JP2004099153A - Method of packaging and transporting hot-melt adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply package a hot-melt adhesive and to facilitate the handling in transportation after the packaging. <P>SOLUTION: A packaging method for the hot-melt adhesive includes a step (a) of placing a resin film wrapper 20 in a shape of a container with the upper end open which can be melted together with the hot-melt adhesive for use in a storage section 12 of a heat-resistant transporting box 10; a step (b) of filling the wrapper 20 with the hot-melt adhesive 30 at a temperature lower than the melting temperature of the wrapper 20 by 5°C or more and in a fluid state; a step (c) of covering the entire level of the hot-melt adhesive 30 with the wrapper 20; and a step (d) of cooling to solidify the hot-melt adhesive 30 stored in the transporting box 10 to obtain a package 38 containing a block of the hot-melt adhesive 30 wrapped with the wrapper 20. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for packaging and transporting a hot melt adhesive, and more particularly, to transport a hot melt adhesive from a manufacturing factory to a customer, a compounding factory, a subdivision factory, and a coating work place, and to prepare a block-like mass. And a method for transporting the packaged hot melt adhesive.
[0002]
[Prior art]
The hot melt adhesive exerts an adhesive function by being supplied to an adhesive portion in a state of being heated and melted and solidified by cooling. Here, adhesion is a concept including adhesion and adhesion in a narrow sense.
Some hot-melt adhesives have strong tackiness on the surface even when cooled and solidified. Sticky hot melt adhesives are liable to adhere to contaminants such as dirt on the surface during handling. In addition, when a worker's hand, a handling device, a tool, or the like touches, there is a problem that a part of the hot melt adhesive is transferred to a hand or the like, or the hot melt adhesive is strongly adhered and hard to be separated, which makes handling difficult.
[0003]
At a hot-melt adhesive manufacturing plant, the hot-melt adhesive discharged from a resin extruder, etc. in the high-temperature and molten state is transported to the customer's factory, to the bonding use site, and to manufacture the final product In order to transport the products to a factory, it is necessary to devise a packaging method and a transportation method.
As a conventional hot melt adhesive packaging and transportation technique, there is a technique described below.
A mold made of a hard material such as metal, which can be cooled by introducing cooling water etc., is lined with a thermoplastic resin film and filled with a hot melt adhesive in a molten state, and the filled hot melt adhesive The top surface of the agent is wrapped with a thermoplastic film, and the hot melt adhesive is cooled to obtain a package in which the block-shaped hot melt adhesive is wrapped with the thermoplastic film.
[0004]
By dissolving a part of the hot-melt adhesive in the molten state into the thermoplastic resin film, the two are strongly integrated. If the mold is rapidly cooled and the hot melt adhesive is cooled and solidified, a package is obtained in which the thermoplastic resin film is bonded to the block-shaped hot melt adhesive in a state of being closely attached to the outer periphery. This package is easy to handle because the outer surface is covered with a thermoplastic resin film and has no tackiness. The package can be transferred to another shipping box or the like and transported. At the site where the hot melt adhesive is used, if the package taken out of the shipping box is melted and used with the thermoplastic resin film attached, it can be handled without touching the hot melt adhesive at all. Since the thermoplastic resin film adheres to the outer periphery of the hot melt adhesive and there is no gap, air is not mixed into the remelted hot melt adhesive (see Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent No. 2690400
[0006]
[Problems to be solved by the invention]
However, in the packaging method disclosed in Patent Document 1 in which the block of the hot melt adhesive is wrapped with the thermoplastic film, a special cooling mold is required, and the heat of the hot melt adhesive is used. The problem is that the thermoplastic film melts and holes are formed.
