Packaging body and packaging device for ion exchange membrane roll

Abstract

To provide a rigidly strong packing body of an ion-exchange film wound body, that is easy to be treated as a waste, and further exhibits a water-resistant property.SOLUTION: A packing body 1 capable of packing an ion-exchange film wound body 10 comprises a resin foam 30 whose density is 20 kg / m2 or more (JIS K7222), whose 5% compression stress is 0.13 Mpa or more (JIS7220). and whose bending stress (yield point) is 0.32 Mpa or more (JIS7221). Further, the resin foam 30 has an average thickness of 20 mm or more, and a thermal conductivity of 0.036 W / mk or less (JISA1412).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a package and a packaging device for an ion exchange membrane roll. [Background technology]

[0002] There is an ion-exchange membrane chlor-alkali process in which salt water is electrolyzed using an ion-exchange membrane to produce chlorine and caustic soda. It is recommended that the ion-exchange membranes used in this process be replaced every 3 to 4 years.

[0003] Therefore, conventionally, an ion exchange membrane roll, which is formed by winding an ion exchange membrane around a core, is packed in a package and transported. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-210043 Summary of the Invention [Problem to be solved by the invention]

[0005] Ion exchange membranes need to absorb water and swell from a dry state to a wet state before use. Therefore, it is desirable that the ion exchange membranes be transported in a wet state from the time of shipment so that users can quickly replace the ion exchange membranes. Therefore, it is desirable that the packaging be water-resistant.

[0006] Furthermore, since ion exchange membranes are used worldwide, are often transported overseas by air, and are manufactured using very expensive raw materials, the packaging must be strong enough to securely pack the ion exchange membranes.

[0007] Furthermore, the package must be opened by the user at the delivery destination and the remaining package must be discarded. For this reason, it is desirable that the package be easy to handle as waste and easy to recycle.

[0008] The present application has been made in consideration of the above points, and one of its objects is to provide a packaging body and packaging device for ion exchange membrane rolls that are easy to dispose of as waste, are hard and strong, and are also water-resistant. [Means for solving the problem]

[0009] As a result of extensive research, the inventors have found that the above problems can be solved by using a special resin foam for the packaging of the ion exchange membrane roll, and have thus completed the present invention.

[0010] That is, the present invention includes the following aspects. (1) Ion exchange membrane rolls can be packed and the density is 20 kg / m 3 (JIS K7222), 5% compressive stress of 0.13 MPa or more (JIS7220), bending stress (yield point) of 0.32 MPa or more (JIS7221) The resin foam has an average thickness of 20 mm or more and a thermal conductivity of 0.036 W / mk or less (JIS A1412). , a package of ion exchange membrane rolls. (2) The ion exchange membrane roll package described in (1) above, wherein the ion exchange membrane roll includes a winding core and a wound ion exchange membrane wound around the winding core, and the inner surface of the resin foam is provided with a holding portion that holds the winding core so that the surface of the wound ion exchange membrane does not come into contact with the resin foam. (3) The resin foam has a top surface and a bottom surface, and the top surface and the bottom surface have fitting portions that can fit together. (1) or (2) A package of the ion exchange membrane roll described in 1. (4) The resin foam has air holes that connect the inside and the outside of the resin foam. (1)~(3) 10. A package of the ion exchange membrane roll according to claim 9. (5) A band attachment portion for attaching a packaging band is provided on the outer surface of the resin foam, and a recess is formed in a part of the band attachment portion. (1)~(4) 10. A package of the ion exchange membrane roll according to claim 9. (6) A recess for a handle is formed on the outer surface of the resin foam.(1)~(5) 10. A package of the ion exchange membrane roll according to claim 9. (7) The resin foam has a foam top half covering the top half of the ion exchange membrane roll and a foam bottom half covering the bottom half of the ion exchange membrane roll, and the foam top half and the foam bottom half have the same shape and are configured to be able to fit together. (1)~(6) 10. A package of the ion exchange membrane roll according to claim 9. (8) The foam top half and the foam bottom half can be fitted together with their longitudinal directions facing in opposite directions. (7) A package of the ion exchange membrane roll described in 1. (9) The resin foam has a long side of 1.3 m or more and an expansion ratio of 50 times or less. (1)~(8) 10. A package of the ion exchange membrane roll according to claim 9. (10) A packaging bag capable of sealing the ion exchange membrane roll is further provided, and the resin foam has an internal dimension that allows air expansion to at least 1.3 times the size of the packaging bag under reduced pressure during air transportation. (1)~(9) 10. A package of the ion exchange membrane roll according to claim 9. (11) (1)~(10) and an ion exchange membrane roll packed in a resin foam of the packaging body. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a package and a packaging device for an ion exchange membrane roll that are easy to dispose of as waste, are hard and strong, and are also water-resistant. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing an example of a package according to the present embodiment. [Figure 2] FIG. 2 is a perspective view showing the package in an opened state. [Figure 3] FIG. 2 is a perspective view of the resin foam body with the ion exchange membrane roll removed. [Figure 4] FIG. 1 is a plan view of a foam bottom half; [Figure 5] FIG. 10 is a side view of the foam bottom half from the third sidewall side. [Figure 6] FIG. 10 is a side view of the foam bottom half from the fourth side wall side. [Figure 7] AA cross-sectional view of the foam bottom half taken along a plane perpendicular to the longitudinal direction X. FIG. [Figure 8] BB cross-sectional view of the foam bottom half taken along a plane perpendicular to the longitudinal direction X. FIG. [Figure 9] FIG. 1 is an E-E cross-sectional view taken along a plane perpendicular to the short-side direction Y of the foam bottom half. [Figure 10] FIG. 10 is a side view of the foam bottom half as seen from the second side wall portion side. [Figure 11] FIG. 1 is a perspective view of the foam bottom half turned upside down. [Figure 12] FIG. 10 is a bottom view of the foam bottom half. [Figure 13] FIG. 10 is a side view of the foam top half and foam bottom half as viewed from the third side wall portion side. [Figure 14] FIG. 10 is a side view of the foam top half and foam bottom half as viewed from the fourth side wall portion side. [Figure 15] FF cross-sectional view of the foam top half and foam bottom half cut along a plane perpendicular to the longitudinal direction X on the first side wall portion side. FIG. [Figure 16] GG cross-sectional view of the foam top half and foam bottom half taken along a plane perpendicular to the longitudinal direction X on the second side wall side. FIG. [Figure 17] This is a cross-sectional view of the foam top half and foam bottom half cut along a plane perpendicular to the short direction Y. [Figure 18] FIG. 2 is a perspective view showing the package in a packaged state. [Figure 19] FIG. 2 is a perspective view showing a state in which packages are stacked. [Figure 20] 1 is a graph showing the results of measuring the temperature change inside the packaging body of the present invention and a conventionally used plastic container. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an example of a preferred embodiment of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is a perspective view showing an example of a packaging body 1 according to the present embodiment, and Fig. 2 is a perspective view showing the packaging body 1 in an opened state.

