A new type of environmentally friendly high-barrier direct-coated paper and its preparation process

A high-barrier, direct-plating technology, applied in the field of packaging, can solve the problems of complicated process, difficult to achieve industrial production, and inability to obtain coating at one time, and achieve the effect of rich colors and improved barrier properties.

Active Publication Date: 2022-05-20
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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  • A new type of environmentally friendly high-barrier direct-coated paper and its preparation process
  • A new type of environmentally friendly high-barrier direct-coated paper and its preparation process
  • A new type of environmentally friendly high-barrier direct-coated paper and its preparation process

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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 a new type of environmentally friendly high-barrier direct-coated paper and its preparation process. The direct-coated paper features: from bottom to top, it includes a back coat layer, a base paper layer, a base coat layer, an aluminum-coated layer and a top coat layer. The coating is a water-based coating coated on the back of the base paper, the base coat and top coat are EB cured coatings, and the aluminized layer is metal aluminum with a predetermined thickness vacuum-evaporated on the barrier layer of the base coat Floor. Production process features: including steps: (1) Coating primer on base paper; (2) Electron beam radiation curing to form primer barrier layer; (3) Vacuum evaporation aluminum plating to increase the thickness of the aluminum layer to form an aluminum plating layer; 4) Coating a top coating on the aluminized layer; (5) Curing by electron beam radiation to form a top coating barrier layer; (6) Coating a back coating on the back of the base paper. The present invention uses EB coating on the basis of the structure of the existing direct-coated paper, increases the thickness of the aluminum-coated layer, does not need to increase the coating structure, not only retains its environmental protection characteristics, but also greatly improves its barrier performance.

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 direct-...

Claims

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Application Information

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Patent Type & Authority Patents(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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