174 results about "Water barrier" patented technology

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

Described herein are fascia rail mounts that are attached to a structure, such as a deck. The disclosed fascia rail mounts include threaded rods that mate with holes in a railing post to allow the railing post to be attached to the structure using the threaded rods, the threaded rods extending from a side plate that is adjacent to a fascia beam of the structure. The disclosed rail mounts are attached to the structure prior to applying any layers designed to protect the structure such that the fascia rail mounts, including the threaded rods, receive the protective layers. A waterproof layer can be applied to the structure after the fascia rail mounts have been affixed so that the threaded rods of the fascia rail mounts extend past the waterproof layer without compromising the waterproofing of the structure. In other words, the waterproof layer forms a waterproof barrier even with the threaded rods extending from the fascia rail mounts through the waterproof layer.

The application discloses a mineral-based easily-recyclable compostable water-barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating is formed by a biodegradable film-forming system and a hierarchical lamellar mineral system containing three different scales and morphologies. The mineral system contains specific morphology and size of lamellar kaolin, non-asbestos grade lamellar talc and fully exfoliated sodium montmorillonite. The mineral lamella forms a dense parallel spread barrier path in the coating through a specific coating and drying solidification process, and combines a pH value responsive reversible cross-linking system to achieve excellent water vapor and oxygen barrier properties, water resistance and oil resistance at a low dry weight of 8-15 g / m2. The coating system does not contain polyvinylidene chloride and perfluoro and polyfluoro alkyl substances. The paper-based material coated with the coating is easily defibered and recycled under standard alkaline warm water conditions, and the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirements.

Power cables are provided having a joint with a metallic water barrier and, in particular, metallic water barrier materials for cable joints for use in high voltage cables for both land and submarine applications.

The utility model relates to a cable, and aims to provide a salt-fog-resistant high-water-blocking bending-resistant seamless aluminum extruded tube coaxial cable, which has the characteristics of salt fog resistance, corrosion resistance, good water-blocking property and small bending-resistant radius. According to the technical scheme, the salt-mist-resistant high-water-resistance bending-resistant seamless aluminum extruded tube coaxial cable comprises an inner conductor, and an insulating inner layer, an insulating foaming layer, a shielding layer and a sheath layer which are sequentially coated outside the inner conductor from inside to outside, the cable is characterized in that the inner conductor is made of high-strength copper-clad aluminum, the insulating inner layer is a salt-mist-resistant low-density polyethylene insulating layer, the insulating foaming layer is a physical foaming polyethylene layer, the shielding layer is a seamless aluminum tube, and the sheath layer is a vinyl chloride layer. An insulating outer surface bonding layer is arranged between the insulating foaming layer and the shielding layer, a waterproof layer is arranged between the shielding layer and the sheath layer, and a waterproof layer is arranged between the shielding layer and the sheath layer.

The application discloses a kind of corrosion-resistant double-armored submarine cable and preparation method thereof, it is related to submarine cable technical field.The corrosion-resistant double-armored submarine cable includes outer sheath layer, water barrier layer, double-armored layer, insulating inner liner, filling layer, insulating layer, copper conductor in turn from surface to inside;The outer sheath layer is obtained by extruding coating on the surface of double-armored layer by corrosion-resistant submarine cable material;The corrosion-resistant submarine cable material includes the following raw material components: by mass parts, 75-90 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-25 parts of modified microfiber, 8-15 parts of ethylene-vinyl acetate copolymer, 0.2-0.5 parts of antioxidant, 1-1.2 parts of lubricant.The application optimizes sheath layer material, solves the problems of existing double-armored submarine cable corrosion failure, short service life, unstable performance and other problems, meets the demand of long-term service reliability.

The utility model discloses a packaging bag with an air leakage detection function, which belongs to the technical field of packaging bags and comprises a packaging bag main body, an air leakage detection component and a sealing opening component, and the packaging bag main body is provided with the air leakage detection component used for detecting whether the packaging bag main body leaks air and the sealing opening component used for exhausting air during sealing; the air leakage detection component comprises a breathable waterproof film, an air bag and a protective sleeve, the breathable waterproof film, the air bag and the protective sleeve are all installed on the top of the right end of the packaging bag body, the air bag is located on the inner side of the protective sleeve, and the two ends of the interior of the air bag communicate with the interior of the packaging bag body through the breathable waterproof film. By means of the mode, through the arrangement of the air bag and the protective sleeve, the air bag is in a wizened state when the interior of the packaging bag body is sealed, the air bag is in a flatulence state when air leaks, whether air leaks in the packaging bag body or not can be checked conveniently, and assistance of other detection equipment is not needed.

