JP5669969B1 - Waterproof sheet - Google Patents

Abstract

The present invention provides a water-proof laminated sheet that has waterproofness, moisture permeability, and excellent nail hole water-stopping properties and can be manufactured at low cost. A water-proof laminated sheet 10 having a flexible moisture-permeable waterproof film 13 and fixed to a building material by penetration of a screw nail has adhesive layers 12 and 14 sandwiching the moisture-permeable waterproof film 13. , Comprising a web made of a hot melt adhesive and having ultrafine fibers 12a14a entangled with a screw nail, and a non-woven base sheet 11 is laminated via the adhesive layer 12, and the non-woven surface sheet via the adhesive layer 14 15 is laminated. [Selection] Figure 1

Description

  The present invention relates to a water-proof laminated sheet that has waterproofness and moisture permeability and has excellent nail-hole water-proof properties that prevent rainwater from entering from the nail holes.

  Due to the intrusion of rainwater into the house and the dew condensation that occurs in the outer wall and behind the shed due to water vapor generated from the human body and heating, the wood that is the housing of the house will decay. In order to prevent this, a moisture-permeable waterproof sheet having waterproof properties and moisture-permeable properties is used as a base for roofs and outer walls. This moisture permeable waterproof sheet is fixed by driving a nail or spelling needle penetrating it into a field board or a wall board. For this reason, in addition to moisture permeability and waterproofness, a moisture-permeable waterproof sheet must also have a nail hole water stop property so that rainwater may not enter from the gap between the nail hole and the nail.

  Patent Literature 1 discloses a moisture permeable waterproof sheet for building materials in which a porous film having moisture permeability and waterproof properties and a nonwoven fabric are bonded and laminated by an adhesive resin. The adhesive resin forms a plurality of parallel stripes in plan view, and is impregnated into the nonwoven fabric with a gap of 0.1 to 1 mm. This moisture permeable waterproof sheet for building materials exhibits nail hole water-stopping properties when the adhesive resin is in close contact with a nail or the like penetrating the adhesive resin.

JP 2010-184451 A

  However, when a nail or the like penetrates the gap between the adhesive resins, the adhesive resin cannot adhere to the nail or the like. Also, if the nail is a screw nail or wood screw having a spiral groove on its body surface, even if the screw resin penetrates the adhesive resin, the adhesive resin adheres to the screw nail because of the groove it has. Can not. Conventional moisture-permeable waterproof sheets have not had sufficient nail hole water resistance. When the non-woven fabric is impregnated with the adhesive resin without any gap, sufficient nail hole water resistance is obtained, but the pores of the porous film are blocked by the adhesive resin, so that the moisture permeability is impaired.

  It is conceivable to improve the nail hole water stoppage by using a nonwoven fabric formed of extra fine fibers or a nonwoven fabric having a large basis weight for the moisture-permeable waterproof sheet. However, since such a nonwoven fabric is expensive, the manufacturing cost of a moisture-permeable waterproof sheet is increased.

  Moisture permeable waterproof sheets used for roofs where the outdoor side is exposed to rainfall and water vapor is likely to accumulate on the indoor side, in addition to waterproofness and moisture permeability, have excellent nail hole water resistance that prevents rainwater from entering through the nail holes. In addition, it has been desired to be able to be manufactured at low cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a water-proof laminated sheet having waterproofness, moisture permeability, and excellent nail hole water-stopping properties.

The water-proof laminated sheet of the present invention made to achieve the above object is a water-proof laminated sheet that has a flexible moisture-permeable waterproof film and is fixed to a building material by penetration of screw nails, The adhesive layer sandwiching the moisture permeable waterproof film is made of a hot melt adhesive that becomes a hot melt by melting while having a polyolefin or polyester as a main component, and includes a web that maintains a fiber shape that is in close contact with the screw nails. viewed while the hot melt adhesive is bonded to the left nonwoven base sheet and the nonwoven facing sheet of the uncured state of the hot melt prior to complete cure, said through one of the adhesive layer not woven base sheets are stacked, in which said nonwoven topsheet via the other of the adhesive layer is laminated.

  In the water-stop laminate sheet, the average diameter of the fibers is preferably 30 μm at the maximum.

