WO2021234914A1 - Film for packaging solid product, and packaging bag - Google Patents

Film for packaging solid product, and packaging bag Download PDF

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Publication number
WO2021234914A1
WO2021234914A1 PCT/JP2020/020135 JP2020020135W WO2021234914A1 WO 2021234914 A1 WO2021234914 A1 WO 2021234914A1 JP 2020020135 W JP2020020135 W JP 2020020135W WO 2021234914 A1 WO2021234914 A1 WO 2021234914A1
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WIPO (PCT)
Prior art keywords
solid product
film
solid
packaging
rough surface
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PCT/JP2020/020135
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French (fr)
Japanese (ja)
Inventor
浩介 植田
諭男 木村
正毅 青谷
隆司 大貫
卓生 村上
沙耶 杉岡
洋介 阿久津
隆幸 石原
力 岩崎
啓佑 丹生
晋也 清藤
Original Assignee
東洋製罐グループホールディングス株式会社
東洋製罐株式会社
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Application filed by 東洋製罐グループホールディングス株式会社, 東洋製罐株式会社 filed Critical 東洋製罐グループホールディングス株式会社
Priority to PCT/JP2020/020135 priority Critical patent/WO2021234914A1/en
Publication of WO2021234914A1 publication Critical patent/WO2021234914A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers

Definitions

  • the present invention relates to a solid product packaging film used for packaging a solid product composed of a large number of granules or lumps, and a packaging bag containing the solid product.
  • plastic In general, plastic is easier to mold than glass, metal, etc., and can be easily molded into various shapes, so it is used for various purposes.
  • the field of packaging containers such as bag-shaped containers (pouches) and bottles is a typical field of plastic applications.
  • Patent Document 1 discloses a packaging container in which a non-woven fabric is laminated on the surface.
  • This container is used to store water-containing viscous substances such as miso and butter, and when the contents come into contact with the inner surface of the container (non-woven film), the water content of the contents permeates into the non-woven film due to capillarity.
  • a water film in which gas is mixed is formed, and the oil repellency exhibited by this water film allows the contents to be quickly discharged.
  • Patent Document 2 discloses a heat-sealing film in which an inorganic binder layer and a water-repellent coating layer are formed in this order on a heat-sealing resin layer.
  • spherical particles having an average particle diameter of 10 ⁇ m to 50 ⁇ m are exposed on the surface of the heat-sealing resin layer to form surface irregularities, and the inorganic binder layer formed on the surface irregularities is formed.
  • oxide fine particles having an average primary particle diameter of 5 nm to 1 nm are dispersed, and a water-repellent coat layer is formed by subjecting the surface of such an inorganic binder layer to a water-repellent treatment.
  • This film is applied to packaging materials containing liquids such as yogurt, jelly, pudding, syrup, porridge, soup, semi-solid or gel-like substances. That is, the water-repellent coat layer formed on the surface of this film is formed by a silane coupling agent having a hydrophobic functional group such as a methyl group, and spherical particles are formed on the surface of the water-repellent coat layer.
  • the fractal-like uneven surface is formed by the fine particle dispersion, and the water repellency of the water-repellent coat layer and the water repellency of the fractal-like unevenness exhibit excellent take-out property for the substance to be packaged.
  • the plastic molded body disclosed in Patent Document 3 has a reentrant structure surface formed by an array of enlarged pillars, and the reentrant structure surface has a liquid-repellent surface in which fluorine atoms are distributed. It has become.
  • This plastic molding is particularly applied to containers that contain viscous fluids such as curry.
  • Patent Documents 1 to 3 an uneven structure is formed on a surface in contact with the contents, and further, a fluorine compound, a silicone compound, or the like is used to chemically impart liquid repellency.
  • each solid product is an aggregate of a large number of granules or lumps that behave independently, and as compared with the above-mentioned viscous fluid, it can be rapidly discharged even in a usual known packaging container. This is because it can be said that there is no request for improving the dischargeability or reducing the residual amount of adhesion in the container.
  • wet solid products are bundled with other products and stored, and if they are partitioned and stored by a member such as a film, the wet solid product will adhere to the member. There is also a problem. However, since the amount of adhesion is not so large and it can be taken out by scraping with chopsticks or the like, its dischargeability has hardly been examined.
  • the present inventors have increased the amount of adhesion when the surface of the container in which the solid products come into contact is a rough surface having an uneven structure. We have found that it can be reduced, and have completed the present invention.
  • a solid product packaging film used for packaging a solid product composed of a large number of granules or lumps that behave independently of each other is provided.
  • a film for packaging a solid product characterized in that the surface with which the solid product comes into contact is a rough surface having an uneven structure.
  • the arithmetic average roughness Ra of the rough surface is larger than 3 ⁇ m.
  • the rough surface is formed of a thermoplastic resin.
  • the convex portions are arranged in a grid pattern, a parallel linear pattern, or a dot pattern.
  • a packaging bag obtained by making the above film into a bag and containing the solid product.
  • the solid product is food.
  • the 50% diameter L 50 of the side cross-sectional major axis L of the solid product measured by placing the granules or lumps constituting the solid product on a flat surface so as not to overlap each other is the following formula (1).
  • D AV represents the arithmetic mean value of the distance D between a half height between the convex portion that is closest in the concavo-convex structure, Satisfy the conditions represented by.
  • the side cross-sectional major axis 50% diameter L 50 of the solid product is within the range of 30 mm or less.
  • the granules or lumps constituting the solid product are present in a wet state, and the liquid derived from the solid product is present in the recesses on the rough surface.
  • the liquid contains oil.
  • the packaging film of the present invention can effectively suppress adhesion to the film surface even when a solid product having a wet surface, for example, a granular product impregnated with a seasoning liquid or the like comes into contact with the film. That is, it can be easily wiped off from the film surface. Therefore, this packaging film is extremely useful as a packaging bag (pouch) filled with solid products, particularly edible solid products.
  • the schematic side sectional view which shows the form of the rough surface of the concavo-convex structure which the packaging film of this invention has, together with the solid product which comes into contact with this.
  • the figure for demonstrating the method of forming a rough surface The figure which photographed the appearance of the film after the adhesion evaluation about the Example and the comparative example of this invention.
  • the solid product is composed of a large number of particles or lumps (hereinafter, may be simply referred to as solid particles) that behave independently of each other, but can be sold in a bag. be. That is, natto, cooked rice, rice, etc. are not sold in bags because they are too sticky even if they are solid products. This is because it cannot be taken out of the bag.
  • the solid particles described above are each impregnated with a liquid and have a wet surface. That is, some gels and emulsions (for example, agar, tofu, yogurt, mayonnaise) have a wet surface, but their shapes are not fixed, and when a certain amount of stress is applied, the shapes change. It is not a solid product because it changes, and it is not a solid product in the present invention. Further, a paste in which solid particles are dispersed in a liquid is not a solid product in the present invention because the particles do not behave independently and the particles flow together. The present invention does not apply. Further, although the present invention can be applied to non-wet solid products, as described above, such solid products do not adhere to the film surface, and therefore, it is meaningful to apply the present invention. No.
  • solid particles that behave independently are impregnated with a liquid, and the liquid is present on the surface and is in a wet state.
  • Solid particles may originally contain many liquid components, such as flakes, and these liquid components may be distributed on the surface.
  • the degree of wetting of this surface (corresponding to the amount of liquid present on the surface) cannot be unequivocally defined, but if it is present in large quantities, this liquid is present on the surface of adjacent granules or lumps.
  • the solid particles flow together with the liquid as in the case of a paste-like substance. Therefore, the present invention cannot be applied. Therefore, the amount of liquid present on the surface of the solid particles needs to be a certain amount.
  • Such a liquid amount cannot be strictly specified because there are many types of liquids to be impregnated, but when impregnated with water, the water activity is about 0.30 to 0.99, and when impregnated with only oil.
  • the lipid content of the solid product is about 5 to 50% by mass.
  • the water activity is a parameter indicating free water contained in the food, and is a value obtained by dividing the water vapor pressure of the food by the water vapor pressure of pure water under the same conditions.
  • the solid product of the present invention a large number of the above-mentioned solid particles 7 are contained in a container, and an excessively large solid product hardly causes a problem of adhering to the film surface due to its weight. Therefore, the solid particles are placed on a plane so that the granules or the agglomerates do not overlap each other, and the diameter L of the side cross section is calculated, and the diameter L is 50% (that is, the median diameter) in the integrated distribution.
  • L 50 this value is preferably 30 mm or less.
  • the solid product to which the present invention is applied is not limited to this, but wet salmon flakes, soboro, paste, kelp, tarako, mentaiko, pickled plum, takana, tuna mayo, eel, etc.
  • Typical examples are various types of furikake, shigureni, kelp, pickled ginger, gari, pickled Fukujin, pickled shiba, and tsukudani.
  • a concavo-convex structure having a large number of convex portions (projections) 3 is formed on the surface 1 of the film of the present invention in contact with the solid product, and the space between the convex portions 3 is formed. Is a concave portion 5, whereby the surface 1 in contact with the solid product is a rough surface.
  • a large number of solid particles 7 are in contact with the surface (rough surface) 1 in contact with such a solid product, and the liquid 9 is distributed on the surface of the solid particles 7, respectively. ..
  • the convex portion 3 is formed and the surface 1 is a rough surface as described above, and such a rough surface satisfies the following condition (1).
  • a rough surface that satisfies such conditions is formed, adhesion of the solid product (solid particles 7) to the surface 1 (rough surface) is more effectively suppressed.
  • L 50 is a 50% ⁇ Chi median diameter in cumulative distribution side sectional diameter L measured on the solid particles 7
  • D AV is convex portion that is closest in the uneven structure It is an arithmetic mean value of the interval D at 1/2 height (1 / 2h) of 3.
  • conditional expression (1) has been found as a result of many experiments, but when such a conditional expression (1) is satisfied, an air layer is formed in the concave portion 5 between the convex portions 3.
  • the solid particles 7 are present on the film surface 1 (rough surface) via such an air layer.
  • the solid particles 7 due to the liquid repellency of the air layer, the solid particles 7 do not adhere to the film surface 1 and easily flow on the film surface 1, for example, in a bag formed of this film, the solid particles (solid particles). ) Is considered to be effectively suppressed from remaining in the bag.
  • the height h of the convex portion 3 is not particularly limited, but if this height h is too low, the concave portion 5 is filled with the liquid 9 when a small amount of the liquid 9 enters the concave portion 5. This will impair the formation of the air layer. Therefore, the arithmetic average roughness Ra of the convex portion 3 is preferably 3 ⁇ m or more, more preferably larger than 15 ⁇ m, and further preferably 30 ⁇ m or more. Further, in order to confirm that the recess 5 is not filled with the liquid 9 and the air layer is formed, the maximum height at the portion where the solid component of the solid product adheres on the surface once in contact with the solid product. Rz may be measured, and the value is preferably 4 ⁇ m or more, more preferably 10 ⁇ m or more, more preferably 60 ⁇ m or more, still more preferably 100 ⁇ m or more.
  • the convex portion 3 as described above may be formed in various patterns.
  • FIG. 3 shows such an arrangement pattern of the convex portions 3.
  • FIGS. 3A and 3B are patterns in which the convex portions 3 are arranged in a grid pattern by intersecting the convex portions 3 extending in parallel with each other.
  • the convex portions 3 are arranged in a grid pattern.
  • the convex portions 3 extending in parallel are orthogonal to each other to form a rectangular or square grid.
  • the convex portions 3 extending in parallel are inclined and intersect with each other to form a parallelogram-shaped or rhombic-shaped lattice.
