JP2016020066A - Method for adhering multilayer film materials - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable adhesion work to be performed easily, the adhesion work being between two respective portions of a multilayer film material and a corresponding material in order to obtain specified adhesion strength and sealability between the respective portions.SOLUTION: The method for adhering multilayer film materials comprises: superimposing a portion 15a in a surface direction of a multilayer film material 15, comprising a water impermeable film material layer 16 and a pair of nonwoven fabric film material layers 17 bonded to each surface of the water impermeable film material layer 16, on a portion 22a in a surface direction of a corresponding material 22 arranged to correspond to the multilayer film material 15; and adhering the two with an adhesive 21. The adhesive 21 is a two-component reactive-type adhesive in which a main agent and a curing agent initiate a chemical reaction by mixing of the two liquids with viscosity beginning to increase. At the time of adhesion, viscosity of the adhesive 21 immediately after mixing of the two liquids is adjusted to be in a low viscosity region of 150 to 1000 mPa s at an atmospheric temperature of 23°C. The adhesive is adjusted so that its viscosity reaches a high viscosity region of 2500 to 7000 mPa s after passage of the specified period of time of 5 minutes after mixing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a multilayer film material bonding method for bonding a multilayer film material having a non-woven film material layer on the outer surface to a corresponding material corresponding thereto, such as a capping sheet used in a waste disposal site or a debris temporary storage site. It is about.

  Some of the above-mentioned waste disposal sites are shown in Patent Document 1 below. According to this publication, the disposal site is formed in the ground and opened in a concave shape for a waste landfill, and although not shown in detail, it is generally laid on the inner surface of this landfill area. And a capping sheet that is thrown into the impermeable landfill area surrounded by the impermeable sheet and covers the entire upper surface of the waste that sufficiently fills the impermeable landfill area. In addition, the existence of a capping sheet that covers the entire upper surface of a debris temporary storage area or the like is generally known.

  The capping sheet is composed of a plurality of multilayer film materials arranged in parallel in a substantially horizontal direction. Each of these multilayer membrane materials is a non-water-permeable membrane material layer that prevents the passage of water and a non-permeable membrane material layer that allows the passage of water but has a cushioning property to protect the non-water-permeable membrane material layer. It has a pair of nonwoven fabric film material layers joined to each surface of the aqueous film material layer. And the said capping sheet | seat is formed when the mutually opposing edge of both adjacent multilayer film material is piled up, and it adhere | attaches with an adhesive agent.

  The bonding method using the adhesive between the edge portions of the both multilayer film materials is performed by allowing the adhesive to penetrate into the respective nonwoven fabric film material layers facing each other at the overlapping portion of the edge portions. That's it.

  According to the bonding method, in addition to the edge portions of the multilayer film materials being bonded to each other with a predetermined adhesive strength by the adhesive, the nonwoven fabric film material layers in the overlapping portion are The internal space is filled with the adhesive that has penetrated into the film and acts as a sealing material. Therefore, it is prevented that water permeates from one outer surface to the other outer surface of both the outer surfaces of the overlapping portion in the capping sheet. As a result, according to the capping sheet formed by adhering the multilayer film materials, water such as rainwater outside the disposal site can flow unnecessarily into the waste thrown into the impermeable landfill area. Is prevented.

JP 2011-245745 A

  By the way, the following problems may occur in the bonding method using the adhesive between the edge portions of both multilayer film materials described above.

  That is, as a characteristic of the adhesive, when the adhesive viscosity is already high at the start of the bonding operation, or when the curing speed of the adhesive is high, the respective edge portions of both the multilayer film materials are overlapped. When the adhesive is infiltrated into each nonwoven fabric film material layer facing each other at the portion, smooth penetration of the adhesive into the inside of each nonwoven fabric film material layer is inhibited, and the non-water-permeable membrane material layer There is a risk of curing before reaching. In this case, each of the nonwoven fabric film material layers cannot function as a sealing material.

  On the other hand, when the viscosity of the adhesive is low or when the curing speed is slow, when the adhesive is infiltrated into each of the nonwoven film-forming material layers, There is a risk of dripping due to excessive penetration. In this case, there is a possibility that the adhesive strength between the edge portions of both the multilayer film materials may be insufficient, and each of the nonwoven fabric film material layers cannot function as a sealing material.

