CN113187987A - Air cushion heat insulation anti-convection layer and preparation method thereof - Google Patents

Air cushion heat insulation anti-convection layer and preparation method thereof Download PDF

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Publication number
CN113187987A
CN113187987A CN202110513876.6A CN202110513876A CN113187987A CN 113187987 A CN113187987 A CN 113187987A CN 202110513876 A CN202110513876 A CN 202110513876A CN 113187987 A CN113187987 A CN 113187987A
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China
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layer
air cushion
aluminum foil
film
polyethylene
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CN202110513876.6A
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Chinese (zh)
Inventor
王国兴
是金芳
温成
周建忠
薛瑞方
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Nanjing Suxia Design Group Co ltd
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Nanjing Suxia Design Group Co ltd
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Priority to CN202110513876.6A priority Critical patent/CN113187987A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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    • 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
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/08—Means for preventing radiation, e.g. with metal foil
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
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    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
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    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention discloses an air cushion heat insulation anti-convection layer, which comprises an aluminum foil reflecting layer I, a polyethylene bubble film layer II, a polyethylene bubble film layer III and an aluminum foil reflecting layer II from inside to outside; the aluminum foil reflecting layer I or the aluminum foil reflecting layer II comprises an aluminum foil, a polyethylene terephthalate film and a chlorinated polyethylene film, the outermost layer from outside to inside is the aluminum foil, the second layer is the polyethylene terephthalate film, and the innermost layer is the chlorinated polyethylene film. The air cushion heat insulation anti-convection layer disclosed by the invention has the advantages of good moisture resistance and water resistance, good impact resistance and long service life, and when heat contacts the aluminum foil reflecting layer, the heat radiation absorption is small due to high reflectivity, and the heat transmitted by the middle air layer is also small, so that the heat conduction, radiation and convection heat dissipation of a heat supply network pipeline can be effectively solved, and the air cushion heat insulation anti-convection layer has a good heat insulation effect.

Description

Air cushion heat insulation anti-convection layer and preparation method thereof
Technical Field
The invention belongs to the technical field of steam heating power pipeline heat preservation, and particularly relates to an air cushion heat insulation antistream layer and a preparation method thereof.
Background
At present, the heat insulation materials used in the domestic heat supply network industry generally have the problems of poor heat insulation and heat insulation performance, short service life and the like, and according to calculation, the heat supply network conveying efficiency in China is only about 67%, and is far away from the requirement of the national energy-saving standard of 90%, and the pipe network conveying efficiency is low. The heat loss of the heat supply network is mainly caused by the fact that heat preservation engineering measures are not in place, and if heat preservation and heat insulation measures are adopted for thermal equipment and thermal pipelines, the heat loss can be reduced by 80% -90%. On the contrary, if the pipeline is not insulated, the fluid can exchange heat with the outside continuously in the conveying process, so that heat loss is caused. Meanwhile, the condensation phenomenon can occur in the pipeline, the service life of the pipeline is influenced, the utilization rate of equipment is reduced, and the safety of workers is threatened. The air cushion heat insulation anti-convection layer is an essential important part in heat supply network pipeline engineering, and can avoid the problems of overlarge heat loss, large energy consumption and the like in the long-distance conveying process of a heat supply network.
However, the air cushion heat insulation objection flow layer structure in the prior art is simple, the heat preservation effect is not good, the function is single, the air cushion heat insulation objection flow layer with the novel structure needs to be developed by taking measures urgently, and the heat preservation effect of the existing heat preservation layer structure is improved. In addition, the process for producing the air cushion heat-insulating anti-convection layer is not complete, and particularly, the adhesion speed of the aluminum foil reflecting layer and the polyethylene film is low, so that the production speed of a product is influenced, the production yield is low, the period is long, and the cost is high; meanwhile, the existing production device has no waste recovery process, so that material waste and environmental pollution are caused, and the process for producing the air cushion heat insulation anti-convection layer seriously restricts the development of enterprises.
Disclosure of Invention
The invention provides an air cushion heat insulation anti-convection layer and a preparation method thereof, and aims to solve the problems that in the prior art, the heat insulation effect of the air cushion heat insulation anti-convection layer is not obvious, the impact resistance and the water resistance are high, the service life is not ideal, the process flow is incomplete and the construction is inconvenient.
