacterial agent particles are expected to fall off. It tends to be difficult to obtain antibacterial properties. The antibacterial property according to the present invention means that the Escherichia coli solution (IFO-12734) is dropped on the surface of a test piece, a film is adhered to the solution, stored at 25 ° C. for 24 hours, and then the number of viable bacteria on the test piece is measured. In the method for evaluating antibacterial activity, the number of viable bacteria / initial bacterial count after 24 hours is 1/10 or less.

The average particle size of the antibacterial agent is from 0.01 to
Desirably, it is 4 μm. More preferably 0.5
To 3 μm, and more preferably 0.8 to 2 μm. If it is less than 0.01 μm, the dispersibility tends to be extremely poor and the appearance tends to be impaired. Also, when it exceeds 4 μm, aggregates of the antibacterial agent itself start to be noticeable, and the gloss and transparency tend to be remarkably deteriorated.

It is desirable that the content of the antibacterial agent in the surface layer having the antibacterial agent is 0.05 to 2.0 wt%. More desirably, 0.3 to 1.0 wt% is desirable. When the content of the antibacterial agent in the surface layer is less than 0.05 wt%, the antibacterial property is poor, and when it exceeds 2.0 wt%, the transparency is impaired and the abrasion resistance is poor.

[0015] The dynamic friction coefficient of the surface layer of the film and the laminate is desirably 0.05 to 0.80. If it is less than 0.05, troubles due to misalignment due to excessive slipping are likely to occur when the film and the laminate are actually used, and if the dynamic friction coefficient of the surface layer exceeds 0.80, the film and the laminate are actually used. In such a case, the frictional resistance with other substances increases, and the resistance tends to damage the surface layer surface, which tends to impair the appearance. Examples of a method for controlling the dynamic friction coefficient of the surface layer of the film or the laminate to a range of 0.05 to 0.80 include mixing of a lubricant represented by fatty acid amide, mixing of various surfactants, and the like.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. Various measurements according to the examples of the present invention were performed by the following methods. [Method for evaluating antibacterial activity] Bacterial solution was dropped on the surface of the test piece, adhered with a film, stored at 25 ° C for 24 hours, and the viable cell count of the bacterial solution on the test piece was measured. The strain used was Escherichia coli (IFO-12734). [Glossiness Measurement Method] JIS Z8741 GS (4
5 °). [Dynamic friction coefficient measuring method] The dynamic friction coefficient was measured in accordance with ASTM D-1984. [Abrasion resistance evaluation method] A test piece was attached to a Gakushin abrasion tester so that the antibacterial surface layer sides of the test piece were in contact with each other, a load of 100 g was applied, and the state of the test piece after 100 reciprocations was sensed. evaluated. [Method of Measuring Wetness Index] Measured in accordance with JIS K6782. [Tensile strength measurement method] Measured according to JIS K6782. [Measurement method of elongation at break] It was measured according to JIS K6782. [Tensile modulus measurement method] Measured according to ASTM D-882. [Measurement Method of Moisture Permeability] Measured according to the cup method under the condition (A) of JIS Z 0208. [Haze measurement method] Haze was measured according to JIS K6782. Example 1 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 0.4 wt% of a silver zeolite-based antibacterial agent having an average particle diameter of 2.0 μm carrying zeolite as a carrier and silver and 0.4 wt% of stearyl monoglyceride. Using a separate extruder, a mixed surface layer (A) and an adhesive resin layer (B) composed of an ethylene ethyl acrylate copolymer [ethyl acrylate content 20 wt%, MFR (190 ° C.) = 8.0] A) is a resin temperature of 260 ° C., and (B) is a melt co-extruded laminate at 230 ° C., which is solidified by a metal drum cooled to 22 ° C., reheated, stretched 4 times in the machine direction, and further expanded horizontally. After stretching 10 times in the direction, 40W · min.
A corona discharge treatment was performed in a nitrogen gas atmosphere at a treatment strength of / m ² to form a stretched synthetic resin film having a thickness of (A) of 15 μm and a thickness of (B) of 15 μm. This film is further heated at 100 ° C. so that the printing paper and (B) come into contact with each other.
-Lamination was performed at a speed of 40 m / min. (A) antibacterial property, glossiness, coefficient of dynamic friction,
Table 1 shows the evaluation results of the wear resistance. The surface on the (A) side of the obtained laminate has the expected antibacterial properties,
Further, the obtained laminate had the expected high gloss and transparency, and was excellent in abrasion resistance.

