JP3029697U - Cushioning material for packaging - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a material having a cushioning function which can be deformed and can change pressure for packaging of various fields such as electronic devices, machine parts, fresh food products, processed foods and household products. To do. SOLUTION: A thermoplastic resin film is composed of two rectangular films which are superposed one above the other, and is a combination body in which longitudinal and lateral peripheral portions are airtightly integrated. The space is defined by a plurality of chambers with one or more streak-shaped fused line portions having a minute non-fused portion in the longitudinal direction or the lateral direction, and any of the edges is defined. A cushioning material for packaging provided with a sealing means having a fluid pouring hole at a position.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a cushioning material for packaging, which can be used for electronic devices, machine parts, fresh food products, processed foods, household articles and other articles in various fields.

[0002]

[Prior art]

 As a conventionally known cushioning material for packaging, for example, a polyethylene sheet having a foamed spherical shape in a certain arrangement, a foamed polyurethane foamed in a block shape, or the like is known, but the former is high in cost and the latter is the latter. For example, when packing a package in a cardboard box, it must be individually foam-molded into a specific shape and size, which results in high cost and is bulky when it is discarded. However, re-use was not considered. As an alternative to this, there is also a cushioning material for variable air pressure packaging, such as Japanese Utility Model Laid-Open No. 6-53459, but it almost eliminates the void when air is introduced between the outer box container and the article to be packaged. However, the specific structure was a plate or U-shaped cross section, and an air inlet / outlet portion was provided on the upper surface. In addition, Jikkaihei 6-6730 is a bag in which two thermoplastic films are heat-sealed to form a bag. Multiple chambers are independently heat-sealed, but common to multiple chambers. The air chambers were provided, and the check valves were provided at the ports for air supply and exhaust at the communication ports with these chambers.

[0003]

[Problems to be solved by the device]

 As for the cushioning material for variable-pneumatic packing, such as No. 6-53459, the shape of the packing that corresponds to the shape of the outer box to be packed is prepared. If so, it could not be used and the buffer function might be lost in the practical stage. In addition, since multiple chambers are completely independent in Actual Kaihei No. 6-6730, even if a pinhole occurs in one part, the remaining part is safe, so there is little problem with the buffer function itself. However, since a common air introduction chamber is provided separately for a plurality of chambers, a common air introduction chamber and a check valve are provided for each, so the structure is complicated and the cost is high. ing.

[0004]

[Means for Solving the Problems]

 The present invention provides a cushioning material for packing that does not have the above-mentioned problems, and has a very simple structure in which thermoplastic resin films are substantially two rectangular films and are vertically stacked. The air-tightly integrated vertical and horizontal peripheral portions are formed in a vertical direction or the horizontal direction in the internal space, and the streak-like fusion with a small amount of non-fused portions. By providing one or more wire-bonding portions, a plurality of chambers separated by the melt-bonding wire portions are formed, and fluid can be moved between adjacent chambers by utilizing the minute non-fusion-bonded portion. In addition, the cushioning material for packaging is characterized in that a sealing means having pores through which a fluid can be poured is provided at arbitrary positions on the peripheral portions in the vertical and horizontal directions.

Specifically, two thermoplastic resin films may be preliminarily melted together at the peripheral edge portion, or one thermoplastic resin film may be bent to substantially overlap two films. However, other than this bent portion, it may be configured by fusion bonding, or it may be extruded in a tubular shape and inflated with air to form a film, which becomes flat when placed in a natural state and has a vertical peripheral edge. It may be composed of two substantially integrated rectangles that are vertically polymerized.

As the thermoplastic resin used for the cushioning material for packaging of the present invention, a thermoplastic resin represented by polyethylene, polypropylene, a copolymer thereof, vinyl chloride resin, polystyrene, nylon, etc. is used, The type, pressure, temperature, etc. of the gas or liquid to be filled inside is selected according to the type of this material. By the known means, cold water, hot water or other liquids that do not attack the thermoplastic resin, or gases such as nitrogen gas, air, carbon dioxide gas, etc. are pressed into the room by the known means, and the room is expanded by the fluid pressure. Then, it exerts a buffer function.