The invention relates to the technical field of kitchen appliances, and discloses a waterproof food mixer which comprises a large body, a handle, a base and an upper cover, a fixing assembly is arranged between the handle and a sealing plate, and the fixing assembly is fixed through double mechanical clamping of an inserting block and an inserting groove. The power socket is matched with a composite sealing gasket composed of high-elasticity silicone rubber, ethylene-propylene-diene monomer foaming rubber and a polytetrafluoroethylene coating, so that comprehensive water prevention of electronic elements in the handle is achieved, a protection assembly is arranged outside the large body, and the power socket is provided with a protection structure with a cover plate. The cover plate forms double locking sealing through physical clamping of the sealing block and the sealing column and magnetic attraction of the magnet and the magnetic sheet, moisture invasion during cleaning is effectively prevented, in addition, core components such as the motor and the PCB are arranged below the inner barrel, and the inner barrel and the inner side of the large body are sealed and isolated through the sealing ring. By improving the shell sealing structure and the layout of the circuit board, multiple waterproof barriers are constructed, and the safety and durability of the whole machine are improved.

The invention relates to the technical field of production equipment, and provides a water retaining device of a rough descaling machine and the rough descaling machine. The water retaining device comprises a door opening type water retaining box, a cross beam and a key-shaped steel bar; the cross beam is arranged at the upper end in the water retaining tank, and the extending direction of the cross beam is perpendicular to the extending direction and the vertical direction of a door opening of the water retaining tank. The plurality of key-shaped steel bars are hung on the cross beam through the circular ring structures at the upper parts and can swing around the cross beam; the total width of the plurality of key-shaped steel bars is greater than the total width of the descaling jet; one end of the water retaining box is fixedly connected with an inlet of a box body of a rough descaling machine, the other end of the water retaining box corresponds to an outlet of a heating furnace, and the lower end of the key-shaped steel bar extends out of the water retaining box and is in contact with the upper surface of a slab to form a water retaining barrier. Water splashed outwards when the descaling machine works can be well blocked, equipment such as a roller way and a transmission part at the front end of the rough descaling machine can be effectively protected, the operation stability of a hot continuous rolling production line is improved, and the service life of the equipment is prolonged.

The utility model relates to the technical field of water conservancy projects, in particular to a modularized water stop structure for flood control. The anti-flood structure comprises a plurality of anti-flood modules, a plurality of fixing piles and a plurality of connector assemblies, the connector assemblies are arranged on the anti-flood modules, each anti-flood module comprises a connecting frame, the anti-flood modules are spliced to form a water stop barrier, the fixing piles and the connector assemblies are fixed in an inserted mode, and a pre-stopping water stop plate is connected between the upper connecting frame and the lower connecting frame in a sleeved mode. Pointed ends are arranged at the bottoms of the fixing piles, and the fixing piles are inserted into a riverbed or dam fixing structure body. All the components of the modularized water stop barrier system are prefabricated parts, and can be directly transported to a construction site to be assembled after being produced in a factory. The installation process is simple and convenient, the construction time is shortened, and the requirements of flood control and emergency rescue can be quickly responded. The module is high in adaptability, and the combination mode and the installation position of the module can be flexibly adjusted according to different terrains and breach sizes.

1. Name of the product in this design: Water tank baffle. 2. Purpose of this design: A baffle plate for a sink. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A heat transfer device includes a hollow spacer between opposed substrates, defining an enclosure, at least one of the substrates adapted to be secured to at least one heat source. A non-permeable barrier is in the enclosure between the substrates. A first chamber inside the enclosure is defined by the spacer, the substrates, and the barrier, the first chamber in fluid communication with at least one first inlet and first outlet. A second chamber inside the enclosure and outside the first chamber and is defined by the spacer, the substrates, and the barrier, the second chamber in fluid communication with at least one second outlet. A wick structure is secured to at least one substrate, a first portion of the wick structure in the first chamber, and a second portion of the wick structure in the second chamber and interconnecting in passive liquid communication with the first portion.