[0017]

[Table 1]

Example 2 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 0.8 wt% of a silver-titanium oxide antibacterial agent having an average particle diameter of 0.1 μm carrying silver and titanium oxide as a carrier and stearic acid amide at 0.1 wt. 2 wt% mixed surface layer (A) and propylene ethylene copolymer [ethylene content 0.4 wt%, M
FR (230 ° C.) = 2.0] and a resin layer (B) obtained by mixing stearyl monoglyceride with 1.0 wt% using separate extruders, (A) at a resin temperature of 260 ° C., and (B)
Is solidified by a metal drum cooled to 22 ° C. after being melt co-extruded at 250 ° C., then reheated, stretched 4 times in the longitudinal direction, and further stretched 10 times in the transverse direction.
The corona discharge treatment is performed on the (B) side in the air at a treatment intensity of 40 W · min / m ² , and the thickness of (A) is 5 μm,
A synthetic resin stretched film having a thickness of (B) of 25 μm was formed. Print on the (B) side of this film, so that the (B) side and the cast polypropylene film are in contact,
Lamination was performed at 60 ° C. and at a speed of 120 m / min via the adhesive layer. Table 1 shows the evaluation results of the antibacterial property, glossiness, dynamic friction coefficient, and abrasion resistance of the (A) side of each of the obtained stretched synthetic resin film and printed laminate. Other physical properties of the obtained stretched synthetic resin film are shown in Table 2. The surface of the obtained film and laminate on the (A) side has the expected antibacterial properties, and the obtained film and laminate have the expected high gloss and transparency, and are abrasion resistant. It was an excellent one.

[0019]

[Table 2]

Example 3 Polyethylene terephthalate resin [density: 1.25 g / c]
m ³ , MFR (230 ° C.) = 4.0 g / 10 min]
A surface layer (A) obtained by mixing 1.0 wt% of a silver zeolite antibacterial agent having an average particle diameter of 2.0 μm and carrying 0.2% by weight of stearic amide with zeolite as a carrier and ethylene acrylic acid; Modified maleic anhydride of ethyl copolymer [Ethyl acrylate content 20 wt%, maleic anhydride modification rate 1.0%, MFR (190 ° C.) = 4.
0] using a separate extruder,
(A) is a resin temperature of 260 ° C., (B) is a melt co-extruded laminate at 230 ° C., which is solidified by a metal drum cooled to 22 ° C., reheated and stretched three times in the machine direction.
After stretching 3 times in the horizontal direction, 40W is applied to the (B) side.
Corona discharge treatment is performed in a nitrogen gas atmosphere with a treatment intensity of min / m ² , and the thickness of (A) is 15 μm and (B)
Was formed into a stretched synthetic resin film having a thickness of 15 μm.
This film is further contacted with the printing paper (B) so that
Lamination was performed at a speed of 100 mC / 40 m / min. Table 1 shows the evaluation results of the antibacterial property, the glossiness, the dynamic friction coefficient, and the abrasion resistance on the (A) side of the obtained laminate. The surface on the (A) side of the obtained laminate has the expected antibacterial properties, and the obtained laminate has the expected high gloss and transparency, and excellent abrasion resistance. Body.

Comparative Example 1 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min] and a surface layer (A) obtained by mixing 0.4% by weight of a silver zeolite antibacterial agent having an average particle diameter of 2.0 μm with zeolite as a carrier and silver supported thereon. Ethylene ethyl acrylate copolymer [ethyl acrylate content 20 wt%, MFR (190 ° C.) = 8.
0], except that a surfactant (stearyl monoglyceride) was not mixed with (A), except that the thickness of (A) was 15 μm. A synthetic resin stretched film having a thickness of (B) of 15 μm was formed, and this film was further coated with printing paper (B).
Were laminated at a speed of 100 ° C. and 40 m / min so that the contact was made. Table 1 shows the evaluation results of the antibacterial property, the glossiness, the dynamic friction coefficient, and the abrasion resistance on the (A) side of the obtained laminate.
Shown in The surface on the (A) side of the obtained laminate had the expected antibacterial properties, high glossiness, and transparency.
The laminate had a large dynamic friction coefficient and lacked abrasion resistance.