The application of the fluid pressure is performed by a sealing means having pores capable of pouring out the fluid at arbitrary positions in the peripheral portions in the vertical direction and the horizontal direction, for example, a human breath such as a floating bag or a balloon, Alternatively, a gas or liquid can be easily fed into the chamber by a manual or hydraulic pump, a cylinder, a compressor, or other pressurizing means, and a plurality of chambers inside are pressed against each other from above and below to adjoin each other. It is possible to move the fluid to another chamber that operates. In addition, the fluid that has once entered the chamber can be discharged through the reverse path to make the packaging cushioning material flat again.

[0008] Generally, a film of a thermoplastic resin can be produced by sending a gas into the inside during extrusion and expanding the film, but it can be formed by a method of taking out the thermoplastic resin while stretching it using a calender roll or the like. . The film is composed of a thin film having a thickness of several μm to several tens of μm and can be manufactured by a known method. However, extrusion is advantageous because a long film can be manufactured. At that time, of course, in the case of manufacturing a wide film, even a small tubular film can be wound up on a drum and drawn out whenever necessary to be processed into a fixed length. it can. For example, it is possible to cut after fusing using a constant heat fusing pattern, or to cut a predetermined length and then heat fusing a predetermined part with a fusing pattern. The packaging cushioning material of the present invention can be obtained by providing a sealing means having pores capable of pouring out a fluid at an arbitrary position on the peripheral portion.

According to the present invention, since the sealing means having the pores through which the fluid can be poured out is provided, the internal pressure of the fluid is applied by any means to enlarge the inside of the chamber so as to have a large buffering effect, It can be made flat by removing the fluid as necessary.If there are a plurality of fluid chambers, the buffering action may be partially different, or a streak with a slight non-fusing part. Since it can be freely bent by the fusion-bonding line portion, various operational effects such as the packaging shape of the buffer body can be applied to various surfaces can be exhibited.

[0010]

[Embodiment of device]

 FIG. 1 is a simplified explanatory view showing an example of the cushioning material of the present invention showing a state in which two films are separated at a fusion-bonded portion. 2 and the peripheral portions 3 and 3 in the lateral direction are integrally sealed by fusion or the like. In addition, two streak-like heat-sealing wire portions 5, 5 are provided in the lateral direction, leaving a few minute non-fusion-bonding portions 4, 4, and the internal space is divided into chambers A, B, C. A sealing means 10 having pores 6 through which fluid can be poured is provided at the edge of the chamber A. If a fluid having such a structure is filled with a fluid through the pores, the fluid can be filled in each chamber and the shape can be changed so as to exert a buffering effect. Further, even if the fluid is once filled, it can be returned to the original flat state by removing the fluid from the pores. In this case, the fusing width, the size, the number, and the arrangement of the minute non-fusing portions can be appropriately designed, and the number of a plurality of chambers can be determined as necessary.

FIG. 2 is a simplified explanatory view showing another example of the cushioning material of the present invention, in which two films are separated at a fusion portion. The peripheral edge portions 2 and 2 and the lateral peripheral edge portions 3 and 3 are integrally sealed by fusion or the like. In the vertical direction, two streak-like heat-sealing wire portions 5 and 5 are provided, leaving a slight amount of non-fusion-bonding portions 4 and 4, and the internal space is divided into chambers A, B, and C. A flat cord-like thermoplastic tube 7 having pores 6 through which fluid can be poured is provided as a sealing means 10 on the side edge of the chamber A.