  Therefore, in order to prevent the above inconvenience, it may be possible to advance the bonding work faster or to add a dripping prevention work in accordance with the characteristics of the adhesive. There is a risk that the operation becomes extremely complicated.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to correspond to a part of the multilayer film material having a nonwoven fabric film material layer on the outer surface in the surface direction. So that a predetermined adhesive strength and sealability can be obtained between each part of the multilayer film material and the corresponding material when they are overlapped with a portion in the surface direction of the corresponding material and adhered by an adhesive. It is to make it possible to easily perform the bonding operation between the respective parts for the purpose.

The invention of claim 1 is directed to the surface direction of the multilayer film material 15 having the water impermeable film material layer 16 and a pair of non-woven film material layers 17 bonded to the outer surfaces of the water impermeable film material layer 16. A multilayer film material adhering method in which a portion 15a is overlapped with a portion 22a in a surface direction of a corresponding material 22 provided so as to correspond to the multilayer film material 15 and adhered by an adhesive 21;
The adhesive 21 is a two-component reaction adhesive in which a chemical reaction is started by mixing the two components of the main agent and the curing agent and the viscosity starts to increase,
The viscosity of the adhesive 21 immediately after mixing the two liquids during the bonding is in a low viscosity range of 150 to 1000 mPa · s at an ambient temperature of 23 ° C., and the adhesive 21 is immediately after the mixing. A multilayer film material adhering method characterized by having a high viscosity range of 2500 to 7000 mPa · s after a lapse of a predetermined period of 5 minutes.

  The invention according to claim 2 is characterized in that the viscosity ratio of the main agent and the curing agent of the adhesive 21 at an ambient temperature of 23 ° C. is 1.3: 1-3: 1. This is a film material adhesion method.

  The invention of claim 3 is the multilayer film material bonding method according to claim 2, wherein the adhesive 21 is made of polyurethane.

  In the invention of claim 4, the main component of the main component of the adhesive 21 is a polyol, the main component of the curing agent is an isocyanate, and the mass mixing ratio of the main component and the curing agent is 2.5: 1-5: The multilayer film material adhering method according to claim 2, wherein the method is 1.

  In the invention of claim 5, the adhesive 21 is applied from the outer surface to the already overlapped portion 33 in which the portions 15a and 22a of the multilayer film material 15 and the corresponding material 22 are overlapped with each other within the predetermined period. The multilayer film material adhering method according to any one of claims 1 to 4, wherein the multilayer film material adhering method is applied.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

In the invention of claim 1, a part in the surface direction of a multilayer film material having a water-impermeable film material layer and a pair of non-woven film material layers bonded to each outer surface of the water-impermeable film material layer, A multilayer film material adhering method when adhering with an adhesive by superimposing on a part of the surface direction of the corresponding material provided to correspond to the multilayer film material,
The above-mentioned adhesive is a two-component reaction type adhesive in which the chemical reaction is started by mixing the two components with the main agent and the curing agent and the viscosity starts to increase,
The viscosity of the adhesive immediately after mixing the two liquids at the time of bonding is in a low viscosity range of 150 to 1000 mPa · s at an ambient temperature of 23 ° C., and the adhesive is 5 minutes after the mixing. After a predetermined period of time, a high viscosity range of 2500 to 7000 mPa · s is obtained, and the following effects are produced.

  That is, in the case of performing the bonding work for bonding each part of the multilayer film material and the corresponding material by the bonding method, first, the two liquids are mixed to produce an adhesive immediately before the start of the bonding work. To do. And the said adhesive agent is apply | coated to the nonwoven fabric film-forming material layer of the said multilayer film material in the overlapping part (The part which overlapped and the part where superposition | superposition was scheduled) of each said part are included.