  • the shape of such a grid is not limited to such a rectangle. For example, it may have a hexagonal shape in which the intersections of the convex portions 3 are formed thickly and the intersections are formed in a round shape.
  • the pattern of FIG. 3C is a pattern extending linearly so that the convex portions 3 do not intersect, and in such a pattern extending linearly, the shape of the line is limited to a straight line. It may be a zigzag shape in which a straight line is bent in the middle, or the line may be composed of a curved line.
  • the pattern of FIG. 3D is a pattern in which the convex portions 3 are randomly arranged in a dot shape. The shape of such dots is not limited to a circle, and may be, for example, a rectangle.
  • the form of the convex portion 3 is shown by a rectangular cross section in the example of FIG. 1, but the shape is not limited to this. Examples of such other shapes are shown in FIG.
  • a shape in which an enlarged head portion 3a is formed at the upper end portion of the convex portion 3, a cone shape, a dome shape, a spherical shape, or the like can be formed, and the shape is irregular. It may be present, or it may have a double-layered concavo-convex structure such that the surface of the convex portion 3 is further concavo-convex as typified by a fractal structure.
  • the convex portion 3 having the smallest interval is identified by microscopic observation, and the interval D at at least 10 places or more is measured at 1 / 2h by the method described in Examples described later. Then, the arithmetic mean value DAV is calculated.
  • the condition that satisfies the above formula (1) it is preferable arithmetic mean value D AV interval D between the projections 3 of the is 70 ⁇ m or more. That is, if the interval DAV is too small, the liquid 9 existing on the surface of the solid particles 7 permeates into the concave portion 5 between the convex portions 3 due to the capillary phenomenon, and the concave portion 5 is filled with the liquid 9. An air layer is not formed under the solid particles 7, and the solid particles 7 are difficult to peel off from the surface 1.
  • the concave portion 5 between the convex portions 3 When the concave portion 5 between the convex portions 3 is filled with the liquid 7, the scattering of light by the convex portion 3 is alleviated, and even if the film is opaque before coming into contact with the solid particles, it becomes transparent. ..
  • the convex portion 3 since the convex portion 3 is formed so as to satisfy the above-mentioned formula (1), the concave portion 5 between the convex portions 3 is formed even when the solid product (solid particles) is in contact with the surface 1. An air layer is secured in the air layer, and therefore, due to light scattering, the transparency is as high as before the solid product comes into contact with the solid product.
  • the film member in the present invention may be opaque, and by designing the uneven shape in advance in consideration of the wavelength of visible light in order to ensure the transparency of the film, the adhesion of solid products is suppressed and the film is transparent. It is also possible to achieve both sex.
  • the transparency here means that the shape and color of the solid product can be visually recognized through the film, and the haze value is 70% or less, and 50% or less when it is particularly excellent.
  • the film having the surface 1 in contact with the solid product having the convex portion 3 as described above is any plastic as long as it can be molded into a predetermined shape, for example, a thermoplastic resin, a thermosetting resin, or a photocurable resin. It may be formed of a resin or the like, and an appropriate resin may be selected according to the use of the molded product, and a multi-layer structure is also possible. Further, in terms of moldability, a thermoplastic resin is preferable.
  • olefin resins typified by polystyrene, polyethylene, polypropylene, ethylene or a copolymer of propylene and other olefins, a copolymer of ethylene and vinyl alcohol, polyethylene terephthalate (PET), etc.
  • PET polyethylene terephthalate
  • Typical examples are polymers such as polyethylene isophthalate and polyethylene naphthalate.
  • the concave-convex structure formed by the convex portion 3 described above can be created by various methods, and for example, a transfer method, a sandblast method, or a method using spraying of a resin fiber can be adopted.
  • a transfer method for example, a transfer method, a sandblast method, or a method using spraying of a resin fiber can be adopted.
  • the method using resin fibers or non-woven fabric has problems such as generation of fiber waste
  • the sandblasting method has problems such as contamination of the media (projection material, abrasive) used, so that it can be formed by the transfer method. desirable.
  • the molten plastic film from the extruder 41 is extruded onto a roll 43 having an uneven structure, and the surface is uneven by cooling and solidifying while pressurizing with the nip roll 45.
  • a film 47 to which the structure has been transferred is obtained.
  • a plastic film formed by injection molding, extrusion molding, or the like is preheated by a heating method known per se, and cooled while being pressurized between the roll 43 and the nip roll 45 having the uneven structure. By doing so, a film 47 having an uneven structure transferred to the surface is manufactured. Further, in FIG.
  • the plastic film is cooled while being pressed by a plurality of rolls 65 whose temperature is controlled between the belt 61 having the uneven structure on the surface and the nip belt 63.
  • a means of pressing with a mold to which the uneven structure is transferred using a hot press machine to cool the surface can also be adopted.
  • the roll 43, the mold on which the uneven structure is transferred, and the belt 61 are transferred into the uneven shape by a known dry etching method, wet etching method, photo etching method, sandblasting method, laser engraving method, cutting engraving method, or the like. It can be manufactured by forming a shape for the surface on the surface.
  • the film having the uneven structure thus obtained is formed into a container in the form of a tube, a cup, a tray, etc., or is particularly wet, such as an adhesion prevention film in a tray or a cup container, a partition member typified by a balun, or the like.
  • a container in the form of a tube, a cup, a tray, etc.
  • a partition member typified by a balun, or the like.
  • it can be applied to a member with which a solid product comes into contact, it is generally most preferably used in a bag-like form (so-called pouch) by a known means such as a heat seal.
  • the film member of the present invention can be applied to various solid products, but in particular, solid products whose surface is in a wet state due to impregnation with a liquid, for example, a viscous liquid in which saccharides are dissolved or dispersed, or a hydrous alcohol such as mirin.
  • a liquid for example, a viscous liquid in which saccharides are dissolved or dispersed, or a hydrous alcohol such as mirin.
  • a liquid for example, a viscous liquid in which saccharides are dissolved or dispersed, or a hydrous alcohol such as mirin.
  • the present invention is most effective, and especially seasoning to solid particles. It is best used as a bag-shaped container for storing foods impregnated with liquid or the like.
  • Adhesion evaluation was carried out under the following conditions in order to evaluate the adhesion amount of solid products.
  • To fix the sample film attach it to white drawing paper using double-sided tape and cut it to a size of 5 x 2 cm to prepare a sample mount.
  • 50 g of the solid product is put into a disposable cup made by AS ONE / capacity of 2000 ml, and a sample mount is embedded between the solid product and the disposable cup so that the rough surface is in contact with the solid product. Then, shake the disposable cup left and right for 20 seconds, and gently collect the sample using tweezers. At the time of collection, the sample is tilted 90 ° so as not to give impact or vibration, and the solid product is dropped from the sample mount by its own weight.
  • the roughness curve is acquired and Rsm is measured without using the cutoff value.
  • a temporary cutoff value was selected from the Rsm value.
  • the cutoff value is 0.08 mm.
  • the cutoff value is 0.25 mm.
  • the cutoff value is 0.8 mm.
  • the cutoff value is 2.5 mm.
  • the cutoff value is 8 mm.
  • Ra was calculated from the acquired roughness curve in the direction in which DAV was measured. Ra was calculated from at least two or more roughness curves, and the arithmetic mean value was taken as Ra of the sample. Incidentally, D AV as well as the height H is the measurement impossible in the case of less than 3 [mu] m.
  • the solid product was taken out on a plate, and the optical image of the particles taken with a camera or a microscope was image-analyzed to measure the cross-sectional diameter immediately.
  • the board was a single color with no stains or scratches, and a white polypropylene tray was used so that the hue of the solid product would be different.
  • the Xacti DMX-HD1010 manufactured by Sanyo Electric Co., Ltd. was used for taking the particle optical image, and the automatic area (particle count) measuring function mounted on the digital microscope VHX-6000 manufactured by Keyence Co., Ltd. was used for the image analysis.
  • the particles were moved using tweezers or the like to the extent that the particles did not collapse or deform.
  • the magnification of the camera was determined by the size of the particles, 50 to 200 particles were captured on the screen, and the ratio of the particles in the screen was about 20%.
  • the plate may be tilted by about 10 degrees or the static electricity of the plate may be removed by using an ionizer or the like.
  • the optical image of the captured particles was binarized, the contour of the particles was extracted, and the minimum diameter of the contour was measured.
  • the minimum diameter was set when the contour of the particle was sandwiched between two parallel lines so that the distance between the two parallel lines became the minimum.
  • the binarization was performed using the parameters of lightness difference, hue difference, and saturation difference.
  • the minimum diameter of the particles from the measured results was calculated a 50% diameter in cumulative distribution of the solid product, i.e. a median diameter L 50.
  • the liquid present in the recess was confirmed using the sample subjected to the discharge test, the sample before the discharge test, and the solid product.
  • FT-Raman DXR Raman Microscope manufactured by Thermo
  • the measurement point was set in the sample recess where solid solid products did not adhere.
  • the output was 10 mW and the exposure time was 10 seconds.
  • the spectrum was acquired under the condition of 20 times. Further, in order to obtain the spectrum of the liquid derived from the solid product, the target solid product was pinched with tweezers and rubbed against the slide glass to attach the liquid derived from the solid product.
  • the spectra of the sample immediately after the discharge test, the sample before the discharge test, and the liquid derived from the solid product are compared, and the sample spectra of the sample after the emission evaluation and the liquid derived from the solid product, which are not present in the sample spectrum before the discharge test, are shown. Whether or not the liquid derived from the solid product was present in the recess was determined based on the presence or absence of the existing peak. Those in which this peak was confirmed are indicated by ⁇ , and those in which this peak could not be confirmed are indicated by ⁇ .
  • Example 1 A PE (polyethylene) resin was extruded onto a chill roll having an uneven shape to prepare an embossed film having recesses formed in a square shape of 50 ⁇ m square.
  • the embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 2 A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the recesses were formed of an ellipse (turtle shell shape) having a major axis of 1.2 mm and a minor axis of 0.95 mm.
  • the embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 3 A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the convex portions were formed in a diamond shape with a major axis of 0.75 mm and a minor axis of 0.55 mm.
  • the embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG. Further, a photograph of the pouch after the emission evaluation is shown in FIG.
  • Example 4 A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the recesses were formed in a diamond shape with a major axis of 4 mm and a minor axis of 2.2 mm.
  • the embossed film produced was subjected to the above-mentioned various evaluation measurements using a wet beef sprinkle as a solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 5 A transfer plate with irregularities given by laser processing is prepared and hot-pressed against a PE film (manufactured by Tamapoli, V-1) to create a line and space with a convex portion width of 165 ⁇ m and a concave portion width of 135 ⁇ m.
  • An uneven film made of PE was produced.
  • the above-mentioned various evaluation measurements were performed on the produced uneven film using a wet beef sprinkle as a solid product. The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • a transfer plate with irregularities is prepared by the photo edging method, and by hot pressing against PE (manufactured by Tamapoli, V-1), it is made of PE with a diameter of 200 ⁇ m, a height of 50 ⁇ m, and a pitch of 270 ⁇ m.
  • An uneven film was produced.
  • the above-mentioned various evaluation measurements were performed on the produced uneven film using a wet beef sprinkle as a solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 7 a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 8 a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 9 a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 10 a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 11 a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 12 a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 13 a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 14 a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 15 a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 16 a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluations and confirmations were carried out.