3 (a), (b), and (c) are transverse directions for explaining a state in which the thermoplastic resin film 1 used in the present invention is substantially rectangular in shape and is formed by vertically stacking the thermoplastic resin film. In the cross-sectional view of (a), if the thermoplastic resin film consists of two sheets, (b) shows one thermoplastic resin film folded and overlapped, which results in the thermoplastic resin film In the case where two rectangles are polymerized vertically, (c) is a tubular film made by expanding the thermoplastic resin with air at the time of extrusion, and both side edges are bent. In the same manner as the above, the case where the thermoplastic resin film is substantially a rectangular parallelepiped film which is formed by vertically polymerizing is shown.

FIG. 4 is a cross-sectional view taken along line XX when the chambers A, B, and C of the cushioning material of the present invention shown in FIG. 1 are uniformly filled with a fluid, and the thickness of the film is omitted. . FIG. 5 is a cross-sectional view taken along the line XX of FIG. 4 in which the internal pressure of each of the chambers A, B and C of the cushioning material of the present invention is set to be less than that of A and B. Similarly, the thickness of the film is omitted. I am doing it. The operation of adjusting the inner pressure of the cushioning material in each chamber to change it as shown in FIG. 4 or 5 is performed by removing the minute non-fusing portions 4, 4 with the streak-like heat-fusing line portions 5, 5 slightly. As a result of remaining, the rapid movement of the fluid is hindered. For example, the movement of the internal fluid is adjusted by manually pressing the chambers A, B and C from both sides. At this time, it is natural to seal the sealing means 10 having an appropriate structure. Also, when removing fluid, the fluid is sequentially sent from each chamber to the outside by the sealing means that is opened to the outside, but each chamber may be pressed out from the outer surface and pushed out, or may be rapidly processed by a suction / exhaust device. . As a result, the cushioning material of the present invention becomes flat and can be reused.

FIG. 6 is an exemplification of the sealing means 10 used in the present invention. (A) is a flat string-shaped thermoplastic resin tube 7 having pores 6 and is sealed by tying it in the same manner as a string. And (b) is a perspective view of a tube 9 having pores 6 with a check valve 8 such as a floating bag, and is suitable for relatively high pressure. . The sealing means 10 can be provided in any desired number as long as it is the peripheral edge of the cushioning material.

The packing cushioning material of the present invention has different physical properties such as strength and chemical properties depending on the type and thickness of the thermoplastic resin, but the resin may be selected according to the purpose of use. The resin may optionally be cross-linked, or may have a two-layer construction to further enhance strength and withstand repeated use. Further, it is possible to knead and extrude a commonly used anti-aging agent, compounding agent, coloring agent and the like.

In the production of the cushioning material of the present invention, as described above, only the three means of extrusion or bending and heat fusion (heat sealing) are used in combination, and not only air and inert gas but also hot water and cold water are used. Although it is possible to inject fluids including liquids, etc., it is preferable that the number of fusion-bonded parts be as simple as possible and the sealing means be simple. But it is stronger. In addition, since the fold-shaped heat-sealing part in the middle can be bent freely, for example, it can be easily bent even at a right angle, and when packing, the circumference of the article is L-shaped, U-shaped, rectangular, cylindrical, etc. A single or a combination of multiple pieces can be applied so as to surround the whole and filled in the outer box, so safe and quick packaging can be completed.

In particular, it is possible to fold by using an intermediate streak-like fused wire portion, and the fluid contained in each chamber of the shock absorbing material of the present invention can be easily sealed by the above-mentioned sealing means. In addition, it is easy to manufacture, low in cost, and has a high cushioning property for packed items, so that the products and equipment to be packed can be protected safely, and if necessary, hot water or cold water can be stored in the room. The present invention provides a cushioning material for packing that can keep the target material at a desired temperature by heat retention or cooling by pressure-filling the inside of the container, and the repeated use by removing the fluid inside the chamber. It is also a packaging material that can be used, and it is almost flat and is similar to a sheet at all times when it is not filled with fluid, so not only is it lightweight, but it also exhibits various effects such as saving space for movement and storage. it can.

