JP2019206099A - Liquid repellent bag and liquid repellent film - Google Patents

Abstract

To provide a liquid repellent bag and a liquid repellent film capable of satisfactorily suppressing the sticking of a liquid.SOLUTION: A liquid repellent bas in which a base material and a laminated film having a liquid repellent layer laminated in order are formed into a bag shape comprises an inner face composed of the liquid repellent layer. The liquid repellent layer includes: a thermoplastic resin; a liquid repellent resin; and a filler. The surface of the liquid repellent layer is provided with a rugged part owing to the filler, and, when, viewed from the thickness direction of the liquid repellent layer, provided that the area of the liquid repellent layer is defined as M1 and the area in which the filler is present in the area of the liquid repellent layer is defined as M2, M2/M1 is 0.01 to 0.5.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid repellent container and a liquid repellent film.

  In many fields such as foods, beverages, pharmaceuticals, and chemicals, containers corresponding to their contents have been developed. As one of the functions of such a container, a function for preventing contents such as liquid from adhering to the inner surface of the container is required. For example, Patent Document 1 below discloses a resin layer comprising a resin layer comprising a thermoplastic resin and a silylated polyolefin, and having a water contact angle of 100 degrees or more on the surface thereof. An aqueous film is disclosed.

JP 2015-24548 A

  When a bag using a water-repellent film as shown in Patent Document 1 is formed and liquid is stored in the bag, the liquid tends to hardly adhere to the inner surface of the bag. However, at the time of discharging the liquid from the bag, for example, at least a part of the liquid remains attached to the inner surface of the bag, and the adhesion preventing property to the inner surface of the liquid is insufficient. Therefore, further improvement is required for the adhesion prevention property of the liquid in the film.

  An object of one aspect of the present invention is to provide a liquid repellent bag and a liquid repellent film that can satisfactorily suppress the adhesion of liquid.

  The liquid repellent bag according to one aspect of the present invention is a liquid repellent bag having an inner surface constituted by a liquid repellent layer in which a laminated film having a base material and a liquid repellent layer sequentially laminated is formed in a bag shape, The liquid repellent layer includes a thermoplastic resin, a liquid repellent resin, and a filler. On the surface of the liquid repellent layer, an uneven portion due to the filler is provided, and viewed from the thickness direction of the liquid repellent layer, When the area of the liquid repellent layer is M1, and the area of the liquid repellent layer where the filler exists is M2, M2 / M1 is 0.01 or more and 0.5 or less.

  According to this liquid repellent bag, the inner surface is constituted by the liquid repellent layer. For this reason, even if it is a case where a liquid is accommodated in a liquid repellent bag, it becomes difficult for a liquid to adhere to the inner surface. Moreover, the uneven | corrugated | grooved part resulting from a filler is provided in the surface of a liquid repellent layer. Thereby, since the inner surface of the liquid repellent bag is rough, the inner surface is less likely to get wet. In addition, when a part of the liquid-repellent layer facing each other and the other part are close to each other on the inner surface, the liquid is caused to exist between the part and the other part due to the presence of the part of the convex part and the convex part of the other part. It becomes difficult to stay between. For this reason, a part of the liquid repellent layer and the other part are not easily blocked by the liquid. Here, since M2 / M1 is 0.01 or more, it is possible to provide many portions in the liquid repellent bag that are not easily blocked by the liquid. Therefore, according to the said liquid repellent bag, the liquid repellent bag which can suppress adhesion of a liquid favorably is provided. Furthermore, when M2 / M1 is 0.5 or less, the liquid repellent layer can be formed with high quality.

  In the liquid repellent layer, T2 / T1 may be 0.05 or more and 15 or less, where T1 is a thickness of a flat portion where no filler exists and T2 is an average particle diameter of the filler. In this case, the location where a part of the liquid repellent layer facing each other and the other part are blocked by the liquid can be further reduced. In addition, the filler can be prevented from falling off the liquid repellent layer.

  In the liquid repellent layer, the ratio of the thermoplastic resin to the total mass of the liquid repellent resin and the thermoplastic resin may be 70% or more and 99% or less. In this case, the adhesion of the liquid to the liquid repellent bag can be suppressed better. In addition, a liquid repellent layer can be formed with high quality.

  The average particle size of the filler may be 5 μm or more and 60 μm or less. In this case, since the uneven portion can be satisfactorily formed in the liquid repellent layer, the adhesion of the liquid to the liquid repellent bag can be suppressed more favorably. In addition, the filler can be prevented from falling off the liquid repellent layer.

  The laminated film may further include an adhesive layer sandwiched between the base material and the liquid repellent layer. In this case, the sealing property of the liquid repellent bag can be improved.

  The liquid repellent resin may contain a silylated polyolefin. In this case, both the oil repellency and heat sealability of the liquid repellent layer can be exhibited well.

  The liquid repellent bag protrudes from a part of the main body part that contains the liquid, the discharge part communicating with the main body part, and the liquid repellent layer is heat sealed, and the main body part and the discharge part are sealed. And a heat sealing part that performs the above-described process. Even when the liquid is discharged from the main body through such a discharge portion, the adhesion of the liquid to the liquid repellent bag can be satisfactorily suppressed.

