Sound insulation composite door suitable for people with low body resistance and preparation method of sound insulation composite door

Abstract

The invention discloses a sound insulation composite door suitable for people with low body resistance and a preparation method of the sound insulation composite door, and belongs to the field of furniture, the sound insulation composite door comprises a frame and an upper composite wood paste plate and a lower composite wood paste plate which are installed in the frame, and each of the upper composite wood paste plate and the lower composite wood paste plate sequentially comprises a first surface layer, a core layer and a second surface layer; the core layer is located between the first surface layer and the second surface layer, micropores are evenly formed in the frame, and the frame is filled with a filling layer. The sound insulation effect is good, the formaldehyde emission is extremely low and reaches the HENF level smaller than or equal to 0.025 mg / m, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the field of furniture, and in particular to a sound-insulating composite door suitable for people with low physical resistance and a preparation method thereof. Background Art

[0002] In the furniture field, doors are a very important type of furniture. People with low physical resistance include the elderly, pregnant women, infants and patients. They have weak escape capabilities, low resistance and high requirements for the environment. Therefore, people with low physical resistance urgently need doors that are flame retardant, soundproof and environmentally friendly.

[0003] Although the doors currently sold on the market include doors with single flame retardant, single sound insulation, single TVOC and other harmful substance release levels that meet regulations, and doors that combine two or three levels, they have defects such as low flame retardant performance, poor sound insulation effect, and high harmful substance release levels, which affects the living experience of consumers, especially those with low physical resistance.

[0004] The above background technology is for facilitating understanding of the present invention and is not a known technology disclosed to the general public before the application of the present invention. Summary of the Invention

[0005] In view of the above-mentioned defects, the present invention provides a soundproof composite door suitable for people with low physical resistance, which aims to improve at least one of the problems mentioned in the background technology.

[0006] The technical solution is: a soundproof composite door suitable for people with low physical resistance, including a frame. The soundproof composite door suitable for people with low physical resistance also includes an upper composite gypsum board and a lower composite gypsum board installed in the frame. The upper composite gypsum board and the lower composite gypsum board each include a first surface layer, a core layer and a second surface layer in sequence. The core layer is located between the first surface layer and the second surface layer. Micropores are evenly opened on the frame, and a filling layer is filled in the frame.

[0007] Furthermore, the filling layer is a filling layer formed by hollow particle board, plant stems or wood blocks, the upper composite gypsum board is an upper flame retardant composite gypsum board, the lower composite gypsum board is a lower flame retardant composite gypsum board, the first surface layer or the second surface layer is a flame retardant composite wood fiber surface layer, and the core layer is a flame retardant composite wood particle layer.

[0008] Furthermore, the pores of the hollow particle board are filled with rock wool or ceramic fiber, the pores of the plant stems are filled with rock wool or ceramic fiber, and the pores of the wood blocks are filled with rock wool or ceramic fiber.

[0009] The present invention also provides a method for preparing a sound-insulating composite door suitable for people with low physical resistance.

[0010] The technical solution is: a method for preparing a sound-insulating composite door suitable for people with low physical resistance, comprising the following steps:

[0011] S1, prepare the upper composite wood gypsum board, the lower composite wood gypsum board and the frame respectively;

[0012] S2, take the upper composite wood gypsum board and the lower composite wood gypsum board of S1;

[0013] S3, filling the pores in the frame with hollow particle boards filled with rock wool or ceramic fibers, plant stems filled with rock wool or ceramic fibers, or wood blocks filled with rock wool or ceramic fibers to form a filling layer, and then hot-pressing the upper composite gypsum board and the lower composite gypsum board on the upper and lower surfaces of the filling layer.

[0014] Furthermore, the hot pressing is performed at 160-180° C. and a pressure of 1.5-3.0 MPa.

[0015] Furthermore, the frame is prepared by the following steps:

[0016] S121, preparation of flame retardant and sound insulation wooden door frame materials:

[0017] S1210, uniformly opening micropores in laminated wood or multi-layered wood;

[0018] S1211, first immersion: immerse in flame retardant water for 10-12 minutes at a temperature of 30-40°C;

[0019] S1212, first heat treatment: heat treatment at 115-130℃ for 30-40 minutes;

[0020] S1213, second immersion: immerse in flame retardant water for 3-5 minutes;

[0021] S1214, second heat treatment: heat treatment again at 115-130℃ for 45-60 minutes;

[0022] S122, take the flame retardant and soundproof wooden door frame material of S121 and cut the door frame material to the required length according to the size of the wooden door.

