Manufacturing method for paper cushioning material for individual fruit packaging

Abstract

To provide a rational manufacturing method of an individually-packaging paper-made cushioning material for a fruit.SOLUTION: A first paper sheet 11 and a second paper sheet 12 are prepared. An adhesive 13 is applied on longitudinal both end edges of the first paper sheet 11. After applying the adhesive 13, the second paper sheet 12 is laminated on the first paper sheet 11 to obtain a laminated paper sheet 14 having longitudinal bonding regions on longitudinal both end edges (a first step). In a region other than the longitudinal bonding regions of the laminated paper sheet 14, a tearing region having a zigzag tearing in the longitudinal direction and a non-tearing region without a tearing in the width direction are alternately provided in order in the laminated paper sheet by using a cutter 16 (a second step). Simultaneously with the second step, the laminated paper sheet 14 is cut in the width direction at a border or a border vicinity of the tearing region and the non-tearing region (a third step). An opening of the obtained paper-made cushioning material is opened, and a fruit is individually packaged with the non-tearing region as its bottom.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a method for producing a paper cushioning material used for individually packaging fruits such as apples and peaches. [Background technology]

[0002] Conventionally, a packaging and cushioning material called a fruit net (also called a fruit cap) has been used to protect fruits such as melons and apples. Fruit nets are made from synthetic resin foam sheets that are molded into a net shape. Cylindrical fruit nets are also used to cover glass or ceramic bottles to prevent them from breaking. However, because fruit nets are made from bulky synthetic resin foam sheets, there is a problem that they require a large space for storage. In addition, because they are made from synthetic resin, they are not desirable from the perspective of protecting the global environment, such as the recent trend toward eliminating plastics.

[0003] For this reason, the applicant of the present application proposed a cylindrical paper cushioning material instead of a synthetic resin cushioning material (Patent Document 1). This cylindrical paper cushioning material 20 is a planar material in which a first paper sheet and a second paper sheet, each having a long and zigzag cut 2, are laminated, the cut 2 of each paper sheet being synchronized, and both longitudinal edges of the paper sheet are bonded together with an adhesive in a longitudinal bonding region 3 (FIG. 1). When this planar paper cushioning material is stretched in the width direction, the paper body 1 between the cuts 2, 2 rises up in a direction perpendicular to the surface direction to form a mesh-like shape, and when a glass bottle or a ceramic bottle is inserted between the first paper sheet and the second paper sheet, it becomes a cylindrical cushioning material. Therefore, since the paper cushioning material is planar during storage and cylindrical during use, it is preferable because it does not take up much space during storage. In addition, from the viewpoint of protecting the global environment, such a paper cushioning material is preferable.

[0004] The manufacturing method of the cylindrical paper cushioning material 20 proposed by the applicant is as shown in Fig. 2. First, adhesive 13 is applied to both longitudinal edges of a long first paper 11 while it is being conveyed by an applicator 15, and then a long second paper 12 is superimposed on the first paper 11 to obtain a laminated paper 14. The laminated paper 14 is then conveyed to the position of a cutter 16 equipped with a linear cutting blade 19, and the cutter 16 is lowered toward a receiving table 17 to provide staggered cuts 2. A cutter 18 equipped with a cutting blade extending in the width direction of the laminated paper 14 is then lowered toward the receiving table 17 to cut the laminated paper 14, thereby obtaining a cylindrical paper cushioning material 20.

[0005] The cylindrical paper cushioning material 20 obtained by this method is suitable for use as a cushioning material for the exterior of a glass bottle or a ceramic bottle, but when used as an individual packaging material and cushioning material for fruit, the fruit may fall off the bottom of the tube. For this reason, it was thought that one opening of the cylindrical paper cushioning material 20 should be glued to provide a bottom for the tube. That is, an attempt was made to intermittently provide a width-bonded region in which the first paper and the second paper are bonded in the width direction, and to use this width-bonded region as the bottom. However, in order to provide a width-bonded region, the conveyance of the first paper and the second paper must be stopped for a long time. That is, it is necessary for the bonding of the first paper and the second paper to be fixed, for example, the time for the adhesive to set in the case of a solution-based adhesive such as a water-soluble adhesive, the time for the adhesive to set in the case of a pressure-sensitive adhesive, and the time for the adhesive to fuse in the case of a heat-sensitive adhesive, and the conveyance must be stopped during this time, which is a drawback in that the paper cushioning material cannot be produced rationally.