  A liquid repellent film according to another aspect of the present invention includes a base material, and a liquid repellent layer provided on the base material and including a thermoplastic resin, a liquid repellent resin, and a filler. The surface is provided with irregularities due to the filler, and the area of the liquid repellent layer is M1 when viewed from the thickness direction of the liquid repellent layer, and the area of the liquid repellent layer where the filler exists is M2. M2 / M1 is 0.01 or more and 0.5 or less.

  According to this liquid repellent film, the surface of the liquid repellent layer is provided with uneven portions. Thereby, the surface of a liquid repellent layer becomes difficult to get wet. In addition, for example, when a liquid repellent film is folded and a part of the liquid repellent layer and another part are brought close to each other through the liquid, the presence of the convex part of the part and the convex part of the other part exists. This makes it difficult for the liquid to stay between the part and the other part. For this reason, a part of the liquid repellent layer and the other part are not easily blocked by the liquid. Here, since M2 / M1 is 0.01 or more, it is possible to provide a large number of portions that are not easily blocked by the liquid in the part and the other part of the liquid repellent layer. Therefore, for example, when a bag or the like is formed using the liquid repellent film, it is possible to satisfactorily suppress the liquid contained in the bag from adhering to the inner surface. Furthermore, when M2 / M1 is 0.5 or less, the liquid repellent layer can be formed with high quality.

  According to one aspect of the present invention, it is possible to provide a liquid repellent bag and a liquid repellent film that can satisfactorily suppress liquid adhesion.

Fig.1 (a) is a schematic sectional drawing of a liquid repellent film. FIG. 1B is a schematic plan view of a part of the liquid repellent film. FIG. 2 is a schematic view showing a liquid repellent bag according to the embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a diagram illustrating the liquid repellent bag according to the reference example when the liquid is discharged. FIG. 5 is a photograph showing a state in which a part of the liquid repellent bag according to the reference example is closed with colored oil. FIG. 6 is a diagram illustrating the liquid repellent bag according to the embodiment when the liquid is discharged.

  Hereinafter, preferred embodiments of one aspect of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same elements or elements having the same functions, and redundant description is omitted.

<Liquid repellent film>
First, an example of the liquid repellent film used in the liquid repellent bag according to the present embodiment will be described in detail with reference to FIGS. 1 (a) and 1 (b). Fig.1 (a) is a schematic sectional drawing of a liquid repellent film. FIG. 1B is a schematic plan view of a part of the liquid repellent film. As shown in FIG. 1A, a liquid repellent film 10 includes a base material 11, an adhesive layer 12 provided on the base material 11, and a liquid repellent layer 13 provided on the adhesive layer 12. And exhibits flexibility. The surface of the liquid repellent film 10 may be provided with design properties such as letters and patterns by, for example, printing or bonding.

  The substrate 11 is not particularly limited as long as it is a support, and the material thereof is required performance (for example, gas barrier properties, light shielding properties, heat resistance, water resistance, temperature and humidity resistance, mechanical strength, printing). It can be changed according to ease or decoration ease. The base material 11 has at least 1 type of paper, the film containing resin, and metal foil, for example. Examples of the paper include high-quality paper, special high-quality paper, coated paper, art paper, cast-coated paper, imitation paper, and craft paper. Examples of the resin-containing film include polyolefin, acid-modified polyolefin, polyester, polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polyamide (PA), polyvinyl chloride (PVC), cellulose acetate, and cellophane resin. A film containing at least one kind is mentioned. This film may be a stretched film or an unstretched film. Examples of the metal foil include aluminum foil and nickel foil. When the base material 11 is a laminated body, for example, an adhesive or the like may be used. The base material 11 may be formed from a material wound in a roll shape.

  Moreover, the base material 11 may have barrier films, such as a barrier film, an inorganic vapor deposition film, or metal foil. The barrier film has a function of inhibiting liquid and air from passing through the liquid repellent film 10 and a function of suppressing light from passing through the liquid repellent film 10.

  Examples of the barrier film include a film composed of polyvinylidene chloride (PVDC), ethylene vinyl alcohol copolymer (EVOH), polyacrylonitrile (PAN), polyvinyl alcohol (PVA), or the like. Further, as the barrier film, a PET film, a stretched olefin resin film such as polyethylene (PE) or polypropylene (PP), a polyamide film, a polyvinyl chloride film, a cellulose acetate film, or a cellophane film may be used. In this case, a PVDC coat, a PVA coat, an acrylic resin coat or the like may be applied to the surfaces of these films.

  Further, as the barrier film, a PVDC coextruded film, EVOH coextruded film, nylon (ONY) coextruded film, OPP coextruded film, or the like may be used.

  An inorganic vapor deposition film is a film formed by vapor-depositing aluminum, an alumina, or a silica etc. with respect to a stretched olefin resin film, a polyamide film, a polyvinyl chloride film, a cellulose acetate film, or a cellophane film, for example.

  The adhesive layer 12 is a layer that exhibits adhesiveness when a part of the liquid repellent film 10 is attached to another part or when an object such as a container is packaged by the liquid repellent film 10. The adhesive layer 12 is sandwiched between the base material 11 and the liquid repellent layer 13 in the liquid repellent film 10. The adhesive layer 12 is, for example, a heat seal layer that thermally welds a part of the liquid repellent film 10 and the other part, and includes a thermoplastic resin. The thermoplastic resin includes, for example, linear low density polyethylene (LLDPE), polypropylene, ethylene-unsaturated ester copolymer resin, or polyester copolymer resin. Although the thickness of the contact bonding layer 12 is 20 micrometers or more and 100 micrometers or less, for example, it is not restricted to this. The adhesive layer 12 may be adhered to the base material 11 through an adhesive, for example. This adhesive may be different from the thermoplastic resin.