In order to make the thermoplastic film adhere to the block of the hot melt adhesive without gaps, it is filled with the hot melt adhesive at a temperature high enough to partially melt the thermoplastic resin film. The melting of the film progresses, resulting in holes. In order to achieve rapid cooling, a cooling mold having a complicated and large-scale structure such as extending a cooling pipe is required, and equipment costs increase. Moreover, the package that has been cooled and solidified in the cooling mold and the block of the hot melt adhesive has been wrapped with the thermoplastic film cannot be transported and stored unless it is removed from the cooling mold and transferred to another transport container. , The number of working processes increases. Since a thermoplastic film that is re-melted together with a hot melt adhesive cannot have such a high degree of toughness, a transport container that protects the package is essential.
[0007]
An object of the present invention is to solve the above-mentioned problems of the prior art, to easily perform packaging of a hot melt adhesive, and to facilitate transportation and handling after packaging.
[0008]
[Means for Solving the Problems]
The method for packaging a hot melt adhesive according to the present invention is a method for packaging the hot melt adhesive in a block state, wherein the hot melt adhesive is formed in a container shape having an open upper end in a storage compartment of a heat-resistant transport box. (A) arranging a wrapping material made of a resin film that can be used by being melted together with an agent; (B) filling the hot melt adhesive in step (b), covering the upper surface of the hot melt adhesive filled in the previous step (b) with the wrapping material, (D) cooling and solidifying while being stored in the transport box.
[0009]
[Hot melt adhesive]
An adhesive that is solid at room temperature, but melts when heated and then solidifies by cooling after melting to exhibit adhesiveness. Basically, those having the same composition and characteristics as ordinary hot melt adhesives are used. In addition to adhesives in a narrow sense, pressure-sensitive adhesives or pressure-sensitive adhesives that exhibit adhesiveness by applying pressure can also be used. In particular, it is effective for a hot-melt adhesive having a strong tackiness or adhesion on the surface even when cooled and solidified. Such a hot melt adhesive is also called an adhesive hot melt adhesive. The pressure-sensitive adhesive also includes a pressure-sensitive adhesive.
[0010]
Specific examples of the hot melt adhesive include a hot melt adhesive made of an EVA-based, styrene-based block copolymer-based, acrylic-based, or polyamide-based material.
A hot melt adhesive having a softening point of 125 ° C. or less can be used, and preferably has a softening point of 120 ° C. or less.
Hot melt adhesives exhibit good fluidity at temperatures well above the softening point. It exhibits some fluidity even at temperatures close to its softening point. Usually, at a temperature higher than the softening point by 5 ° C. or more, the material is in a fluidized state, and filling by extrusion or the like is possible. A material having a low softening point and a high fluidity at a low temperature is easier to handle.
[0011]
Hot melt adhesives are packaged and transported in blocks of size and shape suitable for use by handling and remelting. Usually, a package is constituted with 0.5 to 20 kg as one unit. One transport unit is constituted by a plurality of such packages.
(Transportation box)
As long as the block-shaped hot melt adhesive is suitable for handling during transportation and storage, and is protected from external force and the external environment, the material and structure of the shipping box are not particularly limited, and it is used for transporting ordinary various goods. Box technology is applicable.
[0012]
As the material of the transport box, metal, synthetic resin, wood material, paper material, fiber material, ceramic material, and the like can be adopted, and a plurality of materials can be combined. The hot-melt adhesive in a heated state needs to have heat resistance so that it can be stored until cooled and solidified. The heat resistant temperature is based on the filling temperature of the hot melt adhesive.
Note that wood, paper, fiber, and the like may be peeled off and attached to the wrapping material when damaged. In some cases, the softened wrapping material may bite into the unevenness caused by this, and the wrapping material may not be able to be peeled from the shipping box. Therefore, when using such a material, it is desirable to use a material which has been subjected to a surface treatment such as resin coating.
[0013]
As the overall shape of the shipping box, in addition to a rectangular parallelepiped shape, a polygonal pillar shape, a cylindrical shape, and the like are adopted. The transport box may be composed of a plate material, or may be composed of a combination of a lattice material, a fence material, a net material, and the like. If the transport box has a foldable structure or a disassemblable structure, the storage or return operation of the transport box can be performed in a bulky state. When assembling and fixing the transport box with an adhesive tape or a metal fitting and disassembling the transport box, the adhesive tape or the metal fitting may be removed.
