Environment-friendly recyclable food packaging paper

Abstract

The utility model relates to an environment-friendly recyclable food packaging item using paper to replace plastic, in particular to environment-friendly recyclable food packaging paper which comprises a base paper layer, an ink layer is arranged on the upper surface of the base paper layer, a water-resistant oil-resistant coating is arranged on the upper surface of the ink layer, and an oil-resistant water-resistant bottom coating is arranged on the lower surface of the base paper layer. According to the utility model, the multi-layer structure is arranged, the functions of water resistance, oil resistance and oxygen resistance can be realized, the heat sealing performance is realized, the maximum value of the heat sealing strength is greater than or equal to 4N / 15mm, the minimum value of the heat sealing strength is greater than or equal to 1N / 15MM, the heat sealing layer is peeled off from fibers of the paper instead of being peeled off from the coatings, and the heat sealing performance is good. Therefore, the functions of water vapor resistance, oxygen resistance and grease resistance are effectively achieved.

Description

Technical Field

[0001] The utility model relates to an environmentally friendly recyclable food wrapping paper. Background Art

[0002] Existing food packaging materials are either made of paper or plastic. Plastic packaging materials cannot be degraded and do not meet the environmental protection requirements. Although paper packaging materials can be degraded and recycled, they lack toughness and do not have the functions of moisture and grease resistance. Therefore, an environmentally friendly recyclable food wrapping paper is proposed, which uses special paper instead of plastic and is mainly used as a food contact packaging material. It has high toughness, is semi-transparent white, and is a roll paper. The main quality requirements are high toughness and the ability to adapt to the operation of vertical or horizontal automatic packaging machines without breaking. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide an environmentally friendly recyclable food wrapping paper to achieve the purpose of environmental protection, recyclability, and compostability, and the final product can enter the paper recycling stream.

[0004] To achieve the above object, according to one aspect of the utility model, there is provided an environmentally friendly recyclable food wrapping paper, including a base paper layer. An ink layer is provided on the upper surface of the base paper layer. A moisture and grease resistant coating is provided on the upper surface of the ink layer. A moisture and grease resistant bottom coating is provided on the lower surface of the base paper layer. An oxygen barrier coating is provided on the lower surface of the moisture and grease resistant bottom coating. A heat-sealing coating is provided on the lower surface of the oxygen barrier coating.

[0005] Further, the basis weight of the base paper layer is 40 g / m² to 90 g / m², and the dry coating amounts of the ink layer and the moisture and grease resistant coating are about 2 g / m² respectively.

[0006] Further, the dry coating amount of the moisture and grease resistant bottom coating is about 2 g / m², the dry coating amount of the oxygen barrier coating is about 1 - 2 g / m², and the dry coating amount of the heat-sealing coating is 4 - 7 g / m².

[0007] Further, the maximum heat-sealing strength of the heat-sealing coating is ≥4 N / 15 mm, and the minimum value is ≥1 N / 15 mm. The peeling of the heat-sealing layer is from the paper fibers, rather than from the coating.

[0008] Further, the base paper layer, the ink layer, the moisture and grease resistant coating, the moisture and grease resistant bottom coating, the oxygen barrier coating, and the heat-sealing coating are all coated by an anilox roll or a transfer roll.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model is provided with a multi-layer structure, which can function as moisture barrier, grease barrier and oxygen barrier, and has heat-sealing performance. The maximum heat-sealing strength is ≥4 N / 15 mm, and the minimum is ≥1 N / 15 MM. The peeling of the heat-sealing layer is from the fibers of the paper rather than from the coating, so as to achieve the purpose of recyclable, compostable and degradable environmental protection packaging by replacing plastic with paper. Description of the Drawings

[0011] Figure 1 It is a schematic enlarged view of the partial structure of the utility model;

[0012] Figure 2 It is a schematic exploded view of the utility model.

[0013] Illustration: 1. Base paper layer; 2. Ink layer; 3. Moisture and grease barrier coating; 4. Moisture and grease barrier bottom coating; 5. Oxygen barrier coating; 6. Heat-sealing coating. Detailed Embodiments

[0014] To further elaborate on the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the following combines the drawings and preferred embodiments to detail the specific embodiments, structures, features and their effects of the utility model as follows.