  In the above case, since the viscosity of the adhesive immediately after the mixing of the two liquids was set to 1000 mPa · s or less and was appropriately lowered, this adhesive was used for the nonwoven fabric film-forming material layer in the overlapping portion with the start of the bonding operation. Begin to penetrate smoothly into the interior. At this time, if the coating operation and the penetration of the adhesive into the nonwoven fabric film material layer are completed within a predetermined period of 5 minutes at an atmospheric temperature of 23 ° C., for example, Since the adhesive is kept in the low viscosity region while preventing it from reaching the high viscosity region, the adhesive smoothly penetrates into the nonwoven fabric film material layer in the overlapping portion. And it penetrates over the necessary range inside the nonwoven fabric film material layer so as to reach the water impermeable film material layer. Then, after the adhesive reaches the water-impermeable membrane material layer and the predetermined period of 5 minutes elapses, the adhesive reaches a high viscosity region, so that the working surface is an inclined surface. Even during work, it is possible to prevent dripping more than necessary.

  Here, if the viscosity of the adhesive immediately after the mixing of the two liquids exceeds 1000 mPa · s, or if the application operation exceeds the predetermined period, the adhesive is formed into a non-woven film-forming material layer in the overlapping portion. As a result, the smooth intrusion into the interior of the nonwoven fabric is hindered and the entire interior of the nonwoven fabric film material layer may be impeded. Therefore, as described above, the viscosity of the adhesive immediately after mixing the two liquids is set to 1000 mPa · s or less.

  On the other hand, since the viscosity of the adhesive immediately after the mixing was 150 mPa · s or more and appropriately increased, when the adhesive was infiltrated into the nonwoven fabric film material layer in the overlapping portion, It is prevented that the intrusion range into the inside of the nonwoven fabric film material layer is excessive, and is retained in the nonwoven fabric film material layer of the overlapping portion.

  Here, if the viscosity of the adhesive immediately after the mixing of the two liquids is less than 150 mPa · s, this adhesive has a penetration range of the adhesive into the nonwoven fabric film material layer in the overlapping portion. If it becomes excessively large and dripping tends to occur, there is a possibility that the retention in the nonwoven fabric film material layer in the overlapped portion is hindered. Therefore, as described above, the viscosity of the adhesive immediately after mixing the two liquids at an ambient temperature of 23 ° C. is set to 150 mPa · s or more.

  Then, at least before the predetermined period elapses, each part of the multilayer film material and the corresponding material is brought into surface contact with each other, and the predetermined period elapses in the surface contact state. Then, since the adhesive reaches a high viscosity region, the parts are bonded to each other with a predetermined adhesive strength by the adhesive, and are bonded to the inside of the nonwoven fabric film forming material layer in the overlapped portion. The internal space is filled by the entire penetration of the agent, and the nonwoven fabric film-forming material layer in the overlapping portion can serve as a sealing material.

  Therefore, even if water is about to pass from one outer surface to the other outer surface of both the outer surfaces of the overlapping portion where the multilayer film material and the corresponding material are bonded to each other, As described above, it is possible to more reliably prevent the water from passing through the non-woven membrane material layer that functions as a sealing material in the overlapping portion as well as the water-permeable membrane material layer.

  Then, according to the above-described viscosity adjustment of the adhesive, each part in the overlapping portion of the multilayer film material and the corresponding material can be obtained without proceeding the bonding work faster or adding a dripping prevention work. Is bonded with a predetermined adhesive strength, and the non-woven fabric film material layer in the overlapped portion functions more reliably as a seal material, so that it is easy to bond each part of the multilayer film material to the corresponding material. Will be able to.

  In the invention of claim 2, the viscosity ratio of the main agent and the curing agent of the adhesive 21 at an ambient temperature of 23 ° C. is set to 1.3: 1-3: 1.

  For this reason, if the two liquids are mixed, the viscosity of the adhesive immediately after the mixing can be more reliably set to 150 to 1000 mPa · s.

  In the invention of claim 3, the adhesive is made of polyurethane.

  For this reason, the two-component mixing and curing can be performed at room temperature due to the above-mentioned characteristics of the polyurethane system, and the handling of the adhesive can be facilitated. Therefore, the bonding operation can be facilitated accordingly.

  In the invention of claim 4, the main component of the main component of the adhesive 21 is a polyol, the main component of the curing agent is an isocyanate, and the mass mixing ratio of the main component and the curing agent is 2.5: 1-5: 1 is assumed.