The water-stop laminate sheet preferably has a weight of the web of at least 20 g / m ² .

  The water-stop laminate sheet is preferably a melt blown web, a flash spun web, an electrostatic laminate web, or a burst fiber web to which the web has adhesiveness.

In the water-stop laminate sheet, the adhesive layer may contain a water-absorbing resin .

  In the waterproof sheet, the building material may be a field board.

A method for producing a water- proof laminated sheet is a non-woven base sheet, a moisture permeable waterproof film and a non-woven surface sheet that remain uncured in a hot melt state before being completely cured after being melted with polyolefin or polyester as a main component. by melt blowing the hot melt adhesive to stick, after forming an adhesive layer comprising a web which maintains the fibrous form, bonded to the moisture-permeable waterproof film to the adhesive layer, the said moisture-permeable waterproof film by melt blowing the hot melt adhesive of the same quality of hot melt adhesives, to another adhesive layer comprising a web which maintains the formed fiber form, in which bonding the nonwoven topsheet.

  In the water-stop laminate sheet of the present invention, since the adhesive layer includes a web made of a hot melt adhesive, the melt blown fibers form a gap that allows water vapor to pass through and adheres to the screw nails. It has moisture permeability and excellent nail hole water resistance. Moreover, since this moisture-proof laminated sheet is laminated with a moisture permeable waterproof film, it also has waterproof properties. As described above, since the water-proof laminated sheet of the present invention has excellent nail hole water-proof, moisture-permeable and waterproof properties, it is possible to reliably prevent rainwater from entering the house from the roof or wall, and at the same time. It is possible to prevent the occurrence of condensation by allowing indoor water vapor to permeate.

In this waterproof sheet, when the basis weight of the web of the adhesive layer is at least 20 g / m ² or the average diameter of the fibers of this web is 30 μm at the maximum, innumerable ultrafine fibers are entangled with the screw nails. Since the nail hole is securely closed, the water resistance of the nail hole can be further improved.

  When the adhesive layer web is a melt blown web, this water-stop laminate sheet can easily and inexpensively produce ultrafine fibers that exhibit water-stop.

  When the material of each member of the water-stopping laminated sheet is polyolefin, the material is excellent in heat resistance, and therefore can be suitably used for a roof underneath requiring high heat resistance. Further, since recycling is easy, the amount of industrial waste can be reduced.

  According to this method for producing a water-stopping laminated sheet, a hot-melt adhesive is melt blown laminated to form an adhesive layer, so that a water-stopping laminated sheet having excellent nail hole water-stopping properties can be easily produced. it can.

It is a schematic cross section which shows one form of the water stop laminated sheet to which this invention is applied. It is a model fragmentary sectional view which shows a mode that the water-stop laminated sheet to which this invention is applied is fixed to the field board by penetration of a screw nail. It is a schematic diagram which shows the manufacturing method of the waterproofing laminated sheet to which this invention is applied. It is a partially notched perspective view which shows the usage method of the water stop laminated sheet to which this invention is applied. It is a model fragmentary sectional view of a nail hole water-stopping test apparatus.

  Hereinafter, although the form for implementing this invention is demonstrated in detail, the scope of the present invention is not limited to these forms.

  A schematic cross-sectional view of one embodiment of the water-stop laminate sheet 10 of the present invention is shown in FIG. The water-stop laminate sheet 10 is a laminate in which a nonwoven base sheet 11, adhesive layers 12 and 14, a moisture permeable waterproof film 13, and a nonwoven surface sheet 15 are laminated. Since these members are thin sheets or films, the water-stop laminate sheet 10 is soft and flexible. The water-stop laminate sheet 10 is fixed to a building material such as a field board or a wall board when a screw nail penetrates. In addition, a screw nail means the fastener which penetrates and fixes the water-stop laminated sheet 10 like a screw, a nail, and a spelling needle here.

  A porous moisture-permeable waterproof film 13 made of polyethylene is sandwiched between the adhesive layers 12 and 14. A non-woven base sheet 11 is laminated via an adhesive layer 12 laminated on one side of the moisture permeable waterproof film 13, and a non-woven base sheet 11 is laminated via an adhesive layer 14 laminated on the other side of the moisture permeable waterproof film 13. A woven surface sheet 15 is laminated. Both the nonwoven base sheet 11 and the nonwoven surface sheet 15 are polypropylene nonwoven fabrics.

