A microwave-heatable instant food cup cover and its manufacturing process

Abstract

The invention belongs to the technical field of convenient food packaging, and particularly relates to a convenient food cup cover capable of being subjected to microwave heating and a manufacturing process of the cup cover. The manufacturing process of the convenient food cup cover, which is disclosed by the invention, can be used for ensuring that compound finished cup cover paper meets the requirement of smoothness by controlling tension among various layers of materials during various compounding procedures, simultaneously ensuring that the cup cover meets the requirement of food-stage packaging by volatilizing a residual adhesive from a compound film through a compound machine drying box during compounding, and ensuring the moistureproof property and the antioxidant property by respectively compounding a printing PET film and an inner PET film on two sides of a paper sheet. By adopting the structure, the convenient food cup cover disclosed by the invention ensures the sealing and moistureproof property, is good in smoothness and attractive in appearance, can be used for mechanical cover suction and high-speed sealing, and can be placed into a microwave oven for the microwave heating without an aluminum foil layer, and thus the requirement of fast-paced life of modern people can be met.

Description

technical field [0001] The invention belongs to the technical field of instant food packaging, and in particular relates to a microwave-heatable instant food cup cover and a manufacturing process thereof. Background technique [0002] As a kind of convenience food, instant noodles are widely welcomed by consumers for their convenience and diverse tastes. With the quickening pace of people's life, microwave ovens are used to heat food more and more widely. At present, in order to ensure its flatness, sealing and moisture-proof performance, the inner layer of the instant noodle bowl cover is made of aluminum foil, and the design structure containing the aluminum foil layer will generate electric sparks with the aluminum foil layer and reflect microwaves when the microwave oven is heated, which will damage the furnace body. It is also difficult to cook food, so aluminum-containing composite materials cannot be used for microwave heating, which is difficult to meet the fast-pace...

AI Technical Summary

Problems solved by technology

At present, in order to ensure its flatness, sealing and moisture-proof performance, the inner layer of the instant noodle bowl cover is made of aluminum foil, and the design structure containing the aluminum foil layer will generate electric sparks with the aluminum foil layer and reflect microwaves when the microwave oven is heated, which will damage the furnace body. It is also difficult to cook food, so aluminum-containing composite materials cannot be used for microwave heating, which is difficult to meet the fast-paced life needs of modern people, and if excessive intake of aluminum elements will cause certain harm to human health, aluminum-containing foods If the packaging is used for heating, the safety cannot be guaranteed

[0003] In the prior art, there are also instant food cup lids that do not contain an aluminum foil layer, such as the announcement number: CN 201686158 U, "a microwave-heatable instant noodle bowl lid", which consists of a PET film surface layer, an ink layer, a polyurethane adhesive layer, a double Copper paper layer, polyurethane adhesive layer, PET film layer, polyurethane adhesive layer and polypropylene inner layer are tightly compounded. Although the bowl cover does not contain aluminum and uses double copper paper layers to ensure flatness, the cost of double copper paper is higher than that of general The paper should be high, and the double-coated paper belongs to the coated paper, and the surface of the coated paper is smooth, the ink absorption ability is poor, and the adhesion is poor. The printed ink layer is sometimes easy to discolor due to powder falling. In the process, powder removal and black shadows are often encountered on the printed page, so double copper paper is not suitable for printing the pattern on the instant noodle bowl cover

There are also some bowl lids that adopt paper double-sided composite plastic film, such as the announcement number: CN 201154801 Y, "a kind of instant noodle bowl lid paper", which is composed of base paper, adhesive layer, plastic film, and the adhesive layer is coated on On both sides of the base paper, the plastic film is heat-sealed and compounded on the adhesive layer. The bowl cover paper is not equipped with an aluminum foil layer. When the paper is heat-sealed and compounded with the plastic film on both sides, it is difficult to ensure that its flatness meets the requirements by using ordinary compounding processes , when the flatness is too large and does not meet the composite requirements, it will be more difficult for the bowl cover to fit on the bowl body

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