High-weather-resistance polycarbonate striped plate and preparation method thereof

Abstract

The invention discloses a high-weather-resistance polycarbonate striped plate and a preparation method thereof. The high-weather-resistance polycarbonate striped plate comprises acrylic, polycarbonate and a striped three-layer structure embedded in the polycarbonate. By compounding the three layers of structures, the excellent weather resistance and light transmission of an acrylic material are successfully reserved, the composite board can keep good optical performance and color stability in long-term outdoor use and effectively resist ultraviolet erosion, the polycarbonate layer is fused, the composite board is endowed with high impact resistance, bird impact can be effectively prevented, fragment splashing can be effectively prevented, and the service life of the composite board is prolonged. The polycarbonate layer and the reasonable material formula design enable the composite board to have high flame retardance and high heat resistance, the unique preparation process ensures that all the layers of materials are tightly combined, the reasonable arrangement of the stripe layer further enhances the structural strength of the board, the performance is ensured, meanwhile, the overall stability and durability of the board are improved, and the service life of the board is prolonged. Therefore, the composite material has higher application value in the fields of buildings, traffic sound barriers and the like, and meets diversified engineering requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of inlaid stripe plates, and more specifically, to a highly weather-resistant polycarbonate stripe plate and a preparation method thereof. Background Art

[0002] In the fields of architecture, traffic sound barriers, etc., polymer transparent acrylic and polycarbonate plates are commonly used materials. Although polymer transparent acrylic has good sound insulation and light transmission properties and stable outdoor colors, it has poor impact resistance, is prone to cracking and falling off, has heat resistance limitations (the long-term use temperature generally does not exceed 70°C), is prone to deformation, and has poor flammability and fire prevention. Polycarbonate plates have excellent impact resistance, heat resistance, light transmission, and dimensional stability. However, their ultraviolet resistance is weaker than that of acrylic, the surface scratch resistance is insufficient, and they are easily eroded by wind, sand, rain, and water outdoors, resulting in poor durability. Existing acrylic plates have deficiencies in heat resistance, impact resistance, and fire prevention; although polycarbonate plates have a surface anti-UV coating to improve weather resistance, they are still difficult to solve the problem of polycarbonate wind erosion, and the outdoor anti-yellowing service life is short.

[0003] Therefore, it is necessary to invent a highly weather-resistant polycarbonate stripe plate and a preparation method thereof to solve the above problems. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a highly weather-resistant polycarbonate stripe plate and a preparation method thereof. Through a unique multi-layer structure design and material combination, the deficiencies of existing materials in terms of weather resistance, impact resistance, heat resistance, and fire prevention are effectively solved, and the comprehensive performance of the plate is improved.

[0005] To achieve the above object, the present invention provides the following technical solution: A highly weather-resistant polycarbonate stripe plate, made by an in-mold composite process, includes a multi-layer structure of an acrylic layer, a polycarbonate layer, and a stripe layer. The thickness of the acrylic layer is 300μm - 5000μm, and it is composed of any one or a mixture of two of polymethyl methacrylate and polybutyl methacrylate and blended with 0% - 5% ultraviolet absorber; the thickness of the polycarbonate layer is 1mm - 30mm, and it is composed of 90% - 100% bisphenol A polycarbonate, 0% - 2% ultraviolet absorber, and 0% - 0.5% antioxidant; the stripe diameter is 1mm - 5mm.

[0006] As a further description of the above technical solution, the stripe material is composed of a blend of one or at least two of polyamide, polyimide, polyacrylonitrile, polypropylene and its copolymers, polyethylene and its copolymers, polyvinyl chloride, polystyrene and its copolymers, saturated polyester, polyurethane, and polyaryletherketone; As a further description of the above technical solution, the ultraviolet absorber in the acrylic layer is one or a composition of at least two of benzophenone-based, benzotriazole-based, triazine-based or salicylate ultraviolet absorbers, and its mass proportion in the acrylic layer material is 0% - 5%; As a further description of the above technical solution, the antioxidant in the polycarbonate layer is a hindered phenol antioxidant, and its mass proportion in the polycarbonate layer material is 0% - 0.5%; As a further description of the above technical solution, the material of the stripes is one or a blend of at least two of polyamide, polyimide, polyacrylonitrile or its copolymer, polypropylene or its copolymer, polyethylene or its copolymer, polyvinyl chloride, polystyrene or its copolymer, saturated polyester, polyurethane, polycarbonate or its copolymer, polyaryletherketone thermoplastic polymer materials, and its mass proportion in the stripes is not less than 80%; As a further description of the above technical solution, the preparation method of the high weather resistance polycarbonate stripe board includes the following steps: Step 1: Prepare stripe materials, polycarbonate layers and acrylic layer materials respectively; Step 2: Melt and co-extrude the polycarbonate layer and the acrylic layer through an extruder to form a multi-layer composite superposed structure board, and at the same time introduce the stripes into the middle of the high impact resistant composite material through the die holes to fuse with the board; Step 3: Cool and shape the fused composite board; As a further description of the above technical solution, the extrusion temperature of the extruder is 200°C - 300°C, and the rotation speed of the screw is 30 - 150 r / min; As a further description of the above technical solution, the stripe introduction speed is 0.1 - 10 mm / s; As a further description of the above technical solution, the cooling and shaping adopts a combination of air cooling and water cooling. The air cooling temperature is 10°C - 50°C, and the water cooling temperature is 20°C - 140°C.