The present application relates to the technical field of thin films, and particularly relates to an anti-puncture nylon film, a preparation method and application thereof.The anti-puncture nylon film comprises, by weight fraction, 75-92 parts of nylon, 1-5 parts of a slip agent, 0.5-1.5 parts of an anti-adhesion agent, 2-5 parts of modified MXene nanosheets and 4-10 parts of a toughening agent.The anti-puncture nylon film of the present application "softens" the nylon matrix through the toughening agent and forms a hydrogen bond network with the nylon matrix, and a "rigidity-hydrophobic" barrier is constructed by introducing fluorinated modified MXene, and the two achieve "high strength-high barrier" integration in cooperation; in addition, the toughening agent also endows the nylon film with excellent flame retardant performance, so that the nylon film has a wide application prospect in the field of packaging materials.

The invention relates to a side wall decoration strip assembly and a vehicle window glass assembly. The side wall decoration strip assembly comprises a decoration strip body, a water retaining strip, a first fixing structure and a second fixing structure, and the water retaining strip is used for being connected between the decoration strip body and a vehicle body metal plate in an abutting and sealing mode. The first fixing structure is connected between the lower end of the water retaining strip and the upper end of the decoration strip body, and the second fixing structure is connected between the water retaining strip and the decoration strip body and used for limiting displacement of the water retaining strip in the length direction of the water retaining strip. The second fixing structure is arranged on the first fixing structure or arranged on the side, closer to the outside of the automobile than the first fixing structure, of the decoration strip body. According to the side wall decoration strip assembly, the water retaining strip can keep consistent outward deformation after being loaded, and therefore the appearance performance is improved.

The invention provides a moisture-proof film-coated floor and a film coating device, and relates to the technical field of bathroom floor production. The damp-proof film laminating device for the laminated floor comprises a first film laminating box, a first curing box, a second film laminating box and a second curing box which are sequentially arranged in the plate conveying direction. The moisture-proof film-coated floor comprises a floor body, and the floor body is composed of a base material and a coating film coated on the outer wall of the base material. The first laminating box, the first curing box, the second laminating box and the second curing box are sequentially arranged in the conveying direction and work in a linkage mode, and a traditional one-stop laminating process is creatively decomposed into a relay type step-by-step treatment process aiming at different surface areas of floors. According to the moisture-proof film-coated floor, the whole upper surface, all side surfaces and the lower surface of the base material are coated with the continuous and complete nanometer hydrophobic coating, and a seamless three-dimensional waterproof barrier is formed.

The utility model relates to the technical field of decorative wallboard, specifically disclose a kind of decorative wallboard with moisture-proof function, including substrate, the substrate is sequentially composite from inside to outside, vapour barrier: the continuous dense film formed by single-component polyurethane waterproof coating coated on the surface of substrate, thickness is set between 0.3-1mm, moisture-proof layer: by spraying on vapour barrier nanometer silicon dioxide waterproof coating is made of, thickness is set between 0.05-0.2mm, water absorption layer: set on moisture-proof layer, by filling with high water-absorbing resin and alginate fibre honeycomb composite water-absorbing material is made of, thickness is set between 5-8mm, the decorative wallboard, with multiple moisture-proof effect, vapour barrier blocks water vapor penetration, moisture-proof layer forms superhydrophobic barrier, water absorption layer actively absorbs and adjusts humidity, ventilation layer promotes air circulation and accelerates water vapor evaporation, each layer synergistic effect realizes efficient moisture-proof, significantly reduce decorative wallboard damp deformation and mildew risk, improve service life, strong practicality.

The utility model discloses a soaking tank water blocking device which comprises a box body, a water blocking assembly is arranged on the box body, the water blocking assembly comprises a drainage pipe, a water distribution box, water distribution pipes, an abutting plate and an abutting rod, the drainage pipe is connected to the bottom of the box body, the water distribution box is installed at the bottom of the drainage pipe, and the water distribution pipes are connected to the two ends of the water distribution box. The abutting plate is fixedly installed on the water distribution pipe, the abutting rod is connected to the abutting plate in a sliding mode, a protection assembly is arranged on the box body and comprises an installation frame, a protection plate and a shielding plate, the installation frame is fixedly installed on the box body, the protection plate is arranged on the installation frame, the shielding plate is rotationally connected to one end of the protection plate, and the protection plate is arranged on the shielding plate. The technical problem that an external water source is prone to permeating into a water inlet groove in the soaking process due to the fact that a current device mentioned in the background technology lacks enough sealing measures is solved.

