Manufacturing method for sanitary tissue paper packaging

Abstract

To manufacture a sanitary tissue paper package in which a laminate of sanitary tissue papers is compactly compressed without impairing quality in use.SOLUTION: This disclosure is a manufacturing method of a sanitary tissue paper package 10 which has a laminated body 11 of sanitary tissue paper and a film packaging material 12 which packs the laminated body 11. The method includes: a wrapping step of wrapping the laminated body 11 in the film packaging material 12; a sealing step of sealing other opening portion other than an unsealed portion 14, in a state where the film packaging material 12 which wrapped the laminated body 11 is provided with the unsealed portion 14 to at least one place; and a hermetically sealing step of sealing the unsealed portion 14 by deaerating air in a package from the unsealed portion 14 so that density of the laminated body 11 becomes 0.3 g / cm3 or more and 0.8 g / cm3 or less.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a sanitary tissue paper package that packages a laminate of sanitary tissue paper in a compressed state.

Background Art

[0002] For the purpose of improving the transportation efficiency of sanitary tissue paper packages and reducing storage space, sanitary tissue paper is packaged compactly. For example, in order to package sanitary tissue paper such as hand towels compactly, a laminate of sanitary tissue paper is compressed with a pull belt or the like on the outlet side of a folding machine (for example, Patent Document 1). In addition, for products such as tissue paper and kitchen paper that can be taken out in a pop-up manner, there are those in which a laminate of sanitary tissue paper is degassed and packaged in a vacuum state (for example, Patent Documents 2 and Patent Document 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a laminate of sanitary tissue paper is compressed with a pull belt or the like, the degree of compression of the laminate is adjusted by adjusting the pressing force of the pull belt. However, if the laminate is compressed too strongly, the sanitary tissue paper may be torn, so there is a limit to the range that can be compressed.

[0005] In addition, there are refillable toilet tissue packages whose proper degree of compression is different from that of a pop-up type toilet tissue package (hereinafter referred to as "pop-up type toilet tissue package") that can be taken out in a pop-up manner. In the refillable toilet tissue package, unlike the pop-up type toilet tissue package, since it is not necessary to consider the ease of taking out the toilet tissue in a pop-up manner, a toilet tissue package compressed more compactly than the pop-up type toilet tissue package is desired. However, even in the case of a refillable toilet tissue package, if it is compressed too much, there is a risk that the quality during use will deteriorate.

[0006] Therefore, an object of the present disclosure is to provide a method for manufacturing a toilet tissue package capable of manufacturing a toilet tissue package in which a laminate of toilet tissue is compactly compressed without impairing the quality during use.

Means for Solving the Problems

[0007] To solve the above problems, a first aspect of the present invention is a method for manufacturing a toilet tissue package having a laminate of toilet tissue and a film packaging material for packaging the laminate, the method including a packaging step of wrapping the laminate with the film packaging material, a sealing step of sealing other opening portions other than the unsealed portion with the film packaging material wrapping the laminate provided with an unsealed portion at at least one location, and a sealing step of degassing air in the package from the unsealed portion and sealing the unsealed portion so that the density of the laminate is 0.3 g / cm , ,

[0009] , 3 ,

[0008] , 3 , , or more and 0.8 g / cm 3 or less.

[0008] A second aspect of the present invention is the method for manufacturing a toilet tissue package according to the first aspect, wherein the sealing step is performed in a vacuum chamber, and the degassing from the unsealed portion in the vacuum chamber is performed in a time of 3 seconds or more and 40 seconds or less.

[0009] A third aspect of the present invention is a method for manufacturing a sanitary tissue paper packaging according to the first aspect, wherein the sealing step is performed in a vacuum chamber, and the pressure in the vacuum chamber is 2000 Pa or more and less than 3000 Pa. [Effects of the Invention]

[0010] According to this disclosure, a sanitary tissue paper packaging can be manufactured by deaerating a laminate of sanitary tissue paper to a predetermined density range, thereby compactly compressing the laminate without compromising its quality during use. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of a sanitary tissue paper packaging manufactured by a manufacturing method according to one embodiment of the present invention. [Figure 2] This is a schematic diagram illustrating the manufacturing process of sanitary tissue paper packaging. [Figure 3] This is a perspective view of a laminate of unpackaged sanitary tissue paper. [Figure 4] This is a perspective view showing the laminated structure wrapped in film packaging material. [Figure 5] Figure 4 is a perspective view showing one end of the film packaging material sealed. [Figure 6] This is an explanatory diagram of laminates and film packaging materials inside a vacuum chamber. [Figure 7] This is a perspective view of a sanitary tissue paper packaging body showing a modified example of the packaging configuration. [Modes for carrying out the invention]