[0015] The ion exchange membrane roll 10 packed in the package 1 has a cylindrical winding core 20 and a wound ion exchange membrane 21 wound around the winding core 20, as shown in Fig. 2. The winding core 20 is made of, for example, resin. The winding core 20 is longer than the width of the wound ion exchange membrane 21, and the wound ion exchange membrane 21 is wound around the center of the winding core 20. There are portions at both ends of the winding core 20 where the wound ion exchange membrane 21 is not wound.

[0016] The rolled ion exchange membrane 21 is a strip-shaped rolled ion exchange membrane. The rolled ion exchange membrane 21 has a function of allowing specific ions such as sodium ions to pass through. The rolled ion exchange membrane 21 has, for example, a structure in which multiple layers are laminated. The rolled ion exchange membrane 21 is made of a material such as a carboxylic acid polymer or a sulfonic acid polymer. The rolled ion exchange membrane 21 has, for example, a layer containing a fluorine-containing polymer having sulfonic acid groups and a layer containing a fluorine-containing polymer having carboxylic acid groups.

[0017] The ion exchange membrane roll 10 has a length (length of the winding core 20) of about 1450 mm to 1750 mm, and an outer diameter (outer diameter of the wound ion exchange membrane 21) of about 89 mm to 140 mm. The ion exchange membrane roll 10 weighs about 10 kg to 20 kg.

[0018] When the ion exchange membrane roll 10 is housed in the package 1, it is placed in, for example, a packaging bag 12 and sealed. The packaging bag 12 is a three-sided sealed bag made of, for example, low-density polyethylene.

[0019] 1 and 2, the packaging body 1 has a resin foam 30 capable of packaging the ion exchange membrane roll 10. The resin foam 30 has a density of 20 kg / m 3 or more (JIS K7222), 5% compressive stress is 0.13 MPa or more (JIS7220), and bending stress (yield point) is 0.32 MPa or more (JIS7221).

[0020] The density of the resin foam 30 (JIS K7222) is 50 kg / m 3 More than 66 is preferable. kg / m 3 The 5% compressive stress (JIS7220) of the resin foam 30 is more preferably 0.47 MPa or more, and even more preferably 0.65 MPa or more. The bending stress (JIS7221) of the resin foam 30 is more preferably 1.0 MPa or more, and even more preferably 1.4 MPa or more.

