CN111425228A - Non-asphalt self-adhesive EVA composite waterproof board and processing technology thereof - Google Patents
Non-asphalt self-adhesive EVA composite waterproof board and processing technology thereof Download PDFInfo
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- CN111425228A CN111425228A CN202010388597.7A CN202010388597A CN111425228A CN 111425228 A CN111425228 A CN 111425228A CN 202010388597 A CN202010388597 A CN 202010388597A CN 111425228 A CN111425228 A CN 111425228A
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- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 239000000853 adhesive Substances 0.000 title claims abstract description 24
- 239000010426 asphalt Substances 0.000 title claims description 18
- 238000005516 engineering process Methods 0.000 title claims description 12
- 239000004831 Hot glue Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003292 glue Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 32
- 238000001125 extrusion Methods 0.000 claims description 28
- 239000004746 geotextile Substances 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 239000002518 antifoaming agent Substances 0.000 claims description 12
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 12
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000012790 adhesive layer Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000004078 waterproofing Methods 0.000 abstract description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 86
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 86
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 84
- 239000004033 plastic Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Polymers & Plastics (AREA)
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- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Medicinal Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses compound waterproof board of non-pitch self-adhesive formula EVA in the waterproofing membrane technical field comprises EVA waterproof substrate, non-woven geotechnique's cloth, polymer hot melt adhesive and barrier film, and non-woven geotechnique's cloth and polymer hot melt adhesive set up the two sides at EVA waterproof substrate respectively, the upper portion of polymer hot melt adhesive covers there is the barrier film. This application sets up nonwoven geotechnological cloth (composite bed) and polymer hot melt adhesive (self-adhesive layer) respectively on the two sides of EVA waterproof substrate through the improvement to the process to this obtains that water-proof effects is better, and it is more convenient to install, and the better tunnel of intensity is with non-pitch self-adhesive formula EVA composite waterproof board.
Description
Technical Field
The invention belongs to the technical field of waterproof coiled materials, and particularly relates to a non-asphalt self-adhesive EVA composite waterproof board and a production process thereof.
Background
The waterproof board is an impermeable material prepared by using a high molecular polymer as a basic raw material, has the main functions of preventing liquid leakage and gas volatilization, has the main functions of preventing seepage and isolation in rock engineering, has the functions of reinforcement and protection, and is widely applied to building, traffic and engineering construction. Along with the expansion of the radiation range of high-speed rails in China, the natural environment involved in the construction of the high-speed rails is more and more severe, is not concentrated on coastal areas with flat terrain, and gradually extends to inland at present. In the high-speed railway design, there is often the environment in many hills and mountains in inland area, to this environment, often need design and build the tunnel in the design, in tunnel infrastructure, the waterproof board is then the key barrier material in the tunnel construction, simultaneously when laying the waterproof board on the tunnel surface, in order to make things convenient for the assembly between the waterproof board, paste the waterproof board on the tunnel surface in advance usually, general EVA waterproof board is or the composite bed that EVA waterproof substrate adds non-woven geotechnological cloth and forms, or the self-adhesive layer that EVA waterproof substrate adds the formation of molecule hot melt adhesive, do not process composite bed and self-adhesive layer simultaneously on EVA waterproof substrate at present.
Disclosure of Invention
This application provides a compound waterproof board of non-pitch self-adhesive formula EVA for solving prior art not enough, this application.
The application discloses compound waterproof board of non-pitch self-adhesive formula EVA comprises waterproof substrate of EVA, non-woven geotechnique's cloth, polymer hot melt adhesive and barrier film, and non-woven geotechnique's cloth and polymer hot melt adhesive set up the two sides at the waterproof substrate of EVA respectively, the upper portion of polymer hot melt adhesive covers there is the barrier film.
Furthermore, the EVA waterproof substrate is prepared by melting, plasticizing, extruding, three-roll calendering and molding linear low-density polyethylene resin, EVA and a defoaming agent.
