CN110792879B - Processing technology of vacuum heat insulation plate without fear of surface damage - Google Patents

Processing technology of vacuum heat insulation plate without fear of surface damage Download PDF

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Publication number
CN110792879B
CN110792879B CN201910915265.7A CN201910915265A CN110792879B CN 110792879 B CN110792879 B CN 110792879B CN 201910915265 A CN201910915265 A CN 201910915265A CN 110792879 B CN110792879 B CN 110792879B
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layer
core plate
vacuum
film bag
weight
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CN110792879A (en
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张桂萍
张海军
丁军良
刘文亮
杨汉卿
杨东
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Better Advanced Materials Co Co ltd
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Better Advanced Materials Co Co ltd
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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
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0875—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements having a basic insulating layer and at least one covering layer

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention discloses a processing technology of a vacuum heat-insulating plate without surface damage, which comprises an inner vacuum structure layer and at least one outer vacuum structure layer wrapped outside the inner vacuum structure layer, wherein the inner vacuum structure layer consists of an inner core plate and a high vacuum barrier film wrapped outside the inner core plate; the outer vacuum structure layer is composed of an inner vacuum structure, an outer core plate and a high vacuum barrier film wrapped outside the inner vacuum structure, and the outer core plate is prepared by mixing and dispersing glass fibers and the like by a wet method and performing a vacuum forming process. The vacuum insulation board has the characteristics of good heat insulation effect, safety, portability, simple construction, hole opening and the like; after the surface is damaged, the material does not bulge, expand or absorb water, and has good heat preservation and heat insulation performance.

Description

Processing technology of vacuum heat insulation plate without fear of surface damage
Technical Field
The invention relates to the technical field of heat-preservation, heat-insulation and fireproof plates, in particular to a processing technology of a vacuum heat-insulation plate without surface damage.
Background
With the emphasis on energy conservation and emission reduction in various countries, the heat insulation technology is rapidly developed, and the vacuum heat insulation plate is more and more concerned as a novel heat insulation material and a novel heat insulation device. The vacuum insulation panel comprises an insulation core material, a high-barrier film, an adsorbent and the like, wherein the high-barrier film can effectively reduce gas permeation into the insulation system, maintain the internal vacuum degree and keep the product performance. At present, a single-layer core plate and a single-layer barrier film structure are mostly adopted in the market, the structure can prevent gas from permeating to a certain degree, but along with the lapse of time, the film material can be damaged, and the gas enters the inside of a system to damage a vacuum structure, so that the heat insulation performance of a product is failed.
The heat insulating materials selected by the existing vacuum heat insulating plate are glass fiber short fibers, mineral wool and auxiliary addition materials which are mixed, a core plate is manufactured by a wet method, then a high-barrier gas-barrier membrane bag is sleeved outside the core plate, and after vacuumizing treatment, the port of the high-barrier gas-barrier membrane bag is sealed. The vacuum insulation panel with the structure of the single-layer core plate and the single-layer high-barrier gas-barrier membrane bag has the advantages that once the surface is damaged, the problems of air leakage, bulging and the like are caused, so that the heat insulation and heat preservation effects are lost, meanwhile, the conventional vacuum insulation panel is low in impact resistance, poor in toughness and low in surface puncture resistance, and the surface of the high-barrier gas-barrier membrane bag is not smooth enough after vacuum pumping treatment.
In view of the above circumstances, there is a need to design a novel vacuum insulation panel structure and a processing technology thereof, which are used to improve the insulation performance of products, facilitate the extension of the service life of the products, and facilitate the fixation of the products on a wall body due to the surface damage. When the composite material is applied to the fields of building outer walls, refrigerators, freezers and the like, the energy consumption can be reduced, and the heat insulation performance can be improved.
Disclosure of Invention
The invention also aims to overcome the defects in the prior art and provide a processing technology of the vacuum heat insulation plate, which is simple in processing technology, can ensure that various technical indexes of the vacuum heat insulation plate are realized, has good heat insulation effect, long service life, is not afraid of surface damage, is airtight and not swelled after the surface is damaged, is low in batch production and manufacturing cost, and is convenient for fixing the vacuum heat insulation plate on a wall body without the surface damage.
In order to achieve the above object, one of the technical solutions of the present invention is to provide a processing method of a vacuum insulation panel without surface damage, which is characterized in that the processing method comprises the following steps:
firstly, manufacturing an inner core plate of a vacuum insulation panel by a dry method, carding glass fibers, fumed silica, nano microporous materials and aerogel into a sheet layer by a carding machine, laying the sheet layer on a conveyor belt, conveying the sheet layer onto a cutting machine by the conveyor belt, cutting the sheet layer into a set specification by the cutting machine, putting the cut sheet layer into a mold cavity for multiple layers layer by layer, laying a filling layer between the layers, forming an air suction material mounting groove in the inner core plate through a mold, or processing the air suction material mounting groove on the inner core plate, placing the mold cavity provided with the multiple sheet layers and the filling layer under a hot-press molding machine, forming the multiple sheet layers and the filling layer into the inner core plate through the hot-press molding machine, and filling air suction materials into the mold pressing material mounting groove;
or carding glass fiber, gas phase silicon dioxide, nanometer microporous material and aerogel by a carding machine, winding into glass fiber rolls, arranging the glass fiber rolls into glass fiber roll layers tightly, conveying the glass fiber roll layers onto a cutting machine by a conveyor belt, cutting the glass fiber roll layers into a set specification by the cutting machine, placing the cut sheet glass fiber roll layers into a mold cavity layer by layer for multiple layers, connecting the multiple layers of sheet glass fiber roll layers into a whole by a glass fiber wire for a needling machine, forming an air suction material installation groove on an inner core plate through a mold, or processing an air suction material installation groove on the inner core plate, placing the glass fiber sheet roll layers with multiple layers of connected into a whole and the mold cavity under a hot press molding machine, forming the multiple layers of glass fiber roll layers into the inner core plate through the hot press molding machine, and filling air suction material into the air suction material installation groove;
secondly, preparing a wrapped outer core plate outside the inner core plate by a wet method, namely preparing 0-2 parts by weight of a medium-alkali or alkali-free glass fiber chopped strand with the diameter of 1.5-9 mu m, mineral wool with the fiber diameter of 4-12 mu m, fumed silica, aerogel, solid viscose and mica powder by water according to the content of the medium-alkali glass fiber chopped strand of 0-25 parts by weight, the content of the mineral wool of 0-50 parts by weight, the content of the fumed silica of 0-5 parts by weight, the content of the aerogel of 0-5 parts by weight, the content of the solid viscose of 0-5 parts by weight and the content of the mica powder of 0-10 parts by weight, conveying the uniformly stirred slurry to a forming net for flattening, then rolling and drying the core plate to remove moisture, preparing a plane by high-pressure mold heating, and preparing the slurry by using water of a moisture-proof agent, rock powder and a radiation blocking agent, wherein the moisture-proof agent content is 0-2 parts by weight, The manufacturing method comprises the following steps of (1) attaching a moisture-proof agent, perlite powder, a radiation blocking agent and solid viscose to the surface of a formed outer core plate, then cutting and/or bonding a planar core plate to form a wrapped outer core plate with an edge structure, wherein a bonding layer is attached to the outer surface of the outermost wrapped outer core plate, or a viscose raw material is added into the raw material of the outermost wrapped outer core plate;