Comparative Example 2 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 0.4% by weight of a silver zeolite antibacterial agent having an average particle diameter of 2.0 μm using zeolite as a carrier and silver supported and 0.4% by weight of stearyl monoglyceride. The adhesive layer (B) composed of the surface layer (A) and the ethylene-ethyl acrylate copolymer [ethyl acrylate content 20 wt%, MFR (190 ° C.) = 8.0] was subjected to (A) using separate extruders. ) Is a resin temperature of 260 ° C., and (B) is a melt co-extruded laminate at 230 ° C., which is solidified by a metal drum cooled to 22 ° C., reheated, stretched 4 times in the machine direction, and further in the transverse direction. After stretching 10 times, the (B) side has 40 W · min /
A corona discharge treatment is performed in a nitrogen gas atmosphere with a treatment intensity of m ² , and the thickness of (A) is 35 μm and the thickness of (B) is 1
A 5 μm stretched synthetic resin film was formed. This film is further heated at 100 ° C. so that the printing paper and (B) come into contact with each other.
Lamination was performed at a speed of 40 m / min. Table 1 shows the evaluation results of the antibacterial property, the glossiness, the dynamic friction coefficient, and the abrasion resistance on the (A) side of the obtained laminate. The surface on the (A) side of the obtained laminate had the expected antibacterial properties, but the thickness of (A) was large and the laminate was poor in glossiness and transparency.

Comparative Example 3 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 0.4% by weight of a silver zeolite antibacterial agent having an average particle diameter of 5.0 μm carrying zeolite as a carrier and silver and 0.4% by weight of stearyl monoglyceride was mixed. The adhesive layer (B) composed of the surface layer (A) and the ethylene-ethyl acrylate copolymer [ethyl acrylate content 20 wt%, MFR (190 ° C.) = 8.0] was subjected to (A) using separate extruders. ) Is a resin temperature of 260 ° C., and (B) is a melt co-extruded laminate at 230 ° C., which is solidified by a metal drum cooled to 22 ° C., reheated, stretched 4 times in the machine direction, and further in the transverse direction. After stretching 10 times, the (B) side has 40 W · min /
A corona discharge treatment was performed in a nitrogen gas atmosphere at a treatment intensity of m ² , and the thickness of (A) was 15 μm and the thickness of (B) was 1
A 5 μm stretched synthetic resin film was formed. This film is further heated at 100 ° C. so that the printing paper and (B) come into contact with each other.
Lamination was performed at a speed of 40 m / min. Table 1 shows the evaluation results of the antibacterial property, the glossiness, the dynamic friction coefficient, and the abrasion resistance on the (A) side of the obtained laminate. The surface on the (A) side of the obtained laminate shows the expected antibacterial properties, but the average particle size of the antibacterial agent mixed in (A) is large, the appearance is poor, and the gloss and transparency are poor. there were.

Comparative Example 4 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 4.0 wt% of a silver zeolite antibacterial agent having an average particle diameter of 2.0 μm using silver as a carrier and 0.4 wt% of stearyl monoglyceride was used. Using a separate extruder, a mixed surface layer (A) and an adhesive resin layer (B) composed of an ethylene ethyl acrylate copolymer [ethyl acrylate content 20 wt%, MFR (190 ° C.) = 8.0] A) is a resin temperature of 260 ° C., and (B) is a melt co-extruded laminate at 230 ° C., which is solidified by a metal drum cooled to 22 ° C., reheated, stretched 4 times in the machine direction, and further expanded horizontally. After stretching 10 times in the direction, 40W · min.
A corona discharge treatment was performed in a nitrogen gas atmosphere at a treatment strength of / m ² to form a stretched synthetic resin film having a thickness of (A) of 15 μm and a thickness of (B) of 15 μm. This film is further heated at 100 ° C. so that the printing paper and (B) come into contact with each other.
-Lamination was performed at a speed of 40 m / min. (A) antibacterial property, glossiness, coefficient of dynamic friction,
Table 1 shows the evaluation results of the wear resistance. The surface on the (A) side of the obtained laminate showed the expected antibacterial properties.
The antibacterial agent of the present invention contained a large amount of antibacterial agent, and lacked in glossiness, transparency, and abrasion resistance.

