Impact-resistant PP plate

Abstract

The utility model relates to the technical field of plate materials, and discloses an impact-resistant PP plate which comprises a PP plate body, honeycomb-shaped holes are formed in the inner wall of the top of the PP plate body, a honeycomb-shaped or grid-shaped cavity structure is formed in the plate, the cavity structure absorbs energy through deformation, meanwhile, structural mechanics is used for dispersing impact force, and therefore the impact resistance of the PP plate is improved. The PP board comprises a PP board body, local stress concentration is reduced, the impact resistance is remarkably improved while the board is lightened, the outer walls of the top side and the bottom side of the PP board body are connected with fusion agent layers in an attached mode, the outer walls of the sides, away from the PP board body, of the fusion agent layers are connected with surface layer boards in an attached mode, and the inner wall of the side face of the PP board body is filled with a toughening layer. According to the utility model, the honeycomb-shaped or grid-shaped cavity structure is arranged in the plate, so that the impact force is effectively dispersed, the energy is absorbed through structural deformation, the impact resistance of the PP plate is obviously improved, the weight of the plate is reduced, and the balance of light weight and high strength is realized.

Description

Technical Field

[0001] This utility model relates to the field of sheet material technology, and in particular to an impact-resistant PP sheet. Background Technology

[0002] PP sheets are thermoplastic sheets made of polypropylene resin through extrusion molding. Polypropylene is a semi-crystalline polymer with characteristics such as low density, strong chemical corrosion resistance, and easy processing. Therefore, PP sheets are widely used in many fields such as chemical, food, packaging, construction, and automobile.

[0003] PP sheets are thermoplastic sheets made from polypropylene resin through extrusion and other processes. They have a low density of 0.9-0.91 g / cm³, combining lightweight with good rigidity. They can withstand long-term use at temperatures up to 100-120℃, exhibiting strong resistance to acids, alkalis, and other chemical media. Furthermore, they are non-toxic, environmentally friendly, and meet food contact standards. Easy to mold and process, they can be welded together and are widely used in chemical corrosion protection, food packaging, and construction formwork, making them an indispensable plastic material in both industrial and daily life.

[0004] PP sheets have the following defects: PP molecular chains have a linear structure and the methyl side chains are regularly arranged, resulting in weak intermolecular forces. The material has high overall rigidity but insufficient toughness. Under external impact, the molecular chains are unable to absorb energy through slippage or deformation, making them prone to brittle fracture. Therefore, an impact-resistant PP sheet is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an impact-resistant PP sheet, which aims to improve the problem in the prior art where the molecular chain is linear and the methyl side chain is regularly arranged, the intermolecular forces are weak, the overall rigidity of the material is high but the toughness is insufficient, and the molecular chain is difficult to absorb energy through slippage or deformation under external impact.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an impact-resistant PP sheet, comprising a PP sheet body, wherein the top inner wall of the PP sheet body is provided with honeycomb-shaped holes, forming a honeycomb or grid-shaped cavity structure inside the sheet. The cavity structure absorbs energy through deformation and disperses impact force using structural mechanics, reducing local stress concentration, thereby making the sheet lightweight while significantly improving its impact resistance. A fusion layer is attached to the top and bottom outer walls of the PP sheet body, and a surface plate is attached to the outer wall of the fusion layer on the side away from the PP sheet body. A toughening layer is filled to the inner wall of the side of the PP sheet body, and a reinforcing layer is filled to the inner wall of the side of the surface plate.

[0007] As a further description of the above technical solution: There are two surface plates, which are respectively attached to the top and bottom outer walls of the PP sheet body through a fusion layer. The bonding between the sheets improves the compatibility of the two-phase interface, enhances the bonding force between different materials, and enables the impact energy to be effectively transferred in the system, thereby improving the overall impact resistance.

[0008] As a further description of the above technical solution: there are several honeycomb holes, and the several honeycomb holes are respectively opened on the inner side walls of the surface plate and the PP board body.

[0009] As a further description of the above technical solution: the toughening layer is filled into the mixed phase of the PP sheet body material, and the proportion of the toughening layer filling the PP sheet body material is 15%. The toughening layer material is a blend of ethylene propylene rubber, thermoplastic elastomer and PP sheet body material. The elastomer forms a dispersed phase in the PP matrix. When the sheet is impacted, the elastomer particles act as stress concentration points, absorbing impact energy and inhibiting crack propagation, which can increase the notched impact strength of the PP sheet by more than one time.

[0010] As a further description of the above technical solution: the material of the reinforcing layer filling the surface plate is internally mixed and adapted, the material ratio of the reinforcing layer filling the surface plate is 5%, and the material of the reinforcing layer is nano-calcium carbonate nano-scale filler, which can significantly improve the toughness of PP sheet. The nano-filler is uniformly dispersed in the PP matrix, which can induce plastic deformation of the matrix and absorb impact energy.

[0011] As a further description of the above technical solution: the fusion layer also includes a polar polymer layer and a maleic anhydride-grafted PP material layer. The thickness of the fusion layer is four millimeters. When the polar polymer and maleic anhydride-grafted PP are blended, the interfacial compatibility between the two phases can be improved, phase separation can be reduced, the impact energy transfer efficiency can be enhanced, the overall toughness between materials can be improved, and performance degradation caused by poor compatibility can be avoided.

[0012] The present invention has the following beneficial effects: 1. In the present invention, by setting a honeycomb or grid-like cavity structure inside the board, the impact force is effectively dispersed and the energy is absorbed through structural deformation, which significantly improves the impact resistance of the PP board and reduces the weight of the board, achieving a balance between lightweight and high strength, and is suitable for application scenarios with high requirements for weight and impact resistance.