thirdly, manufacturing the inner high-barrier gas film bag and the outer high-barrier gas film bag, arranging five materials of a glass fiber braided layer, a nylon layer, an aluminum-plated PET plastic film layer, a PET plastic film layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer in any order, coating viscose between the layers, compounding the five materials of the glass fiber braided layer, the nylon layer, the aluminum-plated PET plastic film layer, the EVOH layer, the aluminum foil layer and the PE plastic film layer into the high-barrier gas film bag through a hot press in any order, and finally coating an adhesive layer on the inner surfaces of at least the inner high-barrier gas film bag and the outer high-barrier gas film bag;
fourthly, bagging and heat sealing, cutting the inner high-barrier air film bag manufactured in the third step into a set size, firstly laying the sheet-shaped inner high-barrier air film bag in a vacuum pumping chamber of vacuum pumping equipment, then placing an inner core plate filled with air suction materials on or under the sheet-shaped inner high-barrier air film bag, then closing the vacuumizing chamber to start butting the core board for vacuumizing treatment, after the vacuumizing treatment is finished, in vacuumizing or transferring the core board into another vacuum chamber, butting the flaky inner high-barrier gas film bag from the upper surface or the lower surface of the core board, partially overlapping and folding the core board, then carrying out hot-press sealing, simultaneously, the length of the sheet-shaped inner high-barrier gas film bag is sealed with two ends of the inner core plate in a hot-pressing way, then the two ends are folded to the upper surface or the lower surface of the inner core plate and sealed in a hot-pressing way again to obtain an inner vacuum heat-insulating structure layer, and the overlapped parts of the inner high-barrier gas film bag are bonded together;
laying the flaky outer high-barrier gas film bag in a vacuum pumping chamber of a vacuum pumping device again, placing one surface of the wrapped outer core plate on or below the flaky outer high-barrier gas film bag, placing the inner vacuum heat-insulating structure layer on one surface of the outer core plate, fastening the other surface of the outer core plate with one surface of the outer core plate, closing the vacuum pumping chamber to perform vacuum pumping treatment on the outer core plate, transferring the inner core plate into another vacuum chamber after vacuum pumping treatment, overlapping and folding the flaky outer high-barrier gas film bag from the upper surface or the lower surface of the outer core plate, performing hot-press sealing, simultaneously performing hot-press sealing on two ends of the flaky outer high-barrier gas film bag which are longer than the wrapped outer core plate, folding the two ends onto or lower surface of the wrapped outer core plate, performing hot-press sealing again to obtain a first outer vacuum heat-insulating structure layer, and performing hot-press sealing while arranging the outermost high-barrier gas film bag and the outermost core plate, The overlapped parts of the outer high-barrier air film bags are bonded together, and the steps are repeated for a plurality of times to prepare the multi-layer outer vacuum heat-insulating structure layer.
In order to meet the requirement of the vacuum degree set in the vacuum heat insulation plate, enable the heat insulation effect to reach the optimal state, improve the processing efficiency of the vacuum heat insulation plate as much as possible and reduce the processing and manufacturing cost, the preferable technical scheme is that in the vacuumizing treatment process in the step 4, the inner core plate is baked for 5-20 minutes at 150-300 ℃, then is placed in a high vacuum box body for vacuumizing, the vacuumizing time is 3-20 minutes, and the vacuum degree in the vacuum chamber reaches 5 x 10-3Pa~3*100Pa。
In order to ensure that the high-barrier air film bag can firmly and tightly package the core plate inside the high-barrier air film bag, so that the core plate is firmly and airtightly bonded, and the inner surface of the high-barrier air film bag and the outer surface of the core plate layer are bonded together to form an integral structure, under the condition that the high-barrier air film bag is locally damaged, the bag body and the core plate are not separated and do not swell, the preferable technical scheme is that the temperature of vacuum compounding in the step 4 is 120-250 ℃, and the compounding time is 10-30 seconds.
The invention also aims to overcome the defects in the prior art and provide a vacuum heat insulation plate which has the advantages of simple structure, good heat insulation effect, long service life, no fear of surface damage, no bulging after surface damage, low cost of pore-opening mass production and convenient fixation on a wall body.
In order to achieve the purpose, the second technical scheme of the invention is to design a vacuum heat insulation panel without surface damage, the vacuum heat insulation panel comprises at least two vacuum heat insulation structure layers, namely an inner vacuum heat insulation structure layer and at least one outer vacuum heat insulation structure layer wrapped outside the inner vacuum heat insulation structure layer, the inner vacuum heat insulation structure layer comprises an inner core plate, an installation groove of a gas suction material is arranged on the inner core plate, the gas suction material is arranged in the installation groove, an inner high-barrier gas film bag is sleeved outside the inner core plate provided with the gas suction material, the inner high-barrier gas film bag provided with the inner core plate is vacuumized and heat-sealed by high-vacuum equipment to form the inner vacuum heat insulation structure layer, and the inner core plate is prepared from one or more of glass fiber, gas-phase silicon dioxide, nano microporous material and aerogel through carding hot-pressing or dispersion; the outer vacuum heat insulation structure layer is made by an outer core plate and an outer high vacuum barrier film wrapped outside the outer core plate through vacuum pumping and heat sealing by high vacuum equipment, and the outer core plate is made by mixing, dispersing and wet-forming glass fibers, mineral fibers, aerogel, inorganic filling powder, hydrophobic materials and adhesive materials and then through a vacuum forming process; the inner high-barrier gas film bag and the outer high-barrier gas film bag are respectively formed by compounding five materials of a glass fiber woven layer, a nylon layer, an aluminized PET plastic film layer, a PET plastic film layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer according to any sequence, and an adhesive layer is attached to the inner surface of the outer high-barrier gas film bag.
In order to facilitate the processing and manufacturing of the core plate layer and improve the strength and flexibility of the core plate layer, the preferred technical scheme is that the core plate comprises a plurality of glass fibers, fumed silica, nano microporous materials and aerogel which are arranged in a stacked mode and carded, and a hot-press forming layer is formed by carding, lapping and hot-pressing according to a certain proportion; a filling layer is arranged between the adjacent lapping hot-press molding layers; the lapping hot-press molding layer and the filling layer are hot-pressed to form an inner core plate, and an installation groove for a gas suction material is formed in the inner core plate; the inorganic filling powder is solid viscose and mica powder which are uniformly mixed.
In order to bond the glass fiber into the core plate with an integral structure more effectively, more firmly, more conveniently and more cheaply, the preferable technical scheme is that the solid viscose is one or any mixture of hot melt viscose, pressure sensitive adhesive and cassava powder, the solid viscose accounts for 0-5% of the weight of the core plate, the mica powder accounts for 0-20% of the weight of the core plate, and the ratio of the total thickness of the lapping hot press molding layer and the filling layer in a natural state to the thickness of the core material after hot press molding is 3-5: 1.