  • Comparative Example 2 In Comparative Example 1, the above-mentioned various evaluations and measurements were carried out in the same manner except that a wet furikake was used for the solid product. The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Comparative Example 3 In Comparative Example 1, the above-mentioned various evaluations and measurements were carried out in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product. The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 4 ⁇ Comparative Example 4>
  • various evaluations and measurements described above were carried out in the same manner except that a wet furikake was used for the solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • Example 4 the above-mentioned various evaluation measurements were carried out in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product.
  • the morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
  • the amount of wet solid products attached can be reduced by the present invention. Further, as can be understood from FIG. 7 showing a photograph of the appearance of the pouch after the discharge evaluation, it can be seen that the pouch morphology also suppresses adhesion and enhances the discharge property.

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Abstract

A film for packaging a solid product, the film being used in packaging a solid product formed from numerous granules or aggregates that behave independently from each other, wherein the film is characterized in that the surface with which the solid product comes into contact is a rough surface 1 having a relief structure.

Description

固形製品包装用フィルム及び包装袋Solid product packaging film and packaging bag
　本発明は、多数の粒状物もしくは塊状物からなる固形製品の包装に使用される固形製品包装用フィルム及び該固形製品が収容された包装袋に関する。 The present invention relates to a solid product packaging film used for packaging a solid product composed of a large number of granules or lumps, and a packaging bag containing the solid product.
　一般にプラスチックは、ガラスや金属等に比して成形が容易であり、種々の形状に容易に成形できるため、種々の用途に使用されている。その中でも、袋状容器（パウチ）やボトルなどの包装容器の分野は、プラスチックの用途の代表的な分野である。 In general, plastic is easier to mold than glass, metal, etc., and can be easily molded into various shapes, so it is used for various purposes. Among them, the field of packaging containers such as bag-shaped containers (pouches) and bottles is a typical field of plastic applications.
　包装容器の分野においては、内容物の排出性が要求され、特に粘稠なペースト状物については、容器の内面に付着残存し易く、また速やかな排出が困難であるため、これまでに多くの検討がなされている。 In the field of packaging containers, the dischargeability of the contents is required, and especially for viscous paste-like substances, it is easy for them to adhere and remain on the inner surface of the container, and it is difficult to discharge them promptly. It is being considered.
　例えば、特許文献１には、表面に不織布が積層された包装容器が開示されている。この容器は、味噌やバターなどの含水粘性物の収容に使用されるものであり、内容物との容器内面（不織布）との接触により、毛管現象により内容物の水分が不織布内に浸透し、気体が混在した水膜が形成され、この水膜が示す撥油性により内容物を速やかに排出することができるというものである。 For example, Patent Document 1 discloses a packaging container in which a non-woven fabric is laminated on the surface. This container is used to store water-containing viscous substances such as miso and butter, and when the contents come into contact with the inner surface of the container (non-woven film), the water content of the contents permeates into the non-woven film due to capillarity. A water film in which gas is mixed is formed, and the oil repellency exhibited by this water film allows the contents to be quickly discharged.
　また、特許文献２には、熱シール樹脂層の上に、無機バインダー層及び撥水コート層が、この順に形成された熱シール性フィルムが開示されている。この熱シール性フィルムでは、熱シール樹脂層の表面に平均粒子径が１０μｍ～５０μｍの球状粒子が露出して表面凹凸を形成しており、この表面凹凸の上に形成されている無機バインダー層には、平均一次粒子径が５ｎｍ～１ｎｍの酸化物微粒子が分散されており、このような無機バインダー層表面を撥水処理することにより、撥水コート層が形成されている。このフィルムは、ヨーグルト、ゼリー、プリン、シロップ、御粥、スープなどの液体、半固体或いはゲル状物質などを収容する包装材に適用される。即ち、このフィルム表面に形成されている撥水コート層は、メチル基などの疎水性官能基を有するシランカップリング剤により形成されるのであるが、この撥水コート層の表面には、球形粒子と微粒子分散とによりフラクタル状の凹凸表面が形成されており、撥水コート層による撥水性とフラクタル状凹凸による撥水性とにより、包装される物質に対して優れた取出し性が発現されている。 Further, Patent Document 2 discloses a heat-sealing film in which an inorganic binder layer and a water-repellent coating layer are formed in this order on a heat-sealing resin layer. In this heat-sealing film, spherical particles having an average particle diameter of 10 μm to 50 μm are exposed on the surface of the heat-sealing resin layer to form surface irregularities, and the inorganic binder layer formed on the surface irregularities is formed. In the above, oxide fine particles having an average primary particle diameter of 5 nm to 1 nm are dispersed, and a water-repellent coat layer is formed by subjecting the surface of such an inorganic binder layer to a water-repellent treatment. This film is applied to packaging materials containing liquids such as yogurt, jelly, pudding, syrup, porridge, soup, semi-solid or gel-like substances. That is, the water-repellent coat layer formed on the surface of this film is formed by a silane coupling agent having a hydrophobic functional group such as a methyl group, and spherical particles are formed on the surface of the water-repellent coat layer. The fractal-like uneven surface is formed by the fine particle dispersion, and the water repellency of the water-repellent coat layer and the water repellency of the fractal-like unevenness exhibit excellent take-out property for the substance to be packaged.
　さらに、特許文献３に開示されているプラスチック成形体は、拡径したピラーの配列により形成されたリエントラント構造表面を有しており、このリエントラント構造表面はフッ素原子が分布して撥液性表面となっている。このプラスチック成形体は、特にカレーのような粘稠な流動体が収容される容器に適用される。 Further, the plastic molded body disclosed in Patent Document 3 has a reentrant structure surface formed by an array of enlarged pillars, and the reentrant structure surface has a liquid-repellent surface in which fluorine atoms are distributed. It has become. This plastic molding is particularly applied to containers that contain viscous fluids such as curry.
　このように、内容物が容器内に付着残存せず、その排出性を高める手段としては、数多くの提案がなされており、その例を挙げれば枚挙に暇がないが、その多くは、上記の特許文献１～３に開示されているように、内容物と接触する面に凹凸構造を形成し、さらには、フッ素化合物やシリコーン化合物などにより化学的に撥液性を付与するというものである。 As described above, many proposals have been made as a means for improving the dischargeability of the contents without remaining adhering to the container, and to give an example, there is no time to list them, but most of them are described above. As disclosed in Patent Documents 1 to 3, an uneven structure is formed on a surface in contact with the contents, and further, a fluorine compound, a silicone compound, or the like is used to chemically impart liquid repellency.
　ところで、上記のような内容物排出性は、全て粘稠な液体、ペースト、ゲル状物質などの流動体についてであり、固形製品についての検討はなされていない。固形製品は、それぞれ、独立して挙動する多数の粒状物もしくは塊状物の集合体であり、上記の粘性流体と比較すれば、通常の公知の包装容器でも速やかに排出させることができるため、その排出性を高めたり或いは容器内の付着残存量を低減させるなどの要望はないといってよいからである。 By the way, the above-mentioned content discharge properties are all related to fluids such as viscous liquids, pastes, and gel-like substances, and solid products have not been studied. Each solid product is an aggregate of a large number of granules or lumps that behave independently, and as compared with the above-mentioned viscous fluid, it can be rapidly discharged even in a usual known packaging container. This is because it can be said that there is no request for improving the dischargeability or reducing the residual amount of adhesion in the container.
　しかしながら、このような固形製品の中には、粒状物や塊状物に液体（例えば調味液）が含浸され、表面がウエットな状態となっているものがある。例えば、食品類では、通常のフリカケなどは乾燥粉末であり、ウエットではないが、最近市販されているフリカケの多くは、醤油、ミリン、ゴマ油、サラダ油等の調味液などにより味付けされている。また、つくだ煮、甘露煮などの煮つけ食品などは、かなりウエットである。このようなウエットな固形製品は、袋詰めして販売されているものが多いが、固形製品の表面に存在している液体のべた付きなどのため、袋から取り出したとき、その一部が袋内に付着残存するという問題がある。また、ウエットな固形製品が他の製品と同梱され収容されているものもあり、フィルムなどの部材により仕切られて収容されている場合は、その部材にウエットな固形製品が付着してしまうという問題もある。しかしながら、付着する量がさほど多くなく、また、箸などを用いての掻きだし等により取り出すこともできるため、その排出性についての検討はほとんどなされていない。 However, some of these solid products have a wet surface due to impregnation of a liquid (for example, a seasoning liquid) into granules or lumps. For example, in foods, ordinary frikake is a dry powder and is not wet, but most of the frikake on the market these days are seasoned with seasoning liquids such as soy sauce, mirin, sesame oil, and salad oil. In addition, boiled foods such as tsukudani and kanro-ni are quite wet. Many of these wet solid products are sold in bags, but due to the stickiness of the liquid present on the surface of the solid products, some of them are in the bag when taken out of the bag. There is a problem that it remains attached to the inside. In addition, some wet solid products are bundled with other products and stored, and if they are partitioned and stored by a member such as a film, the wet solid product will adhere to the member. There is also a problem. However, since the amount of adhesion is not so large and it can be taken out by scraping with chopsticks or the like, its dischargeability has hardly been examined.
特開２００２－１２０８６１号公報Japanese Unexamined Patent Publication No. 2002-120861 特開２０１４－６９５５７号公報Japanese Unexamined Patent Publication No. 2014-69557 特開２０１８－１７６７４３号公報Japanese Unexamined Patent Publication No. 2018-176743
　本発明の目的は、固形製品の包装に使用される包装用フィルムを提供することであり、この固形製品がウエットな状態にあってもフィルム面の固形製品の付着を有効に防止できる固形製品包装用フィルムを提供することである。
　また、本発明の他の目的は、上記の包装用フィルムを用いての製袋により形成され且つ固形製品が収容されている包装袋を提供することにある。 An object of the present invention is to provide a packaging film used for packaging a solid product, and the solid product packaging can effectively prevent the solid product from adhering to the film surface even when the solid product is in a wet state. Is to provide a film for use.
Another object of the present invention is to provide a packaging bag formed by bag making using the above-mentioned packaging film and containing a solid product.
　本発明者等は、ウエットな状態にある固形製品についての付着性について多くの実験を行った結果、容器の固形製品が接触する面を、凹凸構造を有する粗面とするときには、付着量を大きく低減させ得ることを見出し、本発明を完成させるに至った。 As a result of conducting many experiments on the adhesiveness of solid products in a wet state, the present inventors have increased the amount of adhesion when the surface of the container in which the solid products come into contact is a rough surface having an uneven structure. We have found that it can be reduced, and have completed the present invention.
　即ち、本発明によれば、互いに独立して挙動する多数の粒状物もしくは塊状物からなる固形製品の包装に使用される固形製品包装用フィルムにおいて、
　前記固形製品が接触する面が凹凸構造の粗面となっていることを特徴とする固形製品包装用フィルムが提供される。 That is, according to the present invention, in a solid product packaging film used for packaging a solid product composed of a large number of granules or lumps that behave independently of each other.
Provided is a film for packaging a solid product, characterized in that the surface with which the solid product comes into contact is a rough surface having an uneven structure.
　本発明の包装容器においては、次の態様が好適に採用される。
（Ａ）前記粗面の算術平均粗さＲａが３μｍより大きいこと。
（Ｂ）前記粗面は熱可塑性樹脂により形成されていること。
（Ｃ）前記凹凸構造において、前記凸部が格子状、平行な線状或いはドット状に配列されていること。 In the packaging container of the present invention, the following aspects are preferably adopted.
(A) The arithmetic average roughness Ra of the rough surface is larger than 3 μm.
(B) The rough surface is formed of a thermoplastic resin.
(C) In the uneven structure, the convex portions are arranged in a grid pattern, a parallel linear pattern, or a dot pattern.