  When the liquid repellent film 10 is used as a lid material or the like attached to a container or the like, the adhesive layer 12 may include a known hot melt adhesive. In this case, the softening point of the hot melt adhesive is, for example, 90 ° C. or higher. Moreover, the melt viscosity of the hot melt adhesive at 160 ° C. is, for example, 4000 mPa · s or more. When the softening point and melt viscosity of the hot melt adhesive satisfy the above ranges, the adhesive layer 12 can have heat resistance against drying and the like. The softening point of the hot melt adhesive is measured by, for example, the method specified in JIS K 6863: 1994 or the ring and ball method based on JIS K 2351. The melt viscosity of the hot melt adhesive is measured using, for example, a B-type rotational viscometer.

  The liquid repellent layer 13 is a layer that has the property of repelling liquids such as water and oil. The liquid repellent layer 13 includes a resin portion 14 containing a thermoplastic resin and a liquid repellent resin, and a filler 15 dispersed in the resin portion 14. In this specification, the liquid repellency is a property having water repellency and oil repellency.

  On the surface of the liquid repellent layer 13, an uneven portion 13 a caused by the filler 15 is provided. That is, a plurality of convex portions and a plurality of concave portions are provided on the surface of the liquid repellent layer 13. Each convex part is comprised from the resin part 14 and the filler 15, and each recessed part is comprised only from the resin part 14. FIG. For this reason, each recessed part is equivalent to the flat part in which the filler 15 does not exist in the liquid repellent layer 13. In the liquid repellent layer 13, the filler 15 does not exist, and the thickness T1 of the flat portion composed only of the resin portion 14 is, for example, 5 μm or more and 30 μm. When the thickness T1 is 5 μm or more, it is possible to favorably suppress the filler 15 from falling off the resin portion 14. When the thickness T <b> 1 is 30 μm or less, the uneven portion 13 a can be satisfactorily formed in the liquid repellent layer 13. The lower limit value of the thickness T1 is not limited to 5 μm, and may be, for example, 10 μm, 15 μm, or 20 μm. Similarly, the upper limit value of the thickness T1 is not limited to 30 μm, may be 25 μm, 20 μm, 15 μm, or 10 μm. The thickness T1 is an average thickness of a flat portion measured by a scanning electron microscope (SEM) by exposing a cross section of the liquid repellent layer 13 using, for example, an ultramicrotome. The average thickness of the flat portion is an average value of the thicknesses at any five locations (flat portions) where no filler is present in the liquid repellent layer 13. Further, the protruding amount of the convex portion in the thickness direction of the liquid repellent layer 13 (hereinafter simply referred to as “thickness direction X”) corresponds to the distance from the concave portion to the convex portion along the thickness direction.

  The resin portion 14 is an organic compound layer that exhibits liquid repellency and covers the adhesive layer 12. The resin part 14 is obtained, for example, by molding (for example, extrusion molding) a resin in which a liquid repellent resin is melted and mixed with a thermoplastic resin. The thermoplastic resin contained in the resin portion 14 is the same as the thermoplastic resin contained in the adhesive layer 12. For this reason, the resin portion 14 exhibits a heat seal property similarly to the adhesive layer 12. The liquid repellent resin contained in the resin portion 14 includes at least one of, for example, a fluororesin, a fluorocopolymer, a silylated resin, and the like. The fluororesin is, for example, polytetrafluoroethylene (PTFE). The fluorine copolymer is, for example, a copolymer of PTFE and ethylene, a block copolymer of a fluorine-containing block segment and a non-fluorine block segment, or the like. The silylated resin is a silylated polyolefin such as a PE-Si block copolymer. In the present embodiment, silylated polyolefin is used as the liquid repellent resin from the viewpoint of liquid repellency and heat sealability.

  The ratio of the thermoplastic resin in the resin portion 14 is larger than the ratio of the liquid repellent resin. In the present embodiment, the ratio (γ / (α + γ)) of the thermoplastic resin mass γ to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin is, for example, 60% or more and 99.5% or less. The lower limit of the ratio is not limited to 60%, and may be, for example, 70%, 80%, or 90%. Similarly, the upper limit value of the ratio is not limited to 99.5%, and may be 99%, 90%, or 80%, for example. When the ratio is 70% or more, the resin portion 14 can easily spread on the adhesive layer 12, and the liquid repellent layer 13 can be formed with higher quality. When the ratio is 99% or less, the liquid repellent layer 13 can exhibit better liquid repellency.

  The filler 15 is a powder serving as a core that forms the uneven portion 13 a of the liquid repellent layer 13, and is fixed by the resin portion 14. In this embodiment, the filler 15 is covered with the resin portion 14, but a part of the filler 15 may be exposed from the resin portion 14. The filler 15 may be organic compound particles or inorganic compound particles. Examples of the organic compound particles include acrylic particles, styrene particles, acrylic-styrene particles, and silicone particles. Examples of the inorganic compound particles include silica particles.

