Film-wrapped tissue assembly package and packaging material for film-wrapped tissue assembly package

Abstract

To provide a film packaging tissue collective package that can achieve reduction of environmental load by using biomass raw material while enabling the same handling and manufacturing as a conventional collective package.SOLUTION: There is provided a film packaging tissue collective package in which a plurality of film packaging tissues are gusset-wrapped with a handle part on the top surface side by an exterior film. The exterior film is a biomass film containing 10 mass% or less of a biomass raw material, has a blocking degree of 120 mN or less, and has a tensile elastic modulus in a TD direction of 380 to 460 Mpa.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a film-wrapped tissue assembly package in which a plurality of film-wrapped tissues, each of which is made by wrapping a bundle of folded and stacked tissue paper in a flexible wrapping film, are gusset-wrapped together, and to a packaging material for the film-wrapped tissue assembly package. [Background technology]

[0002] There is a type of tissue paper package known as film-wrapped tissue, in which a tissue paper bundle is wrapped in a flexible plastic packaging film. The most well-known type of film-wrapped tissue is called pocket tissue, which is specialized for portable use, but there are also types called box tissues (hereinafter also called box products), in which a tissue paper bundle is contained in a paper storage box called a carton, and which are used as stationary products or as refills for bundles of box products.

[0003] Film-wrapped tissues used in this way are often sold in the form of a collective package consisting of a number of tissues (e.g., three or five) wrapped in an exterior film, just like boxes. Since the collective packages of film-wrapped tissues used in this way tend to be somewhat bulky, they are generally gusset-packaged with handles for ease of carrying.

[0004] Conventionally, exterior films for collective packaging have been made of petroleum-derived general-purpose resins such as polyethylene and polypropylene, which are inexpensive. However, in recent years, attention has been focused on the global rise in the price of fossil fuels and the problem of environmental pollution caused by plastics leaking into the ocean, and manufacturers and users are increasingly demanding the use of ecological materials and products, such as those that incorporate biomass raw materials or are biodegradable, in film materials. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-058600 A [Patent Document 2] JP 2018-058654 A [Patent Document 3] Patent No. 6721773 Summary of the Invention [Problem to be solved by the invention]

[0006] However, it is known that it is difficult to make plant-derived polyethylene, which is a biomass raw material, have the same physical properties as petroleum-derived polyethylene, even if they are of the same grade, because they contain extremely small amounts of impurities. As a result of the studies conducted by the present inventors, it was found that when an aggregate package is produced by simply replacing the exterior film for the aggregate package with plant-derived polyethylene, problems such as a deterioration in operability during gusset packaging due to an increase in sealing temperature, poor opening formation in the gusset tube due to an increase in blocking degree, and deterioration in color due to an increase in haze value occur.

[0007] Therefore, the main object of the present invention is to provide a film-packaged tissue collective package that can be handled in the same way as conventional collective packages while reducing the environmental burden by using biomass raw materials, and that can be produced with the same operability, and a packaging material for the film-packaged tissue collective package. [Means for solving the problem]

[0008] The means for solving the above problems are as follows. The first method is A film-wrapped tissue assembly package in which a plurality of film-wrapped tissues are gusset-wrapped with an outer film, the gusset-wrapped tissues having a handle portion on the top surface side, The film-wrapped tissue assembly package is characterized in that the exterior film is a biomass film containing 10% by mass or less of biomass raw materials, has a blocking degree of 120 mN or less, and a tensile modulus in the TD direction of 380 to 460 MPa.

[0009] The second method is The film-wrapped tissue assembly package according to the first aspect of the present invention has an exterior film with a haze value of 12% or less.

[0010] The third method is In the film-wrapped tissue assembly package according to the first or second means, the exterior film is a linear low-density polyethylene film containing 3 to 10% by mass of plant-derived polyethylene.

[0011] The fourth measure is A packaging material for a film-wrapped tissue assembly package for packaging a plurality of film-wrapped tissues in a gusset having a handle portion on the top surface side, A packaging material for film-wrapped tissue aggregate packaging, characterized in that it is a biomass film containing 10% by mass or less of biomass raw materials, has a blocking degree of 120 mN or less, and a tensile modulus in the TD direction of 380 to 460 MPa.