More specifically, the weight ratio of the linear low-density polyethylene resin, the EVA and the defoaming agent is 1000-1100: 100-110: 1.25 to 1.3.
More preferably, the weight ratio of the linear low density polyethylene resin, the EVA and the defoamer is 1000: 100: 1.25, 1100: 110: 1.3 or 1050: 100: 1.25.
preferably, the isolation film is a transparent plastic film.
Wherein the macromolecular hot melt adhesive is ES3086 hot melt adhesive produced by Guangdong Nenghui new material science and technology limited company.
EVA is ethylene-vinyl acetate copolymer.
The defoaming agent is an EVA emulsion defoaming agent, is a defoaming agent prepared by refining modified polyether silicon through a special process, has good thermal stability and chemical stability, can generate stable unbalanced surface tension in foam, controls the foam in the whole production process, eliminates various large and small bubbles and improves the product quality.
The working principle and the beneficial effects of the invention are as follows: this application sets up composite bed (non-woven geotechnological cloth) and self-adhesive layer (polymer hot melt adhesive) respectively on the two sides of EVA waterproof substrate through the improvement to the process to this obtains that water-proof effects is better, and it is more convenient to install, and the better non-pitch self-adhesive formula EVA composite waterproof board is used in tunnel of intensity.
In the invention, no special auxiliary agent and anti-aging agent are added, and only the linear low-density polyethylene resin, the EVA and the defoaming agent are added, wherein the amount of the EVA is very small compared with the linear low-density polyethylene resin and is only one tenth of that of the linear low-density polyethylene resin.
The processing technology of the non-asphalt self-adhesive EVA composite waterproof board comprises the following steps: 1) preparing materials: preparing non-woven geotextile, and preparing an EVA waterproof base material, a high-molecular hot-melt adhesive and an isolating membrane, wherein the EVA waterproof base material is obtained by the raw materials of the EVA waterproof base material through a stirring mixer, a screw extruder and a three-roll calender;
2) hot pressing: placing the non-woven geotextile on a non-woven geotextile attaching machine platform, carrying out hot pressing on one surface of the EVA waterproof substrate to obtain a composite board, and cooling the composite board to 60-75 ℃;
3) gluing: after being melted by a sol machine, the high-molecular hot melt adhesive is uniformly coated on the smooth surface of the other surface of the composite board by glue coating equipment;
4) film covering: and (3) pasting the isolating membrane on the surface coated with the high-molecular hot melt adhesive to obtain the non-asphalt self-adhesive EVA composite waterproof board.
In the prior art, if a composite layer and a self-adhesive layer are required to be combined on an EVA (ethylene vinyl acetate) waterproof substrate, secondary processing is required, namely, the composite layer is firstly processed or the self-adhesive layer is firstly processed, but the composite layer is required to be hot-pressed on the EVA waterproof substrate in the processing mode, so that the place where the non-woven geotextile and the EVA are combined is easy to crack and fall off, even the non-woven geotextile can be embedded into the EVA waterproof substrate, the thinned place is even provided with holes, the yield is low, and the waterproof effect can be influenced.
The non-asphalt self-adhesive EVA composite waterproof board provided by the application only needs to add linear low-density polyethylene, EVA and a defoaming agent into a stirrer to be uniformly mixed to prepare a board premix, then the board premix is extruded by a melting and blending screw and is formed into a board by cooling and rolling, the preparation of the EVA waterproof base material by one-step melting and blending screw extrusion and cooling and rolling forming can be realized, the temperature of the EVA waterproof base material is above 120 ℃, then non-woven geotextile is hot-pressed on the EVA waterproof base material, a discharging and cooling device is arranged at the outlet of a hot press, the traction distance of the composite board is increased at the same time, the composite board is cooled to 60-75 ℃, then polymer hot melt adhesive is uniformly coated on the smooth surface of the other surface of the composite board by a glue coating device, then the isolating film is coated with polymer and is rolled to obtain the non-asphalt self-adhesive EVA composite waterproof board, and the yield is improved.