  The average particle diameter T2 of the filler 15 is, for example, 1 μm or more and 90 μm or less. The lower limit value of the average particle diameter T2 is not limited to 1 μm, and may be 2 μm, 4 μm, 5 μm, or 20 μm, for example. Similarly, the upper limit value of the average particle diameter T2 is not limited to 90 μm, and may be, for example, 70 μm, 60 μm, 55 μm, or 20 μm. When the average particle size T2 is 5 μm or more, the uneven portion 13a can be satisfactorily formed in the liquid repellent layer 13. When the average particle size T2 is 60 μm or less, it is possible to suppress the filler 15 from dropping from the liquid repellent layer 13. The average particle diameter T <b> 2 of the filler 15 is calculated from the particle diameter of the filler 15 that is confirmed from the surface of the liquid repellent layer 13. The particle size of the filler 15 is defined as, for example, a value measured by visual observation with an SEM. As a measuring method of the average particle diameter of the filler 15, first, arbitrary five places are measured by SEM. Next, the particle size of 100 fillers 15 confirmed on each observation surface is measured. And the average particle diameter of the filler 15 is calculated | required by calculating the average value of all the measured values of each observation surface.

  In the liquid repellent layer 13, a value (T2 / T1) obtained by dividing the average particle size T2 of the filler 15 by the thickness T1 of the flat portion is, for example, 0.03 or more and 18 or less. The lower limit value of T2 / T1 is not limited to 0.03, and may be, for example, 0.05, 0.07, 0.13, 0.17, or 0.67. Similarly, the upper limit value of T2 / T1 is not limited to 18, but may be 15, for example, 11, 11, 7, or 2. When T2 / T1 is 0.05 or more, for example, when a part of the liquid-repellent layer 13 facing each other and the other part come into contact with each other, a gap can be reliably formed between the part and the other part. . When T2 / T1 is 15 or less, the filler 15 can be prevented from falling off the liquid repellent layer 13.

  In FIG. 1 (b), each filler 15 included in the liquid repellent film 10 is hatched. In FIG. 1B, when viewed from the thickness direction X (in plan view), the area of the liquid repellent layer 13 is defined as area M1, and the area where the filler 15 is present in the area M1 of the liquid repellent layer 13 is defined as area M2. And The area M1 corresponds to the area of the entire region surrounded by the square frame in FIG. The area M2 corresponds to the total area of the hatched portion in FIG. The area M2 can be adjusted by at least one of changing the type of the filler 15 and changing the amount of the filler 15 included in the liquid repellent layer 13.

  A value (M2 / M1) obtained by dividing the area M2 by the area M1 is 0.01 or more and 0.5 or less. The lower limit value of M2 / M1 is not limited to 0.01, and may be 0.15 or 0.27, for example. Similarly, the upper limit value of M2 / M1 is not limited to 0.5, and may be 0.27 or 0.15, for example. When M2 / M1 is 0.01 or more, for example, when a part of the liquid repellent layer 13 facing each other and the other part come into contact with each other, a large number of gaps can be formed between the part and the other part. . When M2 / M1 is 0.5 or less, the liquid repellent layer 13 can be formed with high quality. The area M1 in the present embodiment is, for example, a visual field range that can be observed with a microscope, and the area M2 is an area occupied by a filler that can be detected when the brightness of the microscope is set to 0 to 130 in the visual field range.

<Liquid repellent bag>
FIG. 2 is a schematic view showing a liquid repellent bag according to the present embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. The liquid repellent bag 1 shown in FIG. 2 and FIG. 3 is formed into a bag shape by heat-sealing the end of the liquid repellent film 10 that is folded in half. For example, the liquid L is accommodated therein. Since the liquid repellent film 10 exhibits flexibility, the liquid repellent bag 1 can exhibit flexibility. The inner surface 1 a of the liquid repellent bag 1 is constituted by a liquid repellent layer 13, and the outer surface 1 b of the liquid repellent bag 1 is constituted by a base material 11. Therefore, in the liquid repellent bag 1, a part of the liquid repellent layer 13 and the other part face each other and are in contact with the liquid L. The liquid L is water, oil, soft drinks, alcoholic beverages, organic solvents, etc., for example.

  The liquid repellent bag 1 includes a main body part 2, a discharge part 3 communicating with the main body part 2, and a heat sealing part 4. The main body 2 is a main part of the liquid repellent bag 1 and is a part that accommodates the liquid L. The main body 2 in a plan view has a substantially rectangular shape. A bent portion 2 a formed by bending the liquid repellent film 10 is provided in a part of the main body portion 2.

  The discharge part 3 is a part for discharging the liquid L accommodated in the main body part 2. The discharge unit 3 communicates with the end of the main body 2 and protrudes from the main body 2. Thereby, the location where the user of liquid repellent bag 1 tends to discharge liquid L can be grasped easily. In this embodiment, it protrudes from one of the corners provided in the main body 2.

  The heat sealing portion 4 is a portion that seals the main body portion 2 and the discharge portion 3, and is provided along the edge of the liquid repellent bag 1. In the heat sealing part 4, the adhesive layer 12 and the liquid repellent layer 13 in the liquid repellent film 10 are formed by heat sealing. In this embodiment, although the heat sealing part 4 is provided in the both ends of the bending part 2a, you may provide in the whole bending part 2a. A notch may be provided in a part of the portion provided along the edge of the discharge portion 3 in the heat sealing portion 4. In this case, the discharge part 3 can be easily broken using the notch, and the liquid L can be discharged from the discharge part 3.