　本発明によれば、また、上記のフィルムを製袋して得られ且つ前記固形製品が収容されている包装袋が提供される。 According to the present invention, there is also provided a packaging bag obtained by making the above film into a bag and containing the solid product.
　本発明の包装袋においては、次の態様が好適に採用される。
（ａ）前記固形製品が食品であること。
（ｂ）前記固形製品を構成する粒状物もしくは塊状物を互いに重ならないように平面上に載置して測定される固形製品の側断面長径Ｌの５０％径Ｌ５０が、下記式（１）；
　　　Ｌ５０＞ＤＡＶ　　　（１）
　　　式中、ＤＡＶは、前記凹凸構造における最も近接している凸部間の
　　　　１／２高さでの間隔Ｄの算術平均値を示す、
で表される条件を満足していること。
（ｃ）前記固形製品の側断面長径５０％径Ｌ５０が３０ｍｍ以下の範囲にあること。
（ｄ）前記前記固形製品を構成する粒状物もしくは塊状物がウエットな状態で存在しており、前記粗面の凹部には、前記固形製品由来の液体が存在していること。
（ｅ）前記液体が油分を含有すること。 In the packaging bag of the present invention, the following aspects are preferably adopted.
(A) The solid product is food.
(B) The 50% diameter L 50 of the side cross-sectional major axis L of the solid product measured by placing the granules or lumps constituting the solid product on a flat surface so as not to overlap each other is the following formula (1). ;
L 50 > D AV (1)
Wherein, D AV represents the arithmetic mean value of the distance D between a half height between the convex portion that is closest in the concavo-convex structure,
Satisfy the conditions represented by.
(C) The side cross-sectional major axis 50% diameter L 50 of the solid product is within the range of 30 mm or less.
(D) The granules or lumps constituting the solid product are present in a wet state, and the liquid derived from the solid product is present in the recesses on the rough surface.
(E) The liquid contains oil.
　本発明の包装用フィルムは、表面がウエットな状態にある固形製品、例えば調味液などが含侵された粒状物が接触した場合にも、フィルム面への付着を有効に抑制することができる。即ち、フィルム面から容易に払い落すことができる。従って、この包装用フィルムは、固形製品、特に食用の固形製品が充填された包装袋（パウチ）として極めて有用である。 The packaging film of the present invention can effectively suppress adhesion to the film surface even when a solid product having a wet surface, for example, a granular product impregnated with a seasoning liquid or the like comes into contact with the film. That is, it can be easily wiped off from the film surface. Therefore, this packaging film is extremely useful as a packaging bag (pouch) filled with solid products, particularly edible solid products.
本発明の包装用フィルムが有する凹凸構造の粗面の形態を、これに接触する固形製品と共に示す概略側断面図。The schematic side sectional view which shows the form of the rough surface of the concavo-convex structure which the packaging film of this invention has, together with the solid product which comes into contact with this. 本発明の原理を説明するための要部拡大図。An enlarged view of a main part for explaining the principle of the present invention. 粗面を形成する凸部の配列パターンの例を示す図。The figure which shows the example of the arrangement pattern of the convex part which forms a rough surface. 粗面を形成する凸部の形態の例を示す図。The figure which shows the example of the form of the convex part which forms a rough surface. 粗面の形成方法を説明するための図。The figure for demonstrating the method of forming a rough surface. 本発明の実施例及び比較例について、付着評価後のフィルム外観を撮影した図。The figure which photographed the appearance of the film after the adhesion evaluation about the Example and the comparative example of this invention. 本発明の実施例３及び比較例１について、排出評価後のパウチを撮影した図。The figure which photographed the pouch after the emission evaluation about Example 3 and Comparative Example 1 of this invention. 粗面を形成する凹凸構造における凸部間隔を説明するための図。The figure for demonstrating the convex part spacing in the concave-convex structure forming a rough surface.
＜固形製品＞
　本発明において、固形製品とは、互いに独立して挙動する多数の粒状物もしくは塊状物（以下、単に固形粒子と呼ぶことがある）からなるものであるが、袋詰めして販売可能なものである。即ち、納豆、焚いた米飯米などは、固形製品であっても粘着性が大き過ぎるため、袋詰めして販売されることはない。袋から取り出せなくなってしまうからである。 <Solid product>
In the present invention, the solid product is composed of a large number of particles or lumps (hereinafter, may be simply referred to as solid particles) that behave independently of each other, but can be sold in a bag. be. That is, natto, cooked rice, rice, etc. are not sold in bags because they are too sticky even if they are solid products. This is because it cannot be taken out of the bag.
　本発明が好適に適用される固形製品は、上記の固形粒子は、それぞれ液体が含浸されて表面がウエットな状態となっている。即ち、ある種のゲル状体や乳化物（例えば寒天、豆腐、ヨーグルト、マヨネーズ）などは、表面がウエットな状態となっているものの、形状が定まっておらず、一定の応力を加えると形状が変化してしまうため固形ではなく、本発明における固形製品ではない。また、固形の粒子が液体に分散されてペースト状となっているものは、粒子が独立して挙動するものではなく、粒子群が一体となって流動するため、本発明における固形製品ではなく、本発明は適用されない。
　また、ウエットでない固形製品について本発明を適用することはできるが、先にも述べたように、このような固形製品は、フィルム表面に付着することはなく、従って、本発明を適用する意味は無い。 In the solid product to which the present invention is preferably applied, the solid particles described above are each impregnated with a liquid and have a wet surface. That is, some gels and emulsions (for example, agar, tofu, yogurt, mayonnaise) have a wet surface, but their shapes are not fixed, and when a certain amount of stress is applied, the shapes change. It is not a solid product because it changes, and it is not a solid product in the present invention. Further, a paste in which solid particles are dispersed in a liquid is not a solid product in the present invention because the particles do not behave independently and the particles flow together. The present invention does not apply.
Further, although the present invention can be applied to non-wet solid products, as described above, such solid products do not adhere to the film surface, and therefore, it is meaningful to apply the present invention. No.
　また、本発明が好適に適用されるウエットな固体製品は、独立して挙動する固形粒子に液体が含浸され、この液体が表面に存在して濡れた状態にあるものであるが、魚介類のフレークのように、固形粒子がもともと多くの液体成分を含んでおり、この液体成分が表面に分布しているものであってもよい。この表面の濡れの程度（表面に存在している液体量に対応）は一概に規定することはできないが、多量に存在していると、この液体が隣接する粒状物若しくは塊状物の表面に存在する液体と合一してしまい、この結果、ペースト状物などと同様、固形粒子が液体と共に一体に流動してしまうこととなる。従って、本発明を適用することはできない。
　従って、固形粒子の表面に存在する液体量は、ある程度の量であることが必要である。このような液体量は、含浸させる液体の種類が多く、厳密に規定することはできないが、水分を含浸する場合は水分活性が０．３０～０．９９程度であり、油分のみを含浸する場合は固体製品の脂質が５～５０質量％程度である。
　尚、水分活性とは、食品中に含まれる自由水を示すパラメータであり、食品の水蒸気圧を同一条件での純水の水蒸気圧で除した値である。 Further, in a wet solid product to which the present invention is preferably applied, solid particles that behave independently are impregnated with a liquid, and the liquid is present on the surface and is in a wet state. Solid particles may originally contain many liquid components, such as flakes, and these liquid components may be distributed on the surface. The degree of wetting of this surface (corresponding to the amount of liquid present on the surface) cannot be unequivocally defined, but if it is present in large quantities, this liquid is present on the surface of adjacent granules or lumps. As a result, the solid particles flow together with the liquid as in the case of a paste-like substance. Therefore, the present invention cannot be applied.
Therefore, the amount of liquid present on the surface of the solid particles needs to be a certain amount. Such a liquid amount cannot be strictly specified because there are many types of liquids to be impregnated, but when impregnated with water, the water activity is about 0.30 to 0.99, and when impregnated with only oil. The lipid content of the solid product is about 5 to 50% by mass.
The water activity is a parameter indicating free water contained in the food, and is a value obtained by dividing the water vapor pressure of the food by the water vapor pressure of pure water under the same conditions.
　さらに、本発明における固体製品は、上記の固形粒子７が多数、容器内に収容されるものであり、過度に大きいものは、その重量により、フィルム表面に付着するという問題はほとんど生じない。このため、上記の固形粒子は、前記粒状物もしくは前記塊状物同士を重ならないようにして平面上に載置して側断面の径Ｌを算出し、積算分布において５０％径（即ちメディアン径）をＬ５０としたとき、この値が、３０ｍｍ以下であることが好ましい。 Further, in the solid product of the present invention, a large number of the above-mentioned solid particles 7 are contained in a container, and an excessively large solid product hardly causes a problem of adhering to the film surface due to its weight. Therefore, the solid particles are placed on a plane so that the granules or the agglomerates do not overlap each other, and the diameter L of the side cross section is calculated, and the diameter L is 50% (that is, the median diameter) in the integrated distribution. When L 50 , this value is preferably 30 mm or less.
　上記のような観点から、本発明が適用される固体製品は、これに限定されるものではないが、鮭フレーク・そぼろ・のりたま・昆布・たらこ・明太子・梅干し・高菜・ツナマヨ・うなぎなどの濡れた各種フリカケ、時雨煮、甘露煮、紅ショウガ、ガリ、福神漬け、シバ漬けなどの各種漬け物、佃煮等が代表的である。 From the above viewpoint, the solid product to which the present invention is applied is not limited to this, but wet salmon flakes, soboro, paste, kelp, tarako, mentaiko, pickled plum, takana, tuna mayo, eel, etc. Typical examples are various types of furikake, shigureni, kelp, pickled ginger, gari, pickled Fukujin, pickled shiba, and tsukudani.
＜固形製品と接触する面＞
　図１の概略図を参照して、本発明のフィルムの固形製品と接触する面１には、多数の凸部（突起）３を有する凹凸構造が形成されており、凸部３の間の空間が凹部５となっており、これにより、この固形製品と接触する面１は粗面となっている。
　本発明のフィルムでは、このような固形製品と接触する面（粗面）１に多数の固形粒子７が接触しており、この固形粒子７の表面には、それぞれ、液体９が分布している。 <Surface in contact with solid products>
With reference to the schematic view of FIG. 1, a concavo-convex structure having a large number of convex portions (projections) 3 is formed on the surface 1 of the film of the present invention in contact with the solid product, and the space between the convex portions 3 is formed. Is a concave portion 5, whereby the surface 1 in contact with the solid product is a rough surface.
In the film of the present invention, a large number of solid particles 7 are in contact with the surface (rough surface) 1 in contact with such a solid product, and the liquid 9 is distributed on the surface of the solid particles 7, respectively. ..
　図２を参照して、本発明においては、上記のように凸部３が形成されて面１が粗面となっているが、このような粗面が下記の条件（１）を満足することが好ましく、このような条件を満足するような粗面を形成したとき、固形製品（固形粒子７）の表面１（粗面）への付着がより有効に抑制される。
　　Ｌ５０＞ＤＡＶ　　　（１）
　上記式（１）中、Ｌ５０は前記固形粒子７について測定した側断面径Ｌの積算分布においての５０％径即ちメディアン径であり、ＤＡＶは、前記凹凸構造における最も近接している凸部３の１／２高さ（１／２ｈ）での間隔Ｄの算術平均値である。 With reference to FIG. 2, in the present invention, the convex portion 3 is formed and the surface 1 is a rough surface as described above, and such a rough surface satisfies the following condition (1). When a rough surface that satisfies such conditions is formed, adhesion of the solid product (solid particles 7) to the surface 1 (rough surface) is more effectively suppressed.