[0006] [Patent Document 1] Patent No. 6746163 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a method for rationally producing paper cushioning material without stopping the transport of the first sheet and the second sheet. [Means for solving the problem]

[0008] The present invention solves the above problem by utilizing the manufacturing method shown in Fig. 2, providing a non-cut region where there is no row of cuts made by cutter 16, and making this region the bottom of a tube. That is, the present invention relates to a method for manufacturing a paper cushioning material for individual packaging of fruit, which has a cut region, a non-cut region, and a part of the adjacent cut region, comprising: a first step of obtaining a laminated paper having a longitudinally bonded region in which both longitudinal edges of a long first paper and a long second paper are bonded together with an adhesive; a second step of alternately providing cut regions with staggered cuts in the longitudinal direction and non-cut regions with no cuts in the width direction of the laminated paper in a region other than the longitudinally bonded region of the laminated paper; and a third step of cutting the laminated paper in the width direction at a position near the boundary between the cut region and the non-cut region and including a part of the adjacent cut region.

[0009] [Terminology definition] In the present invention, the term "staggered cuts" refers to cuts in adjacent rows that are shifted by approximately half a degree, and cuts are present at any position perpendicular to the rows of cuts. In the present invention, the term "slit region" refers to a region where staggered slits exist. In the present invention, the term "non-slit region" refers to a region where no slits exist in a position perpendicular to the row of slits. In the present invention, "near the boundary between a cut region and a non-cut region" means a position that includes the boundary between a cut region and a non-cut region and a part of the adjacent cut region. Effect of the Invention

[0010] According to the manufacturing method of the present invention, a cylindrical paper cushioning material having a base formed by the non-slit region and a part of the adjacent slit region can be obtained by the third step. Therefore, the step of fixing, fixing or fusing the adhesive in the width direction in the first step can be omitted to rationally obtain a cylindrical paper cushioning material having a base. Therefore, even if the cylindrical paper cushioning material obtained by the manufacturing method of the present invention is used as a paper cushioning material for individually wrapping fruit, the fruit is unlikely to fall out of the bottom. In addition, this cylindrical paper cushioning material has an effect of not being bulky because it is flat before the fruit is individually wrapped, and has an effect of being suitable for protecting the global environment because it is made of paper. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a plan view of a tubular paper cushioning material obtained by the method described in Patent Document 1. [Diagram 2] 1A to 1C are schematic side views showing a manufacturing process for a tubular paper cushioning material or a manufacturing process for a paper cushioning material according to an example of the present invention. [Diagram 3] FIG. 2 is a plan view showing a cut region, a non-cut region, and the vicinity of a boundary between the cut region and the non-cut region. [Figure 4] FIG. 2 is a plan view of a paper cushioning material for individual packaging of fruit obtained by a method according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] First, a long first sheet 11 and a long second sheet 12 are prepared. The first sheet 11 and the second sheet 12 are generally prepared in the form of a roll as shown in Fig. 2. Each sheet has a basis weight of 50 to 120 g / m 2The thickness of the first sheet 11 is about 1 / 2 mm. Although the papers may be conventionally known ones such as kraft paper or crepe paper, it is preferable to use crepe paper with a soft surface for each paper, since fruits such as peaches, which have a soft surface, are individually wrapped. Then, adhesive 13 is applied to both longitudinal edges of the first sheet 11. As the adhesive 13, a commonly used pressure-sensitive adhesive, water-soluble adhesive, heat-sensitive adhesive, room temperature curing adhesive, or the like is used. If an acrylic pressure-sensitive adhesive or water-soluble adhesive that can be handled in liquid form is used, the adhesive 13 can be easily applied by pushing the adhesive 13 out from the nozzle hole of an applicator 15 equipped with a nozzle and applying it onto the first sheet 11 being conveyed.

[0013] After applying the adhesive 13, the second sheet 12 is laminated on the first sheet 11. The first sheet 11 and the second sheet 12 are then laminated with the applied adhesive 13 to obtain a laminated sheet 14 having a longitudinal bonding region 3. If a first sheet 11 is used in which a heat-sensitive film is laminated on the entire surface of the first sheet 11, the step of applying the adhesive 13 is not necessary. That is, the first sheet 11 is laminated so that the heat-sensitive film of the first sheet 11 contacts the second sheet 12, and the regions that will become both longitudinal end edges are heated and, if necessary, pressurized to obtain a laminated sheet 14 having a longitudinal bonding region 3. Here, the case where the heat-sensitive film is provided on the entire surface of the first sheet 11 has been described, but the heat-sensitive film may be provided on the entire surface of the second sheet 12, or may be provided on the entire surfaces of both the first sheet 11 and the second sheet 12. Generally, a polyethylene film is used as the heat-sensitive film.

