Composite wooden door suitable for people with low body resistance

Abstract

The utility model discloses a composite wooden door suitable for people with lower body resistance, which belongs to the field of furniture and comprises a frame, an upper composite wood paste plate and a lower composite wood paste plate, the upper composite wood paste plate and the lower composite wood paste plate are mounted in the frame and respectively sequentially comprise a first surface layer, a core layer and a second surface layer, the core layer is positioned between the first surface layer and the second surface layer, and the second surface layer is positioned between the core layer and the second surface layer. 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] This utility model relates to the field of furniture, and in particular to a composite wooden door suitable for people with low physical resistance. Background Technology

[0002] In the furniture industry, doors are a very important type of furniture. People with lower immunity include the elderly, pregnant women, infants, and patients. People with lower immunity have weaker escape abilities, lower resistance, and higher requirements for the environment. Therefore, people with lower immunity urgently need doors that meet the requirements of good flame retardancy, sound insulation, and environmental protection.

[0003] While existing market-sold doors may meet regulations regarding the release of harmful substances such as flame retardancy, sound insulation, and TVOC, or may combine two or three of these features, they often suffer from drawbacks such as low flame retardancy, poor sound insulation, and high levels of harmful substances. This negatively impacts the living experience of consumers, especially those with lower immune systems.

[0004] The above background information is provided to facilitate understanding of this utility model and is not intended to be publicly known technology that was disclosed to the general public prior to the application for this utility model. Utility Model Content

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

[0006] The technical solution is: a composite wood door suitable for people with low immunity. The composite wood door suitable for people with low immunity also includes an upper composite wood gypsum board and a lower composite wood gypsum board installed in the frame. The upper composite wood gypsum board and the lower composite wood gypsum board each sequentially include 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. The frame is filled with a filling layer.

[0007] Furthermore, the composite door suitable for people with low immunity also includes a top paper and a bottom paper.

[0008] Furthermore, the filling layer is a filling layer for plant stems; or

[0009] The filling layer is a filling layer filled with small disc-shaped wooden blocks; or

[0010] The filling layer is hollow particleboard.

[0011] Furthermore, the plant stem is 25-30mm long, and the small disc-shaped wooden block is 25-30mm long and 4-10cm in diameter.

[0012] Furthermore, the plant stems are treated with flame-retardant water immersion and heat treatment, the small disc-shaped wood blocks are treated with flame-retardant water immersion and heat treatment, and the hollow particleboard is treated with flame-retardant water immersion and heat treatment.

[0013] Furthermore, the pores of the plant stem are filled with rock wool or ceramic fiber, the pores of the small disc-shaped wood block are filled with rock wool or ceramic fiber, and the pores of the hollow particleboard are filled with rock wool or ceramic fiber.

[0014] Furthermore, the thickness of the first or second surface layer is 2.5 to 3.5 mm, and the thickness of the core layer is 3 to 6 mm.

[0015] Furthermore, the frame is uniformly provided with a number of micro-holes.

[0016] This invention has good sound insulation, extremely low formaldehyde emission (HENF level ≤0.025mg / m³), and low cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the composite door of this utility model;

[0019] Figure 2 This is an exploded view of the upper / lower flame-retardant composite wood-plaster board of this utility model;

[0020] Figure 3 This is a schematic diagram of the frame and filling structure of this utility model.

[0021] In the diagram: 1. Frame, 2. Upper composite gypsum board, 3. Lower composite gypsum board, 4. Top paper, 5. Bottom paper, 6. First surface layer, 7. Core layer, 8. Second surface layer, 9. Micropores, 10. Filling layer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise precisely specified.

[0025] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the term "prepared from" and "comprising" are synonymous. The terms "comprising," "including," "having," "containing," or any other variations thereof as used herein are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus comprising the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such a composition, step, method, article, or apparatus.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the conjunction "composed of..." excludes any unstated elements, steps, or components. If used in a claim, this phrase makes the claim closed, excluding materials other than those described, except for conventional impurities associated with them. When the phrase "composed of..." appears in a clause of the body of a claim rather than immediately following it, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, when a quantity, concentration, or other value or parameter is expressed as a range, preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1–5” is disclosed, the described range should be interpreted as including ranges “1–4”, “1–3”, “1–2”, “1–2 and 4–5”, “1–3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0029] Unless otherwise stated, all materials and equipment involved in this invention are purchased from the market.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0032] Please refer to Figures 1-3 , Figure 1 This is an exploded view of the composite door of this utility model. Figure 2 This is an exploded view of the upper / lower flame-retardant composite wood-plaster board of this utility model. Figure 3 This is a schematic diagram of the frame and filling structure of this utility model.

