JP5147439B2 - Capping sheet for waste coating - Google Patents

Description

  The present invention relates to a capping sheet used in a waste disposal site and the manufacturing method thereof.

  In recent years, a large amount of waste has been illegally dumped. However, it may be difficult to immediately transfer a large amount of illegally dumped waste to a well-equipped disposal site. If such waste is left as it is, sewage is generated due to rainwater, etc. on the waste, and there is a problem of contaminating the soil where the waste is dumped. Covering waste with a capping sheet is becoming more common.

  Since the waste in such an illegal dumping site is transferred to a disposal site sometime, it is common that the capping sheet surface is not covered with soil when capping the waste. Therefore, the capping sheet applied to such a location is required to have excellent weather resistance because it is directly exposed to sunlight and wind and rain. In addition, gas or water vapor generated from waste is confined in a space covered with a capping sheet (hereinafter referred to as “capping space”), and the capping sheet may be torn by the expansion pressure of these gas or water vapor. Therefore, it is also required to have excellent moisture permeability.

As such a capping sheet, for example, Patent Document 1 discloses a capping sheet having weather resistance and waterproof moisture permeability.
JP 2005-81222 A

  When the covering region is large, it is necessary to join a plurality of capping sheets according to the size. Conventionally, a method has been employed in which the sheet itself is fused with an automatic fusing machine or the like to prevent water penetration from the joint. However, in the heat fusion method, since heat treatment is performed at a high temperature of 200 ° C. to 300 ° C., there is a problem that the porous resin sheet is damaged and the waterproof property of the capping sheet joining portion is impaired.

  The present invention has been made in view of the above circumstances, and its purpose is to provide a capping sheet for waste coating that has waterproof moisture permeability and weather resistance, and is excellent in waterproofness and bonding strength of the joint. It is in providing the manufacturing method.

  The capping sheet for waste covering according to the present invention that has achieved the above object has a plurality of waterproof sheets and a joining portion formed by joining the plurality of waterproof sheets by sewing processing. At least a part of the waterproof sheet is a waterproof and moisture-permeable laminate having a laminated structure of at least three layers in which the waterproof and moisture-permeable sheet is laminated and integrated between the first fiber sheet and the second fiber sheet, The water resistance level of the joint is 30 cm or more, and the joint strength is 350 N / 5 cm or more. By adopting such a configuration, the waste covering capping sheet of the present invention can maintain sufficient waterproofness because water permeation at the joint and damage to the joint due to external force can be suppressed.

  In addition, as a manufacturing method of the capping sheet for waste covering of the present invention, a step of temporarily fastening the end portions of the plurality of waterproof sheets with a double-sided tape and laminating, and a plurality of laminated waterproof sheets It is a manufacturing method characterized by having the process of sewing an edge part and forming a junction part. Also, the step of laminating the ends of the plurality of waterproof sheets, the step of forming the joints by sewing the ends of the plurality of waterproof sheets laminated using a heat-fusible sewing thread, and A method for producing a capping sheet for covering waste is also included in the present invention, which includes the step of heat-sealing the joint portion to melt the heat-fusible sewing thread.

  By adopting the manufacturing method, the porous resin sheet is not damaged by the heat fusion method and the waterproof property of the capping sheet joining portion is not impaired, and sufficient waterproof property can be maintained.

  The capping sheet for waste coating according to the present invention has waterproof moisture permeability and weather resistance, and is excellent in waterproofness and bonding strength of the joint, and is suitable for capping waste dumped as described above. It is.

  The waste coating capping sheet of the present invention has a plurality of waterproof sheets and a joint formed by joining the plurality of waterproof sheets by sewing processing, and at least a part of the plurality of waterproof sheets Is a waterproof and moisture-permeable laminate having a laminated structure of at least three layers in which the waterproof and moisture-permeable sheet is laminated and integrated between the first fiber sheet and the second fiber sheet, and the water resistance level of the joint portion Is 30 cm or more and the bonding strength is 350 N / 5 cm or more.

  FIG. 1 is an explanatory plan view illustrating an example of a capping sheet 11 for covering waste according to the present invention. The waste covering capping sheet of the present invention has a plurality of waterproof sheets 10 ′ and 10 ″ and a joint portion 4 formed by joining the plurality of waterproof sheets by sewing.

  First, a plurality of waterproof sheets used in the present invention will be described. At least some of the plurality of waterproof sheets used in the present invention have a waterproof and permeable sheet having a laminated structure of at least three layers in which a waterproof and moisture permeable sheet is laminated and integrated between a first fiber sheet and a second fiber sheet. It may be a wet laminate, for example, an embodiment in which the waterproof and moisture permeable laminate and a waterproof sheet other than the waterproof and moisture permeable laminate are used; the waterproof and moisture permeable laminate on all of the plurality of waterproof sheets The aspect which uses can be mentioned, It is preferable to use the said waterproof moisture-permeable laminated body for all the some waterproof sheets.

  FIG. 2 is a cross-sectional explanatory view illustrating an embodiment of the waterproof and moisture-permeable laminate 9 used in the present invention. In this aspect, the waterproof and moisture-permeable sheet 2 is laminated and integrated between the first fiber sheet 1 and the second fiber sheet 3.

  The waterproof and moisture-permeable sheet constituting the waterproof and moisture-permeable laminate imparts moisture permeability and waterproofness to the waterproof and moisture-permeable laminate.

  The waterproofness of the waterproof and moisture-permeable sheet is preferably 100 cm or more, more preferably 200 cm or more, and more preferably 500 cm or more, as measured by the water resistance test A method of JIS L 1092. More preferably it is. By using such a waterproof and moisture-permeable sheet having a water resistance level, the waterproof property of the waterproof and moisture-permeable laminate constituting the waste coating capping sheet of the present invention can be ensured.

