Edge-folding-free vacuum insulation panel preparation process

Abstract

The invention discloses an edge-folding-free vacuum heat insulation plate preparation process. The process comprises the following steps that firstly, heat sealing pieces are arranged at the corner positions of core materials; secondly, the core material is placed in the blocking bag through an opening of the blocking bag; step 3, vacuumizing the barrier bag, so that gas in the core material is extracted from an opening of the barrier bag; fourthly, after vacuumizing is completed, the opening of the barrier bag is subjected to heat sealing; 5, the semi-finished board is heated, so that the upper barrier film and the lower barrier film at the virtual edge positions are heat-sealed together, and the heat-sealing piece, the upper barrier film and the lower barrier film are heat-sealed together; and 6, the inner sealing edge or the outer sealing edge is cut around the core material, and the vacuum insulation panel with the final sealing edge is formed after the inner sealing edge or the outer sealing edge is cut. The heat-sealing pieces are arranged at the corners of the core material, so that the problem that the corners of the vacuum insulated panel are prone to air leakage is effectively solved, the edges are shrunk after cutting, narrow sealing edges are formed, and edge folding is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum insulation panels, and in particular to a preparation process of a vacuum insulation panel without edge folding. Background Art

[0002] Vacuum insulation panel is a highly efficient insulation material. It is composed of a filling core material and a vacuum protective surface layer. It is made through vacuum packaging technology, which effectively avoids heat transfer caused by air convection, thereby greatly reducing thermal conductivity.

[0003] After the vacuum insulation panel is manufactured, it is usually necessary to fold the excess edge leaves. After folding, the vacuum insulation panel forms a regular-shaped product, which is convenient for use. During the folding process of the vacuum insulation panel, the surface of the barrier bag at the folding position of the edge leaves is easily damaged, thereby affecting the performance of the vacuum insulation panel. At the same time, the folding of the vacuum insulation panel requires a lot of manpower and material resources, and the cost is high. Summary of the invention

[0004] Based on the above-mentioned problems existing in the prior art, the purpose of the embodiments of the present application is to provide a process for preparing a vacuum insulation panel without folding edges, by arranging heat-sealing parts at the corners of the core material, so that after the vacuum insulation panel is manufactured, during the baking and heating process, the heat-sealing parts are heat-sealed together with the inner side of the barrier bag, thereby increasing the heat-sealed volume at the corners of the vacuum insulation panel, effectively reducing the problem of air leakage at the corners of the vacuum insulation panel, and the edges are shrunk after cutting to form a narrower sealed edge, which does not require folding edges.

[0005] The technical solution adopted by the present application to solve the technical problem is: a process for preparing a vacuum insulation panel without folding, comprising the following steps:

[0006] Step 1: a heat seal is arranged at a corner of the core material, and the heat seal can be heat-sealed with the inner side of the barrier bag;

[0007] Step 2: placing the core material with the heat-sealed piece at the corner into the barrier bag through the opening of the barrier bag;

[0008] Step 3, evacuating the barrier bag so that the gas in the core material is extracted from the opening of the barrier bag;

[0009] Step 4: After the vacuum is drawn, the opening of the barrier bag is heat-sealed to obtain a semi-finished plate, wherein the semi-finished plate has an outer sealing edge and a virtual edge, wherein the virtual edge is located between the outer sealing edge and the core material, and the inner side of the virtual edge is bonded to the heat-sealing member;

[0010] Step 5, heating the semi-finished plate to heat-seal the upper barrier film and the lower barrier film at the virtual edge together, and at the same time, heat-seal the heat-sealing member, the upper barrier film and the lower barrier film together, so that the virtual edge forms an inner sealed edge;

[0011] Step six, cutting the inner edge or the outer edge around the core material, and forming a vacuum insulation panel with a final edge after cutting the inner edge or the outer edge.

[0012] Furthermore, the heat-sealing member is made of polyethylene material; a heat-sealing layer is arranged on the inner side of the barrier bag, and the heat-sealing layer is made of polyethylene material.

[0013] Furthermore, the heat-sealing member is a polyethylene sheet, which is transversely inserted at the corner of the core material, and the thickness of the polyethylene sheet is 25 μm-200 μm.

[0014] Furthermore, in step one, a heat seal is also provided at the side of the core material.

[0015] Furthermore, in step one, the heat-sealing member is a polyethylene film, and the polyethylene film is wrapped around the side of the core material so that the polyethylene film is wrapped around the side position and the corner position of the core material.