[0023] Furthermore, in S3, the hollow particle board undergoes the following treatments before filling:

[0024] L1, high temperature heat treatment at 125±5℃ for 1h, with the wind speed passing through the plate surface at 2-3m / s;

[0025] L2, soak in flame retardant water for 5-10 minutes, the soaking water temperature is 50-70℃;

[0026] L3, heat treatment at 125±5℃ for 30-50 minutes;

[0027] Before filling, the plant stems undergo the following treatments:

[0028] M1, soak the plant stems in flame retardant water for 3-4 minutes at a temperature of 20-30°C;

[0029] M2, treated at 105-125℃ for 25-40 minutes;

[0030] Before filling, the wood blocks undergo the following treatments:

[0031] N1, soak in flame retardant water for 5-10 minutes, the soaking water temperature is 45±3℃;

[0032] N2, treat at a high temperature of 105-125℃ for 30-60 minutes.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The invention has good sound insulation and flame retardant effects, extremely low formaldehyde emission reaching HENF level ≤ 0.025 mg / m3, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 This is an exploded schematic diagram of the composite door of the present invention;

[0037] Figure 2 2. This is a schematic diagram of the decomposition of the upper / lower flame retardant composite wood gypsum board of the present invention;

[0038] Figure 3 It is a schematic diagram of the frame and filling structure of the present invention.

[0039] In the figure: 1. frame, 2. upper composite gypsum board, 3. lower composite gypsum board, 4. upper paper, 5. lower paper, 5. first surface layer, 6. core layer, 7. second surface layer, 8. micropores, 9. filling layer. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or elements referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise specifically specified.

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the term "prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variations thereof are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus comprising the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0045] In describing the present invention, it should be noted that, unless otherwise expressly specified and limited, the conjunction "consisting of" excludes any unspecified elements, steps, or components. If used in a claim, this phrase renders the claim closed, excluding materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause within the body of a claim, rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, when an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range limited by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including the range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise specified, the range is intended to include its end values ​​and all integers and fractions within the range.

[0047] In the present invention, unless otherwise specified, the materials and equipment involved are purchased from the market.

[0048] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0050] Please refer to Figure 1-Figure 3 , Figure 1 This is a schematic diagram of the composite door of the present invention. Figure 2 This is a schematic diagram of the decomposition of the upper / lower flame retardant composite wood gypsum board of the present invention. Figure 3 It is a schematic diagram of the frame and filling structure of the present invention.

[0051] A composite door suitable for people with low physical resistance includes a frame 1 and an upper composite gypsum board 2 and a lower composite gypsum board 3 installed in the frame 1. The upper composite gypsum board 2 and the lower composite gypsum board 3 each include a first surface layer 5, a core layer 6 and a second surface layer 7 in sequence, and the core layer 6 is located between the first surface layer 5 and the second surface layer 7.

[0052] In one or more specific embodiments of the present invention, the composite door suitable for people with low physical resistance further includes an upper paper 4 and a lower paper 5.

[0053] In one or more specific embodiments of the present invention, the upper composite gypsum board 2 is an upper flame-retardant composite gypsum board, and the lower composite gypsum board 3 is a lower flame-retardant composite gypsum board.

[0054] In one or more specific embodiments of the present invention, the first surface layer 5 or the second surface layer 7 is a flame-retardant composite wood fiber surface layer, and the core layer 6 is a flame-retardant composite wood particle layer.

[0055] In one or more specific embodiments of the present invention, micropores 8 are evenly formed on the frame 1 , and the micropores 8 are beneficial to improving the sound insulation performance of the composite door.

[0056] In one or more specific embodiments of the present invention, the frame 1 is filled with a filling layer 9, which may be hollow particle board. The filling layer 9 may also be formed by small, disc-shaped pieces of plant stems, such as sunflower stalks, corn stalks, or sorghum, each 25-30 mm long. The filling layer 9 may also be formed by small, disc-shaped pieces of wood, each 25-30 mm long and 4-10 cm in diameter. Such a structure not only provides excellent sound insulation but also offers excellent heat insulation and flame retardancy.