As the moisture permeability of the waterproof and moisture permeable sheet, the moisture permeability measured in accordance with the JIS L 1099 A-1 method is preferably 100 g / m ² · 24 hr or more, and 1000 g / m ² · 24 hr or more. Is more preferably 5000 g / m ² · 24 hr or more. By using such a moisture-permeable waterproof and moisture-permeable sheet, moisture permeability of the waterproof and moisture-permeable laminate constituting the waste coating capping sheet of the present invention can be ensured.

  The waterproof and moisture-permeable sheet is recommended to be porous from the viewpoint of ensuring moisture permeability. For example, a porous sheet in which fine voids are formed by mixing a resin with inorganic fine particles such as calcium carbonate to form a sheet and stretching the sheet is exemplified. In particular, it is preferable to use a porous sheet produced by an inflation method as the waterproof and moisture permeable sheet. This is because, according to experience, a porous sheet manufactured by an inflation method has good adhesion between a first fiber sheet and a second fiber sheet, which will be described later, and thus the waterproof property of the waterproof and moisture-permeable laminate to be manufactured becomes high. .

  The waterproof and moisture-permeable sheet produced by the inflation method preferably has an average value of vertical and horizontal shrinkage at 80 ° C. of 5% or more, more preferably 10% or more, and 25% or less. Is preferable, and it is more preferable that it is 20% or less. When the average value of the vertical and horizontal shrinkage ratios at 80 ° C. is in the above range, the waterproof and moisture-permeable sheet has an appropriate elongation and is difficult to shrink over time, so that it is waterproof at the junction of the capping sheet for covering waste. Due to the shrinkage of the moisture-permeable sheet, it is possible to prevent a decrease in waterproofness with time.

  The material constituting the waterproof and moisture-permeable sheet is not particularly limited, but for example, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA); fluorine-based materials such as polytetrafluoroethylene and polyvinylidene fluoride Resins are preferred, and low density polyethylene is particularly preferred. As such a waterproof and moisture-permeable sheet, for example, commercially available products such as Microtex manufactured by Nitto Denko Corporation and Tetlatex manufactured by Donaldson Co., Ltd. can be used. It is also possible to use an SMS nonwoven fabric.

  In order to prevent damage to the waterproof and moisture permeable sheet due to external force at the time of laying, in particular to prevent damage to the waterproof and moisture permeable sheet at the joint portion of the capping sheet for waste coating, the waterproof and moisture permeable laminate It is preferable that the waterproof and moisture-permeable sheet constituting the sheet has an appropriate elongation at break and tear strength.

  The waterproof and moisture-permeable sheet preferably has a breaking elongation measured according to JIS L 1906 of 250% or more, more preferably 300% or more, and further preferably 400% or more.

  The waterproof and moisture-permeable sheet preferably has a tear strength measured according to the JIS K 7128 1 method of 0.75 N or more, more preferably 1.0 N or more, and 2.0 N or more. Further preferred.

  When the elongation at break or tear strength of the waterproof and moisture permeable sheet is equal to or higher than the lower limit, the waterproof and moisture permeable sheet is less likely to be damaged by an external force during laying. Since the moisture-permeable sheet is hardly damaged, the capping sheet for covering waste can maintain high waterproofness.

  Further, the thickness of the waterproof and moisture-permeable sheet is not particularly limited as long as the waterproofness and moisture permeability can be secured, but is preferably 50 μm or more, more preferably 80 μm or more, and preferably 200 μm or less. More preferably, it is 150 μm or less. It is recommended that the thickness of the waterproof and moisture-permeable sheet be in the above range from the viewpoint of balance of characteristics, cost, and workability.

The basis weight of the waterproof and moisture-permeable sheet is not particularly limited, but is preferably 50 g / m ² or more, more preferably 80 g / m ² or more, and preferably 200 g / m ² or less, 150 g / m ^2. More preferably, it is m ² or less. It is recommended that the weight per unit area of the waterproof and moisture permeable sheet is within the above range from the viewpoint of appropriate moisture permeability and durability over time.

  The first fiber sheet constituting the waterproof and moisture-permeable laminate is laminated on the surface side of the waterproof and moisture-permeable sheet. By using a 1st fiber sheet, an ultraviolet-ray can be interrupted | blocked and deterioration of the said waterproof moisture-permeable sheet can be suppressed.

  The first fiber sheet preferably has a light shielding rate of 90% or more, more preferably 95% or more, measured according to the JIS L 1055 A method. If the light shielding rate of the first fiber sheet is equal to or higher than the lower limit, the waterproof and moisture permeable sheet can be prevented from being exposed to ultraviolet rays by performing the construction with the first fiber sheet outside (opposite to the waste). Therefore, deterioration of the waterproof and moisture permeable sheet can be highly suppressed.

  The first fiber sheet is a sheet composed of fibers and is not particularly limited as long as the light shielding rate can be satisfied. For example, a woven fabric, a nonwoven fabric, a knitted fabric composed of various known fibers, Although a split cloth or the like can be used, it is preferable to use a non-woven fabric from the viewpoint of ease of work (hard to slip).

  The material of the fibers constituting the first fiber sheet is not particularly limited, and examples thereof include: polyesters such as polyethylene terephthalate and polybutylene terephthalate; aliphatic polyamides such as nylon 6, nylon 66, nylon 46, and nylon 12; aroma such as aramid Polyamides such as group polyamides; polyethylenes are common. Resins such as wholly aromatic polyesters, so-called ultrahigh molecular weight polyethylene, polyphenylene sulfide, polyether ketone, and the like can also be used as the material for the fibers. These materials may be used alone, or two or more of them may be mixed and used as long as the effects of the present invention are not impaired. Among these, in terms of cost, weather resistance, etc., fibers made from the polyesters illustrated above are preferable.

