CN212242505U - Paper-plastic composite packaging film - Google Patents

Abstract

The utility model discloses a paper-plastic composite packaging film, by outer adoption adhesive with biaxial stretching polypropylene thin layer, beautiful line ply, polyurethane net layer, aluminium foil layer, modified polyethylene thin layer bonding together to be equipped with UV gloss oil layer on both sides limit. The utility model has novel structure, strong practicability and wide application and packaging product category range, and can be made into a big packaging bag or a disposable small packaging bag; the special texture of the textured paper layer can enhance the visual effect, meet the requirement of high-end packaging and improve the packaging grade; the polyurethane mesh layer structure can improve the mechanical property and meet the use requirement under special environment; the UV gloss oil layer can cover the exposed positions of two side edges of the composite material to prevent glue leakage and overflow; the solvent in the traditional dry-type composite process is abandoned, and more environment-friendly polyurethane resin is used as the adhesive, so that the potential hazard of solvent residue and the pollution to the environment are eliminated.

Description

Paper-plastic composite packaging film

Technical Field

The utility model relates to a compound packaging film is moulded to paper belongs to the compound packaging film field.

Background

The composite packaging film is formed by printing, compounding and other processes of a plurality of layers of films, has good comprehensive performance and is widely applied to various fields; according to the material classification, the composite packaging film is divided into an aluminum-plastic composite packaging film and a plastic-plastic composite packaging film. At present, the composite packaging film on the market has single structure and poor mechanical property, the used bonding solvent can cause certain pollution to the environment, in the process of packaging or transportation, the phenomena of breakage and tearing are common, and the novel and special products also provide higher quality requirements for the composite packaging film, such as environmental protection, corrosion resistance, high temperature resistance and strong tensile property. Obviously, the current composite packaging film cannot meet the use requirements of people.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the paper-plastic composite packaging film is provided, and the comprehensive performance of the product is far higher than that of the traditional composite packaging product.

In order to achieve the above object, the utility model adopts the following technical scheme: a paper-plastic composite packing film is composed of printing layer, paper layer, non-metal net layer, metal layer and polyethylene layer, which are adhered together by adhesive, and two protecting layers on both sides.

Preferably, the printing layer is a polyethylene terephthalate (PET) film layer or a biaxially oriented polypropylene (BOPP) film layer.

Preferably, the paper layer is a textured paper layer.

Preferably, the non-metal net layer is a polyurethane net layer.

Preferably, the metal layer is an aluminum foil (Al) layer.

Preferably, the polyethylene layer is a modified Polyethylene (PE) layer.

Preferably, the adhesive is a polyurethane resin.

Preferably, the protective layer is a UV varnish layer.

Compared with the prior art, the beneficial effects of the utility model reside in that: the structure is novel, the practicability is strong, the application packaging product category range is wide, and a large packaging bag or a disposable small packaging bag can be manufactured; the special texture of the paper layer can enhance the visual effect, meet the requirement of high-end packaging and improve the packaging grade; the non-metal net layer structure can improve the mechanical property and meet the use requirement under special environment; the protective layer can cover the exposed positions of two side edges of the composite material to prevent glue leakage and overflow; the solvent in the traditional dry-type composite process is abandoned, and more environment-friendly polyurethane resin is used as the adhesive, so that the potential hazard of solvent residue and the pollution to the environment are eliminated.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

The names corresponding to the marks in the drawings are as follows: the composite film comprises a 1-biaxial stretching polypropylene film layer, a 2-textured paper layer, a 3-polyurethane mesh layer, a 4-aluminum foil layer, a 5-modified polyethylene film layer and a 6-UV gloss oil layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person without creative work all fall into the protection scope of the present invention.

As shown in fig. 1: a paper-plastic composite packaging film comprises a biaxially oriented polypropylene film layer 1, a textured paper layer 2, a polyurethane mesh layer 3, an aluminum foil layer 4 and a modified polyethylene film layer 5 from outside to inside, wherein the layers are bonded by polyurethane resin, and UV gloss oil layers 6 are arranged on two side edges.