[0057] In one or more specific embodiments of the present invention, in order to further improve the flame retardant and sound insulation effects, the pores of the hollow particle board are filled with rock wool or ceramic fiber, the pores of the plant stems are filled with rock wool or ceramic fiber, and the pores of the wood blocks are filled with rock wool or ceramic fiber.

[0058] In one or more specific embodiments of the present invention, in order to further improve the flame retardancy, the hollow particle board is a hollow particle board that has been soaked in flame retardant water and heat treated, the plant stems are plant stems that have been soaked in flame retardant water and heat treated, and the wood blocks are wood blocks that have been soaked in flame retardant water and heat treated.

[0059] Example 1

[0060] A flame-retardant composite door suitable for people with low physical resistance is prepared by the following method:

[0061] S1, prepare an upper composite gypsum board 2 (an upper flame-retardant composite gypsum board in this embodiment), a lower composite gypsum board 3 (a lower flame-retardant composite gypsum board in this embodiment) and a frame 1 respectively.

[0062] S11, preparing an upper flame-retardant composite gypsum board or a lower flame-retardant composite gypsum board.

[0063] S111, preparing flame-retardant composite wood fibers and flame-retardant composite wood shavings respectively.

[0064] S1111, Preparation of Flame-Retardant Composite Wood Fiber:

[0065] S11111, spraying a modified silica liquid flame retardant onto wood fibers at a spraying rate of 2 wt% based on the wood fibers, followed by drying at 60-70°C to a moisture content of 20% after drying, to obtain flame-retardant wood fibers. The modified silica liquid flame retardant is composed of 99 wt% of commercially available silica liquid flame retardant and 1 wt% of commercially available OP-10.

[0066] S11112, taking flame-retardant wood fiber, wool and ceramic fiber to form a flame-retardant composite wood fiber for standby use, wherein the weight ratio of flame-retardant wood fiber: wool: ceramic fiber is 70:15:15.

[0067] S1112, Preparation of flame-retardant composite wood particles

[0068] S11121, use wood shavings that have been peeled and free of impurities, with a length of 5-10mm, a thickness of 0.15-0.2mm, and a width of 1.5-2.5mm.

[0069] S11122, spraying a modified silica liquid flame retardant onto wood shavings at a spraying amount of 2 wt% based on the weight of the wood shavings, followed by drying at 60-70°C to a moisture content of 20% after drying, to obtain flame-retardant wood shavings. The modified silica liquid flame retardant comprises the following components: 99 wt% of a commercially available silica liquid flame retardant and 1 wt% of a commercially available OP-10.

[0070] S11123, taking flame retardant wood shavings, wool, and ceramic fibers to form flame retardant composite wood shavings, wherein the weight ratio of the flame retardant wood shavings, wool, and ceramic fibers is 80:10:10.

[0071] S112, stir the flame-retardant composite wood fiber, citric acid retarder, phosphorus-boron flame retardant, and water prepared in S111 in a blender, then add gypsum powder, and continue to stir evenly to form a first mixture for paving; stir the flame-retardant composite wood shavings, citric acid retarder, phosphorus-boron flame retardant, and water prepared in S111 in a blender, then add gypsum powder, and continue to stir evenly to form a second mixture for paving.

[0072] In the first mixture, flame retardant composite wood fiber 55%: gypsum powder 20%: citric acid retarder 5%: phosphorus boron flame retardant 5%: water 15%

[0073] In the second mixture, flame retardant composite wood shavings 70%: gypsum powder 12%: citric acid retarder 3%: phosphorus boron flame retardant 5%: water 10%

[0074] The fineness of gypsum powder is 0.15-0.2mm.

[0075] S113 is produced using a continuous paving production line. During paving, the first mixture is first paved on the lower layer, and then the second mixture is paved thereon as the middle layer, and finally the first mixture is paved thereon to form a paving structure.

[0076] S114, pressurize the paving structure laid out in S113 in a multi-layer press to form an upper semi-finished flame-retardant composite gypsum board (or a lower semi-finished flame-retardant composite gypsum board), wherein the upper layer is the first surface layer 5, the middle layer is the core layer 6, and the lower layer is the second surface layer 7. The pressurization pressure is 1.5-3.0 MPa, the temperature is 20-30°C, and the pressurization time is 2-3 hours. The first surface layer 5 or the second surface layer 7 is a flame-retardant composite wood fiber surface layer, and the core layer 6 is a flame-retardant composite wood shaving layer.

