Plastic-wood co-extrusion reflective sheet

Abstract

This utility model provides a wood-plastic composite co-extruded reflector, relating to the field of building materials technology, comprising: a wood-plastic composite co-extruded matrix; and intelligent light-emitting components embedded on the left and right sides of the wood-plastic composite co-extruded matrix, used to actively emit light according to ambient light conditions. The intelligent control component can automatically turn the LED light source on and off according to the ambient light intensity, ensuring that the light emission behavior is precisely adapted to day and night changes or changes in brightness, achieving the performance of being bright when needed and dim when appropriate. Simultaneously, utilizing a composite functional material layer, during the day, the photochromic layer changes color under ultraviolet light, shielding the intelligent control component below, making the product visually indistinguishable from ordinary wood-plastic composite boards, while the long-afterglow layer stores energy. At night, the photochromic layer returns to transparency, not only ensuring the efficient transmission of the main LED light source but also releasing the energy stored in the long-afterglow layer, forming a dual, relay-style light emission guarantee of active LED lighting and passive long-afterglow emission, greatly improving the product's functional reliability and emergency safety.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, and in particular to a wood-plastic co-extruded reflector. Background Technology

[0002] Wood-plastic composite materials, due to their advantages such as environmental friendliness, weather resistance, and strong decorative properties, have been widely used in outdoor boardwalks, fences, and landscape facilities. To improve their visibility and safety in low-light environments...

[0003] Existing technologies often involve adding reflective or fluorescent coatings to the surface of wood-plastic composites (WPC). However, these passive reflective solutions have significant drawbacks: their reflective effect relies entirely on external light sources, rendering them ineffective in low-light or dark environments; furthermore, during the day or in bright light, their reflective surfaces may produce glare, causing light pollution. On the other hand, luminous signage products using active light sources such as LEDs have emerged in the market, but most are independent electronic devices requiring external power supplies, have complex structures, are difficult to integrate with WPC materials, and typically lack environmental sensing capabilities, failing to automatically adjust according to day and night changes, resulting in energy waste or poor lighting performance. In addition, while traditional fluorescent or photoluminescent materials can emit a faint glow in the dark, their brightness is low, their duration is short, and they often exhibit noticeable discoloration during the day, affecting the overall aesthetics. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing an integrated wood-plastic co-extruded reflector that has environmental perception and intelligent response capabilities, achieves both efficient active light emission and long-lasting passive light emission, and is completely invisible during the day.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a wood-plastic co-extruded reflector, comprising: Wood-plastic composite co-extruded matrix; The intelligent light-emitting component is embedded on both sides of the wood-plastic co-extruded matrix and is used to actively emit light according to the ambient light conditions. The intelligent light-emitting component has a composite functional material layer, which is laminated to a pre-set light-transmitting area of ​​the wood-plastic co-extruded matrix. The intelligent light-emitting component also includes a light-emitting strip, which is installed in the side grooves at both ends of the wood-plastic co-extruded matrix.

[0006] Preferably, the intelligent light-emitting component further includes: The sensing element is used to monitor ambient light intensity in real time. The control unit, which is electrically connected to the sensing unit, is used to receive light intensity signals and compare them with a preset threshold to generate control commands; An actuator, electrically connected to the control unit, is used to turn the light on or off according to a control command.

[0007] Preferably, the actuator is at least one of an LED light strip, a surface-mount LED, or a side-emitting optical fiber.

[0008] Preferably, the composite functional material layer is a two-layer composite structure, comprising: The lower long-afterglow luminescent layer is composed of a wood-plastic co-extruded material with a composite long-afterglow luminescent material. The upper photochromic layer, covering the long afterglow luminescent layer, is composed of a wood-plastic co-extruded material incorporating photochromic materials. The photochromic layer changes color under ultraviolet light to cover or fuse with the long-afterglow luminescent layer, and returns to transparency in the absence of ultraviolet light to allow the light from the long-afterglow luminescent layer to pass through.

[0009] Preferably, the composite functional material layer is positioned corresponding to the light-emitting area of ​​the intelligent light-emitting component, and the composite functional material layer is disposed on the surface of the light-emitting strip.

[0010] Preferably, the control component and the actuator are electrically connected to a miniaturized control circuit on their sides, and are encapsulated together with the power supply configured to power the intelligent light-emitting component, and are pre-embedded in the wood-plastic co-extruded matrix in a modular form.