[0007] Compared with the prior art, the beneficial effects of the present invention are: Through the multi-layer structure composite, the excellent weather resistance and light transmittance of the acrylic material are successfully retained, enabling the composite board to maintain good optical performance and color stability during long-term outdoor use, effectively resisting ultraviolet rays and sand erosion. The ultraviolet ray blocking rate can reach 100% (according to ISO 9050 standard). Incorporating a polycarbonate layer endows the composite board with high impact resistance. The drop hammer impact energy is greater than 100J (in accordance with GB / T 14153 standard), and it can reach Class 4 level in the EN1794 - 2 6KJ impact test, and there is no cracking or fragmentation after impact, greatly enhancing the safety and reliability of the board during use, effectively preventing bird strikes and anti-fragment splashing. The polycarbonate layer and reasonable material formula design enable the composite board to have high flame retardancy and high heat resistance. The softening temperature can reach 135℃ - 140℃ (according to GB / T 1633 standard), and the maximum long-term use temperature is 110℃ - 120℃. The fire resistance reaches B1 level (according to GB / T 8624 standard), significantly expanding the application environment range of the board and reducing the fire risk. The unique preparation process ensures the tight combination of each layer of materials, and the reasonable setting of stripes further enhances the structural strength of the board. While ensuring performance, it improves the overall stability and durability of the board, making it have higher application value in the fields of architecture, traffic sound barriers, etc., and meeting diverse engineering needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0009] Figure 1 It is a schematic flow chart of the preparation method of the high weather-resistant polycarbonate stripe board provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0011] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the following will further elaborate on the present application in combination with the drawings and specific implementation manners.

[0012] Refer to the attachedFigure 1 , a highly weather-resistant polycarbonate striped board of this embodiment is made by a composite process, and its structure includes an acrylic layer, a polycarbonate layer and a striped layer. The characteristics of each layer are as follows: Acrylic layer: with a thickness of 300μm - 5000μm, one or several mixtures of polymethyl methacrylate, polybutyl methacrylate, etc. are selected, and 0% - 5% ultraviolet absorber is added. The ultraviolet absorber in the acrylic layer is a benzotriazole-based ultraviolet absorber, and its mass proportion in the acrylic layer material is 0% - 5%.

[0013] Polycarbonate layer: with a thickness of 1mm - 30mm, composed of 90% - 100% bisphenol A polycarbonate, 0% - 2% ultraviolet absorber, 0% - 0.5% antioxidant. The antioxidant in the polycarbonate layer is a hindered phenol antioxidant, and its mass proportion in the polycarbonate layer material is 0% - 0.5%.

[0014] Striped layer: with a diameter of 1mm - 5mm, one or its blends such as polyamide, polyimide, polyacrylonitrile or its copolymer, polypropylene or its copolymer, polyethylene or its copolymer, polyvinyl chloride, polystyrene or its copolymer, saturated polyester, polyurethane, polycarbonate or its copolymer, polyaryletherketone, etc. can be selected. The striped material of the striped layer is polyamide, and its mass proportion in the striped layer is not less than 80%.

[0015] The preparation method of a highly weather-resistant polycarbonate striped board of the present invention is as follows: Step 1: Prepare the materials of the acrylic layer, the polycarbonate layer and the striped layer respectively, and each material is formulated and pretreated according to the above components and ratios.

[0016] Step 2: Use an extruder to melt and co-extrude the materials of the acrylic layer and the polycarbonate layer to form a board with a multi-layer composite superposition structure. During this process, the striped material is accurately introduced into the middle of the high-impact composite material through the die holes and fused with the board.

[0017] Step 3: Cool and shape the composite board to finally obtain the required highly weather-resistant polycarbonate striped board.

[0018] The extrusion temperature of the extruder is 200℃ - 300℃, the rotation speed of the screw is 30 - 150r / min, the traction speed when the striped layer material is introduced is 0.1 - 10mm / s, ensuring that its position accuracy in the board is controlled within ±0.5mm. The cooling and shaping is carried out by a combination of air cooling and water cooling. The air cooling temperature is 10℃ - 50℃, and the water cooling temperature is 30℃ - 140℃. The yellowing index ΔYI of the composite board after 15000h xenon lamp aging test does not exceed 1.0, and it is tested according to the GB / T 16422.2 standard.

[0019] Example 1: The acrylic layer is selected from one or several mixtures of polymethyl methacrylate, polybutyl methacrylate, etc., and 0.05% - 5% of ultraviolet absorber is added to prepare particles. The polycarbonate layer: 90 - 100% of bisphenol A polycarbonate, 0% - 2% of ultraviolet absorber, 0 - 0.5% of antioxidant, 0 - 0.5% of demolding agent, and particles are prepared. The stripe material is made of polyamide with a diameter set to 2 mm.