[0013] 2. In this utility model, by using a fusion agent layer to enhance the bonding force between different material layers, and by combining the absorption effect of impact energy by the elastomer particles in the toughening layer, crack propagation is effectively suppressed, the overall impact resistance and interface stability of the PP sheet are greatly improved, performance degradation caused by interlayer delamination or stress concentration is avoided, and the service life of the sheet is extended. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall front view of an impact-resistant PP sheet proposed in this utility model.

[0015] Figure 2 This is a side view of an impact-resistant PP sheet proposed in this utility model.

[0016] Figure 3 This is a cross-sectional schematic diagram of an impact-resistant PP sheet proposed in this utility model.

[0017] Illustration: 1. Main body of PP sheet; 2. Honeycomb pores; 3. Fusion layer; 4. Surface sheet; 5. Toughening layer; 6. Reinforcing layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-3 One embodiment of this utility model provides: an impact-resistant PP sheet, including a PP sheet body 1, with honeycomb-shaped holes 2 formed on the top inner wall of the PP sheet body 1, forming a honeycomb or grid-shaped cavity structure inside the sheet. The cavity structure absorbs energy through deformation and disperses impact force using structural mechanics, reducing local stress concentration, making the sheet lightweight while significantly improving its impact resistance. A fusion layer 3 is attached to the top and bottom outer walls of the PP sheet body 1, and a surface plate 4 is attached to the outer wall of the fusion layer 3 on the side away from the PP sheet body 1. A toughening layer 5 is filled on the inner wall of the side of the PP sheet body 1, and a reinforcing layer 6 is filled on the inner wall of the side of the surface plate 4.

[0020] Reference Figures 1-3There are several honeycomb-shaped holes 2, which are respectively opened on the inner side walls of the surface plate 4 and the PP sheet body 1. The toughening layer 5 is filled into the PP sheet body 1 with a material ratio of 15%. The material of the toughening layer 5 is a blend of ethylene propylene rubber, thermoplastic elastomer and PP sheet body 1. The elastomer forms a dispersed phase in the PP matrix. When the sheet is impacted, the elastomer particles act as stress concentration points, absorb impact energy, and inhibit crack propagation. This can increase the notched impact strength of the PP sheet body 1 by more than 2 times. The reinforcing layer 6 is filled into the surface plate 4 with a material ratio of 5%. The material of the reinforcing layer 6 is nano-calcium carbonate nano-filler, which can significantly improve the toughness of the PP sheet. The nano-filler is uniformly dispersed in the PP matrix, which can induce plastic deformation of the matrix and absorb impact energy. The internal mixed phase of the material of the toughening layer 5 filled into the PP sheet body 1 is compatible. The internal mixed phase of the material of the reinforcing layer 6 filled into the surface plate 4 is compatible.

[0021] Reference Figures 1-3 There are two surface plates 4. The two surface plates 4 are respectively attached to the outer walls of the top and bottom sides of the PP sheet body 1 through the fusion layer 3. The bonding between the sheets improves the compatibility of the two-phase interface, enhances the bonding force between different materials, and enables the impact energy to be effectively transferred in the system, thereby improving the overall impact resistance. The fusion layer 3 also includes a polar polymer layer and a maleic anhydride-grafted PP material layer. The thickness of the fusion layer 3 is four millimeters. When the polar polymer and maleic anhydride-grafted PP are blended, the compatibility of the two-phase interface can be improved, phase separation can be reduced, the impact energy transfer efficiency can be enhanced, the overall toughness between materials can be improved, and performance degradation caused by poor compatibility can be avoided.

[0022] Working principle: A honeycomb or grid-like cavity structure is formed inside the board. The cavity structure absorbs energy through deformation and disperses impact force using structural mechanics, reducing local stress concentration. This makes the board lightweight while significantly improving its impact resistance. The fusion agent layer 3 improves the compatibility of the two-phase interface by bonding the boards together and enhances the bonding force between different materials, allowing impact energy to be effectively transferred in the system, thereby improving the overall impact resistance. Furthermore, the toughening layer 5 acts as a stress concentration point when the board is impacted, absorbing impact energy and inhibiting crack propagation. This can increase the notched impact strength of the PP board by more than 2 times.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An impact-resistant PP sheet, comprising a PP sheet body (1), characterized in that: The top inner wall of the PP sheet body (1) is provided with honeycomb holes (2), the top and bottom outer walls of the PP sheet body (1) are bonded with a fusion layer (3), the outer wall of the fusion layer (3) away from the PP sheet body (1) is bonded with a surface plate (4), the inner wall of the side of the PP sheet body (1) is filled with a toughening layer (5), and the inner wall of the side of the surface plate (4) is filled with a reinforcing layer (6).

2. The impact-resistant PP sheet according to claim 1, characterized in that: There are two surface panels (4), and the two surface panels (4) are respectively attached to the top and bottom outer walls of the PP sheet body (1) through a fusion layer (3).

3. The impact-resistant PP sheet according to claim 1, characterized in that: There are several honeycomb holes (2), and several honeycomb holes (2) are respectively opened on the inner side wall of the surface plate (4) and the PP sheet body (1).

4. The impact-resistant PP sheet according to claim 1, characterized in that: The toughening layer (5) is filled into the material interior of the PP sheet body (1).

5. The impact-resistant PP sheet according to claim 1, characterized in that: The reinforcing layer (6) is filled into the material of the surface plate (4) and mixed.

6. The impact-resistant PP sheet according to claim 1, characterized in that: The fusion layer (3) also includes a polar polymer layer and a maleic anhydride-grafted PP material layer.

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