[0012] The fifth measure is: The wrapping material for a film-wrapped tissue aggregate wrapper according to the fourth aspect has a haze value of 12% or less.

[0013] The sixth method is: The packaging material for a film-packaged tissue aggregate package according to the fourth or fifth aspect is a linear low-density polyethylene film containing 3 to 10% by mass of plant-derived polyethylene. Effect of the Invention

[0014] According to the present invention, there are provided a film-packaged tissue collective package which uses biomass raw materials, thereby reducing the environmental impact, can be handled in the same way as conventional collective packages, and can be produced with the same operability, and a packaging material for the film-packaged tissue collective package. [Brief description of the drawings]

[0015] [Figure 1] 1 is a perspective view of a film-wrapped tissue assembly package according to the present invention; [Diagram 2] FIG. 2 is a perspective view illustrating a film-wrapped tissue according to the present invention. [Diagram 3] FIG. 2 is a perspective view for explaining a structural example of the film-wrapped tissue according to the present invention. [Figure 4] FIG. 2 is a diagram for explaining a packaging material for a film-wrapped tissue assembly package according to the present invention. [Diagram 5] FIG. 1 is a perspective view illustrating a manufacturing method and structure of a film-wrapped tissue assembly package according to the present invention. [Figure 6] FIG. 2 is a diagram for explaining a method for measuring a blocking degree according to the present invention. [Figure 7] FIG. 2 is a diagram for explaining the heat sealability according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the present invention will be described with reference to the embodiments of Figures 1 to 7. The packaging material for a film-wrapped tissue assembly package according to the present invention will be appropriately described in the description of the embodiment of the film-wrapped tissue assembly package.

[0017] As shown in Fig. 1, the film-wrapped tissue collective package of the present invention (hereinafter also referred to as collective package) is a package in which a bundle 3 of multiple sets of folded tissue paper is wrapped in a flexible packaging film 4, and a plurality of film-wrapped tissues 1 are arranged and gusset-wrapped within an exterior film 14 having a handle portion 45 on the top side. In the illustrated form of collective package 10, the plurality of film-wrapped tissues 1 are gusset-wrapped within the exterior film 14 with the end surface 4A facing the top side with the handle portion 45 and the bottom side opposite the top side, and with the longitudinal direction aligned along the top-to-nadir direction.

[0018] In such a configuration, the number of rows of film-wrapped tissues 1 arranged in a direction perpendicular to the top-to-bottom direction is not particularly limited, but is preferably six rows or less. Also, the illustrated configuration has one row in the top-to-bottom direction, but two rows are also acceptable. Furthermore, although not illustrated, the film-wrapped tissues 1 may be arranged in the exterior film 14 with the top surface 4C facing the top surface where the handle portion 45 is located, and the bottom surface facing the bottom surface opposite the top surface. In such a case, six rows or less are preferable.

[0019] The film-wrapped tissue 1 contained within the exterior film 14 is, for example, a pop-up bundle 3 that has been pillow-wrapped or overlap-wrapped, and as shown in FIG. 2, has a roughly hexahedral shape having an upper surface 4C with perforations 5 for opening that form the removal opening, a lower surface facing the upper surface 4C, and end surfaces 4A and long side surfaces 4B located between the upper surface 4C and the lower surface. Overwrap packaging is a packaging form also called caramel packaging or overlapping packaging, and as shown in Fig. 3, the bundle 3, which is the packaged item, is wrapped in a packaging film 4 so as to form an opening 4Z at both ends in the longitudinal direction, and the overlapping portion 4X in the wrapping direction is bonded by a fusion process or adhesive, and the portion 4Y extending beyond the bundle 3 is folded from the vicinity of the two opposing edges of the bundle end face toward the end face of the bundle 3, and at least the leading edge portions of the approximately triangular or trapezoidal pieces formed in this process are overlapped and bonded by a fusion process or adhesive, and the tube opening 4Z is sealed to form the end face 4A. This overlap packaging has the advantage that the end face 4A is formed by bonding multiple layers of packaging film 4, so that it is highly rigid, difficult to crush, and easy to maintain the approximately rectangular hexahedral shape. The flexible resin packaging film 4 that constitutes the exterior of the film-wrapped tissue 1 is not limited, and any known packaging film can be used.