  Next, the effect obtained by the liquid repellent bag 1 formed with the liquid repellent film 10 demonstrated above is demonstrated, referring FIGS. 4-6. FIG. 4 is a diagram illustrating the liquid repellent bag according to the reference example when the liquid is discharged. FIG. 5 is a photograph showing a state in which a part of the liquid repellent bag according to the reference example is closed with colored oil. FIG. 6 is a diagram illustrating the liquid repellent bag according to the present embodiment when the liquid is discharged.

  The liquid repellent bag 100 according to the reference example shown in FIG. 4 has the same configuration as the liquid repellent bag 1 of the present embodiment except that the liquid repellent layer 113 does not contain a filler. For this reason, the surface of the liquid repellent layer 113 is flat, but it is difficult for liquid to adhere to the surface. Here, when the liquid L is discharged from the liquid repellent bag 100, the inner surfaces 100a of the liquid repellent bags 100 come close to each other due to the liquid repellent bag 100 being bent. As a result, a part of the liquid repellent layer 113 that constitutes the inner surface 100a and faces each other is brought close to the other part. At this time, the liquid L located between a part of the liquid repellent layer 113 and the other part adheres and stops flowing, and the liquid L closes the part of the liquid repellent layer 113 and the other part. The discharge of the liquid L may be inhibited. FIG. 5 shows an example of blockage between a part of the liquid repellent layer 113 and the other part by the liquid L. FIG. 5 shows a state where the liquid repellent bag 100 containing the colored oil is inverted, and then the liquid repellent bag 100 is slanted and allowed to stand for 30 seconds. As shown in FIG. 5, a part and the other part of the liquid repellent layer 113 are closed by the liquid L, and the liquid L remains in the closed part and a region surrounded by the part.

  When the blockage with the liquid L as described above occurs, the liquid L cannot be completely discharged from the liquid repellent bag 100, or it takes time for the liquid L to be completely discharged. The phenomenon that the liquid L adheres to and closes a part of the liquid repellent layer 113 and the other part occurs due to the surface tension of the liquid L. Specifically, the vertical component along the liquid repellent layer 113 in the surface tension of the liquid L tries to lift the liquid L positioned between a part of the liquid repellent layer 113 and the other part, thereby causing the above phenomenon. (So-called capillary phenomenon) occurs. The above phenomenon is more likely to occur as a part of the liquid repellent layer 113 and the other part are closer to each other. This is because the force applied per unit cross-sectional area of the liquid L located between a part of the liquid repellent layer 113 and the other part is increased. Moreover, the said component becomes so strong that the surface of the liquid repellent layer 113 is flat.

  On the other hand, according to the liquid repellent bag 1 formed using the liquid repellent film 10 according to the present embodiment, the inner surface 1 a is constituted by the liquid repellent layer 13. For this reason, even when the liquid L is stored in the liquid repellent bag 1, the liquid L is difficult to adhere to the inner surface 1a. Further, the surface of the liquid repellent layer 13 is provided with an uneven portion 13 a caused by the filler 15. Thereby, since the inner surface 1a is rough, the inner surface 1a becomes difficult to get wet. In addition, as shown in FIG. 6, when a part of the liquid-repellent layer 13 facing each other on the inner surface 1 a and the other part are close to each other, due to the presence of the part of the convex part and the convex part of the other part, The interval between the flat portions of the liquid repellent layer 13 can be increased. For this reason, compared with the said reference example, the force added per unit cross-sectional area of the liquid L located between the flat parts of the liquid repellent layer 13 becomes small. As a result, the liquid L is less likely to stay between the flat portions, so that the flat portions of the liquid repellent layer 13 are not easily blocked by the liquid L. Here, since M2 / M1 is 0.01 or more, it is possible to provide a large number of locations in the liquid repellent bag 1 that are not easily blocked by the liquid L. Therefore, according to the present embodiment, the portion where the liquid repellent layer 13 facing each other and the other portion are blocked by the liquid L can be reduced, so that the liquid repellent bag 1 capable of satisfactorily suppressing the adhesion of the liquid L is provided. it can. Furthermore, when M2 / M1 is 0.5 or less, the liquid repellent layer 13 can be formed with high quality.

  In the present embodiment, T2 / T1 may be 0.05 or more and 15 or less. For this reason, the location where a part of the liquid repellent layer 13 facing each other and the other part are blocked by the liquid L can be further reduced. In addition, the filler 15 can be prevented from falling off the liquid repellent layer 13.

  In the present embodiment, the ratio of the thermoplastic resin to the total mass of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer 13 may be 70% or more and 99% or less. For this reason, adhesion of the liquid L to the liquid repellent bag 1 can be suppressed more favorably. In addition, the liquid repellent layer 13 can be formed with high quality.

  In the present embodiment, the average particle size of the filler 15 may be 5 μm or more and 60 μm or less. For this reason, the uneven | corrugated | grooved part 13a can be favorably formed in the liquid repellent layer 13, and adhesion of the liquid L to the liquid repellent bag 1 can be suppressed more favorably. In addition, the filler 15 can be prevented from falling off the liquid repellent layer 13.

  In this embodiment, the liquid repellent film 10 which is a laminated film includes an adhesive layer 12 sandwiched between a base material 11 and a liquid repellent layer 13. For this reason, since both the liquid repellent layer 13 and the adhesive layer 12 are heat-sealed, the sealing performance of the liquid repellent bag 1 can be improved.

