A humidity-adjustable bamboo silk decorative panel and its preparation method and application

Abstract

The present invention provides a humidity-adjustable bamboo silk decorative panel and a preparation method and application thereof, belonging to the technical field of artificial panels. The decorative panel comprises a solid wood strip composite board layer, a bamboo silk decorative layer and a straw paper layer, wherein the bamboo silk decorative layer is arranged on the upper surface and / or the lower surface of the solid wood strip composite board layer, and the straw paper layer is arranged between the solid wood strip composite board layer and the bamboo silk decorative layer. The thickness of the straw paper layer does not exceed 1 mm. The decorative panel has good visual effect, good mechanical properties and humidity-adjusting function. The preparation method comprises: soaking the straw paper in a first glue, and then placing it between the solid wood strip composite board layer and the bamboo silk decorative layer to obtain a slab; then pressing the slab, and performing segmented pressure relief and health care in sequence. The method is simple, easy to realize industrialized continuous production, can greatly improve production efficiency and reduce production costs. It is used in decoration or decorative products to improve the toughness, strength, stereoscopic vision and environmental performance of the decorative products.

Description

Technical Field

[0001] The invention relates to the technical field of artificial boards, and in particular to a humidity-adjustable bamboo silk decorative panel and a preparation method and application thereof. Background Art

[0002] As an indispensable material in the field of building decoration, bamboo still occupies an extremely important position in the current field of building decoration.

[0003] However, currently common wood decorative products, such as bamboo decorative panels in furniture, have high formaldehyde content, mediocre bonding and performance, single variety, poor three-dimensional effect, low production efficiency and high cost.

[0004] Therefore, it is necessary to improve the existing decorative panels. Summary of the invention

[0005] One of the purposes of the present invention is to provide a humidity-adjustable bamboo silk decorative panel, which has good visual effects, good mechanical properties and humidity-adjusting functions.

[0006] The second object of the present invention is to provide a method for manufacturing the above-mentioned humidity-adjustable bamboo silk decorative panel, which is simple and easy to realize industrial continuous production, and can greatly improve production efficiency and reduce production costs.

[0007] The third object of the present invention is to provide an application of the above-mentioned humidity-adjustable bamboo silk decorative panel, which can be used in decoration or decorative products to improve the toughness, strength, three-dimensional vision and environmental performance of the decorative products.

[0008] The present invention solves the technical problem by adopting the following technical solutions:

[0009] The present invention proposes a humidity-adjustable bamboo silk decorative panel, comprising a solid wood strip composite board layer, a bamboo silk decorative layer and a straw paper layer, wherein the bamboo silk decorative layer is arranged on the upper surface and / or the lower surface of the solid wood strip composite board layer, and the straw paper layer is arranged between the solid wood strip composite board layer and the bamboo silk decorative layer; the thickness of the straw paper layer does not exceed 1 mm.

[0010] The present invention also provides a method for preparing the above-mentioned humidity-adjustable bamboo silk decorative panel, comprising the following steps:

[0011] The straw paper is soaked in the first glue, and the soaked straw paper is placed between the solid wood strip composite board layer and the bamboo silk decorative layer to obtain a slab; then the slab is pressed, and the pressure is relieved and cured in sections in sequence.

[0012] The present invention also provides an application of the humidity-adjustable bamboo silk decorative panel in decoration or decorative products.

[0013] For example, decorative products may include wardrobe panels, bookcase panels, door panels, partitions or wall veneers.

[0014] The beneficial effects of the humidity-adjustable bamboo silk decorative panel and its preparation method and application in the preferred embodiment of the present invention include:

[0015] 1. The two unit materials used, bamboo silk decorative materials and solid wood plywood, are products with wide access channels and stable performance. Combining the two into decorative panels with a specific thickness is easy to achieve industrialized continuous production, simplified process, high production efficiency and controllable quality;

[0016] 2. The physical and mechanical strength indicators of bamboo silk decorative materials and solid wood composite decorative panels can meet the requirements of relevant standards for indoor furniture materials and components. The processing and utilization of the products as furniture components in the later stage are no different from conventional decorative panels, and there are no obstacles to the application of the products in the later stage;

[0017] 3. The application scope and field of bamboo silk decorative materials and solid wood plywood decorative panels are wide, which is conducive to the high-value utilization of bamboo and wood;

[0018] 4. The humidity-adjustable bamboo silk decorative panel provided in the embodiment of the present invention is a new idea of ​​bamboo-wood composite, which uses "cross-border" bamboo silk decorative materials and simple-to-process solid wood plywood to form a "bamboo facade wood core" decorative panel with three-dimensional vision and good environmental humidity-adjusting performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a humidity-adjustable bamboo silk decorative panel in Example 1 of the present invention;

[0021] Figure 2 This is a schematic structural diagram of a humidity-adjustable bamboo silk decorative panel in Example 3 of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a humidity-adjustable bamboo silk decorative panel in Example 10 of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the humidity-adjustable bamboo silk decorative panel in Example 12 of the present invention.

