1、 Principle and characteristics of non-woven bag making machine

The non-woven bag making machine is a feeding machine that delivers powder (colloid or liquid) to the hopper above the packaging machine in real time. The introduction speed is controlled by the photoelectric positioning device. The rolled sealing paper (or other packaging materials) is driven by the guide roller to be introduced into the lapel forming machine. After being bent, it is overlapped by the longitudinal sealing machine to form a cylindrical shape. The material is automatically measured and filled into the made bag. The transverse sealing machine intermittently pulls the bag cylinder downwards while performing heat sealing cutting, and finally forms a flat bag with overlapping longitudinal seams and three side sealing, completing the sealing of a bag.

2、 Classification of non-woven bags

Classification of non-woven bags by purpose:

1. Advertising type advertising bag

Non woven bag making machine

Shopping bag advertising can utilize the limited area of the bag body to spread market information about businesses or product services to the world. When customers carry shopping bags with store advertisements and walk through the streets and alleys, they are actually some exquisite advertising bags, no less than making an excellent advertising sign, but the cost is relatively low.

2. Knowledge based advertising bags

It is printing various patterns and texts with certain knowledge, such as world-renowned paintings and Chinese calligraphy, on shopping bags. This type of shopping bag not only provides convenience for consumers when carrying items, but also cultivates people's sentiments and creates wonderful psychological feelings.

3. Gift type advertising bag

China is a country of etiquette. During festivals and celebrations, people always bring gifts to "walk around" to connect emotions and enhance the atmosphere. When guests put gifts in shopping bags with words such as "Wishing you longevity" and "Wishing you happiness," the host feels not only the gift, but also a sense of interest in their heart.

4. Commemorative advertising bag

Such as XX Art Festival commemoration, tourism commemorative bags, etc. This strategy caters to people's commemorative and honor psychology, allowing them to have a new feeling after shopping.

5. Simple advertising bag

When customers purchase miscellaneous items and need to put them in a simple shopping bag, if the store can provide one to relieve their worries, it will definitely be welcomed by consumers. Providing convenience is itself an important key to promotion.

6. Time oriented advertising bags

People generally pursue a high standard lifestyle, and fashionable products lead the trend of consumption. When there is a trend in society, printing product designs and promotional information on beautiful shopping bags is undoubtedly an important promotion tactic. When consumers see hot products available in a certain store, they also have an irresistible temptation.

7. Antique style advertising bag

Many traditional products with high social awareness are highly favored by consumers due to their exquisite materials, old-fashioned craftsmanship, and long history. If the shopping bag is printed with simple and elegant patterns and text, giving people a sense of nobility and solemnity, it is likely to also arouse the shopping interest of some consumers.

According to different production processes, it can be divided into:

1. Spinning: It is the process of spraying high-pressure fine water onto one or more layers of fiber mesh, causing the fibers to intertwine and strengthen the mesh to a certain degree of strength.

2. Heat sealed non-woven fabric bag: refers to adding fibrous or powdered hot melt adhesive reinforcement material to the fiber mesh, and then heating, melting, and cooling the fiber mesh to reinforce it into a cloth.

3. Pulp airflow net non-woven fabric bag: also known as dust-free paper or dry papermaking non-woven fabric. It uses air flow mesh technology to loosen the wood pulp fiberboard into a single fiber state, and then uses air flow method to aggregate the fibers on the mesh curtain, and the fiber mesh is reinforced into a cloth.

4. Wet non-woven fabric bag: It is a process of loosening fiber raw materials placed in a water medium into single fibers, and mixing different fiber raw materials to form a fiber suspension slurry. The suspension slurry is transported to a web forming mechanism, and the fibers are then reinforced into a cloth in a wet state.

Bag making machine

5. Spin bonded non-woven fabric bag: It is a process where the polymer has been extruded and stretched to form a continuous filament, which is then laid into a web. The web is then self bonded, thermally bonded, chemically bonded, or mechanically reinforced to transform into non-woven fabric. 6. Melt blown non-woven fabric bag: Its process includes polymer feeding - melt extrusion - fiber formation - fiber cooling - mesh formation - reinforcement into fabric.

7. Acupuncture: It is a type of dry non-woven fabric that uses the puncture effect of a needle to reinforce a fluffy fiber mesh into a fabric.

8. Stitching: It is a type of dry process non-woven fabric that uses a warp knitted coil structure to reinforce fiber webs, yarn layers, non-woven materials (such as plastic sheets, plastic thin metal foils, etc.) or their combinations to make non-woven fabrics.

According to different product uses, it can be divided into:

1. Non woven bag series: Non woven environmentally friendly bags, Non woven tote bags, Non woven shopping bags, etc.

2. Non woven bag series: Non woven file bags, environmentally friendly shopping bags, packaging bags, Non woven tote bags.

3. Non woven fabric product series: non-woven storage box, non-woven storage box, non-woven suit set - non-woven suit set.

4. Jewelry bags series: gift bags, rope bags, jewelry bags, velvet bags, perfume bags, pen bags, jewelry bags, etc.

5. Apron series: advertising apron, polyester apron, all cotton apron, PVC apron, hanging mesh apron.

3、 The production process of non-woven fabric bags

Non woven bags generally use screen printing technology, also known as "screen printing", which has always been a commonly used printing process by many manufacturers. Generally, it is printed manually, so color control in the process is difficult to control. Therefore, many new non-woven fabric printing methods have emerged. Here, we introduce several mainstream methods in the market:

But with the increasing demand for exquisite product printing and environmental protection from customers, many new non-woven fabric printing methods have emerged. Here, we introduce several mainstream methods in the market:

1、 Watermark

It is named after its use of water-based elastic adhesive as a printing medium and is commonly used in textile printing, also known as printing. Mix the color paste with water-based elastic glue during printing. When developing the printing plate, chemical solvents are not used and can be directly rinsed with water. Its characteristics are good coloring power, strong covering and fastness, water resistance, and basically no odor.

2、 Gravure printing

Triple edge sealing bag making machine

The finished product processed by this method is usually called a laminating non-woven fabric bag. This process is divided into two steps: first, traditional gravure printing technology is used to print the graphics and text onto a thin film, and then the film with the printed pattern is laminated onto non-woven fabric using a laminating process. This process is commonly used for non-woven bags with large-area color pattern printing. Its characteristic is exquisite printing, the entire process is produced by machines, and the production cycle is short. In addition, the product has good waterproof performance and the durability of the finished product is better than that of non-woven bags produced by other processes. There are two options for thin films: glossy and matte, with matte having a matte effect! The disadvantage is that it conflicts with environmental protection concepts, as the film is difficult to degrade.

3、 Heat transfer printing

Heat transfer printing belongs to special printing in printing! This method requires an intermediate medium, which is to first print the image and text onto a heat transfer film or paper, and then transfer the pattern onto non-woven fabric by heating the transfer equipment. The commonly used medium in textile printing is heat transfer film. Its advantages are: exquisite printing, rich layering, and comparable to photos. Suitable for small area color image printing. The disadvantage is that the price is high and the printing cost is high.