100% polyester chips
10-260g / ㎡
large square / small square / word pattern / plain weave
2600-3000-3300mm (conventional machine)
It is a kind of non-woven fabric, which is made of countless continuous polyester filaments through spunbonding and hot rolling. Also known as PET spunbond filament non-woven fabric or PES spunbond non-woven fabric, also known as single-component spunbond non-woven fabric. It has high strength, good high temperature resistance (can be used for a long time in 150 ℃ environment), aging resistance, UV resistance, high elongation, good stability and air permeability, corrosion resistance, sound insulation, moth-proof and non-toxic. The highest temperature resistance is 290 ℃, and it is often used in sublimation thermal transfer printing.
First, waterproof.Depending on the gram weight, the water repellency properties of polyester spunbond nonwovens are also different. The larger and thicker the gram weight, the better the water repellency, and the water droplets will slide off the surface directly.
Second, high temperature resistance.Because the melting point of polyester is around 260°C, it can maintain the stability of the non-woven fabric in the environment where temperature resistance is required. It has been widely used in thermal transfer printing, transmission oil filtration, and some composite materials that require high temperature resistance.
For det tredjethe properties of strength resistance, good ventilation, tear resistance and anti-aging are more and more used in various fields, and have become the conventional coating material in the world cable industry . It is a filament non-woven fabric second only to nylon spunbond non-woven fabrics.
Fourth, anti-gamma rays .Applied to medical products, it can be directly sterilized with gamma rays without destroying its physical properties and dimensional stability, which is the physical properties that polypropylene (PP) spunbond non-woven fabrics do not have.
①Hjemmetekstiler:linings, flakes, all kinds of synthetic leather base fabrics and styling cotton. Wall calendars, office document hanging bags, curtains, dust covers, storage bags, etc.;
②Packaging applications :cable wrapping, luggage materials, container bags, composite cement bags, flower wrapping materials, desiccants, adsorbent packaging materials, etc.;
③Home decoration :wall stickers, floor leather base fabrics, flocking base fabrics, bed sheets, bedspreads, tablecloths, etc.;
④Agricultural applications :vegetable, fruit and melon harvest cloth, crop and plant protection covers, soil insulation cloth, greenhouse curtains, Weed protection belt, fruit growing bag, etc.;
⑤Waterproof filtration :base cloth of high-grade breathable (wet) waterproof material such as sbs, APP, filtration of transmission oil, filter membrane of soft foundation treatment drainage board, house wrapping cloth, cushion material , geotextile, etc.;
⑥Industrial application :filter material, insulating material, reinforcement material, support material, composite membrane base cloth;
⑦Medical and health care:disposable sanitary products such as baby and adult diapers, sanitary napkins, gaskets, masks, surgical gowns , disinfection wrapping cloth and other protective equipment;
⑧Automotive interior :automotive tufted carpets and other interior decoration materials.
PET polyester spunbond non-woven fabrics are made of virgin polyester chips through high temperature melt spinning, high speed drawing, cooling and crystallization.
Processed polyester chips—large screw high temperature melt extrusion—filter—metering pump (quantitative conveying)—spinning (spinning inlet up and down stretching and suction)—cooling—air traction—net curtain forming—up and down pressure Roller (pre-reinforcement)—hot rolling (reinforcement) of rolling mill—winding—reverse distribution and slitting—weighing and packaging—finished product storage.
Production Line Technology
The products of the PET spunbond hot-rolled production line are thin and medium-thick hot-rolled non-woven fabrics, generally 15~120g/m and 50~250g/㎡, mainly used in interlining, packaging materials, home textiles, transfer Printing, cable wrapping cloth, floor leather base cloth, car ceiling and carpet base cloth, drainage plate membrane, beach chairs, tents and other leisure products, filter materials, etc.
Small plate tube air drafting technology
For the PET spunbond hot rolling production line using the small-plate tubular air drafting process technology, the domestic line and the imported line are basically at the same level, and even better than the imported line in terms of drafting speed and energy consumption.