As a specific example of the transport box, a cardboard box made of a plastic material, that is, a box made of plastic steps, a plastic container generally used as a pass-through box, and the like can be adopted.
[0014]
The transport box may be provided with only one storage compartment, or may be provided with a plurality of storage compartments partitioned from each other. The shape and dimensions of the storage compartment are set according to the packaging form of the hot melt adhesive. Usually, the plane shape of the shipping box is divided into a plurality of storage sections having the same shape. A rectangular shape, a polygonal shape, a circular shape, or the like can be adopted as the planar shape of the storage section. By arranging the partition frame in the transport box, a storage section can be configured. The same material as the main body of the shipping box can be used for the partition frame. The transport box and the partition frame may be different materials. As the partition frame, plate-shaped partition plates can be combined vertically and horizontally. The partition frame may be formed integrally with the shipping box, or may be detachably attached to the shipping box. Like the shipping box, the partition frame can also be foldable or disassemblable.
[0015]
The shipping box has an opening. Typically, the opening is located on the top of the shipping box. The opening of each storage compartment is exposed at the opening of the shipping box.
The transport box can be provided with an opening / closing lid for closing the opening. The lid can be made of the same material as the shipping box. However, the transport box and the opening / closing lid may be made of different materials. The opening / closing lid may be a separate part detachable from the shipping box, or may be integrally formed with the shipping box so that it can be handled together with the shipping box.
The plane dimensions and height of the shipping box vary depending on the dimensions and shape of the hot melt adhesive package and the set number of storage compartments. It also depends on the transport mode of the shipping box. For example, in the case of pallet transport, it also changes depending on the size of the pallet, the number of stacked transport boxes, and the like. Typically, two to ten storage compartments can be provided in one shipping box. For example, in the case of a rectangular parallelepiped transport box, the length of one side can be set to 10 to 100 cm. The height of the shipping box can be set to 5 to 30 cm.
[0016]
(Wrapping material)
The surface is wrapped around a block of hot-melt adhesive with tackiness or adhesion to facilitate handling. It prevents dust and foreign matter from sticking to the hot melt adhesive, and prevents deterioration of the hot melt adhesive.
A material that can exhibit these functions and does not excessively melt when filled with a hot melt adhesive is used. Further, a material that does not hinder the function of the hot melt adhesive when the hot melt adhesive that has been wrapped in the wrapping material is remelted and used is used. Specific examples include olefin resins such as PE (polyethylene resin), EVA (ethylene-vinyl acetate copolymer resin), and ethylene (meth) acrylate copolymer resin, and copolymer resins thereof. The melting temperature of the encapsulating material is 80 to 135 ° C.
[0017]
With respect to the shape or structure of the wrapping material, the same technology as that of a normal wrapping material used for forming a package by wrapping a hot melt adhesive can be applied. The wrapping material has a container shape capable of holding a hot melt adhesive in a flowing state. For example, a bottomed cylinder having an open upper end can be used. A sheet material or a film material may be formed into a three-dimensional shape, or a flat sheet may be folded to form a container shape. The shape of the wrapping material can also be configured by joining sheet materials by heat fusion or the like.
The encapsulating material has an opening for filling the hot melt adhesive, and can cover and close the opening after filling the hot melt adhesive. Specifically, an extension or a cover piece extending above the filling height of the hot melt adhesive can be provided. A lid made of the same material may be used separately from the main body of the encapsulant.
[0018]
The thickness of the encapsulating material may be as thin as possible as long as the hot melt adhesive can be protected, and is usually set in the range of 5 to 75 μm.
(Placement process of wrapping material)
The wrapping material is arranged in each storage compartment of the shipping box with the upper end opened. The wrapping material may be arranged without any gap in the inner shape of the storage compartment, or may be arranged with a slight gap from the inner shape of the storage compartment. The upper end of the wrapping material may protrude above the upper end of the storage section.
