Novel fireproof file box, file box and fireproof packaging box material and production process thereof

Abstract

The invention discloses a novel fireproof file box, file box and fireproof packaging box material and a production process thereof, and relates to the technical field of flame-retardant fireproof materials. The material is formed by compounding an acid-free paper layer on the inner side, an aluminum foil protection layer in the middle, a flame-retardant thermal insulation layer and a kraft paper printing layer on the outer side. The novel fireproof file box, file box and fireproof packaging box material is prepared by adopting a four-layer composite structure, the flame-retardant heat-insulating layer has the characteristics of flame retardance, self-extinguishing and cooling, the file box is endowed with excellent flame retardance, the aluminum foil protective layer adopts aluminum foil with the thickness of 0.07-0.20 mm, has the heat radiation reflection or heat conduction characteristic, can uniformly dissipate heat, and is high in fireproof performance. When the file box is directly burnt by open fire, the innermost acid-free paper layer can be protected to be stable for a long time and not carbonized or discolored, the kraft paper printing layer is thinner in thickness, better in fineness and beneficial to printing, and meanwhile, the mechanical property of the material can be enhanced through the four-layer composite structure.

Description

Technical Field

[0001] The present invention relates to the technical field of flame - retardant and fire - resistant materials, and specifically to a new type of fire - resistant material for file boxes, file cabinets and fire - resistant packaging boxes and its production process. Background Art

[0002] File boxes are containers for various government agencies and unit file management departments to organize, bind and store documents. They are important carriers of information resources, and their safety management is crucial. Whether it is government administrative documents, business secrets of enterprises, or research materials of scientific research institutions, they all rely on files for long - term preservation and inheritance. There are often a large number of precious and historically significant documents in the file room. They are key witnesses in the process of social development. Once damaged, the losses are incalculable. Traditional file box materials are mainly divided into cardboard, acid - free paper and polyvinyl chloride. Materials such as cardboard are easily affected by humid air and are prone to problems such as mildew and insect infestation. Polyvinyl chloride is a flammable material and is extremely easy to be damaged during transportation and use, resulting in waste. It is also not environmentally friendly and not suitable for long - term preservation. Acid - free paper, although insect - proof and moth - proof, is not fire - resistant. Therefore, there is a need for file boxes and file cabinets with good fire - prevention effects in the market. Currently, the mainstream high - temperature resistant and heat - insulating material is aluminum silicate fiber, but its dust is harmful to human health. Persistent mineral fiber has a potential risk of carcinogenesis to the human body and also causes certain harm to the environment.

[0003] Therefore, we propose a new type of fire - resistant material for file boxes, file cabinets and fire - resistant packaging boxes and its production process to solve the problems raised above.

[0004] The above - disclosed information in this background art is only used to increase the understanding of the background art of the present invention. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a new type of fire - resistant material for file boxes, file cabinets and fire - resistant packaging boxes and its production process to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A new type of fire - resistant material for file boxes, file cabinets and fire - resistant packaging boxes, the material is composed of an inner acid - free paper layer, an intermediate aluminum foil protective layer, a flame - retardant and heat - insulating layer, and an outer kraft paper printing layer. The flame - retardant and heat - insulating layer material is one of alumina fiber paper, ceramic fiber paper, calcium phosphate fiber paper, and basalt fiber paper.

[0007] Preferably, the thickness of the acid - free paper layer is not less than 0.25 mm, and the gram weight is 250 g / m 2 ~370 g / m 2 .

[0008] Preferably, the thickness of the aluminum foil protective layer is 0.07 mm to 0.20 mm, and the thickness of the flame retardant and heat insulation layer is 1.2 mm to 3.2 mm.

[0009] Preferably, the thickness of the kraft paper printing layer is 0.10 mm to 0.25 mm, and the gram weight is 100 g / m 2 ~250 g / m 2 .

[0010] Preferably, the flame retardant and heat insulation layer, the inner acid-free paper layer, the aluminum foil protective layer, and the kraft paper printing layer are bonded together by a halogen-free flame retardant adhesive.