In order to achieve the purpose, the invention adopts the following technical scheme:
an air cushion heat insulation anti-convection layer comprises an aluminum foil reflecting layer I1, a polyethylene bubble film layer I2, a polyethylene bubble film layer II3, a polyethylene bubble film layer III4 and an aluminum foil reflecting layer II5 from inside to outside; the aluminum foil reflecting layer I1 and the aluminum foil reflecting layer II5 are aluminum foil reflecting layers, and the aluminum foil reflecting layers are an aluminum foil 101, a polyethylene terephthalate film 102 and a chlorinated polyethylene film 103 in sequence from outside to inside; the aluminum foil 101 and the polyethylene terephthalate film 102, and the polyethylene terephthalate film 102 and the chlorinated polyethylene film 103 are bonded by flame retardant adhesive layers 104.
The thickness of the aluminum foil 101 is 6.5-7 mu m, the thickness of the polyethylene terephthalate film 102 is 12 mu m, the thickness of the chlorinated polyethylene film 103 is 24 mu m, and the thickness of the aluminum foil reflecting layer is 45 mu m.
The flame-retardant adhesive layer 104 is a mixture of polyurethane adhesive and industrial pure ethyl acetate, and the mass concentration ratio of the polyurethane adhesive to the industrial pure ethyl acetate is 1: 1.5.
The polyethylene bubble film layer I2, the polyethylene bubble film layer II3 and the polyethylene bubble film layer III4 are all polyethylene bubble film layers; the polyethylene bubble film layer is a mixture of low-density polyethylene LDPE and antimony pentoxide flame retardant, wherein: the mass content of the antimony pentoxide flame retardant is 5% -8%, and the diameter of the bubbles 37 on the polyethylene bubble film layer is 18-20 mm.
A preparation method of an air cushion heat insulation anti-convection layer comprises the following steps:
s1, preparing an aluminum foil reflecting layer:
s101, glue preparation: the mass concentration ratio of the polyurethane glue to the ethyl acetate solvent is 1:1.5, the polyurethane glue is poured into a glue blending barrel 9, and then the ethyl acetate solvent is stirred while being added for dilution;
s102, winding and penetrating a film: respectively placing an aluminum foil 101, a polyethylene terephthalate film 102 and a chlorinated polyethylene film 103 which need to be glued on a unreeling shaft I6, a unreeling shaft II7 and a unreeling shaft III8, and adjusting the tension of each unreeling shaft to ensure that the aluminum foil 101, the polyethylene terephthalate film 102 and the chlorinated polyethylene film 103 are stably and smoothly unreeled through a guide roller 10;
s103, gluing: adjusting the air pressure of a rotating arm of the compound machine, the air pressure of a scraper and the air pressure of a rubber pressing roller 11 to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in a glue preparation barrel 9 on the surface of the aluminum foil 101;
s104, drying: starting a heating system of the drying oven 13, controlling the temperature of the drying oven 13 to be between 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued aluminum foil 101 passes through a drying tunnel;
s105, compounding: adjusting the composite air pressure to 0.4-0.7 MPa, the temperature of the composite roller 12 to 60-80 ℃, and thermally bonding the aluminum foil 101 and the polyethylene terephthalate film 102 under the pressurizing and heating conditions to obtain a composite film 14;
s106, gluing: adjusting the air pressure of a rotating arm, a scraper and a rubber pressing roller 11 of the compound machine to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in the glue preparation barrel 9 on the surface of a polyethylene glycol terephthalate film 102 of the composite film 14;
s107, drying again: and starting a heating system of the oven 13, controlling the temperature of the oven 13 to be 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued composite film 14 passes through the drying tunnel.
S108, recombination: adjusting the composite air pressure to be 0.4-0.7 MPa, the temperature of the composite roller 12 to be 60-80 ℃, and thermally laminating the composite film 14 and the chlorinated polyethylene film 103 under the pressurizing and heating conditions to obtain an aluminum foil reflecting layer I1;
s109, cooling and rolling: after the aluminum foil reflecting layer I1 is cooled by a cooling roller 15 at room temperature, a paper core is placed, the winding tension is adjusted to be 400-900N and is 100N greater than the unwinding tension, winding is carried out, and when the winding length of the aluminum foil reflecting layer I1 reaches 2000m, a cutter is started to cut off a membrane material;
s110, curing: placing the compounded aluminum foil reflecting layer I1 into a curing chamber for curing, wherein the curing temperature is set to be 40-55 ℃, and the curing time is 24-50 h;
s2, preparing a polyethylene bubble film layer:
s201, preparing materials: feeding low-density polyethylene LDPE through a feeding system 16, adding antimony pentoxide into a mixing system 17, wherein the mass content of flame retardant antimony pentoxide is 5-8%, and mixing and melting raw materials in the mixing system 17;
s202, melting: mixing and melting low-density polyethylene LDPE and antimony pentoxide, wherein: the temperature of the feeding section is controlled to be 130-150 ℃, the temperature of the plasticizing section is controlled to be 170-190 ℃, and the temperature of the homogenizing section is controlled to be 200-220 ℃.