<Removal sheet>
A take-out sheet can be laid between the bottom of the storage compartment and the bottom surface of the wrapping material, and both ends of the take-out sheet can be arranged to the upper end position of the storage compartment. The take-out sheet can be taken out together with the hot-melt adhesive package by lifting the take-out sheet when the hot-melt adhesive package is taken out of the shipping box at the site where the hot-melt adhesive is used.
[0019]
The material of the take-out sheet only needs to be able to withstand the heat transmitted from the hot-melt adhesive in a heated state and to support the weight of the hot-melt adhesive package. Materials that do not bond with the encapsulating material by heat are preferred. A synthetic resin sheet, a woven fabric, a nonwoven fabric, or the like is used. As the form of the take-out sheet, a band shape, a string shape, a net shape or the like can be adopted.
The heat resistance of the take-out sheet is preferably 125 ° C. or higher.
(Hot melt adhesive filling step)
A predetermined amount of hot melt adhesive is filled into the inside of the wrapping material. The temperature of the hot melt adhesive is set to a temperature lower than the melting temperature of the wrapping material. Preferably, a temperature lower than 5 ° C. is employed. As the filling temperature range of the hot melt adhesive, 65 to 125 ° C. is adopted. The heat resistance of the shipping box is set to a level that can withstand this filling temperature.
[0020]
Hot melt adhesives must be in a fluid state. The flowing state refers to a state in which when the hot melt adhesive is filled into the inside of the encapsulant, the hot melt adhesive can flow and deform to such an extent that the encapsulant and the hot melt adhesive adhere to each other. Specifically, it is preferable that the viscosity value of the hot melt adhesive is 500 Pa · S or less.
The hot melt adhesive is heated to 140 to 160 [deg.] C. in the manufacturing process in order to sufficiently dissolve each raw material. Therefore, the hot melt adhesive having a melting temperature or higher may be cooled to the set temperature by using, for example, an extruder or the like, and then filled in the wrapping material. A forced cooling step such as blowing or water cooling may be performed, or cooling may be naturally performed in the manufacturing step. It can be left to cool to a predetermined temperature. The manufactured hot melt adhesive may be stored in a hopper device or a tank device that can control the temperature.
[0021]
The hot melt adhesive in the flowing state filled in the encapsulant spreads along the inner shape of the encapsulant by the action of gravity or the like, and is cooled and solidified. The filling of the hot melt adhesive may cause the wrapping material to be pressed against the inner surface of the storage compartment, and the outer shape of the wrapping material may be deformed to follow the inner shape of the storage compartment.
When filling the encapsulating material with the hot melt adhesive, it is desirable to prevent air bubbles and air from entering as much as possible. For this purpose, it is effective to adjust the filling speed of the hot melt adhesive or to make the structure and arrangement of the hot melt adhesive filling nozzle appropriate. Operations and means for removing bubbles may be added.
[0022]
[Coating process with wrapping material]
The entire surface of the hot melt adhesive filled in the wrapping material is covered with the wrapping material so that the entire surface of the hot melt adhesive is wrapped with the wrapping material. Normally, if a part of the wrapping material is covered by covering the opening filled with the hot melt adhesive in the wrapping material, the entire surface of the hot melt adhesive is wrapped with the wrapping material.
When covering the wrapping material, it is desirable to prevent a gap or air pocket from being generated between the wrapping material and the hot melt adhesive. The covering material is covered so as to be in close contact with the hot melt adhesive.
[0023]
Since the hot melt adhesive has tackiness, the encapsulating material is adhered and fixed to the surface of the hot melt adhesive. When the hot melt adhesive to which the wrapping material is adhered is cooled and solidified, the wrapping material and the hot melt adhesive are integrated.