[0012] Hereinafter, one embodiment of the present invention will be described with reference to the drawings, but these are provided for illustrative purposes only and do not limit the present invention. The term "packaged state" means a state in which the laminate of sanitary tissue paper 11 is covered with a film packaging material 12, the inside of the packaging is de-aerated and the laminate 11 is sealed, and the term "unpackaged state" means a state in which the laminate of sanitary tissue paper 11 is not covered with the film packaging material 12. Furthermore, "sealed" means to seal it so that there are no gaps, regardless of the subsequent state (for example, whether or not air enters due to long-term storage).

[0013] Figure 1 is a perspective view of a sanitary tissue paper packaging 10 manufactured by a manufacturing method according to one embodiment of the present invention. In Figure 1, X represents the lamination direction of the laminate 11, Y represents one direction intersecting the lamination direction of the laminate 11 (hereinafter referred to as the "vertical direction"), and Z represents the other direction intersecting the lamination direction of the laminate 11 (hereinafter referred to as the "horizontal direction").

[0014] As shown in Figure 1, the sanitary tissue packaging 10 according to this embodiment is a refillable sanitary tissue packaging 10 for packaging sanitary tissue to be refilled into an empty dispenser (not shown), and the entire laminate of sanitary tissue 11 (hereinafter sometimes simply referred to as "laminated 11") is covered with a film packaging material 12, and the laminate 11 is sealed by at least one seal portion 13 in a de-aeroded state.

[0015] Examples of sanitary tissue paper include paper towels such as tissue paper and hand towels, table napkins, kitchen paper, kitchen towels, and wipers made of paper or nonwoven fabric. The material of the sanitary tissue paper is not particularly limited, but examples include nonwoven fabrics such as meltblown nonwoven fabric, spunlace nonwoven fabric, and composite nonwoven fabrics made by laminating these.

[0016] If the sanitary tissue paper is tissue paper, its basis weight (basis weight of one ply in a 2-ply product) is 9 g / m². 2 More than 17g / m 2 Preferably, it is 9 g / m2 It is more preferable that it is 15 g / m or less, and 10 g / m 2 or more is more preferable, and 13 g / m 2 or more and 13 g / m 2 or less is even more preferable. Further, when the sanitary tissue paper is a hand towel, its basis weight (basis weight of one ply in a 2-ply product) is 14 g / m 2 or more and 26 g / m 2 or less is preferable, and 16 g / m 2 or more and 24 g / m 2 or less is more preferable, and 18 g / m 2 or more and 22 g / m 2 or less is even more preferable.

[0017] The geometric mean GMT (Geometric Mean Tensile strength) of the dry machine direction tensile strength DMD (Dry Machine Direction tensile strength) and the dry cross direction tensile strength DCD (Dry Cross Direction tensile strength) of the sanitary tissue paper is preferably 1 N / 25 mm or more and 5 N / 25 mm or less, more preferably 1.3 N / 25 mm or more and 4.5 N / 25 mm or less, and even more preferably 1.6 N / 25 mm or more and 4.0 N / 25 mm or less in the case of tissue paper. In the case of a hand towel, it is preferably 5 N / 25 mm or more and 30 N / 25 mm or less, more preferably 7 N / 25 mm or more and 22 N / 25 mm or less, and even more preferably 9 N / 25 mm or more and 18 N / 25 mm or less. By making the GMT within the above range, when packaged, the sanitary tissue paper sheet is less likely to wrinkle and has sufficient softness. Also, it has an appropriate degree of tear resistance suitable for practical use. Note that the tensile strength can be measured in accordance with JIS P 8113. Also, the above measurement of the tensile strength is carried out after keeping the sanitary tissue paper in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (23 ± 1°C, 50 ± 2%RH).

[0018] The laminate 11 is formed by stacking multiple sheets of sanitary tissue paper, each folded. The method of folding the sanitary tissue paper is not particularly limited, and methods such as bi-fold, C-fold, V-fold, Z-fold can be applied, with C-fold or V-fold being particularly preferred. The laminate 11 is preferably formed by folding and stacking 2-ply sanitary tissue paper sheets as one set, with the number of sets preferably being 100 to 2000, more preferably 200 to 1500, and even more preferably 500 to 1000. The number of bundles (clips) of the laminate 11 packaged in the sanitary tissue paper packaging 10 is preferably 1 to 15, and more preferably 2 to 10. The number of sets of the laminate 11 refers to the number of sets of laminate 11 packaged in the sanitary tissue paper packaging 10, and if multiple bundles (clips) of laminate 11 are packaged, it refers to the total number of sets of the multiple bundles of laminate 11.