Furthermore, the above processing technology needs to use a glue coating device, the glue coating device comprises a frame, a glue inlet tube and a glue film head, the frame is provided with a traction roller for transmitting EVA waterproof base material, the side edge of the traction roller is obliquely provided with the glue film head perpendicular to the EVA waterproof base material, the top of the glue film head is communicated with the glue inlet tube, the glue film head comprises a shell, a driving glue roller and a driven glue roller, the shell is sequentially provided with a glue inlet, a driven glue roller clamping part and a driving glue roller clamping part from top to bottom, the glue inlet tube is communicated with the glue inlet, the driven glue roller is provided with a plurality of rows of teeth distributed along the axial direction, the shell is provided with tooth grooves which are engaged with the teeth and extend towards the driving glue roller, the driving glue roller is provided with an extrusion groove at a position opposite to the teeth, the extrusion groove is internally provided with a spring top cap, the spring top cap comprises a cover, a key shaft and a spring, the cover is located on top of the key shaft. The driven rubber roll is provided with a plurality of rows of teeth which are arranged along the axial direction, the shell is provided with tooth sockets which are meshed with the teeth, so that the driven rubber roll can not be blocked by the shell when rotating, the driving rubber roll is provided with an extrusion groove, a spring top cap is arranged in the extrusion groove, the spring top cap is similar to the keyboard key, the teeth extrude a plastic cover, the plastic cover extrudes a spring positioned in a key groove, the plastic cover moves towards the extrusion groove, high-molecular hot melt adhesive enters the shell through a glue inlet and enters the extrusion groove on the driving rubber roll from the driven rubber roll, when coating, the EVA waterproof base material is dragged and transmitted by a traction roll, and the EVA waterproof base material is contacted with a glue film head, so the driving rubber roll rolls on the EVA waterproof base material, the driven rubber roll rolls along with the driving rubber roll, and the teeth are arranged on the driven rubber roll, so that the high-molecular hot melt adhesive flowing out from the upper part through the rubber roll can only depend, the water flows to the active rubber roll from the tooth socket, and is coated on the surface of the EVA waterproof base material through the active rubber roll; the tooth is fashionable with the extrusion groove tooth on the initiative rubber roll, the spring top cap is extruded in the extrusion groove by the tooth, when tooth and extrusion groove are separately the spring top cap is ejecting extrusion groove to the polymer hot melt adhesive in the extrusion groove under elastic effect, enable the initiative rubber roll like this and produce the polymer hot melt adhesive and can fill up EVA waterproof substrate surface and gap when the transmission, guaranteed the homogeneity that polymer hot melt adhesive paintd on EVA waterproof substrate, and guarantee that the thickness is unanimous, avoid extravagant.
Furthermore, the included angle between the glue film head and the horizontal direction is 45 degrees.
Furthermore, be provided with the extrusion spring that extrudees the shell towards the waterproof substrate of EVA in the frame. The EVA waterproof substrate with different thicknesses can be matched.
Furthermore, a stop piece for limiting the rotation of the driving rubber roller is arranged on the driving rubber roller clamping part. When the active rubber roll does not need to be smeared, in order to avoid the situation that the active rubber roll rotates to enable the high-molecular hot melt adhesive to flow out, the stop piece is added to limit the rotation of the active rubber roll at the moment.
Drawings
FIG. 1 is a schematic structural view of a glue spreading apparatus according to the present invention;
fig. 2 is a cross-sectional view of the film dispensing head of fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the rubber coating machine comprises a rubber inlet pipe 1, an extrusion spring 2, a rubber coating head 3, an EVA (ethylene vinyl acetate) waterproof base material 4, a traction roller 5, a frame 6, a shell 301, a rubber inlet 302, a driven rubber roller clamping part 303, a driven rubber roller 304, a spring top cap 305, a driving rubber roller clamping part 306 and a driving rubber roller 307.