[0024] Icon: 10-humidity-adjustable bamboo silk decorative panel; 11-solid wood strip composite board layer; 111-upper board layer; 112-middle board layer; 113-lower board layer; 114-surface layer; 12-bamboo silk decorative layer; 13-straw paper layer; 14-transition layer. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0026] The humidity-adjustable bamboo silk decorative panel according to the embodiment of the present invention and its preparation method and application are described in detail below.

[0027] The raw materials of the humidity-adjustable bamboo silk decorative panel provided in the embodiment of the present invention mainly include solid wood strips and bamboo silk. Structurally, the bamboo silk decorative panel includes a solid wood strip composite board layer, a bamboo silk decorative layer and a straw paper layer, wherein the bamboo silk decorative layer is arranged on the upper surface and / or the lower surface of the solid wood strip composite board layer, and the straw paper layer is arranged between the solid wood strip composite board layer and the bamboo silk decorative layer. The thickness of the straw paper layer does not exceed 1 mm.

[0028] As an option, the bamboo silk decorative panel may, for example, include a layer of solid wood strip composite board layer, a layer of bamboo silk decorative layer and a layer of straw paper layer, the bamboo silk device layer is arranged on the upper surface or lower surface of the solid wood strip composite board layer, and the straw paper layer is arranged between the solid wood strip composite board layer and the bamboo silk decorative layer.

[0029] Furthermore, the bamboo silk decorative panel may include, for example, a solid wood strip composite board layer, two bamboo silk decorative layers, and two straw paper layers, wherein the two bamboo silk device layers are respectively arranged on the upper surface and the lower surface of the solid wood strip composite board layer, and the two straw paper layers are respectively arranged between the solid wood strip composite board layer and the two bamboo silk decorative layers. It is worth noting that the thickness of the two straw paper layers may be the same or different.

[0030] In addition, as needed, multiple groups of structural units consisting of a straw paper layer and a bamboo silk decorative layer can be repeatedly arranged on the surface of at least one side (the same side) of the solid wood strip composite board layer, such as 2 groups, 3 groups or 4 groups.

[0031] The straw paper layer provided in the embodiment of the present invention has a dense structure and good glue adhesion. However, the surfaces of the bamboo silk decorative layer and the solid wood strip composite board layer both have poor glue adhesion. If glue is directly applied on the surface of the bamboo silk decorative layer or the solid wood strip composite board layer, it is not only difficult to glue or the amount of glue adhesion is small, but also easy to overflow glue, resulting in poor bonding between the two. In view of this, the embodiment of the present invention provides a straw paper layer with a thickness of no more than 1mm between the two. On the one hand, it can adsorb glue that exceeds the adsorption capacity of the bamboo silk decorative layer and the solid wood strip composite board layer, and increase the actual glue content between the bamboo silk decorative layer and the solid wood strip composite board layer as a medium, thereby improving the bonding strength between the two. On the other hand, the straw paper is relatively thin, which can avoid adverse effects on the thickness of the bamboo silk decorative panel.

[0032] For reference, the solid wood strip composite board layer in the embodiment of the present invention is spliced ​​by multiple solid wood strips. The wood strips can be processed from high-quality natural wood boards after drying in a drying chamber, and have a strong sense of solid wood. The raw materials of the wood strips can come from a single tree species or mixed tree species with similar performance. Specifically, the solid wood strip composite board layer may include an upper board layer, a middle board layer and a lower board layer, the middle board layer is arranged between the upper board layer and the lower board layer, and the bamboo silk decorative layer is arranged on the surface of the upper board layer of the solid wood strip composite board layer away from the middle board layer and / or the surface of the lower board layer of the solid wood strip composite board layer away from the middle board layer. The role of the upper board layer and the lower board layer is to make the solid wood strip composite board layer have sufficient lateral strength, and at the same time buffer the adverse effects of the unevenness of the wood core board on the flatness of the board surface. The middle board layer is mainly to provide a certain thickness and strength to the solid wood strip composite board layer.

