Composite paper with metallic surface

Abstract

The utility model provides composite paper with a metallic surface, which comprises a composite layer with a body paper layer and a vacuum aluminum-plated layer, the composite layer structurally comprises a protective layer, an aluminum oxide layer, the vacuum aluminum-plated layer, an information layer, a PET (polyethylene terephthalate) film layer, a bonding layer, the body paper layer and a barrier layer, and a second aluminum oxide layer is arranged between the vacuum aluminum-plated layer and the information layer. The aluminum oxide layer formed by oxidizing the upper surface and the lower surface of the vacuum aluminum-plated layer is adopted, and the aluminum oxide layer can be tightly combined with the protective layer and the information layer on the upper portion and the lower portion, so that the phenomena of stripping, layering and the like between the protective layer and the vacuum aluminum-plated layer or between the vacuum aluminum-plated layer and the information layer after ink is printed on the composite paper are prevented, bubble points are avoided, and the service life is prolonged. Stains and the like.

Description

Technical Field

[0001] The utility model relates to packaging materials, in particular to composite paper with a metallic surface. Background Art

[0002] Composite paper with a metallic surface is a composite paper with a metallic texture formed by aluminizing a PET film carrying an information layer and then compounding it with base paper through a composite adhesive. Its composite layer structure is: PET film layer / information layer / aluminized layer / adhesive layer / base paper layer / barrier layer. However, during the compounding process, the composite adhesive of the adhesive layer will affect the information layer through the aluminized layer, causing the information layer and the aluminized layer to peel off and delaminate, resulting in undesirable performance such as bubbles and stains. For some products with special performance requirements, the information layer on the PET film surface will be facing up, and the composite layer structure formed is: aluminized layer / information layer / PET film layer / adhesive layer / base paper layer / barrier layer, or protective layer / aluminized layer / information layer / PET film layer / adhesive layer / base paper layer / barrier layer, but another hidden danger is that the printing ink adheres to the protective layer, and the protective layer and the aluminized layer are easily peeled off and delaminated, which also produces undesirable performance such as bubbles and stains. Utility Model Content

[0003] The utility model aims to provide a composite paper with a metallic surface, so as to solve the defects of local peeling, bubble points, stains and the like after the composite paper is printed with ink.

[0004] The composite paper with a metallic surface of the utility model comprises a composite layer having a base paper layer and a vacuum aluminum-plated layer, wherein the composite layer structure is: protective layer / aluminum oxide layer / vacuum aluminum-plated layer / information layer / PET film layer / adhesive layer / base paper layer / barrier layer.

[0005] Preferably, there is a second aluminum oxide layer between the vacuum aluminum coating layer and the information layer, and the thickness of the second aluminum oxide layer is preferably 8-10 nm.

[0006] Preferably, the base paper layer is white cardboard.

[0007] The thickness of the vacuum aluminum plating layer is 30-36nm.

[0008] The thickness of the aluminum oxide layer between the protective layer and the vacuum aluminum plating layer is 4-6nm.

[0009] The utility model adopts an aluminum oxide layer formed by oxidizing the upper and lower surfaces of the vacuum aluminum plating layer, and the aluminum oxide layer can be tightly combined with the upper and lower protective layers and information layers to prevent peeling and stratification between the protective layer and the vacuum aluminum plating layer or between the vacuum aluminum plating layer and the information layer after the composite paper is printed with ink, thereby avoiding defects such as bubble points and stains. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the composite paper structure layer of the utility model. DETAILED DESCRIPTION

[0011] Figure 1 The composite paper shown includes, in order: protective layer 9 / first aluminum oxide layer 8 / vacuum aluminum coating layer 7 / second aluminum oxide layer 6 / information layer 5 / PET film layer 4 / adhesive layer 3 / base paper layer 2 / barrier layer 1.

