Development prospects and physical properties of polyester canvas.edited

Polyester fiber, commonly known as "polyester". It is a synthetic fiber obtained by spinning polyester obtained by polycondensation of organic dibasic acid and dibasic alcohol, which belongs to polymer compounds. Invented in 1941, it is currently the largest variety of synthetic fibers. The biggest advantage of the polyester canvas is that it has good wrinkle resistance and shape retention, and has high strength and elastic recovery ability. It is strong and durable, anti-wrinkle and non-ironing, and non-sticky.

Here is the content list:

• The development prospect of polyester canvas

• Physical properties of polyester

The development prospect of polyester canvas

Polyester canvas has a series of excellent properties, such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting effect, good heat resistance, and light resistance. The melting point of polyester fiber is about 255°C, and the glass transition temperature is about 70°C. Shape stable under a wide range of end-use conditions, the fabric is washable and wearable. In addition, it also has excellent resistance (such as resistance to organic solvents, soaps, detergents, bleaches, and oxidants) and good corrosion resistance, and is stable to weak acids and alkalis, so it has a wide range of food and industrial uses. The rapid development of the petroleum industry has also provided more abundant and cheap raw materials for the production of printing polyester canvas. In addition, the development of technologies such as chemical engineering, machinery, and electronic self-control technology in recent years has gradually realized short-range processes such as raw material production, fiber forming, and processing. , continuous, automated and high-speed, polyester fiber has become the fastest-growing and highest-output synthetic fiber variety. In 2010, the global polyester fiber output reached 37.3 million tons, accounting for 74% of the world's total synthetic fibers.

Physical properties of polyester

① Color. Polyester is generally milky white with mercerization. To produce dull polyester canvas, it is necessary to add matting agent TiO2 before spinning. To produce pure white products, it is necessary to add a whitening agent. To produce colored polyester canvas, it is necessary to add pigments or dyes to the spinning melt.

② Surface and cross-sectional shape. Regular polyester has a smooth surface and a nearly circular cross-section. If special-shaped spinnerets are used, fibers with special cross-section shapes can be made, such as triangular, Y-shaped, hollow, and other special-shaped cross-section filaments.

③ Density. When polyester is completely amorphous, its density is 1.333g/cm3. When fully crystallized, it is 1.455g/cm3. Generally, polyester has a high degree of crystallinity, and its density is 1.38~1.40g/cm3, which is similar to wool (1.32g/cm3).

④Moisture regain. Under standard conditions, the moisture regains from polyester is 0.4%, which is lower than that of acrylic (1%~2%) and nylon (4%). The hygroscopicity of polyester is low, so its wet strength decreases less, and the fabric has good washability and wearability.

⑤Thermal performance. The softening point T of polyester is 230-240°C, the melting point Tm is 255-265°C, and the decomposition point T is about 300°C. Polyester can burn in fire, curl up, and melt into beads, with black smoke and fragrance.

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