CN117416079A - Preparation method and system of waterproof composite film - Google Patents
Preparation method and system of waterproof composite film Download PDFInfo
- Publication number
- CN117416079A CN117416079A CN202311733092.XA CN202311733092A CN117416079A CN 117416079 A CN117416079 A CN 117416079A CN 202311733092 A CN202311733092 A CN 202311733092A CN 117416079 A CN117416079 A CN 117416079A
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- Prior art keywords
- roller
- waterproof
- base cloth
- driving roller
- composite layer
- Prior art date
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- Granted
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- 239000002131 composite material Substances 0.000 title claims abstract description 122
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000004744 fabric Substances 0.000 claims abstract description 85
- 239000003292 glue Substances 0.000 claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 18
- 238000003892 spreading Methods 0.000 claims abstract description 17
- 230000007480 spreading Effects 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 239000004831 Hot glue Substances 0.000 claims description 22
- 238000004026 adhesive bonding Methods 0.000 claims description 17
- -1 polypropylene Polymers 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 3
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 63
- 239000012790 adhesive layer Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a preparation method and a preparation system of a waterproof composite film, and relates to the technical field of composite materials, wherein one end of an upper base cloth of the preparation system, which extends out of a first unreeling shaft, and one end of a waterproof functional film, which extends out of a second unreeling shaft, are respectively passed through a first gap between a first compression roller and a first transmission roller to obtain a first composite layer; the first glue spreading roller spreads glue between the upper base cloth and the waterproof functional film; the first press roller is positioned right above the first driving roller; the first unreeling shaft is positioned above the second unreeling shaft; the first composite layer passes through a second gap between the second pressing roller and the second driving roller after winding around the second driving roller, and the lower base cloth extends out of one end of the third unreeling shaft and passes through the second gap, so that the first composite layer is attached to the lower base cloth to obtain a waterproof composite film; the second glue spreading roller is used for spreading glue between the first composite layer and the lower base fabric; the second press roller is positioned right above the second driving roller; the winding shaft is used for winding the waterproof composite film. The preparation system provided by the invention can be used for integrally forming and preparing the waterproof composite film.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a preparation method and a system of a waterproof composite film.
Background
When the composite film with the three-layer structure is prepared in the prior art, hot melt adhesive is generally roll-coated on a functional film, then the functional film is transferred and pressed with base cloth through a pressing roller, and the film is rolled off and cured after being taken off to finish the first composite; and repeating the steps to complete the compounding of the other layer of base cloth and the functional film. However, the preparation method has the problems of long flow, complex process, low production efficiency, higher quality control difficulty and high production cost.
Disclosure of Invention
The embodiment of the invention provides a preparation method and a system for a waterproof composite film, which can be used for integrally forming and preparing the waterproof composite film based on the preparation system, are flexible to operate and improve the production efficiency and economic benefit.
In a first aspect, the present invention provides a preparation system of a waterproof composite film, the preparation system including a first unreeling shaft, a second unreeling shaft, a third unreeling shaft, a first glue spreader, a second glue spreader, a first press roller, a second press roller, a first driving roller, a second driving roller, and a reeling shaft;
the first unreeling shaft is reeled with the base cloth, the second unreeling shaft is reeled with the waterproof functional film, and the third unreeling shaft is reeled with the base cloth;
one end of the upper base cloth, which extends out of the first unreeling shaft, and one end of the waterproof functional film, which extends out of the second unreeling shaft, pass through a first gap between the first press roller and the first driving roller, so that the upper base cloth is attached to the waterproof functional film, and a first composite layer is obtained; the first glue spreading roller is used for spreading glue between the upper base cloth and the waterproof functional film before passing through the first pressing roller; wherein the first press roller is positioned right above the first driving roller; the first unreeling shaft is positioned above the second unreeling shaft;
the first composite layer passes through a second gap between the second pressing roller and the second driving roller after winding the second driving roller, and the lower base cloth extends out of one end of the third unreeling shaft and passes through the second gap so that the first composite layer is attached to the lower base cloth to obtain the waterproof composite film; the second glue roller is used for gluing between the first composite layer and the lower base fabric before passing through the second compression roller; wherein the second press roller is positioned right above the second driving roller;
the winding shaft is used for winding the waterproof composite film.