[0077] S115, drying the upper semi-finished flame retardant composite gypsum board (or the lower semi-finished flame retardant composite gypsum board) in S114 in three stages:

[0078] S1141, heat treatment at 135-150°C for 20-25 minutes to remove harmful substances such as formaldehyde, TVOC, and odor in the upper semi-finished flame retardant composite gypsum board (or the lower semi-finished flame retardant composite gypsum board).

[0079] S1142, 105-115°C, heat treatment for 30-35 minutes to remove harmful substances such as formaldehyde, TVOC, and odor in the upper semi-finished flame retardant composite gypsum board (or the lower semi-finished flame retardant composite gypsum board).

[0080] S1143, treatment at 55-65℃ for 1-1.5h to prevent the upper semi-finished flame retardant composite gypsum board (or lower semi-finished flame retardant composite gypsum board) from deformation when entering the external environment.

[0081] S116, the upper semi-finished flame retardant composite wood gypsum board or the lower semi-finished flame retardant composite wood gypsum board of S115 is placed horizontally in an environment of 20-30°C and 65-70% humidity for 7 days before use. When placing, the stack is stacked and overlapped with about 70 boards per pull.

[0082] The thickness of the first surface layer 5 or the second surface layer 7 of the prepared upper flame retardant composite gypsum board or the lower flame retardant composite gypsum board is 2.5-3.5 mm, and the thickness of the core layer 6 is about 5 mm.

[0083] S12, Prepare the frame 1.

[0084] S121, Prepare the flame-retardant wooden door frame material:

[0085] S1211, First immersion: Immerse the glued laminated timber (or multi-layer wooden枋material) in the flame-retardant water. Among them, the moisture content of the glued laminated timber (or multi-layer wooden枋material) is 6-10%, and the width and thickness are 30-50mm. In the flame-retardant water, water: AP103 = 8:2, the immersion time is 10-12 minutes, and the temperature of the flame-retardant water is 30-40°C.

[0086] S1212, First heat treatment: Heat-treat at 115-130°C for 30-40 minutes to kill insects, sterilize, remove formaldehyde, TVOC, and odors in the wooden枋.

[0087] S1213, Second immersion: Immerse the heat-treated glued laminated timber (or multi-layer wooden枋material) in the flame-retardant water of S131 again for 3-5 minutes.

[0088] S1214, Second heat treatment: Heat-treat again at 115-130°C high temperature for 45-60 minutes to kill insects, sterilize, remove formaldehyde, TVOC, and odors in the door frame wooden枋material.

[0089] S122, Take the flame-retardant wooden door frame material of S121, cut the length of the door frame material according to the size of the wooden door, and connect it with aluminum nails to make the "day" shaped (or "eye" shaped) wooden door frame 1.

[0090] S2, Take the upper flame-retardant composite gypsum board and the lower flame-retardant composite gypsum board of S1, brush the flame-retardant glue on their respective upper and lower surfaces and then hot-press at 160-180°C, with a pressure of 1.5-3.0 Mpa. Then place the decorative impregnated paper (the upper paper 4 and the lower paper 5 respectively) on one side of each, and hot-press at 160-180°C, with a pressure of 1.5-3.0 Mpa. The flame-retardant glue is 40wt% formaldehyde-free polyurethane glue + 55wt% formaldehyde-free MDI glue + 5wt% phosphorus-boron flame retardant.

[0091] The decorative impregnated paper is aluminum oxide decorative impregnated paper.

[0092] S3, Put the upper composite gypsum board 2 and the lower composite gypsum board 3 of S2 into the frame 1 to form Figure 1-Figure 2 The shown flame-retardant composite door.

[0093] Example 2

[0094] Compared with the preparation method of Example 1, the difference is only that: the modified silica liquid flame retardant is replaced with the same weight of commercially available silica liquid flame retardant, that is, the spraying amount of the commercially available silica liquid flame retardant is 2wt% of the wood fiber or wood shavings.