[0019] The density of the laminate 11 (density of the laminate 11 in its packaged state (after compression)) is 0.3 g / cm³. 3 More than 0.8g / cm 3 Preferably, it is 0.4 g / cm³. 3 More than 0.7g / cm 3 The following is more preferable. The density of the laminate 11 can be calculated by the following formula (1) based on the mass of the laminate 11 and the size (width, depth, height) of the laminate 11 in its packaged state. The mass of the laminate 11 can be calculated by subtracting the mass of the film packaging material 12 from the mass of the sanitary tissue packaging 10 in its packaged state. The mass of the sanitary tissue packaging 10 and the mass of the film packaging material 12 are measured after being held in equilibrium under the temperature and humidity conditions specified in JIS P 8111 (23±1℃, 50±2%RH) (for example, measured with an electronic balance). Density of laminate 11 (g / cm³) 3 ) = Mass of laminate 11 (g) / (Width of laminate 11 (cm) × Depth of laminate 11 (cm) × Height of laminate 11 (cm)) ... (1)

[0020] The film packaging material 12 is a packaging material that packages the laminate 11, for example, by pillow packaging. Since the sanitary tissue packaging 10 is a sanitary tissue packaging 10 for refilling, the film packaging material 12 is not provided with an opening (perforation, etc.) that allows the laminate 11 to be removed in a pop-up manner. The film packaging material 12 is formed by creating a sheet into a cylindrical shape that extends in the longitudinal direction, overlapping the ends that extend along the longitudinal direction and sealing them linearly (for example, by heat sealing or ultrasonic sealing), and further sealing both openings in the longitudinal direction linearly. That is, in this embodiment, the sealing portion 13 has a first sealing portion 13a that overlaps the ends that extend along the longitudinal direction when the film packaging material 12 is formed into a cylindrical shape and seals them linearly, and a second sealing portion 13b and a third sealing portion 13c that linearly seal the two openings when the film packaging material 12 is formed into a cylindrical shape. The location and number of the sealing portions 13 are not limited to those shown, as long as the film packaging material 12 can be adhered to the laminate 11 in a way that allows it to be sealed. For example, the laminate 11 may be placed between folded film packaging material 12, and the three sides other than the folded portion of the film packaging material 12 may be sealed (see Figure 7).

[0021] The film packaging material 12 may be formed as a single layer or as a multi-layer structure. The material of the film packaging material 12 is preferably a thermoplastic resin (so-called plastic) suitable for recycling. Specifically, examples of conventionally known thermoplastic resins include polyethylene, polypropylene such as biaxially oriented polypropylene (OPP) and unoriented polypropylene (CPP), polyester, nylon (polyamide), polycarbonate, polystyrene, and polyvinyl chloride. Among these, polypropylene and nylon (polyamide) are preferred, and nylon-based polyamide resins (nylon-6, nylon-6,6, nylon-6,10, nylon-6,12, etc.) are particularly preferred. Laminated films such as OPP / CPP and nylon / PE (LLDPE) can also be used. Among these, nylon / PE (LLDPE) is preferred in order to maintain a degassed state.

[0022] The thickness of the film packaging material 12 is preferably 10 μm or more and 80 μm or less, and more preferably 30 μm or more and 60 μm or less. The thickness of the film packaging material 12 is measured in accordance with JIS K 7130.

[0023] Next, a method for manufacturing the sanitary tissue paper packaging 10 will be described.

[0024] Figure 2 is a schematic diagram illustrating the manufacturing process of the sanitary tissue paper packaging 10. Figure 3 is a perspective view of the laminated sanitary tissue paper 11 in its unpackaged state. Figure 4 is a perspective view showing the laminated 11 wrapped in film packaging material 12. Figure 5 is a perspective view showing one end of the film packaging material 12 in Figure 4 sealed. Figure 6 is an explanatory diagram of the laminated 11 and film packaging material 12 inside the vacuum chamber 2. The white arrows in Figures 2, 4 to 6 indicate the direction in which the product is transported.

[0025] As shown in Figure 2, in this manufacturing method, the film packaging material 12 is wound around a shaft in a continuous sheet state to be prepared as a roll body 12a. A continuous sheet state means that the film packaging material 12 is in a sheet state that has not been individually cut. In addition, the step of manufacturing a laminate 11 by stacking multiple sheets of sanitary tissue paper in a folded state is omitted.