Preferably, the wrap angle between the second driving roller and the first composite layer is greater than 180 degrees.
Preferably, the wrap angle between the second driving roller and the first composite layer is 225 degrees.
Preferably, the second press roll has a wrap angle of greater than 90 ° with the waterproof composite film.
Preferably, the distance between the circle centers of the first driving roller and the second driving roller is 50-100 cm.
Preferably, the temperature of the first glue spreader and the second glue spreader is 80-200 ℃, the pressure is 50-500N, and the linear speed is 5-30 m/min.
In a second aspect, the present invention also provides a method for preparing the waterproof composite film provided in the first aspect, the method comprising:
the waterproof functional film unreeled from the second unreeled shaft passes through the first gap together with the upper base cloth unreeled from the first unreeled shaft after being coated on one surface of the waterproof functional film by the first coating roller, so as to obtain the first composite layer;
the upper base cloth in the first composite layer is contacted with the second driving roller, and is glued on the other surface of the waterproof functional film through the second gluing roller before passing through the second gap, and then the glued first composite layer and the lower base cloth unreeled from the third unreeled shaft jointly pass through the second gap to obtain the waterproof composite film; the waterproof composite film sequentially comprises the upper base cloth, the waterproof functional film and the lower base cloth;
and the waterproof composite film is wound by the winding shaft.
Preferably, the upper base fabric and the lower base fabric are both waterproof treated fabrics; the fabric is a non-woven fabric or woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber and carbon fiber.
Preferably, the waterproof functional film is prepared from at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer and polyethylene terephthalate.
Preferably, the waterproof functional film has a thickness of 10-200 μm and an areal density of 5-150 g/m 2 。
Preferably, the glue is hot melt glue; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive and PUR hot melt adhesive.
Preferably, the thickness of the glue is 1-50 mu m, and the glue coating amount is 5-120 g/m 2 。
Preferably, the tension of the first composite layer between the first driving roller and the second driving roller is controlled and determined according to the rotation speed of the first driving roller, the rotation speed of the second driving roller and the pressure of the first pressing roller;
the tension is calculated by the following formula:
wherein,Tfor characterizing the tension;E min for characterizing the minimum modulus of elasticity in the upper base fabric and the waterproof functional film;Afor characterizing the cross-sectional area of the first composite layer;ν 1 for characterizing the rotational speed of the first driving roller;ν 2 for characterizing the rotational speed of the second driving roller;Lfor characterizing the length of the first composite layer at run time;μfor characterizing loss coefficients;Nfor characterizing the pressure of the first press roll;θthe first composite layer is used for representing an included angle between the first composite layer and a horizontal plane in operation;L 1 for characterizing intermediate variables;L 0 for characterizing the distance between the centers of the circles of the first and second driving rollers;r 1 for characterizing a radius of the first driving roller;r 2 for characterizing the radius of the second driving roller; wherein,ν 2 ＞ν 1 。
compared with the prior art, the invention has at least the following beneficial effects:
the invention provides a waterproof composite film preparation system, which integrally combines an upper layer of base cloth, a lower layer of base cloth and a middle waterproof functional film through a roll coating transfer process, and adopts a mode of twice roll coating transfer and lamination for compounding.
The waterproof composite film prepared by the invention is formed by compositing an upper base cloth, an upper adhesive layer, a waterproof functional film, a lower adhesive layer and a lower base cloth from top to bottom, wherein the upper adhesive layer and the lower adhesive layer are hot melt adhesives, and the waterproof composite film has the characteristics of high strength, high toughness, good waterproof performance and weather resistance and the like, and is particularly suitable for the airtight treatment of the gap parts of peripheral protective structures of ultralow-energy buildings, near-zero-energy buildings, low-carbon buildings and zero-carbon buildings.