[0011] Preferably, a base plate is installed at the bottom of the wood-plastic co-extruded substrate, multiple sets of fasteners are equally distributed at the connection end of the wood-plastic co-extruded substrate and the light-emitting strip, and a connecting adhesive is applied to the connection between the wood-plastic co-extruded substrate and the light-emitting strip.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] In this invention, an intelligent control component enables the LED light source to automatically turn on and off based on ambient light intensity, ensuring precise adaptation of luminous behavior to day and night changes or variations in ambient light, achieving intelligent performance by being bright when needed and dim when appropriate. Simultaneously, a composite functional material layer allows the photochromic layer to display color under ultraviolet light during the day, cleverly concealing the underlying intelligent control component, making the product visually indistinguishable from ordinary wood-plastic composite panels. Meanwhile, the long-afterglow layer stores energy. At night, the photochromic layer returns to transparency, ensuring efficient transmission of the main LED light source and releasing the energy stored in the long-afterglow layer. This creates a dual, relay-style luminous protection system of active LED lighting and passive long-afterglow illumination, greatly enhancing the product's functional reliability and emergency safety. Furthermore, all electronic components and functional layers are deeply integrated with the wood-plastic composite matrix through co-extrusion, pre-embedding, and sealing processes, ensuring excellent integrity, weather resistance, and waterproof and dustproof capabilities, making the product suitable for long-term outdoor use. Attached Figure Description

[0014] Figure 1This utility model provides a three-dimensional structural diagram of a wood-plastic co-extruded reflector. Figure 2 This utility model provides a side-end cross-sectional view of the wood-plastic co-extruded matrix in a wood-plastic co-extruded reflector. Figure 3 This utility model provides a schematic diagram of the layer hierarchy of composite functional materials in a wood-plastic co-extruded reflector; Figure 4 This invention provides a demonstration diagram of environmental changes in a wood-plastic co-extruded reflector.

[0015] Legend: 100, baseboard; 200, wood-plastic co-extruded matrix; 300, intelligent light-emitting component; 301, light-emitting strip; 302, sensing element; 303, miniaturized control circuit; 304, actuator; 305, long afterglow light-emitting layer; 306, photochromic layer; 400, fastener. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1, in this example, as Figures 1-4As shown, this utility model provides a wood-plastic co-extruded reflector, including: a wood-plastic co-extruded substrate 200; and an intelligent light-emitting component 300, which is embedded in the left and right sides of the wood-plastic co-extruded substrate 200 for actively emitting light according to ambient light conditions. The intelligent light-emitting component 300 has a composite functional material layer, which is laminated to a preset light-transmitting area of ​​the wood-plastic co-extruded substrate 200. The intelligent light-emitting component 300 also includes a light-emitting strip 301, which is installed in the side grooves at both ends of the wood-plastic co-extruded substrate 200 (the light-emitting strip 301 is securely installed in the side grooves). The light-emitting strip 301 serves as the main light source, and its physical form can be one or more combinations of high-brightness LED strips, surface-mount LED arrays, or side-emitting optical fibers to ensure sufficient light emission effect. The intelligent light-emitting component 300 further includes: a sensing element 302 (using a miniature photoresistor or ambient light sensor) for real-time monitoring of ambient light intensity; a control element electrically connected to the sensing element 302 for receiving light intensity signals and comparing them with a preset threshold to generate control commands; and an actuator 304 electrically connected to the control element for turning the light emission on or off according to the control commands. The actuator 304 is at least one of an LED strip, a surface-mount LED, or a side-emitting optical fiber. The composite functional material layer has a two-layer composite structure, including: a lower long-afterglow luminescent layer 305, composed of a wood-plastic co-extruded material incorporating a long-afterglow luminescent material (this layer is co-extruded from a transparent or translucent wood-plastic co-extruded material and a long-afterglow luminescent material. It is used to absorb and store light energy under light conditions); and an upper photochromic layer 306, covering the long-afterglow luminescent layer 305, composed of a wood-plastic co-extruded material incorporating a photochromic material (i.e., the photochromic layer 306 is directly covered on the long-afterglow luminescent layer 305, co-extruded from a transparent wood-plastic co-extruded material and a photochromic material. It is used to deepen the material color or display a specific color under ultraviolet (mainly sunlight) excitation; when there is no ultraviolet irradiation, it returns to a transparent state); wherein, the photochromic layer 306 changes color under ultraviolet irradiation to cover or integrate with the long-afterglow luminescent layer 305, and returns to transparency in the absence of ultraviolet environment to allow the light of the long-afterglow luminescent layer 305 to pass through. The composite functional material layer is positioned corresponding to the light-emitting area of ​​the intelligent light-emitting component 300, and is located on the surface of the light-emitting strip 301. A miniaturized control circuit 303 is integrated and electrically connected to the side of the control and actuator 304, and is co-encapsulated with the power supply configured to power the intelligent light-emitting component 300. This is pre-embedded in the wood-plastic co-extruded substrate 200 in a modular form (i.e., the miniaturized control circuit 303 is directly electrically soldered to the signal output terminal of the sensing element 302, the power control terminal of the actuator 304, and the positive and negative power supply terminals of the power module via conductive lines (such as copper traces) on it).This allows the resulting integration to be compactly packaged within a sealed housing, enabling reliable connection with the sensing element 302, the actuating element 304, and the pre-embedded power supply, thus forming an integrated and modular packaging approach.