[0033] Preferably, a surface layer not exceeding 2 mm can be provided on the side of the upper board layer away from the middle board layer, which can improve the aesthetics and increase the longitudinal strength of the board. In this case, the bamboo silk decorative layer is provided on the surface of the surface layer of the solid wood strip composite board layer away from the upper board layer and / or the surface of the lower board layer of the solid wood strip composite board layer away from the middle board layer.

[0034] Optionally, each of the solid wood strips may have a thickness of 8-12 mm and a density of 0.5-1 g / cm 3 By limiting the thickness, density and moisture content of the solid wood strips to the above preferred ranges, the solid wood strips can have better strength and be effectively combined with the straw paper layer and the bamboo silk decorative layer.

[0035] Optionally, the bamboo filaments in the bamboo filament decorative layer in the embodiment of the present invention are porous fibers and resin natural cements, the main components of which are cellulose, hemicellulose and lignin. The free hydroxyl groups on the molecular chains of the bamboo filaments provide the bamboo with many affinity points that can bind to water, and the bamboo filaments are easy to absorb and evaporate water in the atmosphere, and have good environmental humidity control properties. Preferably, the raw material of the bamboo filaments is selected from moso bamboo.

[0036] Preferably, the diameter of the bamboo filaments selected in the embodiment of the present invention does not exceed 5 mm, and the thickness of the bamboo filaments is 1.5-2.5 mm, and the density is 1-1.1 g / cm 3 , the moisture content is 8-12%. The above-mentioned bamboo silk is obtained by drawing the split bamboo strips without separating the green bamboo and the yellow bamboo, and the ends thereof can be round, long strip, rectangular, diamond-shaped, etc. By limiting the thickness, density and moisture content of the bamboo silk to the above-mentioned preferred range, on the one hand, the bamboo silk can have better strength and be effectively combined with the straw paper layer and the bamboo silk decorative layer; on the other hand, the bamboo silk can also maintain a better humidity control effect, thereby improving the comfort and safety of the indoor environment.

[0037] It is worth noting that the bamboo fibers in the embodiment of the present invention can be arranged horizontally on the surface of the solid wood strip composite board layer, or can be arranged vertically on the surface of the solid wood strip composite board layer. The bamboo fibers can be taken from the part close to the bamboo core to obtain bamboo fibers with larger pores for structural transmission, or can be taken from the part far from the bamboo core to obtain bamboo fibers with higher density and smaller pores.

[0038] Furthermore, the humidity-adjustable bamboo silk decorative panel in the embodiment of the present invention may further include a transition layer, which is disposed between the straw paper layer and the bamboo silk decorative layer and has a thickness of no more than 0.5 mm. Optionally, the transition layer includes a flame retardant layer, a water absorbing layer, an insect-proof layer or a buffer layer.

[0039] The water-absorbing layer is composed of a plurality of nano-scale microcapsules, each of which includes a water-absorbing resin in the inner layer and a coating covering the surface of the water-absorbing resin. The coating is made of a water-permeable material. In an embodiment of the present invention, the water permeability of the coating is lower than the water absorption rate of the water-absorbing resin. By setting the water-absorbing layer, when the humidity of the bamboo silk decorative panel is high, part of the water can be absorbed by the water-absorbing resin through the coating, and when the humidity of the bamboo silk decorative panel is low, part of the water absorbed in the water-absorbing resin can enter the surface structure of the bamboo silk decorative panel through the coating.

[0040] Combining the water-absorbing layer with the bamboo silk material can further improve and enhance the moisture buffering capacity of the humidity-adjustable bamboo silk decorative panel.

[0041] The flame retardant layer mainly plays a flame retardant role, because the raw materials of the humidity-adjustable bamboo silk decorative panel are basically combustibles, especially the straw layer, which is thinner and more flammable than the bamboo silk decorative layer and the straw paper layer. In view of this, the transition layer can be set as a flame retardant layer. Optionally, the raw materials of the flame retardant layer in the embodiment of the present invention can be composed of antimony trioxide and red phosphorus in a weight ratio of 1-1.5:0.6-0.8. Among them, red phosphorus plays the main flame retardant role, and antimony trioxide plays a synergistic role. Since red phosphorus has good dispersibility and good compatibility with the glue between the straw paper layer and the bamboo silk decorative layer, it is not easy to migrate, so it can have a good flame retardant effect, especially it can prevent the straw layer from burning.