As a means for bringing the wrapping material into close contact with the hot melt adhesive, it is effective to heat the wrapping material covering the upper surface of the hot melt adhesive from above the wrapping material. The heated wrapping material is softened and easily deformed, and easily adheres to the hot melt adhesive. The heating can be performed by blowing hot air, irradiating a heating lamp, or bringing a heating plate into contact. When the wrapping material is heated by the heating plate and pressed against the hot melt adhesive at the same time, the adhesion between the wrapping material and the hot melt adhesive is improved.
[0024]
(Cooling and solidifying step of hot melt adhesive)
The hot melt adhesive whose entire surface is wrapped with the wrapping material is cooled and solidified while being stored in each storage compartment of the shipping box.
What is necessary is just to cool and solidify the package of the hot melt adhesive to such an extent that there is no problem in transporting and storing. It is not necessary to completely cool to normal temperature, but if the flowability of the hot melt adhesive is too high, the package is undesirably deformed during transportation. Specifically, the hot melt adhesive may be cooled to a temperature lower than the softening point, preferably lower by at least 10 ° C. than the softening point.
[0025]
In the cooling and solidifying step, the lid of the transport box may be opened or the lid may be closed. Opening the lid increases the cooling effect. With the lid closed, preparations for transport, transport and storage can begin. To facilitate cooling, they can be temporarily stored in a cool place or blown with cold air.
(Transport of hot melt adhesive package)
When the hot melt adhesive cools and solidifies to a predetermined temperature, normal transportation or storage operation using a shipping box is started. Basically, ordinary techniques for transporting and storing a hot melt adhesive package can be applied.
[0026]
In the present invention, the transportation or storage operation can be started at a stage where the hot melt adhesive is not cooled to room temperature. If the temperature of the shipping box is high, it is desirable to consider the effects of heat during handling. For example, an operator can protect gloves or the like.
The shipping boxes may be handled individually, may be handled in a separate large shipping box, or may be handled by loading on a shipping pallet. Transport pallets and containers loaded with transport boxes can be transported by transport means such as trucks, trains, and aircraft.
[0027]
The transportation can be performed between a packaging site where the package of the hot melt adhesive is produced and a use site where the hot melt adhesive is used. Depending on the distance between the packaging site and the site of use, select an appropriate transport method and transport method. The temperature of the hot melt adhesive may be cooled to room temperature before reaching the site of use, or may reach the site of use at a temperature higher than room temperature.
At the site of use, the package is taken out of the storage compartment of the shipping box. Since the worker does not directly touch the hot melt adhesive and handles the wrapping material, there is no concern that the work becomes difficult due to the tackiness and adhesion of the surface of the hot melt adhesive. .
[0028]
When the hot-melt adhesive is used by being re-melted, it can be heated and melted with the wrapping material as it is. In this method, the remelting operation can be performed without touching the block of the hot melt adhesive at all.
If the transport box from which the package is taken out is returned to the hot melt adhesive packaging site, the transport box can be repeatedly used for packaging the hot melt adhesive. If the transport box has a structure that can be folded or disassembled, the transport volume at the time of return is reduced, and the transport cost can be reduced.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show a hot melt adhesive packaging operation in the order of steps.
[Containment of wrapping material]
As shown in FIG. 1, the transport box 10 is made of a plastic container (PC27B, manufactured by Gifu Plastics Industry Co., Ltd.) and has a rectangular parallelepiped box shape with an open top. As specific dimensions of the transport box 10, a length of 59 cm, a width of 38 cm, and a height of 15 cm can be adopted. The inside of the shipping box 10 is partitioned into a plurality of storage sections 12 by a partition frame 14. Specifically, the flat square transport box 10 is divided by a grid-shaped partition frame 14, and a total of six flat square receiving sections 12 are arranged. The partition frame 14 is also made of the same plastic as the transport box 10.
[0030]
In the storage section 12, a wrapping material 20 having a bottomed cylindrical container shape is stored. The wrapping material 20 is made of an LD-PE resin film having a thickness of 25 µm and a melting temperature of 117 ° C. The specific dimensions of the wrapping material 20 are set to 18 cm in length, 17 cm in width, and 17 cm in height. The wrapping material 20 stored in the storage section 12 has a part of the upper end protruding from the storage section 12.