[0026] The manufacturing method according to this embodiment is a method for manufacturing a sanitary tissue paper package 10 having a laminate 11 of sanitary tissue paper and a film packaging material 12 for packaging the laminate 11, and includes a packaging step, a sealing step and a sealing step.

[0027] The packaging process involves wrapping the laminate 11 with film packaging material 12. As shown in Figures 2 and 3, in the packaging process, the film packaging material 12 is fed from the roll body 12a toward the transport path 1 through which the unpackaged laminate 11 (see Figure 3) is transported, and the laminate 11 is wrapped with the film packaging material 12. In this embodiment, the laminate 11 is wrapped from above with the film packaging material 12 sheet, and the film packaging material 12 sheet is formed into a cylindrical shape extending in the longitudinal direction (the transport direction of the laminate 11).

[0028] The sealing process is a process in which, in the packaging process, the film packaging material 12 that encloses the laminate 11 is sealed in at least one place, leaving an unsealed portion 14, and sealing the other openings other than the unsealed portion 14. In the packaging process, the laminate 11 is wrapped from above with the film packaging material 12 sheet, and when the film packaging material 12 sheet is formed into a cylindrical shape extending in the longitudinal direction (the conveying direction of the laminate 11), the ends of the film packaging material 12 sheet extending along the longitudinal direction on the lower surface side of the laminate 11 are overlapped and sealed linearly by a sealing device (not shown) (for example, heat sealing or ultrasonic sealing). The portion that is sealed at this time becomes the first sealed portion 13a. In other words, in this embodiment, part of the sealing process is performed almost simultaneously with the packaging process. After that, as shown in Figures 2, 4, and 5, the cylindrical film packaging material 12 that extends in a long length in the conveying direction with the laminate 11 inside is cut to individual product unit lengths (see Figure 4). Then, with one end of the film packaging material 12 (in this embodiment, the upstream side in the conveying direction) that encloses the laminate (not shown) downstream of the cutting position (the position indicated by arrow c in Figure 4) in the conveying direction, an unsealed portion 14 is left open. At this point, the other end of the film packaging material 12 (in this embodiment, the position indicated by the dashed-dot line 15 downstream in the conveying direction in Figure 4) that encloses the laminate 11 upstream of the cutting position in the conveying direction is completely sealed by the sealing device 3 (see Figure 2). The sealed portion of the other end of the film packaging material 12 (the position indicated by the dashed-dot line 15 in Figure 4) becomes the second sealed portion 13b, as shown in Figure 5. The timing of cutting the film packaging material 12 to the individual lengths of the product unit and the timing of completely sealing the other end of the cut cylindrical film packaging material 12 may be approximately the same or different. Furthermore, in this embodiment, a portion of the sealing process was performed almost simultaneously with the packaging process, but this is not limited to this, and the sealing process may be performed separately from the packaging process after it.

[0029] The sealing process is performed when the density of the laminate 11 is 0.3 g / cm³. 3 More than 0.8g / cm 3 The following is preferably 0.4 g / cm³ 3 More than 0.7g / cm3 The process involves degassing the air inside the packaging from the unsealed portion 14 of the film packaging material 12, and then sealing the unsealed portion 14 to create an airtight seal. At this time, the portion of the film packaging material 12 that has been sealed from the unsealed portion 14 becomes the third sealed portion 13c. As shown in Figures 2 and 6, in this embodiment, the sealing process is performed in a vacuum chamber 2 in which the internal pressure can be adjusted to a vacuum (reduced pressure) state. The pressure inside the vacuum chamber 2 is preferably 2000 Pa or more and less than 3000 Pa. The pressure inside the vacuum chamber 2 can be measured by reading the gauge pressure value of the vacuum chamber 2. The density of the laminate 11 is set to a desired value (0.3 g / cm³). 3 More than 0.8g / cm 3 As a method to achieve the following values, for example, the degassing time required for the density of the laminate 11 to reach the desired value can be measured (or calculated) in advance through experiments or simulations, and degassing can be performed for this measured (or calculated) time. Degassing from the unsealed portion 14 of the film packaging material 12 in the vacuum chamber 2 is preferably performed for a time of 3 seconds to 40 seconds, more preferably 5 seconds to 35 seconds, and even more preferably 10 seconds to 30 seconds. In the sealing process, the air inside the packaging is degassed from the unsealed portion 14 of the film packaging material 12, and the density of the laminate 11 is 0.3 g / cm³. 3 More than 0.8g / cm 3 In the following state, the unsealed portion 14 is sealed and sealed by the sealing device 4 (see Figure 2). Note that in Figure 6, the sealing device 4 is not shown.

