Non Woven Bag Machine

Our Factory
Zhejiang Zhengwei Machinery Co., Ltd. was established in 2007 and located in the south Zhejiang coast, the East China Sealt. It is a famous Chinese machinery manufacturing city - Ruian City, Zhejiang Province.

R&D
The company adheres to the design concept of high efficiency and environmental protection, with the mission of reducing white pollution, and is committed to the research and development, production, manufacturing, sales, and service of equipment such as non-woven box bags, plastic 3D bags, new structure paper square bottom bags, and pp 3D bags. In long-term practice, the company has gradually formed a business philosophy with independent research and development, design and manufacturing capabilities as its positioning. So far, the company has more than 100 invention patents and new utility and appearance patents.

Rich Experience
In 2012, the company launched the world's first non-woven box bag making machine; In 2016, the project pp 3D bag making machine research and development was successful in 2022, and successfully developed plastic 3D bag making machine in 2017; In 2023, a new structured paper square bottom bag making machine was launched, After completing the independent research and development of the four major 3D bag production equipment, we have become a professional manufacturer of packaging 3D bag mechanical equipment.

Our Service
The company adheres to the service tenet of "ZWE offer the best service to win the trust of customers", and strives to create a new era in the 3D bag industry. Focusing on the future, consistently, based on innovation, and strives to create a new era in the three-dimensional bag industry.

Design Complexity
The complexity of the design plays an important role in determining the appropriate printing technique. So, you need to choose a printing technique that can accurately reproduce the details and colors of your design.
Printing on non-woven fabric sometimes involves features like intricate patterns, gradients, or small text elements that require high precision and accuracy. In cases like this, you need to consider a printing process like digital printing that can replicate fine details and vibrant colors.
This is because other methods are configured manually, which is prone to human error but the digital printing process is done via the computer. It will display all the intricate parts and immediate corrections can be made.

Print Quality
Print quality is another vital factor to consider. Each of the various printing techniques offers various levels of print quality, resolution, and color vibrancy. Flexographic printing and screen printing are known for their ability to produce high-quality prints, while digital printing is perfect for designs that demand high-definition images, excellent resolution, and precise color matching.
These printing techniques are great for reproducing intricate details and maintaining color accuracy. But, if the design requires special effects like embossing, foil stamping, or raised textures, a technique like heat transfer printing may be more suitable.

Production Volume
The quantity of printed non-woven bags to be produced is another critical factor worth consideration. Techniques like flexographic and screen printing are more efficient for large production runs due to their high-speed capabilities and ability to print on multiple bags simultaneously. They offer the added advantage of being cost-effective.
In contrast, heat transfer printing and digital printing techniques are better suited for smaller or on-demand print runs. They allow for flexibility in printing different designs on each bag, making them perfect for customized or limited-edition productions.

Cost Considerations
Another significant factor to consider is cost. The budget allocated for printing plays a role in executing the desired printing technique. Flexographic and screen printing often offer cost advantages for large volume orders, as the setup costs can be distributed across a higher number of bags. However, for smaller quantities, digital printing and heat transfer techniques are more cost-effective.
It is important to weigh the initial costs, such as setup fees and plate charges, against the per-unit costs of each technique to make an informed decision.

Watermark Printing：It is named because it uses water-based elastic rubber paste as the printing medium, which is more common in textile printing, also called printing. Mix color paste and water-based elastic rubber during printing. No chemical solvent is needed when washing the printing plate, it can be washed directly with water. It is characterized by good coloring power, strong hiding power and fastness, washing resistance, and basically no odor. Generally used for printing: canvas bags, cotton bags.

Gravure Printing: The finished product processed in this way is usually called a laminated non-woven bag. This process is divided into two steps, that is, the traditional gravure printing process is used to print the graphics on the film, and then the laminating process is used to compound the printed film on the non-woven fabric. Generally, nonwoven bags printed with large-area color patterns adopt this process. It is characterized by exquisite printing, machine production throughout, and short production cycle. In addition, the product has excellent waterproof performance, and the durability of the finished product is better than that of non-woven bags produced by other processes. The film is available in two options: bright and matt. Matte has a matte effect!

Thermal Transfer Printing: Thermal transfer is a special printing in printing! This method requires an intermediate medium, that is, first print the image on the thermal transfer film or thermal transfer paper, and then transfer the pattern to the nonwoven fabric by heating the transfer device. The media commonly used in textile printing is thermal transfer film. Its advantages are: exquisite printing, rich sense of layering, comparable to photos. Suitable for small area color image printing.

Screen printing is a technique that involves transferring a design with a stencil onto a flat surface using a mesh screen, ink, and a squeegee. While fabric and paper are the most frequently used surfaces for screen printing, it is also possible to print on materials like wood, metal, plastic, and even glass by using specialized inks. The fundamental process entails creating a stencil on a fine mesh screen and then applying ink (or paint, for artwork and posters) by pushing it through the screen to imprint the design onto the underlying surface.

The process is sometimes referred to as 'silk screening' or 'silk screen printing', and although the actual printing process remains relatively consistent, the method of creating the stencil can vary depending on the materials utilized. Various stenciling techniques include:

Utilizing masking tape or vinyl to cover the desired areas of the screen.

Applying the stencil onto the mesh by using 'screen blockers' like glue or lacquer.

Employing a light-sensitive emulsion to produce a stencil, which is then developed in a similar manner to developing a photograph. 

The whole machine of non woven bag screen printing machine is controlled by full touch screen, so the touch screen is easy to be damaged, so it is strictly prohibited to be hit or scratched by hard objects and sharp tools. The user shall wipe and oil the screen printing machine at least once a week as required;

Regularly check the filter water cup of the non woven bag screen printing machine for water accumulation, discharge the water once per shift, avoid bringing the water into the cylinder, and regularly add lubricating oil to each lubricating point to ensure the normal operation of the non woven bag screen printing machine equipment;

Before each start-up, it is necessary to know clearly the operation range of the machine, connect the air source and power supply, check the operation of the machine, and put it into production and use only when it operates normally;

Please keep the non woven bag screen printing equipment clean as much as possible. In case of any dirt, please use a soft and clean dry cloth to clean it. If the dirt is difficult to remove, add a little neutral detergent to clean it. It is strictly prohibited to use alcohol or diluent to clean it;

The main part of the equipment shall be disassembled, inspected and adjusted, including motor cleaning, inspection of technical status, replacement of lubricating oil, etc.; some parts meeting the specified wear limit shall be replaced, such as bearing key pin, electrical and pneumatic components, etc.