阅读说明：本技术 不惧表面破损的真空绝热板材及加工工艺 (Vacuum heat-insulating plate without fear of surface damage and processing technology ) 是由 张桂萍 张海军 丁军良 刘文亮 杨汉卿 杨东 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种不惧表面破损的真空绝热板及其加工工艺,该真空绝热板包括内真空结构层和包裹在其外部的至少一层外真空结构层,内真空结构层由内芯板和包裹在其外部的高真空阻隔膜构成,内芯板内真空结构层由内芯板和包裹在其外部的高真空阻隔膜构成,内芯板由玻璃纤维等材料经梳理热压或分散湿法及真空工艺制备而成,内芯板与吸气材料一起装入高真空阻隔膜内,用高真空热封设备制成内真空结构层；外真空结构层由内真空结构加外芯板和包裹在其外部的高真空阻隔膜构成,外芯板由玻璃纤维等经湿法混合分散经真空成型工艺制成。该真空绝板具有保温效果好、安全轻便、施工简单、可开孔等特点；表面破损后不起鼓、不膨胀、不吸水、保留保温隔热性能好。(The invention discloses a vacuum heat-insulating plate without surface damage and a processing technology thereof, the vacuum heat-insulating plate comprises an inner vacuum structure layer and at least one outer vacuum structure layer wrapped outside the inner vacuum structure layer, the inner vacuum structure layer consists of an inner core plate and a high vacuum barrier film wrapped outside the inner core plate, the inner vacuum structure layer of the inner core plate consists of the inner core plate and the high vacuum barrier film wrapped outside the inner core plate, the inner core plate is prepared by materials such as glass fiber and the like through carding hot pressing or dispersion wet method and vacuum technology, the inner core plate and an air suction material are put into the high vacuum barrier film together, and the inner vacuum structure layer is prepared by high vacuum heat sealing equipment; 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.)

1. A vacuum heat insulation panel without surface damage is characterized by comprising 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, wherein the inner vacuum heat insulation structure layer comprises an inner core plate, an installation groove of a gas suction material is formed in 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 through 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, fumed silica, a nano microporous material and aerogel through a carding hot-pressing or a dispersion wet vacuum process; 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.

2. The vacuum insulation panel without surface damage as claimed in claim 1, wherein the inner core panel comprises a plurality of carded glass fibers, fumed silica and aerogel which are stacked and carded, and the carded glass fibers, the fumed silica and the aerogel are carded and lapped according to a certain proportion to form a hot-press molding layer; 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.

3. The vacuum insulation panel without surface damage as claimed in claim 2, wherein the solid adhesive is one or any mixture of hot melt adhesive, pressure sensitive adhesive and tapioca flour, the solid adhesive accounts for 0-5% of the weight of the core panel, the mica powder accounts for 0-20% of the weight of the core panel, and the ratio of the total thickness of the lapping and hot-pressing layer and the filling layer in a natural state to the thickness of the core material after hot-pressing is 3-5: 1.

4. The vacuum insulation panel without surface damage as claimed in claim 1, wherein the inner core panel comprises a plurality of stacked glass fiber, fumed silica, nano-porous material, aerogel roll layers, adjacent glass fiber, fumed silica, nano-porous material, aerogel roll layers are connected by a glass fiber staple needle punching method, and then are hot-pressed to form an inner core panel, and the inner core panel is provided with an installation groove for air suction material.

5. The vacuum insulation panel without surface damage as claimed in claim 1, wherein the wrapped outer core comprises 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 with water by a wet method, and then are subjected to web formation, rolling, moisture filtering and hot pressing to form the outer core, and the outer core is subjected to mold pressing and/or bonding to form the wrapped outer core with an edge structure, wherein the medium alkali or alkali-free glass fiber chopped strands comprise 0-25 parts by weight, the mineral wool comprises 0-50 parts by weight, the fumed silica comprises 0-5 parts by weight, the aerogel comprises 0-5 parts by weight, the solid viscose comprises 0-5 parts by weight and the mica powder comprises 0-10 parts by weight, the solid viscose is one or any mixture of hot melt viscose, pressure sensitive adhesive and cassava powder.

6. The vacuum insulation panel without surface damage as claimed in claim 5, wherein the wrapping type outer core panel further comprises moisture-proof agent, perlite powder and radiation blocking agent, 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 adhesive are attached to the surface of the molded outer core panel.

7. The vacuum insulation panel without surface damage of claim 1, wherein the nylon of the nylon layer is biaxially oriented and thickened nylon, and the biaxially oriented and thickened nylon has a thickness of 12-35 um.

8. A processing technology of a vacuum heat insulation plate without fear of surface damage is characterized by comprising the following processing steps:

a first step of manufacturing the inner core plate according to claim 3 or 4 by a dry method, carding glass fibers, fumed silica, nano-microporous materials and aerogel into sheet layers by a carding machine, laying the sheet layers on a conveyor belt, conveying the sheet layers onto a cutting machine, cutting the sheet layers into a set specification by the cutting machine, placing the cut sheet layers into a mold cavity layer by layer for multiple layers, laying a filling layer between the layers, forming a suction material mounting groove in the inner core plate through a mold, or processing a suction material mounting groove in the inner core plate, placing the mold cavity with the multiple sheet layers and the filling layer under a hot press molding machine, molding the multiple sheet layers and the filling layer together into the inner core plate through the hot press molding machine, and filling the suction material into the 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 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 an inner core plate through the hot press molding machine, and installing an air suction material in the air suction material installation groove;

