Lyophobic cover film

Abstract

The utility model discloses a lyophobic cover film which comprises a printing layer, a blocking layer, a hot sticking layer and a lyophobic coating layer, the printing layer and the lyophobic coating layer are arranged on the two sides of the hot sticking layer respectively, the blocking layer is arranged between the printing layer and the hot sticking layer, the lyophobic coating layer is a lyophobic nano silicon dioxide coating, and the blocking layer is arranged between the printing layer and the hot sticking layer. The hot sticking layer does not contain fluorine, and the hot sticking layer contains one or more of PE (Polyethylene), PP (Propene Polymer) and EVA (Ethylene Vinyl Acetate). Compared with the prior art, the lyophobic cover film has the beneficial effects that the lyophobic nano silicon dioxide coating is used as the lyophobic coating layer, one or more of PE (polyethylene), PP (polypropylene) and EVA (ethylene-vinyl acetate) resin is / are used for forming the hot sticking layer, the adhesion strength of the lyophobic coating layer on the hot sticking layer is stable, the lyophobic coating layer is not easy to fall off, and the whole cover film has a lasting lyophobic effect; fluorine harmful to a human body is not contained.

Description

Technical Field

[0001] The utility model relates to the field of packaging materials, in particular to a liquid-repellent cover film. Background Art

[0002] The lyophobic cover film is a commonly used packaging material, which is mainly used to prevent yogurt from overflowing or adhering to the inner wall of the box during transportation and storage. The structure of the lyophobic cover film currently used is shown in patent publication KR101499766B1. This lyophobic cover film relies on a layer of polyfluoro alkyl methacrylate resin containing metal oxides to repel liquid, so this lyophobic cover film contains fluorine, which is not good for human health. Utility Model Content

[0003] In view of the above problems, the utility model proposes a liquid-repellent cover film, which is mainly composed of a fluorine-free resin and a hydrophobic nano-silicon dioxide coating, is harmless to the human body, and has a good hydrophobic effect.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A liquid-repellent cover film comprises a printing layer, a barrier layer, a hot-adhesive layer and a hydrophobic coating layer, wherein the printing layer and the hydrophobic coating layer are respectively arranged on both sides of the hot-adhesive layer, the barrier layer is arranged between the printing layer and the hot-adhesive layer, the hydrophobic coating layer is a hydrophobic nano-silica coating, the hot-adhesive layer does not contain fluorine, and the hot-adhesive layer contains one or more of PE, PP or EVA.

[0006] This kind of lyophobic cover film can be used as a cup cover for cup yogurt. When this kind of lyophobic cover film is used as a cup cover, the hydrophobic coating layer is located in the cup. In this kind of lyophobic cover film, a hydrophobic nano-silicon dioxide coating is used as a hydrophobic coating layer. Compared with metal oxide particles, nano-silicon dioxide has stronger stability, which can ensure that the hydrophobic coating layer has a lasting hydrophobic (liquid) effect. At the same time, since the hot adhesive layer is composed of one or more combinations of PE or PP or EVA, the hot adhesive layer does not contain harmful substances to the human body. At the same time, since one or more of PE or PP or EVA forms a hot adhesive layer by laminating, the hot adhesive layer has good viscosity, which can ensure that the hydrophobic coating layer has good adhesion stability on the hot adhesive layer, and the hydrophobic coating layer is not easy to fall off, ensuring that the entire cover film has a lasting hydrophobic effect.

[0007] In summary, in this liquid-repellent cover film, a hydrophobic nano-silica coating is used as a hydrophobic coating layer, and one or more of PE, PP or EVA resins are used to form a hot adhesive layer. The adhesion strength of the hydrophobic coating layer on the hot adhesive layer is stable, the hydrophobic coating layer is not easy to fall off, the entire cover film has a long-lasting hydrophobic effect, and does not contain fluorine that is harmful to the human body.

[0008] Optionally, the printing layer is a PE printing layer, a PP printing layer, a PET printing layer, a nylon printing layer, or a paper printing layer.

[0009] The function of the printing layer is to be used for printing, and the printing layer can be a PE film, a PP film, a PET film, a nylon film or paper.

[0010] Optionally, the barrier layer is aluminum foil or aluminum-coated PET.

[0011] Using aluminum foil or aluminized PET as the barrier layer can ensure that the barrier layer has good barrier properties.

[0012] Optionally, when the barrier layer is aluminum foil, the thickness of the barrier layer is 40 μm-100 μm.

[0013] Optionally, when the barrier layer is aluminized PET, the thickness of the barrier layer is 12 um.

[0014] Optionally, the thickness of the thermal adhesive layer is 30um-60um.

[0015] Optionally, the thickness of the printing layer is 0.5um-3um.

[0016] Optionally, the thickness of the barrier layer is greater than the thickness of the printing layer.

[0017] The beneficial effects of the utility model are: a hydrophobic nano-silicon dioxide coating is used as a hydrophobic coating layer, and one or more of PE, PP or EVA resins are used to form a hot adhesive layer. The adhesion strength of the hydrophobic coating layer on the hot adhesive layer is stable, the hydrophobic coating layer is not easy to fall off, the entire cover film has a lasting hydrophobic effect, and does not contain fluorine that is harmful to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the liquid-repellent cover membrane structure.