(Filling of hot melt adhesive)
As shown in FIG. 1, a hot melt adhesive 30 is supplied into the wrapping material 20 from a supply device 32 disposed above the shipping box 10.
[0031]
The hot melt adhesive 30 is Nittite HT-480 (trade name, SBS-based block copolymer adhesive, manufactured by Nitta Gelatin Co., Ltd.) and has a softening point of 68 ° C. It has strong adhesiveness on the surface even in the solidified state. The temperature of the hot melt adhesive 30 discharged from the feeder 32 is 75 ° C., the viscosity value is 90 Pa · S, and it has fluidity. It is supplied at a discharge speed of 36 kg / min. The filling amount is 4 kg per one wrapping material 20.
The hot melt adhesive 30 spreads and fills the internal space of the wrapping material 20. When the hot melt adhesive 30 is filled to a position slightly lower than the upper end of the storage section 12, the filling is completed. An extension 22 of the wrapping material 20 is formed above the surface of the hot melt adhesive 30. In the figure, a space is provided between the hot melt adhesive 30 and the wrapping material 20 for easy understanding, but in actuality, the space is tightly adhered to the inner surface of the wrapping material 20 without any gap. Is filled with the hot melt adhesive 30. Due to the filling of the hot melt adhesive 30, the encapsulating material 20 may be expanded and deformed along the inner surface shape of the storage compartment 12.
[0032]
Since the filling temperature of the hot melt adhesive 30 is sufficiently lower than the melting temperature of the encapsulating material 20, the encapsulating material 20 hardly melts and does not have holes. However, the wrapping material 20 in contact with the hot melt adhesive 30 may be locally softened to such an extent that there is no hole.
The hot melt adhesive 30 is cooled by contact with the outside air and heat transfer from the wrapping material 20 to the transport box 10. Therefore, unless the wrapping material 20 is excessively softened or melted at the time of contact with the hot melt adhesive 30, it will not be melted in the subsequent process.
[0033]
[Packing with wrapping material]
After the filling of the hot melt adhesive 30 is completed, the extending portion 22 of the wrapping material 20 extending above the surface of the hot melt adhesive 30 is folded back to the surface side of the hot melt adhesive 30 to obtain the hot melt adhesive. The entire surface of the adhesive 30 is covered with the wrapping material 20.
As shown in FIG. 2, the extending portion 22 of the encapsulating material 20 folded on the surface of the hot melt adhesive 30 adheres to the hot melt adhesive 30 and is joined thereto. If the hot melt adhesive 30 is in a fluidized state or a softened state to some extent, the encapsulating material 20 is likely to be in close contact and joined.
[0034]
Next, a flat plate-like heating plate 40 is arranged above the wrapping material 20, and the wrapping material 20 is pressed against the hot melt adhesive 30 by the heating plate 40. The heating temperature of the heating plate 40 is set to 135 ° C., and the wrapping material 20 is softened and easily joined to the hot melt adhesive 30. In addition, the overlapping portions of the extending portion 22 of the wrapping material 20 are easily joined to each other. However, the wrapping material 20 does not melt. The pressure of the heating plate 40 does not need to be so large, and may be set to such a degree that the air between the wrapping material 20 and the hot melt adhesive 30 is expelled to eliminate the gap. The weight of the heating panel 40 may be applied.
[0035]
As a result, a hot melt adhesive package 38 in which the entire surface of the block of the hot melt adhesive 30 is completely wrapped with the wrapping material 20 is completed.
[Transport box lid closed]
As shown in FIG. 3, the open / close lid 16 is put on the upper opening of the transport box 10 and the lid is closed. The opening / closing lid 16 is manufactured in the same plastic stage as the main body of the shipping box 10.
The lid 16 may be attached even before the package 38 is completely cooled and solidified.