  For this reason, if the above-mentioned mass mixing ratio is maintained while maintaining the viscosity ratio between the main agent of the adhesive 21 and the curing agent at the above-described atmospheric temperature of 23 ° C., there is some vertical fluctuation in the ambient temperature during the bonding operation. Even if it exists, it becomes possible to maintain the time until hardening in the range which can endure actual use.

  According to a fifth aspect of the present invention, the adhesive is applied from the outer surface to the already overlapped portion in which the portions of the multilayer film material and the corresponding material are overlapped with each other within the predetermined period. . .

  For this reason, since the adhesive within the predetermined period is in a low-viscosity region, even if each of the parts is an already overlapped portion, the adhesive is placed inside the nonwoven fabric film forming material layer in the already overlapped portion. The interior space is filled with smooth and sufficient penetration. Therefore, since the said nonwoven fabric film-forming material layer acts reliably as a sealing material, it is prevented that water permeate | transmits the nonwoven fabric film-forming material layer in the said overlapping part.

It is a partial side sectional view of a waste disposal site. It is a figure which shows the adhesion | attachment method about a part of FIG. It is a graph which shows the change of the viscosity of the adhesives with time from the start of the bonding operation. It is a figure which shows the other adhesion | attachment method about the other part of FIG. It is a figure which shows the further another adhesion | attachment method about the other part of FIG.

  In the multilayer film material bonding method of the present invention, a part in the surface direction of a multilayer film material having a nonwoven fabric film material layer on the outer surface is superimposed on a part in the surface direction of a corresponding material provided to correspond to the multilayer film material. When adhering with an adhesive, the above-mentioned parts can be easily bonded to each other in order to obtain a predetermined adhesive strength and sealability between the parts of the multilayer film material and the corresponding material. In order to realize the purpose of doing so, the form for carrying out the present invention is as follows.

  That is, in the multilayer film material bonding method, a part of the multilayer film material having a non-water-permeable film material layer and a pair of non-woven film material layers bonded to each outer surface of the non-water-permeable film material layer in the surface direction is used. In addition, it is overlapped with a part of the surface direction of the corresponding material provided so as to correspond to the multilayer film material, and is adhered by an adhesive.

  The above-mentioned adhesive is a two-component reaction adhesive in which a chemical reaction is started by mixing two liquids using a main agent and a curing agent and viscosity starts to increase. The viscosity of the adhesive immediately after mixing the two liquids at the time of bonding is in a low viscosity range of 150 to 1000 mPa · s at an ambient temperature of 23 ° C., and the adhesive is 5 minutes after the mixing. After a predetermined period of time elapses, a high viscosity range of 2500 to 7000 mPa · s is obtained.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In FIG. 1, reference numeral 1 is a waste disposal site for making it possible to landfill waste 2 in the ground 3. The disposal site 1 includes a concave waste landfill area 6 formed on the ground 3 and opened upward, a water shielding sheet 7 laid entirely on the inner surface of the landfill area 6, and the water shielding sheet. 7 is a capping sheet 9 which is put into the impermeable landfill area 8 surrounded by 7 and covers the entire upper surface of the waste 2 filling the impermeable landfill area 8, and the gas 10 generated from the waste 2 is capped. A degassing tool 11 that can be discharged from the inside of the sheet 9 to the outside is provided.

  The water shielding sheet 7 is a sheet made of synthetic resin such as polyvinyl chloride (PVC) having excellent waterproof properties. As this synthetic resin, in addition to polyvinyl chloride (PVC), polyurethane (PU), ethylene Examples thereof include vinyl acetate copolymer (EVA) and polyethylene (PE). The water shielding sheet 7 may be a rubber sheet such as chloroprene rubber (CR) or ethylene propylene rubber (EPDM) instead of the synthetic resin sheet.

  The capping sheet 9 is composed of a plurality of multilayer film materials 15 arranged in parallel to each other in a substantially horizontal direction. Each of these multilayer film materials 15 includes a non-water-permeable film material layer 16 that prevents passage of water, and a pair of non-woven film material layers 17 and 17 that are joined to the respective outer surfaces of the non-water-permeable film material layer 16. have.

