CN111019538A - Double-layer co-extrusion coating hot melt adhesive waterproof coiled material and production process thereof - Google Patents
Double-layer co-extrusion coating hot melt adhesive waterproof coiled material and production process thereof Download PDFInfo
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- CN111019538A CN111019538A CN201911115061.1A CN201911115061A CN111019538A CN 111019538 A CN111019538 A CN 111019538A CN 201911115061 A CN201911115061 A CN 201911115061A CN 111019538 A CN111019538 A CN 111019538A
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C09J123/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C09J123/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to the field of waterproof coiled materials, and discloses a double-layer co-extrusion coating hot melt adhesive waterproof coiled material and a production process thereof. The production process comprises the following steps: controlling a first screw in a first material cylinder to feed a first hot melt adhesive to a first gear pump, and controlling a second screw in a second material cylinder to feed a second hot melt adhesive to a second gear pump; controlling a first gear pump to feed a first hot melt adhesive to the dispenser, and controlling a second gear pump to feed a second hot melt adhesive to the dispenser; and the control distributor respectively guides the first hot melt adhesive and the second hot melt adhesive into the T-shaped port mould to be intersected so as to enable the first hot melt adhesive and the second hot melt adhesive to be mutually bonded, and a double-layer hot melt adhesive structure is obtained. The double-layer co-extrusion coating hot melt adhesive waterproof coiled material is better in comprehensive performance and waterproof effect, higher in efficiency of the production process, capable of simultaneously extruding hot melt adhesive layers of two layers of different thicknesses and different systems, and capable of solving the problem of mutual permeation when the hot melt adhesive layers of different systems are mutually adhered.
Description
Technical Field
The invention relates to the field of waterproof coiled materials, in particular to a double-layer co-extrusion coating hot melt adhesive waterproof coiled material and a production process thereof.
Background
The waterproof coiled material is a curlable sheet waterproof material made of asphalt, rubber or other organic materials, commonly called felt or asphalt felt, and is one of important varieties of waterproof materials in building engineering. According to different main composition materials, the waterproof material is divided into an asphalt waterproof coiled material, a high polymer modified asphalt waterproof coiled material and a synthetic polymer waterproof coiled material; the coiled materials are divided into coiled materials without a matrix, coiled materials with a paper matrix, coiled materials with a glass fiber matrix, coiled materials with a glass cloth matrix and coiled materials with a polyethylene matrix according to different matrixes. The waterproof roll is required to have good water resistance, stability to temperature change (no flow, no bubble, no disturbance at high temperature, no brittle fracture at low temperature), certain mechanical strength, extensibility and fracture resistance, certain flexibility and aging resistance and the like.
Current waterproofing membrane includes substrate layer, viscose layer and isolation layer, the substrate layer with pass through between the isolation layer the viscose layer is connected. The existing adhesive layer is generally of a single-layer structure, is thin, has poor associativity with house buildings, cannot play a good waterproof effect, and has the hidden trouble of water channeling. The viscose layer is generally by the adhesive coating of the same race or with the system form on a side of substrate layer, because coating process restriction, in order to make the adhesive be in even level and smooth distribution on a side of substrate layer, coating weight at every turn is all few, leads to forming thicker viscose layer, needs the coating many times, can operate after the adhesive drying and shaping that all will wait to coat last time at every turn, and efficiency is lower, and the coating number of times is more moreover, and the difference of the viscose layer of different batches of waterproofing membrane is bigger, and the thickness of viscose layer is difficult to control.
In order to make the overall performance of the adhesive layer better, if the adhesive of different systems is used to coat the previous adhesive layer to form another adhesive layer, the coating process requires the adhesive to have good fluidity, and the adhesive of different systems with good fluidity may penetrate into the previous adhesive layer to affect the quality of the previous adhesive layer.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a double-layer co-extrusion coating hot melt adhesive waterproof coiled material with better comprehensive performance and waterproof effect and a production process thereof.
The purpose of the invention is realized by the following technical scheme:
a production process of a double-layer co-extrusion coating hot melt adhesive waterproof coiled material comprises the following steps:
controlling a first screw in a first cylinder of an extruder to feed a first hot melt adhesive to a first gear pump, and controlling a second screw in a second cylinder of the extruder to feed a second hot melt adhesive to a second gear pump;
controlling said first gear pump to feed said first hot melt adhesive to a dispenser of said extruder, controlling said second gear pump to feed said second hot melt adhesive to said dispenser;
controlling the dispenser to respectively guide the first hot melt adhesive and the second hot melt adhesive into a T-shaped port die of the extruder to be intersected so as to enable the first hot melt adhesive and the second hot melt adhesive to be mutually adhered to obtain a double-layer hot melt adhesive structure, wherein the second hot melt adhesive is positioned above the first hot melt adhesive;
and controlling the T-shaped neck mold to extrude the double-layer hot melt adhesive structure onto the polymer substrate layer, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll.
In one embodiment, if the first hot melt adhesive is an SBC system hot melt pressure sensitive adhesive, and the second hot melt adhesive is a macromolecule butyl hot melt adhesive, when the first hot melt adhesive and the second hot melt adhesive are joined together in the T-shaped die, the temperature of the first hot melt adhesive is controlled to be 100 ℃ to 120 ℃, and the temperature of the second hot melt adhesive is controlled to be 120 ℃ to 140 ℃.
In one embodiment, if the first hot melt adhesive and the second hot melt adhesive are both SBC system hot melt pressure sensitive adhesives, when the first hot melt adhesive and the second hot melt adhesive are intersected in the T-shaped die, the temperatures of the first hot melt adhesive and the second hot melt adhesive are both controlled to be 100 ℃ to 120 ℃.
In one embodiment, if the first hot melt adhesive and the second hot melt adhesive are both high-molecular butyl hot melt adhesives, when the first hot melt adhesive and the second hot melt adhesive are intersected in the T-shaped die, the temperatures of the first hot melt adhesive and the second hot melt adhesive are both controlled to be 120-140 ℃.
In one embodiment, in the double-layer hot melt adhesive structure, the thickness of the first hot melt adhesive is greater than that of the second hot melt adhesive.
In one embodiment, after the operation of obtaining the double-layer co-extrusion coating hot melt adhesive waterproof roll, a release film is further attached on the upper surface of the double-layer hot melt adhesive structure, and then a rolling operation, a drying operation, an edge cutting operation and a winding operation are performed.