[0015] Please refer to Figures 1 - 2 , an environmentally friendly recyclable food packaging paper provided by an embodiment of the utility model, includes a base paper layer 1. The base paper layer 1 is a special paper base layer, specifically kraft paper, which has good toughness itself, is used to connect other layers, and is degradable and recyclable. An ink layer 2 is provided on the upper surface of the base paper layer 1. The ink layer 2 facilitates printing. A moisture and grease barrier coating 3 is provided on the upper surface of the ink layer 2. The moisture and grease barrier coating 3 is specifically made of acrylic acid and kaolin. The moisture and grease barrier coating 3 is used to isolate moisture and grease in food packaging and prevent damage to the inside and outside of the base paper layer 1. A moisture and grease barrier bottom coating 4 is provided on the lower surface of the base paper layer 1. A waterproof and oil-proof coating is applied to this coating, which is provided on the other side of the base paper layer 1. On the one hand, it fills the pores of the paper, and on the other hand, it also has the function of moisture and grease barrier. An oxygen barrier coating 5 is provided on the lower surface of the bottom coating 4. The oxygen barrier coating 5 plays a role in preventing oxygen penetration. The oxygen barrier coating 5 is made of EVOH material, which has a very high oxygen barrier rate. A heat-sealing coating 6 is provided on the lower surface of the oxygen barrier coating 5. The heat-sealing coating 6 effectively seals, and the heat-sealing coating 6 is mainly water-based EVA hot melt adhesive and PE emulsion.

[0016] Specifically, the basis weight of the base paper layer 1 is 40 g / m² to 90 g / m², and the dry coating weights of the ink layer 2 and the water vapor and grease barrier coating 3 are about 2 g / m². The dry coating weight of the water vapor and grease barrier primer 4 is about 2 g / m², the dry coating weight of the oxygen barrier coating 5 is about 1 - 2 g / m², and the dry coating weight of the heat-sealing coating 6 is about 4 - 7 g / m².

[0017] Specifically, the maximum heat-sealing strength of the heat-sealing coating 6 is ≥4 N / 15 mm, and the minimum value is ≥1 N / 15 mm. The peeling of the heat-sealing coating 6 is from the fibers of the paper, rather than from the coating.

[0018] In the embodiment of the present invention, the heat-sealing coating 6 performs heat-sealing work.

[0019] Specifically, the base paper layer 1, the ink layer 2, the water vapor and grease barrier coating 3, the water vapor and grease barrier primer layer 4, the oxygen barrier coating 5 and the heat-sealing coating 6 are all coated by an anilox roll. In this embodiment, coating can also be performed by a transfer roll.

[0020] In the embodiment of the present invention, in use, the base paper layer 1 is a special paper base layer for connecting other layers. The ink layer 2 is provided with ink for convenient printing. The water vapor and grease barrier coating 3 and the water vapor and grease barrier primer layer 4 are made of acrylic acid and kaolin. The water vapor and grease barrier coatings 3 and 4 are used to isolate water vapor and grease to prevent damage to the inside of the base paper layer 1. The oxygen barrier coating 5 plays a role in preventing oxygen penetration, and the heat-sealing coating 6 effectively performs heat-sealing.

[0021] The above is only a preferred embodiment of the present invention. The present invention can implement 1 or 2 or 3 or 4 coatings according to the final packaging use and functional requirements, and it is not limited to any form of the present invention. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content without departing from the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An environmentally friendly and recyclable food packaging paper, comprising a base paper layer (1), characterized in that: The upper surface of the base paper layer (1) is provided with an ink layer (2), the upper surface of the ink layer (2) is provided with a water vapor barrier grease coating (3), the lower surface of the base paper layer (1) is provided with a water vapor barrier grease primer coating (4), the lower surface of the water vapor barrier grease primer coating (4) is provided with an oxygen barrier coating (5), the oxygen barrier coating (5) is made of EVOH, the lower surface of the oxygen barrier coating (5) is provided with a heat seal coating (6), and the heat seal coating (6) is peeled off from the paper fibers when peeled off; the basis weight of the base paper layer (1) is 40 g / m2 to 90 g / m2, the dry coating weights of the ink layer (2) and the water vapor barrier grease coating (3) are respectively about 2 g / m2; the dry coating weight of the water vapor barrier grease primer coating (4) is 2 g / m2, the dry coating weight of the oxygen barrier coating (5) is 1-2 g / m2, and the dry coating weight of the heat seal coating (6) is 4-7 The maximum heat sealing strength of the heat sealing coating (6) is ≥4N / 15mm, and the minimum heat sealing strength is ≥1N / 15mm; the base paper layer (1), the ink layer (2), the water vapor barrier grease coating (3), the water vapor barrier grease primer coating (4), the oxygen barrier coating (5) and the heat sealing coating (6) are all coated by an anilox roller.

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