[0095] Comparative Example 1

[0096] Compared with the preparation method of Example 2, the difference is that: instead of preparing flame-retardant wood fibers and flame-retardant wood shavings, the flame-retardant wood fibers in S11111 are directly replaced with wood fibers, and the flame-retardant wood shavings in S11123 are directly replaced with wood shavings.

[0097] Comparative Example 2

[0098] Compared with the preparation method of Example 2, the difference is that: directly use laminated wood (or multi-layer wooden materials), cut the length of the door frame material according to the size of the wooden door, and use aluminum nails to connect to make a "day" shaped (or "eye" shaped) wooden door frame.

[0099] Comparative Example 3

[0100] Compared with the preparation method of Example 2, the difference is that: in S11112 and S11123, wool and ceramic fibers are removed.

[0101] Comparative Example 4

[0102] Compared with the preparation method of Example 2, the difference is that: instead of preparing flame-retardant composite wood fibers and flame-retardant composite wood shavings (removing S111), in S112, the wood fibers replace the flame-retardant composite wood fibers, and the wood shavings replace the flame-retardant composite wood shavings.

[0103] Comparative Example 5

[0104] Compared with the preparation method of Comparative Example 4, the difference is that: directly use laminated wood (or multi-layer wooden materials), cut the length of the door frame material according to the size of the wooden door, and use aluminum nails to connect to make a "day" shaped (or "eye" shaped) wooden door frame.

[0105] Example 3

[0106] Compared with the preparation method of Comparative Example 5, the difference is that:

[0107] (1) When preparing the frame 1, S1211 - S1214 are not included, and only micro-holes 8 with a depth of 5 - 8 mm and a diameter of 0.1 - 0.2 mm are evenly opened on the original laminated wood (or multi-layer wooden materials), and the distance between adjacent two micro-holes 8 is 3 - 5 mm.

[0108] (2) S2 and S3 are:

[0109] S2, take the upper composite wood plaster board 2 and the lower composite wood plaster board 3 of S1.

[0110] S3: Fill the gaps within the frame 1 with hollow particleboard to form a filling layer 9. The pores of the hollow particleboard are filled with ceramic fibers. Flame-retardant glue is then applied to the upper and lower surfaces of the filling layer 9. The upper composite gypsum board 2 is placed on the upper surface of the hollow particleboard, and the lower surface of the filling layer 9 is placed on the lower composite gypsum board 3. The process is then hot-pressed at 160-180°C and a pressure of 1.5-3.0 MPa. The upper paper 4 and the lower paper 5 are then exposed to the outside. Decorative impregnated paper (the upper paper 4 and the lower paper 5, respectively) is then placed on each of the outer-facing sides of the upper and lower composite gypsum boards 2 and 3. The process is then hot-pressed at 160-180°C and a pressure of 1.5-3.0 MPa.

[0111] Among them, the hollow particle board undergoes the following treatments before filling:

[0112] M1, carry out high temperature heat treatment at 125±5℃ for 1h. The wind speed passing through the board surface during treatment is 2-3m / s. High temperature treatment and flowing air flow are used to drive out formaldehyde, TVOC, odor, etc. in the board to ensure that the hollow particle board after heat treatment purification is low in formaldehyde, low in TVOC, and low in odor.

[0113] M2, soak in flame retardant water with a ratio of "water:AP1035A=8:2" for 5-10 minutes at a temperature of 50-70℃.

[0114] M3, heat treatment at 125±5℃ for 30-50 minutes.

[0115] Example 4

[0116] Compared with the preparation method of Example 2, the difference is:

[0117] (1) S1210 is also included before S1211, micro holes 8 are uniformly opened on the integrated wood (or multi-layer wood material), with a depth of 5-8 mm and a diameter of 0.1-0.2 mm, and a spacing of 3-5 mm between two adjacent micro holes 8.

[0118] (2) S2 and S3 are:

[0119] S2, take the upper composite gypsum board 2 and the lower composite gypsum board 3 of S1.