[0019] The reference numerals in the figure are: 1. printing layer; 2. barrier layer; 3. hot adhesive layer; 4. hydrophobic coating layer. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings.

[0021] As attached Figure 1 As shown, a liquid-repellent cover film includes a printing layer 1, a barrier layer 2, a hot adhesive layer 3 and a hydrophobic coating layer 4, the printing layer 1 and the hydrophobic coating layer 4 are respectively arranged on both sides of the hot adhesive layer 3, the barrier layer 2 is arranged between the printing layer 1 and the hot adhesive layer 3, the hydrophobic coating layer 4 is a hydrophobic nano-silicon dioxide coating, the hot adhesive layer 3 does not contain fluorine, and the hot adhesive layer 3 contains one or more of PE, PP or EVA.

[0022] This kind of lyophobic cover film can be used as a cup cover for cup yogurt. When this kind of lyophobic cover film is used as a cup cover, the hydrophobic coating layer is located in the cup. In this kind of lyophobic cover film, a hydrophobic nano-silicon dioxide coating is used as a hydrophobic coating layer. Compared with metal oxide particles, nano-silicon dioxide has stronger stability, which can ensure that the hydrophobic coating layer has a lasting hydrophobic (liquid) effect. At the same time, since the hot adhesive layer 3 is composed of one or more combinations of PE or PP or EVA, the hot adhesive layer 3 does not contain harmful substances to the human body. At the same time, since one or more of PE or PP or EVA forms the hot adhesive layer 3 by laminating, the hot adhesive layer 3 has good viscosity, which can ensure that the hydrophobic coating layer has good adhesion stability on the hot adhesive layer 3, and the hydrophobic coating layer is not easy to fall off, ensuring that the entire cover film has a lasting hydrophobic effect.

[0023] In summary, in this liquid-repellent cover film, a hydrophobic nano-silica coating is used as a hydrophobic coating layer, and one or more of PE, PP or EVA resins are used to form a hot adhesive layer 3. The adhesion strength of the hydrophobic coating layer on the hot adhesive layer 3 is stable, the hydrophobic coating layer is not easy to fall off, and the entire cover film has a long-lasting hydrophobic effect and does not contain fluorine that is harmful to the human body.

[0024] As attached Figure 1 As shown, the printing layer 1 is a PE printing layer 1 or a PP printing layer 1 or a PET printing layer 1 or a nylon printing layer 1 or a paper printing layer 1 .

[0025] The printing layer 1 is used for printing, and the printing layer 1 can be a PE film, a PP film, a PET film, a nylon film, or paper.

[0026] As attached Figure 1 As shown, the barrier layer 2 is aluminum foil or aluminum-coated PET.

[0027] Using aluminum foil or aluminum-coated PET as the barrier layer 2 can ensure that the barrier layer 2 has good barrier properties.

[0028] As attached Figure 1 As shown, when the barrier layer 2 is aluminum foil, the thickness of the barrier layer 2 is 40 μm-100 μm.

[0029] As attached Figure 1 As shown, when the barrier layer 2 is aluminized PET, the thickness of the barrier layer 2 is 12 um.

[0030] As attached Figure 1 As shown, the thickness of the hot adhesive layer 3 is 30um-60um.

[0031] As attached Figure 1 As shown, the thickness of the printed layer 1 is 0.5um-3um.

[0032] As attached Figure 1As shown, the thickness of the barrier layer 2 is greater than that of the printing layer 1, and the side of the hot adhesive layer coated with the hydrophobic coating layer is uneven.

[0033] In this liquid-repellent cover film, the barrier layer and the printed layer are not in contact with the liquid in the cup.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A liquid-repellent cover film, characterized in that: It includes a printing layer, a barrier layer, a hot adhesive layer and a hydrophobic coating layer, wherein the printing layer and the hydrophobic coating layer are respectively arranged on both sides of the hot adhesive layer, the barrier layer is arranged between the printing layer and the hot adhesive layer, the hydrophobic coating layer is a hydrophobic nano-silica coating, the hot adhesive layer does not contain fluorine, and the hot adhesive layer contains one or more of PE, PP or EVA.

2. The liquid-repellent cover film according to claim 1, wherein: The printing layer is a PE printing layer, a PP printing layer, a PET printing layer, a nylon printing layer, or a paper printing layer.

3. The liquid-repellent cover film according to claim 1, wherein: The barrier layer is aluminum foil or aluminum-plated PET.

4. The liquid-repellent cover film according to claim 3, wherein: When the barrier layer is aluminum foil, the thickness of the barrier layer is 40 μm-100 μm.

5. The liquid-repellent cover film according to claim 3, wherein: When the barrier layer is aluminized PET, the thickness of the barrier layer is 12 um.

6. The liquid-repellent cover film according to claim 1, wherein: The thickness of the heat-adhesive layer is 30um-60um.

7. The liquid-repellent cover film according to claim 1, wherein: The thickness of the printing layer is 0.5um-3um.

8. The liquid-repellent cover film according to claim 1, wherein: The thickness of the barrier layer is greater than the thickness of the printing layer.

9. The liquid-repellent cover film according to claim 1, wherein: The side of the hot adhesive layer coated with the hydrophobic coating layer is uneven.

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