  The first fiber sheet is preferably colored in order to ensure the light shielding rate. As the dye to be used, those which are difficult to deteriorate during spinning are preferable. Specific examples include carbon black and inorganic pigments.

  Although there is no restriction | limiting in particular about a hue, Usually, since the 1st fiber sheet side colored with this pigment | dye becomes the outermost surface, the pigment | dye which becomes a suitable color according to the place where the capping sheet of this invention is applied. Just choose. Therefore, the coloring matter may be used alone, or a plurality of types may be mixed and used in order to adjust the hue.

  The first fiber sheet is preferably embossed to ensure wear durability.

  The thickness of the first fiber sheet is preferably 0.3 mm or more, more preferably 0.4 mm or more, preferably 1.0 mm or less, and more preferably 0.8 mm or less. . When the thickness of the first fiber sheet is within the above range, when a plurality of waterproof sheets are joined by sewing to produce a capping sheet for covering waste, the water permeation at the joint can be minimized. Sufficient waterproofness can be maintained after joining. Moreover, when using an adhesive tape mentioned later, since the layer of an adhesive tape is easy to bite in, the water resistance of a junction part can be improved.

The basis weight of the first fiber sheet is not particularly limited, but is preferably 70 g / m ² or more, more preferably 100 g / m ² or more, and preferably 300 g / m ² or less, 200 g / m ^2. More preferably, it is m ² or less. By setting the basis weight of the first fiber sheet within the above range, it is possible to ensure workability, flexibility, and a sufficient reinforcing effect. When the basis weight of the first fiber sheet is less than the above range, the effect of improving the strength of the capping sheet may be insufficient. On the other hand, if the basis weight of the first fiber sheet exceeds the above range, it is economically disadvantageous, and the capping sheet becomes hard and the workability tends to be lowered.

  Moreover, it is also preferable to form an anti-slip layer by partially joining the first fiber sheet with fibers having a diameter 10 times or more of the fibers constituting the sheet. When a soil layer is formed on the upper surface, it becomes difficult for the soil to slide down even on a slope.

  The illegally dumped waste may include waste such as needles. If a capping sheet for covering waste is applied to such an illegal dumping place, holes or tears may occur in the capping sheet, which may impair waterproofness. Therefore, in the present invention, as a protective layer, by adopting a structure formed by laminating the second fiber sheet on the waste side of the waterproof and moisture permeable sheet, when applied to an illegal dumping place having such a concern. However, the waterproof property of the capping sheet for covering waste can be effectively maintained.

  The second fiber sheet preferably has a penetration resistance measured in accordance with ASTM D 4833 of 200 N or more, and more preferably 300 N or more. By adopting the configuration including the second fiber sheet having a penetration resistance of 200 N or more, the waterproofness of the capping sheet for covering the waste can be effectively maintained when the sheet is laid.

  Further, the second fiber sheet is not particularly limited as long as it has the penetration resistance and can secure the post-moisture permeability of the waterproof and moisture-permeable laminate used in the present invention. Examples include non-woven fabrics and woven and knitted fabrics. The second fiber sheet may be the same as the first fiber sheet, but since the fiber sheet side is on the inside (waste side), the light shielding function is not necessary.

  The thickness of the second fiber sheet is not particularly limited, but is preferably 0.2 mm or more, more preferably 0.6 mm or more, and preferably 10.0 mm or less, and 5.0 mm or less. More preferably. By setting the thickness of the second fiber sheet within the above range, the waterproof property at the joint portion of the capping sheet for waste coating of the present invention can be maintained, and the appropriate flexibility and handling property of the capping sheet are also good. It can be.

The basis weight of the second fiber sheet is not particularly limited, but is preferably 50 g / m ² or more, more preferably 150 g / m ² or more, and preferably 1000 g / m ² or less, 500 g / m ^2. More preferably, it is m ² or less. By setting the basis weight of the second fiber sheet within the above range, it is possible to easily maintain the waterproof property at the joint portion of the capping sheet for waste coating of the present invention.

  The waterproof and moisture-permeable laminate used in the present invention has a laminated structure of at least three layers formed by laminating and integrating the above-described waterproof and moisture-permeable sheet between the first fiber sheet and the second fiber sheet.

  As a preferable aspect of the waterproof and moisture-permeable laminate, a waterproof and moisture-permeable sheet having a breaking elongation of 250% or more and a tear strength of 0.75 N or more is a first fiber sheet having a thickness of 0.3 to 1.0 mm, and a second fiber. Examples include a waterproof and moisture-permeable laminate having a laminate structure of at least three layers laminated and integrated between sheets. By adopting such a configuration, a waste coating capping sheet having excellent waterproofness and bonding strength of the bonded portion can be obtained by the manufacturing method described later.

  From the viewpoint of ensuring waterproofness, the waterproof and moisture-permeable laminate preferably has a water resistance level measured in accordance with the provisions of the water resistance test A method of JIS L 1092 of 30 cm or more, and preferably 100 cm or more. More preferably, it is 2000 cm or more. If it is a capping sheet for waste coating that employs a waterproof and moisture-permeable laminate with a water resistance level equal to or higher than the lower limit, rainwater will penetrate to the waste side even if it is used for capping waste etc. Can be sufficiently prevented, and contamination of soil under waste can be suppressed.

From the viewpoint of ensuring the moisture permeability, the waterproof and moisture-permeable laminate preferably has a moisture permeability measured according to the JIS L 1099 A-1 method of 100 g / m ² · 24 hr or more, and 1000 g / m ^2. More preferably 24 hr or more, and further preferably 3000 g / m ² · 24 hr or more. Wherein at higher moisture permeability The moisture permeability is large is good, practical upper limit is 10000g ^/ m 2 · 24hr, and more preferably 8000g ^/ m 2 · 24hr. If it is a capping sheet for waste covering that adopts a waterproof and moisture permeable laminate having a moisture permeability equal to or higher than the lower limit, it suppresses swelling due to pressure increase in the capping space due to generation of gas or water vapor from the waste, It is possible to prevent the capping sheet for waste coating from being torn.