[0120] S3: Fill the gaps in the frame 1 with a hollow particleboard made of ceramic fiber to form a filling layer 9. Then, after applying flame-retardant glue to the upper and lower surfaces of the filling layer 9, place the upper composite gypsum board 2 on the upper surface of the hollow particleboard, and place the lower surface of the filling layer 9 on the lower composite gypsum board 3. Heat pressing is performed at 160-180°C and a pressure of 1.5-3.0 MPa. The upper paper 4 and the lower paper 5 are then exposed to the outside world. Decorative impregnated paper (the upper paper 4 and the lower paper 5, respectively) is then placed on each side of the upper composite gypsum board 2 and the lower composite gypsum board 3 facing the outside world. Heat pressing is performed at 160-180°C and a pressure of 1.5-3.0 MPa.

[0121] Among them, the hollow particle board undergoes the following treatments before filling:

[0122] L1, carry out high temperature heat treatment at 125±5℃ for 1h. The wind speed passing through the board surface during treatment is 2-3m / s. High temperature treatment and flowing air flow are used to drive out formaldehyde, TVOC, odor, etc. in the board to ensure that the hollow particle board after heat treatment purification is low in formaldehyde, low in TVOC, and low in odor.

[0123] L2, soak in flame retardant water with a ratio of "water:AP1035A=8:2" for 5-10 minutes at a temperature of 50-70℃.

[0124] L3, heat treatment at 125±5℃ for 30-50 minutes.

[0125] Example 5

[0126] Compared with the preparation method of Example 4, the difference is that in S3, the filling layer 9 is replaced by a filling layer formed by small disc-shaped plant stems such as sunflower stalks, corn stalks, sorghum, etc. with a length of 25-30 mm, wherein the pores of the plant stems are filled with ceramic fibers.

[0127] Among them, the plant stems are processed as follows before filling:

[0128] M1, plant stems are immersed in flame retardant water with a ratio of "water: liquid environmentally friendly flame retardant AP1035A (hereinafter referred to as AP1035) = 9:1" for 3-4 minutes at a water temperature of 20-30°C.

[0129] M2, treated at a high temperature of 105-125℃ for 25-40 minutes, using high temperature heat treatment to kill insects, sterilize, and remove odors to ensure the safety and health of the door core material.

[0130] Example 6

[0131] Compared with the preparation method of Example 4, the difference is that in S3, the filling layer 9 is replaced by a filling layer formed by small disc-shaped wooden blocks with a length of 25-30 mm and a diameter of 4-10 cm, wherein the pores of the wooden blocks are filled with ceramic fibers.

[0132] Among them, the wood blocks undergo the following treatments before filling:

[0133] N1, soak in flame retardant water with a ratio of "water:AP1035A=8:2" for 5-10 minutes at a temperature of 45±3℃.

[0134] N2, treated at a high temperature of 105-125℃ for 30-60 minutes. High temperature heat treatment can kill insects, sterilize, remove odors and remove formaldehyde to ensure the safety and health of the door core material.

[0135] The composite doors prepared in Examples 1-2 and Comparative Examples 1-5 were tested for fire resistance integrity using GB12955 (testing was performed after removing the frame, i.e., testing the inner core). The results are shown in Table 1. The composite doors prepared in Comparative Example 5 and Examples 3-6 were tested for sound insulation using GB / T8485 (testing was performed after removing the frame, i.e., testing the inner core). The results are shown in Table 1.

[0136] Table 1

[0137]

[0138]

[0139] Each data in Table 1 is the average value of 10 samples.

[0140] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A soundproof composite door suitable for people with low physical resistance, comprising a frame, characterized in that: The soundproof composite door suitable for people with low physical resistance also includes an upper composite gypsum board and a lower composite gypsum board installed in the frame. The upper composite gypsum board and the lower composite gypsum board each include a first surface layer, a core layer and a second surface layer in sequence. The core layer is located between the first surface layer and the second surface layer. Micropores are evenly opened on the frame, and a filling layer is filled in the frame.

2. The soundproof composite door suitable for people with low physical resistance according to claim 1, characterized in that: The filling layer is a filling layer formed by hollow particle board, plant stems or wood blocks, the upper composite wood gypsum board is an upper flame retardant composite wood gypsum board, the lower composite wood gypsum board is a lower flame retardant composite wood gypsum board, the first surface layer or the second surface layer is a flame retardant composite wood fiber surface layer, and the core layer is a flame retardant composite wood particle layer.

3. The soundproof composite door suitable for people with low physical resistance according to claim 2, characterized in that: The pores of the hollow particle board are filled with rock wool or ceramic fiber, the pores of the plant stems are filled with rock wool or ceramic fiber, and the pores of the wood blocks are filled with rock wool or ceramic fiber.