Drawings
Fig. 1 is a schematic structural diagram of a waterproof composite membrane preparation system according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a waterproof composite membrane according to an embodiment of the present invention;
in the figure: 10-a first unreeling shaft; 20-a second unreeling shaft; 30-a third unreeling shaft; 40-a first glue applicator; 50-a second glue applicator; 11-a first press roll; 12-a second press roll; 13-a first driving roller; 14-a second driving roller; 60-a take-up shaft;
201-upper base fabric; 202-an upper adhesive layer; 203-a waterproof functional film; 204-a lower adhesive layer; 205-lower base fabric.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
The embodiment of the invention provides a preparation system of a waterproof composite film, as shown in fig. 1 and 2, the preparation system comprises a first unreeling shaft 10, a second unreeling shaft 20, a third unreeling shaft 30, a first gluing roller 40, a second gluing roller 50, a first pressing roller 11, a second pressing roller 12, a first driving roller 13, a second driving roller 14 and a reeling shaft 60;
the first unreeling shaft 10 is reeled with the base cloth 201, the second unreeling shaft 20 is reeled with the waterproof functional film 203, and the third unreeling shaft 30 is reeled with the base cloth 205;
one end of the upper base cloth extending out of the first unreeling shaft 10 and one end of the waterproof functional film extending out of the second unreeling shaft 20 pass through a first gap between the first press roller 11 and the first driving roller 13, so that the upper base cloth is attached to the waterproof functional film to obtain a first composite layer; the first glue roll 40 is used for gluing between the upper base fabric and the waterproof functional film before passing through the first press roll 11; wherein the first press roller 11 is positioned right above the first driving roller 13; the first unwind spool 10 is located above the second unwind spool 20;
the first composite layer passes through a second gap between the second pressing roller 12 and the second driving roller 14 after winding the second driving roller 14, and the lower base cloth extends out of one end of the third unreeling shaft 30 and passes through the second gap, so that the first composite layer is attached to the lower base cloth to obtain a waterproof composite film; the second glue roll 50 is used to glue between the first composite layer and the lower base fabric before passing through the second press roll 12; wherein the second press roller 12 is positioned right above the second driving roller 14;
the take-up reel 60 is used for taking up the waterproof composite film.
The waterproof composite film prepared based on the waterproof composite film preparation system shown in fig. 1 is shown in fig. 2, and the waterproof composite film is composed of an upper base cloth 201, an upper adhesive layer 202, a waterproof functional film 203, a lower adhesive layer 204 and a lower base cloth 205 from top to bottom.
In the embodiment of the present invention, as shown in fig. 1, the first unreeling shaft 10 and the second unreeling shaft 20 are both positioned on the left side of the first driving roller 13; the winding shaft 60 is located above the third unwinding shaft 30, and the winding shaft 60 and the third unwinding shaft 30 are both located on the right of the second driving roller 14.
The first gap is a nip formed between the first press roller 11 and the first driving roller 13, and when passing through the first gap, the upper base cloth is located above the waterproof functional film; the second gap is a nip formed between the second press roller 12 and the second driving roller 14, wherein the first composite layer passes through the second gap with the lower side of the second driving roller 14 as a cut, so that when passing through the second gap, the lower base cloth is positioned above the first composite layer, and the lower base cloth is ensured to be in contact with the waterproof functional film, so that the waterproof composite film with a three-layer structure is obtained.
According to some preferred embodiments, the wrap angle between the second driven roller 14 and the first composite layer is greater than 180 ° (e.g., may be 185 °, 190 °, 200 °, 210 °, 220 °, 230 °, 240 °, 250 °, etc.).
