High-temperature-resistant polypropylene film

Abstract

The utility model discloses a high-temperature-resistant polypropylene film, which comprises a polypropylene base film layer, an elastic layer, a heat-proof layer and a waterproof breathable layer, a plurality of inclined first grooves are respectively arranged on the upper surface and the lower surface of the elastic layer, and an inclined second groove is arranged between two adjacent first grooves on the upper side of the elastic layer. Longitudinal heat dissipation holes are formed in the elastic layer, the upper surfaces and the lower surfaces of the longitudinal heat dissipation holes penetrate through the first groove and the second groove, a plurality of vent holes are formed in the heat protection layer, the direction of the vent holes is consistent with the path direction of the first groove, and vent holes communicated with the longitudinal heat dissipation holes are formed in the polypropylene base film layer. After the technical scheme is adopted, according to the high-temperature-resistant polypropylene film provided by the utility model, the heat dissipation performance of the elastic layer can be enhanced through the arrangement of the first grooves in the elastic layer, and air circulation in the film is enhanced under the action of the longitudinal heat dissipation holes, the vent holes and the vent holes, so that the heat dissipation performance of the film is improved. The heat dissipation performance of the prepared high-temperature-resistant polypropylene film is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of film technology, and in particular to a high-temperature resistant polypropylene film. Background Technology

[0002] Polypropylene is a thermoplastic resin produced by polymerizing propylene. It is a non-toxic, odorless, and tasteless milky-white, highly crystalline polymer widely used in food, pharmaceutical, and chemical industries, with food packaging accounting for the largest proportion, such as beverage packaging, retortable food packaging, and fast food packaging.

[0003] However, the existing polypropylene film has a relatively simple structure and poor high-temperature resistance. Prolonged use will reduce the service life of the polypropylene film, making it inconvenient for users and reducing its practicality. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature resistant polypropylene film to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-temperature resistant polypropylene film, comprising a polypropylene base film layer, and further comprising an elastic layer, a heat-insulating layer, and a waterproof and breathable layer sequentially disposed above the polypropylene base film layer. The elastic layer has several oblique first grooves on its upper and lower surfaces, and an oblique second groove is disposed between two adjacent first grooves on the upper side of the elastic layer. The elastic layer has longitudinal heat dissipation holes, the upper and lower surfaces of which both penetrate the first and second grooves. The heat-insulating layer has several vent holes, the orientation of which is consistent with the path direction of the first grooves. The polypropylene base film layer has ventilation holes communicating with the longitudinal heat dissipation holes.

[0006] Preferably, the vent holes are staggered from the longitudinal heat dissipation holes.

[0007] Preferably, the width of the second groove is greater than the width of the first groove, and the depth of the first groove is the same as the depth of the second groove.

[0008] Preferably, a flame-retardant sheet is adhered to the second groove; when the flame-retardant sheet is adhered to the second groove, the upper surface of the flame-retardant sheet is flush with the upper surface of the elastic layer.

[0009] Preferably, the flame retardant sheet is made of polyvinyl chloride material.

[0010] Preferably, the heat-resistant layer consists of a heat-resistant layer and a heat-insulating layer disposed below the heat-resistant layer, the upper surface of the heat-resistant layer is connected to the waterproof and breathable layer, and the lower surface of the heat-resistant layer is connected to the elastic layer.

[0011] Preferably, the heat-resistant layer is made of polytetrafluoroethylene, and the heat-insulating layer is made of metallocene polyethylene.

[0012] Preferably, the waterproof and breathable layer is a PTFE film.

[0013] Preferably, the elastic layer is made of thermoplastic polyurethane material.

[0014] Preferably, the thickness of the elastic layer is greater than the thickness of the polypropylene base film layer and the heat-insulating layer.

[0015] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0016] 1. The high-temperature resistant polypropylene film provided by this utility model can enhance the heat dissipation performance of the elastic layer by setting the first groove on the elastic layer, and enhance the air circulation inside the film under the action of longitudinal heat dissipation holes, vent holes and ventilation holes, thus greatly improving the heat dissipation performance of the high-temperature resistant polypropylene film.