[0042] The insect-proof layer can make the humidity-adjustable bamboo silk decorative panel have a certain insect-proof effect, and prevent the wood strips or bamboo silk from being eaten by insects. The buffer layer can make the humidity-adjustable bamboo silk decorative panel play a certain buffering role, so as to prevent the decorative panel from being deformed or damaged under the action of a large external force.

[0043] In continuation of the above, the embodiment of the present invention provides a humidity-adjustable bamboo silk decorative panel prepared by using bamboo silk decorative materials, straw paper and solid wood strips, which can expand the range of bamboo-wood composite products, transform the bamboo-wood composite manufacturing field from structural materials to the field of decorative materials, and improve the added value of products, which belongs to the high-value utilization of bamboo and wood resources. In addition, the provided humidity-adjustable bamboo silk decorative panel not only has the excellent characteristics of high density, good toughness and high strength, but also has elegant and clear surface texture, beautiful color, and more three-dimensional visual effect, which can fully reflect the characteristics of human and nature interdependent and integrated, and it also has humidity adjustment and optional flame retardant, insect-proof and buffering functions, which can adjust the indoor humidity to a certain extent and comprehensively improve the comfort of indoor living.

[0044] In addition, an embodiment of the present invention also provides a method for preparing the above-mentioned humidity-adjustable bamboo silk decorative panel, which may include the following steps: soaking straw paper in a first glue, placing the soaked straw paper between a solid wood strip composite board layer and a bamboo silk decorative layer to obtain a slab; then pressing the slab, and performing segmented pressure relief and curing in turn.

[0045] The solid wood strip composite board layer can be made by evenly coating the left and right contact surfaces of the solid wood strip with isocyanate adhesive, with the amount of adhesive applied being 55-65g / m 2 Then proceed with splicing, which can be done at a pressure of 0.7-0.9 MPa for 2.5-3.5 hours. After the adhesive in the solid wood board substrate is cured, the surface is sanded to ensure that the board surface is flat and there is no adhesive residue in the splicing gap.

[0046] The straw paper is soaked in soybean vegetable protein glue until the amount of glue soaked in the straw paper is 100-120g / m 2So that the upper and lower layers of straw paper are evenly distributed with soybean vegetable protein glue. After soaking, it can be drained until there is no glue dripping continuously to prevent excessive glue from causing glue penetration in later products or increasing production costs.

[0047] Pressing includes cold pressing and hot pressing. Cold pressing is the first pressing at 20-30°C and a pressure of 0.4-0.6MPa for 1.5-2.5h, and hot pressing is the second pressing at 100-115°C and a pressure of 1-1.2MPa for 8-12min. After hot pressing, the pressure is reduced and released in stages.

[0048] Through the above-mentioned pressing process, it is possible to avoid the bamboo silk units in the bamboo silk decorative material being destroyed or crushed due to excessive pressure under high pressure, and it is also possible to avoid the situation where the pressing time is too short and the performance is reduced due to failure to achieve complete gluing; at the same time, it is also possible to shorten the production and processing time and achieve energy saving and high yield.

[0049] After the pressure is released, the humidity-adjustable bamboo silk decorative panel is cooled at room temperature and then put into curing for 20-30 hours. The curing can release the stress between the adhesive layers, making the internal performance of the panel more stable.

[0050] In addition, an embodiment of the present invention also provides an application of the above-mentioned humidity-adjustable bamboo silk decorative panel, for example, it can be used in decoration or decorative products, and the decorative products may include wardrobe panels, bookcase panels, door panels, partitions or wall decorative panels.

[0051] As mentioned above, the humidity-adjustable bamboo silk decorative panel provided by the embodiment of the present invention avoids the tedious material preparation stage in the production of common wood-based artificial boards (particle boards, fiber boards, etc.), reduces the amount of adhesive used, improves the production environment, and reduces mechanical loss. The bamboo silk decorative material used has excellent visual properties, is easy to dye, print and other modified processes, and can be properly humidified, which is better than the veneer materials of other decorative panels. The decorative panel obtained by the present invention can meet the requirements of various uses, and can be used for furniture panels, wall decorative panels and door panel components, etc. It not only has good visual properties and environmental protection effects, but also has better humidity-adjusting performance for the environment than veneer artificial boards.