In one embodiment, after the operation of obtaining the double-layer co-extrusion coated hot melt adhesive waterproof roll, a sand-coating operation or an anti-sticking coating is further performed on the upper surface of the double-layer hot melt adhesive structure to form a sand-coated layer or an anti-sticking coating on the upper surface of the double-layer hot melt adhesive structure, followed by a rolling operation, a drying operation, a trimming operation, and a winding operation.
A double-layer co-extrusion coating hot melt adhesive waterproof coiled material comprises a high-molecular substrate layer, a double-layer hot melt adhesive structure and a release layer;
the double-layer hot melt adhesive structure comprises a first hot melt adhesive layer and a second hot melt adhesive layer, the first hot melt adhesive layer is attached to one side face of the high polymer base material layer, and the second hot melt adhesive layer is attached to one side face, far away from the high polymer base material layer, of the first hot melt adhesive layer; the release layer is attached to one side surface, far away from the first hot melt adhesive layer, of the second hot melt adhesive layer;
the first hot melt adhesive layer is an SBC system hot melt pressure sensitive adhesive layer, and the second hot melt adhesive layer is a macromolecule butyl hot melt adhesive layer; both the first hot melt adhesive layer and the second hot melt adhesive layer are SBC system hot melt pressure sensitive adhesive layers; and the first hot melt adhesive layer and the second hot melt adhesive layer are both macromolecule butyl hot melt adhesive layers.
In one embodiment, the SBC system hot melt pressure sensitive adhesive comprises the following components in parts by mass: 5 to 20 portions of plasticizer, 15 to 30 portions of polyisobutylene, 20 to 50 portions of thermoplastic elastomer, 30 to 60 portions of tackifying resin and 0.1 to 1.0 portion of antioxidant.
In one embodiment, the macromolecular butyl hot melt adhesive comprises the following components in parts by mass: 15 to 30 portions of butyl rubber, 5 to 15 portions of SEBS thermoplastic elastomer, 10 to 20 portions of hydrogenated rosin tackifying resin, 15 to 25 portions of terpene tackifying resin, 30 to 45 portions of rubber plasticizer, 0.5 to 1.5 portions of pigment and 0.5 to 1.0 portion of antioxidant.
Compared with the prior art, the invention has at least the following advantages:
this double-deck coextrusion coating hot melt adhesive waterproofing membrane has double-deck hot melt adhesive, for individual layer viscose layer, its comprehensive properties is better and water-proof effects is better. For the coating technology, the efficiency of the production technology of the double-layer co-extrusion coating hot melt adhesive waterproof roll is higher, the flowability of the first hot melt adhesive fluid and the second hot melt adhesive fluid is required to be poorer, two layers of hot melt adhesives with different thicknesses can be extruded simultaneously, particularly, two layers of hot melt adhesives with different thicknesses and different systems can be extruded simultaneously, the problem that the hot melt adhesive layers can permeate each other when being adhered to each other can be solved, and the problem that the hot melt adhesive layers of different systems can permeate each other when being adhered to each other can be solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flow chart showing the steps of a production process of a double-layer co-extrusion coated hot melt adhesive waterproof roll according to an embodiment of the present invention.
Fig. 2 is a layout diagram of the apparatus for manufacturing a double-layer co-extrusion coated hot melt adhesive waterproof roll according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a double-layer co-extruded coated hot melt adhesive waterproof roll according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a polymer substrate layer of a double-layer co-extruded coated hot melt adhesive waterproof roll according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, referring to fig. 1 and 2, a process for manufacturing a double-layer co-extruded hot melt adhesive coated waterproof roll includes the following steps:
s110, controlling a first screw 230 in a first cylinder 210 of the extruder 20 to feed a first hot melt adhesive 121 to a first gear pump 250, and controlling a second screw 240 in a second cylinder 220 of the extruder 20 to feed a second hot melt adhesive 122 to a second gear pump 260;
s120, controlling said first gear pump 250 to feed said first hot melt adhesive 121 to a dispenser of said extruder 20, controlling said second gear pump 260 to feed said second hot melt adhesive 122 to said dispenser;
s130, controlling the dispenser 270 to respectively guide the first hot melt adhesive 121 and the second hot melt adhesive 122 into a T-shaped die 280 of the extruder 20 for intersection, so that the first hot melt adhesive 121 and the second hot melt adhesive 122 are bonded to each other, thereby obtaining a double-layer hot melt adhesive structure, wherein the second hot melt adhesive 122 is located on the first hot melt adhesive 121;
s140, controlling the T-shaped opening die 280 to extrude the double-layer hot melt adhesive structure onto the polymer substrate layer, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll.
In the above-mentioned embodiment, referring to fig. 1 and fig. 2, the extruder 20 includes the first cylinder 210, the first screw 230, the first gear pump 250, the second cylinder 220, the second screw 240, the second gear pump 260, the distributor 270 and the T-die 280, the first screw 230 is disposed in the first cylinder 210, the second screw 240 is disposed in the second cylinder 220, the first gear pump 250 includes two first gears 251 engaged with each other, a first flow channel 252 is formed between the two first gears 251, the second gear pump 260 includes two second gears 261 engaged with each other, a second flow channel 262 is formed between the two second gears 261, a first end of the first flow channel 252 is communicated with the first cylinder 210, a first end of the second flow channel 262 is communicated with the second cylinder 220, the distributor is opened with a first layered channel 271 and a second layered channel 272, the first layered channel 271 and the second layered channel 272 are separated from each other and do not interfere with each other, the first layered channel 271 is located above the second layered channel 272, a first end of the first layered channel 271 is communicated with a second end of the first flow channel 252, a first end of the second layered channel 272 is communicated with a second end of the second flow channel 262, the T-shaped opening 280 is provided with a wide flow channel 281 and a narrow flow channel 282, second ends of the first layered channel 271 and the second layered channel 272 are respectively communicated with a first end of the wide flow channel 281, a second end of the wide flow channel 281 is communicated with the narrow flow channel 282, and a width of the wide flow channel 281 is greater than a width of the narrow flow channel 282.