L 50 > D AV (1)
The formula (1), L 50 is a 50%径即Chi median diameter in cumulative distribution side sectional diameter L measured on the solid particles 7, D AV is convex portion that is closest in the uneven structure It is an arithmetic mean value of the interval D at 1/2 height (1 / 2h) of 3.
　上記の条件式（１）は、多くの実験の結果見出されたものであるが、このような条件式（１）を満足する場合、凸部３間の凹部５に空気層が形成され、固形粒子７は、このような空気層を介してフィルム表面１（粗面）上に存在することとなる。この結果、空気層が有する撥液性により、固形粒子７がフィルム表面１に付着せず、フィルム表面１上を容易に流動し、例えばこのフィルムにより形成された袋では、この固形製品（固形粒子）の袋内への付着残存が有効に抑制されるものと考えられる。 The above conditional expression (1) has been found as a result of many experiments, but when such a conditional expression (1) is satisfied, an air layer is formed in the concave portion 5 between the convex portions 3. The solid particles 7 are present on the film surface 1 (rough surface) via such an air layer. As a result, due to the liquid repellency of the air layer, the solid particles 7 do not adhere to the film surface 1 and easily flow on the film surface 1, for example, in a bag formed of this film, the solid particles (solid particles). ) Is considered to be effectively suppressed from remaining in the bag.
　例えば、上記式（１）の条件を満足せず、固形粒子７のＬ５０がＤＡＶ以下の場合には、小さなサイズの固形粒子７が多く存在しているため、小さな固形粒子７が凸部３間の凹部５内に入り込み、固形粒子７と表面１との間に空気層がほとんど形成されず、この結果、固形粒子７の多くが表面１に付着してしまう。しかるに、粗面が上記条件式（１）を満足するように形成されているときには、固体粒子７及び固形粒子７が有する液体９が凹部５内に侵入したとしても、その量は僅かであり、固形粒子７と表面１との間の空気層が確実に確保されるため、固形粒子の表面１への付着が有効に防止されるわけである。 For example, it does not satisfy the condition of the above formula (1), when L 50 of solid particles 7 is less than D AV, since the solid particles 7 of smaller size are abundant, small solid particles 7 protrusions It enters the recess 5 between the three and hardly forms an air layer between the solid particles 7 and the surface 1, and as a result, most of the solid particles 7 adhere to the surface 1. However, when the rough surface is formed so as to satisfy the above conditional expression (1), even if the solid particles 7 and the liquid 9 contained in the solid particles 7 enter the recess 5, the amount thereof is small. Since the air layer between the solid particles 7 and the surface 1 is surely secured, the solid particles are effectively prevented from adhering to the surface 1.
　尚、本発明において、凸部３の高さｈは特に制限されないが、この高さｈが低すぎると、僅かな量の液体９が凹部５内に侵入した時に凹部５が液体９で満杯になってしまい、空気層の形成が損なわれてしまう。従って、この凸部３の算術平均粗さＲａは、３μｍ以上であることが好ましく、より好ましくは１５μｍよりも大きく、さらに好ましくは３０μｍ以上である。
　また、凹部５が液体９で満杯になっておらず、空気層が形成されていたことを確認するには一度前記固形製品と接触した面の固形製品の固体成分が付着した部分における最大高さＲｚを測定すれば良く、その値は４μｍ以上が好ましく、より好ましくは１０μｍ以上、より好ましくは６０μｍ以上、さらに好ましくは１００μｍ以上である。 In the present invention, the height h of the convex portion 3 is not particularly limited, but if this height h is too low, the concave portion 5 is filled with the liquid 9 when a small amount of the liquid 9 enters the concave portion 5. This will impair the formation of the air layer. Therefore, the arithmetic average roughness Ra of the convex portion 3 is preferably 3 μm or more, more preferably larger than 15 μm, and further preferably 30 μm or more.
Further, in order to confirm that the recess 5 is not filled with the liquid 9 and the air layer is formed, the maximum height at the portion where the solid component of the solid product adheres on the surface once in contact with the solid product. Rz may be measured, and the value is preferably 4 μm or more, more preferably 10 μm or more, more preferably 60 μm or more, still more preferably 100 μm or more.
　尚、本発明において、上記のような凸部３は、種々のパターンで形成されていてよい。
　図３には、このような凸部３の配列パターンが示されている。 In the present invention, the convex portion 3 as described above may be formed in various patterns.
FIG. 3 shows such an arrangement pattern of the convex portions 3.
　例えば、図３（ａ）及び（ｂ）は、互いに平行に延びている凸部３同士が交差することにより、凸部３が格子状に配列されているパターンであり、図３（ａ）では、それぞれ平行に延びている凸部３が直交して長方形或いは正方形の格子が形成されている。また、図３（ｂ）では、それぞれ平行に延びている凸部３が傾斜して交差しており、平行四辺形或いは菱形形状の格子が形成されている。このような格子の形状は、このような矩形に限定されるものではなく。例えば凸部３の交点が厚く形成され、交点部が丸く形成されている亀甲形状を有していてもよい。 For example, FIGS. 3A and 3B are patterns in which the convex portions 3 are arranged in a grid pattern by intersecting the convex portions 3 extending in parallel with each other. In FIG. 3A, the convex portions 3 are arranged in a grid pattern. , The convex portions 3 extending in parallel are orthogonal to each other to form a rectangular or square grid. Further, in FIG. 3B, the convex portions 3 extending in parallel are inclined and intersect with each other to form a parallelogram-shaped or rhombic-shaped lattice. The shape of such a grid is not limited to such a rectangle. For example, it may have a hexagonal shape in which the intersections of the convex portions 3 are formed thickly and the intersections are formed in a round shape.
　また、図３（ｃ）のパターンは、凸部３が交差しないように線状に延びているパターンであり、このような線状に延びているパターンは、線の形状が直線に限定されるものではなく、例えば直線が途中で屈曲しているジグザグ形状でもよいし、線が曲線で構成されていてもよい。
　図３（ｄ）のパターンは、凸部３をドット状にランダムに配列されているパターンである。このようなドットの形状は円形に限定されるものではなく、例えば矩形であっても良い。 Further, the pattern of FIG. 3C is a pattern extending linearly so that the convex portions 3 do not intersect, and in such a pattern extending linearly, the shape of the line is limited to a straight line. It may be a zigzag shape in which a straight line is bent in the middle, or the line may be composed of a curved line.
The pattern of FIG. 3D is a pattern in which the convex portions 3 are randomly arranged in a dot shape. The shape of such dots is not limited to a circle, and may be, for example, a rectangle.
　また、凸部３の形態は、図１の例では、断面が長方形で示されているが、これに限定されるものではない。このような他の形状の例は図４に示した。
　例えば、図４に示されているように、凸部３の上端部に拡径した頭部３ａが形成された形態、錐形状、ドーム形状、球形状などすることもでき、不規則な形態であってもよいし、フラクタル構造に代表されるような凸部３の表面にさらに凹凸が存在するような２重階層凹凸構造を有していてもよい。 Further, the form of the convex portion 3 is shown by a rectangular cross section in the example of FIG. 1, but the shape is not limited to this. Examples of such other shapes are shown in FIG.
For example, as shown in FIG. 4, a shape in which an enlarged head portion 3a is formed at the upper end portion of the convex portion 3, a cone shape, a dome shape, a spherical shape, or the like can be formed, and the shape is irregular. It may be present, or it may have a double-layered concavo-convex structure such that the surface of the convex portion 3 is further concavo-convex as typified by a fractal structure.
　上記の何れのパターンにおいても、顕微鏡観察により、最も間隔の小さい凸部３を特定し、後述する実施例に記載されている方法で、少なくとも１０か所以上で１／２ｈでの間隔Ｄを測定し、その算術平均値ＤＡＶが算出される。 In any of the above patterns, the convex portion 3 having the smallest interval is identified by microscopic observation, and the interval D at at least 10 places or more is measured at 1 / 2h by the method described in Examples described later. Then, the arithmetic mean value DAV is calculated.
　また、本発明においては、上記式（１）を満足していることを条件として、上記の凸部３間の間隔Ｄの算術平均値ＤＡＶが７０μｍ以上であることが好ましい。即ち、間隔ＤＡＶが小さ過ぎると、毛管現象により固形粒子７の表面に存在している液体９が凸部３間の凹部５内に浸透し、凹部５が液体９で満杯になってしまい、固形粒子７の下に空気層が形成されず、この固形粒子７は、面１から剥がれ難くなってしまう。 In the present invention, the condition that satisfies the above formula (1), it is preferable arithmetic mean value D AV interval D between the projections 3 of the is 70μm or more. That is, if the interval DAV is too small, the liquid 9 existing on the surface of the solid particles 7 permeates into the concave portion 5 between the convex portions 3 due to the capillary phenomenon, and the concave portion 5 is filled with the liquid 9. An air layer is not formed under the solid particles 7, and the solid particles 7 are difficult to peel off from the surface 1.
　尚、凸部３の間の凹部５が液体７で充満すると、凸部３による光の散乱が緩和されて、このフィルムが固形粒子と接触する前では不透明であったものでも透明となってしまう。一方、本発明では、前述した式（１）を満足するように凸部３が形成されているため、固体製品（固形粒子）が面１に接触している状態でも凸部３間の凹部５に空気層が確保されており、従って、光の散乱により、固形製品が接触する前と同程度の透明度となっている。もちろん、本発明におけるフィルム部材は不透明であっても良いし、フィルムの透明性を確保するために予め凹凸形状を可視光の波長を考慮して、設計することで固形製品の付着の抑制と透明性を両立することも可能である。ここにおける透明性とはフィルム越しに固形製品の形、色を視認できることを意味し、ヘイズ値では７０％以下特に優れる場合は５０％以下である。 When the concave portion 5 between the convex portions 3 is filled with the liquid 7, the scattering of light by the convex portion 3 is alleviated, and even if the film is opaque before coming into contact with the solid particles, it becomes transparent. .. On the other hand, in the present invention, since the convex portion 3 is formed so as to satisfy the above-mentioned formula (1), the concave portion 5 between the convex portions 3 is formed even when the solid product (solid particles) is in contact with the surface 1. An air layer is secured in the air layer, and therefore, due to light scattering, the transparency is as high as before the solid product comes into contact with the solid product. Of course, the film member in the present invention may be opaque, and by designing the uneven shape in advance in consideration of the wavelength of visible light in order to ensure the transparency of the film, the adhesion of solid products is suppressed and the film is transparent. It is also possible to achieve both sex. The transparency here means that the shape and color of the solid product can be visually recognized through the film, and the haze value is 70% or less, and 50% or less when it is particularly excellent.
　このように、本発明では、固体粒子７が液体９で濡れている状態であっても、凸部３間の凹部５に空気層が形成されるため、このような固形粒子７（固形製品）の付着を有効に回避することができる。例えば、本発明のフィルム部により袋を形成し、この内部に濡れている固形製品、例えばフレーク状のサケフリカケを収容した場合、袋の一端を引き裂いて開口を形成し、倒立状態にして２～３回振る程度でほぼ全量を容易に取り出すことができる。 As described above, in the present invention, even when the solid particles 7 are wet with the liquid 9, an air layer is formed in the concave portions 5 between the convex portions 3, so that such solid particles 7 (solid products). Can be effectively avoided. For example, when a bag is formed by the film portion of the present invention and a wet solid product such as a flake-shaped bag is stored in the bag, one end of the bag is torn to form an opening, and the bag is turned upside down to form 2-3. Almost the entire amount can be easily taken out by shaking it.