In order to simplify the processing and manufacturing process of the core plate, reduce the processing and manufacturing cost of the core plate, reduce the pollution of the core plate to the environment in the processing and manufacturing, and reduce the energy consumption in the processing and manufacturing, the preferred technical scheme is that the inner core plate comprises a plurality of glass fiber, fumed silica, nano microporous material and aerogel roll layers which are stacked, the adjacent glass fiber, fumed silica, nano microporous material and aerogel roll layers are connected through a glass fiber short-filament needle punching method, the inner core plate is formed after hot pressing, and the inner core plate is provided with an installation groove for a gas suction material.
In order to facilitate the processing and manufacturing of the core board layer, and simultaneously improve the strength and flexibility of the core board layer, the puncture resistance and corrosion resistance of the outer core board, and the waterproof performance of the outer core board after the outer core board is not damaged, the preferable technical scheme is that the raw material components of the wrapped outer core board comprise medium-alkali or alkali-free glass fiber chopped strands with the diameter of 1.5-9 mu m, mineral wool with the fiber diameter of 4-12 mu m, fumed silica, aerogel, solid viscose and mica powder, the raw materials are uniformly mixed by using water by a wet method, then are subjected to net forming, rolling, moisture filtering and hot pressing to prepare the outer core board, and the outer core board is prepared into the wrapped outer core board with an edge structure by mould pressing and/or bonding, wherein the content of the medium-alkali or alkali-free glass fiber chopped strands is 0-25 parts by weight, the content of the mineral wool is 0-50 parts by weight, and the content of the fumed silica is 0-5 parts by, The content of the aerogel is 0-5 parts by weight, the content of the solid viscose is 0-5 parts by weight, the content of the mica powder is 0-10 parts by weight, and the solid viscose is one or any mixture of hot melt viscose, pressure sensitive adhesive and cassava powder.
In order to facilitate the processing and manufacturing of the core plate layer, the strength and flexibility of the core plate layer can be improved, the puncture resistance and corrosion resistance of the outer core plate are improved, and the waterproof performance of the outer core plate is improved without being damaged, the further preferable technical scheme is that the wrapped outer core plate further comprises a moisture-proof agent, perlite powder and a radiation blocking agent in raw material components, wherein the moisture-proof agent is 0-2 parts by weight, the perlite powder is 0-2 parts by weight, the radiation blocking agent is 0-1 part by weight, and the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid viscose are attached to the surface of the formed outer core plate.
In order to further improve the impact strength and the puncture strength of high resistant barrier gas film bag, preferred technical scheme still, the nylon on nylon layer is biaxial stretching thickening nylon, and the thickness of biaxial stretching thickening nylon is 12~35 um.
The invention has the advantages and beneficial effects that: the processing technology of the vacuum heat-insulation plate without the fear of surface damage has the characteristics of simple process, good heat-insulation effect, long service life, no fear of surface damage, no air leakage and no bulging after the surface damage, low batch production and manufacturing cost, convenience for fixing the vacuum heat-insulation plate on a wall body and the like. The processing technology has the characteristics of simple processing technology, capability of ensuring that various technical indexes of the vacuum heat-insulating plate are realized, good heat-insulating effect, long service life, no fear of surface damage, no air leakage and no bulging after the surface damage, low manufacturing cost of batch production, convenience for fixing the vacuum heat-insulating plate on a wall body and the like.
The vacuum heat-insulating plate without the fear of surface damage is mainly characterized in that mica powder is added into a filling layer and applied as follows: 1. the lamellar fillers form an essentially parallel alignment in the paint film, the penetration of water and other corrosive substances into the paint film is strongly blocked, and in the case of high-quality ultrafine mica powder (the aspect ratio of the wafer is at least 50 times, preferably more than 70 times), the penetration time of water and other corrosive substances into the paint film is generally increased by a factor of 3. The superfine mica powder filler is much cheaper than seed resin, so the superfine mica powder filler has very high technical value and economic value. The use of high-quality superfine mica powder is an important means for improving the quality and performance of the anti-corrosion filler. In the filling process, the superfine mica powder wafer lies down under the action of surface tension before the filling layer is solidified, and a structure which is parallel to each other and the surface of the filling layer is automatically formed. The orientation of the layer-by-layer arrangement is just vertical to the direction of the corrosive substance penetrating through the paint film, and the barrier effect is fully exerted. 2. Improving the physical and mechanical properties of the filler layer the use of ultrafine mica powder can improve a range of physical and mechanical properties of the filler layer. The key point is the morphological characteristics of the filler, namely the diameter-thickness ratio of the flaky filler and the length-diameter ratio of the fibrous filler, and the particle filling material is like sand and stones in concrete and plays a role in reinforcing the reinforcing steel bar. 3. The improvement of the abrasion resistance and the hardness of the existing filling layer are limited, and the strength of a plurality of fillers is not high (such as talcum powder). On the contrary, the ultra-fine mica powder is one of the components of granite, and the hardness and mechanical strength thereof are large. Therefore, the filling layer is added with the ultrafine mica powder as the filler, and the puncture resistance of the filling layer can be obviously improved. 4. The insulating property, superfine mica powder has extremely high resistance, and is the most excellent insulating material per se. The insulating material and organic silicon resin or organic silicon boron resin form a compound, and the compound is converted into a ceramic substance with good mechanical strength and insulating property when meeting high temperature, so that the vacuum insulating plate made of the insulating material still keeps the original insulating state even after being burnt out in fire. This is very important for vacuum insulation panels. 5. The flame-retardant ultrafine mica powder is a valuable flame-retardant filler, and if the flame-retardant ultrafine mica powder is matched with an organic halogen flame retardant, the flame-retardant and fireproof coating can be prepared. 6. The ultraviolet and infrared resistant superfine mica powder has excellent ultraviolet and infrared ray shielding performance. Therefore, the ultraviolet resistance of the paint film can be greatly improved by adding the wet-process ultrafine mica powder into the outdoor vacuum insulation panel. Its infrared shielding property is used to prepare heat insulating material. 7. The heat radiation and high temperature material superfine mica powder has good infrared radiation capability, and can cause excellent heat radiation effect if matched with ferric oxide and the like. 8. The sound insulation and shock absorption effects, the superfine mica powder can obviously change a series of physical moduli of the material, and the viscoelasticity of the material is formed or changed. Such materials efficiently absorb vibrational energy, attenuate shock waves and sound waves. In addition, the vibration wave and the sound wave form repeated reflection between the mica wafers, and the effect of weakening the energy is also caused. The superfine mica powder is also used for preparing sound-deadening, sound-insulating and shock-absorbing materials.
The vacuum heat insulation plate at least has two layers of vacuum heat insulation structures, and the core plate and the high-barrier gas film bag are bonded by glue and/or bonding to form an integral structure. Or the inner surfaces of the high-barrier air film bags at the two sides of the cavity area can be directly bonded together to form the air isolation area.