In step S110, the first hot melt adhesive 121 is in a molten state and is contained in the first cylinder 210, and the first hot melt adhesive 121 is kneaded by the rotation of the first screw 230 while the first hot melt adhesive 121 is fed to the first gear 251 pump 250 at an even speed; second hot melt adhesive 122 is in a molten state and contained in second cartridge 220, and second hot melt adhesive 122 is kneaded by rotation of second screw 240 while second hot melt adhesive 122 is fed at a uniform speed to second gear 261 pump 260.
In step S120, the first hot melt adhesive 121 is fed from the first flow path 252 to the dispenser 270 at a uniform rate through the meshing rotation between the two first gears 251; second hot melt adhesive 122 is fed from second flow path 262 into dispenser 270 at an even rate by means of the meshing rotation between two second gears 261.
In step S130, under the guiding flow of the first layered passage 271, the first hot melt adhesive 121 enters the T-shaped port mold 280; under the drainage of the second layered passage 272, the second hot melt adhesive 122 enters the T-shaped opening 280, and since the first layered passage 271 is located above the second layered passage 272, the second hot melt adhesive 122 is located above the first hot melt adhesive 121, when the first hot melt adhesive 121 and the second hot melt adhesive 122 enter the narrow flow passage 282 through the wide flow passage 281, since the width of the wide flow passage 281 is greater than the width of the narrow flow passage 282, the first hot melt adhesive 121 and the second hot melt adhesive 122 will intersect, so that the two are bonded to each other to form a double-layer hot melt adhesive structure. As such, by adjusting the rotational speed of the first screw 230 and the rotational speed of the first gear 251 pump 250, the thickness of the first hot melt adhesive 121 fluid prior to entering the T-die 280 can be varied; by adjusting the rotational speed of the second screw 240 and the rotational speed of the second gear 261 pump 260, the thickness of the second hot melt adhesive 122 fluid prior to entering the T-die 280 can be varied; by adjusting the width ratio of wide flow passages 281 to narrow flow passages 282, the ratio of the thicknesses of first hot melt adhesive 121 fluid and second hot melt adhesive 122 fluid can be varied; so can extrude the hot melt adhesive layer of two-layer different thickness simultaneously. In a similar way, the thickness consistency of the double-layer hot melt adhesive structures of different batches can be kept by keeping the parameters unchanged.
In step S140, the double-layer hot melt adhesive structure in the narrow flow channel 282 is extruded on the polymer substrate layer, and a cooling operation is performed, so that after the temperature of the double-layer hot melt adhesive structure is reduced to normal temperature and solidified, the polymer substrate layer and the double-layer hot melt adhesive structure together form a double-layer co-extruded coated hot melt adhesive waterproof roll. The double-layer coextrusion coating hot melt adhesive waterproof coiled material has double-layer hot melt adhesive, and compared with a single-layer adhesive layer, the double-layer coextrusion coating hot melt adhesive waterproof coiled material has better comprehensive performance and better waterproof effect. Compared with the coating process, the production process of the double-layer co-extrusion coating hot melt adhesive waterproof roll has high efficiency, requires poor flowability of the first hot melt adhesive 121 fluid and the second hot melt adhesive 122 fluid, can extrude two layers of hot melt adhesives with different thicknesses simultaneously, particularly can extrude two layers of hot melt adhesives with different thicknesses and different systems simultaneously, can solve the problem of mutual permeation when the hot melt adhesive layers are mutually bonded, and particularly can solve the problem of mutual permeation when the hot melt adhesive layers of different systems are mutually bonded.
In one embodiment, if the first hot melt adhesive 121 is an SBC system hot melt pressure sensitive adhesive, and the second hot melt adhesive 122 is a macromolecule butyl hot melt adhesive, when the first hot melt adhesive 121 and the second hot melt adhesive 122 are intersected in the T-shaped opening 280, the temperature of the first hot melt adhesive 121 is controlled to be 100 ℃ to 120 ℃, and the temperature of the second hot melt adhesive 122 is controlled to be 120 ℃ to 140 ℃.
It should be noted that, as mentioned above, the production process of the double-layer co-extrusion coated hot melt adhesive waterproof roll requires that the flowability of the first hot melt adhesive 121 and the second hot melt adhesive 122 is poor compared to the coating process, and therefore, in order to enable the first hot melt adhesive 121 and the second hot melt adhesive 122 to be well and firmly combined, it becomes a crucial factor to control the relative flowability of the first hot melt adhesive 121 and the second hot melt adhesive 122. Because the SBC system hot-melt pressure-sensitive adhesive and the high-molecular butyl hot-melt adhesive are two different systems of adhesives, and the two adhesives have different temperature characteristics, the extrusion temperatures of the two adhesives need to be respectively and reasonably controlled to control the flowability of the two adhesives within a reasonable range, so that the first hot-melt adhesive 121 and the second hot-melt adhesive 122 can be well and firmly combined.
If the temperature of the first hot melt adhesive 121, that is, the SBC system hot melt pressure sensitive adhesive, is lower than 100 ℃, due to the property of the SBC system hot melt pressure sensitive adhesive, the flowability of the first hot melt adhesive 121 is too poor to meet the requirement, even the first hot melt adhesive is not melted; if the temperature of the first hot melt adhesive 121, i.e., the SBC system hot melt pressure sensitive adhesive, is higher than 120 ℃, the fluidity of the first hot melt adhesive 121 is too good due to the nature of the SBC system hot melt pressure sensitive adhesive, resulting in adhesive picking and infiltration of the second hot melt adhesive 122. If the temperature of the second hot melt adhesive 122, i.e., the polymeric butyl hot melt adhesive, is lower than 120 ℃, due to the properties of the polymeric butyl hot melt adhesive, the fluidity of the first hot melt adhesive 121 is too poor to meet the requirements, even the first hot melt adhesive is not melted; if the temperature of the second hot melt adhesive 122, i.e., the polymeric butyl hot melt adhesive, is higher than 140 ℃, due to the properties of the polymeric butyl hot melt adhesive, the fluidity of the first hot melt adhesive 121 is too good, which results in adhesive scraping and infiltration of the first hot melt adhesive 121. Only when the temperature of the first hot melt adhesive 121 is controlled to be 100-120 ℃ and the temperature of the second hot melt adhesive 122 is controlled to be 120-140 ℃, the first hot melt adhesive 121 and the second hot melt adhesive 122 can keep a good soft state, good wettability and good adhesiveness when meeting, so that the first hot melt adhesive 121 and the second hot melt adhesive can be well and firmly combined, but the glue scraping and the mutual permeation caused by too good fluidity cannot occur.