[0020] The bundle 3 in the film-wrapped tissue 1 is a pop-up bundle of 100 to 240 tissue paper sets, each set consisting of multiple plies. The size of the bundle 3 is not necessarily limited, but is a bundle of 150 sets of two-ply tissue paper sets, approximately 40 to 50 mm in height x 160 to 200 mm in length (width) x 90 to 110 mm in width (width). As shown by this shape, the film-wrapped tissue 1 according to the present invention is different from so-called pocket tissues and the like, which are portable tissues containing about 10 to 12 sets of tissue paper sets and are about 10 mm in height.

[0021] Each tissue paper constituting the bundle 3 has a ply structure in which two to three creped thin sheets are laminated together, and this tissue paper is of the dry type that has been dried. It is not of the so-called wet type that is impregnated with a chemical solution. Note that even among dry type tissue papers, there are those that are impregnated with a chemical solution such as a moisturizing component that increases moisture by absorbing moisture from polyols such as glycerin, and such tissue papers may be used.

[0022] On the other hand, in the gusset packaging according to the present invention, as shown in Fig. 1, the packaged item is contained in a bag-shaped space between the heat-sealed adhesive portions 41, 42 on the top and bottom sides, and in particular, the packaging form has gusset portions 43, 43 between the front surface 46 and the back surface 46. In this gusset packaging, the exterior film 14 has gusset portions 43, 43 formed by opening the side portions 40E, 40E folded in a flat state, and each surface connected to the gusset portion 43. Note that the front surface 46 and the back surface 46 are connected to each gusset portion 43, 43, but the front surface 46 and the back surface 46 are relative to each other, and it is not limited which surface is the front surface.

[0023] The handle portion 45 is formed as an excess portion provided further on the top side than the top side sealing portion 41, which is the top side boundary with the bag portion in which the film-wrapped tissues 1 are contained, in order to improve the portability of the collective package 10. In the illustrated embodiment, one finger hole 47 is formed. When the handle portion 45 has a finger hole 47 formed in this manner, the portability of the collective package is further improved. Note that two or more finger holes 47 may be formed. The shape of the finger hole 47 is also not particularly limited.

[0024] As shown in Figures 4 and 5 in particular, this collective package using gusset packaging is generally produced by folding the sides 40E, 40E of a cylindrical gusset packaging film into the inside of the bag to form a flattened gusset tube 40, heat sealing the top opening as top sealing portion 41 and forming a handle portion 45, then widening the bottom opening 40X of the gusset packaging bag precursor with only the top side sealed, inserting the assembly 1, 1... of film-wrapped tissues 1, which are the packaged items, therethrough, and then sealing the bottom side by an appropriate sealing means such as heat sealing to form the lower sealing portion 42. However, although not shown, the collective package 10 of the present invention may be manufactured by other manufacturing methods, such as a manufacturing method in which the bottom opening of the flattened gusset tube is heat sealed first, and then the top opening of the gusset package bag precursor with only the bottom side sealed is expanded and the film-wrapped tissue assembly, which is the packaged item, is inserted through the opening, or a manufacturing method in which the flattened gusset tube is opened without sealing one end, to open both the top and bottom ends, and the film-wrapped tissue assembly, which is the packaged item, is inserted through either of the openings. Such other manufacturing methods also have advantages.

[0025] Further, an example of a manufacturing method of the collective package according to the present invention will be described. When inserting the film-wrapped tissue 1 into the opening 40X of the precursor gusset packaging bag, a plurality of film-wrapped tissues 1 are arranged so that the end faces 4A and long sides 4B are substantially flush with each other to form a collective package of film-wrapped tissues arranged in a substantially rectangular hexahedron shape. Meanwhile, simultaneously with or after the formation of the collective package, the flattened gusset tube is opened so that the faces that will become the front 46 and the faces that will become the back 46 are separated from each other as described above, and a storage space for the collective package, which is the packaged item, and the opening 40X are formed inside to form a gusset packaging bag precursor. Thereafter, the assembly is pushed into the storage space from the end surface side or the top surface side, and the unsealed top surface side or bottom surface side is sealed by heat sealing to form the collective package 10. The form shown in Fig. 5 is a form inserted from the end surface 4A side. As described above, with regard to heat sealing, there are cases where only one of the top surface side or the bottom surface side is sealed first and then the assembly is inserted, and cases where the assembly is inserted and then the top surface side or the bottom surface side is fused and sealed simultaneously or separately. Also, as in the illustrated form, when the assembly is inserted from the end surface 4A side, it is preferable to have a compression process in which the assembly is compressed from the direction in which the top and bottom surfaces are aligned during insertion so that the individual film-wrapped tissues do not collapse in the collective package, and the assembly enclosed by the exterior film 14 is restrained.