Embodiment 1, a process for preparing a non-asphalt self-adhesive EVA composite waterproof sheet, comprising the following steps: 1) preparing materials: preparing non-woven geotextile, and preparing an EVA waterproof substrate 4, a high-molecular hot-melt adhesive and an isolating membrane, wherein the EVA waterproof substrate 4 is prepared by mixing linear low-density polyethylene resin, EVA and an EVA emulsion defoaming agent according to the weight ratio of 1000: 100: 1.25, melting, plasticizing, extruding, three-roller calendering and forming.
2) Hot pressing: placing the non-woven geotextile on a non-woven geotextile attaching machine platform, hot-pressing one surface of the EVA waterproof substrate 4 to obtain a composite board, and cooling the composite board to 60-75 ℃ by arranging a cooling device at a discharge port and increasing the traction distance;
3) gluing: the coating equipment is needed to be used during coating, the coating equipment comprises a frame 6, a rubber inlet pipe 1 and a rubber film head 3, a traction roller 5 for transmitting an EVA (ethylene vinyl acetate) waterproof substrate 4 is arranged on the frame 6, a rubber film head 3 perpendicular to the EVA waterproof substrate 4 is obliquely arranged on the side edge of the traction roller 5, the top of the rubber film head 3 is communicated with the rubber inlet pipe 1, the rubber film head 3 comprises a shell 301, a driving rubber roller 307 and a driven rubber roller 304 which are positioned in the shell 301, the shell 301 is sequentially provided with a rubber inlet 302, a driven rubber roller clamping part 303 and a driving rubber roller clamping part 306 from top to bottom, the rubber inlet pipe 1 is communicated with the rubber inlet 302, the driven rubber roller 304 is provided with a plurality of rows of teeth distributed along the axial direction, a tooth groove which is meshed with the teeth and extends towards the driving rubber roller 307 is arranged on the shell 301, an extrusion groove is arranged at a position opposite to the teeth on the driving rubber roller 307, Key axle and spring, spring are located the key axle, and the lid is located the tangent plane of top glued membrane head 3 and the waterproof substrate 4 of EVA of key axle perpendicularly, and glued membrane head 3 and the contained angle of horizontal direction is 45. Because the extrusion spring 2 is arranged between the frame 6 and the shell 301 of the glue film head 3, and the extrusion spring 2 is in an extruded state under normal conditions, after being melted by the glue dissolving machine, the high molecular hot melt adhesive is uniformly coated on the other side of the EVA waterproof substrate 4 by the glue coating equipment, specifically, the high molecular hot melt adhesive melted in the glue inlet pipe 1 enters the shell 301 through the glue inlet 302, because the driven glue roller 304 is provided with a plurality of rows of teeth arranged along the axial direction, the shell 301 is provided with tooth grooves engaged with the teeth, so that the driven glue roller 304 can not be blocked by the shell 301 when rotating, the driving glue roller 307 is provided with an extrusion groove, the extrusion groove is internally provided with a spring top cap 305, the spring top cap 305 is similar to a keyboard key form, the teeth extrude a plastic cover, the plastic cover extrudes a spring positioned in the key groove, so that the plastic cover moves towards the extrusion groove, and the high molecular flows onto the driven glue roller 304 from the upper part of, the EVA waterproof base material 4 is dragged and transmitted by the traction roller 5 and the EVA waterproof base material 4 is contacted with the adhesive film head 3 during coating, so that the driving rubber roller 307 can roll on the EVA waterproof base material 4, the driven rubber roller 304 also rolls along with the EVA waterproof base material 4, and the teeth are arranged on the driven rubber roller 304, so that the macromolecular hot melt adhesive flowing out of the upper part through the rubber inlet pipe 1 can only rotate by the teeth, flows to the driving rubber roller 307 from the tooth groove and is coated on the surface of the EVA waterproof base material 4 through the driving rubber roller 307; when the teeth are meshed with the extrusion groove on the active rubber roll 307, the spring top cap 305 is extruded in the extrusion groove by the teeth, when the teeth are separated from the extrusion groove, the spring top cap 305 ejects the high-molecular hot melt adhesive in the extrusion groove out of the extrusion groove under the action of elasticity, so that the high-molecular hot melt adhesive generated by the active rubber roll 307 during transmission can fill the surface and the gap of the EVA waterproof substrate 4, the coating uniformity of the high-molecular hot melt adhesive on the EVA waterproof substrate 4 is ensured, the thickness is ensured to be consistent, and the waste is avoided.