[0016] Furthermore, before placing the core material in the barrier bag, the adsorbent is placed on the core material, and then the core material and the adsorbent are placed in the barrier bag together.

[0017] Furthermore, in step five, the semi-finished board is placed in a baking device for baking and heating, the baking time is 10 minutes to 60 minutes, and the baking temperature is 110°C to 180°C.

[0018] Furthermore, the baking time is 30 minutes and the baking temperature is 130°C.

[0019] Furthermore, in step five, the semi-finished plate is placed in a baking tunnel furnace for baking, pressurization and heat sealing.

[0020] Furthermore, the baking tunnel furnace includes a base, a preheating zone and a hot pressing zone. The preheating zone and the hot pressing zone are arranged on the base. The preheating zone preheats the semi-finished plates, and the hot pressing zone presses and bakes the semi-finished plates. The baking time of the hot pressing zone is 10min-60min, the baking temperature is 110℃-180℃, and the pressurization strength is above 0.1Mpa.

[0021] Furthermore, a first conveying roller for conveying the semi-finished plate is arranged in the preheating zone.

[0022] Furthermore, a correction mechanism is provided in the preheating zone, the correction mechanism comprises a first correction plate and a second correction plate, the first correction plate and the second correction plate can be close to each other or away from each other, and the first correction plate and the second correction plate are close to each other to correct the semi-finished plate.

[0023] Furthermore, the hot pressing zone includes a front pressing roller, which includes an upper front pressing roller and a lower front pressing roller. The upper front pressing roller is in contact with an upper barrier film located on the upper side of the core material, and the lower front pressing roller is in contact with a lower barrier film located on the lower side of the core material. The upper front pressing roller and the lower front pressing roller are distributed in an eight-shaped shape so that the molten heat-sealing adhesive moves toward the middle.

[0024] Furthermore, the hot pressing zone also includes a rear side pressing roller, which is located behind the front side pressing roller, and the rear side pressing roller includes an upper rear side pressing roller and a lower rear side pressing roller, the upper rear side pressing roller is in contact with the upper side of the virtual edge, and the lower rear side pressing roller is in contact with the lower side of the virtual edge.

[0025] Furthermore, a second conveying roller and a third conveying roller for conveying the semi-finished plate are arranged in the hot pressing zone, the second conveying roller is attached to the upper side of the semi-finished plate, and the third conveying roller is attached to the lower side of the semi-finished plate.

[0026] Furthermore, the hot pressing zone includes a vertical zone and a horizontal zone, both of which are provided with front pressing rollers and rear pressing rollers, the vertical zone presses and heat-seals the left and right sides of the semi-finished sheet material, and the horizontal zone presses and heat-seals the front and back sides of the semi-finished sheet material.

[0027] Furthermore, the barrier bag comprises an upper barrier film and a lower barrier film, and a polyethylene layer is provided inside the upper barrier film and the lower barrier film, and the thickness of the polyethylene layer is 25 μm-90 μm.

[0028] Furthermore, glue is applied to the corners of the vacuum insulation panels formed after cutting. The glue is a two-component polyurethane glue, so that a colloid protective layer is formed at the corners of the vacuum insulation panels.

[0029] Furthermore, the final edge banding width is 5mm-25mm.

[0030] The beneficial effect of the present application is that during production, a heat seal is first arranged at the corner of the core material, so that after the semi-finished board is made, when the semi-finished board is heated, the upper barrier film at the upper part of the virtual edge and the lower barrier film at the lower part of the virtual edge are heat-sealed together, and at the same time, the heat seal will melt. Since the heat seal is arranged at the corner of the core material and is located on the inner side of the virtual edge, the melted heat seal forms a heat seal adhesive, so that there is more heat seal adhesive at the corner of the vacuum insulation board, the heat seal volume is increased, and the corner of the vacuum insulation board is not easy to leak. Finally, the inner sealed edge is cut to form a vacuum insulation board with a narrower final sealed edge. The vacuum insulation board with a narrower final sealed edge does not need to be folded, thus achieving fold-free edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure when the core material is placed in a barrier bag in this application;

[0032] Figure 2This is a schematic diagram of the connection between the polyethylene sheet and the sheet-like core material in this application;

[0033] Figure 3 This is a structural schematic diagram of the semi-finished plate cutting process in this application;

[0034] Figure 4 This is a schematic diagram of the connection between the polyethylene film and the core material in this application;

[0035] Figure 5 This is a schematic diagram of the structure in which the semi-finished board is placed in a baking device for baking in this application;

[0036] Figure 6 This is a schematic diagram of the structure of the baking tunnel furnace in this application;

[0037] Figure 7 This is a schematic diagram of the structure of pressurized heat sealing of semi-finished panels in a baking tunnel furnace in this application.

