In recent years, as a new type of material, non-woven fabric has attracted more and more attention. Unlike traditional fabrics, non-woven fabrics do not require the process of weaving or weaving, but are textiles made by chemically, physically or mechanically interweaving, laminating, agglomerating or otherwise making fibers. Non-woven fabrics are light, breathable, waterproof, friction-resistant, chemical-resistant, non-flammable, etc., so they are widely used in medical and health care, household products, clothing, shoes and hats, agriculture, construction and other fields.
Advantage
The surface of the material is smooth | With fine fiber structure and soft surface, it can effectively remove burrs and uneven parts on the surface of abrasive materials, so that the surface can be smoother. |
High Precision | It can be made into grinding sheets of various thicknesses, which can meet the application occasions with different grinding precision requirements, thus making the grinding results more accurate. |
No Dust | Since the non-woven fabric itself is a fiber structure rather than a powder or granular material, no dust will be generated during the grinding process, reducing environmental pollution and injury to workers. |
Life of the material is longer | It has the characteristics of softness and wear resistance, which can reduce the wear and damage of abrasive materials, thereby prolonging its service life. |
Good Air permeability | The physical structure is open, there are many small pores, and the air permeability is good. It is widely used in hygiene products, medical dressings and other fields. |
Good Water Absorption | With good water absorption, it is widely used in medical dressings, sanitary napkins and other fields. |
Good Plasticity | The physical structure is open and the fibers are relatively loose, so it can be shaped by various processing methods, and is widely used in automotive interiors, home decoration, etc. |
Disadvantage
Low strength | .The fiber material is used, and there is no textile structure between the fibers for reinforcement, so its strength is relatively low, which cannot meet some high-strength requirements. |
Poor thermal stability | The molten fiber material used in the manufacturing process has relatively poor thermal stability and is difficult to adapt to high temperature environments. |
Poor anti-aging ability | The chemical fiber material used in the manufacturing process has poor aging resistance and is easily affected by ultraviolet rays and oxidation, resulting in a short service life. |
Difficult to degrade | The physical structure is relatively dense, and it is not easily decomposed by microorganisms, making it difficult to degrade and causing potential pollution to the environment. |
Higher cost | The manufacturing process is relatively complicated, the production cost is high, and the price is relatively high, which is limited by the price in some application fields. |
Preparation technology
1. Melt blowing method
The high molecular polymer or polymer mixture is melted under high temperature conditions, and then the molten material is evenly sprayed onto the rotating drum through the nozzle to form a fiber web, and a non-woven fabric is formed on the drum. This method has the advantages of high production efficiency, simple process, and low equipment investment, and is suitable for the production of nonwoven fabrics with high strength, high torsional stiffness, and high thickness.
2. Wet paper making method
Dissolve the fiber mixture and chemical additives in water, then spread the mixture on the screen through a wet paper machine, and form a fiber network on the screen, and then form a non-woven fabric through drying, compaction and other processes. This method has high production efficiency, uniform fibers, and is suitable for producing non-woven fabrics with fine fibers, low density and high air permeability.
3. Air blowing method
The fiber mixture is blown onto the mesh belt by a high-pressure fan, and then formed into a non-woven fabric through compaction, bonding and other processes. This method has the advantages of high production efficiency, wide application range, and good controllability, and is suitable for the production of non-woven fabrics with low density, high air permeability, and good sound absorption.
4. Dry net making method
The fiber mixture is directly formed on the mesh belt to form a fiber web, and is formed into a non-woven fabric through processes such as compaction and bonding. This method has the advantages of high production efficiency, simple operation, and is suitable for non-woven fabrics with large area and large thickness.
5. Acupuncture
The fiber mixture is fed into the needle punching machine through the feeder, repeatedly punched and compacted by multiple needle punching plates inside the needle punching machine, and the fiber mixture is formed into a non-woven fabric. This method has the advantages of high production efficiency, soft hand feeling, high strength and wear resistance, and is suitable for the production of protective clothing, carpets, filters and other products.
6. Ultrasonic non-woven fabric preparation technology
Ultrasonic vibration is used to control the dispersion and arrangement of fibers, so that the fibers are more closely combined, thereby improving the physical properties and mechanical strength of the non-woven fabric. And there is no need to use harmful chemicals, which is environmentally friendly and meets environmental protection requirements. In addition, ultrasonic non-woven fabric preparation technology can also adjust the frequency and intensity of ultrasonic waves according to different needs and materials to achieve the best preparation effect.
7. Microwave non-woven fabric preparation technology
The principle is to use the high-frequency vibration of microwaves to make the internal friction of the raw material molecules generate heat, thereby heating to a molten state. It is a non-woven fabric preparation method using microwave heating. Compared with traditional preparation methods, microwave non-woven fabric preparation technology has the advantages of faster heating speed, higher efficiency and better heating uniformity. The uniformity of microwave heating can ensure the quality stability of non-woven fabrics, and the preparation process can be completed without using harmful chemicals, which meets environmental protection requirements.
Application
Industrial | Feature | Apply to |
Grinding | Flexible and adaptable | Metal, glass, ceramic, plastic, etc. |
Medical Hygiene | It has the characteristics of non-toxic, non-irritating, breathable, waterproof and dust proof. | Medical masks, medical surgical gowns, medical sanitary napkins, medical dressings, etc. |
Household Items | Soft, absorbent, waterproof, mildew-proof, etc. | Household fabrics, tableware, towels, mops, cleaning cloths, etc. |
Industry | High strength, breathable, waterproof, dust proof, etc. | Filters, battery separators, sound insulation materials, building waterproof materials, etc. |
Agriculture | Breathable, moisturizing, insect-proof, cold-proof, etc. | Agricultural mulch, seedling bag, fruit bag, gardening mulch, etc. |
Environmental Friendly | Degradable, recyclable, renewable, etc. | Garbage bags, shopping bags, reusable bags, etc. |
Conclusion
Non-woven fabric is a material with wide application prospects. It has excellent physical properties, chemical stability and mechanical strength, which can meet the requirements of materials in different fields. With the continuous development of science and technology, non-woven fabric preparation technology is also constantly improving and innovating, opening up a broader development space for its application. In the future, non-woven materials will be applied in more fields, bringing people a more convenient and comfortable life experience, and at the same time causing a smaller burden on the environment.
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