  The adhesive layers 12 and 14 are melt blown webs made of a hot melt adhesive. The melt blow method which is one of the manufacturing methods of a nonwoven fabric sprays molten resin with hot air toward a target from a die. Thereby, a meltblown web consisting of ultrafine fibers and having a uniform fiber diameter and thickness can be formed on the target. Therefore, the adhesive layers 12 and 14 have innumerable ultrafine fibers 12a and 14a.

  The average diameter of the ultrafine fibers 12a and 14a is preferably 30 μm at the maximum. As a result, the ultrafine fibers 12a and 14a are entangled closely with the screw nail 40 and closely contact each other to close the nail hole P (see FIG. 2), so that the water-stop laminate sheet 10 exhibits excellent water-stop properties. On the other hand, if the average diameter is larger than this, the web fibers are only loosely entangled with the screw nail 40, so that sufficient nail hole water stoppage cannot be obtained.

The basis weight of the melt blown web forming the adhesive layers 12 and 14 is preferably 20 g / m ² or more. Thereby, since the ultrafine fibers 12a and 14a that are densely present in the adhesive layers 12 and 14 are entangled in a large amount with the screw nail 40, the water-stop laminate sheet 10 exhibits excellent water-stop properties. On the other hand, if the basis weight is smaller than this, since the amount of fibers entangled with the screw nail 40 is small, sufficient nail hole water stoppage cannot be obtained. On the other hand, even if the basis weight is too large, it is not possible to expect further improvement in the water resistance of the nail hole, and more fibers are wasted, which is uneconomical. Therefore, the basis weight is preferably 30 g / m ² at the maximum.

  The adhesive layers 12 and 14 have innumerable fine holes formed by the ultrafine fibers 12a and 14a intersecting or entangled in a complicated manner. These micropores have an average diameter of 0.1 to 0.3 μm. Therefore, the micropores pass through water vapor particles having a diameter of nm order, but do not pass through rainwater having a diameter of several hundreds μm to several mm. As a result, the adhesive layers 12 and 14 have moisture permeability and waterproofness in addition to strong adhesiveness.

  The hot melt adhesive is a polyolefin-based hot melt adhesive whose main component is polypropylene. The polyolefin-based hot melt adhesive has high heat resistance. Therefore, even if the non-woven base sheet 11 or the non-woven surface sheet 15 is pressed and adhered to the adhesive layers 12 and 14 that are not completely cured immediately after being melt blown laminated, the ultrafine fibers 12a and 14a are The fiber shape can be maintained. As a result, the ultrafine fibers 12a and 14a can be entangled and closely attached to the screw nail 40. Even if exposed to the conditions of 90 ° C. ± 2 ° C. for 7 weeks or 80 ° C. ± 2 ° C. for 14 weeks, which are the heat treatment conditions specified in JIS A 6111, the ultrafine fibers 12a and 14a are not softened. The shape and adhesive strength can be maintained.

  Furthermore, since the adhesive layers 12 and 14 made of a polypropylene-based hot melt adhesive have good wettability with respect to polyolefin, the non-woven base sheet 11, the non-woven surface sheet 15, and the moisture-permeable waterproof film 13 In addition to adhering firmly, they can be easily recycled together. Therefore, the water-stop laminate sheet 10 contributes to the reduction of industrial waste.

  FIG. 2 is a partial schematic cross-sectional view showing a state in which the water-stopping laminated sheet 10 is fixed to the base plate 20 by the screw nails 40 penetrating the water-stopping laminated sheet 10. The water-stop laminate sheet 10 is fixed to the field board 20 by screw nails 40 together with the ventilation mat 30 placed thereon and the pier 61a placed thereon.

  The ventilation mat 30 has a resin corrugated net 32 sandwiched between non-woven liner sheets 31. The airless mat 30 forms an air layer between the water-stop laminate sheet 10 and the pier 61a. The ventilation mat 30 prevents the formation of condensation on the field board 20 by releasing the water vapor in the house 60 to the outside of the house 60 through this air layer (see FIG. 4).