[0033] 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 sequentially include a first surface layer 5, a core layer 6 and a second surface layer 7, with the core layer 6 located between the first surface layer 5 and the second surface layer 7.

[0034] In one or more specific embodiments of this utility model, the composite door suitable for people with low physical resistance also includes a top paper 4 and a bottom paper 5.

[0035] In one or more specific embodiments of this utility model, the upper composite wood gypsum board 2 is an upper flame-retardant composite wood gypsum board, and the lower composite wood gypsum board 3 is a lower flame-retardant composite wood gypsum board.

[0036] In one or more specific embodiments of this utility model, 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.

[0037] In one or more specific embodiments of this utility model, micro-holes 8 are uniformly provided on the frame 1, and the micro-holes 8 are beneficial to improving the sound insulation performance of the composite door.

[0038] In one or more specific embodiments of this utility model, the frame 1 is filled with a filling layer 9, which can be hollow particleboard. The filling layer 9 can also be a filling layer formed by small, disc-shaped plant stems such as sunflower stalks, corn stalks, and sorghum stalks, 25-30mm in length. Alternatively, the filling layer 9 can be a filling layer formed by small, disc-shaped wooden blocks, 25-30mm in length and 4-10cm in diameter. This structure not only provides good sound insulation but also excellent heat insulation and flame retardancy.

[0039] In one or more specific embodiments of this utility model, in order to further improve the flame retardant and sound insulation effects, the pores of the hollow particleboard 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.

[0040] In one or more specific embodiments of this utility model, in order to further improve the flame retardancy, the hollow particleboard is a hollow particleboard that has been treated with flame retardant water and heat treatment, the plant stems are plant stems that have been treated with flame retardant water and heat treatment, and the wood blocks are wood blocks that have been treated with flame retardant water and heat treatment.

[0041] Example 1

[0042] A flame-retardant composite door suitable for people with low immunity is prepared by the following method:

[0043] S1, prepare the upper composite wood gypsum board 2 (in this embodiment, the upper flame-retardant composite wood gypsum board), the lower composite wood gypsum board 3 (in this embodiment, the lower flame-retardant composite wood gypsum board), and the frame 1 respectively.

[0044] S11, to prepare upper flame-retardant composite wood gypsum board or lower flame-retardant composite wood gypsum board.

[0045] S111 was used to prepare flame-retardant composite wood fiber and flame-retardant composite wood shavings, respectively.

[0046] S1111, Preparation of flame-retardant composite wood fiber:

[0047] S11111 involves spraying a modified silica liquid flame retardant onto wood fibers at a rate of 2 wt% of the wood fibers, followed by drying at 60-70°C until the moisture content is 20%, yielding flame-retardant wood fibers. The modified silica liquid flame retardant comprises 99 wt% silica liquid flame retardant (commercially available) and 1 wt% OP-10 (commercially available).

[0048] S11112, flame-retardant wood fiber, wool and ceramic fiber are taken to form a flame-retardant composite wood fiber for later use, wherein the weight ratio of flame-retardant wood fiber: wool: ceramic fiber is 70:15:15.

[0049] S1112, Preparation of flame-retardant composite wood shavings

[0050] S11121 uses wood shavings that have been peeled and impurities removed, with a length of 5-10mm, a thickness of 0.15-0.2mm, and a width of 1.5-2.5mm.

[0051] S11122, a modified silica liquid flame retardant is sprayed onto wood shavings at a rate of 2 wt% of the shavings' weight, and then dried at 60-70℃ until the moisture content is 20%, yielding flame-retardant wood shavings. The modified silica liquid flame retardant consists of the following components: 99 wt% silica liquid flame retardant (commercially available) and 1 wt% OP-10 (commercially available).

[0052] S11123 is made by taking flame-retardant wood shavings, wool, and ceramic fibers to form flame-retardant composite wood shavings, wherein the weight ratio of flame-retardant wood shavings, wool, and ceramic fibers is 80:10:10.