Therefore, even if the surface of the vacuum insulation panel is damaged, air does not enter the vacuum insulation panel of the inner layer. And the gas entering the damaged part under the action of the adhesive can not be diffused, so that the core plate and the high-barrier gas film bag are separated, and the film bag is expanded. In addition, if aerogel or hot melt adhesive is added into one material or any combination material of glass fiber, meteorological silica and an inorganic fiber board, the aerogel or hot melt adhesive is put into a high-barrier air film bag in a core board and is vacuumized, and then the high-barrier air film bag is heated, so that the vacuum insulation board can form an integral board. Therefore, the vacuum insulation panel has better heat insulation and fire prevention performance than the existing vacuum insulation panel. Meanwhile, special tool equipment is adopted in batch production, the production cost is not obviously increased, and the thickness of each layer of core plate can be correspondingly reduced in proportion due to the fact that the number of the core plate layers is increased, so that the total thickness of the vacuum heat-insulating plate cannot be obviously increased.
Drawings
FIG. 1 is a schematic cross-sectional view of a vacuum insulation panel of the present invention;
FIG. 2 is one of the schematic views of the exploded structure of FIG. 1 with the high barrier gas film pouch removed;
fig. 3 is a second schematic diagram of the exploded structure of fig. 1 with the high barrier gas film bag removed.
In the figure: 1. an inner core board; 2. an inner high-barrier air film bag; 3. an inner vacuum heat insulation structure layer; 4. an outer core board; 4.1, edge structure; 5. an outer high barrier gas film bag; 6. and an outer vacuum heat insulation structure layer.
Detailed Description
The following description of the embodiments of the present invention will be made 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
A processing technology of a vacuum heat insulation plate without surface damage comprises the following processing steps:
firstly, manufacturing the inner core plate 1 by a dry method, carding glass fibers, fumed silica, nano microporous materials and aerogel into a sheet layer by a carding machine, laying the sheet layer on a conveyor belt, conveying the sheet layer onto a cutting machine by the conveyor belt, cutting the sheet layer into a set specification by the cutting machine, putting the cut sheet layer into a mold cavity for multiple layers layer by layer, laying a filling layer between the layers, forming an air suction material mounting groove in the inner core plate 1 through a mold, or processing an air suction material mounting groove on the inner core plate 1, placing the mold cavity with the multiple sheet layers and the filling layer under a hot-press molding machine, pressing the multiple sheet layers and the filling layer into the inner mold core plate 1 through the hot-press molding machine, and filling air suction materials into the air suction material mounting groove;
or carding glass fiber, gas phase silicon dioxide, nanometer microporous material and aerogel with a carding machine, winding into glass fiber rolls, arranging the glass fiber rolls into glass fiber roll layers tightly, conveying the glass fiber roll layers to a cutting machine, cutting the glass fiber roll layers into a set specification with the cutting machine, placing the cut flaky glass fiber roll layers into a mold cavity layer by layer for multiple layers, connecting the multilayer flaky glass fiber roll layers into a whole with a glass fiber wire for a needling machine, forming an air suction material mounting groove on the inner core plate 1 through a mould, or processing the air suction material mounting groove on the inner core plate 1, placing a sheet-shaped roll layer provided with a plurality of layers of glass fibers connected into a whole and a mould cavity under a hot-press forming machine, molding the multilayer glass fiber roll layer into the inner core plate 1 by a hot-press molding machine, and filling an air suction material into the air suction material mounting groove;
secondly, manufacturing the wrapped type outer core board of each layer outside the inner core board 1 by a wet method, wherein medium-alkali or alkali-free glass fiber chopped strands with the diameter of 1.5 mu m, mineral wool with the fiber diameter of 4 mu m, fumed silica, aerogel, solid viscose and mica powder are manufactured into slurry by water according to the content of the medium-alkali glass fiber chopped strands of 25 parts by weight, the content of the mineral wool of 50 parts by weight, the content of the fumed silica of 5 parts by weight, the content of the aerogel of 5 parts by weight, the content of the solid viscose of 5 parts by weight and the content of the mica powder of 10 parts by weight, conveying the uniformly stirred slurry to a forming net for flattening, then removing moisture by rolling and drying, manufacturing a plane core board by high-temperature hot die pressing, and manufacturing the slurry by water of a moisture-proof agent, pearl powder and a radiation blocking agent, wherein the content of the moisture-proof agent is 2 parts by weight, and the content of the pearl rock powder is 2 parts by weight, The content of the radiation blocking agent is 1 part by weight, the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid viscose glue are attached to the surface of the formed outer core plate, then the plane core plate is cut and/or bonded to form a wrapped outer core plate with an edge structure, a bonding layer is attached to the outer surface of the wrapped outer core plate at least at the outermost layer, or a viscose glue raw material is added into the raw material of the wrapped outer core plate at least at the outermost layer;
thirdly, manufacturing the inner high-barrier gas film bag 2 and the outer high-barrier gas film bag 5, sequentially arranging five materials of a glass fiber braided layer, a nylon layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer, coating viscose between the layers, sequentially compounding the five materials of the glass fiber braided layer, the nylon layer, the EVOH layer, the aluminum foil layer and the PE plastic film layer into the high-barrier gas film bags (2 and 5) through a hot press, and finally coating an adhesive layer on the inner surfaces of at least the inner high-barrier gas film bag 2 and the outer high-barrier gas film bag 5;
fourthly, bagging and heat sealing, cutting the inner high-barrier air film bag 2 manufactured in the third step into a set size, firstly laying the sheet-shaped inner high-barrier air film bag 2 in a vacuum pumping chamber of vacuum pumping equipment, then placing the inner core plate 1 filled with air suction materials on or under the sheet-shaped inner high-barrier air film bag 2, then closing the vacuumizing chamber to start butting the core board 1 for vacuumizing treatment, after the vacuumizing treatment is finished, in vacuumizing or transferring the bag into another vacuum chamber, butting the sheet-shaped inner high-barrier gas film bag 2 from the upper surface or the lower surface of the core board 1, partially overlapping and folding the bag, then carrying out hot-press sealing, meanwhile, the length of the sheet-shaped inner high-barrier gas film bag 2 is sealed with two ends of the inner core plate in a hot-pressing manner, then the two ends are folded to the upper surface or the lower surface of the inner core plate and sealed in a hot-pressing manner again to obtain an inner vacuum heat-insulating structure layer, and the overlapped parts of the inner high-barrier gas film bag are bonded together;
laying the flaky outer high-barrier gas film bag 5 in a vacuumizing cavity of vacuumizing equipment again, placing one surface of the wrapped outer core plate 4 on or below the flaky outer high-barrier gas film bag 5, placing the inner vacuum heat-insulating structure layer 3 on one surface of the outer core plate 4, fastening the other surface of the outer core plate 4 with one surface of the outer core plate 4, closing the vacuumizing cavity to begin vacuumizing the outer core plate 4, after vacuumizing, transferring the inside of the vacuumizing cavity or into another vacuum cavity, overlapping and folding the flaky outer high-barrier gas film bag 5 from the upper or lower butt part of the outer core plate 4, performing hot-press sealing, simultaneously making the flaky outer high-barrier gas film bag 5 longer than two ends of the wrapped outer core plate 4, folding the two ends to the upper or lower surface of the wrapped outer core plate 4, performing hot-press sealing again to obtain a first outer vacuum heat-insulating structure layer 6, and in the hot-pressing sealing process, the outermost high-barrier air film bag 5 and the outer core plate 4 and the overlapped parts of the outer high-barrier air film bag 5 are bonded together, and the steps are repeated for multiple times to obtain the multi-layer outer vacuum heat-insulating structure layer.