Specifically, the first composite layer passes through the second gap with the lower part of the second driving roller 14 as a cut, and when the peripheral angle between the second driving roller 14 and the first composite layer is greater than 180 degrees, that is, the position of the highest point of the first driving roller 13 is higher than the position of the lowest point of the second driving roller 14 on the vertical distance.
In the embodiment of the invention, in order to enable the upper base cloth of the first composite layer and the waterproof functional film to be fully attached, the surrounding angle between the second driving roller and the first composite layer is further set to be larger than 180 degrees, so that the first composite layer keeps a certain inclination angle when running between the first driving roller and the second driving roller, attachment between the two layers is facilitated, meanwhile, the tension consistency is good, traction is smoother, and the first composite layer can be tightly attached to the second driving roller when passing through a second gap from the lower part of the second driving roller.
According to some more preferred embodiments, the wrap angle between the second driven roller 14 and the first composite layer is 225 °.
In the embodiment of the invention, when the wrap angle between the second driving roller and the first composite layer is 225 DEG, the first composite layer forms an included angle with the horizontal plane during operationθ45 degrees, on one hand, the first composite layer is favorable for coating the second driving roller; on the other hand, the upper and lower angles between the first composite layer and the first driving roller and between the first composite layer and the second driving roller are symmetrical, tension fluctuation is not easy to occur, and the operation is more stable.
According to some preferred embodiments, the second press roll 12 has a wrap angle with the waterproofing composite film of greater than 90 ° (e.g., may be 95 °, 100 °, 105 °, 110 °, 115 °, 120 °, etc.).
In the embodiment of the invention, in order to further ensure that the first composite layer is fully and tightly attached to the lower base fabric and is wound on the winding shaft, the second compression roller and the waterproof composite film are arranged to have a surrounding angle of more than 90 degrees.
According to some preferred embodiments, the distance between the centers of the circles of the first driving roller 13 and the second driving roller 14 is 50-100 cm (for example, may be 50cm, 55cm, 60cm, 65cm, 70cm, 75cm, 80cm, 85cm, 90cm, 95cm or 100 cm).
In the embodiment of the invention, the first composite layer is smoothly pulled to the second driving roller under the action of tension within a certain distance range by limiting the distance between the circle centers of the first driving roller and the second driving roller to be 50-100 cm; meanwhile, in order to improve the laminating effect of the first composite layer, the distance is designed to be not less than 50cm, so that the first composite layer just coated with the hot melt adhesive has an adhesive self-wetting process before entering the next roller, the laminating effect is improved, and when the distance is not less than 50cm, the coating effect and tension control of the first composite layer on the second driving roller are also affected. When the distance exceeds 100cm, space is wasted and the production period is increased.
According to some preferred embodiments, the temperatures of the first glue roll 40 and the second glue roll 50 are 80-200 ℃ (for example, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃ or 200 ℃), the pressures are 50-500N (for example, 50N, 55N, 60N, 65N, 70N, 80N, 90N, 100N, 110N, 120N, 150N, 200N, 250N, 300N, 350N, 400N, 450N or 500N), and the linear speeds are 5-30 m/min (for example, 5m/min, 10m/min, 15m/min, 20m/min, 25m/min or 30 m/min).
In the embodiment of the invention, in the two gluing processes, the temperature ranges of the first gluing roller and the second gluing roller are limited to 80-200 ℃, so that the problem that the hot melt adhesive is easy to solidify due to the too low temperature and the problem that the hot melt adhesive is easy to generate bubbles due to the too high temperature are avoided; meanwhile, the pressure ranges of the first glue spreader and the second glue spreader are limited to 50-500N, so that the situation that the bonding of the waterproof functional film and the upper base cloth or the bonding of the first composite layer and the lower base cloth is not facilitated when the pressure is too low is avoided, and the damage caused by the increase of running resistance when the pressure is too high is avoided; and secondly, limiting the linear speeds of the first glue spreading roller and the second glue spreading roller to be 5-30 m/min so as to avoid the influence of the low linear speed on the productivity and avoid the difficulty in controlling the uniform glue spreading amount due to the high linear speed.