  The method for integrating the laminated structure after laminating the waterproof and moisture permeable sheet between the first fiber sheet and the second fiber sheet is not particularly limited, and is a known method such as a heat fusion laminating method or an adhesive. A method using can be adopted. When using an adhesive, it is necessary to take care not to impair the moisture permeability. For example, it is recommended to use a hot-melt powder or a hot-melt fiber type adhesive to perform partial thermal bonding. The Moreover, in the said method, it is preferable that the heat sealing | fusion temperature or thermal bonding temperature is 60 degreeC or more, It is more preferable that it is 100 degreeC or more, It is preferable that it is 200 degrees C or less, It is 130 degrees C or less. Is more preferable. If the heat-sealing temperature or the heat-bonding temperature is within the above range, the waterproof and moisture-permeable sheet is not easily damaged due to the high temperature.

  As a waterproof and moisture-permeable laminate used in the present invention, it is also preferable to use a laminate in which a third sheet is laminated on the surface side of the first fiber sheet. The third sheet is recommended to have a penetration resistance measured in accordance with ASTM D 4833 of 200 N or more, more preferably 250 N or more, and even more preferably 300 N or more. If it is a capping sheet for waste covering that adopts a structure including a third sheet having an intrusion resistance of 200 N or more, the water resistance is unlikely to deteriorate over time, and when there is an operator walking on it, it is damaged by heavy machinery and earth and sand Less damage when covering.

  The third sheet is not particularly limited as long as it has the penetration resistance and can secure the moisture permeability of the waterproof and moisture-permeable laminate used in the present invention. For example, the third sheet is used for the exemplified first fiber sheet. A long fiber nonwoven fabric, a short fiber nonwoven fabric or the like made of a material can be used. Moreover, since this 3rd sheet side may become an outer side, what has light-shielding property is preferable, for example, it is recommended to employ | adopt what was colored similarly to the 1st fiber sheet.

  The thickness of the third sheet is not particularly limited, but is preferably 0.5 mm or more, more preferably 1.0 mm or more, preferably 3.0 mm or less, and 2.0 mm or less. It is more preferable. By setting the thickness of the third sheet within the above range, it is possible to prevent breakage and destruction caused by heavy machinery when there is an operator walking on the third sheet.

The basis weight of the third sheet is not particularly limited, but is preferably 50 g / m ² or more, more preferably 100 g / m ² or more, and preferably 3000 g / m ² or less, 2000 g / m. More preferably, it is ² or less. By setting the basis weight of the third fiber sheet within the above range, appropriate mechanical strength and durability can be maintained.

  The method for joining the third sheet to the first fiber sheet is not particularly limited, and there are various known methods described above as a method for integrating the laminated structure of the waterproof and moisture permeable sheet, the first fiber sheet, and the second fiber sheet. It can be adopted. In this case, it is preferable that the third sheet is not attached to the entire first fiber sheet, but is not joined in the vicinity of the sewing site, and is turned up at the time of sewing to carry out the sewing, and then covered after completion.

  The waterproof sheet other than the waterproof and moisture-permeable laminate used for the waste coating capping sheet of the present invention is not particularly limited, and for example, a vinyl chloride sheet, a polyethylene sheet, or the like can be used. . By using these waterproof sheets as part of the capping sheet for covering waste, there are cases where the joining cost can be reduced and the construction time can be shortened.

  Next, a joint portion formed by joining the plurality of waterproof sheets by sewing processing will be described.

  The joint part formed by joining a plurality of waterproof sheets in the present invention is formed by joining the ends of the plurality of waterproof sheets by sewing. By forming the joint portion by sewing, damage to the joint portion due to excessive heating is suppressed.

  The manner of sewing at the joint is not particularly limited as long as the necessary joint strength can be satisfied, and examples include the manner of sewing exemplified in FIGS. 3 and 4. FIG. 3 is an explanatory plan view illustrating a mode in which two portions are sewn in parallel with the longitudinal direction of the rectangular joint portion 4 formed by laminating the ends 6 ′ and 6 ″ of the waterproof sheets 10 ′ and 10 ″. 4 is an explanatory plan view illustrating a mode in which the end portions 6 ′ and 6 ″ of the waterproof sheets 10 ′ and 10 ″ are sewn in a diagonal shape of the rectangular joint portion 4 formed by stacking the end portions 6 ′ and 6 ″. It should be noted that the manner of sewing at the joint portion of the present invention is not limited to the manner shown in FIGS. 3 and 4, and can be appropriately adjusted according to the performance of the sewing machine.

  Moreover, in this invention, in order to ensure sufficient waterproofness of the said junction part, it is a preferable aspect to carry out the sealing process of the needle hole by sewing. As an aspect of the sealing treatment, for example, by using heat-fusible sewing threads, the ends of a plurality of waterproof sheets are joined together by sewing, and after sewing, heat treatment is performed to fuse the sewing threads. Mode for carrying out the stop treatment: Mode for temporarily fixing the ends of a plurality of waterproof sheets with double-sided tape and joining them together by sewing, and carrying out a sealing treatment with the adhesive of the double-sided tape; Adhesive tape or adhesive on the surface of the joint The aspect etc. which are provided can be mentioned. In addition, the aspect which combined these aspects is also a preferable aspect of this invention.