[0053] S112, the flame-retardant composite wood fiber, citric acid retarder, phosphorus boron flame retardant, and water prepared in S111 are mixed evenly in a mixer, then gypsum powder is added and the mixture is stirred evenly to form a first mixture for paving; the flame-retardant composite wood shavings, citric acid retarder, phosphorus boron flame retardant, and water prepared in S111 are mixed evenly in a mixer, then gypsum powder is added and the mixture is stirred evenly to form a second mixture for paving.

[0054] The first mixture comprises: 55% flame-retardant composite wood fiber, 20% gypsum powder, 5% citric acid retarder, 5% phosphorus-boron flame retardant, and 15% water.

[0055] The second mixture consists of 70% flame-retardant composite wood shavings, 12% gypsum powder, 3% citric acid retarder, 5% phosphorus-boron flame retardant, and 10% water.

[0056] The fineness of the gypsum powder is 0.15-0.2mm.

[0057] S113 is produced using a continuous paving production line. During paving, the first mixture is first laid on the lower layer, then the second mixture is laid on top as the middle layer, and finally the first mixture is laid on top to form the paving structure.

[0058] S114. The paving structure laid in S113 is pressurized in a multi-layer press to form a semi-finished flame-retardant composite wood gypsum board (or a semi-finished flame-retardant composite wood gypsum board). 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℃, 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.

[0059] S115, the upper semi-finished fire-retardant composite wood gypsum board (or lower semi-finished fire-retardant composite wood gypsum board) of S114 is dried in three sections:

[0060] S1141, heat-treated at 135-150℃ for 20-25 minutes, removes harmful substances such as formaldehyde, TVOC, and odors from the upper semi-finished flame-retardant composite wood gypsum board (or lower semi-finished flame-retardant composite wood gypsum board).

[0061] S1142, 105-115℃, heat treatment for 30-35 minutes, removes harmful substances such as formaldehyde, TVOC, and odors from the upper semi-finished flame-retardant composite wood gypsum board (or lower semi-finished flame-retardant composite wood gypsum board).

[0062] S1143, treated at 55-65℃ for 1-1.5 hours to prevent the upper semi-finished flame-retardant composite wood gypsum board (or the lower semi-finished flame-retardant composite wood gypsum board) from deforming in the external environment.

[0063] S116: Place the upper or lower semi-finished flame-retardant composite gypsum board (S115) horizontally in an environment of 20-30℃ and 65-70% humidity for 7 days to cure before use. When placing, stack approximately 70 boards at a time.

[0064] The thickness of the first surface layer 5 or the second surface layer 7 of the prepared upper flame-retardant composite wood paste board or the lower flame-retardant composite wood paste board is 2.5 - 3.5 mm, and the thickness of the core layer 6 is about 5 mm.

[0065] S12. Prepare the frame 1.

[0066] S121. Prepare the flame-retardant wooden door frame material:

[0067] S1211. First immersion: Immerse the glued laminated timber (or multi-layered wooden square timbers) in the flame-retardant water. Among them, the moisture content of the glued laminated timber (or multi-layered wooden square timbers) is 6 - 10%, and the width and thickness are 30 - 50 mm. 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.

[0068] 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 square timbers.

[0069] S1213. Second immersion: Immerse the heat-treated glued laminated timber (or multi-layered wooden square timbers) in the flame-retardant water of S131 again for 3 - 5 minutes.

[0070] S1214. Second heat treatment: Heat treat again at 115 - 130 °C for 45 - 60 minutes to kill insects, sterilize, remove formaldehyde, TVOC, and odors in the wooden frame square timber materials.

[0071] 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.

[0072] S2. Take the upper flame-retardant composite wood paste board and the lower flame-retardant composite wood paste board of S1, brush the flame-retardant glue on their respective upper and lower surfaces and then perform hot pressing at 160 - 180 °C with a pressure of 1.5 - 3. Mpa. Then place the decorative impregnated paper (the upper paper 4 and the lower paper 5 respectively) on one side of each, and perform hot pressing at 160 - 180 °C with a pressure of 1.5 - 3. Mpa. The flame-retardant glue is 40 wt% of formaldehyde-free polyurethane glue + 55 wt% of formaldehyde-free MDI glue + 5 wt% of phosphorus-boron flame retardant.

[0073] The decorative impregnated paper is aluminum oxide decorative impregnated paper.

[0074] S3. Put the upper composite wood paste board 2 and the lower composite wood paste board 3 of S2 into the frame 1 to form Figures 1-2 the shown flame-retardant composite door.