[0030] In the manufacturing method of the sanitary tissue paper packaging 10 according to this embodiment, the density of the laminate 11 is within a predetermined range (0.3 g / cm³). 3 More than 0.8g / cm 3 The laminate 11 is degassed and packaged with film packaging material 12 so that it has a density as shown below. This suppresses the deterioration of the texture (feel, texture, etc.) of the sanitary tissue paper after opening and the shape retention of the laminate 11, thereby suppressing a decline in product quality. For example, if the density of the laminate 11 is 0.3 g / cm³ 3If the density is lower, the laminate 11 may move inside the film packaging material 12 and lose its shape. Also, if the density of the laminate 11 is 0.8 g / cm³, 3 If the density exceeds this limit, the laminate 11 may collapse due to compression and become difficult to restore, potentially impairing the texture of the sanitary tissue paper during use. The density of the laminate 11 is 0.4 g / cm³. 3 More than 0.7g / cm 3 The following is more preferable:

[0031] Furthermore, by setting the internal pressure of the sanitary tissue packaging 10 to between 2000 Pa and 3000 Pa, it is possible to suppress the deterioration of the texture (feel, texture, etc.) of the sanitary tissue after opening and the shape retention of the laminate 11. For example, if the internal pressure is lower than 2000 Pa, the laminate 11 may collapse due to compression and become difficult to restore, potentially impairing the texture of the sanitary tissue during use, and also increasing equipment and energy costs. On the other hand, if the internal pressure is higher than 3000 Pa, the laminate 11 may move inside the film packaging material 12, potentially causing it to lose its shape and resulting in poor compressibility.

[0032] Furthermore, by degassing the unsealed portion 14 of the film packaging material 12 within the vacuum chamber 2 for a time of 3 seconds to 40 seconds, the laminate 11 can be compressed compactly while suppressing a decrease in the shape retention of the laminate 11. For example, if the degassing time is less than 3 seconds, the degassing is insufficient and the laminate 11 cannot be compressed compactly. On the other hand, if the degassing time is longer than 40 seconds, the density of the laminate 11 becomes too high, causing it to collapse and making it difficult to restore its shape.

[0033] Thus, according to this embodiment, by deaerating the laminated tissue paper 11 to a predetermined density range, a compactly compressed sanitary tissue paper package 10 can be manufactured without compromising its quality during use.

[0034] In this embodiment, the laminate 11 is packaged in pillow packaging with film packaging material 12, but the invention is not limited to this. Figure 7 is a perspective view of a sanitary tissue paper packaging 10 showing a modified packaging configuration. For example, as shown in Figure 7, the film packaging material 12 may package the laminate 11 by three-side seal packaging, in which three directions intersecting the lamination direction of the laminate 11 are sealed by seal portions 13. In this case, during the sealing process, one of the three seal portions 13 may be left open as an unsealed portion 14, while the remaining two portions are sealed.

[0035] Furthermore, in this embodiment, one laminate 11 is wrapped with film packaging material 12, but the invention is not limited to this. For example, multiple laminates 11 may be arranged in a direction intersecting the lamination direction (for example, the Z direction) and then wrapped with film packaging material 12.

[0036] Although the present invention has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can naturally be modified as appropriate without departing from the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on these embodiments are of course included in the scope of the present invention. [Examples]

[0037] The present invention will be described in detail below with reference to examples. However, the present invention is not limited in any way to the examples shown below.

[0038] Sanitary tissue paper packaging bodies were prepared for Examples 1 to 17 and Comparative Examples 1 to 5. The sanitary tissue paper packaging bodies of Examples 1 to 17 and Comparative Examples 1 to 5 differ in at least one of the following: the number of tissue paper layers, the thickness of the film packaging material (hereinafter sometimes referred to as "film"), the material of the film, the density of the laminate, the difference in circumference, and the degassing pressure.

[0039] In Examples 1 to 17 and Comparative Examples 1 to 5, the following physical properties and dimensions of the prepared sanitary tissue paper packaging were measured after being held in equilibrium under the temperature and humidity conditions specified in JIS P 8111 (23±1℃, 50±2%RH).

[0040] The basis weight, sheet thickness, number of plies per sheet of sanitary tissue paper (hereinafter simply referred to as "sheet"), folding shape (folding method), number of stacks of laminates, and size (perimeter) of the unpackaged laminates were standardized for Examples 1-17 and Comparative Examples 1-5.

