What are the commonly used printing techniques for bag making products in Dalian?

Dalian bag making products, as an indispensable part of modern life and industrial production, have a wide variety of types and are widely used. With the increasing awareness of environmental protection and continuous technological progress, bag making products will develop towards a more environmentally friendly, intelligent, and personalized direction. Enterprises should pay attention to product quality and environmental performance, constantly innovate and optimize designs to meet market demand and enhance competitiveness.

Three sided sealing bag: The bag is sealed on three sides and opened on one side, which is a common type of bag making suitable for packaging various products such as food and daily necessities. Four sided sealing bag: The bag is sealed on all four sides and is usually used to package products with irregular shapes or that require complete sealing, such as powdered or granular products. Self standing bag: The bottom has a special structure that allows the bag to stand on its own shelf, providing a good display effect. It is commonly used for packaging beverages, sauces, pet food, etc.

What are the commonly used printing techniques for bag making products in Dalian?

intaglio printing

Principle: Ink is transferred by carving pits on the plate cylinder. The graphic and textual parts on the plate are lower than the blank part. During printing, ink is filled in the pits and transferred to the substrate through embossing.

Features: High printing quality, bright colors, high saturation, rich layers, able to print very fine patterns and text, and strong printing plate resistance, suitable for large-scale printing, fast printing speed. However, gravure printing has high plate making costs, long cycles, and is not suitable for small batch and multi variety printing needs.

Application: Commonly used for bag making products that require high packaging and printing quality, such as high-end food packaging bags, cosmetics gift box bags, etc.

Flexographic printing

Principle: Using a flexible printing plate with elasticity, the graphic and textual parts on the plate are raised, and the ink is transferred to the plate through a mesh roller, which then transfers the ink to the substrate.

Characteristics: It has the advantages of environmental protection and high efficiency. The ink used in flexographic printing is usually water-based ink or UV ink, which has good environmental performance. Fast printing speed, able to achieve high-speed printing, with low plate material cost and short plate making cycle, suitable for short plate printing and small batch, multi variety production. However, the printing accuracy of flexographic printing is slightly lower than that of gravure printing.

Application: Widely used for printing bag making products of various paper, plastic film and other materials, such as ordinary food packaging bags, daily necessities packaging bags, paper bags, etc.

offset printing

Principle: Using the principle of oil and water immiscibility, the graphic and textual parts on the printing plate are hydrophilic to oil, while the blank parts are hydrophilic. The ink on the printing plate is transferred to the substrate through a rubber blanket.

Features: High printing quality, good color reproduction, able to print clear and delicate images and text. Suitable for printing various fine patterns and continuous tone images, with relatively low printing costs, suitable for medium batch printing. However, when using offset printing on non absorbent materials such as plastic films, the ink adhesion may be poor and pre-treatment is required.

Application: Commonly used for making paper bags, paper boxes, and other bag making products that require certain printing quality, such as gift bags, document bags, etc.

digital printing

Principle: Directly transfer the graphic and textual information from digital files to the substrate through inkjet, laser, and other methods without the need for plate making process.

Features: It has high flexibility and personalization, and can quickly achieve small batch and customized printing. The printing content can be changed at any time according to customer needs, suitable for printing bag making products with variable data, personalized patterns or logos. However, digital printing has a relatively slow printing speed and high cost, making it less economical for large-scale printing.

Application: Widely used in some personalized customized bag making products, such as packaging bags with customer specific identification, name, photo, etc., as well as some small batch sample bags, promotional bags, etc.

Bag making products refer to bags made by processing materials such as plastic, paper, non-woven fabric, etc. into various shapes and uses through specific production processes. This type of product is widely used in various fields such as daily life, industrial production, and commercial packaging. There are various types of bag making products, including plastic bags, paper bags, non-woven bags, composite bags, etc. Each type of bag has its unique characteristics and application scenarios.

Bag making and molding: Various types of bags are formed by cutting, folding, sealing, and other operations of materials according to certain sizes and shapes using a bag making machine. During the bag making process, it is necessary to control parameters such as temperature, pressure, and speed to ensure the quality of the bag. Quality inspection: Conduct inspections on the appearance, size, sealing performance, and other aspects of bag making products, eliminate non-conforming products, and ensure that product quality meets standards.