It can be understood that, compared with the high-molecular butyl hot melt adhesive, the hot melt pressure sensitive adhesive of the SBC system has thinner texture and better fluidity, while the high-molecular butyl hot melt adhesive has thicker texture and poorer fluidity, the thinner adhesive is arranged below the thicker adhesive, and the thicker adhesive is arranged above the thinner adhesive, so that the adhesive collapse phenomenon is very easy to occur due to the fact that the hot melt pressure sensitive adhesive of the SBC system is too thinner if the fluidity of the two can not be well controlled. Further, in the case of the SBC system hot melt pressure sensitive adhesive and the high molecular butyl hot melt adhesive, since the both are more likely to be aged by the thermal oxidation reaction as the temperature is higher, the temperature should be as low as possible while maintaining the good soft state, the good wettability and the good adhesiveness. Under comprehensive consideration, the temperature of the SBC system hot melt pressure sensitive adhesive is preferably 100-120 ℃, and the temperature of the macromolecular butyl hot melt adhesive is preferably 120-140 ℃.
Meanwhile, the SBC system hot-melt pressure-sensitive adhesive has poor comprehensive performance and low cost, the polymer butyl hot-melt adhesive has high comprehensive performance and high cost, and a high-performance double-layer hot-melt adhesive structure can be obtained in a most economic combination mode through the combination of the SBC system hot-melt pressure-sensitive adhesive and the polymer butyl hot-melt adhesive, so that the economic benefit of the double-layer co-extrusion coating hot-melt adhesive waterproof coiled material is improved.
In order to further improve the bonding firmness of the first hot melt adhesive 121 and the second hot melt adhesive 122, in one embodiment, when the first hot melt adhesive 121 and the second hot melt adhesive 122 meet in the T-shaped die 280, the viscosity of the first hot melt adhesive 121 is controlled to be 200000cps to 300000cps, and the viscosity of the second hot melt adhesive 122 is controlled to be 2000000cps or more. The bonding firmness of first hot melt adhesive 121 and second hot melt adhesive 122 can be further improved.
In order to enable the first hot melt adhesive 121 and the second hot melt adhesive 122 to be well and firmly combined, in an embodiment, if both the first hot melt adhesive 121 and the second hot melt adhesive 122 are SBC system hot melt pressure sensitive adhesives, when the first hot melt adhesive 121 and the second hot melt adhesive 122 are intersected in the T-shaped opening mold 280, the temperatures of both the first hot melt adhesive 121 and the second hot melt adhesive 122 are controlled to be 100 ℃ to 120 ℃. This enables first hot melt adhesive 121 and second hot melt adhesive 122 to be well and firmly bonded.
In order to enable the first hot melt adhesive 121 and the second hot melt adhesive 122 to be well and firmly combined, in an embodiment, if the first hot melt adhesive 121 and the second hot melt adhesive 122 are both high-molecular butyl hot melt adhesives, when the first hot melt adhesive 121 and the second hot melt adhesive 122 are intersected in the T-shaped opening mold 280, the temperatures of the first hot melt adhesive 121 and the second hot melt adhesive 122 are controlled to be 120 ℃ to 140 ℃. This enables first hot melt adhesive 121 and second hot melt adhesive 122 to be well and firmly bonded.
In order to further avoid the glue collapse phenomenon caused by the heavier second hot melt adhesive 122, in an embodiment, in the double-layer hot melt adhesive structure, the thickness of the first hot melt adhesive 121 is greater than that of the second hot melt adhesive 122. This further avoids the occurrence of glue collapse due to the heavier weight of second hot melt adhesive 122.
In one embodiment, the thickness of the first hot melt adhesive layer 121 is 0.25mm to 0.50mm, for example, the thickness of the first hot melt adhesive layer 121 is 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, and 0.50 mm. The thickness of the second hot melt adhesive layer 122 is 0.15mm to 0.30mm, for example, the thickness of the second hot melt adhesive layer 122 is 0.15mm, 0.18mm, 0.21mm, 0.24mm, 0.27mm, and 0.30 mm.
In order to improve the anti-sticking and anti-pollution effects of the double-layer hot melt adhesive structure, in one embodiment, after the operation of obtaining the double-layer co-extrusion coating hot melt adhesive waterproof roll, a release film is further attached to the upper surface of the double-layer hot melt adhesive structure, and then rolling operation, drying operation, edge cutting operation and rolling operation are performed. So can improve the antiseized anti-pollution effect of double-deck hot melt adhesive structure to make double-deck coextrusion coating hot melt adhesive waterproofing membrane level more.
In order to improve the anti-sticking and anti-pollution effects of the double-layer hot melt adhesive structure, in one embodiment, after the operation of obtaining the double-layer co-extrusion coated hot melt adhesive waterproof roll, a sand-coating operation or an anti-sticking coating is further performed on the upper surface of the double-layer hot melt adhesive structure to form a sand-coated layer or an anti-sticking coating on the upper surface of the double-layer hot melt adhesive structure, followed by a rolling operation, a drying operation, an edge cutting operation, and a winding operation. So can improve the antiseized anti-pollution effect of double-deck hot melt adhesive structure to make double-deck coextrusion coating hot melt adhesive waterproofing membrane level more.
In one embodiment, referring to fig. 3, a double-layer co-extruded coated hot melt adhesive waterproof roll 10 includes a polymer substrate layer 110, a double-layer hot melt adhesive structure 120, and a release layer 130; the double-layer hot melt adhesive structure 120 comprises a first hot melt adhesive layer 121 and a second hot melt adhesive layer 122, wherein the first hot melt adhesive layer 121 is attached to one side surface of the polymer substrate layer 110, and the second hot melt adhesive layer 122 is attached to one side surface of the first hot melt adhesive layer 121 far away from the polymer substrate layer 110; the release layer 130 is attached to one side of the second hot melt adhesive layer 122 away from the first hot melt adhesive layer 121; the first hot melt adhesive layer 121 is an SBC hot melt pressure sensitive adhesive layer, and the second hot melt adhesive layer 122 is a polymer butyl hot melt adhesive layer; or both the first hot melt adhesive layer 121 and the second hot melt adhesive layer 122 are SBC hot melt pressure sensitive adhesive layers; or the first hot melt adhesive layer 121 and the second hot melt adhesive layer 122 are both macromolecule butyl hot melt adhesive layers. Thus, the double-layer co-extrusion coating hot melt adhesive waterproof roll 10 has double-layer hot melt adhesive, and compared with a single-layer adhesive layer, the double-layer co-extrusion coating hot melt adhesive waterproof roll has better comprehensive performance and better waterproof effect. Particularly, by combining the SBC system hot melt pressure sensitive adhesive with the high molecular butyl hot melt adhesive, the high-performance double-layer hot melt adhesive structure 120 can be obtained in the most economical combination manner, and the economic benefit of the double-layer co-extrusion coating hot melt adhesive waterproof roll 10 is improved.