  The sewing thread used for the sewing process is not particularly limited, and for example, a polyester-based high-strength sewing thread, a nylon-based sewing thread, or the like can be used. In particular, as a heat-fusible sewing thread, the melting temperature is preferably 150 ° C. or lower, and more preferably 120 ° C. or lower. If it is a heat-fusible sewing thread having a melting temperature of 150 ° C. or lower, it can be easily melted by heat treatment described later, and the waterproof and moisture-permeable sheet constituting the waterproof and moisture-permeable laminate can be sealed without damage. Can do.

  As the double-sided tape used for temporarily fixing a plurality of waterproof sheets, a double-sided tape that has effects such as positioning of joints and prevention of wrinkles and also serves as a sealing process for needle holes generated by sewing processing is preferable. The adhesive used for the double-sided tape is not particularly limited. For example, it is preferable to use an acrylic adhesive or a butyl rubber adhesive. Although the width | variety of the said double-sided tape will not be specifically limited if a junction part can be covered, It is preferable that it is 50 mm or more, More preferably, it is 75 mm or more. Specific examples of the double-sided tape include double-sided tape No. 1 manufactured by Nitto Denko Corporation. 541.

  The joint portion preferably has a water resistance level measured in accordance with the provisions of JIS L 1092, water resistance test A method, of 30 cm or more, and more preferably 50 cm or more. When the water resistance level of the joint is 30 cm or more, the capping sheet for covering waste can suppress water permeation through the joint interface, so that sufficient waterproofness can be maintained even at the joint.

  The bonding portion preferably has a bonding strength of 350 N / 5 cm or more, more preferably 500 N / 5 cm or more, measured in accordance with JIS L 1906. When the joint strength of the joint is 350 N / 5 cm or more, the capping sheet for covering wastes can minimize the damage of the joint due to external force.

  Hereinafter, although the joining aspect of this invention is demonstrated, referring drawings, the joining aspect of this invention is not limited to the aspect shown in drawing.

  FIG. 5 is a cross-sectional explanatory view illustrating a cross-sectional structure of a joint formed using a double-sided tape. The ends 6 ′ and 6 ″ of the plurality of waterproof sheets 10 ′ and 10 ″ are temporarily fixed by the double-sided tape 5 and joined by the sewing thread 7. The double-sided tape has effects such as positioning of joints and prevention of wrinkles, and the adhesive layer of the double-sided tape also serves to seal needle holes by sewing.

  FIG. 6 is an explanatory cross-sectional view illustrating a cross-sectional structure of a joint formed using heat-fusible fibers. After the end portions 6 ′ and 6 ″ of the plurality of waterproof sheets 10 ′ and 10 ″ are sewn using a heat-fusible sewing thread, the joint portion is heat-treated to fuse the sewing thread ( (This is not shown in FIG. 6).

  FIGS. 7 and 8 are cross-sectional explanatory views for explaining the cross-sectional structure of the joint portion formed by further covering the surface of the joint portion illustrated in FIGS. 5 and 6 with the adhesive tape 8. The pressure-sensitive adhesive tape prevents the sewing thread from being directly exposed and deteriorates, can maintain the waterproofness by the sewing thread, and can further increase the bonding strength. Moreover, when an adhesive tape has waterproofness, the waterproofness of the junction part of the capping sheet for waste covering can also be improved further by using an adhesive tape.

The pressure-sensitive adhesive tape is formed by forming a pressure-sensitive adhesive layer on one side of a sheet. The material and forming method of the sheet constituting the pressure-sensitive adhesive tape are not particularly limited. For example, the material and forming method exemplified for the first fiber sheet can be used, but the workability (non-slip property) surface. Therefore, the sheet constituting the adhesive tape is preferably a nonwoven fabric. The sheet constituting the adhesive tape preferably has a basis weight of 150 g / m ² or more. With such a basis weight sheet, ultraviolet light exposure to the pressure-sensitive adhesive layer can be suppressed to some extent, and deterioration of the pressure-sensitive adhesive can be suppressed. From this point of view, it is recommended that the adhesive tape sheet is also colored in the same manner as the first fiber sheet. The details of coloring are as described above for the first fiber sheet. Furthermore, it is preferable that the sheet | seat of an adhesive tape is the same raw material and the same color as a 1st fiber sheet. The pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer is not particularly limited, and for example, a butyl rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a pressure-sensitive adhesive applied to a known cloth tape, or the like can be used. The method for forming the pressure-sensitive adhesive tape is not particularly limited, and examples thereof include a method for applying a pressure-sensitive adhesive layer to one side of a resin sheet.

  In addition, it is also suitable that the surface of a junction part is coat | covered with the adhesive agent. By covering the surface of the joint with an adhesive, the waterproofness and strength of the joint can be enhanced. The adhesive is not particularly limited as long as it has water resistance. For example, commercially available products such as Bond Woodwork # 10135 manufactured by Konishi Co., Ltd. can be used.

  Hereinafter, the manufacturing method of the capping sheet for waste covering of this invention is demonstrated. The capping sheet for covering waste according to the present invention is produced by sewing a plurality of waterproof sheets by sewing in accordance with the area of the area requiring the covering of the waste dumping place (including the waste disposal place). Joining by sewing may be done in advance at a factory or the like, but when the area requiring coating is large, it is often done at a waste disposal site. Examples of a method for sewing a plurality of waterproof sheets include a method of sewing using an electric sewing machine.

  Moreover, the width | variety (width | variety of a junction part) which laminates | stacks the edge parts of a some waterproof sheet is not specifically limited, However, It is preferable that it is 50 mm or more and 150 mm or less practically. Although the distance to the near edge part of the joined waterproof sheet | seat is not specifically limited for a sewing part, It is preferable that it is 10 mm or more and 75 mm or less practically.

  The method for manufacturing a capping sheet for covering waste according to the present invention includes a step of temporarily fixing and laminating the ends of the plurality of waterproof sheets with a double-sided tape, and the ends of the plurality of laminated waterproof sheets And a step of forming a joint portion by sewing. A method of temporarily fixing with a double-sided tape is not particularly limited, but is preferably sandwiched at a place to be sewn in order to serve as a sealing process.