[0011] Preferably, the halogen-free flame retardant adhesive is one of phenolic resin adhesives, epoxy resin adhesives, and polyurethane adhesives.

[0012] The present invention also provides a production process for a novel fireproof file box, file cabinet, and fireproof packing box material as described above, which includes the following steps:

[0013] Step 1: Use a high-speed dry laminator to laminate the aluminum foil and the flame retardant and heat insulation layer at a temperature of 95 °C and a pressure of 0.4 MPa, with a lamination speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a coating amount of 120 g / m 2 , a coating speed of 20 m / min, and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame retardant and heat insulation layer;

[0014] Step 2: Use a hydraulic cold press to laminate the double-layer structure and the acid-free paper through a cold pressing process, maintaining a pressure of 0.5 MPa at room temperature for 5 min to form a three-layer structure of acid-free paper layer - aluminum foil - flame retardant and heat insulation layer;

[0015] Step 3: Use a high-speed dry laminator to laminate the three-layer structure and the kraft paper printing layer at a temperature of 105 °C and a pressure of 0.3 MPa, and use a roll transfer coater to coat the adhesive, with an adhesive amount of 100 g / m 2 , to form a four-layer structure of acid-free paper layer - aluminum foil - flame retardant and heat insulation layer - kraft paper printing layer.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention uses a four-layer composite structure to prepare a novel fireproof file box, file cabinet, and fireproof packing box material. Among them, the flame retardant and heat insulation layer has the characteristics of being difficult to burn, self-extinguishing, and cooling down, endowing the file box with excellent flame retardant performance. The aluminum foil protective layer uses aluminum foil with a thickness of 0.07 mm to 0.20 mm, which has the characteristics of heat radiation reflection or heat conduction and can dissipate heat evenly. When an open flame directly burns the file box, it can protect the innermost acid-free paper layer from carbonization and discoloration for a long time. The kraft paper printing layer is thinner and has better fineness, which is conducive to printing. At the same time, the four-layer composite structure can enhance the mechanical properties of the material.

[0018] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent by reference to the following detailed description. Detailed Embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] A novel fireproof file box, file cabinet, and fireproof packaging box material provided by the present invention is composed of an inner acid-free paper layer, an intermediate aluminum foil protective layer, a flame-retardant and heat-insulating layer, and an outer kraft paper printing layer. The flame-retardant and heat-insulating layer material is one of alumina fiber paper, ceramic fiber paper, calcium phosphate fiber paper, and basalt fiber paper.

[0021] The thickness of the acid-free paper layer is not less than 0.25 mm, and the grammage is 250 g / m 2 ~370 g / m 2 .

[0022] The thickness of the aluminum foil protective layer is 0.07 mm to 0.20 mm;

[0023] The thickness of the flame-retardant and heat-insulating layer is 1.2 mm to 3.2 mm;

[0024] The thickness of the kraft paper printing layer is 0.10 mm to 0.25 mm, and the grammage is 100 g / m 2 ~250 g / m 2 .

[0025] The flame-retardant and heat-insulating layer, the inner acid-free paper layer, the aluminum foil protective layer, and the kraft paper printing layer are bonded by a halogen-free flame-retardant adhesive.

[0026] The halogen-free flame-retardant adhesive is one of phenolic resin adhesives, epoxy resin adhesives, and polyurethane adhesives.

[0027] The present invention also provides a production process for the above-mentioned novel fireproof file box, file cabinet, and fireproof packaging box material, including the following steps:

[0028] Step 1: Composite the aluminum foil and the flame-retardant and heat-insulating layer at a temperature of 95 °C and a pressure of 0.4 MPa, with a composite speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a dosage of 120 g / m 2, coating speed is 20 m / min, initial curing time is 5 s, forming a double-layer structure of aluminum foil - flame-retardant heat-insulating layer;

[0029] Step 2: Compounding the double-layer structure with acid-free paper through a cold pressing process, maintaining a pressure of 0.5 MPa at room temperature for 5 min, forming a three-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer;

[0030] Step 3: Compounding the three-layer structure and kraft paper printing layer at a temperature of 105 °C and a pressure of 0.3 MPa, using a roll transfer coater to coat the adhesive, with an adhesive amount of 100 g / m 2 , forming a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer - kraft paper printing layer.