In one embodiment, the SBC system hot melt pressure sensitive adhesive comprises the following components in parts by mass: 5 to 20 portions of plasticizer, 15 to 30 portions of polyisobutylene, 20 to 50 portions of thermoplastic elastomer, 30 to 60 portions of tackifying resin and 0.1 to 1.0 portion of antioxidant. The SBC system hot-melt pressure-sensitive adhesive obtained by properly proportioning the components has the functions of preventing cold flow of an adhesive layer and reducing cost. The viscosity of the product is 200000cps to 300000cps at 100 ℃ to 120 ℃.
In another embodiment, the SBC system hot melt pressure sensitive adhesive comprises the following components in parts by mass: 12.5 parts of plasticizer, 22.5 parts of polyisobutylene, 35 parts of thermoplastic elastomer, 45 parts of tackifying resin and 0.5 part of antioxidant.
In one embodiment, the plasticizer is at least one of naphthenic oil, paraffinic oil, and white oil. For example, the plasticizer is naphthenic oil, paraffinic oil, and white oil. For example, the plasticizer is naphthenic oil, paraffinic oil, or white oil.
In one embodiment, the tackifying resin is at least one of a petroleum resin, a rosin resin, and a terpene resin. For example, the tackifying resins are petroleum resins, rosin resins and terpene resins. For example, the tackifying resin is a petroleum resin, a rosin resin or a terpene resin.
In one embodiment, the petroleum resin is a hydrogenated petroleum resin. For example, the hydrogenated petroleum resin has a hydrogenation degree of 50% to 99%.
In one embodiment, the antioxidant is at least one of β (3, 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate and dioctadecyl alcohol pentaerythritol diphosphite, for example, β (3, 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate and dioctadecyl alcohol pentaerythritol diphosphite, for example, β (3, 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate or dioctadecyl alcohol pentaerythritol diphosphite.
One embodiment of the invention provides a preparation method of the SBC system hot melt pressure sensitive adhesive, which comprises the following steps: stirring and mixing 5 to 20 parts of plasticizer, 15 to 30 parts of polyisobutylene and 0.1 to 1.0 part of antioxidant under the vacuum condition, heating to 130 to 150 ℃, adding 20 to 50 parts of thermoplastic elastomer, continuously heating to 150 to 170 ℃, and carrying out heat preservation, stirring and mixing under the vacuum condition until the thermoplastic elastomer is molten; and then adding 30-60 parts of tackifying resin, and stirring and mixing under vacuum condition to completely melt each component to obtain the SBC system hot-melt pressure-sensitive adhesive.
In one embodiment, the macromolecular butyl hot melt adhesive comprises the following components in parts by mass: 15 to 30 portions of butyl rubber, 5 to 15 portions of SEBS thermoplastic elastomer, 10 to 20 portions of hydrogenated rosin tackifying resin, 15 to 25 portions of terpene tackifying resin, 30 to 45 portions of rubber plasticizer, 0.5 to 1.5 portions of pigment and 0.5 to 1.0 portion of antioxidant. The obtained macromolecular butyl hot melt adhesive has the characteristics of good initial adhesion, good weather resistance, good water resistance, good ultraviolet resistance and the like through the components in proper proportion. The viscosity of the product can reach 2000000cps at 120-140 deg.C.
In another embodiment, the macromolecular butyl hot melt adhesive comprises the following components in parts by mass: 22.5 parts of butyl rubber, 10 parts of SEBS thermoplastic elastomer, 15 parts of hydrogenated rosin tackifying resin, 20 parts of terpene tackifying resin, 37.5 parts of rubber plasticizer, 1.0 part of pigment and 0.75 part of antioxidant.
In one embodiment, the butyl rubber has an unsaturation degree (%/mol) of less than 2% and a Mooney viscosity (ML1+8, 125 ℃) of 40 to 60.
In one embodiment, the SEBS thermoplastic elastomer has a styrene block content of no greater than 20%.
In one embodiment, the hydrogenated rosin-based tackifying resin is at least one of a hydrogenated rosin resin and a hydrogenated rosin-modified resin. For example, the hydrogenated rosin-based tackifying resin is a hydrogenated rosin resin and a hydrogenated rosin-modified resin. For example, the hydrogenated rosin-based tackifying resin is a hydrogenated rosin resin or a hydrogenated rosin-modified resin. For example, the hydrogenated rosin-based tackifying resin is solid at ordinary temperature and has a ring and ball softening point of not higher than 90 ℃.
In one embodiment, the terpene-based tackifying resin is at least one of a polymerized terpene resin, a terpene-styrene resin, and a terpene-phenol resin. For example, the terpene-based tackifying resins are polymerized terpene resins, terpene styrene resins, and terpene phenol resins. For example, the terpene-based tackifying resin is a polymerized terpene resin, a terpene styrene resin, or a terpene phenol resin. For example, the terpene-based tackifying resin is a solid at room temperature and has a ring and ball softening point of not less than 100 ℃.
In one embodiment, the rubber plasticizer is at least one of a cycloalkyl rubber softening oil and a liquid polyisobutylene rubber. For example, the rubber plasticizer is a cycloalkyl rubber softening oil and a liquid polyisobutylene rubber. For example, the rubber plasticizer is a cycloalkyl rubber softening oil or a liquid polyisobutylene rubber. For example, the rubber plasticizer has a viscosity of 50cps to 150cps at 40 ℃. For example, the liquid polyisobutylene rubber has an average molecular weight of 400-2400.
