Light-transmitting veneer (bamboo) laminated glass and preparation method thereof

Abstract

The invention provides light-transmitting veneer (bamboo) laminated glass and a preparation method thereof, and belongs to the field of novel composite building materials. The invention aims to solve the problems that in the prior art, laminated glass is single in decoration and lacks natural aesthetic elements, and a light-transmitting wood material is insufficient in strength, easy to warp and not resistant to scraping on the surface. The light-transmitting veneer (bamboo) laminated glass comprises upper layer glass, a first bonding layer, a light-transmitting veneer (bamboo) layer, a second bonding layer and lower layer glass which are sequentially stacked from top to bottom. The preparation method is characterized by comprising the following steps: firstly, preparing the light-transmitting veneer (bamboo) layer in a manner of dipping or roller-coating UV resin and curing; then, high-viscosity UV resin is used as an adhesive, the light-transmitting veneer (bamboo) layer is attached to the upper glass layer and the lower glass layer in a vacuum environment, ultraviolet curing is conducted, and finally the integrated composite board structure is formed. The product prepared by the invention has unique texture of natural wood (bamboo), soft and light-transmitting aesthetics of wood and physical and mechanical properties of water resistance, high strength, high weather resistance and the like of glass, and can be widely applied to the fields of building doors and windows, curtain walls, indoor decoration partitions, high-end furniture, table tops, electric appliance panels or automotive trim parts and the like.

Description

Technical Field

[0001] This invention relates to the field of composite materials and building materials technology, specifically to a novel laminated glass that combines translucent wood (bamboo) materials with glass and its preparation method. Background Technology

[0002] Laminated glass, a type of safety glass, typically consists of one or more polymer interlayers (such as PVB, EVA, SGP, etc.) sandwiched between two or more panes of glass, bonded together under high temperature and pressure. It offers excellent impact resistance, sound insulation, and safety; even if broken, the fragments are held together by the interlayer, preventing them from scattering and causing injury. Therefore, laminated glass is widely used in building curtain walls, doors and windows, roofs, railings, and car windshields.

[0003] To enhance decorative appeal, existing technologies employ processes that sandwich materials such as silk, paper, fabrics, or decorative films between glass. However, these materials have limitations in terms of weather resistance, durability, texture, and aesthetic uniqueness; for example, they are prone to fading, have a cheap feel, or lack natural vitality. Translucent wood (bamboo) is a novel bio-based functional material that has emerged in recent years. It is created by impregnating the delignified wood cell skeleton with transparent resin, imparting light transmission while preserving the natural texture of the wood, thus possessing unique aesthetic value and ecological significance. However, as an organic material, translucent wood (bamboo) still falls short of glass in terms of hardness, wear resistance, weather resistance, and dimensional stability, limiting its standalone application in situations requiring high strength and durability.

[0004] The technical problem this invention aims to solve is how to organically combine the unique aesthetic value of translucent wood (bamboo) with the excellent physical properties of glass to create a new type of composite material that combines natural decorative effects with robust and practical performance. Summary of the Invention

[0005] One of the objectives of this invention is to provide a translucent thin wood (bamboo) laminated glass that retains the natural texture and soft light transmission characteristics of translucent wood (bamboo) while possessing the strength, hardness, and weather resistance of glass.

[0006] Another objective of this invention is to provide a method for preparing the above-mentioned translucent thin wood (bamboo) laminated glass, which is a process that is controllable and efficient, and can achieve a high-strength, high-transparency permanent bond between the translucent thin wood and the glass.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A translucent thin wood (bamboo) laminated glass comprises an upper glass layer, a first adhesive layer, a translucent thin wood (bamboo) layer, a second adhesive layer, and a lower glass layer, stacked sequentially. The translucent thin wood (bamboo) layer is a translucent composite material made from natural wood veneer or bamboo veneer modified with resin (preferably UV-curable resin) and then cured. The first and second adhesive layers are formed by curing with UV-curable resin.

[0009] Preferably, the viscosity of the high-viscosity UV resin used for the adhesive layer is higher than that of the UV resin used to prepare the translucent thin wood (bamboo) layer, so as to ensure that the resin does not flow excessively during the vacuum degassing process, resulting in insufficient glue, while fully filling the gaps.

[0010] The present invention also provides a method for preparing the aforementioned translucent thin wood laminated glass, comprising the following steps:

[0011] (1) Prepare a translucent thin wood (bamboo) layer using existing impregnation or roller coating processes;

[0012] (2) Apply a layer of high-viscosity UV resin by scraping or rolling onto the clean inner surface of the upper glass;

[0013] (3) Lay the cut translucent thin wood (bamboo) layer flat on the uncured resin layer;

[0014] (4) Apply a second layer of high-viscosity UV resin to the surface of the translucent thin wood (bamboo) layer by scraping or rolling;

[0015] (5) Cover with a clean lower glass layer to form a five-layer pre-assembled structure consisting of “glass-resin-transparent thin wood (bamboo)-resin-glass”;

[0016] (6) Place the pre-assembled body in a vacuum bag or vacuum laminator, evacuate to the specified negative pressure and maintain it for a certain time to remove interlayer air bubbles and make the resin flow evenly.

