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A technology of food wrapping paper and printing method, which is applied in printing, textiles and papermaking, printing post-processing, etc., can solve problems such as adverse effects, and achieve the effects of preventing dampness, improving shelf life, and extending taste
Active Publication Date: 2015-02-25
安徽长正升科技有限公司
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Problems solved by technology
[0005] In order to solve the problem in the prior art that the printing ink on the food packaging paper has adverse effects on the human body caused by the indirect contamination of food, the present invention provides a natural pollution-free Printing paper and printing method thereof
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment 1
[0016] A printing method for food packaging paper, comprising the following steps:
[0017] Extract the anthocyanidins of 40% comfrey, 20% madder and 40% perilla by weight with an acidic aqueous solution containing 25% ethanol with a pH of less than 3, and then evaporate and concentrate it until the dry matter content reaches 45%. 5% starch by weight is added to the extraction solution with a proportion of 95%, and the mixture is evenly stirred to obtain a printing solution.
[0018] Put the wrapping paper in the oven to preheat for 30s, and the preheating temperature is 60°C;
[0019] Make embossed printing plates according to printed graphics;
[0020] Install the printing plate on the printing press and place the paper under the relief plate for printing;
[0021] After flattening the printed paper, carry out infrared hot air drying, the drying temperature is 70°C, and the drying time is 50s;
[0022] Apply simethicone evenly on the side of the paper with the printed pa...
Embodiment 2
[0025] A printing method for food packaging paper, comprising the following steps:
[0026] Extract the anthocyanidins of 40% comfrey, 20% madder and 40% perilla by weight with an acidic aqueous solution containing 25% ethanol with a pH of less than 3, and then evaporate and concentrate it until the dry matter content reaches 45%. 5% starch by weight is added to the extraction solution with a proportion of 95%, and the mixture is evenly stirred to obtain a printing solution.
[0027] Put the wrapping paper in the oven to preheat for 30s, and the preheating temperature is 75°C;
[0028] Make embossed printing plates according to printed graphics;
[0029] Install the printing plate on the printing press and place the paper under the relief plate for printing;
[0030] After flattening the printed paper, carry out infrared hot air drying, the drying temperature is 80°C, and the drying time is 30s;
[0031] Apply simethicone evenly on the side of the paper with the printed pat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention relates to a paper printing method, in particular to a food packaging paper printing method. According to the method, the anthocyanidin of lithospermum, Indian madder and purple perilla is extracted through an ethanol acid aqueous solution, the extracted solution is steamed and inspissated, till the dry matter content reaches 45%, starch is added into the extracted solution and stirred evenly, and a printing solution is obtained; the packaging paper is put into a drying oven to be preheated, a convex printing plate is manufactured according to the printing image-text, the printing plate is arranged on a printing machine, and the paper is placed under the convex printing plate to conduct printing; infrared hot air drying is conducted on the printed paper after the printed paper is flattened; the face, provided with the printed pattern, of the paper is evenly coated with simethicone, and then infrared hot air drying is conducted on the paper; the face, provided with the printed pattern, of the paper is evenly coated with plant resin, and then infrared hot air drying is conducted. According to the food packaging paper printing method, the printing solution is obtained through the pigment extracted from pure plants, the paper is preheated before printing is conducted, and the printing quality is improved; the paper generated after the simethicone processing is conducted has good printing, folding and adhesive characteristics and the like, and further has certain waterproof performance; after the plant resin processing is conducted, the manufactured paper can refresh the baked food, and the taste of the food is maintained.
Description
technical field [0001] The invention relates to a paper printing method, in particular to a printing method for food wrapping paper. Background technique [0002] Among the four pillars of modern packaging - paper, plastic, metal, and glass materials, the consumption of paper is growing the fastest. Paper is cheap and has a wide range of raw materials. Not as heavy as metal and easy to carry. In addition, paper products are easy to rot, which can be recycled or used as plant fertilizer, and can reduce air pollution and protect the environment. Therefore, compared with the three major packagings of plastic, metal and glass, paper packaging is one of the most useful green packaging materials. [0003] Pulp is made by crushing waste paper or finished pulp into mud, which is vacuum-adsorbed and molded into products, referred to as paper molds for short. It is usually divided into two categories: fast food boxes, convenience bowls and other daily necessities produced with fini...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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