　本発明において、上記のような凸部３を有する固形製品と接触する面１を有するフィルムは、所定形状に成形され得る限り任意のプラスチック、例えば、熱可塑性樹脂、熱硬化性樹脂、光硬化性樹脂などにより形成されていてよく、この成形体の用途に応じて、適宜の樹脂を選択すればよく、多層構造とすることも可能である。また、成形性の点で、熱可塑性樹脂が好適である。 In the present invention, the film having the surface 1 in contact with the solid product having the convex portion 3 as described above is any plastic as long as it can be molded into a predetermined shape, for example, a thermoplastic resin, a thermosetting resin, or a photocurable resin. It may be formed of a resin or the like, and an appropriate resin may be selected according to the use of the molded product, and a multi-layer structure is also possible. Further, in terms of moldability, a thermoplastic resin is preferable.
　一般に、包装材分野では、ポリスチレン、ポリエチレン、ポリプロピレン、エチレンもしくはプロピレンと他のオレフィンとの共重合体などに代表されるオレフィン系樹脂、エチレンとビニルアルコールとの共重合体、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンイソフタレート、ポリエチレンナフタレート等のポリエステルが代表的である。
　また、本発明においては固形製品由来の液体が凹部５内に浸透していくことが想定されるが、液体が凸部３を有するプラスチックの固形製品と接触した面の背面まで浸透してしまうことを防止するためにバリア層を設けることも可能である。 Generally, in the field of packaging materials, olefin resins typified by polystyrene, polyethylene, polypropylene, ethylene or a copolymer of propylene and other olefins, a copolymer of ethylene and vinyl alcohol, polyethylene terephthalate (PET), etc. Typical examples are polymers such as polyethylene isophthalate and polyethylene naphthalate.
Further, in the present invention, it is assumed that the liquid derived from the solid product permeates into the concave portion 5, but the liquid permeates to the back surface of the surface in contact with the solid plastic product having the convex portion 3. It is also possible to provide a barrier layer to prevent this.
＜凹凸構造の形成＞
　本発明において、上述した凸部３による凹凸構造は、種々の方法で作成することができ、例えば、転写法、サンドブラスト法、樹脂繊維の吹き付けを利用した方法を採用することができるし、また、原理的には、不織布の貼り付けにより、表面を不織布層とすることにより、凹凸構造を形成することも可能である。しかしながら、樹脂繊維や不織布を用いる方法では、繊維屑の発生などの問題があり、サンドブラスト法では使用するメディア（投射材、研磨材）のコンタミなどの問題があるため、転写法により形成することが望ましい。 <Formation of uneven structure>
In the present invention, the concave-convex structure formed by the convex portion 3 described above can be created by various methods, and for example, a transfer method, a sandblast method, or a method using spraying of a resin fiber can be adopted. In principle, it is also possible to form a concavo-convex structure by forming a non-woven fabric layer on the surface by attaching a non-woven fabric. However, the method using resin fibers or non-woven fabric has problems such as generation of fiber waste, and the sandblasting method has problems such as contamination of the media (projection material, abrasive) used, so that it can be formed by the transfer method. desirable.
　上述した凸部３を形成する転写法としては、表面に凹凸構造が転写された金型を用いての射出成形法もあるが、バッチ式で連続生産性に劣るため、図５に示すプロセスで転写法を実施することが好適である。 As a transfer method for forming the convex portion 3 described above, there is also an injection molding method using a mold in which an uneven structure is transferred on the surface, but since it is a batch type and inferior in continuous productivity, the process shown in FIG. 5 is used. It is preferable to carry out the transfer method.
　図５（ａ）の例では、押出機４１から出てきた溶融状態のプラスチックフィルムを凹凸構造が付与されたロール４３上に押出し、ニップロール４５にて加圧しながら、冷却固化させることで表面に凹凸構造が転写されたフィルム４７が得られる。
　また、図５（ｂ）では、射出成形、押出成形等により成形されたプラスチックフィルムを、それ自体公知の加熱方法により予熱し、凹凸構造が付与されたロール４３とニップロール４５間で加圧しながら冷却させることにより、表面に凹凸構造が転写されたフィルム４７を製造している。
　さらに、図５（ｃ）では、表面に凹凸構造が付与されたベルト６１とニップベルト６３の間で温度制御された複数のロール６５にてプラスチックフィルムを加圧しながら冷却させている。
　勿論、図示はされていないが、ホットプレス機を用いて凹凸構造が転写された金型にて押圧し、冷却させるという手段も採用することができる。 In the example of FIG. 5A, the molten plastic film from the extruder 41 is extruded onto a roll 43 having an uneven structure, and the surface is uneven by cooling and solidifying while pressurizing with the nip roll 45. A film 47 to which the structure has been transferred is obtained.
Further, in FIG. 5B, a plastic film formed by injection molding, extrusion molding, or the like is preheated by a heating method known per se, and cooled while being pressurized between the roll 43 and the nip roll 45 having the uneven structure. By doing so, a film 47 having an uneven structure transferred to the surface is manufactured.
Further, in FIG. 5C, the plastic film is cooled while being pressed by a plurality of rolls 65 whose temperature is controlled between the belt 61 having the uneven structure on the surface and the nip belt 63.
Of course, although not shown, a means of pressing with a mold to which the uneven structure is transferred using a hot press machine to cool the surface can also be adopted.
　尚、上述したロール４３、凹凸構造が転写された金型、ベルト６１は公知のドライエッチング法、ウェットエッチング法、フォトエッチング法、サンドブラスト法、レーザー彫刻法、切削彫刻法などにより凹凸形状の転写するための形状を表面に形成することで作製することができる。 The roll 43, the mold on which the uneven structure is transferred, and the belt 61 are transferred into the uneven shape by a known dry etching method, wet etching method, photo etching method, sandblasting method, laser engraving method, cutting engraving method, or the like. It can be manufactured by forming a shape for the surface on the surface.
　このようにして得られた凹凸構造を有するフィルムは、チューブ、カップ、トレイ等の形態の容器に成形し、或いはトレイ、カップ容器内の付着防止フィルムやバランに代表される仕切り部材など、特にウエットな固形製品が接触する部材に適用できるが、一般的には、ヒートシールなどの公知の手段により、袋状の形態（所謂パウチ）として使用することが最も好適である。 The film having the uneven structure thus obtained is formed into a container in the form of a tube, a cup, a tray, etc., or is particularly wet, such as an adhesion prevention film in a tray or a cup container, a partition member typified by a balun, or the like. Although it can be applied to a member with which a solid product comes into contact, it is generally most preferably used in a bag-like form (so-called pouch) by a known means such as a heat seal.
　本発明のフィルム部材は、種々の固形製品に適用できるが、特に液体の含浸により表面がウエットな状態となっている固形製品、例えば、糖類が溶解もしくは分散した粘調液、みりん等の含水アルコールや各種の煮液、サラダ油、ゴマ油などの植物油、各種動物の肉汁などが表面に存在する固形粒子７からなる固形製品に、本発明を適用したとき、最も効果的であり、特に固形粒子に調味液などを含浸させる食品類を収容する袋状容器として使用することが最適である。 The film member of the present invention can be applied to various solid products, but in particular, solid products whose surface is in a wet state due to impregnation with a liquid, for example, a viscous liquid in which saccharides are dissolved or dispersed, or a hydrous alcohol such as mirin. When the present invention is applied to a solid product consisting of solid particles 7 in which various boiled liquids, vegetable oils such as salad oil and sesame oil, and meat juices of various animals are present on the surface, the present invention is most effective, and especially seasoning to solid particles. It is best used as a bag-shaped container for storing foods impregnated with liquid or the like.
　本発明を次の実施例によりさらに説明するが、本発明は次の例により何らかの制限を受けるものではない。尚、実施例及び比較例の各種評価方法は以下の通りである。 The present invention will be further described by the following examples, but the present invention is not limited by the following examples. Various evaluation methods of Examples and Comparative Examples are as follows.
（評価対象とした固形製品）
　実施例においては下記固形製品を評価対象に用いた。
　　Ａ：ウエットなさけふりかけ（脂質３２．５質量％）
　　Ｂ：ウエットな牛肉ふりかけ（脂質２５．０質量％）
　　Ｃ：ウエットなツナマヨふりかけ（脂質２７．５％） (Solid product to be evaluated)
In the examples, the following solid products were used as evaluation targets.
A: Wet sprinkle (32.5% by mass of lipid)
B: Wet beef sprinkle (lipid 25.0% by mass)
C: Wet tuna mayonnaise sprinkle (27.5% lipid)
（付着評価）
　固形製品の付着量を評価するために下記条件で付着評価を実施した。
　サンプルフィルムを固定する為に白画用紙に両面テープを用いて貼り付け、５×２ｃｍのサイズにカットし、サンプル台紙を作製する。
　次に固形製品５０ｇをアズワン製／容量２０００ｍｌのディスポカップに投入し、固形製品とディスポカップの間にサンプル台紙を粗面が固形製品を接する様に埋める。
　その後、ディスポカップを左右に２０秒振とうさせ、ピンセットを用いそっとサンプルを回収する。
　回収の際、サンプルは衝撃・振動を与えないように９０°傾斜させてサンプル台紙から固形製品を自重により落下させる。自重で落下せず、サンプルの粗面に付着した固形製品の量を確認するためにカメラで評価面の外観を撮影した。この評価においては、下記比較例１～３（凹凸なし）と同程度の付着量のサンプルを×、明確に付着量を少ないサンプルを○として評価した。 (Adhesion evaluation)
Adhesion evaluation was carried out under the following conditions in order to evaluate the adhesion amount of solid products.
To fix the sample film, attach it to white drawing paper using double-sided tape and cut it to a size of 5 x 2 cm to prepare a sample mount.
Next, 50 g of the solid product is put into a disposable cup made by AS ONE / capacity of 2000 ml, and a sample mount is embedded between the solid product and the disposable cup so that the rough surface is in contact with the solid product.
Then, shake the disposable cup left and right for 20 seconds, and gently collect the sample using tweezers.
At the time of collection, the sample is tilted 90 ° so as not to give impact or vibration, and the solid product is dropped from the sample mount by its own weight. The appearance of the evaluation surface was photographed with a camera to check the amount of solid products adhering to the rough surface of the sample without falling due to its own weight. In this evaluation, a sample having the same amount of adhesion as in Comparative Examples 1 to 3 below (without unevenness) was evaluated as x, and a sample having a clearly small amount of adhesion was evaluated as ◯.
（排出評価）
　実施例及び比較例からそれぞれ３例ずつ抽出し、パウチ形態でも付着を抑制できるか確認する為に排出試験を実施した。
　１０×１４ｃｍ、シール幅各１０ｍｍの三方シールのサンプルパウチを作製し、固形製品１９．２ｇを充填シールした。その後、固形製品がサンプルパウチ内面に万遍なく接触するようにした後、１日正置状態で室温（２５℃）下にて保管した。保管後、一方の短辺側のシール部をハサミにてカットし、長辺側シール部を両手で掴み、ハサミでカットした部分をしたに向け、パウチＡをそれ以上排出されなくなるまで何度も閉開口を繰り返した。
　このときの残量が１ｇより多いものは×、１ｇ以下は○として評価した。 (Emission evaluation)
Three cases were extracted from each of the examples and the comparative examples, and a discharge test was conducted to confirm whether the adhesion could be suppressed even in the pouch form.
A sample pouch with a three-way seal of 10 × 14 cm and a seal width of 10 mm was prepared, and 19.2 g of a solid product was filled and sealed. Then, the solid product was brought into contact with the inner surface of the sample pouch evenly, and then stored at room temperature (25 ° C.) in an upright position for one day. After storage, cut the seal on one short side with scissors, grab the seal on the long side with both hands, and point the cut part with scissors until the pouch A is no longer ejected. The closing opening was repeated.