The biaxially oriented polypropylene film layer 1 is a multi-layer co-extruded film, is prepared by co-extruding polypropylene particles to form a sheet and then stretching the sheet in longitudinal and transverse directions, and has good heat resistance, mechanical properties and chemical properties; the textured paper layer 2 has concave-convex regular textures and is rich in aesthetic feeling, and is a high-tech paper for decoration and spraying; the polyurethane mesh layer 3 has good mechanical properties, and the mesh structure ensures that the mechanical properties of the polyurethane mesh layer are the same in all directions; the aluminum foil layer 4 is a hot stamping material which is directly rolled into a thin sheet by metal aluminum, and the material has certain strength and has the characteristics of light tightness, corrosion resistance, strong barrier property, no toxicity, no odor and the like; the modified polyethylene film layer 5 has the characteristics of acid and alkali resistance, corrosion resistance, high heat seal strength and the like; the UV gloss oil layer 6 is formed and dried by UV gloss oil under the irradiation of ultraviolet rays with certain wavelength and by utilizing the energy of the ultraviolet rays, and the cured gloss oil has stable chemical properties and no pollution discharge.

The preparation method of the utility model is as follows:

coating polyurethane resin on the corona treatment surface of the biaxially oriented polypropylene film layer 1 during first compounding, wherein the coating amount is controlled to be 3 g/square meter; pretreating the textured paper layer 2, improving the composite strength of paper and plastic, gluing the biaxially oriented polypropylene film layer 1, laminating the glued biaxially oriented polypropylene film layer and the textured paper layer 2 under the pressure of a steel roller of 0.15-0.3mpa, and then rolling to produce a composite material A; the composite material A is sent into a thermostat with the temperature of 45-50 ℃ to be kept stand for 24 hours, so that the strength of the composite material A meets the primary requirement; the composite material A reserves the advantages of the biaxially oriented polypropylene film layer 1 and the textured paper layer 2, and has excellent performance and visual effect.

The second compounding is to coat polyurethane resin on the modified polyethylene film layer 5, and to wind the aluminum foil layer 4 and the modified polyethylene film layer 5 after pressing under the unreeling tension of 5-40N, so as to produce a composite material B; the composite material B is sent into a thermostat with the temperature of 38 ℃ to be kept stand for 24 hours, so that the strength of the composite material B meets the primary requirement; the composite material B reserves the respective advantages of the aluminum foil layer 4 and the modified polyethylene film layer 5, and has strong barrier property and stable chemical property.

Before the third compounding operation, the composite material A is cooled to room temperature through sufficient natural cooling, and then the next working procedure can be carried out.

The third compounding is that a polyurethane mesh layer 3 is arranged between the composite materials A and B, and the composite material A, the polyurethane mesh layer 3 and the composite material B are bonded by polyurethane resin and then pressed to obtain a composite material C; wherein, the polyurethane mesh layer 3 can improve the mechanical property of the product, and the mesh structure can ensure that the coated polyurethane resin is uniform and is not accumulated.

Coating UV gloss oil on two side edges of the composite material C, and irradiating and curing by an Ultraviolet (UV) lamp to form a UV gloss oil layer 6 and obtain a composite packaging film; the UV gloss oil layer 6 covers the side edges of the five-layer structure from outside to inside, so that the phenomena of glue leakage and glue overflow are prevented.

The composite packaging film is sent into a constant temperature box to be kept stand for 48 hours so as to achieve the best curing effect and complete the production of the whole high-barrier and high-strength composite packaging film; the third constant temperature treatment ensures that the composite packaging film has stable structure, high composite strength and no obvious tight edge upwarp phenomenon.

Claims (7)

1. The utility model provides a compound packaging film is moulded to paper which characterized in that: the paper-plastic composite packaging film comprises a printing layer, a paper layer, a non-metal net layer, a metal layer and a polyethylene layer from outside to inside in sequence, wherein the layers are bonded by an adhesive, and protective layers are arranged on two side edges.

2. A paper-plastic composite packaging film as claimed in claim 1, wherein: the printing layer is a polyethylene terephthalate film layer or a biaxially oriented polypropylene film layer.

3. A paper-plastic composite packaging film as claimed in claim 1, wherein: the paper layer is a textured paper layer.

4. A paper-plastic composite packaging film as claimed in claim 1, wherein: the non-metal net layer is a polyurethane net layer.

5. A paper-plastic composite packaging film as claimed in claim 1, wherein: the metal layer is an aluminum foil layer.

6. A paper-plastic composite packaging film as claimed in claim 1, wherein: the polyethylene layer is a modified polyethylene film layer.

7. A paper-plastic composite packaging film as claimed in claim 1, wherein: the protective layer is a UV gloss oil layer.

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