The non-water-permeable membrane material layer 16 is a porous film (pore diameter: 100 μm) having air permeability that allows passage of various gases and water vapor generated from the waste 2 while preventing the passage of water such as rainwater and sewage. Yes, the thickness is about 0.1 mm. The material of the water impermeable membrane material layer 16 is a polyolefin resin such as polyethylene or polypropylene, polytetrafluoroethylene, or polyvinylidene fluoride. The moisture permeability is preferably 1000 to 10000 g / m ² · 24 hr in order to effectively exhibit both non-water permeability and air permeability.

The nonwoven fabric membrane material layer 17 has water permeability and air permeability, while having excellent cushioning properties, so that it does not impair the water permeability and air permeability of the water impermeable membrane material layer 16 without any external force. It acts as a protective material for preventing damage to the non-water-permeable membrane material layer 16 due to the above. The fiber of the non-woven fabric film material layer 17 is a composite fiber (300 g / m ² ) composed of an outer cylinder part (sheath) and an interior part (core part) built in the outer cylinder part. The outer cylinder portion is made of polyethylene (melting point: 125 ° C.), and the interior portion is made of polyester such as polyethylene terephthalate (melting point: 260 ° C.), and has excellent heat weldability. In addition, the said nonwoven fabric film material layer 17 may be comprised by 1 type of fiber, and may be comprised by the fiber from which a single phase fiber, a cross-sectional form, etc. differ.

  Then, the capping sheet 9 is a part 15a in the surface direction of each of the adjacent multilayer film materials 15 and 15, and the edge portions facing each other are vertically overlapped and bonded with an adhesive 21. It is formed. One of the multilayer film materials 15 and 15 corresponds to the corresponding material 22 provided so as to correspond to the other multilayer film material 15, and the one multilayer film material 15. The portion 15a corresponds to a portion 22a in the surface direction of the corresponding material 22.

  The adhesive 21 is a two-component reaction type adhesive in which a chemical reaction is started and viscosity starts to increase by mixing two liquids of a liquid A as a main agent and a liquid B as a curing agent. Two liquids of the adhesive 21 are made of polyurethane. Specifically, the main component of the liquid A is a polyol, and the main component of the liquid B is an isocyanate.

  The viscosity of the liquid A is approximately 260 mPa · s and the viscosity of the liquid B is approximately 140 mPa · s, but the viscosity ratio of A: B is preferably 1.3: 1-3: 1.

  A method for bonding the parts 15a and 15a (parts 15a and 22a) of the multilayer films 15 and 15 (the multilayer film material 15 and the corresponding material 22) with the adhesive 21 will be described.

  In FIG. 2, the two-component mixed supply device 25 for the adhesive 21 used in the bonding method is filled with the high-pressure discharge pump 26 and the liquids A and B individually, and is detachable from the housing of the discharge pump 26. The cartridge type liquid tanks 27 and 27 to be attached, the static mixer 29 attached to the tip of the high pressure hose 28 extending from the discharge pump 26, and mixing the two liquids discharged from the discharge pump 26, and the static mixer 29 and a nozzle 30 for discharging the adhesive 21 produced by mixing with the static mixer 29 in a predetermined cross-sectional shape.

  The viscosity of the adhesive 21 immediately after the mixing of the two liquids by the mixing and feeding device 25 at the time of bonding is a low viscosity region of 150 to 1000 mPa · s at an ambient temperature of 23 ° C. (less than 3 minutes in FIG. 3). . In addition, the adhesive 21 is in a high viscosity range of 2500 to 7000 mPa · s after a predetermined period of 5 minutes immediately after mixing (when 5 minutes have elapsed in FIG. 3).

  In FIG. 2, when the bonding work for bonding the parts 15a and 15a (parts 15a and 22a) of the multilayer film materials 15 and 15 (the multilayer film material 15 and the corresponding material 22) is first performed, Immediately before the start of the bonding operation, the two liquids are mixed by the operation of the mixing and feeding device 25 to generate an adhesive 21, and the adhesive 21 is discharged from the nozzle 30. And the said adhesive agent 21 is each apply | coated to each nonwoven fabric film material layer 17 and 17 of the said multilayer film material 15 in the overlapping part 33 of said each part 15a, 15a (part 15a, 22a).