In order to meet the requirement of the vacuum degree set in the vacuum insulation panel, to make the insulation effect reach the best state, and to improve the processing efficiency of the vacuum insulation panel as much as possible and reduce the processing and manufacturing cost, the preferred embodiment of the invention is that, in the vacuum-pumping process in the step 4, the inner core plate is baked for 20 minutes at 150 ℃ and then placed in a high-vacuum box for vacuum-pumping, the vacuum-pumping time is 20 minutes, and the vacuum degree in the vacuum chamber reaches the vacuum degree5*10-3PaPa。
In order to ensure that the high-barrier air film bag can firmly and tightly seal the core plate inside the high-barrier air film bag, so that the core plate is firmly and airtightly bonded, and the inner surface of the high-barrier air film bag and the outer surface of the core plate layer are bonded together to form an integral structure, so that the bag body and the core plate are not separated and do not swell under the condition that the high-barrier air film bag is locally damaged, the preferred embodiment of the invention also has the following steps that the vacuum compounding temperature in the step 4 is 120 ℃, and the compounding time is 30 seconds.
Example 2
On the basis of the embodiment 1, 25 parts by weight of medium-alkali glass fiber chopped strands or alkali-free glass fiber cotton, 50 parts by weight of mineral wool, 5 parts by weight of fumed silica, 5 parts by weight of aerogel, 4 parts by weight of solid viscose and 9 parts by weight of mica powder are prepared into slurry by water, the uniformly stirred slurry is conveyed to a forming net for flattening, then the slurry is rolled and dried to remove moisture, a plane core plate is prepared by high-temperature hot die pressing, and the plane core plate is cut and/or bonded to prepare the wrapped outer core plate 4 with the edge structure of 4.1; the content of the moisture-proof agent is 0.5 weight part, the content of the perlite powder is 0.5 weight part, and the content of the radiation blocking agent is 1 weight part.
In the vacuum-pumping process in the step 4, the inner core plate is baked for 13 minutes at 200 ℃ and then placed in a high-vacuum box for vacuum-pumping, the vacuum-pumping time is 11 minutes, and the vacuum degree in a vacuum chamber reaches 4.5 x 10-2PaPa。
The temperature of vacuum compounding in the step 4 was 185 ℃ and the compounding time was 20 seconds.
Example 3
On the basis of example 1, medium-alkali or alkali-free glass fiber chopped strands with the diameter of 9 mu m, mineral wool with the fiber diameter of 12 mu m, fumed silica, solid viscose and mica powder are uniformly mixed by wet method with water, then the mixture is subjected to web forming, rolling, moisture filtering and hot pressing to prepare a core plate, the core plate is cut and/or bonded to prepare a wrapped outer core plate, wherein the content of the medium-alkali or alkali-free glass fiber chopped strands is 25 parts by weight, the content of the mineral wool is 50 parts by weight, the content of the fumed silica is 5 parts by weight, the content of the aerogel is 5 parts by weight, the content of the solid viscose is 3 parts by weight, the content of the mica powder is 8 parts by weight, the slurry is prepared by water, the content of the moisture-proof agent is 1.5 parts by weight, the content of the perlite powder is 1 part by weight and the content of the radiation blocking agent is 1 part by weight, the uniformly stirred slurry is conveyed to a forming net and spread, then removing moisture by rolling and drying, then preparing a plane core plate by high-temperature hot die pressing, and then preparing the plane core plate into a wrapping type outer core plate 4 with an edge structure 4.1 by cutting and/or bonding;
in the vacuum-pumping process in the step 4, the inner core plate is baked for 5 minutes at 300 ℃, then is placed in a high-vacuum box body for vacuum-pumping, the vacuum-pumping time is 5 minutes, and the vacuum degree in a vacuum chamber reaches 3 x 100PaPa。
The temperature of vacuum compounding in the step 4 is 250 ℃, and the compounding time is 10 seconds.
Example 4
A vacuum insulation panel without surface damage comprises two vacuum insulation structure layers, namely an inner vacuum insulation structure layer 3 and an outer vacuum insulation structure layer 6 wrapping the outer part of the inner vacuum insulation structure layer 3, wherein the inner vacuum insulation structure layer 3 comprises an inner core plate 1, the inner core plate 1 is provided with a mounting groove for a gas suction material, the gas suction material is arranged in the mounting groove, an inner high-barrier gas film bag 2 is sleeved outside the inner core plate 1 provided with the gas suction material, the inner high-barrier gas film bag 2 provided with the inner core plate 1 is vacuumized and thermally sealed by high-vacuum equipment to form the inner vacuum insulation structure layer 3, and the inner core plate 1 is prepared from glass fiber, fumed silica, nano microporous materials and aerogel by a carding hot-pressing or dispersion wet vacuum process; the outer vacuum heat insulation structure layer 6 is made by an outer core plate 4 and an outer high vacuum barrier film 5 wrapped outside the outer core plate 4 through vacuum pumping and heat sealing by high vacuum equipment, and the outer core plate 4 is made by mixing and dispersing wet method of glass fiber, mineral fiber, aerogel, inorganic filling powder, hydrophobic material and adhesive material and then vacuum forming process; the inner high-barrier gas film bag 2 and the outer high-barrier gas film bag 5 are respectively formed by sequentially compounding five materials of a glass fiber woven layer, a nylon layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer in sequence, and an adhesive layer is attached to the inner surface of the outer high-barrier gas film bag.
In order to facilitate the processing and manufacturing of the core plate layer and improve the strength and flexibility of the core plate layer, the preferred embodiment of the invention is that the core plate 1 comprises a plurality of glass fibers, fumed silica, nano-microporous materials and aerogel which are arranged in a stacking way and carded, and a hot-press molding layer is formed by carding, lapping and hot-pressing according to a certain proportion; a filling layer is arranged between the adjacent lapping hot-press molding layers; the lapping hot-press molding layer and the filling layer are hot-pressed to form an inner core plate 1, and an installation groove for a gas suction material is formed in the inner core plate 1; the inorganic filling powder is solid viscose and mica powder which are uniformly mixed.
In order to bond the glass fiber into the core plate with an integral structure more effectively, more firmly, more conveniently and more cheaply, the invention further preferably adopts the embodiment that the solid viscose is formed by mixing hot-melt viscose, pressure-sensitive adhesive and cassava powder, the solid viscose accounts for 5 percent of the weight of the core plate, the mica powder accounts for 10 percent of the weight of the core plate, and the ratio of the total thickness of the lapping hot-press molding layer and the filling layer in a natural state to the thickness of the core material after hot-press molding is 3: 1.
In order to simplify the core board processing and manufacturing process, reduce the core board processing and manufacturing cost, reduce the pollution of the core board to the environment during processing and manufacturing, and reduce the energy consumption during processing and manufacturing, the preferred embodiment of the invention is that the core board 1 comprises a plurality of glass fiber, fumed silica, nano-microporous material, aerogel roll layers which are stacked, the adjacent glass fiber, fumed silica, nano-microporous material, aerogel roll layers are connected through a glass fiber short-filament needle punching method, the inner core board 1 is formed through hot pressing, and the inner core board 1 is provided with an installation groove for the air suction material.