  Also, the step of laminating the ends of the plurality of waterproof sheets, the step of forming the joined portions by sewing using the heat-fusible sewing thread between the ends of the laminated waterproof sheets, and A method of manufacturing a capping sheet for covering waste is also included in the present invention, which includes the step of heat-treating the joint portion to melt the heat-fusible sewing thread. By the sealing treatment using the heat-fusible sewing thread, the deterioration of the water resistance level of the joint over time is reduced. The method for heat-treating the joint is not particularly limited, and examples thereof include a method for heat-treating with a hot air blower (high temperature dryer) or an iron. The heat treatment temperature is not particularly limited as long as it is a temperature that does not damage the waterproof and moisture permeable sheet constituting the waterproof and moisture permeable laminate in the joint, but is preferably 200 ° C. or less, and preferably 150 ° C. or less. More preferably, it is 80 degreeC or more, and it is more preferable that it is 100 degreeC or more.

  By adopting the above manufacturing method, the porous resin sheet is not damaged by the heat fusion method, and the waterproofness of the capping sheet joint for waste coating is not impaired, and sufficient waterproofness is maintained at the joint. it can.

  Moreover, it is desirable that the surface of the joint is covered with an adhesive tape or an adhesive layer. The surface of the joint is the outside of the capping sheet for covering waste, that is, the side opposite to the waste side of the capping sheet for covering waste.

  The method for producing the pressure-sensitive adhesive tape is not particularly limited, and examples thereof include a method in which a pressure-sensitive adhesive is applied to one side of a resin sheet and is stuck on the surface of the joint. It is recommended that the adhesive tape cover the area from the sewing part to the end near the top waterproof sheet. The width | variety of an adhesive tape will not be specifically limited if the said area | region can be covered, For example, it is preferable that it is 50 mm or more. More preferably, it is 75 mm or more, More preferably, it is 100 mm or more.

  The waste coating capping sheet of the present invention covers the waste dumping site with the first fiber sheet surface of the waterproof and moisture-permeable laminate as the outside (if the third sheet is provided, the third sheet surface as the outside). And fixing by a known method (pinning or the like). Moreover, after covering the said area | region with the said some waterproof sheet, you may join by the said manufacturing method and may manufacture the capping sheet for waste covering. It is desirable to apply the adhesive tape also to a fixing hole portion provided in the capping sheet for fixing the capping sheet for covering waste with pins or the like.

  When the capping sheet for waste covering of the present invention is used for temporary capping at an illegal dumping site, for example, for illegally dumped waste, the surface covering is usually provided after the waste is coated for the above reasons. Not performed. Even when such a construction method is applied, the capping sheet for waste coating of the present invention has high weather resistance and can maintain waterproofness for a long period of time.

  In addition, the capping sheet for waste coating of the present invention is not only temporarily capped at the illegal dumping place as described above, but also has facilities and is in a waste disposal site where waste is landfilled semi-permanently. It is also suitable for capping. In this case, surface covering is usually performed.

  Hereinafter, the present invention will be described in detail based on examples. However, the following examples are not intended to limit the present invention, and all modifications made without departing from the spirit of the preceding and following descriptions are included in the technical scope of the present invention. The measurement method used in the present invention is as follows.

<Unit weight>
Measured according to JIS L 1906.

<Elongation at break>
Measured according to JIS L 1906.

<Tear strength>
Measured in accordance with JIS K 7128 1 method.

<Heat shrinkage>
Measured according to JIS L 1906. A 15 cm square sample is cut out, placed in an oven at 80 ° C. for 10 minutes, and the rate of change in length of the vertical and horizontal sides is measured, and the average value is adopted.

<Shading rate>
Measured according to JIS L 1055 A method.

<Penetration resistance>
Measured according to ASTM D-4833.

<Moisture permeability>
Measured according to JIS L 1099 A-1 method.

<Water resistance level>
Measured in accordance with JIS L 1092 water resistance test A method. Cut the sample into a circle that is slightly larger than the fixed holder, attach the end to molten paraffin, seal the end of the sheet, apply a silicone sealant where there is a gap, solidify, then set it in the holder, Measure the water head when water droplets are lifted up visually. n = 5 points are measured, and the lowest value is adopted.

<Joint strength>
Measured according to JIS L 1906. Set the joint so that it is in the middle of the upper and lower fixed chucks.

<Existence of swelling>
Capping sheet 6 months after the construction described below is judged to be swollen if there is a part that floats from the ground with a diameter of 200 mm or more and a height of 5 cm or more in the constructed state. To do.

Example 1
As the first fiber sheet, a polyester partially heat-bonded long-fiber non-woven fabric (100 g / m ² in basis weight, thickness 0.4 mm, light shielding rate of 99.8% or more) colored in black was used. On this first fiber sheet, a waterproof and moisture permeable film made of polyethylene by an inflation method as a waterproof and moisture permeable sheet ("Porum" manufactured by Tokuyama Corporation, high weather resistance and high elongation type: basis weight 100g / m ² , thickness 100 μm, elongation at break 530%, tear strength 2.1 N, average value of longitudinal and transverse heat shrinkage at 80 ° C. 16%) were laminated. Furthermore, a polyester needle punched nonwoven fabric (weight per unit area: 500 g / m ² , thickness: 5 mm) was laminated as the second fiber sheet on the opposite side of the first fiber sheet of the waterproof and moisture-permeable sheet. In addition, an acrylic pressure-sensitive adhesive (Sydenol TC-K3 resin manufactured by Seiden Chemical Co., Ltd.) is applied to the lamination of the first fiber sheet and the waterproof and moisture-permeable sheet and the lamination of the waterproof and moisture-permeable sheet and the second fiber sheet. Thus, the three laminates were integrated to produce a waterproof and moisture-permeable laminate 1 (width 2 m, length 10 m). About the waterproof moisture-permeable laminated body 1, the water resistance water level and moisture permeability were measured by the said method. The results are shown in Table 1.