It should be noted that, the first glue spreader 40 and the second glue spreader 50 can control the glue amount by automatically adjusting the gap between the glue scraping plate and the waterproof functional film, and the glue amounts of the two glue coated surfaces of the waterproof functional film can be different; the gluing modes of the two sides of the waterproof functional film include, but are not limited to, full-spread, dot-shaped and bar-shaped.
The invention also provides a preparation method of the waterproof composite film, which comprises the following steps:
the waterproof functional film unreeled from the second unreeled shaft passes through a first gap together with the upper base cloth unreeled from the first unreeled shaft after being coated on one surface of the waterproof functional film by a first coating roller to obtain a first composite layer;
the upper base cloth in the first composite layer is contacted with the second driving roller, and is glued on the other surface of the waterproof functional film through the second gluing roller before passing through the second gap, and then the glued first composite layer and the lower base cloth unreeled from the third unreeled shaft pass through the second gap together to obtain the waterproof composite film; the waterproof composite film sequentially comprises an upper base cloth, a waterproof functional film and a lower base cloth;
the waterproof composite film is wound by a winding shaft.
According to some preferred embodiments, the upper base fabric and the lower base fabric are both water-repellent treated fabrics; the fabric is a non-woven fabric or woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber and carbon fiber.
At least one kind is a mixture of any one or any plurality of kinds mixed in any proportion. The materials of the upper base cloth and the lower base cloth can be the same or different.
According to some preferred embodiments, the waterproof functional film is prepared from at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer, polyethylene terephthalate.
According to some preferred embodiments, the waterproof functional film has a thickness of 10 to 200 μm (for example, 10 μm, 15 μm, 20 μm, 30 μm, 50 μm, 60 μm, 80 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm) and an areal density of 5 to 150g/m 2 (e.g., may be 5 g/m) 2 、5.5g/m 2 、6g/m 2 、8g/m 2 、10g/m 2 、12g/m 2 、15g/m 2 、20g/m 2 、30g/m 2 、40g/m 2 、50g/m 2 、60g/m 2 、70g/m 2 、80g/m 2 、90g/m 2 、100g/m 2 、110g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 Or 150g/m 2 ）。
According to some preferred embodiments, the glue application is a hot melt glue; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive and PUR hot melt adhesive.
According to some preferred embodiments, the glue has a thickness of 1 to 50 μm (e.g., 1 μm, 1.5 μm, 2 μm, 3 μm, 5 μm, 6 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm) and a glue amount of 5 to 120g/m 2 (e.g., may be 5 g/m) 2 、5.5g/m 2 、7g/m 2 、9g/m 2 、11g/m 2 、16g/m 2 、18g/m 2 、20g/m 2 、30g/m 2 、40g/m 2 、50g/m 2 、60g/m 2 、70g/m 2 、80g/m 2 、90g/m 2 、100g/m 2 、110g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 Or 150g/m 2 ）。
According to some preferred embodiments, the tension to which the first composite layer is subjected between the first driving roller and the second driving roller is controlled and determined according to the rotation speed of the first driving roller, the rotation speed of the second driving roller and the pressure of the first pressing roller;
the tension is calculated by the following formula:
wherein,Tfor characterizing tension;E min for characterizing the minimum elastic modulus in the upper base fabric and the waterproof functional film;Afor characterizing the cross-sectional area of the first composite layer;ν 1 the rotating speed is used for representing the rotating speed of the first driving roller;ν 2 the rotating speed is used for representing the rotating speed of the second driving roller;Lfor characterizing the length of the first composite layer at run time;μfor characterizing loss coefficients;Nfor characterizing the pressure of the first press roll;θthe method comprises the steps of representing an included angle between a first composite layer and a horizontal plane during operation;L 1 for characterizing intermediate variables;L 0 used for representing the distance between the circle centers of the first driving roller and the second driving roller,L 0 =50~100cm；r 1 for characterizing the radius of the first driving roller;r 2 for characterizing the radius of the second driving roller; wherein,ν 2 ＞ν 1 。
it should be noted that the number of the substrates,E min and taking the minimum value of the elastic modulus of the upper base fabric and the elastic modulus of the waterproof functional film.μ= μ 1 +μ 2 ，μ 1 Is the friction factor between the upper base cloth and the first press roller and the friction factor between the waterproof functional film and the first driving roller,μ 2 is the coefficient of influence of the hot melt adhesive on the first composite layer passing through the first interval.tFor characterizing the time from the first driven roller exiting to the second driven roller for the first composite layer;Lfor characterizing the length of the first composite layer between the first driven roller and the second driven roller.θThe wrap angle between the second driving roller and the first composite layer is-180 degrees.