In order to facilitate the processing and manufacturing of the core board layer 4, and to improve the strength and flexibility of the core board layer, the puncture resistance and corrosion resistance of the outer core board 4, and the waterproof performance after the core board layer is not damaged, the preferred embodiment of the invention is that the raw material components of the wrapped outer core board 4 comprise medium-alkali or alkali-free glass fiber chopped strands with the diameter of 1.5um, mineral wool with the fiber diameter of 4 mu m, fumed silica, aerogel, solid viscose and mica powder, the raw materials are uniformly mixed by using water by a wet method, then the mixture is subjected to net forming, rolling, moisture filtering and hot pressing to prepare the outer core board 4, and the outer core board 4 is prepared into the wrapped outer core board 4 with an edge structure 4.1 by mould pressing and/or bonding, wherein the content of the medium-alkali or alkali-free glass fiber chopped strands is 25 parts by weight, the content of the mineral wool is 50 parts by weight, the content of the fumed silica is 5 parts by weight, The content of the aerogel is 5 parts by weight, the content of the solid viscose is 5 parts by weight, the content of the mica powder is 10 parts by weight, and the solid viscose is a mixture of hot melt viscose, pressure sensitive adhesive and cassava powder.
In order to facilitate the processing and manufacturing of the core plate layer, and simultaneously improve the strength and flexibility of the core plate layer, the puncture resistance and corrosion resistance of the outer-layer core plate, and the waterproof performance of the core plate layer without damage, the further preferable embodiment of the invention is that the raw material components of the wrapped outer core plate further comprise a moisture-proof agent, perlite powder and a radiation blocking agent, wherein the content of the moisture-proof agent is 2 parts by weight, the content of the perlite powder is 2 parts by weight, the content of the radiation blocking agent is 1 part by weight, and the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid viscose are attached to the surface of the molded outer core plate.
In order to further improve the impact strength and puncture strength of the high-barrier air film bag, the nylon of the nylon layer is biaxially oriented thickened nylon, and the thickness of the biaxially oriented thickened nylon is 12 um.
Example 5
The vacuum heat insulation plate without surface damage on the basis of the embodiment 4 is different from the embodiment 1 in that solid viscose accounts for 3% of the weight of the core plate, mica powder accounts for 8% of the weight of the core plate, and the ratio of the total thickness of the lapping hot press molding layer and the filling layer in a natural state to the thickness of the core material after hot press molding is 4: 1.
The raw material components of the wrapping type outer core plate 4 comprise medium alkali glass fiber short cut threads or alkali-free glass fiber cotton with the diameter of 4um, mineral wool with the fiber diameter of 8 mu m, fumed silica, solid viscose and mica powder, the raw materials are mixed uniformly by wet method and water, then the mixture is formed into a net, rolled and filtered to remove moisture, the outer core plate 4 is manufactured by hot pressing, the outer core plate 4 is manufactured into a wrapping type outer core plate 4 with an edge structure 4.1 by cutting and/or bonding, wherein the content of the medium alkali glass fiber chopped strand or alkali-free glass fiber cotton is 25 weight parts, the content of the mineral wool is 50 weight parts, the content of the fumed silica is 5 weight parts, the content of the aerogel is 5 weight parts, the content of the solid viscose is 3 weight parts, the content of the mica powder is 9 weight parts, the solid viscose is one or any mixture of hot melt viscose, pressure sensitive adhesive and cassava powder.
The wrapped outer core plate 4 further comprises a moisture-proof agent, perlite powder and a radiation blocking agent, wherein the moisture-proof agent, the perlite powder and the radiation blocking agent are contained in the wrapped outer core plate 4, the moisture-proof agent is 1 part by weight, the perlite powder is contained in the wrapped outer core plate 1 part by weight, and the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid viscose are attached to the surface of the formed outer core plate 4.
The nylon on nylon layer is biaxial stretching thickening nylon, and biaxial stretching thickening nylon's thickness is 20 um.
Example 6
The vacuum heat insulation plate without surface damage on the basis of the embodiment 4 is different from the embodiment 1 in that solid viscose accounts for 2% of the weight of the core plate, mica powder accounts for 6% of the weight of the core plate, and the ratio of the total thickness of the glass fiber, the fumed silica, the nano microporous material, the aerogel layer and the filling layer in a natural state to the thickness of the core material after hot press forming is 5: 1.
The raw material components of the wrapped outer core plate 4 comprise medium alkali glass fiber chopped strands or alkali-free glass fiber cotton with the diameter of 9 mu m, mineral wool with the fiber diameter of 12 mu m, fumed silica, solid viscose and mica powder, the raw materials are uniformly mixed by wet water, then are subjected to web formation, rolling and moisture filtering, a core plate is manufactured through hot pressing, and the core plate is cut and/or bonded to manufacture the wrapped outer core plate 4 with an edge structure 4.1, wherein the content of the medium alkali glass fiber chopped strands or alkali-free glass fiber cotton is 25 parts by weight, the content of the mineral wool is 50 parts by weight, the content of the fumed silica is 5 parts by weight, the content of aerogel is 5 parts by weight, the content of the solid viscose is 4 parts by weight, and the content of the mica powder is 9 parts by weight, and the solid viscose is mixed by hot melt viscose and the cassava powder.
In order to facilitate the processing and manufacturing of the outer core plate 4, and simultaneously improve the strength and flexibility of the outer core plate 4, the puncture resistance and corrosion resistance of the outer core plate 4, and the waterproof performance of the outer core plate 4 without damage, the invention further preferably adopts an embodiment that raw material components of the wrapped outer core plate 4 further comprise a moisture-proof agent, perlite powder and a radiation blocking agent, wherein the moisture-proof agent is 0.5 part by weight, the perlite powder is 0.5 part by weight, and the radiation blocking agent is 1 part by weight, and the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid viscose are attached to the surface of the molded outer core plate 4.
In order to further improve the impact strength and the puncture strength of the high-barrier air film bag, the invention also has the preferable technical scheme that the nylon of the nylon layer is biaxially stretched and thickened nylon, and the thickness of the biaxially stretched and thickened nylon is 15 um.
As shown in fig. 1, 2 and 3, the present invention is a vacuum insulation panel without fear of surface damage, and the vacuum insulation panel structure comprises two vacuum insulation structure layers, wherein two vacuum insulation structure layers can be used as a preferred embodiment. Interior vacuum insulation structural layer 3 includes interior core 1, and interior vacuum insulation structural layer 3 is just constituted to interior high resistant gas film bag 2 of cladding in the outward appearance of core 1, and interior vacuum insulation structural layer 3 is wrapped up by outer core 4, and the outward appearance cladding of outer core 4 has outer high resistant gas film bag 5 and constitutes outer vacuum insulation structural layer 6. In the actual engineering use process, according to the heat insulation requirements of specific engineering on the vacuum heat insulation plate, the requirements on the thickness of the vacuum heat insulation plate, different requirements on the manufacturing cost and the like, the outer core plate 4 of the vacuum heat insulation plate and the outer high-barrier gas film bag 5 covering the outer core plate 4 can be alternately repeated for multiple times to form the multilayer vacuum heat insulation plate.
