Discussion on Surface Printing Methods of Paper Mold Sales Packaging Products (I)

Abstract: Although China's paper mold production has a certain level, but the variety is still single, and its subsequent sequential processing technology is not perfect, which is one of the main factors that restrict the popularization and application of paper molds. This paper discusses the surface printing methods of paper-type packaging products, and hopes to make paper-based molds develop in the sales and packaging field.

Keywords: paper mold sales packaging printing

1 Introduction

Pulp moulding products are rich in raw materials, and the pollution-free products in production and use are light in weight, high in compressive strength and have good cushioning properties. As a packaging product, it has a wide range of applications in the world'. It can be used for disposable tableware, food and medicine or their semi-finished products packaging, fresh eggs, fruits, flowers, crops, glass products, ceramic products, electronic products, handicrafts, medical equipment, machinery The packaging of equipment parts and other fragile products can also be used to make special materials such as children's toys, drama props, mannequins, furniture, and parts. Although the industrial production line for paper mold production in China has reached a certain level, the variety is still single. The reason is that for the paper mold sales packaging, its appearance is not beautiful enough, lacks the necessary graphic description and decoration, and must be used in conjunction with other packaging products. It can be seen that there is no proper printing process to make it obstructed in the circulation, which is also one of the main factors that restrict the popularization and application of paper molds. If we improve the structure of our products and print color images on the surface, integrating the integrated functions of protection, environmental protection, promotion, and guidance, we will be able to increase the added value of products, and the market prospects will be even broader.

2. Applicability analysis of surface printability of paper packaging products

Printing suitability refers to the use of a certain printing method. When the reproduction of a printed matter is performed at a necessary printing speed, a necessary printing quantity, and a necessary printing quality, the printing material, the ink, the printing machine, the printing plate, and the printing conditions are matched and suitable. Print job performance. Factors directly affecting printability include substrates, inks, printing machinery (pressure and speed), and printing shop conditions (temperature, humidity, lighting). Among them, the more prominent factors are, the more the printing quality is greater. Factors affecting. From this we can see that the correct analysis of the printing suitability of the substrate is the key to ensure the printing quality. For packaging products, the analysis of printability can be carried out from both the material properties and the product structure.

2,1 paper mold material characteristics

Pulp molding products are natural fiber pulp (wood, reed, straw, wheat straw, bamboo, sugarcane bagasse, cotton straw, etc.) as raw materials, and are crushed into pulp suspensions with a certain concentration, or a certain amount of chemicals are added according to product requirements. Auxiliaries are then formed on the die by vacuum squeezing in a paper molding machine. The wet paper is then transferred to a drying tunnel by evacuation and blowing of compressed air, and further dried by dehydration. Exquisite sales of packaging paper products also need to carry out hot presses and become clean and tidy products. Specifically, general industrial packaging pulp mouldings use recycled wood fibre raw materials (waste bins, cartons, paper trays, honeycomb paperboards, etc.) are more suitable' in the production process do not have to add enhancer, waterproof agent, anti- Oil and other chemical additives. Wood fiber itself has a longer fiber and higher strength, which can meet the requirements of packaging industrial products. Pulp mouldings for food packaging and lunch boxes generally use commercial pulp (wood pulp, straw pulp, eucalyptus pulp, etc.), and certain chemical additives such as water repellent and oil repellent agent are added during the processing and production process. The product has a certain waterproof and oil resistant performance and meets the relevant hygienic standards.

As a new type of paper printing material, compared with the traditional common paper printing materials (offset paper, coated paper, corrugated cardboard, etc.), the surface of paper molding products is relatively rough, especially for printing pressure and ink when printing. Claim.

2, 2 structural characteristics of paper products

Due to the requirements of compressive, shockproof and impact resistance, paper-type packaging products must have good cushioning properties and generally have geometric shapes that conform to the shape of the packaged products. Therefore, the structure is varied (the shape is convex and concave, and there are more variations.) Among them, the paper printing products have irregular printing surface shapes, curved surfaces, curved surfaces, or flat surfaces that are not in the same direction, and the printing surface is small, which requires a very flexible printing method, and conventional conventional printing processes cannot meet the requirements.

(to be continued)