The utility model relates to the field of adapters, and discloses an adapter with sealing and waterproof effects, which comprises a shell, the periphery of the shell is fixedly connected with mounting feet, the front side and the rear side of the shell are respectively provided with a heat dissipation channel, the surface of the top end of the shell is fixedly connected with a buckle, the surface of the buckle is connected with an upper cover plate in a clamping manner, and the upper cover plate is fixedly connected with the shell. Threading holes are formed in the front end and the rear end of the shell, sealing and clamping mechanisms are arranged at the front end and the rear end of the shell, each sealing and clamping mechanism comprises a rubber ring, the surface of each rubber ring is in contact with a threaded seat, and the surface of each threaded seat is fixedly connected with a connecting seat. According to the utility model, the upper cover plate adopts a double fixing mode of the buckle and the bolt, so that a tight top waterproof barrier is formed; the sealing and clamping mechanism at the threading hole wraps the wire harness through elastic deformation of the nitrile rubber ring and cooperates with the threaded seat for extrusion and sealing, so that water is prevented from invading from gaps of the wire harness.

The utility model relates to the technical field of intelligent closestool, especially to a kind of intelligent heating closestool, including closestool seat and closestool ring, closestool ring is movably arranged on closestool seat, electric heating wire is arranged in closestool ring, temperature is transmitted to the upper surface of closestool ring by heat transfer of electric heating wire, air hole, which is communicated with the inside of closestool ring, is opened in the side wall of closestool ring, waterproof air-permeable membrane of high temperature resistance is equipped on closestool ring, waterproof air-permeable membrane covers on air hole;The position of air hole on the side wall of closestool ring is also provided with waterproof flow guide structure, waterproof flow guide structure is communicated with outside and air hole, for guiding water flow away from air hole.The utility model discloses a kind of intelligent heating closestool, waterproof air-permeable membrane is set on the air hole of closestool ring, to form a water barrier, while guiding water flow away from air hole by waterproof flow guide structure, effectively prevent water droplet or water vapor from entering closestool ring by air hole, avoid affecting the performance and service life of electric heating wire.

A mattress allowing for convenient detachment, washing and replacement, comprising a mattress main body and an outer cover (1) covering the outer side of the mattress main body, wherein the outer cover (1) comprises a main fabric portion (11) wrapping the outer side of the mattress main body, and a waterproof fabric layer (12); the waterproof fabric layer (12) is detachably connected to the main fabric portion (11); a contact fabric layer (2) is further provided above the waterproof fabric layer (12); the contact fabric layer (2) is detachably connected to the waterproof fabric layer (12). The contact fabric layer (2) first functions as a barrier, thereby effectively blocking solid dirt; and the waterproof fabric layer (12) below the contact fabric layer (2) functions as a good water barrier, thereby effectively preventing the mattress main body from being in contact with water, and reducing pollution. The contact fabric layer (2) and the waterproof fabric layer (12) are both of a detachable structure, both can be separately washed, and are also conveniently replaced, thereby achieving the treatment of dirt on the mattress within a short time period, and further satisfying the use requirements of mothers and infants.

The present application belongs to the technical field of thermal protection coating of aero-engine and gas turbine, and relates to an environmental barrier coating for resisting high-temperature water-oxygen corrosion of SiC-based ceramic or composite material and a preparation method thereof. With SiC or SiC-based composite material as a substrate, MoSi2 powder is first sprayed on the surface of the substrate by atmospheric plasma spraying, so that the Si element in MoSi2 is selectively volatilized to form a composite coating mainly composed of MoSi2 and Mo5Si3; then HfO2 powder is sprayed on the surface of the composite coating by atmospheric plasma spraying to form an HfO2 layer; and then the substrate after spraying the HfO2 layer is placed in an oxygen-containing gas atmosphere, heated to 1200-1500 DEG C for high-temperature oxygen-containing heat treatment to obtain a coating structure with three-layer structure of sacrificial layer, oxygen barrier layer and water barrier layer. The environmental barrier coating prepared by the present application has higher stability in high-temperature water-oxygen environment and higher comprehensive performance.