[0031] Among them, the aluminum foil is subjected to plasma activation using a plasma processor to enhance the wettability of the adhesive; the surface of the kraft paper is passivated.

[0032] Finally, the roll pressing equipment on the production line continuously rolls and presses the compounded material to ensure uniform thickness and improve the quality stability of the product.

[0033] Among them, the halogen-free flame-retardant adhesive adopts the following basic formula: waterborne polyurethane resin 100 phr, expanded graphite 15 phr, nano-level APP 8 phr, fumed silica 3 phr, defoamer 0.5 phr;

[0034] Production process: Using a high-speed disperser to disperse at 2000 rpm for 30 min to reach a viscosity of 3500 ± 200 mPa·s, and then using vacuum degassing to conduct vacuum degassing treatment at -0.095 MPa for 15 min.

[0035] Example 1: Preparation of a new type of fireproof file box material

[0036] Prepare the following materials:

[0037] The thickness of the acid-free paper layer is 0.25 mm, and the grammage is 250 g / m 2 ;

[0038] The thickness of the aluminum foil protective layer is 0.07 mm;

[0039] The flame-retardant heat-insulating layer is calcium phosphate fiber paper with a thickness of 1.2 mm;

[0040] The thickness of the kraft paper printing layer is 0.10 mm, and the grammage is 100 g / m 2 ;

[0041] The production process is as follows:

[0042] Step 1: Composite the aluminum foil and the flame-retardant heat-insulating layer at a temperature of 95°C and a pressure of 0.4 MPa, with a composite speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a dosage of 120 g / m 2 , and a coating speed of 20 m / min and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame-retardant heat-insulating layer;

[0043] Step 2: Composite the double-layer structure with the acid-free paper through a cold pressing process, maintaining a pressure of 0.5 MPa at room temperature for 5 min to form a three-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer;

[0044] Step 3: Composite the three-layer structure and the kraft paper printing layer at a temperature of 105°C and a pressure of 0.3 MPa, using a roll transfer coater to coat the adhesive, with an adhesive amount of 100 g / m 2 , to form a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer - kraft paper printing layer.

[0045] Example 2: Preparation of a new fireproof archival box material

[0046] Prepare the following materials:

[0047] The thickness of the acid-free paper layer is 0.25 mm, and the grammage is 250 g / m 2 ;

[0048] The thickness of the aluminum foil protective layer is 0.10 mm;

[0049] The flame-retardant heat-insulating layer is calcium phosphate fiber paper, with a thickness of 1.2 mm;

[0050] The thickness of the kraft paper printing layer is 0.10 mm, and the grammage is 100 g / m 2 .

[0051] The production process is as follows:

[0052] Step 1: Composite the aluminum foil and the flame-retardant heat-insulating layer at a temperature of 95°C and a pressure of 0.4 MPa, with a composite speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a dosage of 120 g / m 2 , and a coating speed of 20 m / min and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame-retardant heat-insulating layer;

[0053] Step 2: Composite the double-layer structure with the acid-free paper through a cold pressing process, maintaining a pressure of 0.5 MPa at room temperature for 5 min to form a three-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer;

[0054] Step 3: Composite the three-layer structure and the kraft paper printing layer at a temperature of 105°C and a pressure of 0.3 MPa, using a roll transfer coater to coat the adhesive, with an adhesive amount of 100 g / m 2, a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant and heat-insulating layer - kraft paper printing layer is formed.

[0055] Example 3: Preparation of new fireproof file box materials

[0056] Prepare the following materials:

[0057] The thickness of the acid-free paper layer is 0.37 mm, and the grammage is 370 g / m 2 ;

[0058] The thickness of the aluminum foil protective layer is 0.10 mm;

[0059] The flame-retardant and heat-insulating layer is calcium phosphate fiber paper with a thickness of 2.0 mm;

[0060] The thickness of the kraft paper printing layer is 0.25 mm, and the grammage is 250 g / m 2 .