[0021] The resin foam 30 has an average thickness of 20 mm or more and a thermal conductivity of 0.036 W / mk or less (JIS A1412). The average thickness of the resin foam 30 refers to the average thickness of the most vulnerable portions of the longitudinal side surfaces of the resin foam 30 (the outer surfaces of the bottom wall 50, top wall 50, third side wall 53, and fourth side wall 54 described below). The average thickness of the resin foam 30 is preferably 20 mm or more, and more preferably 25 mm to 35 mm (target: 30 mm). The thermal conductivity (JIS A1412) of the resin foam 30 is more preferably 0.032 W / mk or less.

[0022] The resin foam 30 has a long side (length in the longitudinal direction X) of 1.3 m or more and an expansion ratio of 50 times or less. The expansion ratio is the expansion ratio when small-diameter resin pellets are mixed with a foaming agent and expanded by heating; the smaller the expansion ratio, the more easily the resin can be molded without losing its inherent strength. The expansion ratio is more preferably 30 times or less, and even more preferably 10 times to 20 times (target 15 times).

[0023] The resin foam 30 has a substantially rectangular parallelepiped outer shape that is long in one direction (longitudinal direction X). The resin foam 30 has a foam top half 40 that covers the upper half of the ion exchange membrane roll 10, and a foam bottom half 41 that covers the bottom half of the ion exchange membrane roll 10. The foam top half 40 and the foam bottom half 41 have, for example, the same shape. In this specification, "upper" and "lower" refer to the orientation of the resin foam 30 in Figures 1 and 2.

[0024] Fig. 3 is a perspective view of the resin foam 30 with the ion exchange membrane roll 10 removed. Fig. 4 is a plan view of the foam bottom half 41, Fig. 5 is a side view of the foam bottom half 41 as viewed from the third side wall 53, and Fig. 6 is a side view of the foam bottom half 41 as viewed from the fourth side wall 54. Fig. 7 is a cross-sectional view of the foam bottom half 41 taken along line AA in Fig. 5, cut along a plane perpendicular to the longitudinal direction X. Fig. 8 is a cross-sectional view of the foam bottom half 41 taken along line BB in Fig. 5, cut along a plane perpendicular to the longitudinal direction X. Fig. 9 is a cross-sectional view of the foam bottom half 41 taken along line EE in Fig. 10, cut along a plane perpendicular to the short-side direction Y.

[0025] 3, the foam bottom half 41 has a generally rectangular parallelepiped shape that is long in one direction (longitudinal direction X). The foam bottom half 41 has a bottom wall 50, a first side wall 51, a second side wall 52, a third side wall 53, and a fourth side wall 54.

[0026] The bottom wall 50 has a generally rectangular plate shape that is long in one direction. The first side wall 51, the second side wall 52, the third side wall 53, and the fourth side wall 54 are connected to each end of the bottom wall 50. The first side wall 51, the second side wall 52, the third side wall 53, and the fourth side wall 54 have a generally plate shape that stands approximately perpendicular to the bottom wall 50. The first side wall 51 and the second side wall 52 are provided at both ends of the foam bottom half 41 in the longitudinal direction X and face each other. The third side wall 53 and the fourth side wall 54 are provided at both ends of the foam bottom half 41 in the lateral direction Y (the horizontal direction perpendicular to the longitudinal direction X) and face each other.

[0027] 3 and 4, the third side wall 53 has an end face 70 on the top surface side. The end face 70 has, for example, a first end face 70a provided on the first side wall 51 side, a second end face 70b provided on the first side wall 51 side and arranged inside the first end face 70a, a third end face 70c provided on the second side wall 52 side, and a fourth end face 70d provided on the second side wall 52 side and arranged inside the third end face 70c.

[0028] The first end face 70a, the second end face 70b, the third end face 70c, and the fourth end face 70d are all horizontal faces extending in the longitudinal direction X.

[0029] As shown in FIGS. 3 and 7, the first end face 70a is higher than the second end face 70b, and the first end face 70a and the second end face 70b form an uneven shape in a cross section perpendicular to the longitudinal direction X.

[0030] As shown in FIGS. 3 and 8, the fourth end face 70d is higher than the third end face 70c, and the fourth end face 70d and the third end face 70c form an uneven shape in a cross section perpendicular to the longitudinal direction X.

[0031] As shown in FIG. 3, the first end face 70a and the third end face 70c are arranged on a straight line in the longitudinal direction X, and the first end face 70a is higher than the third end face 70c.

[0032] The second end face 70b and the fourth end face 70d are arranged on a straight line in the longitudinal direction X, and the fourth end face 70d is higher than the second end face 70b.