[0052] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0053] Example 1

[0054] Please refer to Figure 1 The humidity-adjustable bamboo silk decorative panel 10 provided in this embodiment includes a solid wood strip composite board layer 11, a bamboo silk decorative layer 12 and a straw paper layer 13 with a thickness of 1 mm. The bamboo silk decorative layer 12 is arranged on the upper surface of the solid wood strip composite board layer 11, and the straw paper layer 13 is arranged between the solid wood strip composite board layer 11 and the bamboo silk decorative layer 12.

[0055] Example 2

[0056] The humidity-adjustable bamboo silk decorative panel 10 provided in this embodiment comprises a solid wood strip composite board layer 11, a bamboo silk decorative layer 12 and a straw paper layer 13 with a thickness of 0.8 mm. The bamboo silk decorative layer 12 is arranged on the lower surface of the solid wood strip composite board layer 11, and the straw paper layer 13 is arranged between the solid wood strip composite board layer 11 and the bamboo silk decorative layer 12.

[0057] Example 3

[0058] Please refer to Figure 2 The humidity-adjustable bamboo silk decorative panel 10 provided in this embodiment includes a solid wood strip composite board layer 11, two bamboo silk decorative layers 12, and two straw paper layers 13 each with a thickness of 0.5 mm. The two bamboo silk device layers are respectively arranged on the upper surface and the lower surface of the solid wood strip composite board layer 11, and the two straw paper layers 13 are respectively arranged between the solid wood strip composite board layer 11 and the two bamboo silk decorative layers 12.

[0059] Example 4

[0060] The difference between this embodiment and Embodiment 3 is that the thickness of the straw paper layer 13 arranged between the bamboo wire device layer on the upper surface of the solid wood strip composite board layer 11 and the upper surface of the solid wood strip composite board layer 11 is 0.5 mm, and the thickness of the straw paper layer 13 arranged between the bamboo wire device layer on the lower surface of the solid wood strip composite board layer 11 and the lower surface of the solid wood strip composite board layer 11 is 0.3 mm.

[0061] Example 5

[0062] The difference between this embodiment and the third embodiment is that two groups of structural units composed of straw paper layers 13 and bamboo silk decorative layers 12 are repeatedly arranged on both sides of the solid wood strip composite board layer 11.

[0063] Example 6

[0064] The difference between this embodiment and the third embodiment is that structural units composed of three groups of straw paper layers 13 and bamboo silk decorative layers 12 are repeatedly arranged on both sides of the solid wood strip composite board layer 11 .

[0065] Example 7

[0066] The difference between this embodiment and the third embodiment is that structural units composed of four groups of straw paper layers 13 and bamboo silk decorative layers 12 are repeatedly arranged on both sides of the solid wood strip composite board layer 11 .

[0067] Example 8

[0068] The difference between this embodiment and Embodiment 3 is that a structural unit consisting of two groups of straw paper layers 13 and bamboo silk decorative layers 12 is repeatedly arranged on one side of the upper surface of the solid wood strip composite board layer 11, and a structural unit consisting of three groups of straw paper layers 13 and bamboo silk decorative layers 12 is repeatedly arranged on one side of the lower surface of the solid wood strip composite board layer 11.

[0069] Example 9

[0070] The bamboo silk decorative panel in this embodiment can refer to any one of Embodiments 1-9, but in this embodiment, the solid wood strip composite board layer 11 is composed of an upper board layer 111, a middle board layer 112 and a lower board layer 113.

[0071] Example 10

[0072] Please refer to Figure 3 The difference between this embodiment and Embodiment 9 is that a 2 mm surface layer 114 is further provided on the side of the upper board layer 111 of the solid wood strip composite board layer 11 away from the middle board layer 112 .

[0073] Embodiment 11

[0074] The difference between this embodiment and Embodiment 9 is that a 1 mm surface layer 114 is further provided on the side of the upper board layer 111 of the solid wood strip composite board layer 11 away from the middle board layer 112 .

[0075] Example 12

[0076] Please refer to Figure 4 The bamboo silk decorative panel in this embodiment can refer to any one of embodiments 1-11, but in this embodiment, the bamboo silk decorative panel also includes a transition layer 14 with a thickness of 0.5 mm, and the transition layer 14 is arranged between the straw paper layer 13 and the bamboo silk decorative layer 12.

[0077] Example 13

[0078] The bamboo silk decorative panel in this embodiment can refer to any one of embodiments 1-11, but in this embodiment, the bamboo silk decorative panel also includes a transition layer 14 with a thickness of 0.2 mm, and the transition layer 14 is arranged between the straw paper layer 13 and the bamboo silk decorative layer 12.