[0026] Since a series of steps from the state of the gusset tube to the formation of the collective package are performed continuously in a short time, it is important that blocking does not occur, particularly in the step of opening the gusset tube 40 and the precursor so as to separate the surface that will become the front 46 from the surface that will become the back 46. Blocking refers to excessive adhesion between the film layers, and if blocking occurs, it becomes difficult to form the opening 40X and the storage space continuously. In addition, in the heat sealing step for sealing the opening in the gusset packaging of the collective package 10, the heat sealing temperature is in the range of about 120 to 140°C, and the heat sealing time is about 1.5 to 3.0 seconds. Furthermore, when the collection of film-wrapped tissues 1 is pushed into the storage space from the opening, the inner surface of the gusset tube 40 rubs against the film-wrapped tissue, so it is necessary to prevent excessive friction and damage to the gusset tube. The packaging film 14 constituting the gusset packaging bag is formed from the packaging material for the film-wrapped tissue collective package according to the present invention. Therefore, the gusset tube 40, the gusset packaging bag precursor, and the film from which these are made are the packaging material for a film-wrapped tissue assembly package according to the present invention.

[0027] In order to solve the problems caused by the above-mentioned unique circumstances of the manufacturing method and the usage mode of the collective package 10 of the present invention, the exterior film 14 and the packaging material for the film-wrapped tissue collective package are distinctive. Note that, although the exterior film 14 will be explained below, the same applies to the packaging material for the film-wrapped tissue collective package.

[0028] The exterior film 14 according to the present invention is a biomass film containing 10% by mass or less of biomass raw materials. It is difficult to make a biomass film containing biomass raw materials have the same physical properties as a petroleum-derived film that does not contain biomass raw materials, but as long as the blending ratio of the biomass raw materials does not exceed 10% by mass, it can be sufficiently used as the exterior film 14 of the collective packaging body 10. Furthermore, a reduction in the environmental load due to the use of biomass raw materials is also achieved. In particular, a biomass film containing biomass raw materials derived from plant raw materials such as sugar cane, potatoes (starch), and corn is preferable. This is more advantageous in terms of environmental load.

[0029] Furthermore, the exterior film 14 is preferably a linear low density polyethylene film (LLDPE) containing 3 to 10 mass % of plant-derived polyethylene, which is a biomass raw material. The density is 0.910 to 0.940 g / cm 3 It is preferable that the outer casing film is a linear low-density polyethylene film containing 3 to 10% by mass of plant-derived polyethylene, which can easily achieve a melting point of 110 to 120°C suitable for gusset packaging, and can also reduce costs. The outer casing film may be a polypropylene film containing biomass-derived polyethylene. However, plant-derived polyethylene is more readily available. Furthermore, the outer casing film may be a polyethylene terephthalate film, a nylon film, a vinylidene chloride film, a single-layer film of an ethylene-vinyl alcohol copolymer, or a laminate film containing these films and appropriately laminated therewith, or a gas barrier film obtained by subjecting these films to a surface treatment such as aluminum deposition.

[0030] On the other hand, the exterior film 14 has a blocking degree of 120 mN or less. Specifically, this is the blocking degree between the inner faces of the exterior film 14, that is, between the inner faces of the front face 46 and the back face 46. If the blocking degree of the exterior film 14 is 120 mN or less, problems during manufacturing in gusset packaging are solved. There is no lower limit and it is sufficient if it is more than 0 mN, but if it is about 100 mN, handling is sufficiently easy.

[0031] Here, the gusset tube according to the present invention is wound into a roll under a certain degree of tension, so that the layers are pressed against each other. Also, during the manufacturing process, the tube may be placed in an environment of about 50° C. The blocking degree according to the present invention is the force required for films to peel off from each other when the films are pressed against each other at an ambient temperature of 50° C. and humidity levels.

