Polypropylene smoke film with high tensile strength

Abstract

The utility model relates to the field of packaging materials, and discloses a polypropylene cigarette film with high tensile strength, which comprises a central layer, the central layer is used as the center of the cigarette film, a degradation layer is arranged on the surface of the central layer, degradation holes are formed in the surface of the central layer, a flame-retardant layer, an upper surface layer and a lower surface layer are compounded on the outermost side of the degradation layer, the upper surface layer and the lower surface layer are both used as the outermost side of the smoke film in a protective mode, the upper surface layer is attached to the upper side of the center layer, and the lower surface layer is attached to the lower side of the center layer. The packaging film has good biodegradability, high transparency and easy processing performance, can be used as a packaging material in the fields of food, electronic products, books and the like, has positive significance on packaging weight reduction, environmental protection and carbon reduction, is stable in production process, meets the use requirements of customers, is smooth in paper feeding in the packaging process, firm in heat sealing, free of bag breaking and sticking and excellent in barrier performance, and can be widely applied to the fields of packaging, packaging and the like. The biodegradation can be realized.

Description

Technical Field

[0001] The utility model relates to the field of packaging materials, in particular to a polypropylene cigarette film with high tensile strength. Background Art

[0002] PLA is most widely used in the packaging field. It has excellent transparency and is suitable for use as a packaging material. Soft PLA film can be processed and used as packaging bags and packaging films for various foods. Studies have shown that compared with packaging films made of other materials such as PE, PLA packaging film has better freshness preservation. Because it is a hydrophobic crystalline polymer, it has good water resistance, alcohol resistance and oil resistance, which can make fruits and vegetables and other foods stored longer. In recent years, polymer materials have flourished and have shown their magical powers in all areas of people's lives. While bringing convenience to people's lives, it has also brought a series of problems;

[0003] At present, most polymer materials belong to the category of "difficult to come and difficult to go". Difficult to come means that most of them come from non-renewable resources, and the more they are used, the less they are. Difficult to go means that it is difficult to deal with their waste and they cannot be degraded by the natural environment. Therefore, it has caused great pressure on the ecological environment. Therefore, it is urgent to find a biodegradable and widely renewable material, and polylactic acid (PLA) is an environmentally friendly polymer material that combines these advantages. It is currently the hottest green polymer material, especially at this stage, the country is promoting the "plastic restriction order", which provides a great opportunity for the development of PLA-based film. In this regard, in order to obtain a bio-based degradable biaxially oriented film, BOPLA has good biodegradability, high transparency, easy processing and other properties, and a polypropylene cigarette film with high tensile strength is proposed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a polypropylene cigarette film with high tensile strength.

[0005] To achieve the above object, the utility model provides the following technical solution: a polypropylene cigarette film with high tensile strength, comprising:

[0006] The central layer is the center of the cigarette film, and a degradation layer is provided on its surface, and degradation holes are opened. The outermost side of the degradation layer is compounded with a flame retardant layer.

[0007] The upper surface layer and the lower surface layer are both used as the outermost side of the smoke film in a protective form, wherein the upper surface layer is attached to the upper side of the central layer, and the lower surface layer is attached to the lower side of the central layer.

[0008] Furthermore, the upper surface layer, the center layer and the lower surface layer are all square, and the upper surface layer, the center layer and the lower surface layer are integrated by heating.

[0009] Furthermore, the central layer is made of copolymerized polypropylene material modified by silicon dioxide, the degradation layer is formed by stacking degradation masterbatches together, and the degradation masterbatches and the degradation holes are arranged in a staggered manner.

[0010] Furthermore, the ratio of the thickness of the flame retardant layer to the thickness of the core layer is 2:1, and the flame retardant layer is a polypropylene layer.

[0011] Furthermore, the upper surface layer and the lower surface layer are mirror images and use the same protective layer.

[0012] Furthermore, the protective layer is composed of an isolation layer, a waterproof layer and an anti-scratch layer, wherein the isolation layer is located on one side of the waterproof layer, and the anti-scratch layer is located on the other side of the waterproof layer.

[0013] Furthermore, the isolation layer is made of a high-crystallization PP layer; the waterproof layer is made of a polyurethane material; and the anti-scratch layer is made of a hard polyvinyl chloride material.

[0014] Furthermore, the thickness ratio of the isolation layer, the waterproof layer and the anti-scratch layer is 1:0.4:0.4 μm.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model has good biodegradability, high transparency, and easy processing performance, and can be used as packaging materials in the fields of food, electronic products, books, etc., which has positive significance for packaging reduction, environmental protection and carbon reduction.

[0017] 2. In the utility model, the production process is stable and meets the use needs of customers. The packaging process has smooth paper feeding, firm heat sealing, no broken or sticky packages, excellent barrier properties, and can be biodegraded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a polypropylene cigarette film with high tensile strength proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a protective layer in a polypropylene cigarette film with high tensile strength proposed by the utility model.