In order to facilitate the large-area quick adhesion of the vacuum insulation panels on the outer wall surface of the building body and ensure the smooth and beautiful wall surface after construction, the preferred embodiment of the invention is that the inner vacuum insulation structure layer 3 can be made into a rectangular plate structure, and the outer vacuum insulation structure layer 6 and each outer vacuum insulation layer 6 behind the first outer vacuum insulation structure layer 6 can be made into a rectangular plate structure. That is, the outer surface of each outer vacuum insulation structure layer 6 after the first outer vacuum insulation structure layer 6 is also a rectangular flat plate, and a vacuum insulation structure layer is wrapped inside each flat plate.
In order to facilitate the bonding of the vacuumized outer core plate layer 4 and the outer high-barrier gas film bag 5 together so as to form the integral structure of the vacuum insulation panel, and simultaneously ensure that the outer core plate 4 and the high-barrier gas film bag 5 cannot be separated under the condition that the outer high-barrier gas film bag 5 (taking two vacuum insulation layers as an example) is damaged, thereby causing the bulging of the vacuum insulation panel, the invention further preferably adopts the embodiment that bonding layers can be attached to the outer surface of the outer core plate 4 at the outermost layer of the wrapping type and the inner surface of the outer high-barrier gas film bag 5 at the outermost layer.
In order to facilitate the bonding of the vacuumized outer core plate 4 and the outer high-barrier gas film bag 5 together to form an integral structure of the vacuum insulation panel, and simultaneously ensure that the outer core plate 4 and the high-barrier gas film bag 5 cannot be separated under the condition that the high-barrier gas film bag 5 (taking two vacuum insulation layers as an example) is damaged, thereby causing the bulging of the vacuum insulation panel, the invention also has a further preferred embodiment that the raw materials of the outermost outer core plate 4 and the raw materials of the inner layer of the outermost high-barrier gas film bag 5 are mixed with adhesive raw materials.
In order to facilitate the bonding of the vacuumized core plate layer and the high-barrier gas film bag together to form an integral structure of the vacuum insulation panel, and simultaneously ensure that the outer core plate 4 and the outer high-barrier gas film bag 5 cannot be separated under the condition that the outer high-barrier gas film bag 5 (taking two vacuum insulation layers as an example) is damaged, thereby causing the bulging of the vacuum insulation panel.
In order to conveniently and quickly load the vacuum insulation panel into the wrapped outer core plate 4 and to facilitate the processing and manufacturing of the wrapped outer core plate 4, a further preferred embodiment of the present invention is that each outer core plate 4 after the outer core plate 4 and the first outer core plate 4 is a wrapped outer core plate structure, an edge structure 4.1 is arranged at the edge of the wrapped outer core plate 4, the edge structure 4.1 is connected with the outer core plate 4, or the edge structure 4.1 and the outer core plate 4 form an integral structure. The specific structure can be according to actual processing demand, and accomplish machining efficiency high, process cost, sealed effectual can.
In order to ensure good heat insulation and fire prevention effects of the vacuum insulation panel and to reduce the manufacturing cost of the vacuum insulation panel, it is a further preferred embodiment of the present invention that the inner core plate 1, the outer core plate 4 and each outer core plate 4 after the first outer core plate 4 are made of one of glass fiber, meteorological silica, inorganic fiber plate or any combination thereof, and the high barrier gas film bag is made of a composite film containing glass fiber.
In order to avoid the damage to the surface of the vacuum insulation panel caused by external impact or scratch as much as possible and to make the surface have certain hardness, toughness and puncture resistance, a further preferable embodiment of the invention is that the surface puncture resistance strength of the outermost high-barrier gas film bag 5 is not less than 21N. In order to effectively improve the puncture strength of the outermost core sheet surface, the content of the fumed silica may be appropriately increased in the core sheet production material.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A processing technology of a vacuum heat insulation plate without fear of surface damage is characterized by comprising the following processing steps:
firstly, manufacturing an inner core plate of a vacuum insulation panel by a dry method, carding glass fibers, fumed silica, nano microporous materials and aerogel into a sheet layer by a carding machine, laying the sheet layer on a conveyor belt, conveying the sheet layer onto a cutting machine by the conveyor belt, cutting the sheet layer into a set specification by the cutting machine, putting the cut sheet layer into a mold cavity for multiple layers layer by layer, laying a filling layer between the layers, forming an air suction material mounting groove on the inner core plate through a mold, or processing the air suction material mounting groove on the inner core plate, placing the mold cavity provided with the multiple sheet layers and the filling layer under a hot-press molding machine, forming the multiple sheet layers and the filling layer into the inner core plate through the hot-press molding machine, and filling air suction materials into the mold pressure air suction material mounting groove;
or carding glass fiber, gas phase silicon dioxide, nanometer microporous material and aerogel by a carding machine, winding into glass fiber rolls, arranging the glass fiber rolls into glass fiber roll layers tightly, conveying the glass fiber roll layers onto a cutting machine by a conveyor belt, cutting the glass fiber roll layers into a set specification by the cutting machine, placing the cut sheet glass fiber roll layers into a mold cavity for multiple layers layer by layer, connecting the multiple sheet glass fiber roll layers into a whole by a glass fiber wire for a needling machine, forming an air suction material installation groove on an inner core plate through a mold, or processing an air suction material installation groove on the inner core plate, placing the glass fiber sheet roll layers with multiple layers connected into a whole and the mold cavity under a hot press molding machine, molding the multiple glass fiber roll layers into the inner core plate through the hot press molding machine, and installing an air suction material in the air suction material installation groove;
secondly, preparing a wrapped outer core plate outside the inner core plate by a wet method, namely preparing 0-2 parts by weight of a medium-alkali or alkali-free glass fiber chopped strand with the diameter of 1.5-9 mu m, mineral wool with the fiber diameter of 4-12 mu m, fumed silica, aerogel, solid viscose and mica powder by water according to the content of the medium-alkali glass fiber chopped strand of 0-25 parts by weight, the content of the mineral wool of 0-50 parts by weight, the content of the fumed silica of 0-5 parts by weight, the content of the aerogel of 0-5 parts by weight, the content of the solid viscose of 0-5 parts by weight and the content of the mica powder of 0-10 parts by weight, conveying the uniformly stirred slurry to a forming net for flattening, then rolling and drying the core plate to remove moisture, preparing a plane by high-pressure mold heating, and preparing the slurry by using water of a moisture-proof agent, rock powder and a radiation blocking agent, wherein the moisture-proof agent content is 0-2 parts by weight, The manufacturing method comprises the following steps of (1) attaching a moisture-proof agent, perlite powder, a radiation blocking agent and solid viscose to the surface of a formed outer core plate, then cutting and/or bonding a planar core plate to form a wrapped outer core plate with an edge structure, wherein a bonding layer is attached to the outer surface of the outermost wrapped outer core plate, or a viscose raw material is added into the raw material of the outermost wrapped outer core plate;