[0032] The measurement method is as shown in FIG. 6, and can be performed as follows. First, a measurement sample 14A, which is larger than the size (100 mm×100 mm) of the plane 6A, is placed on a plane plate 60A having a plane 6A of 100 mm×100 mm, and the measurement sample 14A is fixed to the plane plate 60A so that the measurement sample 14A and the plane 6A are perfectly integrated. The measurement sample 14A can be fixed to the plane plate 60A by, for example, adhering the measurement sample 14A to a portion 60P other than the plane of the plane plate 60A with an adhesive tape or a bonding agent. Then, a measurement sample 14B of the same size is placed on the plane measurement sample 14A, and a plane weight plate 60B having a bottom surface 6B of 100 mm×100 mm is placed on the measurement sample 14B, and the measurement sample 14B is fixed to the plane weight plate 60B so that the measurement sample 14B and the bottom surface of the plane weight plate 60B are perfectly integrated. The mass of the flat weight plate 60B is set to 20 to 25 kg so as to provide sufficient pressure assuming pressure contact in a rolled state. This fixation may be performed by fixing the measurement sample 14B to a part other than the bottom surface of the flat weight plate 60B using an adhesive tape or adhesive. Then, the measurement sample 14A and the measurement sample 14B are sandwiched between the flat plate 60A and the flat weight plate 60B and left in an environment of 50°C. A leaving time of 3 to 4 days is sufficient. Thereafter, with the above-mentioned plane 6A and bottom surface 6B in a horizontal state, the flat weight plate 60B to which the measurement sample 14B is fixed is separated from the plane 6A to which the measurement sample 14A is fixed, so that the measurement sample 14A and the measurement sample 14B are peeled off. The force required for the separation is measured. The force required for the peeling is applied at a speed of about 0.05 g / sec. Note that, during the peeling, the force is applied evenly and not to a specific part between the bottom surface 6B and the flat surface 6A. For example, as shown in the figure, a peeling jig is attached to the center (center of gravity) of the flat weight plate 60B, and it is pulled up vertically. It is also desirable to round off the edges 60E of the flat surface 6A and bottom surface 6B of the flat plate 60A and flat weight plate 60B. This makes it difficult for peeling force to be applied to specific areas. As mentioned above, the gusset tube is wound into a roll under a certain amount of tension, and may be placed in an environment of about 50°C during the manufacturing process.The inventors have discovered that although the pressure between each film and the storage conditions in the rolled state vary in detail, the above measurement conditions can be used as indicators for opening the gusset tube during gusset packaging.

[0033] The inventors have also found that the blocking degree is greatly affected by the blending ratio of the biomass raw material, as shown in the following examples. In particular, they have found that when the blending ratio of the biomass raw material exceeds 10%, the blocking degree is not proportional to the blending ratio and varies, and it is assumed that when the blending ratio of the biomass raw material exceeds 10%, the blocking degree becomes unstable due to the homogeneity of the raw material. If the blending ratio of the biomass raw material is 10% or less, it is very easy to achieve a blocking degree of 120 mN or less, which is stable enough to open the gusset tube.

[0034] On the other hand, the exterior film 14 has a tensile modulus in the TD direction of 380 to 460 MPa. If the tensile modulus in the TD direction is within this range, the film package will have an appropriate tensile modulus when gusset-packaged, and the film package will be tighter. In particular, in the gusset packaging, the individual collective packages 10 are manufactured from continuous gusset tubes, so the top and bottom directions are the MD direction (machine direction), and the direction between the gusset parts (side faces) is the TD direction (transverse direction). Therefore, particularly when the film-wrapped tissues 1 are stored in the exterior film 14 with the end surface 4A facing the top and bottom directions as shown in FIG. 1, and particularly when the film-wrapped tissues 1 are compressed in the top and bottom surface directions, the exterior film 14 will be stretched from the inner surface outward in the TD direction, but if the modulus is within the above range, the collective package 10 can adequately maintain a suitable shape.

[0035] Furthermore, it is desirable that the tensile modulus of elasticity in the MD direction of the exterior film 14 is 260 to 310 MPa. When the handle portion 45 of the collective package 10 is held, the exterior film 14 is stretched in the top-to-bottom direction, i.e., in the MD direction. If the modulus is within the above range, the exterior film 14 will not deform excessively even if the package contains about 3 to 12 pieces of film-wrapped tissues 1 and is carried by holding the handle portion 45.