4. The soundproof composite door suitable for people with low physical resistance according to claim 3 is characterized in that: The soundproof composite door suitable for people with low physical resistance is prepared by the following steps: S1, preparing an upper composite wood gypsum board, a lower composite wood gypsum board and a frame respectively; S2, take the upper composite wood gypsum board and the lower composite wood gypsum board of S1; S3, fill the pores in the frame with hollow particle boards filled with rock wool or ceramic fibers, plant stems filled with rock wool or ceramic fibers, or wood blocks filled with rock wool or ceramic fibers to form a filling layer, and then hot-press the upper composite gypsum board and the lower composite gypsum board on the upper and lower surfaces of the filling layer.

5. The soundproof composite door suitable for people with low physical resistance according to claim 4, characterized in that: The frame is prepared by the following steps: S121, preparation of flame retardant and sound insulation wooden door frame materials: S1210, uniformly opening micro-holes in laminated wood or multi-layered wood; S1211, first immersion: immerse in flame retardant water for 10-12 minutes, the temperature of flame retardant water is 30-40℃; S1212, first heat treatment: heat treatment at 115-130°C for 30-40 minutes; S1213, second immersion: immerse in flame retardant water for 3-5 minutes; S1214, second heat treatment: heat treatment again at 115-130℃ for 45-60 minutes; S122, take the flame retardant and sound insulation wooden door frame material of S121 and cut the length of the door frame material according to the size of the wooden door.

6. A method for preparing a soundproof composite door suitable for people with low physical resistance, characterized in that: The following steps are involved: S1, preparing an upper composite wood gypsum board, a lower composite wood gypsum board and a frame respectively; S2, take the upper composite wood gypsum board and the lower composite wood gypsum board of S1; S3, fill the pores in the frame with hollow particle boards filled with rock wool or ceramic fibers, plant stems filled with rock wool or ceramic fibers, or wood blocks filled with rock wool or ceramic fibers to form a filling layer, and then hot-press the upper composite gypsum board and the lower composite gypsum board on the upper and lower surfaces of the filling layer.

7. The method for preparing a soundproof composite door suitable for people with low physical resistance according to claim 6, characterized in that: The hot pressing is performed at 160-180° C. and a pressure of 1.5-3.0 MPa.

8. The method for preparing a soundproof composite door suitable for people with low physical resistance according to claim 7, characterized in that: The frame is prepared by the following steps: S121, preparation of flame retardant and sound insulation wooden door frame materials: S1210, uniformly opening micro-holes in laminated wood or multi-layered wood; S1211, first immersion: immerse in flame retardant water for 10-12 minutes, the temperature of flame retardant water is 30-40℃; S1212, first heat treatment: heat treatment at 115-130°C for 30-40 minutes; S1213, second immersion: immerse in flame retardant water for 3-5 minutes; S1214, second heat treatment: heat treatment again at 115-130℃ for 45-60 minutes; S122, take the flame retardant and sound insulation wooden door frame material of S121 and cut the length of the door frame material according to the size of the wooden door.

9. The method for preparing a soundproof composite door suitable for people with low physical resistance according to claim 6, characterized in that: In S3, the hollow particleboard is treated as follows before filling: L1, high temperature heat treatment at 125±5℃ for 1h, the wind speed passing through the plate surface during the treatment is 2-3m / s; L2, soak in flame retardant water for 5-10 minutes, the soaking water temperature is 50-70℃; L3, heat treatment at 125±5℃ for 30-50 minutes; Before filling, the plant stems are processed as follows: M1, plant stems are immersed in flame retardant water for 3-4 minutes at a temperature of 20-30°C; M2, treated at 105-125℃ for 25-40 minutes; Before filling, the wood blocks are processed as follows: N1, soak in flame retardant water for 5-10 minutes, the soaking water temperature is 45±3℃; N2, treated at 105-125℃ for 30-60 minutes.

10. The method for preparing a soundproof composite door suitable for people with low physical resistance according to claim 9, characterized in that: In L2, the flame retardant water is water:AP1035A=8:2; in M1, the flame retardant water is water:AP1035A)=9:1; in N1, the flame retardant water is water:AP1035A=8:2.

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