Search

JP-7857381-B2 - Roll products

JP7857381B2JP 7857381 B2JP7857381 B2JP 7857381B2JP-7857381-B2

Inventors

  • 佐藤 光
  • 大岡 康伸
  • 藤田 祐樹
  • 大篭 幸治

Assignees

  • 日本製紙クレシア株式会社

Dates

Publication Date
20260512
Application Date
20241210

Claims (7)

  1. A roll product in which a long sheet of paper is wound into a roll and then packaged in a gusseted bag, The gusseted bag comprises a storage section for storing the roll, an intermediate section rising upward from the upper end of the storage section, gusseted sections located on both sides in the width direction of the storage section and the intermediate section, a handle section rising upward from the top of the intermediate section, and a printed section provided on the surface of the storage section and/or the gusseted section. The gusseted bag is made up of a resin film, The aforementioned resin film contains biomass-derived raw materials in an amount of 1% to 75% by mass of the total raw materials, and is made solely of polyethylene. The Young's modulus of the resin film in the TD direction is 150 MPa or more and 600 MPa or less. A roll product in which the printing area ratio in the gusset portion is 20% or more and 95% or less, and the gusset ratio is 30% or more and 95% or less.
  2. The roll product according to claim 1, wherein the coefficient of dynamic friction of the unprinted inner surface of the gusseted bag is 0.01 or more and 0.5 or less.
  3. The roll product according to claim 1 or 2, wherein the ratio of the area of the printed portion to the total surface area of the gusset bag excluding the handle portion is 20% or more.
  4. The roll product according to any one of claims 1 to 3 , wherein the thickness of the resin film is 20 μm or more and 60 μm or less.
  5. The roll product according to any one of claims 1 to 4 , wherein the Young's modulus of the resin film in the MD direction is 100 MPa or more and 400 MPa or less.
  6. The roll product according to any one of claims 1 to 5 , wherein the coefficient of dynamic friction of the non-printed portion on the surface of the gusset bag where the printed portion is not formed is 0.01 or more and 0.50 or less.
  7. The roll product according to any one of claims 1 to 6 , wherein the roll is a toilet roll or a kitchen towel roll.

Description

This invention relates to roll products. Many commercially available roll products, such as toilet paper rolls and kitchen towel rolls, consist of long sheets of paper wound into rolls and packaged within gusseted packaging. Gusseted packaging involves storing the roll in a columnar packaging bag made of resin film, with the top portion remaining uncovered. At the remaining top portion of the packaging bag, one opposing resin film is folded inward, while the upper ends of the other opposing resin film are welded together. In line with current environmental trends, attempts are being made to use environmentally friendly biomass film as the resin film constituting the packaging bag in gusseted packaging. Biomass film refers to a resin material obtained by replacing part or all of a petroleum-derived resin, which is polymerized from petroleum-based monomers synthesized from fossil fuels such as petroleum, with a biomass-derived resin, which is polymerized from plant-based monomers synthesized from plants such as corn and sugarcane, or from a resin material obtained by polymerizing petroleum-based monomers and plant-based monomers. Various proposals have been made regarding biomass resins. Patent Document 1 discloses a method for producing an ethylene-butylene copolymer (Claim 1), in which 1-butylene is synthesized from plant raw materials via ethanol, ethylene, acetaldehyde, 1-butanol, 3-hydroxybutanal, crotonaldehyde, 1-butanol, and a mixture of butylene isomers (1-butylene and 2-butylene), and then ethylene and 1-butylene are polymerized to obtain a renewable, naturally derived ethylene-butylene copolymer containing 100% carbon. According to Patent Document 1, an ethylene-butylene copolymer synthesized from naturally derived carbon-containing materials is provided. Patent Document 2 discloses a resin film comprising a resin composition containing a biomass-derived polyolefin obtained by polymerizing monomers containing biomass-derived ethylene and α-olefin, and a fossil fuel-derived polyolefin obtained by polymerizing fossil fuel-derived ethylene and/or α-olefin monomers, wherein the biomass-derived or fossil fuel-derived α-olefin is butylene, hexene, or octene, and in the resin composition, the content of biomass-derived ethylene is 5% by mass or more of the total resin composition, and the density of the resin composition is 0.91 g/ cm³ or more and 0.96 g/ cm³ or less. According to Patent Document 2, a resin film made of a resin composition containing a carbon-neutral polyolefin using biomass-derived ethylene is provided (paragraph 0022). Patent No. 5551605Patent No. 6020975 This is a schematic perspective view showing the external configuration of a roll product according to an embodiment of the present invention.Figure 1 is a schematic perspective view showing the external configuration of the rolls packaged within the roll product shown.This is a schematic diagram illustrating the mechanism by which blocking occurs in caset packaging. (a) and (b) are schematic perspective views showing the caset packaging process, and (c) and (d) are schematic horizontal cross-sectional views of the gusset portion.This is a schematic horizontal cross-sectional view illustrating how to determine the gusset ratio in the gusset section.This is a schematic horizontal cross-sectional view illustrating defects that occur depending on the gusset ratio. (a) shows the case when the gusset ratio is within the specified range, (b) shows the case when the gusset ratio is less than 20%, and (c) shows the case when the gusset ratio exceeds 95%. <Roll products> Figure 1 shows a roll product 1 as a gusseted package according to this embodiment. Figure 2 shows a roll 10 packaged inside the roll product 1. Specific examples of the roll 10 include toilet rolls, kitchen towel rolls, etc. Figures 4 and 5 illustrate the gusset ratio. As shown in Figure 1, the roll product 1 of this embodiment consists of four rolls 10, each made by winding a long paper sheet into a roll, packaged in a gusseted packaging bag made of an environmentally friendly resin film. The number of rolls 10 packaged in the gusseted packaging bag is not particularly limited; it may be one or more, but numbers such as two, four, six, eight, twelve, or eighteen are preferred. In this embodiment, the rolls 10 are packaged in the gusseted packaging bag such that the axial direction of the rolls 10 coincides with the MD direction of the resin film constituting the gusseted packaging bag. The gusseted packaging bag of this embodiment is made of an environmentally friendly resin film containing 1% to 75% by mass of biomass-derived raw materials and having a Young's modulus in the TD direction of 150 MPa to 600 MPa. Furthermore, the gusseted packaging bag of this embodiment has a gusset portion 35, with a printing area ratio of 20% to 95% and a gusset ratio of 20% to 95% in the gusset portion 35. According to the roll product 1 of this embodiment, which uses a packaging bag made o