  The screw nail 40 has a sharply pointed tip 41, a columnar body 42 having a spiral groove 42 a on the surface, and a head 43 having a diameter larger than that of the body 42. When the upper end surface of the head 43 is struck by a hammer or the like and the screw nail 40 is pierced into the field board 20, the body part 42 is driven into the field board 20 while rotating with the spiral groove 42a. As the spiral groove 42 a bites into the field plate 20, the screw nail 40 is not easily removed from the field plate 20.

  A nail hole P is formed in the water-stopping laminated sheet 10 by the tip portion 41 being pierced and the body portion 42 penetrating. Each member of the water-stop laminate sheet 10 is pulled by the driving of the screw nail 40 and is slightly crushed toward the field plate 20 around the nail hole P. The ultrafine fibers 12 a and 14 a are dragged from the adhesive layers 12 and 14 by being caught by the distal end portion 41. Further, the ultrafine fibers 12a and 14a are entangled and stuck to the spiral groove 42a so as to accompany the trunk portion 42 penetrating the water blocking laminated sheet 10 while rotating. Thereby, the ultrafine fibers 12 a and 14 a securely close the gaps between the adhesive layers 12 and 14, the moisture permeable waterproof film 13, the nonwoven base sheet 11, and the body portion 42. As a result, most of the nail holes P are blocked and rainwater does not enter, so that the water-stop laminate sheet 10 exhibits excellent nail-hole water-stop.

  As described above, the water-stop laminate sheet 10 can prevent rainwater from entering, and also has moisture permeability, thereby releasing the water vapor accumulated in the back of the hut to the outside of the house 60 (see FIG. 4). Condensation can be prevented from occurring. Accordingly, the waterproof sheet 10 does not rot the base plate 20.

  With reference to FIG. 3, a method for producing the water-stop laminate sheet 10 will be described.

  First, the nonwoven base sheet 11 is set on the supply roll 55, and the moisture permeable waterproof film 13 is set on another supply roll 57. Polypropylene hot melt adhesive pellets 51 are charged into an applicator 52 and melted at a high temperature. The non-woven base sheet 11 is fed out from the supply roll 55 by operating the conveyor 56.

  Next, the molten hot melt adhesive is sent to the die 53. A hot melt adhesive is sprayed onto the nonwoven base sheet 11 on the conveyor 56 together with high-speed hot air 54 to form the adhesive layer 12 that is a meltblown web. Further, the moisture permeable waterproof film 13 fed from the supply roll 57 is pressed against the uncured adhesive layer 12 by the laminating roll 58. Thereby, the non-woven base sheet 11 and the moisture permeable waterproof film 13 are bonded and laminated together by adhesion. The laminated sheet is taken up by a take-up roll 59.

  Next, this laminated sheet is set on the supply roll 55, and the non-woven surface sheet 15 is set on another supply roll 57. Similarly to the above, the laminated sheet is fed out from the supply roll 55 by the conveyor 56, and the hot melt adhesive is sprayed on the moisture permeable waterproof film 13 of the laminated sheet to form the adhesive layer 14. The non-woven surface sheet 15 fed out from the supply roll 57 is pressed and bonded to the laminating roll 58. Thereby, the water-stop laminate sheet 10 is completed. This is taken up by a take-up roll 59.

  FIG. 4 shows a partially cutaway perspective view of a state in which the water-stop laminate sheet 10 is used in a wooden house 60. The water-stop laminate sheet 10 is a roof base uniformly laid on the field board 20. The ventilation mat 30 is laid thereon, and the pier 61a is fixed to the base plate 20 by the screw nails 40 together with the water-proof laminated sheet 10 and the ventilation mat 30. A slate 61b is fixed to the pier 61a.

  The roof 61 is exposed to high temperatures by receiving direct sunlight for a long time in the summer. Since the adhesive layers 12 and 14 have high heat resistance, the adhesion between the nonwoven base sheet 11 and the nonwoven surface sheet 15 and the moisture permeable waterproof film 13 can be maintained even at high temperatures in summer. it can.