[0017] 2. The high-temperature resistant polypropylene film provided by this utility model, through the setting of the heat-proof layer, and with the cooperation of the heat-resistant layer and the heat insulation layer, enables the heat-proof layer to have dual high-temperature protection, thereby greatly improving the high-temperature resistance performance of the obtained high-temperature resistant polypropylene film and extending its service life.

[0018] 3. The high-temperature resistant polypropylene film provided by this utility model can effectively increase the elasticity and extensibility of the film by setting an elastic layer; and the flame retardant sheet can improve the flame retardant performance of the obtained high-temperature resistant polypropylene film to a certain extent. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is an exploded view of a high-temperature resistant polypropylene film according to this utility model.

[0021] Figure 2 This is a front view of a high-temperature resistant polypropylene film according to this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the elastic layer of a high-temperature resistant polypropylene film according to the present invention;

[0023] Figure 4 for Figure 3 Top view;

[0024] Figure 5 This is a diagram showing the internal structure of the heat-resistant layer of a high-temperature resistant polypropylene film according to this utility model. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Example

[0030] like Figures 1 to 5As shown, a high-temperature resistant polypropylene film includes a polypropylene base film layer 1, and an elastic layer 2, a heat-insulating layer 3, and a waterproof and breathable layer 4 sequentially disposed above the polypropylene base film layer 1. The elastic layer 2 is formed by pressing the upper and lower surfaces along its thickness direction to form an oblique first groove 21. An oblique second groove 22 is formed between two adjacent first grooves 21 on the upper side of the elastic layer 2 by pressing the upper surfaces together. A longitudinal heat dissipation hole 23 is formed on the elastic layer 2 by a laser drilling machine. The upper and lower surfaces of the longitudinal heat dissipation hole 23 both pass through the first groove 21 and the second groove 22. A plurality of ventilation holes 3a are formed on the heat-insulating layer 3 by a laser drilling machine. The orientation of the ventilation holes 3a is consistent with the path direction of the first groove 21. A ventilation hole 1a communicating with the longitudinal heat dissipation hole 23 is formed on the polypropylene base film layer 1 by a laser drilling machine. The ventilation hole 3a is staggered from the longitudinal heat dissipation hole 23. The thickness of the elastic layer 2 is greater than the thickness of the polypropylene base film layer 1 and the heat-insulating layer 3. By adopting this structure, the first groove 21 and the second groove 22, which are arranged obliquely upwards, can increase the contact area between the elastic layer 2 and the air, which is more conducive to heat dissipation and greatly improves the heat dissipation effect. Furthermore, under the action of the longitudinal heat dissipation hole 23, the vent hole 3a and the ventilation hole 1a, the air circulation inside the film is enhanced, which greatly improves the heat dissipation of the high temperature resistant polypropylene film.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the width of the second groove 22 is greater than the width of the first groove 21, and the depth of the first groove 21 is the same as the depth of the second groove 22. This structure facilitates the machining of the first groove 21 and the second groove 22.

[0032] like Figure 1 and Figure 2 As shown, a flame-retardant sheet 22a is adhered to the second groove 22; after the flame-retardant sheet 22a is adhered to the second groove 22, the upper surface of the flame-retardant sheet 22a is flush with the upper surface of the elastic layer 2. This structure facilitates the installation of the flame-retardant sheet 22a.

[0033] In this embodiment, the flame-retardant sheet 22a is made of polyvinyl chloride. This structure is used to improve the flame-retardant properties of the resulting high-temperature resistant polypropylene film.

[0034] like Figure 5As shown, the heat-resistant layer 3 consists of a heat-resistant layer 31 and a heat-insulating layer 32 located below the heat-resistant layer 31. The upper surface of the heat-resistant layer 31 is connected to the waterproof and breathable layer 4, and the lower surface of the heat-resistant layer 31 is connected to the elastic layer 2. The heat-resistant layer 31 is made of polytetrafluoroethylene, and the heat-insulating layer 32 is made of metallocene polyethylene. With this structure, the heat-resistant layer 3, in conjunction with the heat-resistant layer 31 and the heat-insulating layer 32, provides dual high-temperature protection, thereby greatly improving the high-temperature resistance of the resulting high-temperature resistant polypropylene film and extending its service life.

