High-flexibility film and preparation method thereof

Abstract

The invention belongs to the technical field of thin film production, and particularly relates to a high-flexibility thin film and a preparation method thereof.The high-flexibility thin film comprises a thin film body, a flexible layer arranged in the thin film body, an electroplated layer arranged in the thin film body, a breathable layer arranged in the thin film body, and a connecting layer arranged in the thin film body; a waterproof layer is arranged on the bottom face of the connecting layer, the connecting layer is made of maleic anhydride modified polyolefin materials, the flexible layer is made of PP elastomer mixed materials, the electroplated layer is an aluminum plating layer, the thickness of the electroplated layer is one micrometer, and the breathable layer is made of high polymer materials. The flexible layer is made of PP elastomer mixed substances, transparency and flexibility of the thin film can be improved, durability of the thin film is improved, the electroplated layer is an aluminum coating, corrosion resistance of the thin film is effectively enhanced, the thin film has the capacity of blocking water vapor and carbon dioxide, and breathability of the thin film can be improved through the breathable layer.

Description

Technical Field

[0001] The invention relates to the technical field of film production, in particular to a high-flexibility film and a preparation method thereof. Background Art

[0002] Film is a thin, soft, transparent sheet made of plastic, adhesive, rubber or other materials. The scientific explanation of film is: a two-dimensional material formed by the deposition of atoms, molecules or ions on the surface of a substrate, such as optical film, composite film, superconducting film, polyester film, nylon film, plastic film, etc. Films are widely used in electronics, machinery, printing and other industries. Film materials refer to thin metal or organic layers with a thickness ranging from a single atom to several millimeters. Electronic semiconductor functional devices and optical coatings are the main applications of thin film technology.

[0003] Flexible displays and circuit boards in electronic products require highly flexible and durable films, flexible sensors and dressings in medical devices require a combination of breathability and waterproofness, and packaging materials need to take into account both transparency and mechanical properties. Existing film materials have certain limitations in flexibility, durability, breathability and waterproofness, and it is difficult to meet the needs of various fields for high-performance film materials. Therefore, the development of a highly flexible film material is of great practical significance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a highly flexible film and a method for preparing the same, which solves the problem that the existing film materials have certain limitations in flexibility, durability, air permeability and waterproofness, and are difficult to meet the demand for high-performance film materials in various fields.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a highly flexible film, comprising a film body, a flexible layer is provided inside the film body, an electroplating layer is provided inside the film body, a breathable layer is provided inside the film body, a connecting layer is provided inside the film body, and a waterproof layer is provided on the bottom surface of the connecting layer.

[0006] As a preferred technical solution of the present invention, the connecting layer is made of maleic anhydride modified polyolefin material, and the flexible layer is made of PP elastomer mixed material.

[0007] As a preferred technical solution of the present invention, the electroplating layer is an aluminum plating layer, and the thickness of the electroplating layer is one micron.

[0008] As a preferred technical solution of the present invention, the air permeable layer is made of polymer material, and the waterproof layer is made of polyethylene resin material.

[0009] As a preferred technical solution of the present invention, the step one is: preparing resin raw materials; the step two is setting the raw material process temperature; the step three is setting the equipment process; and the step four is running the equipment.

[0010] As a preferred technical solution of the present invention, the TIE used in the preparation of the resin raw material is a modified adhesive resin, the PE used is a mixture of PE resin and PE elastomer, the PP used is a mixture of PP resin and PP elastomer, and EVOH is ethylene-vinyl alcohol copolymer.

[0011] As a preferred technical solution of the present invention, the layer thickness of the modified adhesive resin accounts for 41%, the layer thickness of the mixture of PE resin and PE elastomer accounts for 5%, the layer thickness of the mixture of PP resin and PP elastomer accounts for 8%, the layer thickness of ethylene accounts for 5%, and the layer thickness of vinyl alcohol copolymer accounts for 41%.

[0012] As a preferred technical solution of the present invention, in the raw material process temperature setting, the temperature of the PP resin is 180-230°C, the temperature of the modified adhesive resin is 200-220°C, and the temperature of the ethylene-vinyl alcohol copolymer is 200-220°C.

[0013] As a preferred technical solution of the present invention, the equipment process sets the temperature of the cold roller to 30°C, the fixed edge voltage to 15KV, and the air knife pressure to 5 bar.

[0014] As a preferred technical solution of the present invention, the equipment is operated, the extruder screw is started, the screw speed is initially set to 7rpm, a traction rope is used to pull the film from the cold roller position to the winding device, the online thickness gauge is started, the winding device is started, and the modified adhesive resin is used as the main raw material to form a sheet by extrusion, and then stretched to form a film material due to its high rigidity, hardness, excellent mechanical properties and chemical properties and dimensional stability.