S203, extruding the die: the low-density polyethylene LDPE and antimony pentoxide molten material are molded by a flat die 19 on an extruder 18;
s204, plastic film forming: melting the formed low-density polyethylene LDPE and antimony pentoxide, and forming a bubble film through a die head 20 by plastic suction, namely successfully preparing a polyethylene bubble layer; in the preparation process of the air bubble layer, the temperature of a die head 20 is controlled to be 160-180 ℃, and the vacuum degree is controlled to be 0.04 MPa;
s3, preparing an air cushion heat insulation anti-convection layer:
s301, pressing: under the action of the first air cushion forming roller 22 and the die head 20, the polyethylene bubble film layer I2 and the aluminum foil reflecting layer I1 are subjected to hot-pressing compounding on line to obtain a first single-layer air cushion layer 25; under the action of the second air cushion forming roller 24 and the die head 20, the polyethylene bubble film layer III4 and the aluminum foil reflecting layer II5 are subjected to hot-pressing compounding on line to obtain a second single-layer air cushion layer 26;
s302, extrusion: pressing the first single-layer air cushion layer 25 and the second single-layer air cushion layer 26 by a first single-layer air cushion rolling roller 27 and a second single-layer air cushion rolling roller 28 respectively to finally prepare the air cushion heat insulation anti-convection layer 35 composite material;
s303, rolling: and cutting off the air cushion ear material 36 from the prepared air cushion heat insulation anti-convection layer 35 composite material above the ear material recovery roller 30, and winding the composite material on a winding roller 34 through a gap between a finished product air cushion guide roller 31 and a finished product air cushion rolling roller 32.
Feed system 16 includes storage vat 1601, auto sucking machine 1604 and desiccator 1607, auto sucking machine 1604's top is provided with inlet scoop 1605, and inlet scoop 1605 is located the air exit 1606 that desiccator 1607 top set up through the pipe connection, be provided with on the lateral wall of desiccator 1607 upper segment and inhale material mouth 1603, inhale material mouth 1603 and connect the one end of inhaling material pipe 1602, inhale the other end of material pipe 1602 and stretch into in storage vat 1601, desiccator 1607 is connected with vacuum pump 1608, the bottom of desiccator 1607 is passed through melting pipe 1609 and is connected in mixing material system 17 top.
Low density polyethylene LDPE is equipped with in storage vat 1601, it has mould 19 to connect on the extruder 18, the discharge gate of mould 19 is facing to aluminium foil reflection stratum I1 between first air cushion forming roller 22 and the die head 20, or the discharge gate of mould 19 lower extreme is facing to aluminium foil reflection stratum II5 between second air cushion forming roller 24 and the die head 20, or the discharge gate of homogenization pipe 1710 lower extreme is facing to first individual layer air cushion layer 25 and second individual layer air cushion layer 26 between first individual layer air cushion rolling roller 27 and the second individual layer air cushion rolling roller 28.
The air cushion ear material 36 is recovered in the ear material recovery crusher 33, the ear material recovery crusher 33 is connected to the storage barrel 1601, the length of the air cushion ear material 36 crushed by the ear material recovery crusher 33 is 2-3 mm, and the particle size is 0.2-0.5 mm.
The thickness of the air cushion heat insulation anti-convection layer 35 is 6 +/-0.5 mm, and the gram weight is more than or equal to 360g/m2The temperature resistant range is-30 to 100 ℃.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the heat insulation effect is good. When heat contacts the aluminum foil reflecting layer, the heat radiation absorption is small due to high reflectivity of the aluminum foil reflecting layer, and the heat transmitted by the middle air layer is little, so that the conduction, radiation and convection heat dissipation of a heat supply network pipeline can be effectively solved, and the material has a good heat insulation effect.