[0038] Description of Reference Numerals

[0039] Core material 1, heat sealing part 2, polyethylene sheet 21, polyethylene film 22, barrier bag 3, upper barrier film 31, lower barrier film 32, upper barrier film 33, lower barrier film 34, semi-finished plate 4, outer edge sealing 41, virtual edge 42, inner edge sealing 43, final edge sealing 44, adsorbent 5, baking equipment 6, baking tunnel furnace 7, preheating zone 71, first conveying roller 711, first correction plate 712, second correction plate 713, hot pressing zone 72, front side pressing roller 721, upper front side pressing roller 7211, lower front side pressing roller 7212, rear side pressing roller 722, upper rear side pressing roller 7221, lower rear side pressing roller 7222, second conveying roller 723, third conveying roller 724, vertical zone 725, horizontal zone 726. DETAILED DESCRIPTION

[0040] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0041] like Figures 1 to 7 As shown, a process for preparing a vacuum insulation panel without folding edge of the present invention comprises the following steps:

[0042] Step 1: a heat seal 2 is arranged at the corner of the core material 1, and the heat seal 2 can be heat-sealed with the inner side of the barrier bag 3; Step 2: the core material 1 with the heat seal 2 at the corner is placed in the barrier bag 3 through the opening of the barrier bag 3; Step 3: the barrier bag 3 is evacuated so that the gas in the core material 1 is extracted from the opening of the barrier bag 3; Step 4: after the vacuum is evacuated, the opening of the barrier bag 3 is heat-sealed to obtain a semi-finished plate 4, which has an outer sealed edge 41 and a virtual edge 42, and the virtual edge 42 is located at the outer sealed edge 41. The inner side of the virtual edge 42 is attached to the heat-sealing component 2 between the edge 41 and the core material 1; step five, heating the semi-finished sheet material 4, so that the upper barrier film 31 and the lower barrier film 32 at the position of the virtual edge 42 are heat-sealed together, and at the same time, the heat-sealing component 2 is heat-sealed with the upper barrier film 31 and the lower barrier film 32, so that the virtual edge 42 forms an inner sealing edge 43; step six, cutting the inner sealing edge 43 or the outer sealing edge 41 around the core material 1, and the inner sealing edge 43 or the outer sealing edge 41 is cut to form a vacuum insulation panel with a final sealing edge 44.

[0043] In this way, the present invention relates to a preparation process of a vacuum insulation panel without folding edge. During the production, a heat-sealing member 2 is first arranged at the corner position of the core material 1, so that after the semi-finished plate 4 is made, when the semi-finished plate 4 is heated, the upper barrier film 31 on the upper part of the virtual edge 42 and the lower barrier film 32 on the lower part of the virtual edge 42 are heat-sealed together. At the same time, the heat-sealing member 2 will melt. Since the heat-sealing member 2 is arranged at the corner position of the core material 1 and is located on the inner side of the virtual edge 42, the melted heat-sealing member 2 forms a heat-sealing glue, so that there is more heat-sealing glue at the corner position of the vacuum insulation panel, the heat-sealing volume is increased, and the corner position of the vacuum insulation panel is not easy to leak. Finally, the inner sealing edge 43 is cut to form a vacuum insulation panel with a narrower final sealing edge 44. The vacuum insulation panel with a narrower final sealing edge 44 does not need to fold edges, thereby achieving folding-free.

[0044] After the traditional vacuum insulation panel is manufactured, the upper barrier film 31 and the lower barrier film 32 are easily wrinkled together at the corner of the vacuum insulation panel after being attached, so that a small tunnel will be generated at the corner. If it is directly baked and cut to a narrow edge, the vacuum insulation panel will easily leak due to the existence of the small tunnel. To address this problem, in this application, a heat seal 2 is provided at the corner of the core material 1. The heat seal 2 melts after heating to form a heat seal adhesive, so that the heat seal adhesive will enter the small tunnel and finally fill the small tunnel, so that the corner of the vacuum insulation panel is not easy to leak after baking and cutting.