[0020] Legend:

[0021] 1. Upper surface layer; 2. Center layer; 3. Lower surface layer; 4. Degradation holes; 5. Flame retardant layer; 6. Degradation layer; 7. Isolation layer; 8. Waterproof layer; 9. Scratch-resistant layer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Please refer to Figure 1 The utility model provides an embodiment: a polypropylene cigarette film with high tensile strength, comprising:

[0024] The central layer 2 at the center of the cigarette film has a degradation layer 6 on its surface and degradation holes 4, and the outermost side of the degradation layer 6 is compounded with a flame retardant layer 5; the central layer 2 adopts a copolymer polypropylene material modified by silica, and the degradation layer 6 is formed by stacking degradation masterbatches together, and the degradation masterbatches and the degradation holes 4 are staggered; the thickness of the flame retardant layer 5 is 2:1 with that of the central layer 2, and the flame retardant layer 5 is a polypropylene layer, the production process is stable, and the customer's usage needs are met, the packaging process is smooth, the heat sealing is firm, there is no broken or sticky package, the barrier performance is excellent, and it can be biodegraded, and the quality rate of finished products after industrialization is ≥96.0%, and the main line start-up rate is ≥93.0%.

[0025] The upper surface layer 1 and the lower surface layer 3 are arranged in a mirror image. The upper surface layer 1, the center layer 2 and the lower surface layer 3 are integrated by heating. The upper surface layer 1, the center layer 2 and the lower surface layer 3 are all square. The upper surface layer 1 and the lower surface layer 3 are both used as the outermost side of the smoke film in a protective form. The upper surface layer 1 is attached to the upper side of the center layer 2, and the lower surface layer 3 is attached to the lower side of the center layer 2.

[0026] Please refer to Figure 2 Specifically, the upper surface layer 1 and the lower surface layer 3 use the same protective layer; the protective layer is composed of an isolation layer 7, a waterproof layer 8 and an anti-scratch layer 9, wherein the isolation layer 7 is located on one side of the waterproof layer 8, and the anti-scratch layer 9 is located on the other side of the waterproof layer 8, and an organic anti-adhesive agent is used for connection;

[0027] The isolation layer 7 is made of a high-crystalline PP layer with a thickness of 6 μm. The isolation layer 7 is made of a thick sheet by extrusion and then made of a film material by biaxial stretching. It is a colorless, transparent, and glossy film with excellent mechanical properties, high rigidity, hardness, and toughness, and is resistant to puncture, friction, high temperature, and low temperature.

[0028] The waterproof layer 8 is made of polyurethane material and has a thickness of 4 μm. It is a new type of polymer waterproof material. It uses polyurethane as the main material, introduces a hydrophilic group, and has no micropores on the surface of the film, so it can be windproof and water-repellent.

[0029] The anti-scratch layer 9 is made of hard polyvinyl chloride material and has a thickness of 4 μm. It has good tensile, bending, compression and impact resistance.

[0030] Finally, it should be noted that the above 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 make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polypropylene cigarette film with high tensile strength, characterized in that: include: A central layer (2), the central layer (2) being the center of the cigarette film, having a degradation layer (6) on its surface and having degradation holes (4), and the outermost side of the degradation layer (6) being compounded with a flame retardant layer (5); The upper surface layer (1) and the lower surface layer (3) are both used as the outermost side of the smoke film in a protective form, wherein the upper surface layer (1) is attached to the upper side of the central layer (2), and the lower surface layer (3) is attached to the lower side of the central layer (2).

2. The polypropylene cigarette film with high tensile strength according to claim 1, characterized in that: The upper surface layer (1), the central layer (2) and the lower surface layer (3) are all square in shape, and the upper surface layer (1), the central layer (2) and the lower surface layer (3) are integrated by heating.

3. The polypropylene cigarette film with high tensile strength according to claim 1, characterized in that: The central layer (2) is made of a copolymerized polypropylene material modified by silicon dioxide, and the degradation layer (6) is formed by stacking degradation masterbatches together, and the degradation masterbatches and the degradation holes (4) are arranged in an alternating manner.

4. The polypropylene cigarette film with high tensile strength according to claim 1, characterized in that: The ratio of the thickness of the flame retardant layer (5) to the thickness of the central layer (2) is 2:1, and the flame retardant layer (5) is a polypropylene layer.

5. The polypropylene cigarette film with high tensile strength according to claim 1, characterized in that: The upper surface layer (1) and the lower surface layer (3) are arranged in a mirror image and use the same protective layer.

6. The polypropylene cigarette film with high tensile strength according to claim 5, characterized in that: The protective layer is composed of an isolation layer (7), a waterproof layer (8) and an anti-scratch layer (9), wherein the isolation layer (7) is located on one side of the waterproof layer (8), and the anti-scratch layer (9) is located on the other side of the waterproof layer (8).

7. The polypropylene cigarette film with high tensile strength according to claim 6, characterized in that: The isolation layer (7) is made of a high-crystallization PP layer; the waterproof layer (8) is made of a polyurethane material; and the anti-scratch layer (9) is made of a hard polyvinyl chloride material.

8. The polypropylene cigarette film with high tensile strength according to claim 6, characterized in that: The thickness ratio of the isolation layer (7), the waterproof layer (8) and the anti-scratch layer (9) is 0.3:0.2:0.2 μm.

Images