The application discloses a microphone structure and electronic equipment, and relates to the micro-electromechanical packaging technical field, wherein the microphone structure comprises a circuit board, a shell and a mounting substrate, the shell is arranged on the circuit board, and forms a mounting cavity together with the circuit board, one end of the shell away from the circuit board is provided with a sound inlet hole, the mounting substrate is arranged on the inner wall of the shell, one side of the mounting substrate facing the circuit board is provided with a chip module, the mounting substrate is provided with a sound passing hole, the sound passing hole is communicated with at least part of the structure of the chip module, and the chip module is electrically connected with the circuit board, wherein a waterproof film is arranged between the mounting substrate and the shell, and the waterproof film at least partially covers the sound inlet hole. According to the application, the waterproof film is arranged between the mounting substrate and the sound inlet hole of the shell, so that a water-blocking barrier is formed between the internal sealed space and the outside, and water and dust are prevented from entering the sealed space.

The utility model relates to the technical field of bus station bus shelter, and discloses a bus station bus shelter with a protection function, which comprises a first protection support, a second protection support, a fixing groove, a driving motor and a screw rod, the second protection support is arranged on the left side of the first protection support, the fixing groove is fixedly arranged in the first protection support, and the driving motor is arranged in the fixing groove. And a driving motor is fixedly arranged at the inner end of the fixing groove. According to the bus station shelter with the protection function, by improving the bus station shelter with the protection function, a user can use a driving motor to drive a lead screw to rotate, so that a first connecting seat and a second connecting seat can advance or retreat, and the bus station shelter with the protection function is more convenient to use. And by increasing the length of the movable water retaining shed, rainwater blown from the front side of the bus shelter is reduced, the waterproof effect of the bus shelter of the bus station is improved, and the practicability of the equipment is improved.

The utility model provides a cystosepiment with good moisture-proof performance, which belongs to the technical field of cystosepiments and comprises a cystosepiment body, a moisture-proof layer is arranged on the surface of the cystosepiment body, a drainage structure is arranged in the moisture-proof layer, and the drainage structure comprises a water guide component and a drainage collection component. The water guiding assembly comprises a plurality of water guiding channels, the drainage collecting assembly comprises a collecting groove and a drainage pipe, the tail ends of the water guiding channels communicate with the collecting groove, the drainage pipe is longitudinally arranged along the edge of the foam board and is in through connection with the collecting groove, and a protection assembly is arranged on the peripheral side of the foam board body. According to the device, through the arrangement of a double-layer structure of the damp-proof layer, the outer water absorption layer can absorb external moisture, and the inner HDPE film water-resisting layer prevents the moisture from further permeating into the foam board body.

The application belongs to the technical field of high polymer materials, and relates to a barrier pipe shoulder modification material, a barrier pipe shoulder and a preparation method thereof.The barrier pipe shoulder modification material comprises a polyethylene matrix, organic modified montmorillonite, high-density polyethylene and a compatibilizer in specific proportions, and the polyethylene matrix is low-density polyethylene and / or linear low-density polyethylene;the polyethylene matrix is subjected to double barrier modification by selecting organic modified montmorillonite and high-density polyethylene for matching, and the compatibilizer is used as an auxiliary, so that the finally obtained pipe shoulder modification material has excellent barrier performance;after the pipe shoulder injection molding raw material is mixed to form a pipe shoulder, the obtained pipe shoulder has excellent oxygen barrier performance, water barrier performance and mechanical performance.

The utility model provides a lighting cable with water blocking device, including first silica gel line, second silica gel line, adapter plate, water blocking structure and outer pipe cover, second silica gel line is connected to lighting device, first silica gel line includes a plurality of first insulated core and first sheath, second silica gel line includes a plurality of second insulated core and second sheath, first insulated core connects one end of adapter plate, second insulated core connects the other end of adapter plate, and water blocking structure is wrapped adapter plate, first insulated core, second insulated core through mould pressing forming, and water blocking structure carries out the interruption to the water of the gap of a plurality of first insulated core and first sheath, and the outer pipe cover is sleeved on water blocking structure, the utility model discloses water blocking structure through hydraulic integrated molding and seals the adapter plate, first silica gel line and second silica gel line junction, and the water of the gap of first insulated core and first sheath in first silica gel line is interrupted, and the outer pipe cover is sleeved on water blocking structure, and water blocking structure is reinforced.