[0045] In this embodiment, the heat-sealing member 2 is made of polyethylene; a heat-sealing layer is provided inside the barrier bag 3, and the heat-sealing layer is made of polyethylene. Since the material of the heat-sealing member 2 is consistent with that of the heat-sealing layer, after heating, the heat-sealing member 2 is easily heat-sealed with the upper barrier film 31, and the heat-sealing member 2 is easily heat-sealed with the lower barrier film 32, so that the corners of the vacuum insulation panel are not easy to leak.

[0046] like Figure 1 and Figure 2 As shown, specifically, the heat seal member 2 is a polyethylene sheet 21, which is inserted horizontally at the corner of the core material 1. If the core material 1 can be a sheet-like core material 1, when in use, the polyethylene sheet 21 can be quickly inserted into the sheet-like core material 1, so that the polyethylene sheet 21 is located between the upper and lower adjacent core materials 1, so that the upper and lower core materials 1 fix the polyethylene sheet 21, and the overall operation is convenient, which is convenient for bagging the core material 1. The polyethylene sheet 21 can be 25μm-200μm thick, preferably 40μm.

[0047] In another embodiment, if Figure 4 As shown, in step 1, a heat seal 2 is also arranged at the side of the core material 1. Specifically, the heat seal 2 is a polyethylene film 22. In step 1, the polyethylene film 22 is used to wrap around the side of the core material 1, so that the polyethylene film 22 is wrapped around the side and corner of the core material 1. In this way, when the heat seal 2 is arranged on the core material 1, it is only necessary to wrap the polyethylene film 22 around the side of the core material 1, and the wrapping speed is fast and the wrapping is convenient.

[0048] Furthermore, before placing the core material 1 in the barrier bag 3, the adsorbent 5 is placed on the core material 1, and then the core material 1 and the adsorbent 5 are placed in the barrier bag 3 together. By providing the adsorbent 5, after the vacuum insulation panel is manufactured, the adsorbent 5 absorbs the gas remaining in the core material 1 of the vacuum insulation panel, thereby improving the insulation effect of the vacuum insulation panel.

[0049] As an embodiment, in step 5, the semi-finished plate 4 is placed in a baking device 6 for baking and heating, the baking time is 10min-60min, and the baking temperature is 110℃-180℃, so that the heat sealing layer and the heat sealing member 2 are better heat-sealed together. Preferably, the baking time is 30min, and the baking temperature is 130℃.

[0050] As another embodiment, in step 5, the semi-finished plate 4 is placed in a baking tunnel furnace 7 for baking, pressurization and heat sealing. By pressurizing and heat sealing the semi-finished plate 4, the small tunnels are pressurized, thereby eliminating the small tunnels, making the side of the vacuum insulation panel less likely to leak, and further making the corner of the vacuum insulation panel less likely to leak.

[0051] like Figure 6 and Figure 7As shown, further, the baking tunnel furnace 7 includes a base, a preheating zone 71 and a hot pressing zone 72. The preheating zone 71 and the hot pressing zone 72 are arranged on the base. The preheating zone 71 preheats the semi-finished plate 4, and the hot pressing zone 72 presses and bakes the semi-finished plate 4. The baking time of the hot pressing zone 72 is 10min-60min, the baking temperature is 110℃-180℃, and the pressurization strength is above 0.1Mpa. After the semi-finished plate 4 is placed in the baking tunnel furnace 7, the preheating zone 71 first preheats the semi-finished plate 4 so that the heat seal 2 and the heat seal layer melt, and then the semi-finished plate 4 is transported to the hot pressing zone 72, and the hot pressing zone 72 presses the semi-finished plate 4 to eliminate the small tunnels.

[0052] In this embodiment, a first conveying roller 711 for conveying the semi-finished plate 4 is provided in the preheating zone 71, and a correction mechanism is provided in the preheating zone 71. The correction mechanism includes a first correction plate 712 and a second correction plate 713. The first correction plate 712 and the second correction plate 713 can approach each other or move away from each other. The first correction plate 712 and the second correction plate 713 approach each other to correct the semi-finished plate 4. For example, the first correction plate 712 and the second correction plate 713 are respectively connected to a cylinder. Under the action of the cylinder, the first correction plate 712 and the second correction plate 713 are close to each other or move away from each other. The first correction plate 712 and the second correction plate 713 are parallel to each other. The first correction plate 712 and the second correction plate 713 approach each other to push the side of the semi-finished plate 4 to correct the semi-finished plate 4.