  Further, since the roof 61 partitions the outside of the cold house 60 and the inside of the warm house 60 by heating or the like in the winter season, condensation easily occurs on the field board 20. Since the water-proof laminated sheet 10 has moisture permeability, the water vapor in the house 60 is discharged outside the house 60 and does not cause dew condensation on the field board 20.

  Furthermore, the roof 61 is sometimes exposed to heavy rain. Since the water-stop laminate sheet 10 has nail-hole water-stopping manifested by the ultrafine fibers 12a and 14a entangled with and closely attached to the screw nail 40 and the waterproof property by the moisture-permeable waterproof film 13, Do not allow rainwater to enter.

  The water-stop laminate sheet 10 is suitably used as a base for the roof 61 that is exposed to such severe conditions.

  On the other hand, the water-stop laminate sheet 10 can be used as a base for the outer wall 62 by being fixed so as to cover the wall plate 62a. In this case, the outer wall 62 is formed by applying the lath 62b, the mortar 62c, and the coating film 62d on the water-stopping laminated sheet 10. Even when the water-proof laminate sheet 10 is used for the outer wall 62, rainwater does not enter the outer wall 62 due to excellent water-proof and nail-hole water resistance and waterproofness, as is the case with the base of the roof 61. Condensation does not occur due to moisture. Thereby, the frame of the wooden house 60 such as the field board 20 and the wall board 62a is not decayed by rainwater intrusion or condensation.

  The adhesive layers 12 and 14 can be manufactured not only by the melt blown method but also by the flash spinning method, the electrostatic lamination method, or the burst fiber method. Any of the ultrafine fibers 12a and 14a manufactured by any manufacturing method can be entangled with the screw nail 40 and closely adhered thereto.

  As a main component of the polyolefin-based hot melt adhesive forming the ultrafine fibers 12a and 14a, a homopolymer such as polypropylene has been mentioned. In addition, a propylene-α olefin copolymer, an ethylene-α olefin copolymer, and the like are used. An α-olefin copolymer can be preferably used.

  The main components of the hot-melt adhesive forming the ultrafine fibers 12a and 14a are, in addition to polyolefins such as polypropylene, polyesters such as polyethylene terephthalate; polyamides such as aramid: natural rubber, synthetic rubber, polybutadiene elastomer, styrene -Elastomers such as butadiene elastomers, styrene-isoprene elastomers, and styrene-isobutylene elastomers; ethylene vinyl acetate can be used. These may be used alone or in combination. The elastomer can enter the gap between the water-stop laminate sheet 10 and the screw nail 40 while being elastically deformed to securely close the gap, so that the nail-hole water stop can be further improved. According to polyester or polyamide, the heat resistance of the adhesive layers 12 and 14 can be further improved.

  The webs forming the adhesive layers 12 and 14 may be the same or different. The adhesive layers 12 and 14 may contain a water absorbent resin such as acrylic acid. According to this, since the adhesive layers 12 and 14 absorb the rainwater that has passed through the nonwoven surface sheet 15, it is possible to more reliably prevent the rainwater from entering the field board 20 and the wall board 62a.

  The nonwoven base sheet 11 and the nonwoven surface sheet 15 impart strength to the water-stop laminate sheet 10. Therefore, it is preferable that the nonwoven fabric which forms the nonwoven base sheet 11 and the nonwoven surface sheet 15 does not have the anisotropy of an intensity | strength or elongation because the fiber is laminated | stacked at random. The nonwoven base sheet 11 and the nonwoven surface sheet 15 may be embossed. Thereby, the tensile strength, tear strength, water pressure resistance, and flexibility of the water-stop laminate sheet 10 can be improved. The water-stop laminate sheet 10 having high flexibility, tensile strength, and the like can facilitate the work of laying on the base plate 20 or covering the wall plate 62a. Further, aluminum that improves the heat shielding property may be deposited on the nonwoven surface sheet 15.

  Specific examples of the porous moisture-permeable waterproof film 13 include Tokuyama Corporation's Porum (registered trademark).

  As a fastener for fixing the water-stop laminate sheet 10, the screw nail 40 is shown in FIG. 2, but other examples include a smooth nail, a ring nail, and a barb nail. In addition to nails, wood screws and spelling needles can also be used. The ultrafine fibers 12a and 14a can be entangled and adhered to any fastener.