[0075] Example 2

[0076] Compared with the preparation method of Example 1, the difference is only that: the modified silica liquid flame retardant is replaced with the silica liquid flame retardant purchased from the market with the same weight, that is, the spraying amount of the silica liquid flame retardant purchased from the market is 2wt% of the wood fiber or wood shavings.

[0077] Comparative Example 1

[0078] 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.

[0079] Comparative Example 2

[0080] Compared with the preparation method of Example 2, the difference is that: directly use laminated wood (or multi-layer wood枋料), cut the length of the door frame material according to the size of the wooden door, and connect it with aluminum nails to make a "day" shaped (or "eye" shaped) wooden door frame.

[0081] Comparative Example 3

[0082] Compared with the preparation method of Example 2, the difference is that: in S11112 and S11123, wool and ceramic fibers are cancelled.

[0083] Comparative Example 4

[0084] 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 (cancel S111), in S112, wood fibers replace flame-retardant composite wood fibers, and wood shavings replace flame-retardant composite wood shavings.

[0085] Comparative Example 5

[0086] Compared with the preparation method of Comparative Example 4, the difference is that: directly use laminated wood (or multi-layer wood枋料), cut the length of the door frame material according to the size of the wooden door, and connect it with aluminum nails to make a "day" shaped (or "eye" shaped) wooden door frame.

[0087] Example 3

[0088] Compared with the preparation method of Comparative Example 5, the difference is that:

[0089] (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 wood枋料), and the distance between two adjacent micro-holes 8 is 3-5 mm.

[0090] (2) S2 and S3 are:

[0091] S2, take the upper composite wood plaster board 2 and the lower composite wood plaster board 3 of S1.

[0092] S3. Hollow particleboard is filled into the gaps within the frame 1 to form a filling layer 9. Ceramic fibers are filled into the pores of the hollow particleboard. Flame-retardant adhesive 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. Hot pressing is performed at 160-180℃ with a pressure of 1.5-3.0 MPa. The top paper 4 and bottom paper 5 face outwards. Decorative impregnated paper (top paper 4 and bottom paper 5, respectively) is then placed on the outward-facing sides of both the upper and lower composite gypsum board 2 and 3. Hot pressing is performed at 160-180℃ with a pressure of 1.5-3.0 MPa.

[0093] Before being filled, the hollow particleboard undergoes the following treatment:

[0094] M1 undergoes high-temperature heat treatment at 125±5℃ for 1 hour. During the treatment, the air velocity flowing over the board surface is 2-3 m / s. The high-temperature treatment and airflow remove formaldehyde, TVOC, odors, etc. from the board, ensuring that the heat-treated and purified hollow particleboard has low formaldehyde, low TVOC, and low odor.

[0095] M2, soak in flame-retardant water with a ratio of "water:AP1035A = 8:2" for 5-10 minutes at a water temperature of 50-70℃.

[0096] M3 is heat-treated at 125±5℃ for 30-50 minutes.

[0097] Example 4

[0098] The difference compared to the preparation method in Example 2 is as follows:

[0099] (1) Before S1211, there is also S1210, where micropores 8 are uniformly opened on the engineered wood (or multi-layer wood), with a depth of 5-8 mm and a diameter of 0.1-0.2 mm, and the distance between two adjacent micropores 8 is 3-5 mm.

[0100] (2) S2 and S3 are:

[0101] S2, take the upper composite gypsum board 2 and the lower composite gypsum board 3 from S1.

[0102] S3, hollow particleboard filled with ceramic fibers is used to fill the gaps within the frame 1, forming a filling layer 9. After applying flame-retardant adhesive 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. Hot pressing is performed at 160-180℃ with a pressure of 1.5-3.0 MPa. The top paper 4 and bottom paper 5 face outwards. Decorative impregnated paper (top paper 4 and bottom paper 5, respectively) is then placed on the outward-facing sides of both the upper and lower composite gypsum board 2 and 3, and hot pressing is performed at 160-180℃ with a pressure of 1.5-3.0 MPa.

[0103] Before being filled, the hollow particleboard undergoes the following treatment:

[0104] L1 undergoes high-temperature heat treatment at 125±5℃ for 1 hour. During the treatment, the air velocity flowing over the board surface is 2-3 m / s. The high-temperature treatment and airflow remove formaldehyde, TVOC, odors, etc. from the board, ensuring that the hollow particleboard after heat treatment and purification is low in formaldehyde, low in TVOC, and low in odor.