[0053] By providing the first conveying roller 711 , it is convenient to convey and bake the semi-finished sheet material 4 . By providing the correction mechanism, it is possible to correct the semi-finished sheet material 4 , so that the hot pressing zone 72 can pressurize and heat-seal the semi-finished sheet material 4 .

[0054] Specifically, the hot pressing zone 72 includes a front pressing roller 721, which includes an upper front pressing roller 7211 and a lower front pressing roller 7212. The upper front pressing roller 7211 is attached to the upper barrier film 33 located on the upper side of the core material 1, and the lower front pressing roller 7212 is attached to the lower barrier film 34 located on the lower side of the core material 1. The upper front pressing roller 7211 and the lower front pressing roller 7212 are distributed in an eight-shaped shape so that the molten heat-sealing adhesive moves closer to the middle.

[0055] After the semi-finished sheet 4 is formed, the portion where the upper barrier film 31 is attached to the outer side of the core material 1 forms the upper barrier film 33, and the portion where the lower barrier film 32 is attached to the outer side of the core material 1 forms the lower barrier film 34. After the semi-finished sheet 4 enters the hot pressing zone 72, the upper front pressing roller 7211 abuts against the upper barrier film 33, and the lower front pressing roller 7212 abuts against the lower barrier film 34. Since the upper front pressing roller 7211 and the lower front pressing roller 7212 are arranged in an eight-shaped shape, the upper front pressing roller 7211 and the lower front pressing roller 7212 rotate to squeeze the molten heat-sealing adhesive to the middle position, thereby moving the heat-sealing adhesive toward the direction of the small tunnel.

[0056] In some examples, the hot pressing zone 72 further includes a rear pressing roller 722, which is located behind the front pressing roller 721. The rear pressing roller 722 includes an upper rear pressing roller 7221 and a lower rear pressing roller 7222. The upper rear pressing roller 7221 is in contact with the upper side of the virtual edge 42, and the lower rear pressing roller 7222 is in contact with the lower side of the virtual edge 42. By providing the rear pressing roller 722, after the heat sealant moves toward the direction of the small tunnel, the upper rear pressing roller 7221 and the lower rear pressing roller 7222 respectively squeeze the upper and lower sides of the virtual edge 42, thereby eliminating the small tunnel.

[0057] In the hot pressing zone 72 of this embodiment, a second conveying roller 723 and a third conveying roller 724 are provided to convey the semi-finished plate 4. The second conveying roller 723 is attached to the upper side of the semi-finished plate 4, and the third conveying roller 724 is attached to the lower side of the semi-finished plate 4. The second conveying roller 723 and the third conveying roller 724 rotate in opposite directions, so as to convey the semi-finished plate 4, and the front pressing roller 721 and the rear pressing roller 722 can stably pressurize the side of the semi-finished plate 4.

[0058] In order to pressurize and heat-seal the four sides of the semi-finished sheet 4, the hot pressing area 72 includes a vertical area 725 and a horizontal area 726. Both the vertical area 725 and the horizontal area 726 are provided with a front pressing roller 721 and a rear pressing roller 722. The vertical area 725 pressurizes and heat-seals the left and right sides of the semi-finished sheet 4, and the horizontal area 726 pressurizes and heat-seals the front and back sides of the semi-finished sheet 4. In this way, the left and right sides of the semi-finished sheet 4 are pressurized and heat-sealed in the vertical area 725, and the front and back sides of the semi-finished sheet 4 are pressurized and heat-sealed in the horizontal area 726. Finally, the four sides of the semi-finished sheet 4 are pressurized and heat-sealed, so that the vacuum insulation panel is not easy to leak. A pushing and positioning mechanism can be set between the vertical area 725 and the horizontal area 726 to push the semi-finished sheet 4 in the vertical area 725 to the horizontal area 726.

[0059] Furthermore, the barrier bag 3 includes an upper barrier film 31 and a lower barrier film 32, and a polyethylene layer is provided inside the upper barrier film 31 and the lower barrier film 32, and the thickness of the polyethylene layer is 25 μm-90 μm. The thickness of the polyethylene layer is preferably 80 μm, so that the thickness of the heat-sealing layer is thicker, and the heat-sealing effect of the upper barrier film 31 and the lower barrier film 32 is better.