  The five waterproof and moisture-permeable laminates 1 were provided with overlapping portions (width 10 cm) while the peripheral portion was temporarily fixed with a weight, and then the double-sided tape No. 1 manufactured by Nitto Denko Corporation was used for temporary adhesion of the sheet. 541 (30 mm in width) was sandwiched, and the overlapped portion was joined by sewing sewing using a 0th (3330 dtex) sewing thread made of polyester multifilament, to produce a capping sheet 1 for covering waste. About the capping sheet 1 for waste covering, the water-resistance water level and joining strength of the junction part were measured. The results are shown in Table 1.

  Using the capping sheet 1 for waste coating, the first fiber sheet was used as the surface side, and the 10 m square region was covered. The central part of the capping sheet 1 for covering waste covered is fixed with a washer sandwiched by a 15 cm nail from above, and the hole of the fixing part is also an adhesive tape (width 75 mm, polyester long fiber colored black) A non-woven fabric having a thickness of 50 to 100 μm was adhesively bonded with an adhesive tape obtained by applying Cybinol TC-K3 resin manufactured by Seiden Chemical Co., Ltd., which is an acrylic adhesive. Regarding the capping sheet 1 for covering waste after 6 months from the construction, the presence or absence of swelling was determined, and the water resistance level, the water resistance level of the joint and the bonding strength were measured. The results are shown in Table 1.

Example 2
Using the capping sheet 1 for waste coating produced in Example 1, the adhesive tape used in Example 1 was further applied to the joining surface from above on the joint on the first fiber sheet side, and the waste was coated. A capping sheet 2 was prepared. The capping sheet 2 for covering waste was constructed and evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 3
A plurality of the same as in Example 1 except that a double-sided tape was used and a thread made of a heat-fusible multifilament containing 30% low-melting nylon resin fiber (melting point 110 ° C.) and 70% polyester was used as a sewing thread. The waterproof and moisture-permeable laminate 1 was joined by sewing. Further, the sewing part was heat-treated with hot air at 150 ° C., and the sewing holes were sealed by melting the heat-fusible sewing thread. Thereafter, Bond Woodwork # 10135 manufactured by Konishi Co., Ltd. was sewn. A capping sheet 3 for covering waste was produced by applying an adhesive in an amount that swelled from above. Construction and evaluation were performed in the same manner as in Example 1 for the capping sheet assembly 3 for waste coating. The results are shown in Table 1.

Comparative Example 1
Using the waterproof and moisture-permeable laminate 1 produced in Example 1, a plurality of waterproof and moisture-permeable laminates 1 are joined by a thermal fusion method using a lyester (processing temperature of 280 ° C., processing speed of about 2.2 m / min). Thus, a capping sheet 4 for covering waste was produced. The capping sheet 4 for covering waste was constructed and evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2
The polyester partially heat-bonded long-fiber nonwoven fabric used as the first fiber sheet is changed to a polyester needle punched nonwoven fabric (weight per unit: 500 g / m ² , thickness: 5 mm, shading rate: 99.8% or more) and used as a waterproof and moisture-permeable sheet. Moisture-permeable and waterproof films formed from polyethylene by the inflation method with different properties obtained by the same production method using the same raw materials (weight per unit area 40 g / m ² , thickness 40 μm, elongation at break 480%, tear strength 2 A waterproof and moisture-permeable laminate 2 and a capping sheet 5 for covering waste were produced in the same manner as in Example 1 except that the average thermal shrinkage rate of 1N at 80 ° C. was changed to 18%. . For the waterproof and moisture-permeable laminate 2, the water resistance level and moisture permeability were measured in the same manner as in Example 1. Moreover, about the capping sheet 5 for waste covering, construction and evaluation were performed by the same method as Example 1. The results are shown in Table 1.

Comparative Example 3
Moisture permeable and waterproof film formed from polyethylene used as waterproof and moisture permeable sheet by inflation method, polyethylene formed by biaxial stretching method (40 g / m ² basis weight, thickness 40 μm, elongation at break 220%, tearing The waterproof and moisture-permeable laminate 3 and the waste coating capping sheet 6 were prepared in the same manner as in Example 1 except that the strength was changed to 0.7 N and the average value of the horizontal and vertical heat shrinkage at 80 ° C. was 3%. Produced. For the waterproof and moisture-permeable laminate 3, the water resistance level and moisture permeability were measured in the same manner as in Example 1. Moreover, about the capping sheet 6 for waste covering, construction and evaluation were performed by the same method as Example 1. The results are shown in Table 1.

Comparative Example 4
A waterproof and moisture permeable film formed from polyethylene used as a waterproof and moisture permeable sheet by an inflation method, and formed from polypropylene by a biaxial stretching method (100 g / m ² basis weight, thickness 100 μm, elongation at break 55%, tear strength) The waterproof and moisture-permeable laminate 4 and the waste coating capping sheet 7 were prepared in the same manner as in Example 1 except that the average thermal shrinkage ratio of 0.1 N at 80 ° C. was changed to 1%. did. For the waterproof and moisture-permeable laminate 4, the water resistance level and moisture permeability were measured in the same manner as in Example 1. Moreover, about the capping sheet 7 for waste covering, construction and evaluation were performed by the same method as Example 1. The results are shown in Table 1.

