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Novel environment-friendly high-barrier direct plating paper and preparation process thereof

A high-barrier and environmentally-friendly technology, applied in the packaging field, can solve the problems of complex process, difficulty in realizing industrial production, and inability to obtain coating at one time, so as to achieve the effect of rich colors and improved barrier properties

Active Publication Date: 2020-02-28
YANTAI BOYUAN TECH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A large number of barrier lining paper processes disclosed in the prior art increase the barrier property by changing the layer structure of the direct-coated paper or improving the water-based coating formula. The barrier effect of the mentioned water-based coating is limited, and it is difficult to match the function of aluminum foil
For example, the patent application "An Environmentally Friendly Lining Paper" with the application number of 201720804277.9 discloses a lining paper that can increase the barrier properties of packaging materials without aluminum foil. By coating PVDC coatings on both sides of the paper base, the paper base There is a through hole on the top, and there is a connecting column passing through the through hole between the two PVDC coatings. The structure is complicated and it is difficult to realize industrial production; For traditional direct-coated paper, the main component of the high-barrier coating, polyvinyl alcohol, is a common chemical component in the surface coating process of direct-coated paper, and the patent does not explain its barrier effect
[0005] The vacuum evaporation aluminum plating technology used in the existing published direct paper plating process usually means that when the resistance is heated to 1350~1500°C in a vacuum environment, aluminum is evaporated onto the substrate, and the thickness of the aluminum layer is 0.020~0.040μm. The patent on the influence of the thickness of the aluminum layer on the barrier property, but there are some patents that have changed the coating material, such as the patent application "High barrier aluminized paper and its preparation method" with application number 201711403966.X, which mentioned the inorganic barrier layer and transition layer They are all made by vacuum evaporation technology. The coating is a mixed layer of silicon carbide, silicon dioxide, and aluminum oxide. The composition is complex and can only be obtained by multiple electron beam evaporation, which increases the complexity of the process and cannot Get the desired coating

Method used

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  • Novel environment-friendly high-barrier direct plating paper and preparation process thereof
  • Novel environment-friendly high-barrier direct plating paper and preparation process thereof
  • Novel environment-friendly high-barrier direct plating paper and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A new type of environmentally friendly high-barrier direct-coated paper includes a back coat layer 5, a base paper layer 1, an undercoat layer 2, an aluminum-coated layer 3, and a top coat layer 4 arranged in sequence. The production process includes the following steps:

[0050] (1) The quantification is 50g / m², and the tightness is 1.2g / cm 3 The base paper is coated with an electron beam cured coating on a high-speed coating machine (the formula is calculated by weight ratio: 35 parts of hyperbranched polyester acrylate, 35 parts of polyurethane acrylate, 20 parts of IOBA, 10 parts of HDDA, and 0.01 part of silicone resin). The primer barrier layer is formed by electron beam radiation curing, the temperature of the material is controlled at 45±2°C, the viscosity of Caien 3# cup is 20 seconds, the speed is 200m / min, the curing dose is 10KGy, and the coating amount is 1.0g / m 2 ;

[0051] (2) The dried paper is aluminized by vacuum evaporation, the square resistance val...

Embodiment 2

[0056] A new type of environmentally friendly high-barrier direct-coated paper includes a back coat layer 5, a base paper layer 1, an undercoat layer 2, an aluminum-coated layer 3, and a top coat layer 4 arranged in sequence. The production process includes the following steps:

[0057] (1) The quantification is 80g / m², and the tightness is 1.1g / cm 3 The base paper is coated with an electron beam cured coating on a high-speed coating machine (formula: 40 parts of hyperbranched polyester acrylate, 30 parts of polyurethane acrylate, 15 parts of IOBA, 15 parts of HDDA, and 0.01 part of polyacrylate), formed by electron beam radiation Primer barrier layer, the temperature of the material is controlled at 45±2°C, the viscosity of Caien 3# cup is 23 seconds, the speed is 600m / min, the curing amount is 20KGy, and the coating amount is 1.5g / m²;

[0058] (2) The dried paper is aluminized by vacuum evaporation, the resistance value of the aluminum layer is 0.45 square ohms, and the spee...

Embodiment 3

[0063] A new type of environmentally friendly high-barrier direct-coated paper includes a back coat layer 5, a base paper layer 1, an undercoat layer 2, an aluminum-coated layer 3, and a top coat layer 4 arranged in sequence. The production process includes the following steps:

[0064] (1) The quantification is 100g / m², and the tightness is 1.1g / cm 3 The base paper is coated with an electron beam cured coating on a high-speed coating machine (formula: 45 parts of hyperbranched polyester acrylate, 25 parts of polyurethane acrylate, 10 parts of IOBA, 20 parts of HDDA, and 0.05 parts of polyacrylate), formed by electron beam radiation Primer barrier layer, material temperature controlled at (25±2)°C, T4 cup viscosity 22 seconds, vehicle speed 800m / min, coating amount 2g / m²; curing dose 30KGy

[0065] (2) The dried paper is aluminized by vacuum evaporation, the square resistance value of the aluminum layer is 0.6 ohms, and the speed is 15m / s.

[0066] (3) Topcoat the aluminized ...

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Abstract

The invention relates to novel environment-friendly high-barrier direct plating paper and a preparation process thereof. The direct plating paper sequentially comprises a back coating, a raw paper layer, a bottom coating, an aluminum plating layer and a surface coating from bottom to top, wherein the back coating is a water-based coating coated on the back surface of raw paper, the bottom coatingand the surface coating are EB cured coatings, and the aluminum plating layer is a metal aluminum layer plated on a bottom coating barrier layer in a vacuum evaporation manner and having a preset thickness. The production process is characterized by comprising the following steps: (1) coating base paper with a primer; (2) carrying out electron beam radiation curing to form a prime coat barrier layer; (3) carrying out vacuum evaporation aluminizing to increase the thickness of an aluminum layer so as to form an aluminized layer; 4) coating the aluminized layer with a surface coating material; (5) carrying out electron beam radiation curing to form a surface coating barrier layer; and (6) coating the back surface of the raw paper with a back coating. According to the invention, the EB coating layer is used on the basis of the structure of the existing direct plating paper, such that the thickness of the aluminum plating layer is increased, the coating structure does not need to be added,the environmental protection property is retained, and the barrier property is substantially improved.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to a direct-coated paper with environmental protection and high barrier properties and a preparation process thereof. Background technique [0002] High-barrier packaging materials need to effectively block water loss and oxygen entry, so as to protect the products inside from light, oxygen or moisture damage, and reduce the risk of food deterioration and flavor loss. They are mainly used in food, medicine, pet food, etc. fields. [0003] At present, the more common packaging materials on the market include aluminum foil paper, paper-plastic composite packaging film, aseptic packaging materials, aluminum foil paper and direct-coated paper, etc. Most of these materials use a large amount of plastic and aluminum foil in the production process. Although aluminum foil has Excellent fragrance retention, but there are problems of difficult recycling and waste of resources. The direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H19/08D21H19/84D21H19/82D21H19/28D21H19/24D21H19/32D21H19/20D21H19/14D21H19/16D21H19/40D21H19/44D21H19/60D21H19/62D21H19/56B65D65/42
CPCD21H27/10D21H19/08D21H19/84D21H19/82D21H19/28D21H19/24D21H19/32D21H19/20D21H19/14D21H19/16D21H19/40D21H19/44D21H19/60D21H19/62D21H19/56B65D65/42Y02W30/80
Inventor 黄立朋薛守成杨建青阚方俊王玉燕
Owner YANTAI BOYUAN TECH MATERIALS
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