[0041] Sanitary tissue paper is standardized to tissue paper, and the basis weight of the sheet is measured according to JIS P 8147, at 10.5 g / m². 2 It was standardized to this.

[0042] The sheet thickness was measured using a thickness gauge (Ozaki Seisakusho's dial thickness gauge "PEACOCK") and standardized to 0.55 mm / 10 ply. The measurement conditions were a measuring load of 250 gf and a probe diameter of 30 mm. The sample was placed between the probe and the measuring stand, and the gauge was read when the probe was lowered at a speed of 1 mm or less per second. Each measurement was performed with 10 single-ply sheets stacked together, and the measurement was repeated 10 times, with the measurement results averaged.

[0043] The number of plies per set of sanitary tissue paper has been standardized to 2-ply.

[0044] The folding shape of the sanitary tissue paper was standardized to a V-fold.

[0045] The number of bundles in the laminated structure was standardized to three.

[0046] The film thickness was measured according to JIS K 7130.

[0047] The density of the laminate (density of the laminate 11 in its packaged state) was calculated using the above formula (1) based on the mass of the laminate and the size of the laminate in its packaged state (width, depth, height).

[0048] The perimeter difference is the difference in perimeter of the film packaging material compared to the perimeter of the laminate in its unpackaged state. Here, the longitudinal perimeter of the laminate 11 and the film packaging material 12 refers to the perimeter with the transverse direction (Z) as the axis, and the transverse perimeter refers to the perimeter with the longitudinal direction (Y) as the axis. The longitudinal perimeter difference is the value obtained by subtracting the longitudinal perimeter of the laminate in its unpackaged state from the longitudinal perimeter of the film packaging material, and the transverse perimeter difference is the value obtained by subtracting the transverse perimeter of the laminate in its unpackaged state from the transverse perimeter of the film packaging material.

[0049] The degassing pressure was determined by reading the gauge pressure (at the end of degassing) value, which indicates the pressure inside the vacuum chamber 2 of the vacuum packaging device.

[0050] Then, between Examples 1-17 and Comparative Examples 1-5, 30 panelists identified defects in the following seven items (film wrinkles, shape retention of contents (laminated material), quality of contents, sheet warping, laminate collapse, film blistering, and film warping), and performed a sensory evaluation on a 5-point scale based on the number of panelists who perceived defects. The details of each evaluation are as follows. 5: Outstandingly superior 4: Excellent 3: Excellent 2: Slightly inferior 1: Inferior

[0051] The wrinkle condition of the film was evaluated on a 5-point scale by visually observing the numerous fine wrinkles appearing on the surface of the tissue paper packaging, as well as the condition of large wrinkles covering one side of the tissue paper packaging. Fewer wrinkles resulted in a rating closer to the highest score of 5, while more wrinkles resulted in a rating closer to the lowest score of 1. The evaluation criteria are as follows: 5. When "Many wrinkles occur" is reported by one person or less. 4: When 2 to 3 people report "frequent wrinkle development". 3: When 4 to 5 people report "frequent wrinkle development". 2: When 6 to 7 people report "frequent wrinkle development". 1: When "Many wrinkles occur" is reported by 8 or more people.

[0052] The shape retention of the contents was evaluated on a 5-point scale by visually observing whether the outer shape (laminated structure) of the sanitary tissue packaging was maintained as a rectangular prism. The less the contents deformed from the rectangular prism, the closer the evaluation approached the highest rating of 5, and the more the contents deformed from the rectangular prism, the closer the evaluation approached the lowest rating of 1. The evaluation criteria are as follows: 5: When "the collapse from the rectangular prism is significant" is observed by one person or less. 4: When there are 2 to 3 people who say "The cuboid collapses significantly." 3: When there are 4 to 5 people, the "collapse from the rectangular prism is significant" 2: When "the collapse from the rectangular prism is significant" is observed by 6 to 7 people. 1: When there are 8 or more people who say "The collapse from the rectangular prism is significant".

[0053] The quality of the contents was evaluated on a 5-point scale by observing whether the separation and texture of the sheets were maintained after opening the sanitary tissue packaging. The closer the evaluation was to the highest rating of 5, the better the separation and texture of the sheets were maintained after opening, and the closer it was to the lowest rating of 1, the worse the separation and texture of the sheets were. The evaluation criteria are as follows: 5. When "the sheet is not separated properly or has a poor texture" is reported by one person or less. 4: "Poor condition of the sheet separation or texture" when there are 2 to 3 people. 3: "Poor separation or texture of the sheets" when there are 4 to 5 people. 2: "Poor separation or texture of the sheets" when there are 6 to 7 people 1: When there are 8 or more people who say "the separation of the seats or the texture is poor".