Secondly, moisture-proof and waterproof performance and good impact resistance. The aluminum foil reflecting layer has compact surface, does not absorb moisture, can prevent moisture and water in a humid environment, and does not influence the use effect. The closed air bubbles are filled with air, so that when the whole air bubbles are subjected to external impact load, the energy can be converted into deformation energy by using the structure of the air bubble layer, the material is not damaged, and the buffering and shock-absorbing effects can be effectively achieved; meanwhile, the air bubble layer of the aluminum foil air bubble composite material is filled with air, the weight is light, the weight per square gram is about 250 grams, the density is low, and the service life is as long as about 15 years.
Third, the air cushion is thermal-insulated to object against the fluidized bed production rate fast, the high quality to do not need a large amount of hand labor, be equipped with ear material recovery unit simultaneously, resources are saved reduction in production cost when guaranteeing that the air cushion is thermal-insulated to object against the fluidized bed and tailors the effect.
Drawings
FIG. 1 is a diagram of a process for producing an aluminum foil reflecting layer according to the present invention;
FIG. 2 is a schematic view of the structure of the aluminum foil reflecting layer according to the present invention;
FIG. 3 is a schematic view of the construction of the air-cushion thermal insulation anti-convection layer of the present invention;
FIG. 4 is a polyethylene bubble film layer of the present invention
Figure DEST_PATH_IMAGE001
Or a polyethylene bubble film layer
Figure 703564DEST_PATH_IMAGE002
Or a polyethylene bubble film layer
Figure DEST_PATH_IMAGE003
Schematic structural diagram of (a);
FIG. 5 is a polyethylene bubble film layer of the present invention
Figure 986778DEST_PATH_IMAGE001
Or a polyethylene bubble film layer
Figure 809240DEST_PATH_IMAGE002
Or a polyethylene bubble film layer
Figure 76274DEST_PATH_IMAGE003
A cross-sectional view of;
FIG. 6 is a process diagram for producing an air-cushion heat-insulating anti-convection layer in the present invention;
FIG. 7 is a schematic view of a feed system of the present invention;
FIG. 8 is a schematic view of a partial production of the air-cushion insulation anti-convection layer of the present invention;
FIG. 9 is a schematic view of another aluminum foil reflecting layer according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1-8, an air cushion heat insulation anti-convection layer comprises, from inside to outside, an aluminum foil reflection layer I1, a polyethylene bubble film layer I2, a polyethylene bubble film layer II3, a polyethylene bubble film layer III4, and an aluminum foil reflection layer II 5; the aluminum foil reflecting layer I1 and the aluminum foil reflecting layer II5 are aluminum foil reflecting layers, and the aluminum foil reflecting layers are an aluminum foil 101, a polyethylene terephthalate film 102 and a chlorinated polyethylene film 103 in sequence from outside to inside; the aluminum foil 101 and the polyethylene terephthalate film 102, and the polyethylene terephthalate film 102 and the chlorinated polyethylene film 103 are bonded by flame retardant adhesive layers 104.
The thickness of the aluminum foil 101 is 6.5-7 mu m, the thickness of the polyethylene terephthalate film 102 is 12 mu m, the thickness of the chlorinated polyethylene film 103 is 24 mu m, and the thickness of the aluminum foil reflecting layer is 45 mu m.
The flame-retardant adhesive layer 104 is a mixture of polyurethane adhesive and industrial pure ethyl acetate, and the mass concentration ratio of the polyurethane adhesive to the industrial pure ethyl acetate is 1: 1.5.
The polyethylene bubble film layer I2, the polyethylene bubble film layer II3 and the polyethylene bubble film layer III4 are all polyethylene bubble film layers; the polyethylene bubble film layer is a mixture of low-density polyethylene LDPE and antimony pentoxide flame retardant, wherein: the mass content of the antimony pentoxide flame retardant is 5% -8%, and the diameter of the bubbles 37 on the polyethylene bubble film layer is 18-20 mm.