[0033] As shown in FIG. 5, for example, the first end face 70a and the fourth end face 70d are at the same height, and the second end face 70b and the third end face 70c are at the same height.

[0034] 4 and 5 , the end of the first end face 70a on the central side in the longitudinal direction X of the foam bottom half 41 is located slightly closer to the first side wall 51 than the center position C1 of the foam bottom half 41 in the longitudinal direction X. The end of the fourth end face 70d on the central side in the longitudinal direction X of the foam bottom half 41 is located slightly closer to the second side wall 52 than the center position C1 of the foam bottom half 41 in the longitudinal direction X. Therefore, when the foam bottom half 41 is viewed from the side, a small gap is formed between the first end face 70a and the fourth end face 70d. This gap serves as a vent hole D1 that connects the inside and outside of the resin foam 30.

[0035] 3 and 4, the fourth side wall portion 54 has an end face 80, for example, on the top surface side, similar to the third side wall portion 53. The end face 80 has, for example, a first end face 80a provided on the first side wall portion 51 side, a second end face 80b provided on the first side wall portion 51 side and arranged inside the first end face 80a, a third end face 80c provided on the second side wall portion 52 side, and a fourth end face 80d provided on the second side wall portion 52 side and arranged inside the third end face 80c.

[0036] The first end face 80a, the second end face 80b, the third end face 80c, and the fourth end face 80d are all horizontal faces extending in the longitudinal direction X.

[0037] As shown in FIGS. 3 and 7, the first end face 80a is higher than the second end face 80b, and the first end face 80a and the second end face 80b form an uneven shape in a cross section perpendicular to the longitudinal direction X.

[0038] As shown in FIGS. 3 and 8, the fourth end face 80d is higher than the third end face 80c, and the fourth end face 80d and the third end face 80c form an uneven shape in a cross section perpendicular to the longitudinal direction X.

[0039] As shown in FIG. 3, the first end face 80a and the third end face 80c are arranged on a straight line in the longitudinal direction X, and the first end face 80a is higher than the third end face 80c.

[0040] The second end face 80b and the fourth end face 80d are arranged on a straight line in the longitudinal direction X, and the fourth end face 80d is higher than the second end face 80b.

[0041] As shown in FIG. 6, for example, the first end face 80a and the fourth end face 80d are at the same height, and the second end face 80b and the third end face 80c are at the same height.

[0042] 4 and 6, the end of the first end face 80a on the central side in the longitudinal direction X of the foam bottom half 41 is located slightly closer to the first side wall 51 than the center position C1 of the foam bottom half 41 in the longitudinal direction X. The end of the fourth end face 80d on the central side in the longitudinal direction X of the foam bottom half 41 is located slightly closer to the second side wall 52 than the center position C1 of the foam bottom half 41 in the longitudinal direction X. Therefore, when the foam bottom half 41 is viewed from the side, a small gap is formed between the first end face 80a and the fourth end face 80d. This gap serves as a vent hole D2 that connects the inside and outside of the resin foam 30.

[0043] As shown in Figures 3 and 4, a wound body accommodating section 90 for accommodating the ion exchange membrane wound body 10 is formed in the inner part of the foam bottom half 41, i.e., the part surrounded by the bottom wall 50, the first side wall 51, the second side wall 52, the third side wall 53 and the fourth side wall 54.

[0044] The wound body accommodating section 90 has a substantially semi-cylindrical shape that corresponds to the outer shape of the ion exchange membrane wound body 10. The wound body accommodating section 90 has a first holding section 100 and a second holding section 101 that hold both ends of the winding core 20 of the ion exchange membrane wound body 10.

[0045] The first holding part 100 and the second holding part 101 hold the winding core 20 so that the surface of the wound ion exchange membrane 21 does not come into contact with the resin foam 30 .

[0046] The first holding portion 100 is formed on the inner surface of the first side wall portion 51. The first holding portion 100 is provided at a position lower than the end surface 51a on the top side of the first side wall portion 51, and has a semicircular holding surface 100a that corresponds to the outer shape of the winding core 20.

[0047] The second holding portion 101 is formed on the inner surface of the second side wall portion 52. The second holding portion 101 is provided at a position lower than the end surface 52a on the top side of the second side wall portion 52, and has a semicircular holding surface 101a that corresponds to the outer shape of the winding core 20.

[0048] Fig. 10 is a side view of the foam bottom half 41 as viewed from the second side wall 52 side. As shown in Fig. 10, a rectangular recess 110 is formed in at least one of the first side wall 51 and the second side wall 52, for example, on the outer surface of the second side wall 52. The recess 110 serves as a handle recess that is used to hold the resin foam 30, etc.