In the invention, the control of the tension received by the first composite layer can be realized by determining the rotation speed of the first driving roller, the rotation speed of the second driving roller and the pressure of the first compression roller, so that the rotation speed of the first driving roller, the rotation speed of the second driving roller and the pressure of the first compression roller are regulated in real time to control the tensioning degree of the first composite layer to maintain constant tension.
In order to more clearly illustrate the technical scheme and advantages of the invention, a method and a system for preparing the waterproof composite film are described in detail through the following embodiments.
Examples
The upper base cloth and the lower base cloth are made of polyethylene terephthalate fiber non-woven fabrics, the thickness is 0.55mm, and the surface density is 60g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The waterproof functional film adopts polyethylene with the thickness of 40 mu m and the areal density of 50g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the EVA hot melt adhesives are adopted as the hot melt adhesives;
with the manufacturing system shown in fig. 1, the wrap angle between the second driving roller 14 and the first composite layer is 225 degrees, and the first composite layer forms an included angle with the horizontal plane during operationθ45 °; the surrounding angle of the second press roll 12 and the waterproof composite film is larger than 90 degrees, the distance between the circle centers of the first driving roll 13 and the second driving roll 14 is 100cm, and the method for preparing the waterproof composite film by adopting the preparation system comprises the following steps:
(1) Setting the temperature of the first glue applicator 40 to 100 ℃ and the pressure to 200N, fully spreading the hot melt adhesive on one surface of the waterproof functional film discharged from the second unreeling shaft through the first glue applicator 40, wherein the glue coating thickness is 12 mu m, and the glue coating amount is 70g/m 2 The linear speed is 10m/min, and then the surface and the upper base cloth enter a first press roller 11 together for press fit under the action of a first driving roller 13 to obtain a first composite layer;
(2) The first composite layer passes through a second gap between the second press roller 12 and the second driving roller 14 by taking the lower part of the second driving roller 14 as a cutting opening;
(3) Setting the temperature of the second glue spreading roller 50 to be 100 ℃ and the pressure to be 200N, spreading the hot melt glue on the other surface of the waterproof functional film through the second glue spreading roller 50, wherein the glue spreading thickness is 12 mu m, and the glue spreading amount is 70g/m 2 The linear speed is 10m/min, then the surface and the lower base cloth enter the second press roller 12 together for pressing under the action of the second driving roller 14, and finally, a three-layer waterproof composite film is obtained;
(4) Winding the waterproof composite film by adopting a winding shaft 60; wherein the content of the hot melt adhesive in the prepared waterproof composite film is 140g/m 2 An areal density of 310g/m 2 。
In the process of gluing by the first gluing roller and the second gluing roller, the material characteristics of the upper base cloth and the lower base cloth cannot be changed because the pressure roller is at normal temperature in the pressurizing process of the first pressing roller and the second pressing roller.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention. The invention is not described in detail in a manner known to those skilled in the art.