In one embodiment, the pigment is rutile titanium dioxide. For example, the pigment has a particle size of less than 3000 mesh.
In one embodiment, the antioxidant is at least one of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [ 2.4-di-tert-butylphenyl ] phosphite and n-octadecyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, for example, the antioxidant is pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [ 2.4-di-tert-butylphenyl ] phosphite and n-octadecyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, for example, the antioxidant is pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [ 2.4-di-tert-butylphenyl ] phosphite or n-octadecyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
One embodiment of the invention provides a preparation method of a macromolecular butyl hot melt adhesive, which comprises the following steps: adding 15 to 30 parts of butyl rubber, 5 to 15 parts of SEBS thermoplastic elastomer, 30 to 45 parts of rubber plasticizer, 0.5 to 1.5 parts of pigment and 0.5 to 1.0 part of antioxidant into a kneader; then slowly heating to 150-170 ℃, stirring until all materials are melted, and stabilizing the reaction for 5-20 min; then, adding 10 to 20 parts of hydrogenated rosin tackifying resin and 15 to 25 parts of terpene tackifying resin while stirring, and stirring for 45 to 60 minutes; and finally, cooling and forming to obtain the macromolecular butyl hot melt adhesive.
In one embodiment, the polymer substrate layer 110 is an HDPE substrate layer, a TPO substrate layer, an aluminum foil, an aluminum-plated film, or a cross-film.
In an embodiment, referring to fig. 4, the polymer substrate layer 110 includes a polyurethane wear-resistant layer 111, a metal heat-insulating layer 112, a TiO2 nano-coating layer 113, and an HDPE base layer 114, the HDPE base layer 114 is attached to a side of the first hot-melt adhesive layer 121 away from the second hot-melt adhesive layer 122, the TiO2 nano-coating layer 113 is coated on a side of the HDPE base layer 114 away from the first hot-melt adhesive layer 121, the metal heat-insulating layer 112 is connected to a side of the TiO2 nano-coating layer 113 away from the HDPE base layer 114, and the polyurethane wear-resistant layer 111 is connected to a side of the metal heat-insulating layer 112 away from the TiO2 nano-coating layer 113. It should be noted that HDPE, i.e. high density polyethylene, has good heat resistance and cold resistance, good chemical stability, higher rigidity and toughness, good mechanical strength, better hardness, tensile strength and creep property than low density polyethylene, better wear resistance, electrical insulation, toughness and cold resistance, small permeability to water vapor and air, and low water absorption. However, the aging resistance is poor, the environmental cracking resistance is inferior to that of the low density polyethylene, and the thermal oxidation in particular deteriorates the performance, and the heat-shielding, light-shielding, and oxidation-preventing effects of the metal heat-insulating layer 112 and the absorption and reflection effects of the TiO2 nano-coating layer 113 to ultraviolet rays are improved. And the high transparent polyurethane wear-resistant layer 111 is added, so that the polymer base material layer 110 has the characteristics of wear resistance, heat insulation, light shielding, UV absorption, heat resistance, cold resistance, good mechanical strength and the like.
In one embodiment, the edges of the polyurethane abrasion-resistant layer 111, the metal thermal insulation layer 112 and the HDPE substrate layer 114 are aligned, and the edges of the TiO2 nanocoating 113 extend inward such that the width of the TiO2 nanocoating 113 is less than the width of the HDPE substrate layer 114. Through the overall shielding of the HDPE substrate layer 114 on the TiO2 nano-coating 113, the problem that the viscosity of the double-layer hot melt adhesive structure 120 is reduced due to the fact that TiO2 nano-particles of the TiO2 nano-coating 113 migrate to the double-layer hot melt adhesive structure 120 can be avoided.
In one embodiment, the polymer substrate layer 110 has a thickness of 1.5mm to 2.0 mm. For example, the thickness of the polymer substrate layer 110 is 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0 mm.
In one embodiment, the release layer 130 is a release film, a sand-coated layer, or an anti-adhesive coating.
In one embodiment, the edge of the polymer substrate layer 110, the edge of the first hot-melt adhesive layer 121, and the edge of the second hot-melt adhesive layer 122 are aligned, and the edge of the release layer 130 extends outward to make the width of the release film layer greater than the width of the second hot-melt adhesive layer 122. So that the release layer 130 can be easily peeled off through the wider release layer 130.
In one embodiment, the thickness of the release layer 130 is 0.5mm to 1.0 mm. For example, the thickness of the release layer 130 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0 mm.
Compared with the prior art, the invention has at least the following advantages:
the double-layer co-extrusion coating hot melt adhesive waterproof roll 10 has double-layer hot melt adhesive, and compared with a single-layer adhesive layer, the double-layer co-extrusion coating hot melt adhesive waterproof roll has better comprehensive performance and better waterproof effect. Compared with the coating process, the production process of the double-layer co-extrusion coating hot melt adhesive waterproof roll 10 has high efficiency, requires that the flowability of the first hot melt adhesive 121 fluid and the second hot melt adhesive 122 fluid is poor, can extrude two layers of hot melt adhesives with different thicknesses at the same time, particularly can extrude two layers of hot melt adhesives with different thicknesses and different systems at the same time, can solve the problem of mutual permeation when the hot melt adhesive layers are mutually bonded, and particularly can solve the problem of mutual permeation when the hot melt adhesive layers of different systems are mutually bonded.
The following is a section of a specific example of the process for producing the double-layer co-extruded hot melt adhesive-coated waterproof roll material 10
Example 1
Controlling a first screw 230 in a first cylinder 210 of the extruder 20 to feed the SBC hot-melt pressure-sensitive adhesive to a first gear 251 pump 250, and controlling a second screw 240 in a second cylinder 220 of the extruder 20 to feed the macromolecule butyl hot-melt adhesive to a second gear 261 pump 260;
controlling the first gear 251 pump 250 to feed the SBC system hot melt pressure sensitive adhesive to the dispenser 270 of the extruder 20, and controlling the second gear 261 pump 260 to feed the high molecular butyl hot melt adhesive to the dispenser 270;
controlling the temperature of the SBC system hot melt pressure sensitive adhesive to be 100 ℃, controlling the temperature of the polymer butyl hot melt adhesive to be 120 ℃, controlling the distributor 270 to respectively guide the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive into the T-shaped port die 280 of the extruder 20 to be intersected, so that the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive are bonded with each other, and obtaining a double-layer hot melt adhesive structure 120, wherein the polymer butyl hot melt adhesive is located on the SBC system hot melt pressure sensitive adhesive;
and controlling the T-shaped die 280 to extrude the double-layer hot melt adhesive structure 120 onto the polymer substrate layer 110, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll 10.