[0049] FIG. 11 is a perspective view of the foam bottom half 41 turned upside down. FIG. 12 is a bottom view of the foam bottom half 41. As shown in FIGS. 11 and 12, the bottom surface 50a of the bottom wall 50 is provided with a plurality of, for example, four band attachment portions 120 to 123 for attaching packing bands. The band attachment portions 120 to 123 are provided in this order, for example, at intervals along the longitudinal direction X of the foam bottom half 41. The band attachment portions 120 to 123 are formed along the lateral direction Y of the bottom surface 50a and are grooves recessed relative to the periphery. For example, recesses 130 and 131 are formed in the two central band attachment portions 121 and 122. The recesses 130 and 131 have, for example, a rectangular shape.

[0050] Furthermore, a fitting portion 160 is formed on the bottom surface 50a of the bottom wall portion 50 to fit with a fitting portion on the top surface of the foam top half portion 40 (described later). The fitting portion 160 is made up of a protrusion 170 and a recess 171 formed in the area other than the protrusion 170.

[0051] The protruding portion 170 has a plurality of first protruding portions 180 in a predetermined pattern located in an area on the first side wall portion 51 side of the center position C1 in the longitudinal direction X of the bottom surface 50a, and a plurality of second protruding portions 181 in a predetermined pattern located in an area on the second side wall portion 52 side of the center position C1 in the longitudinal direction X of the bottom surface 50a. The recessed portion 171 has a plurality of first recessed portions 190 in a predetermined pattern located in an area on the first side wall portion 51 side of the center position C1 in the longitudinal direction X of the bottom surface 50a, and a plurality of second recessed portions 191 in a predetermined pattern located in an area on the second side wall portion 52 side of the center position C1 in the longitudinal direction X of the bottom surface 50a.

[0052] The first convex portions 180 are formed in a rectangular shape along the longitudinal direction X. A plurality of rows of the first convex portions 180 are formed in each of the longitudinal direction X and the lateral direction Y of the bottom surface 50a. A plurality of rows of the first concave portions 190 are formed between the first convex portions 180 in each of the longitudinal direction X and the lateral direction Y of the bottom surface 50a.

[0053] For example, three first convex portions 180 are arranged at intervals in the short-side direction Y. Three first concave portions 190 are arranged at intervals in the short-side direction Y so as to be adjacent to the first convex portions 180. At the same position in the longitudinal direction X of the bottom surface 50a, the first convex portions 180 and the first concave portions 190 are alternately arranged in this order from the end on the third side wall portion 53 side in the short-side direction Y to the end on the fourth side wall portion 54 side.

[0054] Furthermore, the set of three first convex portions 180 and three first concave portions 190 arranged in the lateral direction Y is provided in a plurality of rows, for example, three rows, in the longitudinal direction X.

[0055] The second convex portion 181 and the second concave portion 191 have the same configuration as, for example, the first convex portion 180 and the first concave portion 190. That is, three second convex portions 181 are arranged at intervals in the short-side direction Y. Furthermore, three second concave portions 191 are arranged at intervals in the short-side direction Y so as to be adjacent to the second convex portions 181.

[0056] The second convex portion 181 and the second concave portion 191 are provided at positions obtained by shifting the first convex portion 180 and the first concave portion 190 point-symmetrically with respect to the center P1 (the center of the center position C1 in the lateral direction Y) of the bottom surface 50a in the longitudinal direction X and the lateral direction Y of the bottom surface 50a. At the same position in the longitudinal direction X of the bottom surface 50a, the second concave portions 191 and the second convex portions 181 are alternately arranged in this order from the end on the third side wall portion 53 side in the lateral direction Y to the end on the fourth side wall portion 54 side. The second convex portion 181 close to the center position C1 in the longitudinal direction X is adjacent to the first concave portion 190 close to the center position C1 on a straight line in the longitudinal direction X. The second concave portion 191 close to the center position C1 in the longitudinal direction X is adjacent to the first convex portion 180 close to the center position C1 on a straight line in the longitudinal direction X.

[0057] On the bottom surface 50a, the band attachment portions 120 to 123 and the protrusion 170 of the fitting portion 160 are arranged so as not to interfere with each other.

[0058] The foam top half 40 has exactly the same shape and size as the foam bottom half 41. The foam top half 40 shown in Figures 1 to 3 is the foam bottom half 41 inverted upside down and then inverted in the longitudinal direction X. That is, the foam top half 40 has a top wall 50, a first side wall 51, a second side wall 52, a third side wall 53, and a fourth side wall 54. Note that the configuration of the foam top half 40 is substantially the same as that of the foam bottom half 41, and therefore the same names and symbols are used except that the bottom wall 50 is referred to as the top wall 50 and the bottom surface 50a is referred to as the top surface 50a.