secondly, preparing the wrapped outer core board of each layer as claimed in claim 5 or 6 except the inner core board by a wet method, preparing a slurry by 0-25 parts by weight of medium alkali or alkali-free glass fiber chopped strands with the diameter of 1.5-9 um, 0-50 parts by weight of mineral wool, 0-5 parts by weight of fumed silica, 0-5 parts by weight of aerogel, 0-5 parts by weight of solid viscose and 0-10 parts by weight of mica powder by the content of the medium alkali glass fiber chopped strands, conveying the uniformly stirred slurry to a forming net for flattening, then removing moisture by rolling and drying, then preparing a plane core board by high-temperature hot die pressing, and preparing the slurry by water of a moisture-proof agent, pearl rock powder and a radiation blocking agent, the manufacturing method comprises the following steps of (1) enabling the content of a moisture-proof agent to be 0-2 parts by weight, the content of perlite powder to be 0-2 parts by weight and the content of a radiation blocking agent to be 0-1 part by weight, enabling the moisture-proof agent, the perlite powder, the radiation blocking agent and solid viscose to be attached to the surface of a formed outer core plate, then enabling a planar core plate to be cut and/or bonded to form a wrapped outer core plate with an edge structure, attaching a bonding layer to the outer surface of the wrapped outer core plate at least on the outermost layer, or adding viscose raw materials into raw materials of the wrapped outer core plate at least on the outermost layer;

thirdly, the inner and outer high-barrier gas film bags according to claim 7 are manufactured by 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 by a hot press in any order, and finally coating an adhesive layer on at least the inner surfaces of the inner and outer high-barrier gas film bags;

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 the butt joint of the inner core plate for vacuumizing treatment, after the vacuumizing treatment is finished, in the vacuumizing process or transferring the vacuumizing process into another vacuum chamber, butt joint the flaky inner high-barrier gas film bag from the upper surface or the lower surface of the inner core plate, partially overlapping and folding the gas film bag, then carrying out hot-press sealing, simultaneously, the length of the sheet-shaped inner high-barrier gas film bag is sealed with the 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.

9. The process for manufacturing a vacuum insulation panel without surface damage according to claim 8, 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。

10. The process for producing a vacuum insulation panel without fear of surface damage according to claim 9, wherein the temperature of vacuum lamination in the step 4 is 120 to 250 ℃ and the lamination time is 10 to 30 seconds.

Technical Field

The invention relates to the technical field of heat-preservation, heat-insulation and fireproof plates, in particular to a vacuum heat-insulation plate free of surface damage and a processing technology thereof.

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 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, one of the technical schemes of the invention is to design a vacuum heat insulation plate without surface damage, the vacuum heat insulation plate 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 a 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 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.

In order to achieve the above object, a second technical solution of the present invention is to provide a processing method of a vacuum insulation panel without surface damage, the processing method comprising the following steps:

a first step of manufacturing the inner core plate according to claim 3 or 4 by a dry method, carding glass fibers, fumed silica, nano-microporous materials and aerogel into sheet layers by a carding machine, laying the sheet layers on a conveyor belt, conveying the sheet layers onto a cutting machine, cutting the sheet layers into a set specification by the cutting machine, placing the cut sheet layers into a mold cavity layer by layer for multiple layers, laying a filling layer between the layers, forming a suction material mounting groove in the inner core plate through a mold, or processing a suction material mounting groove in the inner core plate, placing the mold cavity with the multiple sheet layers and the filling layer under a hot press molding machine, molding the multiple sheet layers and the filling layer together into the inner core plate through the hot press molding machine, and filling the suction material into the 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 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 an inner core plate through the hot press molding machine, and installing an air suction material in the air suction material installation groove;

secondly, preparing the wrapped outer core board of each layer as claimed in claim 5 or 6 except the inner core board by a wet method, preparing a slurry by 0-25 parts by weight of medium alkali or alkali-free glass fiber chopped strands with the diameter of 1.5-9 um, 0-50 parts by weight of mineral wool, 0-5 parts by weight of fumed silica, 0-5 parts by weight of aerogel, 0-5 parts by weight of solid viscose and 0-10 parts by weight of mica powder by the content of the medium alkali glass fiber chopped strands, conveying the uniformly stirred slurry to a forming net for flattening, then removing moisture by rolling and drying, then preparing a plane core board by high-temperature hot die pressing, and preparing the slurry by water of a moisture-proof agent, pearl rock powder and a radiation blocking agent, the manufacturing method comprises the following steps of (1) enabling the content of a moisture-proof agent to be 0-2 parts by weight, the content of perlite powder to be 0-2 parts by weight and the content of a radiation blocking agent to be 0-1 part by weight, enabling the moisture-proof agent, the perlite powder, the radiation blocking agent and solid viscose to be attached to the surface of a formed outer core plate, then enabling a planar core plate to be cut and/or bonded to form a wrapped outer core plate with an edge structure, attaching a bonding layer to the outer surface of the wrapped outer core plate at least on the outermost layer, or adding viscose raw materials into raw materials of the wrapped outer core plate at least on the outermost layer;

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 the butt joint of the inner core plate for vacuumizing treatment, after the vacuumizing treatment is finished, in the vacuumizing process or transferring the vacuumizing process into another vacuum chamber, butt joint the flaky inner high-barrier gas film bag from the upper surface or the lower surface of the inner core plate, partially overlapping and folding the gas film bag, then carrying out hot-press sealing, simultaneously, the length of the sheet-shaped inner high-barrier gas film bag is sealed with the 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, simultaneously 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 vacuum compounding temperature in the step 4 is 120-250 ℃, and the compounding time is 10-30 seconds.

The invention has the advantages and beneficial effects that: the vacuum heat insulation plate without fear of surface damage has the characteristics of simple structure, good heat insulation effect, long service life, no fear of surface damage, no air leakage and no bulging after 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 plate; 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.