Example 2
A preparation method of an air cushion heat insulation anti-convection layer comprises the following steps:
s1, preparing an aluminum foil reflecting layer:
s101, glue preparation: the mass concentration ratio of the polyurethane glue to the ethyl acetate solvent is 1:1.5, the polyurethane glue is poured into a glue blending barrel 9, and then the ethyl acetate solvent is stirred while being added for dilution;
s102, winding and penetrating a film: respectively placing an aluminum foil 101, a polyethylene terephthalate film 102 and a chlorinated polyethylene film 103 which need to be glued on a unreeling shaft I6, a unreeling shaft II7 and a unreeling shaft III8, and adjusting the tension of each unreeling shaft to ensure that the aluminum foil 101, the polyethylene terephthalate film 102 and the chlorinated polyethylene film 103 are stably and smoothly unreeled through a guide roller 10;
s103, gluing: adjusting the air pressure of a rotating arm of the compound machine, the air pressure of a scraper and the air pressure of a rubber pressing roller 11 to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in a glue preparation barrel 9 on the surface of the aluminum foil 101;
s104, drying: starting a heating system of the drying oven 13, controlling the temperature of the drying oven 13 to be between 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued aluminum foil 101 passes through a drying tunnel;
s105, compounding: adjusting the composite air pressure to 0.4-0.7 MPa, the temperature of the composite roller 12 to 60-80 ℃, and thermally bonding the aluminum foil 101 and the polyethylene terephthalate film 102 under the pressurizing and heating conditions to obtain a composite film 14;
s106, gluing: adjusting the air pressure of a rotating arm, a scraper and a rubber pressing roller 11 of the compound machine to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in the glue preparation barrel 9 on the surface of a polyethylene glycol terephthalate film 102 of the composite film 14;
s107, drying again: and starting a heating system of the oven 13, controlling the temperature of the oven 13 to be 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued composite film 14 passes through the drying tunnel.
S108, recombination: adjusting the composite air pressure to be 0.4-0.7 MPa, the temperature of the composite roller 12 to be 60-80 ℃, and thermally laminating the composite film 14 and the chlorinated polyethylene film 103 under the pressurizing and heating conditions to obtain an aluminum foil reflecting layer I1;
s109, cooling and rolling: after the aluminum foil reflecting layer I1 is cooled by a cooling roller 15 at room temperature, a paper core is placed, the winding tension is adjusted to be 400-900N and is 100N greater than the unwinding tension, winding is carried out, and when the winding length of the aluminum foil reflecting layer I1 reaches 2000m, a cutter is started to cut off a membrane material;
s110, curing: placing the compounded aluminum foil reflecting layer I1 into a curing chamber for curing, wherein the curing temperature is set to be 40-55 ℃, and the curing time is 24-50 h;
s2, preparing a polyethylene bubble film layer:
s201, preparing materials: feeding low-density polyethylene LDPE through a feeding system 16, adding antimony pentoxide into a mixing system 17, wherein the mass content of flame retardant antimony pentoxide is 5-8%, and mixing and melting raw materials in the mixing system 17;
s202, melting: mixing and melting low-density polyethylene LDPE and antimony pentoxide, wherein: the temperature of the feeding section is controlled to be 130-150 ℃, the temperature of the plasticizing section is controlled to be 170-190 ℃, and the temperature of the homogenizing section is controlled to be 200-220 ℃.
S203, extruding the die: the low-density polyethylene LDPE and antimony pentoxide molten material are molded by a flat die 19 on an extruder 18;
s204, plastic film forming: melting the formed low-density polyethylene LDPE and antimony pentoxide, and forming a bubble film through a die head 20 by plastic suction, namely successfully preparing a polyethylene bubble layer; in the preparation process of the air bubble layer, the temperature of a die head 20 is controlled to be 160-180 ℃, and the vacuum degree is controlled to be 0.04 MPa;
s3, preparing an air cushion heat insulation anti-convection layer:
s301, pressing: under the action of the first air cushion forming roller 22 and the die head 20, the polyethylene bubble film layer I2 and the aluminum foil reflecting layer I1 are subjected to hot-pressing compounding on line to obtain a first single-layer air cushion layer 25; under the action of the second air cushion forming roller 24 and the die head 20, the polyethylene bubble film layer III4 and the aluminum foil reflecting layer II5 are subjected to hot-pressing compounding on line to obtain a second single-layer air cushion layer 26;
s302, extrusion: pressing the first single-layer air cushion layer 25 and the second single-layer air cushion layer 26 by a first single-layer air cushion rolling roller 27 and a second single-layer air cushion rolling roller 28 respectively to finally prepare the air cushion heat insulation anti-convection layer 35 composite material;
s303, rolling: and cutting off the air cushion ear material 36 from the prepared air cushion heat insulation anti-convection layer 35 composite material above the ear material recovery roller 30, and winding the composite material on a winding roller 34 through a gap between a finished product air cushion guide roller 31 and a finished product air cushion rolling roller 32.