  In the present embodiment, the liquid repellent bag 1 has a main body 2 that contains the liquid L, a discharge portion 3 that protrudes from a part of the main body 2 and communicates with the main body 2, an adhesive layer 12, and a liquid repellent layer. 13 may be heat-sealed and may include a heat sealing portion 4 that seals the main body portion 2 and the discharge portion 3. Even when such a discharge portion 3 is provided, the adhesion of the liquid L to the liquid repellent bag 1 can be satisfactorily suppressed.

  The liquid repellent resin may contain a silylated polyolefin. For this reason, both the oil repellency and heat sealability of the liquid repellent layer can be exhibited well.

  The liquid repellent bag and the liquid repellent film according to one aspect of the present invention are not limited to the above embodiment. For example, in the said embodiment, although the liquid L is accommodated in the main-body part 2 of the liquid repellent bag 1, it is not restricted to this. The main body 2 may contain liquid, semi-solid, or gel contents. That is, the main body 2 may contain a substance capable of acting on the surface tension, such as a liquid. Specific examples of the contents include foods such as water, oil, drink, yogurt, jelly, curry, pudding, syrup, jam, mousse, porridge, and soup, pharmaceuticals, cosmetics, and chemicals. Alternatively, the main body 2 may contain, for example, sterilized sanitary products, medical products, solid food products, and the like.

  In the said embodiment, although an contact bonding layer is provided between a base material and a liquid repellent layer, it is not restricted to this. That is, the liquid repellent film may not have an adhesive layer. In this case, the liquid repellent bag may be formed using a liquid repellent film in which a base material and a liquid repellent layer are sequentially laminated. For example, after the surface treatment is performed on one surface of the liquid repellent layer, the one surface and the base material may be bonded to each other through the above-described adhesive.

  In the said embodiment, although the discharge part protrudes from one of the corner | angular parts provided in the main-body part in a liquid repellent bag, it is not restricted to this. The discharge part may be simply provided at the end of the main body part. Or the discharge part does not need to be provided in the liquid repellent bag. Further, the liquid repellent bag may not be provided with a cut.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1
First, VMPET (“1510 (# 12)” manufactured by Toray Film Processing Co., Ltd.) to which a nylon (ONY) coextruded film was attached as a barrier film was prepared. Moreover, the laminated body of the contact bonding layer which consists of thermoplastic resins, and the liquid repellent layer containing a thermoplastic resin, a liquid repellent resin, and a filler was formed using the film making machine. Then, VMPET and the laminate were dry-laminated using a urethane-based adhesive (“Takelac” and “Takenate” manufactured by Mitsui Chemicals, Inc.) to form the liquid repellent film shown in FIG.

  In Example 1, “Evolution SP2020”, which is polyethylene manufactured by Prime Polymer Co., Ltd., was used as the thermoplastic resin contained in the adhesive layer and the liquid repellent layer. As the liquid repellent resin, “EXFORA (registered trademark)” which is a silylated polyolefin manufactured by Mitsui Chemicals Fine Co., Ltd. was used. “SX-350H” manufactured by Soken Chemical Co., Ltd. was used as the filler. In Tables 1 and 2 below, “Evolue SP2020” corresponds to the thermoplastic resin A, “EXFOR® (registered trademark)” corresponds to the PE-Si block copolymer, and “SX-350H” Corresponds to filler A.

  In the liquid repellent film of Example 1, when viewed from the thickness direction of the liquid repellent layer, the area of the liquid repellent layer is M1, and the area of the liquid repellent layer where the filler exists is M2, M2 / M1 Is as shown in Table 1 below. Similarly, the thermoplastic resin with respect to the thickness T1 of the flat part of the liquid repellent layer, the average particle diameters T2 and T2 / T1 of the filler, and the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer The ratio of mass γ (γ / (α + γ)) is as shown in Table 1 below. The area M1 is a visual field range that can be observed with a microscope ("VHX-1000" manufactured by Keyence Corporation), and the area M2 is detected when the luminance of the microscope is set to 0 to 130 in the visual field range. The area occupied by possible fillers.

(Example 2)
A liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.27.

(Example 3)
A liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.5.

Example 4
A liquid repellent film was formed in the same manner as in Example 1 except that “MX-180TA” manufactured by Soken Chemical Co., Ltd. was used as the filler, and the amount of the filler was changed so that M2 / M1 was 0.5. In Table 1 below, “MX-180TA” corresponds to filler B.

(Example 5)
Using “M-5000” manufactured by Negami Kogyo Co., Ltd. as the filler, forming a liquid repellent layer so that the thickness T1 is 10 μm, and changing the amount of filler so that M2 / M1 is 0.15 Except for the above, a liquid repellent film was formed in the same manner as in Example 1. In Table 1 below, “M-5000” corresponds to filler C.

(Example 6)
A liquid repellent film was formed in the same manner as in Example 1 except that “MX-80H3wT” manufactured by Soken Chemical Co., Ltd. was used as the filler, and the amount of the filler was changed so that M2 / M1 was 0.27. In Table 1 below, “MX-80H3wT” corresponds to filler D.