[0061] The production process is as follows:

[0062] Step 1: Compound the aluminum foil and the flame-retardant and heat-insulating layer at a temperature of 95 °C and a pressure of 0.4 MPa, with a compounding speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a dosage of 120 g / m 2 , a coating speed of 20 m / min, and an initial curing time of 5 s to form a two-layer structure of aluminum foil - flame-retardant and heat-insulating layer;

[0063] Step 2: Compound the two-layer structure with the acid-free paper through a cold pressing process, maintaining a pressure of 0.5 MPa at room temperature for 5 min to form a three-layer structure of acid-free paper layer - aluminum foil - flame-retardant and heat-insulating layer;

[0064] Step 3: Compound the three-layer structure and the kraft paper printing layer at a temperature of 105 °C and a pressure of 0.3 MPa, and use a roll transfer coater to coat the adhesive, with an adhesive amount of 100 g / m 2 , forming a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant and heat-insulating layer - kraft paper printing layer.

[0065] Example 4: Preparation of new fireproof file box materials

[0066] Prepare the following materials:

[0067] The thickness of the acid-free paper layer is 0.5 mm, and the grammage is 500 g / m 2 ;

[0068] The thickness of the aluminum foil protective layer is 0.15 mm;

[0069] The flame-retardant and heat-insulating layer is calcium phosphate fiber paper with a thickness of 2.0 mm;

[0070] The thickness of the kraft paper printing layer is 0.25 mm, and the grammage is 250 g / m 2 .

[0071] The production process is as follows:

[0072] Step 1: The aluminum foil and the flame-retardant heat-insulating layer are laminated at a temperature of 95 °C and a pressure of 0.4 MPa, with a lamination speed of 150 m / min. A slot die coater is used to accurately coat the adhesive, with a dosage of 120 g / m 2 , a coating speed of 20 m / min, and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame-retardant heat-insulating layer;

[0073] Step 2: The double-layer structure and the acid-free paper are laminated through a cold pressing process, and a pressure of 0.5 MPa is maintained at room temperature for 5 min to form a three-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer;

[0074] Step 3: The three-layer structure and the kraft paper printing layer are laminated at a temperature of 105 °C and a pressure of 0.3 MPa, and a roll transfer coater is used to coat the adhesive, with an adhesive amount of 100 g / m 2 , to form a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant heat-insulating layer - kraft paper printing layer.

[0075] Example 5: Preparation of a new type of fireproof packaging box material

[0076] Prepare the following materials:

[0077] Corrugated paper, with a thickness of 0.7 mm and a grammage of 700 g / m 2 ;

[0078] The aluminum foil protective layer has a thickness of 0.15 mm;

[0079] The flame-retardant heat-insulating layer is calcium phosphate fiber paper, with a thickness of 3.2 mm;

[0080] The kraft paper printing layer has a thickness of 0.25 mm and a grammage of 250 g / m 2 .

[0081] The production process is as follows:

[0082] Step 1: The aluminum foil and the flame-retardant heat-insulating layer are laminated at a temperature of 95 °C and a pressure of 0.4 MPa, with a lamination speed of 150 m / min. A slot die coater is used to accurately coat the adhesive, with a dosage of 120 g / m 2 , a coating speed of 20 m / min, and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame-retardant heat-insulating layer;

[0083] Step 2: The double-layer structure and the corrugated paper layer are laminated through a cold pressing process, and a pressure of 0.5 MPa is maintained at room temperature for 5 min to form a three-layer structure of corrugated paper layer - aluminum foil - flame-retardant heat-insulating layer;

[0084] Step 3: Compose the three-layer structure and the kraft paper printing layer at a temperature of 105°C and a pressure of 0.3 MPa. Use a roll transfer coater to apply an adhesive with a glue amount of 100 g / m 2 , to form a four-layer structure of corrugated paper layer - aluminum foil - flame-retardant and heat-insulating layer - kraft paper printing layer.