Feed system 16 includes storage vat 1601, auto sucking machine 1604 and desiccator 1607, auto sucking machine 1604's top is provided with inlet scoop 1605, and inlet scoop 1605 is located the air exit 1606 that desiccator 1607 top set up through the pipe connection, be provided with on the lateral wall of desiccator 1607 upper segment and inhale material mouth 1603, inhale material mouth 1603 and connect the one end of inhaling material pipe 1602, inhale the other end of material pipe 1602 and stretch into in storage vat 1601, desiccator 1607 is connected with vacuum pump 1608, the bottom of desiccator 1607 is passed through melting pipe 1609 and is connected in mixing material system 17 top.
Low density polyethylene LDPE is equipped with in storage vat 1601, it has mould 19 to connect on the extruder 18, the discharge gate of mould 19 is facing to aluminium foil reflection stratum I1 between first air cushion forming roller 22 and the die head 20, or the discharge gate of mould 19 lower extreme is facing to aluminium foil reflection stratum II5 between second air cushion forming roller 24 and the die head 20, or the discharge gate of homogenization pipe 1710 lower extreme is facing to first individual layer air cushion layer 25 and second individual layer air cushion layer 26 between first individual layer air cushion rolling roller 27 and the second individual layer air cushion rolling roller 28.
The air cushion ear material 36 is recovered in the ear material recovery crusher 33, the ear material recovery crusher 33 is connected to the storage barrel 1601, the length of the air cushion ear material 36 crushed by the ear material recovery crusher 33 is 2-3 mm, and the particle size is 0.2-0.5 mm.
The thickness of the air cushion heat insulation anti-convection layer 35 is 6 +/-0.5 mm, and the gram weight is more than or equal to 360g/m2The temperature resistant range is-30 to 100 ℃.
In example 3, as shown in fig. 9, that is, in the structure of the aluminum foil reflection layer I1 or the aluminum foil reflection layer II5 in the prior art, the aluminum foil reflection layer I1 or the aluminum foil reflection layer II5 is a polyethylene terephthalate film 102, an aluminum foil 101, and a polyethylene chloride film 103 in this order from the outside to the inside, and the thermal conductivity of the aluminum foil reflection layer I1 or the aluminum foil reflection layer II5 is 0.0407W/m · K.
In example 4, as shown in fig. 2, the aluminum foil reflection layer I1 or the aluminum foil reflection layer II5 is, in order from the outside to the inside, an aluminum foil 101, a polyethylene terephthalate film 102, and a chlorinated polyethylene film 103, and the thermal conductivity coefficient of the aluminum foil reflection layer I1 or the aluminum foil reflection layer II5 is 0.0396W/m · K, and the thermal conductivity is reduced by about 2.8%, which proves that the aluminum foil reflection layer prepared by the preparation method of the present invention has a better effect.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (9)

1. An air cushion heat insulation antistream layer is characterized by comprising an aluminum foil reflecting layer I (1), a polyethylene bubble film layer I (2), a polyethylene bubble film layer II (3), a polyethylene bubble film layer III (4) and an aluminum foil reflecting layer II (5) from inside to outside; the aluminum foil reflecting layer I (1) and the aluminum foil reflecting layer II (5) are aluminum foil reflecting layers, and the aluminum foil reflecting layers are an aluminum foil (101), a polyethylene terephthalate film (102) and a chlorinated polyethylene film (103) from outside to inside in sequence; the aluminum foil (101) and the polyethylene terephthalate film (102) and the chlorinated polyethylene film (103) are bonded through a flame-retardant adhesive layer (104).
2. The air cushion heat insulation anti-convection layer as claimed in claim 1, wherein the thickness of the aluminum foil (101) is 6.5-7 μm, the thickness of the polyethylene terephthalate film (102) is 12 μm, the thickness of the chlorinated polyethylene film (103) is 24 μm, and the thickness of the aluminum foil reflection layer is 45 μm.