[0020] Prepare a 15 - mm polycarbonate stripe board: Composition Material Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Surface UV layer Polymethyl methacrylate 100μm 50μm 50μm / PC-based UV layer Acrylic layer Polymethyl methacrylate 500μm 1000μm 1500μm 15mm / Polycarbonate layer Bisphenol A polycarbonate 14mm 13mm 12mm / 15mm Stripe layer Polyamide 2mm 2mm 2mm 2mm 2mm In Examples 2 to 3 of this embodiment, the mixing ratios of different layers are changed, and the manufacturing process steps are the same as those in Example 1.

[0021] The comparison effects are as follows: Serial number Test item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 1 Falling weight impact JGB / T 14153 ＞100J ＞100J ＞100J 30J ＞100J 2 EN1794-2 6KJ impact test grade Class 4 Class 4 Class 4 Class 2 Class 4 3 Whether it cracks or forms fragments under 6KJ impact No No No Yes No 4 UV blocking rate %ISO 9050 100% 100% 100% 60% 100% 5 15000h xenon lamp aging yellowing index ΔYIGB / T 16422.2 0.6 0.3 0.3 3.0 3 6 10000h xenon lamp aging light transmittance decreaseGB / T 16422.2 0.5 0.5 0.3 1.1 1.5 7 Softening temperature ℃GB / T 1633 140 138 135 100 145 8 Highest long-term use temperature ℃ 120 115 110 70 125 9 Fire resistance GB / T 8624 B1 B1 B1 B2 B1 10 Light transmittance %GB / T 2410 91.5 91.5 91.5 91.5 88 Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A highly weather-resistant polycarbonate striated board, characterized in that: A three-layer structure including acrylic, polycarbonate, and stripes embedded inside the polycarbonate. The acrylic has a thickness of 300 μm - 5000 μm and is composed of any one or a mixture of polymethyl methacrylate and polybutyl methacrylate with 0% - 5% of an ultraviolet absorber blended; the polycarbonate has a thickness of 1 mm - 30 mm and consists of 90% - 100% polycarbonate, 0% - 2% ultraviolet absorber, and 0% - 0.5% antioxidant; the stripes are composed of strip polymers with a diameter of 1 mm - 5 mm and are neatly arranged and embedded in the polycarbonate base layer.

2. The high-weather-resistant polycarbonate striated board according to claim 1, characterized in that: The stripes are composed of one or a blend of at least two of polyamide, polyimide, polyacrylonitrile or its copolymer, polypropylene or its copolymer, polyethylene or its copolymer, polyvinyl chloride, polystyrene or its copolymer, saturated polyester, polyurethane, polycarbonate or its copolymer, and polyaryletherketone.

3. The high-weather-resistant polycarbonate striated board according to claim 2, wherein: The ultraviolet absorber in the acrylic is one or a composition of at least two of benzophenone-based, benzotriazole-based, triazine-based, or salicylate ultraviolet absorbers, and its mass proportion in the acrylic material is 0% - 5%.

4. A highly weather-resistant polycarbonate striped board according to claim 3, characterized in that: The antioxidant in the polycarbonate is a hindered phenol antioxidant, and its mass proportion in the polycarbonate material is 0% - 0.5%.

5. The high-weather-resistant polycarbonate striped board according to claim 4, characterized in that: The stripe material is composed of one or a blend of at least two of polyamide, polyimide, polyacrylonitrile or its copolymer, polypropylene or its copolymer, polyethylene or its copolymer, polyvinyl chloride, polystyrene or its copolymer, saturated polyester, polyurethane, polycarbonate or its copolymer, and polyaryletherketone thermoplastic polymer materials, and its mass proportion in the stripe layer is not less than 80%.

6. A method for preparing a highly weather-resistant polycarbonate striped board according to any one of claims 1-5, characterized in that, Including the following steps: Step 1: Prepare stripe material, polycarbonate layer, and acrylic layer material respectively; Step 2: Melt and co-extrude the polycarbonate layer and acrylic layer through an extruder to form a multi-layer composite superposed structure plate, and at the same time introduce the stripe material through the die hole into the middle of the high impact-resistant composite material to fuse with the plate; Step 3: Cool and shape the fused composite plate.

7. The preparation method according to claim 6, characterized in that, The extrusion temperature of the extruder is 200°C - 300°C, and the rotation speed of the screw is 30 - 150 r / min.

8. A highly weather-resistant polycarbonate striped board and a preparation method thereof according to claim 6, characterized in that: The introduction speed of the stripe material is 0.1 - 10 mm / s.

9. The preparation method according to claim 6, characterized in that, The cooling and shaping is carried out by a combination of air cooling and water cooling. The air cooling temperature is 10°C - 50°C, and the water cooling temperature is 20°C - 140°C.

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