[0017] (7) Under the condition of maintaining vacuum or applying a certain pressure, the pre-assembled body is irradiated with ultraviolet light to completely cure the high viscosity UV resin, thereby firmly bonding the glass and the translucent thin wood (bamboo) into a whole.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Integration of Aesthetics and Function: The product perfectly presents the unique texture of natural wood or bamboo, while also possessing light-transmitting properties, creating a brand-new visual effect of light and shadow, and deeply integrating natural aesthetics with modern building materials.

[0020] 2. Superior performance: The outer glass layer provides extremely high surface hardness, wear resistance, scratch resistance, and weather resistance (UV resistance and temperature and humidity change resistance), effectively protecting the inner translucent veneer (bamboo); the UV resin adhesive layer has the advantages of high bonding strength, good transparency, aging resistance, and rapid curing; the overall structure is safe, and even if the glass breaks, the fragments are still fixed by the adhesive layer.

[0021] 3. Advanced and environmentally friendly process: Utilizing UV curing technology, it features low energy consumption, high efficiency, and virtually no volatile organic compound emissions, making it environmentally friendly. The vacuum lamination process ensures that the finished product is bubble-free and has excellent optical properties.

[0022] 4. Broad application prospects: This product can be widely used in scenarios that require both aesthetics and performance, such as high-end building facades and interior partitions, decorative windows in museums / exhibition halls, luxury store windows, smart home interactive panels, art installations, and high-end furniture tabletops.

[0023] The above content is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is an exploded view of the structure of the translucent thin wood (bamboo) laminated glass of the present invention.

[0025] Figure 2 This is a process flow diagram of the preparation method of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] Specific implementation examples are shown below.

[0028] Example 1: Preparation of laminated glass based on translucent veneer using impregnation method, including the following steps:

[0029] (1) Preparation of translucent veneer: 0.5 mm thick white oak veneer was selected and treated with a 2 wt% sodium chlorite solution at 80°C for 6 hours to remove lignin. After washing, it was dried. The treated veneer was placed in a vacuum impregnation tank and injected with low-viscosity transparent UV resin (viscosity about 200-500 cps) and impregnated at -0.095 MPa for 30 minutes. After removal, the surface glue was wiped off and cured under 1000 mJ / cm² ultraviolet light to obtain translucent veneer, which was then cut into the required size.

[0030] (2) Laminated glass assembly: Take two pieces of 5mm thick ultra-clear tempered glass, clean and dry them. On the inner surface of one of the glass pieces, use a scraper to evenly apply a layer of high-viscosity UV adhesive (viscosity about 5000-10000cps, thickness about 0.5mm).

[0031] (3) Laying and applying a second layer of adhesive: Lay the cut translucent veneer flat on the adhesive layer and gently press to remove large air bubbles. Apply another layer of the same high-viscosity UV adhesive to the surface of the translucent veneer.

[0032] (4) Assembly and vacuum degassing: Cover with another piece of ultra-white tempered glass to form a pre-assembled body. Place it in a vacuum bag, evacuate to -0.09MPa and maintain for 20 minutes to allow the adhesive layer to flow evenly and fully expel the interlayer gas.

[0033] (5) UV curing: Under vacuum conditions, a UV LED surface light source with a main peak wavelength of 365nm is used to irradiate from one side of the glass, with a cumulative exposure energy of 1500mJ / cm², so that the UV adhesive is completely cured.

[0034] (6) Post-processing: After curing, remove the vacuum, take out the product, and clean the edges to obtain the translucent thin wood laminated glass product. This product has soft light transmission, clear wood grain, and strong adhesion.

[0035] Example 2: Preparation of laminated glass based on translucent veneer using roll coating, comprising the following steps:

[0036] (1) Preparation of translucent veneer: Select 0.3 mm thick maple veneer, dry it at 100℃ until completely dry, and immerse it in anhydrous ethanol overnight for later use. After taking it out, wipe the surface ethanol dry with a paper towel, and use a wire bar coater to roll-coat a layer of low-viscosity UV resin about 80 μm thick on one side. Spread it flat in a vacuum drying oven and vacuum-treat it at room temperature (-0.1 MPa) for 6 hours. Then place it in a UV curing oven and irradiate it for 3 minutes to cure the resin, thus obtaining translucent veneer.

[0037] (2) Laminated glass assembly and curing: The subsequent steps are basically the same as in Example 1, using the same high-viscosity UV adhesive. After degassing in a vacuum bag at -0.085MPa for 15 minutes, UV curing is performed (energy 1200mJ / cm²). The resulting product also exhibits good light transmittance and strong bonding strength, and retains the original tactile feel of roller-coated veneer.