[0079] Embodiment 14

[0080] The bamboo silk decorative panel in this embodiment can refer to embodiment 12 or embodiment 13, the transition layer 14 is a water-absorbing layer, and the water-absorbing layer is composed of a plurality of nano-scale microcapsules, each of which includes a water-absorbing resin located in the inner layer and a coating covering the surface of the water-absorbing resin. The coating is made of a water-permeable material.

[0081] Embodiment 15

[0082] The bamboo silk decorative panel in this embodiment can refer to Embodiment 12 or Embodiment 13, and the transition layer 14 is a flame retardant layer. The raw materials of the flame retardant layer are composed of antimony trioxide and red phosphorus in a weight ratio of 1:0.6.

[0083] Example 16

[0084] The bamboo silk decorative panel in this embodiment can refer to Embodiment 12 or Embodiment 13, and the transition layer 14 is a flame retardant layer. The raw materials of the flame retardant layer are composed of antimony trioxide and red phosphorus in a weight ratio of 1.5:0.8.

[0085] Embodiment 17

[0086] The bamboo silk decorative panel in this embodiment can refer to Embodiment 12 or Embodiment 13, and the transition layer 14 is a flame retardant layer. The raw materials of the flame retardant layer are composed of antimony trioxide and red phosphorus in a weight ratio of 1.25:0.7.

[0087] Embodiment 18

[0088] This embodiment provides a method for preparing a humidity-adjustable bamboo silk decorative panel 10. The humidity-adjustable bamboo silk decorative panel 10 can be described in any one of Embodiments 1-17.

[0089] With a thickness of 8 mm and a density of 0.5 g / cm 3 , the left and right contact surfaces of the solid wood strips with a moisture content of 8% are evenly coated with isocyanate adhesive, with an application amount of 55g / m 2 Then, the panels are spliced ​​and shaped for 3.5 hours under a pressure of 0.7 MPa. After the adhesive in the solid wood panel substrate is cured, the surface is sanded to ensure that the panel surface is flat and there is no adhesive residue in the joint gap.

[0090] Soak the straw paper in soybean vegetable protein glue until the amount of glue soaked in the straw paper is 100g / m 2 After soaking, drain until there is no glue dripping continuously. Place the soaked straw paper between the solid wood strip composite board layer 11 and the bamboo silk decorative layer 12 to obtain a slab. The diameter of the bamboo silk in the bamboo silk decorative layer 12 is 5mm, the thickness of the bamboo silk is 1.5mm, and the density is 1g / cm 3 And the moisture content is 8%.

[0091] The first pressing was performed at 20° C. and a pressure of 0.4 MPa for 2.5 h, and then the second pressing was performed at 100° C. and a pressure of 1 MPa for 12 min. After the hot pressing was completed, the pressure was reduced and released in stages, and then cooled at room temperature and cured for 20 h to obtain a humidity-adjustable bamboo fiber decorative panel 10.

[0092] Embodiment 19

[0093] The difference between this embodiment and embodiment 14 is that:

[0094] With a thickness of 12 mm and a density of 1 g / cm 3 , the left and right contact surfaces of the solid wood strips with a moisture content of 12% are evenly coated with isocyanate adhesive, with an application amount of 65g / m 2 Then, the panels are spliced ​​and shaped for 2.5 hours under a pressure of 0.9 MPa. After the adhesive in the solid wood panel substrate is cured, the surface is sanded to ensure that the panel surface is flat and there is no adhesive residue in the joint gap.

[0095] Soak the straw paper in soybean vegetable protein glue until the amount of glue soaked in the straw paper is 120g / m 2 After soaking, drain until there is no glue dripping continuously. Place the soaked straw paper between the solid wood strip composite board layer 11 and the bamboo silk decorative layer 12 to obtain a slab. The diameter of the bamboo silk in the bamboo silk decorative layer 12 is 4 mm, the thickness of the bamboo silk is 2.5 mm, and the density is 1.1 g / cm 3 And the moisture content is 12%.

[0096] The first pressing was performed at 30° C. and a pressure of 0.6 MPa for 1.5 h, and then the second pressing was performed at 115° C. and a pressure of 1.2 MPa for 8 min. After the hot pressing was completed, the pressure was reduced and released in stages, and then cooled at room temperature and cured for 30 h to obtain a humidity-adjustable bamboo fiber decorative panel 10.