[0019] First, when it is daytime or there is sufficient ambient light, the sensing element 302 continuously monitors whether the ambient light intensity is higher than a preset threshold in the control element (e.g., a level representing sufficient illuminance). Then, the control element sends a shutdown command to the actuator 304 via the miniaturized control circuit 303. Subsequently, the actuator 304 cuts off the power supply to the light-emitting strip 301, completely extinguishing active light sources such as LEDs. At this time, from an external perspective, the product does not produce any active artificial light, avoiding the glare pollution caused by traditional reflective materials during the day. Simultaneously, changes occur in the composite functional material layer: on the one hand, the ultraviolet components in sunlight activate the upper photochromic layer 306, causing its molecular structure to change and its color to deepen, thereby visually covering or subtly integrating any background color that may exist in the lower long-afterglow luminescent layer 305, making the side area appear seamlessly integrated with the wood-plastic composite substrate during the day. On the other hand, sunlight (including its visible light portion) can penetrate the color-changing photochromic layer 306 and be effectively absorbed and stored by the lower long-afterglow luminescent layer 305, completing the chemical energy storage. When night falls or ambient light drops below a preset threshold, the sensing element 302 detects this change immediately. Then, the sensing element 302 transmits the signal to the control element. After judgment, the control element immediately drives the actuator 304 to operate via the miniaturized control circuit 303. Subsequently, the actuator 304 automatically turns on the power to the light-emitting strip 301, causing it to emit bright, controllable LED light. Simultaneously, due to the disappearance of ambient ultraviolet light, the upper photochromic layer 306 begins to regain transparency. Firstly, this eliminates the filtering and blocking of light from the light-emitting strip 301, allowing the LED light to pass through efficiently, achieving the best warning effect; secondly, the lower long-afterglow light-emitting layer 305, which was fully charged during the day, begins to slowly release its stored light energy, emitting a soft, continuous afterglow, as its surface photochromic layer 306 becomes transparent. Thus, in dim environments, the side area provides dual illumination protection with both main light (intelligent LED) and auxiliary light (long afterglow). This allows the smart LED to provide immediate and bright active lighting, while the long-afterglow material can still provide several hours of emergency light in case the LED light source fails or runs out of power, greatly improving the product's reliability. When the environment brightens again (such as at dawn), the sensor 302 detects that the light intensity has risen above the threshold. The process restarts, with the controller issuing a command to the actuator 304 to turn off the light-emitting strip 301. At the same time, the reappearance of ultraviolet light causes the photochromic layer 306 to change color and cover again, and the long-afterglow light-emitting layer 305 also ends its afterglow release and re-enters the light absorption and energy storage state. The entire system thus automatically and seamlessly resets to the first stage of the invisible energy storage state, awaiting the next cycle.

[0020] The thickness of the long-afterglow layer is designed to accommodate sufficient luminescent material, ensuring effective absorption and storage of light energy during the day, thus providing several hours of continuous afterglow at night. The thickness of the photochromic layer covering it, however, needs to balance two performance aspects: First, it ensures that under daytime ultraviolet excitation, a sufficiently significant and uniform color change can occur to cover the lower afterglow luminescent layer; Secondly, when transparency is restored at night, its impact on the transmittance of active light emission (light strip) and passive afterglow is minimized.

[0021] In this embodiment, the thickness ratio of the long afterglow layer 305 to the photochromic layer 306 is preferably in the range of 1:0.2 to 1:1, so as to achieve an optimized balance between light storage efficiency and day and night visual effects.

[0022] Furthermore, specifically, such as Figures 1-4 As shown, a base plate 100 is installed at the bottom of the wood-plastic composite co-extruded substrate 200. Multiple sets of fasteners 400 are evenly distributed at the connection end between the wood-plastic composite co-extruded substrate 200 and the light-emitting strip 301, and a bonding adhesive is applied to the connection point between the wood-plastic composite co-extruded substrate 200 and the light-emitting strip 301. To further ensure the stability and durability of the structure, multiple sets of fasteners 400 are evenly distributed at the connection end between the wood-plastic composite co-extruded substrate 200 and the light-emitting strip 301, providing reliable mechanical locking. Simultaneously, a high-performance bonding adhesive is applied to the joint between the two, achieving excellent sealing and waterproof / dustproof effects, protecting internal electronic components and circuits, and ensuring the entire device can operate stably for a long time in complex outdoor environments.