[0085] Example 6: Preparation of a new type of fireproof packaging box material

[0086] Prepare the following materials:

[0087] Corrugated paper, with a thickness of 0.7 mm and a grammage of 700 g / m 2 ;

[0088] The aluminum foil protective layer has a thickness of 0.20 mm;

[0089] The flame-retardant and heat-insulating layer is calcium phosphate fiber paper with a thickness of 3.2 mm;

[0090] The kraft paper printing layer has a thickness of 0.25 mm and a grammage of 250 g / m 2 .

[0091] The production process is as follows:

[0092] Step 1: Compose the aluminum foil and the flame-retardant and heat-insulating layer at a temperature of 95°C and a pressure of 0.4 MPa. The compounding speed is 150 m / min. Use a slot die coater to accurately apply an adhesive with a dosage of 120 g / m 2 , the coating speed is 20 m / min, and the initial curing time is 5 s, to form a two-layer structure of aluminum foil - flame-retardant and heat-insulating layer;

[0093] Step 2: Compose the two-layer structure and the corrugated paper layer through a cold pressing process. Keep the pressure at 0.5 MPa for 5 min at room temperature to form a three-layer structure of corrugated paper layer - aluminum foil - flame-retardant and heat-insulating layer;

[0094] Step 3: Compose the three-layer structure and the kraft paper printing layer at a temperature of 105°C and a pressure of 0.3 MPa. Use a roll transfer coater to apply an adhesive with a glue amount of 100 g / m 2 , to form a four-layer structure of corrugated paper layer - aluminum foil - flame-retardant and heat-insulating layer - kraft paper printing layer.

[0095] The equipment used in the production processes of the above examples is as follows:

[0096] Kraft paper printing: Industrial digital printer;

[0097] Composition of each layer: Fully automatic compounding machine;

[0098] Post-processing equipment: Fully automatic die cutter, folding and box gluing machine.

[0099] The parameters of each layer in the above examples are shown in Table 1 below.

[0100] Table 1. Parameters of each layer in each embodiment

[0101]

[0102]

[0103] To more clearly illustrate the application effects of a new type of fireproof file box, file cabinet, and fireproof packaging box material provided by the present invention, the performance of the new type of fireproof file box, file cabinet, and fireproof packaging box material in Examples 1-6 is tested as follows:

[0104] 1. Fireproof performance test

[0105] (1) Limiting oxygen index (LOI) test: Refer to GB / T 2406-2009 "Test Method for Flammability of Plastics - Oxygen Index Method". The specimen size is 80×10×3 mm, vertically fixed in the combustion tube. Adjust the oxygen / nitrogen ratio and record the lowest oxygen concentration required for the material to continuously burn for 3 minutes. LOI≥28% belongs to flame-retardant materials.

[0106] (2) Vertical burning test (UL-94): Refer to GB / T 2408-2021 "Test Method for Flammability of Plastics - Vertical Burning Method". The specimen size is 125×13×3 mm. Fix the specimen vertically and hang it in the combustion chamber. Ignite the lower end of the specimen with a Bunsen burner flame (50 W, 20 mm high) for 10 seconds. After removing the flame, record the burning time and whether the dripping ignites the absorbent cotton. The UL-94 V-0 grade needs to meet the requirements that the burning time ≤ 10 seconds and no dripping ignites the absorbent cotton.

[0107] (3) Heat release rate test: The specimen size is 100×100×3 mm, and it is ignited under a radiant heat source (50 kW / m 2 ). Record the HRR peak value.

[0108] 3. Mechanical property test

[0109] (1) Tensile strength test: Prepare dumbbell-shaped specimens (thickness 2-3 mm), and stretch them to break with a universal testing machine at a speed of 5 mm / min. Record the maximum load and displacement.

[0110] (2) Bending strength test: The specimen size is 80×10×4 mm, and it is tested by the three-point bending method. The span is 64 mm, and the loading speed is 2 mm / min until it breaks.

[0111] (3) Impact toughness test: Prepare notched specimens (63.5×12.7×3 mm, V-notch depth 2.5 mm), and test the impact energy at the notch with a pendulum impact machine.

[0112] (4) Hardness test: Measured with a Shore hardness tester (Type D), the indenter stays for 15 seconds and then reads the value.