[0054] The degree of sheet warping was evaluated on a 5-point scale by visually observing the deformation of the laminate. Less sheet warping corresponds to a rating of 5 (the highest rating), while greater warping corresponds to a rating of 1 (the lowest rating). The evaluation criteria are as follows: 5. When "the seat is very wavy" is observed by one person or less. 4: "The seat is very wavy" when there are 2-3 people. 3: "The seats are very wavy" when there are 4 to 5 people. 2: "The seats are very wavy" when there are 6 to 7 people. 1: When the "seat is very wavy" is observed by 8 or more people.

[0055] Lamination collapse was evaluated on a 5-point scale by observing the alignment of the laminate in the thickness direction. Less collapse corresponds to a rating of 5 (the highest rating), while greater collapse corresponds to a rating of 1 (the lowest rating). The evaluation criteria are as follows: 5: When "Severe collapse of the layered structure" is reported by one person or less. 4: When "the layer collapse is significant" is observed by 2 to 3 people. 3: When "the layer collapse is significant" is observed by 4 to 5 people. 2: When "the layer collapse is significant" is observed by 6 to 7 people. 1: When "the layer collapse is significant" occurs in 8 or more people.

[0056] The film bulging was evaluated on a 5-point scale by visually observing the degree of bulging on the flat (surface) surface of the sanitary tissue paper packaging. The smaller the bulging on the flat surface of the sanitary tissue paper packaging, the closer it is to the highest rating of 5, and the larger the bulging on the flat surface of the sanitary tissue paper packaging, the closer it is to the lowest rating of 1. The evaluation criteria are as follows: 5. When the "flat surface of the sanitary tissue paper packaging is significantly bulging" is observed by one person or less. 4. "The flat surface of the sanitary tissue packaging is significantly bulging" when there are 2 to 3 people. 3: When the flat surface of the sanitary tissue paper packaging is significantly bulging, and there are 4 to 5 people present. 2: When the flat surface of the sanitary tissue paper packaging is significantly bulging, and there are 6 to 7 people. 1: When the flat surface of the sanitary tissue paper packaging is significantly bulging, and there are 8 or more people.

[0057] Film warping was evaluated on a 5-point scale by visually observing the degree of sagging of the film in the sanitary tissue packaging. The less sagging the film, the closer it approached the highest rating of 5, and the more sagging the film, the closer it approached the lowest rating of 1. The evaluation criteria are as follows: 5. When "the film sags significantly" is reported by one person or less. 4: When 2 to 3 people have "significant film sagging". 3: When 4 to 5 people have the response "The film is sagging a lot". 2: When 6 to 7 people report "the film is sagging significantly". 1: When there are 8 or more people who say "The film is sagging a lot."

[0058] (Example 1) In the sanitary tissue paper packaging of Example 1, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 55 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0059] (Example 2) In Example 2, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 10 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0060] (Example 3) In the sanitary tissue paper packaging of Example 3, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was set to 80 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was set to 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0061] (Example 4) In the sanitary tissue paper packaging of Example 4, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 30 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0062] (Example 5) In the sanitary tissue paper packaging of Example 5, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the vertical direction and 20 mm in the horizontal direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0063] (Example 6) In the sanitary tissue paper packaging of Example 6, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2950 Pa, and the density of the laminate after compression was 0.32 g / cm³. 3 That's what I decided.

[0064] (Example 7) In the sanitary tissue paper packaging of Example 7, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2000 Pa, and the density of the laminate after compression was 0.79 g / cm³. 3 That's what I decided.

[0065] (Example 8) In the sanitary tissue paper packaging of Example 8, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2800 Pa, and the density of the laminate after compression was 0.40 g / cm³. 3 That's what I decided.

[0066] (Example 9) In the sanitary tissue paper packaging of Example 9, the number of layers of sanitary tissue paper in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2600 Pa, and the density of the laminate after compression was 0.60 g / cm³. 3 That's what I decided.

[0067] (Example 10) In the sanitary tissue paper packaging of Example 10, the number of sanitary tissue paper layers in the laminate was set to 100. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.70 g / cm³. 3 That's what I decided.

[0068] (Example 11) In the sanitary tissue paper packaging of Example 11, the number of sanitary tissue paper layers in the laminate was set to 1500. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.62 g / cm³. 3 That's what I decided.