4) Film covering: and (3) pasting the isolating membrane on the surface coated with the high-molecular hot melt adhesive to obtain the non-asphalt self-adhesive EVA composite waterproof board.
Wherein the macromolecular hot melt adhesive is ES3086 hot melt adhesive produced by Guangdong Nenghui new material science and technology limited company.
EVA is ethylene-vinyl acetate copolymer.
The defoaming agent is an EVA emulsion defoaming agent.
The thickness of the EVA waterproof board for the railway tunnel is 3-5 mm.
The thickness of the EVA waterproof substrate 4 is 1-1.5 mm, the thickness of the non-woven geotextile is 1.8-2.7 mm, and the coating thickness of the high-molecular hot melt adhesive is 0.2-0.4 mm.
Example 2 differs from example 1 only in that the weight ratio of the linear low density polyethylene resin, EVA and defoamer is 1100: 110: 1.3.
example 3 differs from example 1 only in that the weight ratio of the linear low density polyethylene resin, EVA and defoamer is 1050: 100: 1.25.
Example 5 differs from example 1 only in that the EVA waterproofing substrate 4 is sprayed with glue using a glue spraying apparatus.
Comparative example 1, the EVA waterproof substrate 4 was processed, the nonwoven geotextile was hot-pressed onto the EVA waterproof substrate 4 to form a composite board, then the high-molecular hot-melt adhesive was coated on the other side of the composite board immediately, and then the barrier film was coated. Compared with the embodiment 1, the temperature is too high, the place where the non-woven geotextile and the EVA waterproof substrate 4 are combined is dry cracked and falls off, the non-woven geotextile can be embedded into the EVA waterproof substrate 4, and the yield is reduced by 20%.
Comparative example 2, the EVA waterproof substrate 4 was processed, the nonwoven geotextile was hot-pressed onto the EVA waterproof substrate 4 to form a composite board, after a period of time, secondary processing was performed, the high molecular hot melt adhesive was coated on the other side of the composite board, and then the barrier film was coated. The energy consumption was increased by 10% compared to example 1.
Comparative example 3, the EVA waterproof substrate 4 was processed, the high-molecular hot-melt adhesive was coated on one side of the EVA waterproof substrate 4, the barrier film was coated, and then the nonwoven geotextile was hot-pressed onto the EVA waterproof substrate 4. In the hot pressing process, the high-molecular hot melt adhesive is easily extruded, and the processing difficulty is increased.
Claims (9)
1. Non-pitch self-adhesive EVA composite waterproof board, its characterized in that: constitute by EVA waterproof substrate, non-woven geotechnique's cloth, polymer hot melt adhesive and barrier film, non-woven geotechnique's cloth and polymer hot melt adhesive set up respectively on the two sides of EVA waterproof substrate, the upper portion of polymer hot melt adhesive covers there is the barrier film.
2. The non-asphalt self-adhesive EVA composite waterproof sheet according to claim 1, wherein: the EVA waterproof substrate is prepared by melting, plasticizing, extruding, three-roller calendering and molding linear low-density polyethylene resin, EVA and a defoaming agent.