[0018]

[Effect of device]

 According to the present invention, it is extremely easy to press-fit and withdraw fluid, and it is possible to configure and use multiple fluid chambers.Therefore, when storing products such as products in a carton and transporting them, The cushioning material has a very high cushioning effect because it can be packed between the and the case and packed so that the product does not rattle. Further, since the pressure in the fluid chamber can be arbitrarily configured, even if the shape and the gap between the packaged article and the box are not uniform, the cushioning material can eliminate the gap with good balance. When further cooling is required, for example, if cold water is press-fitted, the buffering action and the cooling action can be made compatible, and conversely, if heat retention is intended, hot water may be press-fitted. When fluid injection / exclusion ports are provided at both ends of the edge, if one of them is used as the injection port and the other is used as the exclusion port, it is possible to extremely easily press-fit or remove the fluid. The cushioning material of the present invention allows the fluid inside the cushioning material to easily flow out from the sealing means to the outside when the article is taken out from the package, and thus can be folded into a small size for reuse.

[Brief description of drawings]

FIG. 1 is a simplified explanatory view showing a state where two films of a cushioning material for packaging of the present invention are separated at a fusion-bonded portion.

FIG. 2 is a simplified explanatory view showing another example of a state in which two films of the packaging cushioning material of the present invention are peeled off at the fusion-bonding portion.

FIG. 3 is a cross-sectional view of a thermoplastic resin film used as a cushioning material for packaging of the present invention in a polymerized state, where (a) is composed of two thermoplastic resin films and (b) is one. When the thermoplastic resin film of (1) is bent, (C) shows a case where the thermoplastic resin is expanded by air during extrusion to form a tubular film.

FIG. 4 is a cross-sectional view taken along line XX in the case where the internal pressure is evenly applied to each chamber in the packaging cushioning material according to the present invention configured as shown in FIG.

FIG. 5 is a cross-sectional view taken along line XX of the packaging cushioning material of the present invention having the configuration of FIG. 1 in the case where internal pressure is unevenly applied to each chamber.

FIG. 6 shows a sealing means, (a) is a cross-sectional view of a string-like thing, and (b) is a cross-sectional view of a tube with a check valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermoplastic resin film 2 Vertical direction peripheral part 3 Horizontal direction peripheral part 4 Small non-fusing part 5 Streak fusion line part 6 Pore 7 Flat string-like thermoplastic resin tube 8 Check valve 9 Tube 10 Sealing means A, B, C-chamber

Claims (6)

[Scope of utility model registration request] 1. A combination body in which a thermoplastic resin film is substantially two rectangular films which are vertically polymerized, and a peripheral edge portion in a longitudinal direction and a lateral direction are airtightly integrated, The space is defined by a plurality of chambers by one or more streak-shaped fusion-bonding line portions having minute non-fusion-bonding portions in the vertical or horizontal direction, and is defined by the fusion-bonding line portions. Between the adjacent chambers, the fluid is configured to be movable by a small non-fused portion, and a sealing means having pores capable of pouring the fluid into the chamber is provided at an arbitrary position on the peripheral edge in the vertical and horizontal directions. A cushioning material for packaging, which is characterized in that 2. A thermoplastic resin film, which is a tubular extruded film, which is flattened and is substantially vertically polymerized with two rectangular films, and the open edges are fused and airtightly integrated. The cushioning material for packaging according to claim 1, comprising: 3. A thermoplastic resin film in which one film is folded and overlapped, and two rectangular films are substantially vertically polymerized, and open edges are fused and airtightly integrated. The cushioning material for packaging according to claim 1, comprising: 4. The cushioning material for packaging according to claim 1, wherein the thermoplastic resin film is composed of two separate films, and the peripheral portions in the longitudinal direction and the transverse direction are hermetically integrated by fusion bonding. 5. A flat cord-like thermoplastic resin tube is used as the sealing means having pores through which the fluid can be poured and discharged.
Alternatively, the cushioning material for packaging according to 2 or 3 or 4. 6. The packaging cushioning material according to claim 1, wherein the sealing means having pores through which the fluid can be poured and discharged comprises a tube provided with a check valve.