[0069] (Example 12) In the sanitary tissue paper packaging of Example 12, the number of sanitary tissue paper layers in the laminate was set to 200. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.68 g / cm³. 3 That's what I decided.

[0070] (Example 13) In the sanitary tissue paper packaging of Example 13, the number of sanitary tissue paper layers in the laminate was set to 1000. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.62 g / cm³. 3 That's what I decided.

[0071] (Example 14) In the sanitary tissue paper packaging of Example 14, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -95 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2000 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0072] (Example 15) In the sanitary tissue paper packaging of Example 15, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 190 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0073] (Example 16) In the sanitary tissue paper packaging of Example 16, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was a laminate of OPP and CPP, and the film thickness was set to 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the vertical direction and 20 mm in the horizontal direction. The degassing pressure during compression of the sanitary tissue paper packaging was set to 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0074] (Example 17) In the sanitary tissue paper packaging of Example 17, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was a laminate of OPP and CPP, and the film thickness was set to 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the vertical direction and 20 mm in the horizontal direction. The degassing pressure during compression of the sanitary tissue paper packaging was set to 2800 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0075] (Comparative Example 1) In Comparative Example 1, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 9 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0076] (Comparative Example 2) In Comparative Example 2, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 100 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.65 g / cm³. 3 That's what I decided.

[0077] (Comparative Example 3) In Comparative Example 3, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 3200 Pa, and the density of the laminate after compression was 0.28 g / cm³. 3 That's what I decided.

[0078] (Comparative Example 4) In Comparative Example 4, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was nylon-based, and the film thickness was 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the longitudinal direction and 20 mm in the transverse direction. The degassing pressure during compression of the sanitary tissue paper packaging was 2500 Pa, and the density of the laminate after compression was 0.82 g / cm³. 3 That's what I decided.

[0079] (Comparative Example 5) In Comparative Example 5, the number of sanitary tissue paper layers in the laminate was set to 800. The film material was a laminate of OPP and CPP, and the film thickness was set to 60 μm. The difference in perimeter of the film packaging material compared to the unpackaged laminate was -30 mm in the vertical direction and 20 mm in the horizontal direction. The degassing pressure during compression of the sanitary tissue paper packaging was 1800 Pa, and the density of the laminate after compression was 0.84 g / cm³. 3 That's what I decided.

[0080] The results for Examples 1 to 17 are shown in Table 1, and the results for Comparative Examples 1 to 5 are shown in Table 2.

[0081] [Table 1]

[0082] [Table 2]

[0083] As shown in Tables 1 and 2 above, the density of the laminate is 0.3 g / cm³. 3 More than 0.8g / cm 3 It was confirmed that the following measures can suppress the deterioration of the quality of the contents (texture of the sanitary tissue after opening) and the shape retention of the laminate.

[0084] Furthermore, it was confirmed that maintaining the internal pressure of the sanitary tissue packaging between 2000 Pa and 3000 Pa suppresses the deterioration of the quality of the contents (texture of the sanitary tissue after opening) and the shape retention of the laminate.

[0085] Therefore, according to the manufacturing method of this disclosure, a sanitary tissue packaging 10 can be manufactured by compactly compressing a laminate 11 of sanitary tissue without impairing its quality during use. [Explanation of symbols]

[0086] 2: Vacuum Chamber 10: Sanitary tissue paper packaging 11: Laminate 12: Film packaging materials 14: Unsealed section

Claims

1. A method for manufacturing a sanitary tissue paper packaging comprising a laminate of sanitary tissue paper and a film packaging material for packaging the laminate, A packaging step of wrapping the laminate with the film packaging material with a thickness of 10 μm or more and 80 μm or less, A sealing step in which the film packaging material enclosing the laminate is sealed, leaving at least one unsealed portion, and sealing the other openings other than the unsealed portion. The density of the laminate is 0.3 g / cm³. ３ 0.8g / cm or more ３ The following includes a sealing step of degassing the unsealed portion by removing air from the packaging and sealing the unsealed portion: A method for manufacturing a sanitary tissue paper packaging, characterized by the following features.

2. The sealing process is carried out in a vacuum chamber. Degassing from the unsealed portion within the vacuum chamber shall be performed for a period of 3 seconds to 40 seconds. A method for producing a sanitary tissue paper packaging according to claim 1.

3. The sealing process is carried out in a vacuum chamber. The pressure inside the vacuum chamber is between 2000 Pa and less than 3000 Pa. A method for producing a sanitary tissue paper packaging according to claim 1.

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