If the transport box 10 and the open / close lid 16 are fixed from above the open / close lid 16 with a band or tape, it is possible to prevent the open / close lid 16 from being opened during transportation handling.
[0036]
After the hot melt adhesive package 38 is stored in the transport box 10, it can be used for normal transport and storage operations.
[Transport to the site of use]
As shown in FIG. 4, it is convenient to use a transport pallet 50 for transportation by the truck 52.
Many transport boxes 10 are stacked on the transport pallet 50. Although not shown, it is preferable that a packing band is wrapped around the stacked transport boxes 10 or that the transport boxes 10 are wrapped with shrink tape so that the transport boxes 10 do not collapse or move.
[0037]
Even at the stage of transporting the truck 52, the hot melt adhesive package 38 in the transport box 10 may be in a certain high temperature state. It is only necessary that the hot melt adhesive 30 be solidified to such an extent that the hot melt adhesive 30 does not protrude from the encapsulating material 20 or is excessively deformed by vibration or impact applied during transportation.
As shown in FIG. 5, the transport box 10 unloaded from the truck 52 at the use site opens the opening / closing lid 16 and takes out the hot melt adhesive package 38 from the storage compartment 12. When the hot melt adhesive package 38 is taken out, it is not necessary to directly contact the hot melt adhesive 30 itself by holding the wrapping material 20.
[0038]
The hot melt adhesive package 38 is supplied as it is to a remelting furnace or the like to remelt the hot melt adhesive 30 for use. The encapsulating material 20 is melted together with the hot melt adhesive 30, but does not significantly affect the characteristic quality of the hot melt adhesive 30.
[Use of take-out sheet]
The embodiment shown in FIG. 6 utilizes a take-out sheet 60.
As the take-out sheet 60, the width is 10 cm, the length is 120 cm, and the basis weight is 20 g / m. ² PP fiber non-woven fabric (ELTAS P03020, manufactured by Asahi Kasei Corporation) sheet. The heat-resistant temperature of the take-out sheet 60 is 160 ° C.
[0039]
At the stage of FIG. 1 in the embodiment, the take-out sheet 60 is laid on the storage section 12 of the transport box 10 and the wrapping material 20 is placed thereon. Both ends of the take-out sheet 60 are extended to outside the storage compartment 12.
The filling of the hot melt adhesive 30 into the wrapping material 20 and the wrapping of the hot melt adhesive 30 with the wrapping material 20 are performed in the same manner as in the above-described embodiment. Further, the joining operation of the wrapping material 20 by the heating platen 50 is performed in the same manner. During these operations, the take-out sheet 60 is extended out of the accommodation section 12 so as not to be in the way.
If the take-out sheet 60 is not provided, the wrapping material 20 on the bottom surface side may be strongly pressed between the hot melt adhesive 30 and the bottom surface of the storage compartment 12 when pressed by the heating plate 50, and may be damaged. However, if the take-out sheet 60 exists on the bottom surface side of the wrapping material 20, such a problem can be reduced.
[0040]
After the hot melt adhesive 30 is wrapped and joined by the wrapping material 20 and the hot melt adhesive package 38 is completed, both ends of the take-out sheet 60 are folded over the hot melt adhesive package 38. Then, it is easy to close the opening / closing lid 16 from above.
At the site where the hot melt adhesive 30 is used, when the open / close lid 16 of the shipping box 10 is opened and the hot melt adhesive package 38 is taken out, both ends of the take-out sheet 60 are pulled up, and the hot melt adhesive is taken together with the take-out sheet 60. Lift the package 38. The hot melt adhesive package 38 can be easily taken out.
[0041]
Particularly, when the hot melt adhesive 30 having fluidity spreads the wrapping material 20 and is tightly attached to the inner wall of the storage compartment 12 when the hot melt adhesive 30 is packaged, the hot melt adhesive 30 In some cases, it is difficult for a finger or the like to enter the gap between the adhesive package 38 and the adhesive sheet 38. However, such a problem can be solved with the removal sheet 60.