[0038] Example 3: Preparation of laminated glass based on translucent thin bamboo using roll coating, including the following steps:

[0039] (1) Preparation of translucent thin wood layer: Select 0.3 mm thick side-pressed bamboo, dry it at 100℃ until completely dry, and soak it in anhydrous ethanol overnight for later use. After taking it out, wipe the surface ethanol dry with a paper towel, and use a wire bar coater to roll-coat a layer of low viscosity UV resin about 80 μm thick on one side. Spread it flat in a vacuum drying oven and vacuum it at room temperature (-0.1 MPa) for 6 hours. Then put it in a UV curing oven and irradiate it for 3 minutes to cure the resin, thus obtaining translucent thin bamboo.

[0040] (2) Laminated glass assembly and curing: The subsequent steps are basically the same as in Example 1, using the same high-viscosity UV adhesive. After venting at -0.085MPa for 15 minutes in a vacuum bag, UV curing is performed (energy 1200mJ / cm²). The resulting product also exhibits good light transmittance and strong bonding strength, and retains the original feel of the thin bamboo produced by roller coating.

[0041] Example 4: Preparation of curved laminated glass, including the following steps:

[0042] (1) Light-transmitting thin wood (bamboo) was prepared using the method of Example 1, 2 or 3.

[0043] (2) Select two pieces of 3mm thick tempered glass that have been pre-bent into the same arc as the upper and lower layers.

[0044] (3) During the assembly and gluing process, auxiliary positioning is required on the matching arc mold to ensure that each layer adheres.

[0045] (4) The vacuum degassing and UV curing steps are similar to those in Example 1. It is necessary to ensure that the UV light can be evenly irradiated to the entire curved surface area.

[0046] (5) This allows for the production of translucent thin wood (bamboo) laminated glass with curved surfaces, expanding its design and application possibilities.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A translucent thin wood (bamboo) laminated glass, characterized in that, It includes an upper glass layer, a first adhesive layer, a light-transmitting thin wood (bamboo) layer, a second adhesive layer, and a lower glass layer, which are stacked in sequence. The light-transparent thin wood layer is a light-transparent composite material made of natural wood veneer or bamboo veneer that has been modified with resin and then cured. The resin is a UV-curable resin.

2. The first adhesive layer and the second adhesive layer are formed by curing with ultraviolet light-curing resin.

3. The translucent thin wood laminated glass according to claim 1, characterized in that, The method for preparing the translucent thin wood (bamboo) layer includes the following steps: applying ultraviolet-curing resin to the dried wood veneer or bamboo veneer by impregnation or roller coating, followed by ultraviolet curing irradiation treatment.

4. The translucent thin wood (bamboo) laminated glass according to claim 2, characterized in that, The method for preparing the translucent thin wood (bamboo) layer includes a chemical treatment step of removing lignin from the wood veneer or bamboo veneer before applying the resin; or, it includes a step of immersing the wood veneer or bamboo veneer in ethanol.

5. The translucent thin wood (bamboo) laminated glass according to claim 1, characterized in that, The viscosity of the UV-curable resin used to form the first and second adhesive layers is higher than the viscosity of the UV-curable resin used to prepare the translucent thin wood (bamboo) layer.

6. The translucent thin wood (bamboo) laminated glass according to claim 1, characterized in that, The upper and lower glass layers are independently one of float glass, ultra-clear glass, tempered glass, semi-tempered glass, glazed glass, or laminated glass.

7. The translucent thin wood (bamboo) laminated glass according to any one of claims 1-5, characterized in that, The thickness of the translucent thin wood layer (bamboo) is 0.1mm-1mm, and the thickness of the first adhesive layer and the second adhesive layer is 0.1mm-2mm.

8. A method for preparing translucent thin wood (bamboo) laminated glass as described in any one of claims 1-6, characterized in that, Includes the following steps: (1): Preparation of translucent thin wood layer (bamboo); (2): A high-viscosity ultraviolet-curable resin is coated on the inner surface of the upper glass to form a first resin layer; (3): The translucent thin wood (bamboo) layer is laid on the first resin layer; (4): The high-viscosity UV-curable resin is coated on the translucent thin wood (bamboo) layer to form a second resin layer; (5): The lower glass layer is placed on the second resin layer to form a pre-assembled laminate; (6): The laminate is subjected to vacuum degassing treatment and then ultraviolet irradiation to cure the high viscosity ultraviolet curing resin, forming the first adhesive layer and the second adhesive layer.

9. The method according to claim 7, characterized in that, In step (6), the vacuum exhaust process is carried out in a vacuum bag or a vacuum laminator, with a vacuum degree of -0.08MPa to -0.1MPa and a processing time of 10-60 minutes.

10. The method according to claim 7, characterized in that, In step (6), the wavelength of the ultraviolet light irradiation is 320-400nm, and the cumulative exposure energy is 500-3000mJ / cm².

11. The application of a translucent thin wood (bamboo) laminated glass as described in any one of claims 1-6 in building doors and windows, curtain walls, interior decorative partitions, furniture tabletops, appliance panels or automotive interior components.

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