[0015] Compared with the prior art, the present invention provides a high-flexibility film and a preparation method thereof, which has the following beneficial effects: The high-flexibility film and preparation method thereof can make the connection of the film more stable through the connecting layer, increase the overall strength of the film, use the flexible layer to be made of a PP elastomer mixed material, increase the transparency and flexibility of the film, and increase the durability of the film, use the electroplating layer as an aluminum plating layer, effectively enhance the corrosion resistance of the film, and enable the film to have the ability to block water vapor and carbon dioxide, use the breathable layer to increase the air permeability of the film, and use the waterproof layer to be made of a polyethylene resin material to increase the waterproof performance of the film. The film is made of a modified adhesive resin as the main raw material by an extrusion method to form a sheet, and then stretched to form a film material. Due to its high rigidity, hardness, excellent mechanical and chemical properties and dimensional stability, it can be widely used in food and pharmaceutical chemical packaging, decoration, electronics, electrical insulation, screen protection and other fields, and solves the problems of flexibility, durability, breathability and waterproofness existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the high-flexibility film of the present invention; Figure 2 The figure is a flow chart for preparing the highly flexible film of the present invention.

[0017] In the figure: 1. Film body; 2. Flexible layer; 3. Electroplating layer; 4. Breathable layer; 5. Connecting layer; 6. Waterproof layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example See also Figure 1-2 In this embodiment: a highly flexible film includes a film body 1, a flexible layer 2 is provided inside the film body 1, a plating layer 3 is provided inside the film body 1, a breathable layer 4 is provided inside the film body 1, a connecting layer 5 is provided inside the film body 1, and a waterproof layer 6 is provided on the bottom surface of the connecting layer 5.

[0020] In this embodiment, the connecting layer 5 is made of maleic anhydride modified polyolefin material, the flexible layer 2 is made of PP elastomer mixed material, the electroplating layer 3 is an aluminum plating layer, the thickness of the electroplating layer 3 is one micron, the breathable layer 4 is made of polymer material, and the waterproof layer 6 is made of polyethylene resin material. The connecting layer 5 can make the connection of the film more stable and increase the overall strength of the film. The flexible layer 2 is made of PP elastomer mixed material, which can increase the transparency and flexibility of the film and increase the durability of the film. The electroplating layer 3 is an aluminum plating layer, which effectively enhances the corrosion resistance of the film and enables the film to have the ability to block water vapor and carbon dioxide. The breathable layer 4 can increase the air permeability of the film. The waterproof layer 6 is made of polyethylene resin material to increase the waterproof performance of the film.

[0021] In this embodiment, step one: resin raw material preparation; step two: raw material process temperature setting; step three: equipment process setting; step four: equipment operation, the TIE used in the resin raw material preparation is a modified adhesive resin, the PE used is a mixture of PE resin and PE elastomer, the PP used is a mixture of PP resin and PP elastomer, EVOH is ethylene-vinyl alcohol copolymer, the layer thickness of the modified adhesive resin accounts for 41%, the layer thickness of the PE resin and the PE elastomer mixture accounts for 5%, the layer thickness of the PP resin and the PP elastomer mixture accounts for 8%, the layer thickness of ethylene accounts for 5%, the layer thickness of the vinyl alcohol copolymer accounts for 41%, and the raw material process temperature In the temperature setting, the temperature of PP resin is 180-230℃, the temperature of modified adhesive resin is 200-220℃, the temperature of ethylene-vinyl alcohol copolymer is 200-220℃, the temperature of cold roller is 30℃, the fixed edge voltage is 15KV, the air knife pressure is 5bar, the equipment is running, the extruder screw is started, the screw speed is set to 7rpm, the traction rope is used to pull the film from the cold roller position to the winding device, the online thickness gauge is started, and the winding device is started. The modified adhesive resin is used as the main raw material to form a sheet by extrusion, and then it is stretched to form a film material due to its high rigidity, hardness and excellent mechanical and chemical properties and dimensional stability.

