Characteristics of polyester non-woven fabrics

Polyester non-woven fabrics are made by distributing polyester filaments evenly on the running screen curtain through equipment such as screw extruder and spinneret at a specific temperature and pressure to form a fluffy fiber web, and then A non-woven fabric formed by repeated puncturing by a needling machine. Compared with other types of fabric geotextiles and short fiber geotextiles, polyester non-woven fabrics have the following characteristics:

(1) High tensile strength: Compared with short fiber geotextiles of the same grade, the tensile strength is increased by 63%, the tear resistance is increased by 79%, and the burst resistance is increased by 135%.

(2) Good heat resistance: it has a softening point above 238 °C, the strength does not decrease at 200 °C, and the thermal shrinkage rate does not change below 2 °C.

(3) Excellent creep performance: long-term use strength will not suddenly decrease.

(4) Strong anti-corrosion ability.

(5) Good durability, etc.

Polyester non-woven fabric has good mechanical function, good water permeability, corrosion resistance, anti-aging, isolation, anti-filtration, drainage, protection, stability, reinforcement and other functions, can adapt to uneven base, can resist construction External force damage, small creep, can maintain the original function under long-term load, so it is often used in roof waterproof isolation layer.

The waterproof insulation layer exists between the roof waterproof layer and the rigid protective layer above. The rigid layer on the surface (usually 40mm thick fine stone concrete) will have thermal expansion and contraction deformation. During the construction of other structural layers on the waterproof layer, in order to avoid damaging the waterproof layer, polyester non-woven fabrics are generally designed for proper protection, and the gram weight is generally 200g/㎡.

What is the role of non-woven waterproof membrane?

Adding the carcass material to the waterproof membrane is mainly to increase the tensile strength of the membrane, and secondly, with the carcass "skeleton", the membrane can be made thicker. Modified bitumen waterproofing membranes (SBS waterproofing membranes, APP waterproofing membranes, composite tire waterproofing membranes, self-adhesive waterproofing membranes, etc.), PVC membranes, chlorinated polyethylene membranes, etc. have carcass reinforcement.

The carcass in the SBS waterproof membrane is mainly polyester tires, as well as glass fiber felt carcasses, polyester felt and glass fiber mesh composite tires, and copper tires that prevent plant root puncture. Different carcass materials have different effects on the physical and mechanical properties of the coil. Some carcass materials increase the tensile strength of the coil and also increase the shrinkage and deformation of the coil.

Polyester tire is a kind of better performance in the carcass. Polyester tire is usually polyester non-woven fabric, also called polyester felt, which is made of polyester fiber through a certain production process. Short filament, with acupuncture, embossing and other processes, is divided into different thicknesses according to the gram weight per square meter, such as 300g-400g, etc. Different specifications and varieties have different mechanical properties.

Application of non-woven fabrics

Non-woven fabrics are also called non-woven fabrics, and thicker non-woven fabrics used in water conservancy and municipal engineering are also called geotextiles. Non-woven fabrics can be made of polyester fiber, cotton fiber, polyester fiber, polypropylene fiber, etc. as raw materials. Non-woven fabric is composed of directional or random fibers. It is a new generation of environmentally friendly materials. It is moisture-proof, breathable, flexible, lightweight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low in price, and recyclable. Features such as reuse. For example, polypropylene (pp material) pellets are used as raw materials, and are produced by a continuous one-step method of high temperature melting, spinning, laying, and hot pressing and coiling. It is called cloth because of its appearance and certain properties. Its uses are very extensive.

Medical and sanitary non-woven fabrics: surgical gowns, protective clothing, disinfection wraps, masks, diapers, civilian wipes, wipes, wet face wipes, magic towels, soft towel rolls, beauty products, sanitary napkins, sanitary pads, and Disposable sanitary cloth, etc.

Non-woven fabrics for home decoration: wall coverings, tablecloths, bed sheets, bedspreads, etc.

Non-woven fabrics for clothing: lining, adhesive lining, flakes, shaping cotton, various synthetic leather base fabrics, etc.

Industrial non-woven fabrics; base materials for roofing waterproofing membranes and asphalt shingles, reinforcing materials, polishing materials, filter materials, insulating materials, cement packaging bags, geotextiles, covering cloths, etc.

Agricultural non-woven fabrics: crop protection fabrics, seedling raising fabrics, irrigation fabrics, thermal insulation curtains, etc.

Other non-woven fabrics: space cotton, thermal insulation materials, linoleum, cigarette filters, tea bags, shoe materials, environmentally friendly non-woven bags, agricultural can be used for harvest cloth, greenhouse cloth.

Industry: floppy disk lining, speaker cloth, filter material, sound box sound insulation felt, sealing ring lining, cable cloth, glass fiber reinforced plastic towel, industrial wipe, shockproof liner, insulating material, tape base lining, pipe base lining, ventilation duct, Sharpie cloth.

Packaging: composite cement bag, luggage lining, packaging base lining, quilt, storage bag, mobile jacquard luggage.

Clothing and shoemaking: Garment lining, flakes, toe lining, heel lining, underwear, artificial deerskin, synthetic leather, warm shoe lining, cloth sole lining....etc.