  In Examples 1 to 3, each of the waterproof and moisture-permeable laminates has a first fiber sheet having a thickness of 0.3 to 1.0 mm, a waterproof property having good waterproof and moisture permeability, appropriate elongation at break, tear strength, and the like. The structure which has a moisture-permeable sheet and a 2nd fiber sheet was employ | adopted, and the capping sheet for a waste covering was produced by sewing using the waterproof moisture-permeable laminated body which has this structure. For this reason, the capping sheet for waste covering in Examples 1 to 3 has excellent waterproof and moisture permeability and excellent water resistance and bonding strength at the joint part even at the time of construction / after six months from construction. It was.

  In addition, the waste coating capping sheet in Example 2 is the waste coating capping sheet prepared in Example 1, and further adhesive tape is applied to the joint. Since the adhesive tape has a function as a waterproof layer, the water resistance of the joint part of the capping sheet for waste covering in Example 2 is the water resistance of the joint part at the time of construction / after 6 months from construction. Especially excellent.

  In addition, the capping sheet for waste covering in Example 3 uses a heat-fusible sewing thread, and after performing the sealing process by fusing the sewing thread by heat treatment after the sewing process, In addition, a waterproof layer was applied. The waste coating capping sheet formed in this way is bonded to the waste coating capping sheet in Examples 1 and 2 using a non-fusible sewing thread and a double-sided tape as a sealing treatment means. Although the water resistance of the part was inferior, it was found that the deterioration of the water resistance with time was small.

  On the other hand, even with the waterproof and moisture-permeable laminate having the same configuration as in Examples 1 to 3, the capping sheet for waste coating produced in Comparative Example 1 in which the heat fusion method was used as the joining method, The waterproof and moisture-permeable sheet at the joint was damaged by the lysers, and the waterproofness of the joint was impaired, so the water resistance of the joint was extremely inferior at the time of construction / after 6 months from construction.

  In addition, in the capping sheet for waste covering produced in Comparative Example 2 using the first fiber sheet having a thickness of more than 1.0 mm, the permeation of water at the joint portion could not be suppressed. After a month, the water resistance of the joint was extremely poor. In addition, in the capping sheet for covering wastes of Comparative Examples 3 and 4 using a waterproof and moisture-permeable sheet having a breaking elongation of less than 250% and a tear strength of less than 0.75N, the joint portion was damaged by external force during laying. As a result, the water resistance of the joint was extremely inferior at the time of construction / after 6 months from construction.

It is a plane explanatory view of the capping sheet for waste covering of the present invention. It is sectional explanatory drawing which illustrates the aspect of the waterproof moisture-permeable laminated body of this invention. It is plane explanatory drawing which illustrates the sewing state of the junction part of the capping sheet for waste covering of this invention. It is plane explanatory drawing which illustrates the sewing state of the junction part of the capping sheet for waste covering of this invention. It is sectional explanatory drawing which illustrates the joining state of the capping sheet for waste covering of this invention. It is sectional explanatory drawing which illustrates the joining state of the capping sheet for waste covering of this invention. It is sectional explanatory drawing which illustrates the joining state of the capping sheet for waste covering of this invention. It is sectional explanatory drawing which illustrates the joining state of the capping sheet for waste covering of this invention.

Explanation of symbols

  1: 1st fiber sheet, 2: Waterproof moisture-permeable sheet, 3: 2nd fiber sheet, 4: Joining part, 5: Double-sided tape, 6 ′, 6 ″: End of waterproof sheet, 7, 7 ′: Sewing Yarn, 8: Adhesive tape, 9: Waterproof and moisture-permeable laminate, 10 ', 10 ": Waterproof sheet, 11: Capping sheet for waste coating

Claims (9)

A waste covering capping sheet having a plurality of waterproof sheets and a joint formed by joining the plurality of waterproof sheets by sewing processing,
At least a part of the plurality of waterproof sheets is a waterproof and moisture-permeable laminate having a laminated structure of at least three layers in which a waterproof and moisture-permeable sheet is laminated and integrated between a first fiber sheet and a second fiber sheet. There,
A capping sheet for waste coating, wherein the joint has a water resistance level of 30 cm or more and a joining strength of 350 N / 5 cm or more.   In the waterproof and moisture-permeable laminate, the waterproof and moisture-permeable sheet having a breaking elongation of 250% or more and a tear strength of 0.75 N or more is interposed between the first fiber sheet having a thickness of 0.3 mm to 1.0 mm and the second fiber sheet. The capping sheet for waste coating according to claim 1, wherein the capping sheet has a laminated structure of at least three layers formed by lamination and has a water resistance level of 30 cm or more.   The waste covering capping sheet according to claim 1, wherein the joining portion is formed by temporarily fastening ends of the plurality of waterproof sheets with a double-sided tape and joining them by sewing.   The said joining part is joined by sewing using a heat-fusible sewing thread, and is sealed by performing heat treatment after sewing to fuse the sewing thread. A capping sheet for covering waste as described in the paragraph.   The waste-capping sheet according to any one of claims 1 to 4, wherein the joint portion is coated on the surface with an adhesive tape or an adhesive.   The waterproof and moisture-permeable sheet is a porous sheet produced by an inflation method and having an average value of vertical and horizontal shrinkage at 80 ° C. of 5% to 25%, and has a thickness of 50 μm to 200 μm. The capping sheet for waste covering as described in any one of these. The first fiber sheet is a light blocking ratio of 90% or more, capping sheet for waste coating according to any one of claims 1 to 6 basis weight is ^{70g / m 2 ~300g / m 2} .   The capping sheet for waste coating according to any one of claims 1 to 7, wherein the first fiber sheet is colored using at least one kind of carbon black or inorganic pigment. Said second fiber sheet is a thick 0.2Mm～10.0Mm, basis weight for waste coating according to any one of claims 1-8 is ^50g / ^{m 2 ~1000g} / m 2 Capping sheet.

Images