[0059] For example, the third side wall 53 of the foam top half 40 has, on the bottom side, the same horizontal end face 70 as the foam top half 40. The end face 70 has, for example, a first end face 70a, a second end face 70b, a third end face 70c, and a fourth end face 70d.

[0060] Similarly, for example, the fourth side wall 54 of the foam top half 40 has a horizontal end face 80 on the bottom side, which is the same as the end face 80 of the foam top half 40. The end face 80 has a first end face 80a, a second end face 80b, a third end face 80c, and a fourth end face 80d.

[0061] A wound body accommodating section 90 that accommodates the ion exchange membrane wound body 10 is formed in the inner part of the foam top half 40, i.e., the part surrounded by the top wall 50, the first side wall 51, the second side wall 52, the third side wall 53, and the fourth side wall 54. Similar to the foam top half 40, the wound body accommodating section 90 has a first holding section 100 and a second holding section 101 that hold both ends of the winding core 20 of the ion exchange membrane wound body 10.

[0062] The first holding portion 100 is formed on the inside of the first side wall portion 51 and has a semicircular holding surface 100a that corresponds to the outer shape of the winding core 20. The second holding portion 101 is formed on the inside of the second side wall portion 52 and has a semicircular holding surface 101a that corresponds to the outer shape of the winding core 20.

[0063] The outer surface of the second side wall portion 52 of the foam top half portion 40 is formed with a rectangular recessed recess 110 for a handle.

[0064] A plurality of, for example, four band attachment portions 120 to 123 for attaching packing bands are provided on the top surface 50a of the top wall portion 50. The band attachment portions 121 and 122 have recesses 130 and 131 formed therein.

[0065] A fitting portion 160 is formed on the top surface 50a of the top wall portion 50. The fitting portion 160 is made up of a protrusion 170 and a recess 171 formed in an area other than the protrusion 170.

[0066] Similar to the bottom surface 50a, the convex portion 170 on the top surface 50a has a predetermined pattern of multiple first convex portions 180 and a predetermined pattern of multiple second convex portions 181. The concave portion 171 has a predetermined pattern of multiple first concave portions 190 and a predetermined pattern of multiple second concave portions 191.

[0067] With the above configuration, the foam top half 40 and the foam bottom half 41 can be fitted together as shown in FIG. 1. End faces 70 of the foam top half 40 and the foam bottom half 41 fit together, and end faces 80 of the foam top half 40 and the foam bottom half 41 fit together. FIG. 13 is a side view of the fitted foam top half 40 and the fitted foam bottom half 41 as seen from the third side wall 53 side, and FIG. 14 is a side view of the fitted foam top half 40 and the fitted foam bottom half 41 as seen from the fourth side wall 54 side. FIG. 15 is an FF cross-sectional view of FIG. 13 , in which the foam top half 40 and the foam bottom half 41 are cut at a plane perpendicular to the longitudinal direction X on the first side wall 51 side. FIG. 16 is a cross-sectional view taken along line GG in FIG. 13, in which the foam top half portion 40 and the foam bottom half portion 41 are cut along a plane perpendicular to the longitudinal direction X on the second side wall portion 52 side.

[0068] 15, the third end face 70c of the foam top half 40 and the first end face 70a of the foam bottom half 41 fit together, and the fourth end face 70d of the foam top half 40 and the second end face 70b of the foam bottom half 41 fit together. The third end face 80c of the foam top half 40 and the first end face 80a of the foam bottom half 41 fit together, and the fourth end face 80d of the foam top half 40 and the second end face 80b of the foam bottom half 41 fit together.

[0069] 16, the first end face 70a of the foam top half 40 and the third end face 70c of the foam bottom half 41 fit together, and the second end face 70b of the foam top half 40 and the fourth end face 70d of the foam bottom half 41 fit together. The first end face 80a of the foam top half 40 and the third end face 80c of the foam bottom half 41 fit together, and the second end face 80b of the foam top half 40 and the fourth end face 80d of the foam bottom half 41 fit together.

[0070] At this time, a vent hole D1 that communicates the inside with the outside is formed in the center of the mating surface between end faces 70 of foam top half 40 and foam bottom half 41, as shown in Fig. 13. Also, a vent hole D2 is formed in the center of the mating surface between end faces 80 of foam top half 40 and foam bottom half 41, as shown in Fig. 14.

[0071] As shown in FIG. 17, the resin foam 30 has an internal space H that allows air expansion to at least 1.3 times the size of the packaging bag 12 under reduced pressure during air transportation, for example.