[0014] The laminated paper 14 obtained in the first step is conveyed, and at the installation position of the cutter 16 equipped with the linear cutting blade 19, the cutter 16 is lowered toward the receiving table 17 to provide a cut region 21 with a staggered cut 2 in the longitudinal direction in the region other than the longitudinal bonding region 3 of the laminated paper 14. Next, the laminated paper 14 is conveyed so that a non-cut region 22 is provided between the preceding cut region 21 and the following cut region 21, and then the cutter 16 is lowered toward the receiving table 17 to provide the following cut region 21. With this method, the cut region 21 and the non-cut region 22 can be provided alternately and sequentially as shown in FIG. 3. Also, when a rotary blade equipped with a cutting blade on the circumferential surface of a columnar or cylindrical body is used as the cutter 16, instead of a press cutting blade as shown in FIG. 2, a portion of the circumferential surface where no cutting blade is provided may be arranged, and the cut region 21 and the non-cut region 22 may be provided alternately and sequentially. It is acceptable for the staggered cut 2 to be provided in the longitudinal bonding region 3. This is because even if a cut 2 is made here, the first sheet 11 and the second sheet 12 will not peel off from each other.

[0015] Simultaneously with or after the second step, the laminated paper 14 is cut in the width direction near the boundary between the cut region 21 and the non-cut region 22 in the third step. The second and third steps are preferably performed simultaneously. In the second and third steps, the laminated paper 14 is generally stopped and then conveyed intermittently, and therefore the number of stops is reduced to streamline the manufacturing process. The cutting position is a position 24 near the boundary 23 between the cut region 21 and the non-cut region 22 shown in FIG. 3, which includes a part of the adjacent cut region 21. If the cutting is performed at the boundary 23, if the cutting position is within the non-cut region 22 due to a slight positional shift, both openings of the cylindrical paper cushioning material are closed, which may result in a defective product. The position 24 is preferably a position where half of the last cut rows of the adjacent cut region 21 are present, as shown in FIG. 3, but it may be a position further down where all the cut rows are present.

[0016] In this manner, a paper cushioning material for individual packaging of fruit is obtained, which has cut region 21, non-cut region 22, and a part of the adjacent cut region, as shown in Figure 4. The paper cushioning material shown in Figure 4 was obtained when cutting at position 24 near boundary 23 and including a part of the adjacent cut region 21.

[0017] If such paper cushioning material is used, the cut regions 21 are stretched in the width direction, the paper body 1 is made upright into a net-like shape, and fruit such as apples or peaches is inserted between the first paper 11 and the second paper 12, the unslit regions 22 will become the bottom of the tube, making the fruit less likely to fall out. Therefore, if fruit is individually wrapped with the paper cushioning material obtained by the method of the present invention, the surface of the fruit will not be easily damaged, making it a suitable paper cushioning material for individual wrapping of fruit. [Explanation of symbols]

[0018] 1 Paper body 2nd cut 3 Longitudinal lamination area 11 First paper 12 Second paper 13. Glue 14 Laminated Paper 15 Coating equipment 16 Cutter 17 Cradle 18 Cutter 19 Linear cutting edge 20 Cylindrical paper cushioning material 21 Cut area 22 Uncut area 23 Boundary between cut and non-cut regions 24 Position near the boundary 23 including part of the adjacent cut region 21

Claims

1. A first step of obtaining a laminated paper having a longitudinal bonding region in which both longitudinal end edges of a long first paper sheet and a long second paper sheet are bonded together with an adhesive; A second step of alternately and sequentially providing cut regions having staggered cuts in the longitudinal direction and non-cut regions having no cuts in the width direction of the laminated paper in an area other than the longitudinal bonding area of ​​the laminated paper; A manufacturing method for paper cushioning material for individual packaging of fruit, which has the cut area, the non-cut area, and a portion of the adjacent cut area, characterized in that it includes a third step of cutting the laminated paper in the width direction near the boundary between the cut area and the non-cut area and at a position that includes a portion of the adjacent cut area.

2. 2. The method for producing paper cushioning material for individual packaging of fruit according to claim 1, wherein the second and third steps are carried out simultaneously.

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