At this time, those having a remaining amount of more than 1 g were evaluated as x, and those having a remaining amount of 1 g or less were evaluated as ◯.
（凹凸の形状評価）
　凹凸の形状評価は凸部の間隔ＤＡＶ測定並びにサンプルフィルムＲａ測定、排出試験後のＲｚ測定を実施した。これらの評価はレーザー顕微鏡（キーエンス社製ＶＫ－Ｘ２５０）にて測定し、解析にはマルチファイル解析アプリケーションｖｅｒ１．３．１（キーエンス社製ＶＫ－Ｈ１ＸＭ）を用いて行った。 (Evaluation of uneven shape)
For the shape evaluation of the unevenness, the distance DAV measurement of the convex portion, the sample film Ra measurement, and the Rz measurement after the discharge test were carried out. These evaluations were measured with a laser microscope (VK-X250 manufactured by KEYENCE CORPORATION), and the analysis was performed using a multi-file analysis application ver1.3.1 (VK-H1XM manufactured by KEYENCE CORPORATION).
（凸部の間隔測定）
　まず、凸部が格子状に配列されている場合は一つの凹部の中心を基点にして隣接するあらゆる方向の凹部の中心に向かって、凸部が互いに交差しないように線状に配列されている場合は一つの凸部の中心を基点にして隣接する凸部の中心に向かって、凸部がドット状に配列されている場合は一つの凸部の中心を基点にして隣接するあらゆる方向の凸部の中心に向かって、断面曲線を取得する。この際の断面曲線は評価長さが凹凸形状の周期長の２以上の整数倍となるようにし、後述するカットオフ値を用い粗さ曲線を取得した。
　カットオフ値の選定は以下の手順で行った。まず、カットオフ値を用いずに粗さ曲線を取得しＲｓｍを測定する。次にそのＲｓｍの値から一時的なカットオフ値を選定した。
　　０．０１３＜Ｒｓｍ≦０．０４のとき、カットオフ値０．０８ｍｍ
　　０．０４＜Ｒｓｍ≦０．１３のとき、カットオフ値０．２５ｍｍ
　　０．１３＜Ｒｓｍ≦０．４のとき、カットオフ値０．８ｍｍ
　　０．４＜Ｒｓｍ≦１．３のとき、カットオフ値２．５ｍｍ
　　１．３＜Ｒｓｍ≦４のとき、カットオフ値８ｍｍ
　最後に一時的なカットオフを用い、粗さ曲線を再取得してＲｓｍが変化し、Ｒｓｍが上述のカットオフ値の範囲から外れていないか確認し、正式にカットオフ値を選定し、粗さ曲線を再々取得することとした。凸部間隔距離は粗さ曲線から図８に示すように凹部の下点を基準高さとしたときに、凸部の頂点に対する１／２高さＨにおける凹凸の間隔Ｄを測定した。 (Measurement of convex spacing)
First, when the convex portions are arranged in a grid pattern, the convex portions are arranged linearly from the center of one concave portion toward the center of the concave portions in all adjacent directions so that the convex portions do not intersect each other. In the case, the center of one convex part is used as the base point and toward the center of the adjacent convex part. Acquire the cross-section curve toward the center of the part. The cross-sectional curve at this time was set so that the evaluation length was an integral multiple of 2 or more of the periodic length of the uneven shape, and the roughness curve was obtained using the cutoff value described later.
The cutoff value was selected according to the following procedure. First, the roughness curve is acquired and Rsm is measured without using the cutoff value. Next, a temporary cutoff value was selected from the Rsm value.
When 0.013 <Rsm ≤ 0.04, the cutoff value is 0.08 mm.
When 0.04 <Rsm ≤ 0.13, the cutoff value is 0.25 mm.
When 0.13 <Rsm ≤ 0.4, the cutoff value is 0.8 mm.
When 0.4 <Rsm ≤ 1.3, the cutoff value is 2.5 mm.
When 1.3 <Rsm ≦ 4, the cutoff value is 8 mm.
Finally, using a temporary cutoff, reacquire the roughness curve to check if the Rsm changes and the Rsm is out of the above cutoff value range, formally select the cutoff value, and coarsen. I decided to get the roughness curve again. As shown in FIG. 8, the distance between the convex portions was measured from the roughness curve, when the lower point of the concave portion was taken as the reference height, and the distance D between the convex portions at 1/2 height H with respect to the apex of the convex portion was measured.
　尚、この間隔Ｄは、凹凸を設けていない場合及び凸部の高さが不十分の場合には測定が困難であるので、高さＨが３μｍ未満の場合には測定不可能とした。
　前述したとおり、隣接する凹部又は凸部が複数の方向に対して存在する場合もあるが、その場合は各方向の間隔Ｄを測定しその中で最も間隔Ｄの小さい方向をそのサンプルにおけるＤＡＶを測定する方向とした。もちろん、図３（ｃ）や後述する実施例５、１０、１５のように隣接する凹凸が存在しない方向が存在する場合はその方向に垂直な方向をＤＡＶを測定する方向とした。そしてＤＡＶを測定する方向に対して粗さ曲線を取得し、少なくとも１０カ所以上で間隔Ｄを測定し、その算術平均値をＤＡＶとした。 Since it is difficult to measure this interval D when the unevenness is not provided or when the height of the convex portion is insufficient, it is not possible to measure when the height H is less than 3 μm.
As described above, there is a case where recesses or protrusions adjoining exists for a plurality of directions, in which case measures the distance D in each direction D AV in the sample the smaller direction most distance D in which Was the direction of measurement. Of course, when there is a direction in which adjacent irregularities do not exist as in FIG. 3C and Examples 5, 10 and 15 described later, the direction perpendicular to that direction is set as the direction for measuring DAV. And obtains the roughness curve to the direction of measuring D AV, measure the distance D at least 10 or more locations, the arithmetic mean value was D AV.
（Ｒａの測定）
　ＤＡＶを測定した方向において、取得した粗さ曲線からＲａを算出した。少なくとも２本以上の粗さ曲線からＲａを算出し、その算術平均値をそのサンプルのＲａとした。
　尚、ＤＡＶと同様に高さＨが３μｍ未満の場合には測定不可能とした。 (Measurement of Ra)
Ra was calculated from the acquired roughness curve in the direction in which DAV was measured. Ra was calculated from at least two or more roughness curves, and the arithmetic mean value was taken as Ra of the sample.
Incidentally, D AV as well as the height H is the measurement impossible in the case of less than 3 [mu] m.
（Ｒｚの測定）
　排出評価を実施した後のパウチに対してＤＡＶを測定した方向と同じ方向に前述した方法に倣い粗さ曲線を取得し、Ｒｚを測定した。少なくとも２本以上の粗さ曲線からＲｚを算出し、その算術平均値をそのサンプルのＲｚとした。Ｒｚの値から凹凸の凹部が内容品由来の液体により埋まっておらず空気層が確保されていたことを確認した。
　尚、ＤＡＶと同様に高さＨが３μｍ未満の場合には測定不可能とした。 (Measurement of Rz)
Discharge evaluation acquires a roughness curve Following the method described above in the same direction as the direction of measurement of the D AV against pouch after performing were measured Rz. Rz was calculated from at least two or more roughness curves, and the arithmetic mean value was taken as the Rz of the sample. From the value of Rz, it was confirmed that the concave and convex recesses were not filled with the liquid derived from the contents and the air layer was secured.
Incidentally, D AV as well as the height H is the measurement impossible in the case of less than 3 [mu] m.
（固形製品の側断面径測定）
　固形製品を板の上に取り出し、カメラもしくは顕微鏡で撮影した粒子の光学画像を画像解析することで即断面径測定した。板は汚れや傷の写り込みがない単色のもので固形製品の色相と異なるように白色のポリプロピレン製トレイを用いた。
　粒子光学画像の撮影には三洋電機社製Ｘａｃｔｉ　ＤＭＸ－ＨＤ１０１０を用い、画像解析にはキーエンス社製デジタルマイクロスコープＶＨＸ－６０００に搭載されている自動面積（粒子カウント）計測機能を用いた。
　形製品を取り出した際に、互いに接触もしくは重なる粒子は、少なくすることが望ましいため、粒子が崩れたり変形したりしない程度にピンセットなどを使用して動かした。カメラの倍率は粒子の大きさによって決定し、画面内に粒子が５０～２００個写るようにし、画面内を粒子が占める割合を２０％程度とした。
　また、固形製品を取り出す際に、板への張り付きおよび凝集を防ぐ目的で、イオナイザなどを使用して板の静電気を除去したり、１０度程度傾斜させたりしてもよいこととした。画像解析は、撮影した粒子の光学画像を２値化して粒子の輪郭を抽出し、この輪郭の最小径を測定した。最小径は、粒子の輪郭を２本の平行線で接するように挟み、この２本の平行線の間隔が最小となるときの値とした。
　２値化は明度差、色相差、彩度差のパラメータを用いて行った。粒子の最小径を測定結果から、固形製品の積算分布における５０％径、即ちメディアン径Ｌ５０を算出した。 (Measurement of side cross-sectional diameter of solid products)
The solid product was taken out on a plate, and the optical image of the particles taken with a camera or a microscope was image-analyzed to measure the cross-sectional diameter immediately. The board was a single color with no stains or scratches, and a white polypropylene tray was used so that the hue of the solid product would be different.
The Xacti DMX-HD1010 manufactured by Sanyo Electric Co., Ltd. was used for taking the particle optical image, and the automatic area (particle count) measuring function mounted on the digital microscope VHX-6000 manufactured by Keyence Co., Ltd. was used for the image analysis.
When the shaped product was taken out, it was desirable to reduce the number of particles that came into contact with each other or overlapped with each other. Therefore, the particles were moved using tweezers or the like to the extent that the particles did not collapse or deform. The magnification of the camera was determined by the size of the particles, 50 to 200 particles were captured on the screen, and the ratio of the particles in the screen was about 20%.
Further, when taking out the solid product, in order to prevent sticking to the plate and aggregation, the plate may be tilted by about 10 degrees or the static electricity of the plate may be removed by using an ionizer or the like. In the image analysis, the optical image of the captured particles was binarized, the contour of the particles was extracted, and the minimum diameter of the contour was measured. The minimum diameter was set when the contour of the particle was sandwiched between two parallel lines so that the distance between the two parallel lines became the minimum.
The binarization was performed using the parameters of lightness difference, hue difference, and saturation difference. The minimum diameter of the particles from the measured results was calculated a 50% diameter in cumulative distribution of the solid product, i.e. a median diameter L 50.
（凹部に存在する液体の確認）
　凹部に存在する液体に関しては排出試験を実施したサンプル及び排出試験前のサンプル、固形製品を用いて確認した。
　観察にはＦＴ－ラマン（Ｔｈｅｒｍｏ社製ＤＸＲ　Ｒａｍａｎ　Ｍｉｃｒｏｓｃｏｐｅ）を用い、固体の固形製品が付着していないサンプル凹部に測定箇所に定め、波長５３２ｎｍのレーザーを用いて、出力１０ｍＷ、露光時間１０秒　積算回数２０回の条件でスペクトルを取得した。また、固形製品由来の液体のスペクトルを取得する為に対象の固形製品をピンセットでつまみ、スライドガラスに擦りつけることで固形製品の由来の液体を付着させた。排出試験直後のサンプル、排出試験前のサンプル、固形製品由来の液体の各スペクトルを比較し、排出試験前のサンプルスペクトルでは存在しないが排出評価後のサンプル及び固形製品由来の液体のサンプルスペクトルには存在するピークがあるか否かで固形製品由来の液体が凹部に存在するかを判定した。このピークが確認できたものを○、できなかったものを×で示した。 (Confirmation of liquid present in the recess)
The liquid present in the recess was confirmed using the sample subjected to the discharge test, the sample before the discharge test, and the solid product.