(Example 7)
Using “GR-80W” manufactured by Negami Kogyo Co., Ltd. as a filler, forming a liquid repellent layer so that the thickness T1 is 5 μm, and changing the amount of filler so that M2 / M1 is 0.27 Except for the above, a liquid repellent film was formed in the same manner as in Example 1. In Table 1 below, “GR-80W” corresponds to filler E.

(Example 8)
The ratio (γ / (α + γ)) of the thermoplastic resin mass γ to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer is 60%, and M2 / M1 is 0.27. A liquid repellent film was formed in the same manner as in Example 1 except that the amount of the filler was changed.

Example 9
The ratio (γ / (α + γ)) of the thermoplastic resin to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer is 99%, and M2 / M1 is 0.27. A liquid repellent film was formed in the same manner as in Example 1 except that the amount of the filler was changed.

(Example 10)
The ratio (γ / (α + γ)) of the thermoplastic resin mass γ to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer is 90%, and M2 / M1 is 0.27. A liquid repellent film was formed in the same manner as in Example 1 except that the amount of the filler was changed.

(Example 11)
The ratio (γ / (α + γ)) of the thermoplastic resin mass γ to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer is 70%, and M2 / M1 is 0.27. A liquid repellent film was formed in the same manner as in Example 1 except that the amount of the filler was changed.

(Example 12)
“MX-500” manufactured by Soken Chemical Co., Ltd. was used as the filler, and the ratio of the mass γ of the thermoplastic resin to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer (γ / (α + γ) ) Was 90%, and a liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.27. In Table 1 below, “MX-500” corresponds to the filler F.

(Example 13)
“MX-2000” manufactured by Soken Chemical Co., Ltd. was used as the filler, and the ratio of the mass γ of the thermoplastic resin to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer (γ / (α + γ) ) Was 90%, and a liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.27. In Table 1 below, “MX-2000” corresponds to the filler G.

(Example 14)
Using “Trepearl (registered trademark) PES” manufactured by Toray Industries, Ltd. as a filler, the ratio of the mass γ of the thermoplastic resin to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer (γ / ( A liquid repellent film was formed in the same manner as in Example 1 except that α + γ)) was 90% and the amount of filler was changed so that M2 / M1 was 0.27. In Table 1 below, “Trepearl (registered trademark) PES” corresponds to the filler H.

(Example 15)
A liquid repellent film was formed in the same manner as in Example 14 except that “F-744NP” manufactured by Prime Polymer Co., Ltd. was used as the thermoplastic resin contained in the adhesive layer and the liquid repellent layer. In Table 1 below, “F-744NP” corresponds to the thermoplastic resin B, and “Trepearl (registered trademark) PES” corresponds to the filler H.

(Comparative Example 1)
A liquid repellent film was formed in the same manner as in Example 1 except that no filler was added to the liquid repellent layer.

(Comparative Example 2)
A liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.005.

(Comparative Example 3)
A liquid repellent film was formed in the same manner as in Example 1 except that the amount of filler was changed so that M2 / M1 was 0.7.

<Evaluation method>
The liquid repellent films of Examples 1 to 15 and Comparative Examples 1 to 3 were tested and evaluated by the following methods.

<Liquid repellency test>
In each Example and each Comparative Example, the liquid repellent film was placed flat so that the liquid repellent layer in the liquid repellent film was the outermost surface. Next, 2 μl of water was dropped onto the liquid repellent film using a dropper. Next, the liquid repellent film was tilted until it was vertical and allowed to stand for 30 seconds. And the state of the water on a liquid repellent film was observed visually. Further, 2 μl of “Nisshin Salad Oil (hereinafter, simply referred to as oil)” manufactured by Nisshin Oillio Group Co., Ltd. was dropped on different liquid repellent films using a dropper. Next, the liquid repellent film was tilted until it was vertical and allowed to stand for 30 seconds. Then, the state of oil on the liquid repellent film was visually observed and evaluated. In each example and each comparative example, each of water and oil remained in the form of dots on the liquid repellent film, or all flowed.

<Residual liquidity test>
A pouch (liquid repellent bag) having a length of 14 cm and a width of 20 cm was produced from the liquid repellent film obtained in each of Examples and Comparative Examples. At this time, the liquid repellent layer constituted the inner surface of the pouch. The pouch was filled with 100 g of oil. Next, the corner of the pouch was cut by 3 cm to form a spout. Next, the pouch was tilted 90 ° and held for 30 seconds. And the total amount of the oil discharged | emitted from the pouch was weighed, and the ratio (residual liquid ratio) of the oil which remained in the pouch was evaluated. The residual liquid rate (%) is expressed by (100−discharged amount).

