PE bag is a common bag in our daily life, used for all kinds of fruit and vegetable packaging, shopping bags, agricultural products packaging, etc. Making a seemingly simple plastic film bag can be much more complicated. PE bag production process includes plastic particles - heat dissolution mixing - extrusion stretching - electronic treatment -; PE bag is mainly the above several processes, simplified after the three processes: blowing film ------ printing ------ bag making.
PE bag printing process should pay attention to what?
Polyethylene, excellent low temperature resistance (use temperature up to -70 ~-100), chemical stability, most acid and alkali erosion (with oxidizing acid intolerance), insoluble in general solvents at room temperature, low absorption, good electrical insulation performance. However, polyethylene is sensitive to environmental stress (chemical and mechanical action) and poor in heat aging. The properties of polyethylene vary from species to species, mainly depending on molecular structure and density. Products with different densities (0.91-0.96 G/CM3) can be obtained by different production methods. Polyethylene can be processed by ordinary thermoplastic forming methods (see Plastics processing).
What are the notes related to the process in detail below?
Film blowing process should pay attention to the following points:
1. Raw material proportion: according to the various requirements of PE bags, the preparation of different proportions of raw materials. For example: anti-static, anti-rust, mitigation, electrical conductivity, biodegradation and other requirements, add a variety of auxiliary additives for example: to use red, black, color and other colors, add a variety of color caps. According to transparency, toughness, tear strength, vacuum extraction and other requirements, replace a variety of brands or brands of PE materials. For example: according to special requirements, emphasize the requirements of high transparency, strong tearing, good openness, so as to change the proportion of raw materials.
2.the process of blowing film printing, the need for electronic processing, at this time to pay attention to the strength of electronic processing, to ensure that PE drum material electronic processing strength (DAYIN) enough to ensure ink adhesion.
3.in the process of blowing film, according to the special requirements of the film, single opening, double opening, folding, pressure point damage, embossing, expansion and other operations.
PE bag printing process should pay attention to the following matters:
1.printing ink: water-based ink, fast drying ink, invisible ink, color-changing ink, anti-counterfeiting ink, induction ink, conductive ink, low electronic ink, matte ink and other ink characteristics are ink.
2. Printing plate: according to the fine requirements of printing content, gravure (copper plate) printing and flexography (offset) printing are used. These two different printing methods.
3. According to the complexity of the printing content and color complexity, choose the printing method: monochrome printing, monochrome double-sided printing, single-sided color printing, double-sided color printing.
4. According to the special requirements of printing patterns, according to the characteristics of discoloration, anti-counterfeiting, electrical conductivity, adhesives and so on, choose different ink or additives.
Post time: Mar-03-2022