For observation, FT-Raman (DXR Raman Microscope manufactured by Thermo) was used, and the measurement point was set in the sample recess where solid solid products did not adhere. Using a laser with a wavelength of 532 nm, the output was 10 mW and the exposure time was 10 seconds. The spectrum was acquired under the condition of 20 times. Further, in order to obtain the spectrum of the liquid derived from the solid product, the target solid product was pinched with tweezers and rubbed against the slide glass to attach the liquid derived from the solid product. The spectra of the sample immediately after the discharge test, the sample before the discharge test, and the liquid derived from the solid product are compared, and the sample spectra of the sample after the emission evaluation and the liquid derived from the solid product, which are not present in the sample spectrum before the discharge test, are shown. Whether or not the liquid derived from the solid product was present in the recess was determined based on the presence or absence of the existing peak. Those in which this peak was confirmed are indicated by ○, and those in which this peak could not be confirmed are indicated by ×.
＜実施例１＞
　凹凸形状が賦形されたチルロールにＰＥ（ポリエチレン）樹脂を押出し、凹部が５０μｍ角の正方形で形成されているエンボスフィルムを作製した。作製したエンボスフィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価、測定を実施した。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 1>
A PE (polyethylene) resin was extruded onto a chill roll having an uneven shape to prepare an embossed film having recesses formed in a square shape of 50 μm square. The embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例２＞
　凹凸形状が賦形されたチルロールにＰＥ樹脂を押出し、凹部が長軸１．２ｍｍ、短軸０．９５ｍｍの楕円（亀甲形状）で形成されているＰＥ製のエンボスフィルムを作製した。作製したエンボスフィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 2>
A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the recesses were formed of an ellipse (turtle shell shape) having a major axis of 1.2 mm and a minor axis of 0.95 mm. The embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例３＞
　凹凸形状が賦形されたチルロールにＰＥ樹脂を押出し、凸部が長軸０．７５ｍｍ、短軸０．５５ｍｍのダイヤ状で形成されているＰＥ製のエンボスフィルムを作製した。作製したエンボスフィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。さらに、排出評価後のパウチの写真を図７に示した。 <Example 3>
A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the convex portions were formed in a diamond shape with a major axis of 0.75 mm and a minor axis of 0.55 mm. The embossed film produced was subjected to the above-mentioned various evaluations and measurements using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG. Further, a photograph of the pouch after the emission evaluation is shown in FIG.
＜実施例４＞
　凹凸形状が賦形されたチルロールにＰＥ樹脂を押出し、凹部が長軸４ｍｍ、短軸２．２ｍｍのダイヤ状に形成されているＰＥ製のエンボスフィルムを作製した。作製したエンボスフィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 4>
A PE resin was extruded onto a chill roll having an uneven shape to prepare an embossed film made of PE in which the recesses were formed in a diamond shape with a major axis of 4 mm and a minor axis of 2.2 mm. The embossed film produced was subjected to the above-mentioned various evaluation measurements using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例５＞
　レーザー加工により凹凸が付与された転写板を用意し、ＰＥフィルム（タマポリ社製、Ｖ－１）に対してホットプレスすることで、凸部の幅１６５μｍ、凹部の幅が１３５μｍのライン＆スペースのＰＥ製凹凸フィルムを作製した。
　作製した凹凸フィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 5>
A transfer plate with irregularities given by laser processing is prepared and hot-pressed against a PE film (manufactured by Tamapoli, V-1) to create a line and space with a convex portion width of 165 μm and a concave portion width of 135 μm. An uneven film made of PE was produced.
The above-mentioned various evaluation measurements were performed on the produced uneven film using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例６＞
　フォトエッジング法により凹凸が付与された転写板を用意し、ＰＥ（タマポリ社製、Ｖ－１）に対してホットプレスすることで、径２００μｍ、高さ５０μｍ、ピッチ２７０μｍの円柱ピラー形状のＰＥ製凹凸フィルムを作製した。
　作製した凹凸フィルムに対して、ウエットな牛肉ふりかけを固形製品として上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 6>
A transfer plate with irregularities is prepared by the photo edging method, and by hot pressing against PE (manufactured by Tamapoli, V-1), it is made of PE with a diameter of 200 μm, a height of 50 μm, and a pitch of 270 μm. An uneven film was produced.
The above-mentioned various evaluation measurements were performed on the produced uneven film using a wet beef sprinkle as a solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例７＞
　実施例１において、固形製品にウエットなさけふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 7>
In Example 1, a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例８＞
　実施例２において、固形製品にウエットなさけふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 8>
In Example 2, a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例９＞
　実施例３において、固形製品にウエットなさけふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 9>
In Example 3, a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１０＞
　実施例５において、固形製品にウエットなさけふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 10>
In Example 5, a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１１＞
　実施例６において、固形製品にウエットなさけふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 11>
In Example 6, a PE concavo-convex film was produced in the same manner except that a wet sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１２＞
　実施例１において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 12>
In Example 1, a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１３＞
　実施例２において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 13>
In Example 2, a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１４＞
　実施例３において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 14>
In Example 3, a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluation measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１５＞
　実施例５において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Example 15>
In Example 5, a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluations and measurements were performed.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜実施例１６＞
　実施例６において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、ＰＥ製凹凸フィルムを作製し、上述した各種評価、確認を実施した。 <Example 16>
In Example 6, a PE concavo-convex film was prepared in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product, and the above-mentioned various evaluations and confirmations were carried out.
＜比較例１＞
　凹凸付与していないＰＥフィルム（タマポリ社製、Ｖ－１）に対してウエットな牛肉ふりかけを固形製品として上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。さらに、排出評価後のパウチの外観写真を図７に示した。 <Comparative Example 1>
The above-mentioned various evaluations and measurements were carried out using a wet beef sprinkle as a solid product on a PE film (manufactured by Tamapoli Co., Ltd., V-1) having no unevenness.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG. Further, a photograph of the appearance of the pouch after the emission evaluation is shown in FIG.
＜比較例２＞
　比較例１において、固形製品にウエットなさけふりかけを用いる以外は同様にして、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Comparative Example 2>
In Comparative Example 1, the above-mentioned various evaluations and measurements were carried out in the same manner except that a wet furikake was used for the solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜比較例３＞
　比較例１において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Comparative Example 3>
In Comparative Example 1, the above-mentioned various evaluations and measurements were carried out in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜比較例４＞
　実施例４において、固形製品にウエットなさけふりかけを用いる以外は同様にして、上述した各種評価、測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Comparative Example 4>
In Example 4, various evaluations and measurements described above were carried out in the same manner except that a wet furikake was used for the solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
＜比較例５＞
　実施例４において、固形製品にウエットなツナマヨふりかけを用いる以外は同様にして、上述した各種評価測定を行った。
　フィルムが有する粗面の形態及び用いた固形製品を表１に示し、各種測定結果を表２に示した。また、付着評価後のフィルムの外観写真を図６に示した。 <Comparative Example 5>
In Example 4, the above-mentioned various evaluation measurements were carried out in the same manner except that a wet tuna mayonnaise sprinkle was used for the solid product.
The morphology of the rough surface of the film and the solid products used are shown in Table 1, and various measurement results are shown in Table 2. Further, a photograph of the appearance of the film after the adhesion evaluation is shown in FIG.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表１、２及び図６からも明らかなように、本発明によりウエットな固形製品の付着量を低減できすることができる。さらに排出評価後のパウチの外観写真を示す図７から理解されるように、パウチの形態でも付着が抑制され、排出性が高められていることがわかる。 As is clear from Tables 1, 2 and 6, the amount of wet solid products attached can be reduced by the present invention. Further, as can be understood from FIG. 7 showing a photograph of the appearance of the pouch after the discharge evaluation, it can be seen that the pouch morphology also suppresses adhesion and enhances the discharge property.
　　　　１：固形製品が接触する面
　　　　３：凸部
　　　　５：凹部
　　　　７：固形粒子
　　　　９：液体 1: Surface with which solid products come into contact 3: Convex 5: Concave 7: Solid particles 9: Liquid

Claims (10)

  1. 　互いに独立して挙動する多数の粒状物もしくは塊状物からなる固形製品の包装に使用される固形製品包装用フィルムにおいて、
    　前記固形製品が接触する面が凹凸構造の粗面となっていることを特徴とする固形製品包装用フィルム。     In a solid product packaging film used for packaging solid products consisting of a large number of granules or lumps that behave independently of each other.
    A film for packaging a solid product, wherein the surface with which the solid product comes into contact is a rough surface having an uneven structure.
  2. 　前記粗面の算術平均粗さＲａが３μｍより大きい請求項１に記載の固形製品包装用フィルム。 The solid product packaging film according to claim 1, wherein the arithmetic average roughness Ra of the rough surface is larger than 3 μm.
  3. 　前記粗面は熱可塑性樹脂により形成されている請求項１に記載の固形製品包装用フィルム。 The solid product packaging film according to claim 1, wherein the rough surface is formed of a thermoplastic resin.
  4. 　前記凹凸構造において、前記凸部が格子状、平行な線状或いはドット状に配列されている請求項１に記載の固形製品包装用フィルム。 The solid product packaging film according to claim 1, wherein in the uneven structure, the convex portions are arranged in a grid pattern, parallel linear lines, or dots.
  5. 　請求項１に記載のフィルムを製袋して得られ且つ前記固形製品が収容されている包装袋。 A packaging bag obtained by making the film according to claim 1 and containing the solid product.
  6. 　前記固形製品が食品である請求項５に記載の包装袋。 The packaging bag according to claim 5, wherein the solid product is a food product.
  7. 　前記固形製品を構成する粒状物もしくは塊状物を互いに重ならないように平面上に載置して測定される固形製品の側断面長径Ｌの５０％径Ｌ５０が、下記式（１）；
    　　　Ｌ５０＞ＤＡＶ　　　（１）
    　　　式中、ＤＡＶは、前記凹凸構造における最も近接している凸部
    　　　　間の１／２高さでの間隔Ｄの算術平均値を示す、
    で表される条件を満足している請求項５に記載の包装袋。     The 50% diameter L 50 of the side cross-sectional major axis L of the solid product measured by placing the granules or lumps constituting the solid product on a flat surface so as not to overlap each other is the following formula (1);
    L 50 > D AV (1)
    Wherein, D AV represents the arithmetic mean value of the distance D between a half height between the convex portion that is closest in the concavo-convex structure,
    The packaging bag according to claim 5, which satisfies the conditions represented by.
  8. 　前記固形製品の側断面長径５０％径Ｌ５０が３０ｍｍ以下の範囲にある請求項７に記載の包装袋。 The packaging bag according to claim 7 solid side cross sectional length 50% diameter L 50 of the product in the following range 30 mm.
  9. 　前記前記固形製品を構成する粒状物もしくは塊状物がウエットな状態で存在しており、前記粗面の凹部には、前記固形製品由来の液体が存在している請求項７に記載の包装袋。 The packaging bag according to claim 7, wherein the granules or lumps constituting the solid product are present in a wet state, and the liquid derived from the solid product is present in the concave portion of the rough surface.
  10. 　前記液体が油分を含有する請求項９に記載の包装袋。 The packaging bag according to claim 9, wherein the liquid contains oil.
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