  Below, the Example of the water-stopping laminated sheet of this invention and the comparative example of the sample which does not apply this invention are shown.

Example 1
The water-stop laminate sheet of Example 1 was produced as follows. An olefin hot-melt adhesive whose main component is an α-olefin copolymer was melted at 180 ° C. This hot melt adhesive was sprayed together with hot air at a discharge rate of 2.5 kg / hour from a die onto a non-woven base sheet fed from a supply roll at a feed speed of 8.3 m / min. At this time, the flow rate of hot air was set to 1.3 m ³ / min. As a result, a web adhesive layer having a basis weight of 20 g / m ² and having ultrafine fibers having an average diameter of 30 μm was obtained. A moisture-permeable waterproof film was laminated on the semi-cured adhesive layer. A web adhesive layer was further produced in the same manner as described above, and then a surface nonwoven sheet was laminated to obtain a water-stop laminate sheet of Example 1.

( Reference Example 1 )
The adhesive layer was the same as in Example 1 except that a rubber-based hot-melt adhesive mainly composed of a styrene-isobutylene block copolymer was used as the hot-melt adhesive, and that the melting temperature thereof was 120 ° C. Was made. Thereby, the water-proof laminated sheet of Reference Example 1 having a basis weight of the adhesive layer of 20 g / m ² and an average diameter of the ultrafine fibers of 20 μm was obtained.

(Comparative Example 1)
A rubber-based hot-melt adhesive mainly composed of a styrene-isobutylene block copolymer was used as a hot-melt adhesive, its melting temperature was 120 ° C., and the feeding speed was 16.5 m / min. Except for this, an adhesive layer was prepared in the same manner as in Example 1. Thereby, the fabric weight of the adhesive layer was 10 g / m < ² >, and the water-resistant laminated sheet of the comparative example 1 whose average diameter of an ultrafine fiber is 20 micrometers was obtained.

(Comparative Example 2)
An adhesive layer was prepared in the same manner as in Example 1 except that the feeding speed of the nonwoven base sheet was 16.5 m / min. Thereby, the basis weight of the adhesive layer was 10 g / m ² , and the water-repellent laminated sheet of Comparative Example 2 in which the average diameter of the ultrafine fibers was 30 μm was obtained.

(Comparative Example 3)
An adhesive layer was prepared in the same manner as in Example 1 except that the flow rate of hot air was 0.8 m ³ / min. Thereby, the water-proof laminated sheet of Comparative Example 3 having a basis weight of the adhesive layer of 20 g / m ² and an average diameter of the ultrafine fibers of 60 μm was obtained.

(Comparative Example 4)
A comparative example 4 was a commercially available moisture-permeable waterproof sheet manufactured by Company A. This moisture permeable waterproof sheet is a laminate of an aluminum vapor-deposited polypropylene film, a polypropylene long fiber nonwoven fabric, a polypropylene special nonwoven fabric, and a polypropylene long fiber nonwoven fabric.

(Comparative Example 5)
A commercially available B moisture permeable waterproof sheet manufactured by Company B was used as Comparative Example 5. This moisture-permeable waterproof sheet is a laminate of an aluminum vapor-deposited polypropylene nonwoven fabric, a polypropylene moisture-permeable waterproof film, and a polypropylene nonwoven fabric.

  In addition, the kind of adhesive agent of Comparative Examples 4 and 5, the fabric weight of an adhesive layer, and the average diameter of a fiber are unknown.

(Nail hole water resistance test)
A nail hole water-stop test was performed on the water-stop laminate sheet. FIG. 5 shows a schematic partial cross-sectional view of the nail hole water-stopping test device 70. The spelling needle 40a is No. 3 U based on JIS S 6036. The spelling needle 40a penetrates the water-stopping laminated sheet 10 by a hand tucker and is driven into the wooden piece 75. One spelling needle 40a is driven per nail hole water stop test device 70. The pipe 71 has a cylindrical shape and is formed of a transparent resin. The inner diameter of the pipe 71 is 35 mm. The contact surface between the pipe 71 and the water-stop laminate sheet 10 is bonded by an instantaneous adhesive 73. The periphery of the instantaneous adhesive 73 is covered with a silicone resin sealing agent 74 that is in close contact with the outer peripheral surface of the pipe 71 and the water-stop laminate sheet 10. The instantaneous adhesive 73 and the sealing agent 74 prevent the water 72 that is put into the inner space of the pipe 71 from leaking.