Example 2
Controlling a first screw 230 in a first cylinder 210 of the extruder 20 to feed the SBC hot-melt pressure-sensitive adhesive to a first gear 251 pump 250, and controlling a second screw 240 in a second cylinder 220 of the extruder 20 to feed the macromolecule butyl hot-melt adhesive to a second gear 261 pump 260;
controlling the first gear 251 pump 250 to feed the SBC system hot melt pressure sensitive adhesive to the dispenser 270 of the extruder 20, and controlling the second gear 261 pump 260 to feed the high molecular butyl hot melt adhesive to the dispenser 270;
controlling the temperature of the SBC system hot melt pressure sensitive adhesive to be 120 ℃, controlling the temperature of the polymer butyl hot melt adhesive to be 140 ℃, controlling the distributor 270 to respectively guide the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive into a T-shaped port die 280 of the extruder 20 to be intersected, so that the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive are bonded with each other, and obtaining a double-layer hot melt adhesive structure 120, wherein the polymer butyl hot melt adhesive is located on the SBC system hot melt pressure sensitive adhesive;
and controlling the T-shaped die 280 to extrude the double-layer hot melt adhesive structure 120 onto the polymer substrate layer 110, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll 10.
Example 3
Controlling a first screw 230 in a first cylinder 210 of the extruder 20 to feed the SBC hot-melt pressure-sensitive adhesive to a first gear 251 pump 250, and controlling a second screw 240 in a second cylinder 220 of the extruder 20 to feed the macromolecule butyl hot-melt adhesive to a second gear 261 pump 260;
controlling the first gear 251 pump 250 to feed the SBC system hot melt pressure sensitive adhesive to the dispenser 270 of the extruder 20, and controlling the second gear 261 pump 260 to feed the high molecular butyl hot melt adhesive to the dispenser 270;
controlling the temperature of the SBC system hot melt pressure sensitive adhesive to be 110 ℃, controlling the temperature of the polymer butyl hot melt adhesive to be 130 ℃, controlling the distributor 270 to respectively guide the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive into the T-shaped port die 280 of the extruder 20 to be intersected, so that the SBC system hot melt pressure sensitive adhesive and the polymer butyl hot melt adhesive are bonded with each other, and obtaining a double-layer hot melt adhesive structure 120, wherein the polymer butyl hot melt adhesive is located on the SBC system hot melt pressure sensitive adhesive;
and controlling the T-shaped die 280 to extrude the double-layer hot melt adhesive structure 120 onto the polymer substrate layer 110, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll 10.
Example 4
Controlling first screw 230 in first barrel 210 of extruder 20 to feed first hot melt adhesive 121 to first gear 251 pump 250, controlling second screw 240 in second barrel 220 of said extruder 20 to feed second hot melt adhesive 122 to second gear 261 pump 260; the first hot melt adhesive 121 and the second hot melt adhesive 122 are both SBC system hot melt pressure sensitive adhesives;
control said first gear 251 pump 250 to feed said first hot melt adhesive 121 into the dispenser 270 of said extruder 20, control said second gear 261 pump 260 to feed said second hot melt adhesive 122 into said dispenser 270;
controlling the temperatures of the first hot melt adhesive 121 and the second hot melt adhesive 122 to be 110 ℃, and controlling the dispenser 270 to respectively guide the first hot melt adhesive 121 and the second hot melt adhesive 122 into a T-shaped port die 280 of the extruder 20 to be intersected, so that the first hot melt adhesive 121 and the second hot melt adhesive 122 are mutually bonded, and a double-layer hot melt adhesive structure 120 is obtained, wherein the second hot melt adhesive 122 is located above the first hot melt adhesive 121;
and controlling the T-shaped die 280 to extrude the double-layer hot melt adhesive structure 120 onto the polymer substrate layer 110, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll 10.
Example 5
Controlling first screw 230 in first barrel 210 of extruder 20 to feed first hot melt adhesive 121 to first gear 251 pump 250, controlling second screw 240 in second barrel 220 of said extruder 20 to feed second hot melt adhesive 122 to second gear 261 pump 260; the first hot melt adhesive 121 and the second hot melt adhesive 122 are both high-molecular butyl hot melt adhesives;
control said first gear 251 pump 250 to feed said first hot melt adhesive 121 into the dispenser 270 of said extruder 20, control said second gear 261 pump 260 to feed said second hot melt adhesive 122 into said dispenser 270;
controlling the temperatures of the first hot melt adhesive 121 and the second hot melt adhesive 122 to be 130 ℃, and controlling the dispenser 270 to respectively guide the first hot melt adhesive 121 and the second hot melt adhesive 122 into a T-shaped port die 280 of the extruder 20 to be intersected, so that the first hot melt adhesive 121 and the second hot melt adhesive 122 are mutually bonded, and a double-layer hot melt adhesive structure 120 is obtained, wherein the second hot melt adhesive 122 is located above the first hot melt adhesive 121;
and controlling the T-shaped die 280 to extrude the double-layer hot melt adhesive structure 120 onto the polymer substrate layer 110, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll 10.
In the above embodiments, the thickness of each of the first hot melt adhesive layers 121 is 0.35mm, and the thickness of each of the second hot melt adhesive layers 122 is 0.21 mm. The tests of example 1, example 2, example 3, example 4 and example 5 were carried out, and the test results are shown in table 1.