[0072] Furthermore, the mating portion 160 on the top surface 50a of the foam top half 40 and the mating portion 160 on the bottom surface 50a of the foam bottom half 41 have shapes that allow them to fit together. At this time, the first convex portion 180 of one mating portion 160 fits into the first concave portion 190 of the other mating portion 160, and the second convex portion 181 of one mating portion 160 fits into the second concave portion 191 of the other mating portion 160. This fit prevents the mating portions 160 of the top surface 50a and the bottom surface 50a from shifting from each other in the short direction Y and the long direction X.

[0073] Next, a method of using the packaging body 1 configured as above will be described. As shown in Fig. 2, the ion exchange membrane roll 10 is housed in a packaging bag 12 with the rolled ion exchange membrane 21 in a wet state and sealed. The ion exchange membrane roll 10 is housed in a foam bottom half 41. The winding core 20 of the ion exchange membrane roll 10 is held by a first holding part 100 and a second holding part 101. At this time, the rolled ion exchange membrane 21 of the ion exchange membrane roll 10 is not in contact with each other.

[0074] Next, as shown in Figure 1, the foam top half 40 is placed over the foam bottom half 41. At this time, the end face 70 of the foam top half 40 and the end face 80 of the foam bottom half 41, and the end face 80 of the foam top half 40 and the end face 70 of the foam bottom half 41 are fitted together. Also, at this time, ventilation holes D1 and D2 are formed.

[0075] 18, a packing band 200 is hung on the band attachment portions 120 to 123 and tied. In this way, the ion exchange membrane roll 10 is packed in the package 1. The package 1 containing the ion exchange membrane roll 10 serves as the packaging device in the present invention.

[0076] 19, multiple packages 1 may be stacked in multiple rows on a pallet 210. These packages 1 are bound together with packaging bands 200. When the packages 1 are stacked, the fitting portion 160 on the top surface 50a of the foam top half 40 of the lower package 1 fits into the fitting portion 160 on the bottom surface 50a of the foam bottom half 41 of the upper package 1.

[0077] When the ion exchange membrane roll 10 is taken out of the package 1, the packaging band 200 is removed, the foam top half 40 is removed from the foam bottom half 41 by placing a hand in the recess 110, and the package 1 is opened.

[0078] According to this embodiment, the resin foam 30 of the packaging body 1 has a density of 20 kg / m 3 or more (JIS K7222), a 5% compressive stress of 0.13 MPa or more (JIS7220), and a bending stress (yield point) of 0.32 MPa or more (JIS7221). Thus, unlike typical resin foams, the resin foam 30 of this embodiment is extremely hard and strong. Therefore, it is possible to realize a packaging body 1 that can withstand overseas transportation such as air transport, and as a result, it is possible to safely transport ion exchange membranes all over the world. Furthermore, the high density and hardness of the resin foam 30 makes it easy for users to handle it as waste, easy to recycle, and also makes it possible to realize a packaging body 1 that is highly water-resistant.

[0079] The inner surface of the resin foam 30 is provided with holding portions 100, 101 for holding the winding core 20 so that the surface of the wound ion exchange membrane 21 does not come into contact with the resin foam 30. This makes it possible to prevent deterioration and damage to the wound ion exchange membrane 21 during overseas transportation, etc.

[0080] The resin foam 30 has an average thickness of 20 mm or more and a thermal conductivity of 0.036 W / mk or less (JIS A1412). This allows for a harder and stronger packaging body 1, as well as a packaging body 1 with excellent heat insulation properties. Ion exchange membranes tend to wrinkle due to large temperature changes, causing deterioration of membrane performance. However, with this configuration, even if there are changes in the outside air temperature during overseas transportation, heat transfer to the rolled ion exchange membrane 21 is blocked, preventing membrane deterioration of the ion exchange membrane.

[0081] The top surface 50a of the foam top half 40 of the resin foam 30 and the bottom surface 50a of the foam bottom half 41 have a fitting portion 160 that can fit together. Even when many packages 1 are stacked and transported overseas by air freight or other means, they are unlikely to shift, allowing expensive ion exchange membrane rolls 10 to be transported overseas safely.

[0082] The resin foam 30 has vent holes D1 and D2 that connect the inside and outside of the resin foam 30. This allows depressurization under reduced pressure during air transportation, for example.

[0083] The outer surface of the resin foam 30 is provided with band attachment portions 120 to 123 for attaching the packing band 200, and recesses 130 and 131 are formed in the band attachment portions 121 and 122. This allows the packing band 200 to be suitably held by inserting a hand or fingers into the gap between the packing band 200 and the recesses 130 and 131 when the packing band 200 is wrapped around the hard resin foam 30.

[0084] A recess 110 for a handle is formed on the outer surface of the resin foam 30. This makes it easy to open the foam top half 40 and foam bottom half 41 even when the resin foam 30 is hard.