The evaluation results of the residual liquid test for Examples 1 to 15 and Comparative Examples 1 to 3 were determined according to the following criteria A to D, and are shown in Tables 1 and 2 below. In this residual liquid property test, if the evaluation results were A to C, it was determined that the liquid repellent bag formed using the liquid repellent film had good adhesion prevention properties.
A: Residual liquid ratio is less than 1% B: Residual liquid ratio is 1% or more and less than 3% C: Residual liquid ratio is 3% or more and less than 5% D: Residual liquid ratio is 5% or more

<Film forming test>
About the liquid-repellent film obtained in each of each Example and each comparative example, the presence or absence of thickness spots and pulsations at the ends was visually evaluated. The evaluation results of the film-formability tests for Examples 1 to 15 and Comparative Examples 1 to 3 were determined according to the following criteria A to C, and are shown in Table 1 and Table 2 below. In this film-forming test, if the evaluation results were A and B, it was determined that the liquid-repellent film was formed with good film-forming properties.
A: Thickness unevenness and pulsation at the end are not confirmed. B: Thickness unevenness and pulsation at the end are not confirmed, but aggregates of liquid repellent resin are confirmed at a practical level. Pulsation is confirmed

  As shown in Tables 1 and 2 above, in each of Examples 1 to 15, the evaluation result of residual liquid property was C or more, and the evaluation result of film forming property was B or more. On the other hand, in Comparative Examples 1 and 2, although the film forming property evaluation result was A, the residual liquid property evaluation result was D. From these results, it is presumed that when the liquid repellent layer does not contain a filler, or when the amount of filler contained in the liquid repellent layer is small, sufficient residual liquid properties could not be exhibited. This is presumably because the surface of the lyophobic layer is not provided with uneven portions due to the filler, or the region where the uneven portions (particularly, convex portions) are formed is extremely small. Thus, it is presumed that the part where the liquid repellent layer facing each other and the other part are blocked by the liquid could not be sufficiently reduced. In Comparative Example 3, the evaluation result of the residual liquid property was B, but the evaluation result of the film forming property was C. From this result, in Comparative Example 3, the liquid repellent layer contained a large amount of filler, and the resin part containing the thermoplastic resin and the liquid repellent resin was difficult to spread on the adhesive layer. It is inferred that it was C. On the other hand, in Comparative Example 3, since the uneven portion caused by a large amount of filler was formed well on the surface of the liquid repellent film, it is presumed that the evaluation result of the residual liquid property was B.

  In Examples 1 to 7, the residual liquid evaluation result is C. In Examples 8 to 15, the residual liquid evaluation result is B or more. From this result, the ratio (γ / (α + γ)) of the thermoplastic resin mass γ to the total mass (α + γ) of the liquid repellent resin and the thermoplastic resin in the liquid repellent layer is set to 60% or more and 99% or less. Thus, it is assumed that the residual ratio of the liquid in the bag can be further reduced. In Example 8 where the ratio (γ / (α + γ)) is 60%, unlike in Examples 9 to 15, the evaluation result of film forming property is B. For this reason, in order to reduce the remaining rate while maintaining the film forming property, it is presumed that the above ratio should be set to 70% or more and 99% or less.

  In Examples 12 to 15, the residual liquid evaluation result is A. Here, the ratio (γ / (α + γ)) in Examples 12 to 15 is the same as that in Example 10. From these results, it is presumed that the residual ratio of the liquid in the bag can be further reduced by setting the average particle size of the filler to 5 μm or more and 60 μm or less.

  DESCRIPTION OF SYMBOLS 1 ... Liquid repellent bag, 1a ... Inner surface, 2 ... Main body part, 3 ... Discharge part, 4 ... Heat sealing part, 10 ... Liquid repellent film, 11 ... Base material, 12 ... Adhesive layer, 13 ... Liquid repellent layer, 13a Concavo-convex part, 14 resin part, 15 filler, L, liquid, M1, M2 area, T1 thickness, T2 average particle diameter.

Claims (8)

A laminated film having a base material and a liquid repellent layer that are sequentially laminated is formed in a bag shape, and is a liquid repellent bag having an inner surface constituted by the liquid repellent layer,
The liquid repellent layer includes a thermoplastic resin, a liquid repellent resin, and a filler,
The surface of the liquid repellent layer is provided with an uneven portion due to the filler,
When viewed from the thickness direction of the liquid repellent layer, when the area of the liquid repellent layer is M1, and the area of the liquid repellent layer where the filler is present is M2, M2 / M1 is 0.01. Is 0.5 or less,
Liquid repellent bag.   The thickness of the flat part in which the said filler does not exist in the said liquid repellent layer is set to T1, and T2 / T1 is 0.05 or more and 15 or less when the average particle diameter of the said filler is set to T2. Liquid repellent bag.   3. The liquid repellent bag according to claim 1, wherein in the liquid repellent layer, a ratio of the thermoplastic resin to a total mass of the liquid repellent resin and the thermoplastic resin is 70% or more and 99% or less.   The liquid repellent bag according to any one of claims 1 to 3, wherein the filler has an average particle size of 5 µm or more and 60 µm or less.   The liquid-repellent bag according to any one of claims 1 to 4, wherein the liquid-repellent resin includes a silylated polyolefin.   The liquid-repellent bag according to claim 1, wherein the laminated film further includes an adhesive layer sandwiched between the base material and the liquid-repellent layer. A main body for containing contents,
Projecting from a part of the main body, and a discharge part communicating with the main body;
The liquid-repellent bag according to any one of claims 1 to 6, further comprising: a heat-sealing part that seals the main body part and the discharge part, wherein the liquid-repellent layer is heat-sealed. A substrate;
A liquid repellent layer provided on the substrate, comprising a thermoplastic resin, a liquid repellent resin, and a filler;
With
On the surface of the liquid repellent layer, an uneven portion due to the filler is provided,
When viewed from the thickness direction of the liquid repellent layer, when the area of the liquid repellent layer is M1 and the area of the liquid repellent layer where the filler is present is M2, M2 / M1 is 0.01. Is 0.5 or less,
Liquid repellent film.