[0023] It should be noted that the usage method of this solution is as follows: S1: First, ambient light intensity data is continuously acquired through the sensing element 302; S2: The controller then compares the ambient light intensity data with the preset dim environment threshold. S3: When the ambient light intensity is lower than the threshold, the controller generates the first control command to drive the actuator 304 to emit light; S4: When the ambient light intensity is higher than the threshold, the controller generates a second control command to shut down the actuator 304.

[0024] More specifically, the above-mentioned usage method also includes an energy cycling step: S5. During the illumination phase where the ambient light intensity is higher than the threshold, the long afterglow luminescent layer 305 absorbs and stores light energy. S6. In the dim stage where the ambient light intensity is below the threshold, the long afterglow luminescent layer 305 releases the stored light energy to emit light continuously. The light emitted by the intelligent light-emitting component 300 serves as the main light source during dim periods, while the light emitted by the long afterglow light-emitting layer 305 serves as an auxiliary or emergency light source.

[0025] More specifically, during the overall fabrication process of the device: First, a wood-plastic composite co-extruded matrix 200 with reserved positions is formed through a co-extrusion process; Next, the intelligent light-emitting component 300, which integrates the sensing element 302, the control element and the actuating element 304, is encapsulated and embedded in the reserved position (i.e. the side grooves at both ends of the wood-plastic co-extruded matrix 200). Subsequently, a composite functional material layer is formed on the preset surface area of ​​the light strip 301 through co-extrusion or lamination processes.

[0026] To further clarify, in this plan, if Figure 1 The layered structure of the baseboard 100 and the wood-plastic composite co-extruded matrix 200 shown is merely a preferred and specific physical carrier form for realizing the technical solution of this utility model, and is not the only limitation on the overall structure of the product. Furthermore, the installation method of the intelligent light-emitting component 300 is not limited to the side groove. Depending on the product design requirements, it can be pre-embedded under a specific pattern on the front or back of the board, or completely encapsulated within the wood-plastic composite material as an independent strip module through a co-extrusion process. Similarly, the fixing method is not limited to the combination of the clip 400 and the connecting adhesive; it can also be a nested slot, ultrasonic welding, or direct one-time molding and encapsulation through a co-extrusion process.

[0027] In summary, the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A wood-plastic co-extruded reflector, characterized in that, include: Wood-plastic co-extruded matrix (200); The intelligent light-emitting component (300) is embedded on the left and right sides of the wood-plastic co-extruded matrix (200) and is used to actively emit light according to the ambient light conditions. The intelligent light-emitting component (300) has a composite functional material layer, which is composited in the pre-set light-transmitting area of ​​the wood-plastic co-extruded matrix (200). The intelligent light-emitting component (300) also includes a light-emitting strip (301), which is installed in the side grooves at both ends of the wood-plastic co-extruded matrix (200).

2. The wood-plastic co-extruded reflector according to claim 1, characterized in that: The intelligent light-emitting component (300) also includes: The sensing element (302) is used to monitor ambient light intensity in real time; The control unit, which is electrically connected to the sensing unit (302), is used to receive the light intensity signal and compare it with a preset threshold to generate a control command; The actuator (304) is electrically connected to the control element and is used to turn the light on or off according to the control command.

3. The wood-plastic co-extruded reflector according to claim 2, characterized in that: The actuator (304) is at least one of an LED strip, a surface-mount LED, or a side-emitting optical fiber.

4. The wood-plastic co-extruded reflector according to claim 1, characterized in that: The composite functional material layer is a two-layer composite structure, comprising: The lower long-afterglow luminescent layer (305) is composed of a wood-plastic co-extruded material with a composite long-afterglow luminescent material. The upper photochromic layer (306) covers the long afterglow luminescent layer (305) and is composed of a wood-plastic co-extruded material with photochromic material. The photochromic layer (306) changes color under ultraviolet irradiation to cover or fuse with the long afterglow luminescent layer (305), and returns to transparency in the absence of ultraviolet light so that the light of the long afterglow luminescent layer (305) can pass through.

5. The wood-plastic co-extruded reflector according to claim 1, characterized in that: The position of the composite functional material layer corresponds to the light-emitting area of ​​the intelligent light-emitting component (300), and the composite functional material layer is located on the surface of the light-emitting strip (301).

6. The wood-plastic co-extruded reflector according to claim 2, characterized in that: The control unit and the actuator (304) are electrically connected to a miniaturized control circuit (303) on their side ends, and are encapsulated together with the power supply configured to power the intelligent light-emitting component (300) in a modular form within the wood-plastic co-extruded matrix (200).

7. The wood-plastic co-extruded reflector according to claim 1, characterized in that: The bottom of the wood-plastic co-extruded substrate (200) is provided with a base plate (100), and multiple sets of fasteners (400) are equally distributed at the connection end of the wood-plastic co-extruded substrate (200) and the light-emitting strip (301). The connection between the wood-plastic co-extruded substrate (200) and the light-emitting strip (301) is coated with a connecting adhesive.

Images