3. The non-asphalt self-adhesive EVA composite waterproof sheet according to claim 2, wherein: the weight ratio of the linear low-density polyethylene resin to the EVA to the defoaming agent is 1000-1100: 100-110: 1.25 to 1.3.
4. The non-asphalt self-adhesive EVA composite waterproof sheet according to claim 1, wherein: the isolating film is a transparent plastic film.
5. The processing technology of the non-asphalt self-adhesive EVA composite waterproof board according to any one of claims 1 to 4, characterized in that: the method comprises the following steps: 1) preparing materials: preparing non-woven geotextile, and preparing an EVA waterproof base material, a high-molecular hot-melt adhesive and an isolating membrane, wherein the EVA waterproof base material is obtained by the raw materials of the EVA waterproof base material through a stirring mixer, a screw extruder and a three-roll calender;
2) hot pressing: placing the non-woven geotextile on a non-woven geotextile attaching machine platform, carrying out hot pressing on one surface of the EVA waterproof substrate to obtain a composite board, and cooling the composite board to 60-75 ℃;
3) gluing: after being melted by a sol machine, the high-molecular hot melt adhesive is uniformly coated on the smooth surface of the other surface of the composite board by glue coating equipment;
4) film covering: and (3) pasting the isolating membrane on the surface coated with the high-molecular hot melt adhesive to obtain the non-asphalt self-adhesive EVA composite waterproof board.
6. The processing technology of the non-asphalt self-adhesive EVA composite waterproof board according to claim 5, characterized in that: in the processing technology, glue coating equipment is required, the glue coating equipment comprises a frame, a glue inlet pipe and a glue film head, the frame is provided with a traction roller for transmitting the EVA waterproof base material, the side edge of the traction roller is obliquely provided with the rubber membrane head vertical to the EVA waterproof base material, the top of the rubber membrane head is communicated with the rubber inlet pipe, the rubber membrane head comprises a shell, a driving rubber roller and a driven rubber roller, wherein a rubber inlet, a driven rubber roller clamping part and a driving rubber roller clamping part are sequentially arranged from top to bottom on the shell, the rubber inlet is communicated with the rubber inlet, a plurality of rows of teeth distributed along the axial direction are arranged on the driven rubber roller, a tooth groove which is meshed with the teeth and extends towards the driving rubber roller is arranged on the shell, an extrusion groove is formed in the position, opposite to the teeth, of the driving rubber roller, a spring top cap is arranged in the extrusion groove and comprises a cover, a key shaft and a spring, the spring is located in the key shaft, and the cover is located at the top of the key shaft.
7. The processing technology of the non-asphalt self-adhesive EVA composite waterproof board according to claim 6, characterized in that: the included angle between the glue film head and the horizontal direction is 45 degrees.
8. The processing technology of the non-asphalt self-adhesive EVA composite waterproof board according to claim 7, characterized in that: and an extrusion spring for extruding the shell towards the EVA waterproof base material is arranged on the rack.
9. The processing technology of the non-asphalt self-adhesive EVA composite waterproof board according to claim 8, characterized in that: and the active rubber roller clamping part is provided with a stop piece for limiting the rotation of the active rubber roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010388597.7A CN111425228A (en) | 2020-05-09 | 2020-05-09 | Non-asphalt self-adhesive EVA composite waterproof board and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010388597.7A CN111425228A (en) | 2020-05-09 | 2020-05-09 | Non-asphalt self-adhesive EVA composite waterproof board and processing technology thereof |
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| CN111425228A true CN111425228A (en) | 2020-07-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750466A (en) * | 2021-01-11 | 2022-07-15 | 昆明路迈土工合成材料制造有限公司 | EVA waterproof board and preparation method thereof |
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| CN114763454A (en) * | 2021-01-11 | 2022-07-19 | 昆明路迈土工合成材料制造有限公司 | EVA composite waterproof board and processing technology thereof |
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Application publication date: 20200717 |