When returning the transport box 10 to the packing site, the take-out sheet 60 can be returned together and used repeatedly.
[0042]
【The invention's effect】
The method for packaging and transporting a hot-melt adhesive according to the present invention includes the steps of: providing a wrapping material disposed in a storage compartment of a shipping box at a temperature lower than the melting temperature of the wrapping material by 5 ° C. or more, and in a fluid state; After filling a certain hot melt adhesive, the whole surface of the hot melt adhesive is covered with the wrapping material, and the hot melt adhesive is cooled and solidified while being stored in the shipping box, so that the wrapping material can be cooled quickly. The hot melt adhesive can be easily packaged without using any special equipment or performing any special operation. Under the above-mentioned temperature conditions, even if the cooling device is not used, there is no problem that the encapsulating material is melted and a hole is formed.
[0043]
If rapid cooling work is not required, the hot melt adhesive package housed in the shipping box can be immediately used for handling work such as transportation and storage without being completely cooled, and can be used for transporting from the packaging work. A quick transition to storage is possible. As a result, the number of man-hours in packaging and transportation and storage can be reduced, and the work cost can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a first step of a packaging method according to an embodiment of the present invention.
FIG. 2 is a schematic sectional view showing the next step.
FIG. 3 is a schematic sectional view showing the next step.
FIG. 4 is a schematic front view showing a transportation method.
FIG. 5 is a schematic cross-sectional view showing a process of taking out a package.
FIG. 6 is a schematic cross-sectional view showing another embodiment.
[Explanation of symbols]
10 Transport box
12 storage compartments
14 Dividing frame
16 Open / close lid
20 wrapping material
30 Hot melt adhesive
38 Hot melt adhesive package
40 heating board
60 Take-out sheet

Claims (5)

A method for packaging a hot melt adhesive in a block state,
A step (a) of disposing a wrapping material made of a resin film that can be used by being melted together with a hot melt adhesive in a container shape having an open upper end in a storage section of a heat-resistant transport box;
A step (b) of filling the inside of the wrapping material with the hot melt adhesive at a temperature lower than the melting temperature of the wrapping material by 5 ° C. or more and in a flowing state;
(C) covering the entire surface of the hot melt adhesive filled in the previous step (b) with the wrapping material;
(D) obtaining a package in which the block of the hot-melt adhesive is wrapped by the wrapping material, wherein the hot-melt adhesive is cooled and solidified while being stored in the transport box. Method. The step (a) uses a resin film having a melting temperature of 80 to 135 ° C. and a thickness of 5 to 75 μm, which is made of a polyolefin resin or a copolymer resin thereof, as the encapsulating material,
The step (b) is any one selected from the group consisting of EVA-based, styrene-based block copolymer-based, acrylic-based, and polyamide-based, and the hot-melt adhesive having a softening point of 60 to 125 ° C. Fill at ~ 130 ° C,
The method for packaging a hot melt adhesive according to claim 1, wherein the step (d) cools the hot melt adhesive to a temperature below a softening point. 3. The method for packaging a hot melt adhesive according to claim 1, wherein the step (c) heats the wrapping material covering the hot melt adhesive from above the wrapping material. In the step (a), a take-out sheet having heat resistance and extending from the bottom of the storage compartment to an upper end of a facing side is arranged in the accommodation section of the shipping box, and the wrapping material is arranged on the take-out sheet. And
The method for packaging a hot melt adhesive according to any one of claims 1 to 3, wherein in the step (c), the take-out sheet is stacked on the wrapping material covering the hot melt adhesive. A method for transporting a hot melt adhesive package obtained by the packaging method according to claim 1,
After the step (d), a step (m) of transporting the transport box containing the package from the hot melt adhesive packaging site to the use site,
A step (n) of removing the package from the storage section of the transport box at the use site; and a step (o) of returning the transport box from which the package has been removed to the hot melt adhesive packaging site. How to transport hot melt adhesive.

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