3. The air cushion heat insulation anti-convection layer as claimed in claim 1, wherein the flame-retardant adhesive layer (104) is a mixture of polyurethane glue and industrial pure ethyl acetate, and the mass concentration ratio of the polyurethane glue to the industrial pure ethyl acetate is 1: 1.5.
4. The air cushion heat insulation anti-convection layer as claimed in claim 1, wherein the polyethylene bubble film layer I (2), the polyethylene bubble film layer II (3) and the polyethylene bubble film layer III (4) are all polyethylene bubble film layers; the polyethylene bubble film layer is a mixture of low-density polyethylene LDPE and antimony pentoxide flame retardant, wherein: the mass content of the antimony pentoxide flame retardant is 5% -8%, and the diameter of the bubbles (37) on the polyethylene bubble film layer is 18-20 mm.
5. The method for preparing an air-cushion heat-insulating anti-convection layer as claimed in any one of claims 1 to 4, comprising the steps of:
s1, preparing an aluminum foil reflecting layer:
s101, glue preparation: the mass concentration ratio of the polyurethane glue to the ethyl acetate solvent is 1:1.5, the polyurethane glue is poured into a glue blending barrel (9), and then the ethyl acetate solvent is stirred while being added for dilution;
s102, winding and penetrating a film: respectively placing an aluminum foil (101), a polyethylene terephthalate film (102) and a chlorinated polyethylene film (103) which need to be glued on a unreeling shaft I (6), a unreeling shaft II (7) and a unreeling shaft III (8), and adjusting the tension of each unreeling shaft to ensure that the aluminum foil (101), the polyethylene terephthalate film (102) and the chlorinated polyethylene film (103) are stably and smoothly unreeled through a guide roller (10);
s103, gluing: adjusting the air pressure of a rotating arm, a scraper and a rubber pressing roller (11) of the compound machine to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in a glue preparation barrel (9) on the surface of the aluminum foil (101);
s104, drying: starting a heating system of the drying oven (13), controlling the temperature of the drying oven (13) to be between 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued aluminum foil (101) passes through a drying tunnel;
s105, compounding: adjusting the composite air pressure to be 0.4-0.7 MPa, the temperature of the composite roller (12) to be 60-80 ℃, and thermally laminating the aluminum foil (101) and the polyethylene terephthalate film (102) under the pressurizing and heating conditions to obtain a composite film (14);
s106, gluing: adjusting the air pressure of a rotating arm, a scraper and a rubber pressing roller (11) of the compound machine to be 0.1-0.4 MPa, and uniformly and continuously coating the glue in the glue preparation barrel (9) on the surface of a polyethylene terephthalate film (102) of a composite film (14);
s107, drying again: starting a heating system of the drying oven (13), controlling the temperature of the drying oven (13) to be 50-60 ℃, 65-75 ℃ and 75-85 ℃, and controlling the linear speed of a transmission shaft to be 50-120 m/min so that the glued composite film (14) passes through a drying tunnel;
s108, recombination: adjusting the composite air pressure to be 0.4-0.7 MPa, the temperature of the composite roller (12) to be 60-80 ℃, and thermally bonding the composite film (14) and the chlorinated polyethylene film (103) under the pressurizing and heating conditions to obtain an aluminum foil reflecting layer I (1);
s109, cooling and rolling: after the aluminum foil reflecting layer I (1) is cooled at room temperature by a cooling roller (15), a paper core is placed, the winding tension is adjusted to be 400-900N and is 100N greater than the unwinding tension, winding is carried out, and when the winding length of the aluminum foil reflecting layer I (1) reaches 2000m, a cutter is started to cut off a membrane material;
s110, curing: placing the compounded aluminum foil reflecting layer I (1) into a curing chamber for curing, wherein the curing temperature is set to be 40-55 ℃, and the curing time is 24-50 h;
s2, preparing a polyethylene bubble film layer:
s201, preparing materials: feeding low-density polyethylene LDPE through a feeding system (16), adding antimony pentoxide into a mixing system (17), wherein the mass content of flame retardant antimony pentoxide is 5-8%, and mixing and melting raw materials in the mixing system (17);
s202, melting: mixing and melting low-density polyethylene LDPE and antimony pentoxide, wherein: the temperature of the feeding section is controlled to be 130-150 ℃, the temperature of the plasticizing section is controlled to be 170-190 ℃, and the temperature of the homogenizing section is controlled to be 200-220 ℃;
s203, extruding the die: the low-density polyethylene LDPE and antimony pentoxide molten material are molded by a flat die (19) on an extruder (18);