For each of Example 1, Reference Example 1 and Comparative Examples 1 to 5, ten nail hole water stop test devices 70 were prepared. After keeping the temperature of the test chamber at 21 ° C. and a constant humidity of 55%, water 72 was poured into the inner space of the pipe 71 so that the water depth D was 150 mm. This was left still and the water depth D after 24 hours passed was measured. The water depth D after 24 hours was classified into 150 mm, less than 150 mm, 100 mm or more, less than 100 mm, 50 mm or more, and less than 50 mm, and the respective distribution ratios were calculated. Further, an average value of the water depth D after 24 hours was calculated. The results are shown in Table 1.

As is clear from Table 1, the water depth D after 24 hours of the water-stopping laminated sheet of Example 1 to which the present invention is applied has a higher distribution ratio of 100 mm or more than that of the comparative example, and shows a high average value. . The waterproofing laminated sheet of Example 1 had excellent nail hole waterproofing.

  The water-stop laminate sheet of the present invention is used for a base of a house roof or an outer wall.

  10 is a water-proof laminated sheet, 11 is a non-woven base sheet, 12 and 14 are adhesive layers, 12a and 14a are ultrafine fibers, 13 is a moisture-permeable waterproof film, 15 is a non-woven surface sheet, 20 is a base plate, 30 is a vent Matt, 40 is a screw nail, 40a is a spelling needle, 41 is a tip, 42 is a barrel, 43 is a head, 51 is a hot melt adhesive pellet, 52 is an applicator, 53 is a die, 54 is hot air, 55, 57 is a supply roll, 56 is a conveyor, 58 is a laminating roll, 59 is a winding roll, 60 is a wooden house, 61 is a roof, 61a is a pier, 61b is a slate, 62 is an outer wall, 62a is a wall plate, and 62b is a lath , 62c is a mortar, 62d is a coating film, 70 is a nail hole water blocking test device, 72 is water, 73 is an instantaneous adhesive, 74 is a sealing agent, 75 is a piece of wood, D is a depth of water, and P is a nail hole.

Claims (7)

A water-proof laminated sheet having a flexible moisture-permeable waterproof film and fixed to a building material by penetration of a screw nail, and an adhesive layer sandwiching the moisture-permeable waterproof film is mainly composed of polyolefin or polyester state of the hot melt prior to fully curing the hot melt adhesive while viewing contains a web which maintains the fibrous form which is in close contact at stake in the screw nail consists hot melt adhesive comprising the hot melt by melting while in are bonded to the left nonwoven base sheet and the nonwoven topsheet uncured, the nonwoven base sheet via one of the adhesive layer is laminated, the nonwoven facing via the other of said adhesive layer A water-stop laminate sheet, wherein the sheets are laminated.   The water-resistant laminated sheet according to claim 1, wherein the average diameter of the fibers is 30 µm at the maximum. The basis weight of the web, water cut laminated sheet according to claim 1 or 2, characterized in that at least 20 g / m ^2.   The water-stop laminate sheet according to any one of claims 1 to 3, wherein the web is an adhesive melt blown web, flash spun web, electrostatic laminate web, or burst fiber web. The water-resistant laminated sheet according to any one of claims 1 to 4, wherein the adhesive layer contains a water-absorbing resin .   The water-proof laminated sheet according to any one of claims 1 to 5, wherein the building material is a field plate. Melt blown hot melt adhesive to paste non-woven moisture-permeable waterproof film and non-woven surface sheet to non-woven base sheet with polyolefin or polyester as main component before melting and uncured before being completely cured by, after forming an adhesive layer comprising a web which maintains the fibrous form, bonded to the moisture-permeable waterproof film to the adhesive layer, the hot melt adhesive of the same quality of hot melt in the moisture-permeable waterproof film A method for producing a water-repellent laminated sheet, wherein the nonwoven surface sheet is bonded to another adhesive layer including a web that maintains the formed fiber shape by melt-blowing an adhesive.

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