[0012] The barrier layer 1 is a polyvinyl alcohol or acrylic polymer coating. The polyvinyl alcohol or acrylic polymer is dissolved in water to form a coating liquid, which is applied to the back of the base paper layer 2 and dried to form a film coating with a thickness of 0.2-1um, which plays a role in moisturizing and blocking water vapor, avoiding curling and local bulging caused by moisture absorption of the composite paper, so that the composite paper remains flat and the four edges are neat after multiple layers are stacked.

[0013] Base paper layer 2 is 150-300g / m 2 white cardboard.

[0014] The adhesive layer 3 is a common composite glue layer. After the composite glue is coated on the PET film 4 or the base paper layer 2 , the PET film 4 and the base paper layer 2 can be pressed and pasted together.

[0015] The PET film layer 4 is a PET film with a thickness of 10-16 um, preferably 12-14 um.

[0016] The information layer 5 is a coating layer with laser information. The thickness of the information layer is 0.8-2um, preferably 1.3-1.5um. The information layer 5 is formed by coating the coating layer on the PET film layer 4 and then transferring the laser information on the nickel plate to the surface of the coating layer under high temperature and high pressure.

[0017] The second aluminum oxide layer 6 has a thickness of 8-10 nm, and the vacuum aluminum layer 7 has a thickness of 30-36 nm. The information layer 5 is surface treated by plasma, and the plasma gas is a mixed gas of argon and oxygen. After the surface of the information layer 5 is treated by plasma, oxygen is adsorbed and / or oxidized on the surface, and then vacuum aluminum is plated, thereby forming the second aluminum oxide layer 6 between the vacuum aluminum layer 7 and the information layer 5.

[0018] The first aluminum oxide layer 8 has a thickness of 4-6 nm. The vacuum aluminum coating layer 7 formed after vacuum aluminum coating is subjected to surface corona oxidation treatment to obtain the second aluminum oxide layer 8.

[0019] The protective layer 9 has a thickness of 0.9-1.2 um and is used to protect the surface of the first aluminum oxide layer 8. The protective layer 9 is obtained by coating and drying a polymer coating having a solid content of 18-25 wt%.

[0020] The utility model composite paper can be produced by the following steps: coating a coating layer on one surface of a PET film 4, then embossing to form an information layer 5, subjecting the information layer 5 to surface plasma and oxidation treatments, vacuum aluminum plating to form a second aluminum oxide 6 and a vacuum aluminum plating layer 7, coating the other surface of the PET film 4 with composite glue to form an adhesive layer 3, compounding with a base paper layer 2, then coating a barrier layer 1 on the other surface of the base paper layer 2, then subjecting the vacuum aluminum plating layer 7 to corona and oxidation treatments to obtain a first aluminum oxide layer 8, and coating a protective layer 9 on the first aluminum oxide layer 8.

[0021] The utility model effectively improves the interlayer bonding strength of the material without increasing the material cost. After printing, the 100-grid test was carried out with reference to "GB / T9286-1998 Scratch Test of Paint and Varnish Film", and the ISO grade was 5B. The layer structure is a composite paper of protective layer / aluminum-plated layer / information layer / PET film layer / adhesive layer / base paper layer / barrier layer, and the 100-grid test was carried out, and the ISO grade was 2B.

Claims

1. A composite paper with a metallic surface, comprising a composite layer having a base paper layer and a vacuum aluminum-plated layer, characterized in that: The composite layer structure is: protective layer / aluminum oxide layer / vacuum aluminum plating layer / information layer / PET film layer / adhesive layer / base paper layer / barrier layer.

2. The composite paper according to claim 1, characterized in that: There is a second aluminum oxide layer between the vacuum aluminum coating layer and the information layer.

3. The composite paper according to claim 2, characterized in that: The thickness of the second aluminum oxide layer is 8-10 nm.

4. The composite paper according to claim 1 or 2, characterized in that: The base paper layer is white cardboard.

5. The composite paper according to claim 1 or 2, characterized in that: The thickness of the vacuum aluminum plating layer is 30-36nm.

6. The composite paper according to claim 1 or 2, characterized in that: The thickness of the aluminum oxide layer between the protective layer and the vacuum aluminum plating layer is 4-6nm.

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