[0085] The foam top half 40 and foam bottom half 41 of the resin foam 30 have the same shape and are configured to be able to fit together. In this case, the resin foam 30 can be manufactured by simply molding one type of foam, thereby reducing the manufacturing cost of the packaging body 1.

[0086] The foam top half 40 and the foam bottom half 41 can be fitted together with their longitudinal directions X facing in opposite directions, so that the foam top half 40 and the foam bottom half 41 can be suitably formed to have the same shape.

[0087] The resin foam 30 has a long side of 1.3 m or more and an expansion ratio of 50 or less. In this case, the long ion exchange membrane roll 10 can be transported appropriately with the hard resin foam 30.

[0088] The resin foam 30 has an internal dimension that allows air expansion under reduced pressure during air transportation to at least 1.3 times the size of the packaging bag 12. In this case, it is possible to prevent the packaging bag 12 from bursting under reduced pressure during air transportation.

[0089] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the ideas described in the claims, and it is understood that these modifications and alterations also fall within the technical scope of the present invention.

[0090] For example, the shape and structure of resin foam 30 are not limited to those in the above embodiment. The shape and arrangement of fitting portions 160 on top surface 50a and bottom surface 50b, the number of convex portions and concave portions, etc. are not limited to those described above. Foam top half 40 and foam bottom half 41 do not have to have the same shape. [Example]

[0091] The packaging 1 of the present invention and a conventional plastic (PP) container (conventional product) were stored outdoors, and the temperature changes inside the containers were compared. Figure 20 shows the results of measuring the temperature changes comparing the packaging 1 of the present invention with the conventional product. The packaging 1 was able to reduce the temperature change inside the container by nearly 10°C compared to the plastic container. The packaging 1 is sometimes temporarily stored outdoors, such as before loading for air transport, and preventing temperature increases during transportation has a significant advantage. [Industrial Applicability]

[0092] The present invention is useful in providing a package for a rolled ion exchange membrane that is easy to dispose of as waste, is hard and strong, and is also water-resistant. [Explanation of symbols]

[0093] 1 package 10 Ion exchange membrane roll 20 Winding core 21 Rolled ion exchange membrane 30 Resin foam 40 Foam top half 41 Foam bottom half

Claims

1. It is capable of packaging rolled ion exchange membranes and has a resin foam with a density of 20 kg / m3 or more (JIS K7222), a 5% compressive stress of 0.13 MPa or more (JIS7220), and a bending stress (yield point) of 0.32 MPa or more (JIS7221). The resin foam has an average thickness of 20 mm or more and a thermal conductivity of 0.036 W / mk or less (JIS A1412).

2. The ion exchange membrane wound body includes a winding core and a wound ion exchange membrane wound around the winding core, The packaging body of the ion exchange membrane roll described in claim 1, wherein the inner surface of the resin foam is provided with a holding portion that holds the winding core so that the surface of the rolled ion exchange membrane does not come into contact with the resin foam.

3. The resin foam has a top surface and a bottom surface, The packaging body for a rolled ion exchange membrane according to claim 1 or 2, wherein the top surface and the bottom surface have fitting portions that can fit together.

4. 4. The package of a rolled ion exchange membrane according to claim 1, wherein the resin foam has a vent hole that connects the inside and the outside of the resin foam.

5. a band attachment portion for attaching a packaging band is provided on an outer surface of the resin foam; The package of the ion exchange membrane roll according to any one of claims 1 to 4, wherein a recess is formed in a part of the band attachment portion.

6. 6. The package of the ion exchange membrane roll according to claim 1, wherein a recess for a handle is formed on an outer surface of the resin foam.

7. the resin foam has a foam top half covering an upper half of the ion exchange membrane roll and a foam bottom half covering a bottom half of the ion exchange membrane roll, The packaging body for a rolled ion exchange membrane according to any one of claims 1 to 6, wherein the foam top half and the foam bottom half have the same shape and are configured to be able to fit together.

8. The package of the ion exchange membrane roll according to claim 7 , wherein the foam top half and the foam bottom half can be fitted together with their longitudinal directions facing in opposite directions to each other.

9. 9. The package of a rolled ion exchange membrane according to claim 1, wherein the resin foam has a long side of 1.3 m or more and an expansion ratio of 50 times or less.

10. A packaging bag capable of sealing the ion exchange membrane roll is further provided. The packaging body of the ion exchange membrane roll described in any one of claims 1 to 9, wherein the resin foam has internal dimensions that allow air expansion of at least 1.3 times the size of the packaging bag under reduced pressure during air transport.

11. A packaging body according to any one of claims 1 to 10, a roll of an ion exchange membrane packed in the resin foam of the packaging body.

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