  In the above case, since the viscosity of the adhesive 21 immediately after mixing the two liquids is set to 1000 mPa · s or less and is appropriately lowered, the adhesive 21 is formed into a nonwoven fabric film in the overlapping portion 33 with the start of the bonding operation. It begins to penetrate smoothly into the material layer 17. At this time, if the coating operation and the penetration of the adhesive 21 into the nonwoven fabric film material layer 17 are completed within a predetermined period of 5 minutes at an ambient temperature of 23 ° C., for example, The adhesive 21 is kept in the low viscosity region while preventing the adhesive 21 from reaching the high viscosity region at the time of intrusion. It smoothly penetrates into the interior of the non-water-permeable membrane material layer 16 and penetrates over the necessary range inside each non-woven membrane material layer 17. And after the said adhesive agent 21 reaches the said water-impermeable membrane material layer and the said 5 minute predetermined period passes, since the said adhesive agent 21 reaches a high-viscosity area, when the work surface is a slope etc. Even in the coating operation, it is possible to prevent dripping of the liquid more than necessary.

  Here, if the viscosity of the adhesive 21 immediately after the mixing of the two liquids exceeds 1000 mPa · s, or if the application operation exceeds the predetermined period, the adhesive 21 will be applied to each non-woven fabric in the overlapping portion 33. Intrusion into the inside of the film-forming material layer 17 is hindered, and intrusion over the entire inside of the non-woven film-forming material layer 17 may be hindered. Therefore, as described above, the viscosity of the adhesive 21 immediately after mixing the two liquids is set to 1000 mPa · s or less.

  On the other hand, since the viscosity of the adhesive 21 immediately after the mixing is set to 150 mPa · s or more and is appropriately high, when the adhesive 21 is infiltrated into the nonwoven fabric film material layer 17 in the overlapping portion 33, The adhesive 21 is prevented from being excessively penetrated into the nonwoven fabric film material layer 17, and is retained in the nonwoven fabric film material layer 17 of the overlapping portion 33.

  Here, assuming that the viscosity of the adhesive 21 immediately after the mixing of the two liquids is less than 150 mPa · s, the adhesive 21 is an adhesive to the inside of the nonwoven fabric film material layer 17 in the overlapping portion 33. The intrusion range of 21 tends to be excessive and dripping tends to occur, and the retention of the nonwoven fabric film material layer 17 in the overlapping portion 33 may be hindered. Therefore, as described above, the viscosity of the adhesive 21 immediately after mixing the two liquids at the atmospheric temperature of 23 ° C. is set to 150 mPa · s or more. The viscosity is more preferably 200 mPa · s or more, and in this way, it is possible to further enhance the effect of preventing dripping when the atmospheric temperature during the bonding operation becomes high.

  Then, at least before the passage of the predetermined period, the parts 15a and 15a (parts 15a and 22a) of the multilayer films 15 and 15 (the multilayer film material 15 and the corresponding material 22) are brought into surface contact with each other, and the surface contact is performed. The predetermined period elapses in the state. Then, since the adhesive 21 reaches a high viscosity region, the parts 21a and 15a (parts 15a and 22a) are bonded to each other with a predetermined adhesive strength by the adhesive 21, and the overlapping portion described above is used. The inner space is filled by the entire penetration of the adhesive 21 into the nonwoven fabric film material layer 17 in 33, and the nonwoven fabric film material layer 17 in the overlapping portion 33 can serve as a sealing material.

  Therefore, one of the outer surfaces of the overlapping portion 33 where the portions 15a and 15a (the portions 15a and 22a) of the multilayer film materials 15 and 15 (the multilayer film material 15 and the corresponding material 22) are bonded to each other. The non-woven membrane material layer that acts as a sealing material at the overlapping portion 33 as well as the water-impermeable membrane material layer 16 as well as the water-impermeable membrane material layer 16 as described above, even if water is transmitted from the outer surface to the other outer surface. The passage of the water through 17 is more reliably prevented.

  As a result, if the flat film material having a large area as a whole is formed by adhering the portions 15a and 15a of the multilayer film materials 15 and 15 to each other at the overlapping portion 33 as described above, the flat film material is In the waste disposal site 1, it can be effectively applied to the capping sheet 9 and the like that are particularly required to be waterproof and breathable.