However, due to the limitation of domestic raw material level, forging technology and heat treatment technology, the hot roll of the domestic PET spunbond hot rolling mill has poor stability and is prone to thermal deformation, resulting in uneven line pressure, affecting the quality of the fabric and some physical properties. Indicators, the product width is less than 2.4 meters is acceptable, and the problem is more obvious than 2.5 meters, which cannot be compared with the imported Kuster rolling mill with "S" uniform roll technology.
Fordeler:The vertical and horizontal strength ratio of the product is small, generally between 10 and 115, the draft is sufficient, the tensile strength of the cloth surface is high, the heat shrinkage is small, and the fiber monofilament fineness range is large, generally 08~60dpf, Dalian Huayang Company The new HYQLOIII drafting head can meet the drafting requirements of 12dpf PET fibers, so that the products can better meet the requirements of carpet base fabrics and special filter materials.
Ulemper:When producing thin products, the cloud spot phenomenon is more obvious and the uniformity is slightly poor; because the number of transverse spinneret holes is less distributed than the whole plate, the production efficiency is reduced.
Large-slot air drafting process technology
for the whole board For the production line that adopts the large-slot air-flow drafting process technology for the whole board, the current domestic PET spunbond slit drafter and other technologies are not mature enough, but some core equipment or components are introduced. , and other domestic supporting methods for technology and equipment. Not only the investment is significantly lower than the import of the whole set, but also the overall technical level and product quality level are basically the same.
This method will be the best way to build such production lines in the future. Domestic related technologies are in the process of development and will become more and more mature.
Fordeler:The product has less cloud spots, good uniformity, high production efficiency, and is more suitable for thin products.
Ulemper:The vertical and horizontal strength ratio is large, generally more than 15. The range of fiber monofilament fineness is small, generally 06~35dpf. In addition, the domestic slit air drafting device for PET spunbond is not mature enough, and it needs to introduce relatively large investment from abroad.
China's PET spunbond non-woven fabrics started late, starting in the mid-1990s, and due to technical difficulties, expensive imported technical equipment and other factors, the development speed is far behind the PP spunbond method.
In recent years, with the continuous development of my country's economic construction and the need for product structure adjustment, the continuous progress of domestic technology, and the development and expansion of product application fields, polyester spunbond will continue to develop rapidly.
Due to the excellent physical properties of polyester itself, PET spunbond non-woven fabrics have many characteristics, such as high strength, high elongation, low thermal shrinkage, UV resistance, aging resistance, temperature resistance, chemical resistance and corrosion resistance. The fields and applications will continue to expand.
However, regardless of its production capacity or output, the proportion of the total spunbond method in my country is still very small. Compared with developed countries such as the United States, Europe and Japan, it is seriously lagging behind. Therefore, according to the international development trend, the proportion of PET spunbond method should be gradually increased. .
China is a big spunbond country, but not a strong spunbond country. The problems of polyester spunbond industry are mainly reflected in:
1.Some technologies are still relatively backward, and the equipment level and product quality are uneven;
2.Some production lines have low production capacity and high energy consumption
3.The relative lack of high-level technical personnel and other problems;
4.Even the phenomenon of low-level repeated construction has occurred, which must be paid enough attention and vigilance.
To change this situation, it is necessary to intensify the cultivation of talents, improve the technical level of spunbond-related technology and equipment in my country, and adjust the industrial structure to make related technical equipment and products develop in the direction of high efficiency, energy saving, differentiation and function. The inevitable trend of polyester spunbond development.
Compared with PET hot-rolled or needle-punched non-woven fabrics that are carded into a web with short fibers, the spunbond method has the advantages of high technical content, short process, high production efficiency, and less labor. The woven fabrics, especially the tensile strength, tearing strength, bursting strength and other indicators are more than 15 times higher than those of staple fiber non-woven fabrics of the same specification, and the elongation and other indicators are also far better than those of staple fiber non-woven fabrics.
At present, almost all foreign PET staple fiber hot-rolled non-woven fabrics are replaced by PET spunbond hot-rolled non-woven fabrics, and there are not many left in China.