Comparative Example 5 Propylene homopolymer [density 0.90 g / cm ³ , MF
R (230 ° C.) = 2.0 g / 10 min], 0.01 wt% of a silver titanium oxide-based antibacterial agent having an average particle diameter of 0.1 μm carrying silver and titanium oxide as a carrier and stearic acid amide at 0.1%. 2% by weight of a surface layer (A) and a propylene-ethylene copolymer [ethylene content 0.4% by weight,
MFR (230 ° C.) = 2.0] and a resin layer (B) obtained by mixing 1.0 wt% of stearyl monoglyceride with a separate extruder, (A) using a resin temperature of 260 ° C.
(B) is a melt co-extruded laminate at 250 ° C.
After being solidified by a metal drum cooled to 2 ° C., it is reheated, stretched 4 times in the machine direction, further stretched 10 times in the transverse direction, and then treated on the (B) side with a processing strength of 40 W · min / m ^2. Corona discharge treatment in air, (A) thickness 5 μm
Thus, a stretched synthetic resin film having a thickness of (B) of 25 μm was formed. Table 1 shows the evaluation results of the antibacterial properties, glossiness, dynamic friction coefficient, and abrasion resistance of the obtained stretched synthetic resin film.
Table 2 shows other physical properties of this film. The gloss, transparency and abrasion resistance of the obtained film were satisfactory, but the antibacterial property of the (A) face was far from expected.

[0026]

The stretched antibacterial synthetic resin film and antibacterial laminate of the present invention have excellent antibacterial properties, glossiness, transparency, and abrasion resistance. It can be suitably used for print laminate materials such as covers. Furthermore, the stretched antibacterial synthetic resin film and the antibacterial laminate of the present invention can be applied to various uses other than those described above, making use of excellent antibacterial properties, gloss, transparency, and abrasion resistance.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08J 7/04 C08J 7/04 Z C08K 3/00 C08K 3/00 3/08 3/08 C08L 23/04 C08L 23/04 23 / 10 23/10 67/02 67/02 77/00 77/00 101/00 101/00 // B29C 55/12 B29C 55/12 B29K 9:00 105: 16

Claims (9)

[Claims] 1. A stretched antibacterial synthetic resin film having an antibacterial surface layer on at least one surface and having a glossiness of 100% or more on the surface layer side. 2. The stretched antibacterial synthetic resin film according to claim 1, wherein the antibacterial agent contained in the surface layer having antibacterial properties is an inorganic compound carrying silver, copper and zinc. . 3. The stretched antibacterial synthetic resin film according to claim 1, wherein the carrier of the antibacterial agent contained in the surface layer having antibacterial properties is silica, titanium oxide, or zeolite. 4. The resin according to claim 1, wherein the synthetic resin forming the antibacterial surface layer is a resin selected from a polypropylene resin, a polyester resin, a polyvinyl chloride resin, a polyethylene resin, and a polyamide resin. The stretched antibacterial synthetic resin film according to any one of the above. 5. The antibacterial agent contained in the surface layer having antibacterial properties has an average particle size of 0.01 to 4 μm, and the content of the antibacterial agent in the surface layer is 0.05 to 2.0 wt%. The stretched antibacterial synthetic resin film according to any one of claims 1 to 4, wherein the dynamic friction coefficient of the surface layer is 0.05 to 0.80. 6. The antibacterial surface layer having a thickness of 0.1
The stretched antibacterial synthetic resin film according to any one of claims 1 to 5, wherein the thickness is from 25 to 25 µm. 7. The stretched antibacterial synthetic resin film according to any one of claims 1 to 6, wherein the opposite side of the antibacterial surface layer and the printed body are laminated, and the glossiness of the surface layer side is 40.
% Or more antibacterial laminate. 8. An antibacterial synthetic resin stretched film according to any one of claims 1 to 6, wherein the stretched film is printed on the opposite surface of an antibacterial surface layer, and the printed surface and another laminate substrate are laminated. An antibacterial laminate having a glossiness of the surface layer side of 40% or more. 9. The antibacterial laminate according to claim 7, wherein the printed material forming the laminate is paper or synthetic paper.