[0097] Embodiment 20

[0098] The difference between this embodiment and embodiment 14 is that:

[0099] With a thickness of 10 mm and a density of 0.75 g / cm 3 , the left and right contact surfaces of the solid wood strips with a moisture content of 10% are evenly coated with isocyanate adhesive, with an application amount of 60g / m 2 Then, the panels are spliced ​​and shaped for 3 hours under a pressure of 0.8 MPa. After the adhesive in the solid wood panel substrate is cured, the surface is sanded to ensure that the panel surface is flat and there is no adhesive residue in the joint gap.

[0100] Soak the straw paper in soybean vegetable protein glue until the amount of glue soaked in the straw paper is 110g / m 2 After soaking, drain until there is no glue dripping continuously. Place the soaked straw paper between the solid wood strip composite board layer 11 and the bamboo silk decorative layer 12 to obtain a slab. The diameter of the bamboo silk in the bamboo silk decorative layer 12 is 3mm, the thickness of the bamboo silk is 2mm, and the density is 1.05g / cm 3 And the moisture content is 10%.

[0101] The first pressing was performed at 25° C. and a pressure of 0.5 MPa for 2 h, and then the second pressing was performed at 112.5° C. and a pressure of 1.1 MPa for 10 min. After the hot pressing was completed, the pressure was reduced and released in stages, and then cooled at room temperature and cured for 25 h to obtain a humidity-adjustable bamboo fiber decorative panel 10.

[0102] Embodiment 21

[0103] This embodiment provides an application of a humidity-adjustable bamboo silk decorative panel 10. The humidity-adjustable bamboo silk decorative panel 10 is described in any one of Embodiments 1 to 17. Specifically, it is used to make a wardrobe panel.

[0104] Embodiment 22

[0105] This embodiment provides an application of a humidity-adjustable bamboo silk decorative panel 10. The humidity-adjustable bamboo silk decorative panel 10 is described in any one of Embodiments 1 to 17. Specifically, it is used to make a bookcase panel.

[0106] Embodiment 23

[0107] This embodiment provides an application of a humidity-adjustable bamboo silk decorative panel 10. The humidity-adjustable bamboo silk decorative panel 10 is described in any one of Embodiments 1 to 17. Specifically, it is used to make a door panel.

[0108] Embodiment 24

[0109] This embodiment provides an application of a humidity-adjustable bamboo silk decorative panel 10. The humidity-adjustable bamboo silk decorative panel 10 is described in any one of Embodiments 1 to 17. Specifically, it is used to make a wall decorative panel.

[0110] Test example

[0111] According to the provisions of "Limits of Formaldehyde Emission from Artificial Boards and Their Products for Indoor Decoration and Renovation Materials" (GB / T18580-2001) and "Artificial Boards with Impregnated Film Paper Veneers" (GB / T15102-2006), the humidity-adjustable bamboo silk decorative panel provided in the embodiment of the present invention was measured.

[0112] The results show that the test results of all the adjustable humidity bamboo silk decorative panels provided by the embodiments of the present invention meet the following requirements: static bending strength ≥ 20MPa, surface bonding strength ≥ 0.60MPa, water absorption thickness expansion rate ≤ 8%, and formaldehyde emission level E1, which are in line with the provisions of "Limits of Formaldehyde Emission in Artificial Boards and Their Products for Indoor Decoration and Renovation Materials" (GB / T 18580-2001) and "Artificial Boards with Impregnated Film Paper Veneer" (GB / T15102-2006). This indicates that the bamboo silk decorative material and medium density fiberboard composite decorative board provided by this embodiment can be used to manufacture a bamboo-wood composite decorative board with good performance.

[0113] In addition, the humidity control performance of the humidity control bamboo fiber decorative panel without a water absorption layer was measured. The measurement method is as follows:

[0114] In a room surrounded by walls, the total surface area of ​​the walls and ceiling is 100m 2 Calculation, without considering indoor ventilation and wall moisture absorption, assuming that the water vapor released by the indoor humidity source is absorbed by the humidity-adjustable bamboo silk decorative panel, according to the formula MBV 实际值 =△m / (S△RH) to calculate the amount of moisture absorbed (released) by the humidity-adjustable bamboo silk decorative panel in the room. Among them, △m is the mass change of the material in the moisture absorption / release range, g; S is the surface area of ​​the material m 2 , △RH is the change in relative humidity, %.