[0060] In order to further prevent air leakage at the corners of the vacuum insulation panels, the corners of the vacuum insulation panels formed after cutting are infiltrated with glue to form a colloid protective layer at the corners of the vacuum insulation panels. In this way, an elastic and soft solidified colloid protective layer is formed on the surface of the barrier bag 3. The solidified colloid protective layer can improve the mechanical strength of the barrier bag 3 of the vacuum insulation panel and increase the service life of the vacuum insulation panel. Preferably, the glue is a polyurethane two-component glue, which is a two-component polyurethane adhesive. It is the most important category of polyurethane adhesives, with a wide range of uses and large dosage. It is usually composed of two components, A and B, which are packaged separately and can be prepared in a certain proportion before use. Component A (main agent) is a hydroxyl component, and component B (curing agent) is a component containing free isocyanate groups. Some main agents are polyurethane prepolymers with terminal NCO, and the curing agent is a low molecular weight polyol or polyamine. Component A and component B are mixed in a certain proportion to form a polyurethane resin. The polyurethane two-component adhesive makes the corner structure of the vacuum insulation panel dense, which can effectively reduce air leakage and effectively reduce damage to the vacuum insulation panel.

[0061] In this embodiment, the width of the final edge seal 44 is 5 mm-25 mm, so that the width of the final edge seal 44 is narrower and the edge folding is unnecessary, thus achieving the goal of edge folding-free.

[0062] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A process for preparing a vacuum insulation panel without folding, characterized in that: The following steps are involved: Step 1: a heat seal is arranged at a corner of the core material, and the heat seal can be heat-sealed with the inner side of the barrier bag; Step 2: placing the core material with the heat-sealed piece at the corner into the barrier bag through the opening of the barrier bag; Step 3, evacuating the barrier bag so that the gas in the core material is extracted from the opening of the barrier bag; Step 4: After the vacuum is drawn, the opening of the barrier bag is heat-sealed to obtain a semi-finished plate, wherein the semi-finished plate has an outer sealing edge and a virtual edge, wherein the virtual edge is located between the outer sealing edge and the core material, and the inner side of the virtual edge is bonded to the heat-sealing member; Step 5, heating the semi-finished plate to heat-seal the upper barrier film and the lower barrier film at the virtual edge together, and at the same time, heat-seal the heat-sealing member, the upper barrier film and the lower barrier film together, so that the virtual edge forms an inner sealed edge; Step six, cutting the inner edge or the outer edge around the core material, and forming a vacuum insulation panel with a final edge after cutting the inner edge or the outer edge.

2. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: The heat sealing piece is made of polyethylene material; a heat sealing layer is arranged on the inner side of the barrier bag, and the heat sealing layer is made of polyethylene material.

3. The process for preparing the vacuum insulation panel without folding edge according to claim 1, characterized in that: The heat-sealing piece is a polyethylene sheet, which is transversely inserted at the corner of the core material and has a thickness of 25 μm-200 μm.

4. The process for preparing the vacuum insulation panel without folding edge according to claim 1, characterized in that: In step one, the heat-sealing member is a polyethylene film, and the polyethylene film is wrapped around the side of the core material so that the polyethylene film is wrapped around the side position and the corner position of the core material.

5. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: Before placing the core material in the barrier bag, the adsorbent is placed on the core material, and then the core material and the adsorbent are placed in the barrier bag together.

6. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: In step five, the semi-finished plate is placed in a baking device for baking and heating. The baking time is 10 minutes to 60 minutes and the baking temperature is 110° C. to 180° C.

7. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: In step five, the semi-finished sheet material is placed in a baking tunnel furnace for baking, pressurization and heat sealing; the baking tunnel furnace includes a base, a preheating zone and a hot pressing zone, the preheating zone and the hot pressing zone are arranged on the base, the preheating zone preheats the semi-finished sheet material, and the hot pressing zone pressurizes and bakes the semi-finished sheet material, the baking time of the hot pressing zone is 10min-60min, the baking temperature is 110℃-180℃, and the pressurization strength is above 0.1Mpa.

8. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: The barrier bag comprises an upper barrier film and a lower barrier film. A polyethylene layer is arranged on the inner side of the upper barrier film and the lower barrier film. The thickness of the polyethylene layer is 25 μm-90 μm.

9. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: The corners of the vacuum insulation panels formed after cutting are glued, and the glue is a polyurethane two-component glue, so that a colloid protective layer is formed at the corners of the vacuum insulation panels.

10. The process for preparing the edge-free vacuum insulation panel according to claim 1, characterized in that: The final edge banding width is 5mm-25mm.

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