  According to the above-described adjustment of the viscosity of the adhesive 21, both the multilayer film materials 15 and 15 (multilayer film) in the overlapping portion 33 can be obtained without proceeding the bonding work faster or adding a dripping prevention work. Each of the portions 15a and 15a (parts 15a and 22a) of the material 15 and the corresponding material 22 is bonded to each other with a predetermined adhesive strength, and the non-woven fabric film material layer 17 in the overlapping portion 33 is used as a sealing material. Since it works reliably, the bonding work between the portions 15a and 15a (the portions 15a and 22a) of both the multilayer film materials 15 and 15 (the multilayer film material 15 and the corresponding material 22) can be easily performed.

  In addition, in the bonding operation, the adhesive 21 is applied to the two nonwoven fabric film material layers 17 and 17 facing each other in the already overlapped portion 33 in which the portions 15a and 15a of the multilayer film materials 15 and 15 are already overlapped with each other. In the case of applying, the adhesive 21 is applied from the outside of the outer edge portion in the surface direction of one of the nonwoven fabric film material layers 17 in the above-described overlapped portion 33 or both the nonwoven fabric film material layers 17. It may be applied so that a part or all of the adhesive 21 is totally infiltrated into each of the nonwoven fabric film material layers 17. In this case, the overlapped portion 33 may be a structure in which the nonwoven fabric film material layers 17 and 17 facing each other are simply superimposed, and the nonwoven fabric film material layers 17 and 17 facing each other. These opposing surfaces may be already joined by the adhesive 21 or various adhesives different from this and / or heat welding.

  Further, the application of the adhesive 21 may be performed while mixing the two liquids by operating the handle of a manual gun, or by brushing.

  Further, as described above, the viscosity ratio between the main agent and the curing agent of the adhesive 21 at an ambient temperature of 23 ° C. is set to 1.3: 1-3: 1.

  For this reason, if the two liquids are mixed, the viscosity of the adhesive 21 immediately after the mixing can be more reliably set to 150 to 1000 mPa · s.

  As described above, the two liquids of the adhesive 21 are made of polyurethane.

  For this reason, the two-component mixing and curing can be performed at room temperature due to the above-mentioned characteristics of the polyurethane system, and the adhesive 21 can be easily handled. Therefore, the bonding operation can be facilitated accordingly.

  Further, as described above, the main component of the main component of the adhesive 21 is a polyol, the main component of the curing agent is an isocyanate, and the mass mixing ratio of the main component and the curing agent is 2.5: 1-5: 1 is assumed.

  For this reason, if the above-mentioned mass mixing ratio is maintained while maintaining the viscosity ratio between the main agent of the adhesive 21 and the curing agent at the above-described atmospheric temperature of 23 ° C., there is some vertical fluctuation in the ambient temperature during the bonding operation. Even if it exists, it becomes possible to maintain the time until hardening in the range which can endure actual use.

  Further, as described above, the adhesive 21 is applied from the outer surface to the overlapped portion 33 in which the portions 15a and 22a of the multilayer film material 15 and the corresponding material 22 are overlapped with each other within the predetermined period. To be applied.

  For this reason, since the adhesive 21 within the predetermined period is in a low-viscosity region, the adhesive 21 is a nonwoven fabric in the overlapped portion 33 even though the portions 15a and 22a are the overlapped portions 33. The film forming material layer 17 is smoothly and sufficiently infiltrated to fill the internal space. Therefore, since the said nonwoven fabric film-forming material layer 17 acts reliably as a sealing material, it is prevented that water permeate | transmits the nonwoven fabric film-forming material layer 17 in the said overlapping part 33. FIG.

  In FIG. 4, the degassing tool 11 includes a degassing opening 36 formed in the multilayer film material 15 of the capping sheet 9 and a flange joined to the outer surface of the opening edge of the degassing opening 36 by a fastener 37. 38 and a gas vent pipe 39 having one end coupled to the flange 38. In this case, the opening edge portion of the gas vent opening 36 formed in the multilayer film material 15 corresponds to a part 15 a of the multilayer film material 15, and the flange 38 of the gas vent tool 11 corresponds to a part 22 a of the corresponding material 22. .