[0036] The tensile modulus in the TD and MD directions is measured based on JIS K 7127 "Test method for tensile properties, Part 3: Test conditions for films and sheets".

[0037] On the other hand, the exterior film 14 desirably has a haze value of 15.0% or less, and more preferably 12.0% or less. If the haze value is 12.0% or less, the film is sufficiently transparent and the contents inside can be easily visually recognized with a clean feeling. Here, the inventors have found that the haze value increases with an increase in the blending ratio of biomass raw materials, but if the blending ratio of biomass raw materials is 10% or less, the above haze value can be achieved. The haze value (HAZE) is measured based on JIS K 7136 "Plastics - Determination of haze of transparent materials".

[0038] On the other hand, it is desirable that the coefficient of dynamic friction of the inner surface of the exterior film 14 is 0.05 to 0.20. If the coefficient of dynamic friction is within this range, the gusset tube 40 can be opened smoothly, and the assembly can be smoothly contained without excessive friction when the assembly is contained. The coefficient of dynamic friction is measured based on JIS K 7125 "Plastics - Films and sheets - Test method for coefficient of friction".

[0039] Furthermore, it is desirable that the exterior film 14 has an electrostatic voltage of 0.35 kV or less. It can be handled in the same way as an exterior film that does not contain biomass raw materials. The electrostatic voltage can be adjusted by using an antistatic agent. The electrostatic voltage is measured based on JIS L 1094 "Test method for electrostatic charge of woven and knitted fabrics."

[0040] Furthermore, the exterior film 14 desirably has a tear strength in the TD direction of 10.0 N or more. In particular, in the case of an assembly package 10 in which the film-wrapped tissues 1 of the overlap-wrapped packaging are stored with the end surface 4A facing the top and bottom directions, the relatively sharp end surface square parts 4t may rub against the exterior film 14 when the assembly is inserted into the storage space. In addition, when the exterior film 14 has a handle part 45 on the top side, when the handle part 45 is held and then placed with the bottom side facing down, the gusset packaging bag made of the exterior film 14 is pulled in the top and bottom directions, and the film-wrapped tissues 1 contained therein may rub against the exterior film 14. In this case, the end surface square parts 4t may particularly rub against the exterior film 14. If the tear strength in the TD direction is 10.0 N or more, the risk of the exterior film 14 tearing is significantly reduced even if such rubbing of the end surface square parts 4t occurs. The tear strength is measured based on JIS K 7128-2 "Plastics - Test method for tear strength of films and sheets, Part 2: Elmendorf tear method."

[0041] Furthermore, in terms of the exterior film 14 constituting the gusset packaging bag, in addition to flexibility and heat sealing properties during packaging, tearability for easy opening when opening, abrasion resistance especially to the end face square portion 4t of the film-wrapped tissue 1 contained therein, and flexibility that does not place excessive strain on the fingers when passing them through the finger holes provided in the handle portion and carrying the bag, it is desirable that the thickness and softness be 10 to 65 μm as measured in accordance with JIS P 8118 (1998), and 5.0 to 50.0 cN as measured based on the handle-o-meter method in accordance with JIS L 1096 (2010) Method E.

[0042] The film-wrapped tissue collective package 10 according to the present invention has an exterior film 14 made of a packaging material for film-wrapped tissue collective packages as described above, and can be manufactured with the same handling and operability as conventional collective packages while reducing the environmental load caused by biomass raw materials. The following provides further explanation with examples. EXAMPLES

[0043] The physical properties of the packaging material for film-packaged tissue aggregate packages (Examples 1 and 2), which is the exterior film according to the present invention, exterior films with an increased blending ratio of biomass raw materials (Comparative Examples 1 to 3), and exterior films made only of petroleum-derived raw materials without biomass raw materials (Conventional Example 1) were measured to examine whether they are suitable for use as exterior films for film-packaged tissue aggregate packages. The biomass raw material was biomass polyethylene derived from plants, and all exterior films were polyethylene films.