s204, plastic film forming: melting the formed low-density polyethylene LDPE and antimony pentoxide, and forming a bubble film through plastic suction by a die head (20), namely successfully preparing a polyethylene bubble layer; in the preparation process of the air bubble layer, the temperature of a die head (20) is controlled to be 160-180 ℃, and the vacuum degree is controlled to be 0.04 MPa;
s3, preparing an air cushion heat insulation anti-convection layer:
s301, pressing: under the action of a first air cushion forming roller (22) and a die head (20), carrying out hot-pressing compounding on the polyethylene bubble film layer I (2) and the aluminum foil reflecting layer I (1) on line to obtain a first single-layer air cushion layer (25); under the action of a second air cushion forming roller (24) and a die head (20), the polyethylene bubble film layer III (4) and the aluminum foil reflecting layer II (5) are subjected to hot-pressing compounding on line to obtain a second single-layer air cushion layer (26);
s302, extrusion: respectively pressing a first single-layer air cushion layer (25) and a second single-layer air cushion layer (26) by a first single-layer air cushion rolling roller (27) and a second single-layer air cushion rolling roller (28) to finally prepare the air cushion heat-insulating anti-convection layer (35) composite material;
s303, rolling: and cutting off the air cushion ear material (36) from the prepared air cushion heat insulation anti-convection layer (35) composite material above the ear material recovery roller (30), and winding the composite material on a winding roller (34) through a gap between a finished product air cushion guide roller (31) and a finished product air cushion rolling roller (32).
6. The preparation method of the air cushion heat-insulating anti-convection layer as claimed in claim 5, wherein the feeding system (16) comprises a storage barrel (1601), a material suction machine (1604) and a drying machine (1607), the top of the material suction machine (1604) is provided with an air suction port (1605), the air suction port (1605) is connected with an air exhaust port (1606) arranged at the top of the drying machine (1607) through a pipeline, the upper side wall of the drying machine (1607) is provided with an air suction port (1603), the air suction port (1603) is connected with one end of an air suction pipe (1602), the other end of the air suction pipe (1602) extends into the storage barrel (1601), the drying machine (1607) is connected with a vacuum pump (1608), and the bottom of the drying machine (1607) is connected above the material mixing system (17) through a melting pipe (1609).
7. The preparation method of the air cushion heat-insulating anti-advection layer as claimed in claim 5, wherein low-density polyethylene LDPE is filled in the storage barrel (1601), a die (19) is connected to the extruder (18), a discharge port of the die (19) faces to an aluminum foil reflection layer I (1) between a first air cushion forming roller (22) and a die head (20), or a discharge port of the lower end of the die (19) faces to an aluminum foil reflection layer II (5) between a second air cushion forming roller (24) and a die head (20), or a discharge port of the lower end of the homogenizing pipe (1710) faces to a first single-layer air cushion layer (25) and a second single-layer air cushion layer (26) between a first single-layer air cushion rolling roller (27) and a second single-layer air cushion rolling roller (28).
8. The preparation method of the air cushion heat insulation anti-convection layer as claimed in claim 5, wherein the air cushion ear material (36) is recovered in an ear material recovery pulverizer (33), the ear material recovery pulverizer (33) is connected to the storage barrel (1601), the length of the air cushion ear material (36) pulverized by the ear material recovery pulverizer (33) is 2-3 mm, and the particle size is 0.2-0.5 mm.
9. The preparation method of the air cushion heat insulation anti-convection layer as claimed in claim 5, wherein the thickness of the air cushion heat insulation anti-convection layer (35) is 6 +/-0.5 mm, and the gram weight is more than or equal to 360g/m2The temperature resistant range is-30 to 100 ℃.
CN202110513876.6A 2021-05-12 2021-05-12 Air cushion heat insulation anti-convection layer and preparation method thereof Pending CN113187987A (en)

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CN110077091A (en) * 2019-06-06 2019-08-02 常州斯威克光伏新材料有限公司 A kind of preparation method of aluminum-plastic composite membrane
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CN104673115A (en) * 2013-11-28 2015-06-03 江苏派恩新型材料有限公司 Preparation method of color film for colored crystal glass
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Application publication date: 20210730