  And it discharges from the nozzle 30 of the said mixing supply apparatus 25 to the nonwoven fabric film-forming material layer 17 in the already overlapped part 33 of the opening edge part of the said gas vent opening 36, and the outer edge part of the said flange 38 overlapped with this. The adhesive 21 to be applied is applied. Then, the adhesive 21 enters the nonwoven fabric film material layer 17, and the opening edge of the gas vent opening 36 and the outer edge of the flange 38 are bonded together by the adhesive 21.

  Further, the multilayer film material 15 of the capping sheet 9 is provided with an opening 42 generated for repair or damage, and a cover material (patch) 43 for closing the opening 42 is provided. The multilayer film material 15 has the same configuration. In this case, the opening edge portion of the opening 42 formed in the multilayer film material 15 corresponds to a portion 15 a of the multilayer film material 15, and the outer edge portion of the cover material 43 corresponds to a portion 22 a of the corresponding material 22.

  Then, the opening edge portion of the opening 42 and the outer edge portion of the cover material 43 superimposed on the opening 42 are bonded by the adhesive 21.

  In addition, the said cover material 43 may be the same structure as the said water shielding sheet 7, and a metal plate may be sufficient as it.

  In FIG. 5, at least three multilayer films 15 are juxtaposed to form the capping sheet 9. Each part 15a which is an edge part which these multilayer film materials 15 mutually oppose is made into the superposition part 33 of 3 sheets pile. In this case, the one located in the center in the vertical direction of the three overlapping layers of the overlapping portion 33 corresponds to a part 15a of the multilayer film material 15, and a part 15a of the other multilayer film material 15 is a part of the corresponding material 22, respectively. It corresponds to 22a.

  And the adhesive agent 21 discharged from the nozzle 30 of the said mixing supply apparatus 25 is apply | coated to each nonwoven fabric film forming material layer 17 in the said superimposition part 33. FIG. Then, the adhesive 21 penetrates into the nonwoven fabric film material layer 17, and the portions 15 a of the multilayer film materials 15 of the overlapping portion 33 are bonded to each other by the adhesive 21, and The nonwoven fabric film material layer 17 serves as a sealing material.

  In addition, you may combine the structure of each part in the said Example in light of the objective and effect of this invention.

DESCRIPTION OF SYMBOLS 1 Disposal site 2 Waste 3 Ground 6 Landfill area 7 Impermeable sheet 8 Impermeable landfill area 9 Capping sheet 10 Gas 11 Degassing tool 15 Multilayer film material 15a Part 16 Non-water-permeable film material layer 17 Nonwoven fabric film material layer 21 Adhesion Agent 22 Corresponding material 22a Part 33 Overlapping part

Claims (5)

A part in the surface direction of a multilayer film material having a non-water-permeable film material layer and a pair of non-woven film material layers bonded to the respective outer surfaces of the non-water-permeable film material layer corresponds to the multilayer film material. A multilayer film material adhering method for adhering with a part of a surface of a corresponding material provided and adhering with an adhesive,
The above-mentioned adhesive is a two-component reaction type adhesive in which the chemical reaction is started by mixing the two components with the main agent and the curing agent and the viscosity starts to increase,
The viscosity of the adhesive immediately after mixing the two liquids at the time of bonding is in a low viscosity range of 150 to 1000 mPa · s at an ambient temperature of 23 ° C., and the adhesive is 5 minutes after the mixing. A multilayer film material adhering method, wherein a high viscosity range of 2500 to 7000 mPa · s is obtained after a predetermined period of time elapses.   2. The multilayer film material bonding method according to claim 1, wherein a viscosity ratio of the main agent and the curing agent of the adhesive at an ambient temperature of 23 ° C. is set to 1.3: 1-3: 1.   The multilayer film material bonding method according to claim 2, wherein the adhesive is made of polyurethane.   The main component of the main agent of the adhesive is a polyol, the main component of the curing agent is an isocyanate, and the mass mixing ratio of the main agent and the curing agent is 2.5: 1-5: 1. The multilayer film material adhesion method according to claim 2.   2. The adhesive is applied from the outer surface to the already overlapped portion in which each part of the multilayer film material and the corresponding material is overlapped with each other within the predetermined period. 5. The multilayer film material adhesion method according to any one of items 1 to 4.

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