[0035] In this embodiment, the waterproof and breathable layer 4 is a PTFE film, which is made of polytetrafluoroethylene dispersion resin through premixing, extrusion, calendering, and biaxial stretching. With this structure, the PTFE film is densely covered with micropores. In the gaseous state, air molecules (including gaseous water molecules) are very small and, according to the principle of capillary motion, can easily permeate to the other side of the PTFE film, thus causing breathability. When gaseous water condenses into liquid water mist or droplets, the water particles become larger and cannot pass through the micropores of the PTFE film. Due to the surface tension of the water mist or droplets (the mutual "pulling and resistance" between water molecules), the water molecules cannot easily detach from the water droplets or mist and permeate to the other side, thus preventing water penetration and providing waterproofing. Therefore, the PTFE film has waterproof and breathable properties; the high-temperature resistant polypropylene film made using PTFE film has excellent waterproof and breathable properties.

[0036] In this embodiment, the elastic layer 2 is made of thermoplastic polyurethane. Using this structure, the elastic layer 2 effectively increases the elasticity and ductility of the film.

[0037] In this embodiment, the waterproof and breathable layer 4, the heat-resistant layer 31, the heat-insulating layer 32, the elastic layer 2, and the polypropylene base film layer 1 are all seamlessly bonded together in pairs using nano-organic silicone. This structure ensures the strong bond between the layers.

[0038] Working principle: First, an elastic layer 2 is seamlessly bonded to the upper surface of the polypropylene base film layer 1 using nano-organic silicone. Then, a flame-retardant sheet 22a is attached to the second groove 22 of the elastic layer 2. Next, a heat insulation layer 32 is seamlessly bonded to the upper surface of the elastic layer 2 using nano-organic silicone. Immediately afterward, a heating layer is seamlessly bonded to the upper surface of the heat insulation layer 32 using nano-organic silicone. Finally, a waterproof and breathable layer 4 is seamlessly bonded to the upper surface of the heating layer using nano-organic silicone. This completes the entire process of using the high-temperature resistant polypropylene film.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. A high-temperature resistant polypropylene film, comprising a polypropylene base film layer, characterized in that: It also includes an elastic layer, a heat-insulating layer, and a waterproof and breathable layer sequentially disposed above the polypropylene base film layer. The elastic layer has several oblique first grooves on its upper and lower surfaces, and an oblique second groove is disposed between two adjacent first grooves on the upper side of the elastic layer. The elastic layer has longitudinal heat dissipation holes, and the upper and lower surfaces of the longitudinal heat dissipation holes both pass through the first and second grooves. The heat-insulating layer has several vent holes, and the orientation of the vent holes is consistent with the path direction of the first grooves. The polypropylene base film layer has ventilation holes that communicate with the longitudinal heat dissipation holes.

2. The high-temperature resistant polypropylene film according to claim 1, characterized in that: The ventilation holes are staggered from the longitudinal heat dissipation holes.

3. The high-temperature resistant polypropylene film according to claim 1, characterized in that: The width of the second groove is greater than the width of the first groove, and the depth of the first groove is the same as the depth of the second groove.

4. The high-temperature resistant polypropylene film according to claim 1, characterized in that: A flame-retardant sheet is adhered to the second groove; when the flame-retardant sheet is adhered to the second groove, the upper surface of the flame-retardant sheet is flush with the upper surface of the elastic layer.

5. The high-temperature resistant polypropylene film according to claim 4, characterized in that: The flame-retardant sheet is made of polyvinyl chloride.

6. The high-temperature resistant polypropylene film according to claim 1, characterized in that: The heat-resistant layer consists of a heat-resistant layer and a heat-insulating layer located below the heat-resistant layer. The upper surface of the heat-resistant layer is connected to the waterproof and breathable layer, and the lower surface of the heat-resistant layer is connected to the elastic layer.

7. The high-temperature resistant polypropylene film according to claim 6, characterized in that: The heat-resistant layer is made of polytetrafluoroethylene, and the heat-insulating layer is made of metallocene polyethylene.

8. The high-temperature resistant polypropylene film according to claim 1, characterized in that: The waterproof and breathable layer is a PTFE film.

9. A high-temperature resistant polypropylene film according to claim 1, characterized in that: The elastic layer is made of thermoplastic polyurethane material.

10. A high-temperature resistant polypropylene film according to claim 1, characterized in that: The thickness of the elastic layer is greater than the thickness of the polypropylene base film layer and the heat-insulating layer.

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