[0022] The working principle and use process of the present invention are as follows: firstly, the corresponding materials are selected, and then the resin raw materials are prepared. The TIE used is a modified adhesive resin, the PE used is a mixture of PE resin and PE elastomer, the PP used is a mixture of PP resin and PP elastomer, EVOH is an ethylene-vinyl alcohol copolymer, the layer thickness of the modified adhesive resin accounts for 41%, the layer thickness of the PE resin and the PE elastomer mixture accounts for 5%, the layer thickness of the PP resin and the PP elastomer mixture accounts for 8%, the layer thickness of ethylene accounts for 5%, and the layer thickness of the vinyl alcohol copolymer accounts for 41%. Then, the temperature of the raw material process is set, the temperature of the PP resin is 180-230°C, the modified adhesive resin The temperature is 200-220℃, the temperature of ethylene-vinyl alcohol copolymer is 200-220℃, then the temperature of the cold roller of the equipment is 30℃, the fixed edge voltage is 15KV, the air knife pressure is 5bar, and then the auxiliary materials are added, flame retardant 1-5%, toughening agent 0.5-2%, antioxidant 0.1-0.5%, lubricant 0.5-1%, nucleating agent 0.1-0.5%, the intrinsic viscosity of the modified adhesive resin is 0.68dl / g, the flame retardant includes at least one of brominated epoxy resin, decabromodiphenylethane, and brominated polystyrene, the toughening agent includes toughening resin 98.5-99.5% and photoinitiator 0.5-1.5%, and the toughening agent includes toughening resin 99% and photoinitiator 1%; Then operate the equipment, start the extruder screw, set the screw speed to 7rpm, use the traction rope to pull the film from the cold roller position to the winding device, start the online thickness gauge to measure the thickness of the film, and then start the winding device to wind the film. The film is made of modified adhesive resin as the main raw material by extrusion to form a sheet, and then stretched to form a film material. Due to its high rigidity, hardness, excellent mechanical properties and chemical properties, as well as dimensional stability, it can be widely used in food and pharmaceutical chemical packaging, decoration, electronics, electrical insulation, screen protection and other fields.

[0023] In the description of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. It should be noted that, in this article, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A highly flexible film, comprising a film body (1), characterized in that: A flexible layer (2) is provided inside the film body (1), an electroplated layer (3) is provided inside the film body (1), a breathable layer (4) is provided inside the film body (1), a connecting layer (5) is provided inside the film body (1), and a waterproof layer (6) is provided on the bottom surface of the connecting layer (5).

2. A highly flexible film according to claim 1, characterized in that: The connecting layer (5) is made of maleic anhydride modified polyolefin material, and the flexible layer (2) is made of PP elastomer mixed material.

3. A highly flexible film according to claim 1, characterized in that: The electroplated layer (3) is an aluminum plated layer, and the thickness of the electroplated layer (3) is one micrometer.

4. The highly flexible film according to claim 1, characterized in that: The air permeable layer (4) is made of a polymer material, and the waterproof layer (6) is made of a polyethylene resin material.

5. The method for preparing a highly flexible film according to claim 1, characterized in that: The step 1: preparing resin raw materials; Step 2: Raw material process temperature setting; Step 3: Equipment process setting; Step 4: Equipment operation.

6. A method for preparing a highly flexible film according to claim 5, characterized in that: The TIE used in the preparation of the resin raw materials is a modified adhesive resin, the PE used is a mixture of PE resin and PE elastomer, the PP used is a mixture of PP resin and PP elastomer, and EVOH is an ethylene-vinyl alcohol copolymer.

7. The method for preparing a highly flexible film according to claim 5, characterized in that: The layer thickness of the modified adhesive resin accounts for 41%, the layer thickness of the mixture of PE resin and PE elastomer accounts for 5%, the layer thickness of the mixture of PP resin and PP elastomer accounts for 8%, the layer thickness of ethylene accounts for 5%, and the layer thickness of vinyl alcohol copolymer accounts for 41%.

8. The method for preparing a highly flexible film according to claim 5, characterized in that: In the raw material process temperature setting, the temperature of the PP resin is 180-230°C, the temperature of the modified adhesive resin is 200-220°C, and the temperature of the ethylene-vinyl alcohol copolymer is 200-220°C.

9. The method for preparing a highly flexible film according to claim 5, characterized in that: The equipment process sets the temperature of the cold roller to 30°C, the fixed edge voltage to 15KV, and the air knife pressure to 5 bar.

10. The method for preparing a highly flexible film according to claim 5, characterized in that: The equipment is in operation, the extruder screw is started, the screw speed is initially set to 7rpm, a traction rope is used to pull the film from the cold roller position to the winding device, the online thickness gauge is started, the winding device is started, and a sheet is made by extrusion using modified adhesive resin as the main raw material, and then stretched to form a film material due to its high rigidity, hardness, excellent mechanical properties and chemical properties effects and dimensional stability.

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