TABLE 1
As can be seen from the above table, although the cost of example 3 is higher than that of example 4, the overall performance of example 3 is far superior to that of example 4. Moreover, the comprehensive performance of the embodiment 3 is basically the same as that of the embodiment 5, and the cost is only 68.75% of that of the embodiment 5, so that the adhesive with poor performance and low cost and the adhesive with high performance and high cost are compounded by a proper method, and the production cost can be greatly reduced while the comprehensive performance is high.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A production process of a double-layer co-extrusion coating hot melt adhesive waterproof coiled material is characterized by comprising the following steps:
controlling a first screw in a first cylinder of an extruder to feed a first hot melt adhesive to a first gear pump, and controlling a second screw in a second cylinder of the extruder to feed a second hot melt adhesive to a second gear pump;
controlling said first gear pump to feed said first hot melt adhesive to a dispenser of said extruder, controlling said second gear pump to feed said second hot melt adhesive to said dispenser;
controlling the dispenser to respectively guide the first hot melt adhesive and the second hot melt adhesive into a T-shaped port die of the extruder to be intersected so as to enable the first hot melt adhesive and the second hot melt adhesive to be mutually adhered to obtain a double-layer hot melt adhesive structure, wherein the second hot melt adhesive is positioned above the first hot melt adhesive;
and controlling the T-shaped neck mold to extrude the double-layer hot melt adhesive structure onto the polymer substrate layer, and cooling to obtain the double-layer co-extruded hot melt adhesive coated waterproof roll.
2. The production process of the double-layer co-extrusion coating hot melt adhesive waterproof roll according to claim 1, wherein if the first hot melt adhesive is an SBC system hot melt pressure sensitive adhesive and the second hot melt adhesive is a macromolecule butyl hot melt adhesive, when the first hot melt adhesive and the second hot melt adhesive are intersected in the T-shaped opening, the temperature of the first hot melt adhesive is controlled to be 100-120 ℃, and the temperature of the second hot melt adhesive is controlled to be 120-140 ℃.
3. The production process of the double-layer co-extrusion coating hot melt adhesive waterproof roll according to claim 1, wherein if the first hot melt adhesive and the second hot melt adhesive are both SBC system hot melt pressure-sensitive adhesives, when the first hot melt adhesive and the second hot melt adhesive are intersected in the T-shaped die, the temperatures of the first hot melt adhesive and the second hot melt adhesive are both controlled to be 100-120 ℃.
4. The production process of the double-layer co-extrusion coating hot melt adhesive waterproof coiled material as claimed in claim 1, wherein if the first hot melt adhesive and the second hot melt adhesive are both high-molecular butyl hot melt adhesives, when the first hot melt adhesive and the second hot melt adhesive are intersected in the T-shaped die, the temperatures of the first hot melt adhesive and the second hot melt adhesive are both controlled to be 120-140 ℃.
5. The production process of the double-layer co-extrusion coating hot melt adhesive waterproof roll material as claimed in any one of claims 1 to 4, wherein in the double-layer hot melt adhesive structure, the thickness of the first hot melt adhesive is larger than that of the second hot melt adhesive.
6. The production process of the double-layer co-extrusion coated hot melt adhesive waterproof roll according to claim 5, wherein after the operation of obtaining the double-layer co-extrusion coated hot melt adhesive waterproof roll, a release film is further attached on the upper surface of the double-layer hot melt adhesive structure, and then a rolling operation, a drying operation, an edge cutting operation and a winding operation are performed.
7. The process for producing a double-layered co-extruded coated hot melt adhesive waterproof roll according to claim 5, wherein after the operation of obtaining a double-layered co-extruded coated hot melt adhesive waterproof roll, a sanding operation or an anti-adhesive coating is further performed on the upper surface of the double-layered hot melt adhesive structure to form a sanding layer or an anti-adhesive coating on the upper surface of the double-layered hot melt adhesive structure, followed by a rolling operation, a drying operation, a trimming operation and a winding operation.
8. A double-layer co-extrusion coating hot melt adhesive waterproof coiled material is characterized by comprising a high-molecular base material layer, a double-layer hot melt adhesive structure and a release layer;
the double-layer hot melt adhesive structure comprises a first hot melt adhesive layer and a second hot melt adhesive layer, the first hot melt adhesive layer is attached to one side face of the high polymer base material layer, and the second hot melt adhesive layer is attached to one side face, far away from the high polymer base material layer, of the first hot melt adhesive layer; the release layer is attached to one side surface, far away from the first hot melt adhesive layer, of the second hot melt adhesive layer;
the first hot melt adhesive layer is an SBC system hot melt pressure sensitive adhesive layer, and the second hot melt adhesive layer is a macromolecule butyl hot melt adhesive layer; both the first hot melt adhesive layer and the second hot melt adhesive layer are SBC system hot melt pressure sensitive adhesive layers; and the first hot melt adhesive layer and the second hot melt adhesive layer are both macromolecule butyl hot melt adhesive layers.
9. The double-layer co-extruded and coated hot melt adhesive waterproof roll according to claim 8, wherein the SBC system hot melt pressure sensitive adhesive comprises the following components in parts by mass: 5 to 20 portions of plasticizer, 15 to 30 portions of polyisobutylene, 20 to 50 portions of thermoplastic elastomer, 30 to 60 portions of tackifying resin and 0.1 to 1.0 portion of antioxidant.
10. The double-layer co-extrusion coating hot melt adhesive waterproof roll material as claimed in claim 8, wherein the high polymer butyl hot melt adhesive comprises the following components in parts by mass: 15 to 30 portions of butyl rubber, 5 to 15 portions of SEBS thermoplastic elastomer, 10 to 20 portions of hydrogenated rosin tackifying resin, 15 to 25 portions of terpene tackifying resin, 30 to 45 portions of rubber plasticizer, 0.5 to 1.5 portions of pigment and 0.5 to 1.0 portion of antioxidant.
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| CN111732907A (en) * | 2020-07-21 | 2020-10-02 | 重庆大禹防水科技发展有限公司 | Low-temperature pre-paved wet-paved waterproof coiled material, preparation method and construction process thereof |
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| CN104175667A (en) * | 2014-08-13 | 2014-12-03 | 青岛科化高分子科技股份有限公司 | Production process of polymer self-adhesion waterproof coiled material |
| CN110397222A (en) * | 2019-07-18 | 2019-11-01 | 广东能辉新材料科技有限公司 | Composite roof waterproof roll and preparation method thereof |
| CN212174859U (en) * | 2019-11-14 | 2020-12-18 | 广东能辉新材料科技有限公司 | Double-layer co-extrusion coating hot melt adhesive waterproof coiled material |
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| CN110397222A (en) * | 2019-07-18 | 2019-11-01 | 广东能辉新材料科技有限公司 | Composite roof waterproof roll and preparation method thereof |
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