thirdly, manufacturing an inner high-barrier gas film bag and an outer high-barrier gas film bag, arranging five materials of a glass fiber braided layer, a nylon layer, an aluminum-plated PET plastic film layer, a PET plastic film layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer in any order, coating viscose between the layers, compounding the five materials of the glass fiber braided layer, the nylon layer, the aluminum-plated PET plastic film layer, the EVOH layer, the aluminum foil layer and the PE plastic film layer into the high-barrier gas film bag through a hot press in any order, and finally coating an adhesive layer on the inner surfaces of at least the inner high-barrier gas film bag and the outer high-barrier gas film bag;
fourthly, bagging and heat sealing, cutting the inner high-barrier air film bag manufactured in the third step into a set size, firstly laying the sheet-shaped inner high-barrier air film bag in a vacuum pumping chamber of vacuum pumping equipment, then placing an inner core plate filled with air suction materials on or under the sheet-shaped inner high-barrier air film bag, then closing the vacuumizing chamber to start butting the core board for vacuumizing treatment, after the vacuumizing treatment is finished, butting the flaky inner high-barrier gas film bag from the upper surface or the lower surface of the core board and partially overlapping and folding the flaky inner high-barrier gas film bag, and then carrying out hot-press sealing on the laminated inner high-barrier gas film bag, simultaneously, the length of the sheet-shaped inner high-barrier gas film bag is sealed with two ends of the inner core plate in a hot-pressing way, then the two ends are folded to the upper surface or the lower surface of the inner core plate and sealed in a hot-pressing way again to obtain an inner vacuum heat-insulating structure layer, and the overlapped parts of the inner high-barrier gas film bag are bonded together;
laying the flaky outer high-barrier gas film bag in a vacuumizing chamber of vacuumizing equipment, placing one surface of the wrapped outer core plate on or below the flaky outer high-barrier gas film bag, placing the inner vacuum heat-insulating structure layer on one surface of the outer core plate, fastening the other surface of the outer core plate with one surface of the outer core plate, closing the vacuumizing chamber to perform vacuumizing treatment on the outer core plate, transferring the flaky outer high-barrier gas film bag into another vacuumizing chamber after vacuumizing treatment is finished, overlapping and folding the flaky outer high-barrier gas film bag from the upper surface or the lower surface of the outer core plate, performing hot-press sealing on the flaky outer high-barrier gas film bag and two ends of the wrapped outer core plate, folding the two ends onto or lower surface of the wrapped outer core plate, performing hot-press sealing again to obtain a first outer vacuum heat-insulating structure layer, and performing hot-press sealing while arranging the outermost high-barrier gas film bag and the outer core plate, The overlapped parts of the outer high-barrier air film bags are bonded together, and the steps are repeated for a plurality of times to prepare the multi-layer outer vacuum heat-insulating structure layer.
2. The process for manufacturing a vacuum insulation panel without fear of surface damage according to claim 1, wherein in the step 4, the inner core panel is baked at 150-300 ℃ for 5-20 minutes and then placed in a high vacuum box for vacuum pumping, the vacuum pumping time is 3-20 minutes, and the vacuum degree in the vacuum chamber reaches 5 x 10-3Pa~3*100Pa。
3. The process for producing a vacuum insulation panel without fear of surface damage according to claim 2, wherein the temperature of vacuum lamination in the step 4 is 120 to 250 ℃ and the lamination time is 10 to 30 seconds.
4. The process for manufacturing a vacuum insulation panel without surface damage according to claim 1, wherein the vacuum insulation panel comprises at least two vacuum insulation structure layers, namely an inner vacuum insulation structure layer and at least one outer vacuum insulation structure layer wrapped outside the inner vacuum insulation structure layer, the inner vacuum insulation structure layer comprises an inner core plate, an installation groove for air suction material is arranged on the inner core plate, the air suction material is arranged in the installation groove, an inner high barrier air film bag is sleeved outside the inner core plate provided with the air suction material, and the inner high barrier air film bag provided with the inner core plate is vacuumized and heat sealed by high vacuum equipment to form the inner vacuum insulation structure layer; the outer vacuum heat insulation structure layer is made by an outer core plate and an outer high vacuum barrier film wrapped outside the outer core plate through vacuum pumping and heat sealing by high vacuum equipment; the inner high-barrier gas film bag and the outer high-barrier gas film bag are respectively formed by compounding five materials of a glass fiber woven layer, a nylon layer, an aluminized PET plastic film layer, a PET plastic film layer, an EVOH layer, an aluminum foil layer and a PE plastic film layer according to any sequence, and an adhesive layer is attached to the inner surface of the outer high-barrier gas film bag.
5. The processing technology of the vacuum heat insulation board without the fear of surface damage as claimed in claim 4, characterized in that the solid adhesive is one or a mixture of any of hot melt adhesive, pressure sensitive adhesive and tapioca flour, the solid adhesive accounts for 0-5% of the weight of the inner core board, the mica powder accounts for 0-20% of the weight of the inner core board, and the ratio of the total thickness of the lapping hot press molding layer and the filling layer in a natural state to the thickness of the core material after hot press molding is 3-5: 1.
6. The process for manufacturing a vacuum thermal insulation panel without surface damage according to claim 4, wherein the wrapped outer core comprises the raw materials of medium alkali or alkali-free glass fiber chopped strands with a diameter of 1.5-9 μm, mineral wool with a fiber diameter of 4-12 μm, fumed silica, aerogel, solid viscose and mica powder, the raw materials are mixed uniformly by wet method with water, and then the mixture is formed into an outer core, the outer core is manufactured by hot pressing, and the outer core is cut and/or bonded into the wrapped outer core with an edge structure, wherein the content of the medium alkali or alkali-free glass fiber chopped strands is 0-25 parts by weight, the content of the mineral wool is 0-50 parts by weight, the content of the fumed silica is 0-5 parts by weight, the content of the aerogel is 0-5 parts by weight, and the content of the solid viscose is 0-5 parts by weight, The content of the mica powder is 0-10 parts by weight, and the solid viscose is one or any mixture of hot melt viscose, pressure sensitive adhesive and cassava powder.
7. The processing technology of the vacuum heat insulation board without surface damage as claimed in claim 6, wherein the raw material composition of the wrapped outer core board further comprises a moisture-proof agent, perlite powder and a radiation blocking agent, the content of the moisture-proof agent is 0-2 parts by weight, the content of the perlite powder is 0-2 parts by weight, the content of the radiation blocking agent is 0-1 part by weight, and the moisture-proof agent, the perlite powder, the radiation blocking agent and the solid adhesive are attached to the surface of the molded outer core board.
8. The processing technology of the vacuum heat insulation plate without the fear of surface damage as claimed in claim 4, wherein the nylon of the nylon layer is biaxially oriented thickened nylon, and the thickness of the biaxially oriented thickened nylon is 12-35 um.
CN201910915265.7A 2019-09-26 2019-09-26 Processing technology of vacuum heat insulation plate without fear of surface damage Expired - Fee Related CN110792879B (en)

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CN112050029B (en) * 2020-09-07 2022-02-08 江南大学 Composite core material and preparation method and application thereof
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