[0044] The measured values ​​of the physical properties in the table are as explained in the Detailed Description of the Invention above. Furthermore, the tensile strength in the table was measured based on JIS K 7127 "Testing Methods for Tensile Properties, Part 3: Testing Conditions for Films and Sheets", the tensile elongation was measured based on JIS K 7127 "Testing Methods for Tensile Properties, Part 3: Testing Conditions for Films and Sheets", and the load at 2% elongation was measured based on JIS K 7127 "Testing Methods for Tensile Properties, Part 3: Testing Conditions for Films and Sheets".

[0045] [Table 1]

[0046] As shown in the table, in Examples 1 and 2, in which the blending ratio of biomass raw material was 5% and 10%, the blocking degree was equivalent to that of Conventional Example 1, a petroleum-derived polyethylene film, but in Comparative Example 1, which contained 15% biomass raw material, the blocking degree rose sharply to 491 mN. Furthermore, in Comparative Example 3, in which the blending ratio of biomass raw material was 25%, the blocking degree was lower than in Comparative Example 1, although the blending ratio was higher. In addition, in terms of physical properties mainly related to the elongation of the film, such as tensile strength, tensile elongation, load at 2% elongation, tensile modulus, and tear strength, when the biomass raw material blending ratio is up to 10%, the values ​​are similar to or change proportionally to those of Conventional Example 1, which is derived from petroleum and has a biomass blending ratio of 0%. However, when the biomass raw material blending ratio exceeds 15%, no proportional change is observed and the variation also becomes large. Furthermore, the values ​​tend to deteriorate in proportion to the increase in haze value, electrostatic charge, and biomass blending ratio. Regarding heat sealing properties, the column for thermal gradient seal strength in the table and Fig. 7 show the seal strengths of the conventional example, Examples 1 and 2, and Comparative Example 3, which are graphed, and show that heat sealing is possible for the Examples within the temperature range of 120 to 140 degrees. Furthermore, it can be seen that the heat sealing properties tend to deteriorate as the biomass blending ratio increases. The collective packaging body of the present invention, in which the mixing ratio of biomass raw materials is 10% or less and the blocking degree is 120 mN or less, can be produced with the same handling and operability as conventional collective packaging bodies, while reducing the environmental burden caused by the biomass raw materials. [Explanation of symbols]

[0047] 1...film-wrapped tissue, 3...bundle of tissue paper, 4...wrapping film, 4A...end surface, 4B...long side surface, 4C...top surface, 10...film-wrapped tissue assembly, 14...outer film, 4t...square portion of end surface, 4X...overlapped portion of packaging film, 4Y...extended portion of packaging film, 4Z...tubular opening of packaging film, 5...perforation for opening, 40...gusset tube, 40E...side portion of gusset packaging film in gusset tube form, 40X...bottom opening of gusset packaging bag precursor, 41...top sealing portion, 42...bottom sealing portion, 43...gusset portion, 44...top portion, 45...handle portion, 46...front surface, back surface, 47...finger hole.

Claims

1. A film-wrapped tissue assembly package in which a plurality of film-wrapped tissues are gusset-wrapped with an exterior film, the tissues having a handle portion on the top surface side, The film-wrapped tissue assembly package is characterized in that the exterior film is a linear low-density polyethylene film containing more than 0% by mass and not more than 10% by mass of plant-derived polyethylene, which is a biomass film, and has a blocking degree of 120 mN or less.

2. 2. The film-wrapped tissue assembly according to claim 1, wherein the haze value of the exterior film is 12% or less.

3. 3. The film-wrapped tissue assembly package according to claim 1, wherein the exterior film is a linear low-density polyethylene film containing 3 to 10% by mass of plant-derived polyethylene.

4. A packaging material for a film-wrapped tissue assembly package for packaging a plurality of film-wrapped tissues in a gusset having a handle portion on the top surface side, A packaging material for a film-wrapped tissue assembly package, characterized in that the packaging material is a biomass film that is a linear low-density polyethylene film containing more than 0% by mass and not more than 10% by mass of plant-derived polyethylene, and has a blocking degree of 120 mN or less.

5. 5. The wrapping material for a film-wrapped tissue aggregate wrapper according to claim 4, which has a haze value of 12% or less.

6. The packaging material for a film-packaged tissue aggregate package according to claim 4 or 5, which is a linear low-density polyethylene film containing 3 to 10% by mass of plant-derived polyethylene.

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