Claims (10)
1. The preparation system of the waterproof composite film is characterized by comprising a first unreeling shaft, a second unreeling shaft, a third unreeling shaft, a first gluing roller, a second gluing roller, a first compression roller, a second compression roller, a first driving roller, a second driving roller and a reeling shaft;
the first unreeling shaft is reeled with the base cloth, the second unreeling shaft is reeled with the waterproof functional film, and the third unreeling shaft is reeled with the base cloth;
one end of the upper base cloth, which extends out of the first unreeling shaft, and one end of the waterproof functional film, which extends out of the second unreeling shaft, pass through a first gap between the first press roller and the first driving roller, so that the upper base cloth is attached to the waterproof functional film, and a first composite layer is obtained; the first glue spreading roller is used for spreading glue between the upper base cloth and the waterproof functional film before passing through the first pressing roller; wherein the first press roller is positioned right above the first driving roller; the first unreeling shaft is positioned above the second unreeling shaft;
the first composite layer passes through a second gap between the second pressing roller and the second driving roller after winding the second driving roller, and the lower base cloth extends out of one end of the third unreeling shaft and passes through the second gap so that the first composite layer is attached to the lower base cloth to obtain the waterproof composite film; the second glue roller is used for gluing between the first composite layer and the lower base fabric before passing through the second compression roller; wherein the second press roller is positioned right above the second driving roller;
the winding shaft is used for winding the waterproof composite film.
2. The manufacturing system of claim 1, wherein a wrap angle between the second driven roller and the first composite layer is greater than 180 °.
3. The manufacturing system of claim 1, wherein the second driven roller has a wrap angle of 225 ° with the first composite layer.
4. The manufacturing system of claim 1, wherein the second press roll has a wrap angle with the waterproof composite film of greater than 90 °.
5. The manufacturing system of claim 1, wherein a distance between centers of the first driving roller and the second driving roller is 50-100 cm.
6. The manufacturing system of claim 1, wherein the first glue spreader and the second glue spreader are both at a temperature of 80-200 ℃, a pressure of 50-500 n, and a linear velocity of 5-30 m/min.
7. A method for producing a waterproof composite film, characterized by using the production system according to any one of claims 1 to 6, comprising:
the waterproof functional film unreeled from the second unreeled shaft passes through the first gap together with the upper base cloth unreeled from the first unreeled shaft after being coated on one surface of the waterproof functional film by the first coating roller, so as to obtain the first composite layer;
the upper base cloth in the first composite layer is contacted with the second driving roller, and is glued on the other surface of the waterproof functional film through the second gluing roller before passing through the second gap, and then the glued first composite layer and the lower base cloth unreeled from the third unreeled shaft jointly pass through the second gap to obtain the waterproof composite film; the waterproof composite film sequentially comprises the upper base cloth, the waterproof functional film and the lower base cloth;
and the waterproof composite film is wound by the winding shaft.
8. The method according to claim 7, wherein,
the upper base cloth and the lower base cloth are both fabrics subjected to waterproof treatment; the fabric is a non-woven fabric or woven fabric prepared from at least one of polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, polyethylene terephthalate fiber, aromatic polyamide fiber, glass fiber and carbon fiber.
9. The method according to claim 7, wherein,
the waterproof functional film is prepared from at least one of polyethylene, thermoplastic polyurethane elastomer rubber, polyvinyl chloride, polytetrafluoroethylene, ethylene-vinyl acetate copolymer and polyethylene terephthalate; and/or the number of the groups of groups,
the thickness of the waterproof functional film is 10-200 mu m, and the surface density is 5-150 g/m 2 。
10. The method according to any one of claims 7 to 9, wherein,
the glue spreading adopts hot melt glue; the hot melt adhesive is at least one of EVA hot melt adhesive, PO hot melt adhesive and PUR hot melt adhesive; and/or the number of the groups of groups,
the thickness of the glue is 1-50 mu m, and the glue coating amount is 5-120 g/m 2 。
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