[0115] The results showed that the moisture absorption of the humidity-adjustable bamboo silk decorative panel was 421-537 and the moisture release was 335-390 within 10 hours; the moisture absorption was 792-889 and the moisture release was 436-475 within 20 hours.

[0116] In addition, a control group containing a water-absorbing layer was set up and tested according to the above method. The results showed that under the condition that the humidity-adjustable bamboo silk decorative panel contained a water-absorbing layer, the moisture absorption within 10 hours was 456-588, and the moisture release was 313-324; the moisture absorption within 20 hours was 805-900, and the moisture release was 419-454. It can be seen that after the water-absorbing layer is set up, the humidity-adjusting performance of the humidity-adjustable bamboo silk decorative panel can be further effectively adjusted, the moisture absorption is higher, the moisture release is lower, and the moisture release slow-release effect is more obvious.

[0117] This proves that the humidity-adjustable bamboo fiber decorative panel provided by the embodiment of the present invention has good environmental humidity-adjusting performance.

[0118] In summary, the humidity-adjustable bamboo silk decorative panel provided by the embodiment of the present invention has good visual effects, good mechanical properties and humidity-adjusting functions, and its preparation method is simple, easy to realize industrialized continuous production, and can greatly improve production efficiency and reduce production costs. It can be used in decoration or decorative products to improve the toughness, strength, stereoscopic vision and environmental performance of the decorative products.

[0119] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A humidity-adjustable bamboo silk decorative panel used in decoration or decorative products, characterized in that: It comprises a solid wood composite board layer, a bamboo silk decorative layer and a straw paper layer, wherein the bamboo silk decorative layer is arranged on the upper surface and / or the lower surface of the solid wood composite board layer, and the straw paper layer is arranged between the solid wood composite board layer and the bamboo silk decorative layer; the thickness of the straw paper layer does not exceed 1 mm; The solid wood strip composite board layer is made of multiple solid wood strips spliced ​​together, and each solid wood strip has a thickness of 8-12 mm and a density of 0.5-1 g / cm 3 The moisture content is 8-12%; the diameter of the bamboo silk in the bamboo silk decorative layer does not exceed 5mm, and the thickness of the bamboo silk is 1.5-2.5mm, and the density is 1-1.1g / cm 3 , moisture content is 8-12%; The humidity-adjustable bamboo silk decorative panel further comprises a transition layer, which is arranged between the straw paper layer and the bamboo silk decorative layer and has a thickness of no more than 0.5 mm; the transition layer comprises a flame retardant layer, a water absorbing layer, an insect-proof layer and a buffer layer; The transition layer is a water-absorbing layer, which is composed of a plurality of nano-scale microcapsules, each of which includes a water-absorbing resin located in the inner layer and a coating covering the surface of the water-absorbing resin; The transition layer is a flame retardant layer, and the raw materials of the flame retardant layer are composed of antimony trioxide and red phosphorus in a weight ratio of 1-1.5:0.6-0.8; The preparation of the humidity-adjustable bamboo silk decorative panel comprises the following steps: soaking straw paper in a first glue, placing the soaked straw paper between the solid wood strip composite board layer and the bamboo silk decorative layer to obtain a slab; then pressing the slab, and performing segmented pressure relief and curing in sequence; The straw paper is soaked in soybean vegetable protein glue until the amount of the straw paper soaked in glue is 100-120g / m 2 ; Pressing includes cold pressing and hot pressing. Cold pressing is the first pressing at 20-30°C and a pressure of 0.4-0.6MPa for 1.5-2.5h, and hot pressing is the second pressing at 100-115°C and a pressure of 1-1.2MPa for 8-12min.

2. A method for preparing a humidity-adjustable bamboo silk decorative panel used in decoration or decorative products as claimed in claim 1, characterized in that: The steps include: Soaking straw paper in the first glue, placing the soaked straw paper between the solid wood strip composite board layer and the bamboo silk decorative layer to obtain a slab; then pressing the slab, and performing segmented pressure relief and curing in sequence; The straw paper is soaked in soybean vegetable protein glue until the amount of the straw paper soaked in glue is 100-120g / m 2 ; Pressing includes cold pressing and hot pressing. Cold pressing is the first pressing at 20-30°C and a pressure of 0.4-0.6MPa for 1.5-2.5h, and hot pressing is the second pressing at 100-115°C and a pressure of 1-1.2MPa for 8-12min.

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