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What is the difference between RPET fabric and ordinary polyester fabric?

Date:Jan 10, 2021

The difference between RPET fabric and ordinary polyester fabric is simply the source of fabric yarn.

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RPET fabric


RPET fabric is a new type of environmentally friendly recycled fabric, called Recycled PET Fabric in English, also known as recycled PET fabric. The yarn is extracted from recycled mineral water bottles and Coke bottles, also commonly known as Coke bottle environmental protection cloth.


Because it is a new type of green renewable environmental protection fabric, its low-carbon source has made a great contribution to conserving petroleum resources and protecting the ecological environment. Therefore, it is very popular in foreign countries, especially in developed countries in Europe and America. It is widely used in camisole, shirt, skirt, children's clothing, silk scarf, cheongsam, tie, handkerchief, home textile, curtains, pajamas, bows, gift bags, sleeves, fashionable umbrellas, Pillowcases, pillows, etc.


Picture Ordinary polyester fabric


As we all know, the yarn of ordinary polyester fabric is made from petroleum


Ordinary polyester fabric: it is ordinary polyester (POLY), its chemical name is polyethylene terephthalate (PET), its tensile breaking strength and tensile breaking elongation are higher than cotton fiber, and it has a good Heat resistance and thermal stability. Because of its many excellent properties, it is widely used in clothing, home textiles, decoration, and industrial products. Its rapid development speed and high output are known as the "Crown of Chemical Fibers."


Picture The difference between recycled polyester and ordinary polyester


Different performance


1. The strength and other properties of recycled polyester fiber are poor.

2. The strength and other properties of polyester fiber are relatively good.


Different raw materials


1. Recycled polyester is re-granulated with recycled materials (PET bottle flakes, foam materials, etc.), and then drawn into fibers.

2. Polyester is made of chemical raw materials PTA and MEG by polymerization and esterification drawing into fiber.


Polyester yarn refers to the yarn spun from polyester. Polyester is a type of polymer fiber made by spinning. At present, it mostly refers to the fiber produced with ethylene phthalate as the raw material. The abbreviation of the English name "polyethylene terephthalate", referred to as "PET" fiber. It is commonly called polyester in our country.


Recycled polyester staple fiber uses polyester fabric, waste polyester bottle flakes, spinning waste silk, foam material, pulp block as raw materials. The waste bottle flakes are crushed and washed, and the mixture of various materials is dried, melted and extruded, Silk, winding, bundling, drawing, crimping, relaxation and heat setting, and cut to form polyester staple fibers of different lengths.

yarn dyeing

In contrast, environmentally friendly polyester not only has the advantages of ordinary polyester, but also tends to be green and environmentally friendly. More suitable for our customers.


Characteristics of polyester


1. High toughness. The short fiber strength is 2.6~5.7cN/dtex, and the high tenacity fiber is 5.6~8.0cN/dtex.


Due to its low hygroscopicity, its wet strength and dry strength are basically the same. The impact resistance is 4 times higher than nylon and 20 times higher than viscose fiber.


2. Good flexibility. The elasticity is close to that of wool, and it can almost completely recover when it stretches 5% to 6%. Wrinkle resistance is better than other fibers, that is, the fabric does not wrinkle and has good dimensional stability. Polyester fabric has high strength and elastic recovery ability, so it is durable, wrinkle-resistant and non-ironing.


3. Heat-resistant polyester is made by melt spinning, and the formed fiber can be heated and melted again, which is a thermoplastic fiber.


The melting point of polyester is relatively high, but the specific heat capacity and thermal conductivity are small, so the heat resistance and thermal insulation of polyester fiber are higher. It is the best among synthetic fibers.


4. Good thermoplasticity, poor melting resistance. Because polyester has a smooth surface and tightly arranged internal molecules, polyester is the most heat-resistant fabric among synthetic fabrics. It is thermoplastic and can be made into pleated skirts with long-lasting pleats.


At the same time, polyester fabrics have poor melting resistance and are prone to forming holes in the presence of soot and sparks. Therefore, try to avoid contact with cigarette butts and sparks when wearing.


5. Good wear resistance. The abrasion resistance is second only to nylon, which is the best in abrasion resistance, and is better than other natural fibers and synthetic fibers.


6. Good light resistance. Lightfastness is second only to acrylic fiber. The light fastness of polyester fabric is better, except that it is worse than acrylic, its light fastness is better than natural fiber fabric. Especially the light fastness behind the glass is very good, almost as good as acrylic.


7. Corrosion resistance. It is resistant to bleaching agents, oxidants, hydrocarbons, ketones, petroleum products and inorganic acids.


It is resistant to dilute alkali, not afraid of mildew, but hot alkali can make it decompose. There is also strong resistance to acids and alkalis, and UV resistance.


8. The dyeability is poor, but the color fastness is good and it is not easy to fade. Because there is no specific dyeing group on the molecular chain of polyester, and the polarity is small, it is difficult to dye, the dyeability is poor, and the dye molecules are not easy to enter the fiber.


9. Poor hygroscopicity, sultry feeling when wearing, and easy to be charged with static electricity and dirt, which affects appearance and comfort.


However, it is very easy to dry after washing, and the wet strength hardly drops, does not deform, and has good wash and wear properties.