[0105] L2, soak in flame-retardant water with a ratio of "water:AP1035A = 8:2" for 5-10 minutes at a water temperature of 50-70℃.

[0106] L3 was heat-treated at 125±5℃ for 30-50 minutes.

[0107] Example 5

[0108] Compared with the preparation method of Example 4, the difference is that in S3, the filling layer 9 is replaced with a filling layer formed by small disc-shaped plant stems such as sunflower stalks, corn stalks, and sorghum with a length of 25-30mm, wherein the pores of the plant stems are filled with ceramic fibers.

[0109] Before filling with plant stems, the following treatments are performed:

[0110] M1. Soak plant stems in flame-retardant water with a ratio of 9:1 (water: liquid environmentally friendly flame retardant AP1035A (hereinafter referred to as AP1035)) for 3-4 minutes at a water temperature of 20-30℃.

[0111] M2 is treated at a high temperature of 105-125℃ for 25-40 minutes to kill insects, sterilize, and remove odors, ensuring the safety and health of the door core material.

[0112] Example 6

[0113] Compared with the preparation method of Example 4, the difference is that in S3, the filling layer 9 is replaced with 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 ceramic fibers are filled into the pores of the wooden blocks.

[0114] Before being filled with wooden blocks, the following treatment was performed:

[0115] N1, soak in flame-retardant water with a ratio of "water:AP1035A = 8:2" for 5-10 minutes at a water temperature of 45±3℃.

[0116] N2 is treated at a high temperature of 105-125℃ for 30-60 minutes. This high-temperature heat treatment can kill insects, bacteria, remove odors, and remove formaldehyde, ensuring the safety and health of the door core material.

[0117] The composite doors prepared in Examples 1-2 and Comparative Examples 1-5 were tested for fire resistance integrity using GB12955 (the frames were removed before testing, i.e., the inner core was tested), and the results are shown in Table 1 below. The composite doors prepared in Comparative Example 5 and Examples 3-6 were tested for sound insulation using GB / T8485 (the frames were removed before testing, i.e., the inner core was tested), and the results are shown in Table 1 below.

[0118] Table 1

[0119]

[0120] Each data point in Table 1 represents the average of 10 samples.

[0121] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite wooden door suitable for people with low immunity, comprising a frame, characterized in that, The composite wood door suitable for people with low physical resistance also includes an upper composite wood gypsum board and a lower composite wood gypsum board installed inside the frame. Both the upper and lower composite wood gypsum boards sequentially include a first surface layer, a core layer, and a second surface layer. The core layer is located between the first and second surface layers, and the frame is filled with a filling layer.

2. The composite wooden door suitable for people with low immunity according to claim 1, characterized in that, The composite door suitable for people with low immunity also includes a top sheet and a bottom sheet.

3. The composite wooden door suitable for people with low immunity according to claim 1, characterized in that, The filling layer is a filling layer for plant stems; or The filling layer is a filling layer filled with small disc-shaped wooden blocks; or The filling layer is hollow particleboard.

4. The composite wooden door suitable for people with low immunity according to claim 3, characterized in that, The plant stem is 25-30mm long, and the small disc-shaped wooden block is 25-30mm long and 4-10cm in diameter.

5. The composite wooden door suitable for people with low immunity according to claim 3, characterized in that, The plant stems are treated with flame-retardant water immersion and heat treatment, the small disc-shaped wood blocks are treated with flame-retardant water immersion and heat treatment, and the hollow particleboard is treated with flame-retardant water immersion and heat treatment.

6. The composite wooden door suitable for people with low immunity according to claim 3, characterized in that, The pores of the plant stems are filled with rock wool or ceramic fibers, the pores of the small disc-shaped wood blocks are filled with rock wool or ceramic fibers, and the pores of the hollow particleboard are filled with rock wool or ceramic fibers.

7. The composite wooden door suitable for people with low immunity according to claim 1, characterized in that, The thickness of the first or second surface layer is 2.5 to 3.5 mm, and the thickness of the core layer is 3 to 6 mm.

8. The composite wooden door suitable for people with low immunity according to any one of claims 1-7, characterized in that, The frame is evenly provided with a number of micro-holes.

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