[0113] (5) Abrasion resistance test: Using a Taber abrasion tester, with a load of 500 g, weigh the mass loss after 1000 revolutions.

[0114] The results are shown in the following table:

[0115]

[0116] As can be seen from the above, the new fireproof file boxes, file cabinets and fireproof packaging box materials of the present invention have good fireproof performance and mechanical properties.

[0117] In terms of fireproof performance, the limiting oxygen index of each embodiment is ≥ 32%, belonging to self-extinguishing materials; the vertical burning test all meets the V-0 grade; in the heat release rate test, the HRR peak value ≤ 85. The smaller the HRR peak value, the slower the flame propagation speed, the lower the pyrolysis temperature, and the significantly improved safety.

[0118] In terms of mechanical properties, the tensile strength of each embodiment is ≥ 48 MPa, the flexural strength is ≥ 62 MPa, the impact toughness is ≥ 17 kJ / m 2 , the hardness is ≥ 77 Shore D, and the mass loss of abrasion resistance is ≤ 43 mg, having good mechanical reliability.

[0119] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0120] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A novel fireproof file box, file cabinet and fireproof packaging box material, characterized in that: The material is composed of a non-acid paper layer on the inner side, an aluminum foil protective layer in the middle, a flame-retardant and heat-insulating layer, and a kraft paper printing layer on the outer side. The flame-retardant and heat-insulating layer material is one of alumina fiber paper, ceramic fiber paper, calcium phosphate fiber paper, and basalt fiber paper.

2. The novel fireproof file box, file cabinet and fireproof packing box material according to claim 1, characterized in that: The thickness of the acid-free paper layer is not less than 0.25 mm, and the grammage is 250 g / m 2 ~370 g / m 2 .

3. A novel fireproof file box, file cabinet and fireproof packaging box material according to claim 1, characterized in that: The thickness of the aluminum foil protective layer is 0.07 mm to 0.20 mm, and the thickness of the flame-retardant and heat-insulating layer is 1.2 mm to 3.2 mm.

4. A novel fireproof file box, file cabinet and fireproof packaging box material according to claim 1, characterized in that: The thickness of the kraft paper printing layer is 0.10 mm to 0.25 mm, and the grammage is 100 g / m 2 ~250 g / m 2 .

5. A novel fireproof file box, file cabinet and fireproof packaging box material according to claim 1, characterized in that: The flame-retardant and heat-insulating layer, the inner non-acid paper layer, the aluminum foil protective layer, and the kraft paper printing layer are bonded together by a halogen-free flame-retardant adhesive.

6. A novel fireproof file box, file cabinet and fireproof packaging box material according to claim 5, characterized in that: The halogen-free flame-retardant adhesive is one of phenolic resin adhesives, epoxy resin adhesives, and polyurethane adhesives.

7. The production process of a new type of fireproof file box, file cabinet and fireproof packaging box material according to claims 1-6, characterized in that, It includes the following steps: Step 1: Use a high-speed dry laminator to laminate the aluminum foil and the flame-retardant heat-insulating layer at a temperature of 95°C and a pressure of 0.4 MPa, with a lamination speed of 150 m / min. Use a slot die coater to accurately coat the adhesive, with a coating weight of 120 g / m 2 , a coating speed of 20 m / min, and an initial curing time of 5 s to form a double-layer structure of aluminum foil - flame-retardant heat-insulating layer; Step 2: Use a hydraulic cold press to compound the double-layer structure with non-acid paper through a cold pressing process, maintain a pressure of 0.5 MPa for 5 minutes at room temperature to form a three-layer structure of non-acid paper layer - aluminum foil - flame-retardant and heat-insulating layer; Step 3: Use a high-speed dry laminator to laminate the three-layer structure and the kraft paper printing layer at a temperature of 105°C and a pressure of 0.3 MPa. Use a roll transfer coater to coat the adhesive with an amount of 100 g / m 2 , forming a four-layer structure of acid-free paper layer - aluminum foil - flame-retardant and heat-insulating layer - kraft paper printing layer.

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