The utility model relates to the field of building structures, in particular to a light roof structure of a large-span space building, which comprises a building body, a roof device and a heat preservation device, and is characterized in that the roof device is fixedly connected with the top of the building body, and the surface of the heat preservation device is fixedly connected with the roof device. The roof device comprises a supporting frame fixedly connected to the top of the building body, the supporting frame is in an inverted V shape, a roof panel is fixedly connected to the surface of the supporting frame, clamping grooves are formed in the two side faces of the roof panel, clamping blocks are connected to the inner walls of the clamping grooves in a clamped mode, and sealing sleeves are fixedly connected to the surfaces of the clamping blocks. By arranging the roof device, roof pressure can be more efficiently dispersed, the overall stability of the roof in a large-span space is greatly enhanced, complex environment pressure can be better dealt with, the dead weight of the roof is effectively reduced, convenient installation is achieved, meanwhile, good waterproof and dustproof performance is ensured, and multiple waterproof barriers are constructed.

The invention relates to a rigid composite waterproof structure suitable for a high-salt environment and a construction technology thereof, and relates to the technical field of building waterproof design, the waterproof structure comprises a bottom plate, the bottom plate is provided with a plurality of side walls, the side walls are vertically arranged, and an indoor space is formed between the bottom plate and the side walls; water gathering cavities are formed in the side walls, and the multiple water gathering cavities are sequentially arranged at intervals in the length direction of the side walls; an outer wall waterproof layer is arranged on the outer side wall of the side wall, an inner wall waterproof layer is arranged on the inner side wall of the side wall, and a buffering waterproof layer is arranged on the inner wall of the water gathering cavity. The outer wall waterproof layer, the buffering waterproof layer and the inner wall waterproof layer are matched to form three layers of waterproof barriers which are sequentially stacked, the waterproof performance of the waterproof structure can be effectively improved, the service life of the waterproof structure can be effectively prolonged, and therefore the applicability of the waterproof structure in the high-salt environment can be improved.

This application discloses a segment sealing strip, relating to the field of tunnel engineering technology. The strip includes a main body and, through a multi-structure collaborative design, achieves a comprehensive improvement in waterproof performance and engineering applicability. The wavy EPDM rubber layer, with its undulating curved surface structure, constructs multiple three-dimensional water-blocking barriers, significantly enhancing waterproofing efficiency. The water-swellable rubber layer expands rapidly upon contact with water, filling tiny gaps and forming dynamic waterproof reinforcement. The internal pore design gives the strip excellent elastic deformation capability, adaptively adjusting its shape during segment compression and displacement to ensure the continuity and stability of the seal. The metal support skeleton enhances the overall rigidity of the strip, effectively resisting external impacts and deformation, maintaining the integrity of the sealing structure. The bottom protrusion, combined with anti-slip texture, achieves precise fitting and firm fixation with the segment groove, preventing misalignment during installation and curing, and ensuring long-term stable operation of the sealing system.

To provide a quality control method for a bentonite-containing impervious layer ensures quality control by measuring the penetration resistance force of the bentonite-containing impervious layer, even at a slope face or a narrow part.SOLUTION: A quality control method for a bentonite-containing impervious layer comprises: an abutting step 6 for bringing a penetration resistance force detection device, which has a penetration part penetrated into an impervious layer containing bentonite ballast or bentonite mixed soil and a resistance force detection part for detecting the penetration resistance force which the penetration part receives from the impervious layer and is usable in a gripped state in the hand, into contact with the target impervious layer so as to allow the penetration part to penetrate roughly orthogonally into the impervious layer; a resistance force detection step 7 which makes the penetration part enter into the impervious layer and detects the penetration resistance force received by the penetration part through the resistance force detection part; a water permeability coefficient conversion step 9 in which a conversion device receives the penetration resistance force detected in the resistance force detection step 7 and in which the conversion device calculates a water permeability coefficient from the penetration resistance force; and a determination step 11 in which a determining device determines that the water permeability coefficient calculated in the water permeability coefficient conversion step 9 is equal to or less than a threshold value.SELECTED DRAWING: Figure 1