Paper Cup Printing Technology Discussion (I)

Paper cups have the advantages of good safety and hygienic properties, excellent water resistance, easy processing and shaping during production, and not easily deformed during use. The safety and hygienic nature of the paper cup and the continuous molding processability determine that the paper cup has its own particularities in terms of ink component selection, residual solvent amount, printing process and the like during printing.

In the packaging field, the whole society advocates clean production. It is required that the packaged product should achieve energy conservation and consumption reduction throughout its life cycle. Measures to reduce pollution, increase efficiency, etc. On the other hand, due to the environmental protection awareness, in order to meet the needs of green packaging, it is required that the packaging products be safe and hygienic and have good adaptability to environmental protection. The production and use of paper cups meets the above requirements. Replacing disposable plastic cups with paper cups reduces white contamination. Obviously, paper cups are ideal for replacing plastic containers that are widely used on the market.

Processing form

Paper cups can be processed into cones or cylindrical cups, and can also be processed into other shapes of ice cream cups for use in daily life. Therefore, paper cups have become increasingly popular.

Paper cups can be roughly divided into cold drink cups and hot drink cups depending on usage. The two types of paper cups have different uses and different processing methods. The quality requirements for paper cup materials are also different. In addition to meeting the requirements of its packaging processing performance, the paper cup material must also have a certain printability and the paper cup printing should also meet the conditions of the heat sealing table in the paper cup forming and forming.

1. Hot drink cup

Usually used for hot drinking supplies. The processing of the material is the use of the team's single-sided composite paper, that is, single-sided coated paper. Printing is generally done on the non-PE side and printed directly on the paper. Due to the need for hot drinks. This kind of paper cup needs a certain degree of heat insulation after processing. Therefore, usually this type of product requires the paper to have a certain thickness and stiffness to increase the heat insulation of the paper cup. The larger the volume, the thicker the paper used.

Due to the needs of the dry market, printing on paper cups and cups is a lot of manufacturers use a discretionary publicity. At the same time, the exquisite printing pattern also put a gorgeous coat on the paper cup. Give consumers a good visual enjoyment. Single-lining PE paper is printed on the surface of the paper, so in addition to the selected ink must meet food hygiene requirements. The effect of other paper forces on printing is similar to that of plain paper.

2. Cold drink cup

The cold drink cups are divided into two types according to the processing methods. One is the base paper printing cup making the paper has very good anti-permeability through the process of dipping wax, the other is through the paper double-sided composite PE to make the paper have anti-permeability. . The paper cups of two different processing forms have different printing requirements for their materials. Paper cups processed by wax immersion are printed on paper. There is no special requirement for raw materials for printing. For the double-teamed paper, to obtain a good printing effect, the combined paper must be specially processed to obtain it.

Paper cup material

The production process of cold drink cups; printing directly from paper cup base paper, die-cutting and forming. Surface spray food wax. The production process of the hot drink cup is made from the paper cup base paper and the PE film into a paper cup paper. print. Die-cutting. Processing and forming.

1 composition of paper cup base paper

1) Base paper composition

The main ingredient of paper cup base paper is plant fiber, and its production process is generally using coniferous wood. The pulp made of hardwood and other plant fibers is crushed and refined to join the chemical auxiliary materials. After screening, the paper machine is used to make paper.

(2) Technical requirements

According to the processing performance and use performance of the paper cup, the paper cup base paper must have the following technical requirements.

1 high water resistance

It is required that the paper cups produced by printing be free from water seepage and water leakage, so the paper base paper must have high water resistance.

2 easy processing and forming

When making paper cups. In order to avoid paper jams and wrinkles during the production process, and to prevent deformation of paper cups after molding, the rigidity of the paper base paper must be high and the flatness is good. The density and thickness should be moderate, and it is easy to process and shape.

3 paper surface delicate

When printing paper cups, it is required to control the roughness value of the surface to be printed after the printing surface of the base paper or the coating film PE to meet the printing requirements of the paper cup surface.

4 high whiteness

Without the use of fluorescent agents. The base paper must have considerable paper whiteness to ensure that the printed pattern is clear and vivid.

5 High security

Paper cups are food packaging materials and are in direct contact with the population. They must meet hygienic standards in terms of hygiene. Paper cups and paper cups should be regularly sent to the local national health and epidemic prevention system for health and safety testing. To ensure that users use their own safety. Paper cup base paper must comply with <Food Packaging Hygienic Standards for Food Base Papers> GBl 1 680, paper cup papers must meet the "Hygienic Standards for Polyethylene Products for Food Packaging" CB/T9687, and products (including special plastic particles) must also be sent to relevant agencies for FDA. The quality is tested and qualified, in order to ensure that the paper cup meets the national health standards and meets the requirements of users at home and abroad.
(to be continued)