Polyester and spun poly are both synthetic fibers commonly used in the textile industry. While they share similarities, there are some key differences between them.   Polyester is a synthetic fiber that is made from a polymer called polyethylene terephthalate (PET). It is produced through a process called polymerization, where the PET is melted and extruded into fine filaments. These polyester filaments are then combined to create a strong, versatile fiber. Polyester can be further processed to create different types of textiles, including yarns.   Spun poly, on the other hand, refers to polyester fibers that have been spun into yarns. The spinning process involves twisting or spinning the polyester fibers together to form a continuous strand, which is then wound onto a spool or cone. This results in a yarn with a soft, textured appearance. Spun poly has a more natural and cotton-like feel compared to traditional polyester yarns. Differences: Manufacturing process: Polyester is produced through polymerization, while spun poly is created through spinning polyester fibers into yarns. Texture and appearance: Polyester yarns have a smooth and sleek appearance, while spun poly yarns have a more textured and natural look. Feel and drape: Spun poly yarns have a softer and more pliable feel compared to regular polyester yarns, which can feel stiffer. Strength and durability: Since polyester fibers are often used for their strength and durability, spun poly yarns can inherit these qualities, making them suitable for different applications. Applications: Polyester yarns have a wide range of applications, including apparel, home textiles, industrial fabrics, and more. Spun poly yarns, with their softer texture, are often used in garments, soft furnishings, and other textile products where a softer hand feel is desired.   In a few words. polyester is a synthetic fiber while spun poly refers to polyester fibers that have been spun into yarns. The choice between polyester and spun poly yarns depends on the specific requirements of the intended application, including texture, feel, strength, and durability. Get more polyester yarn from https://www.chinaspunyarn.com/.

Air Covered Yarn (ACY) and Spandex Covered Yarn (SCY) are two types of yarn commonly used in the textile industry. While both have the capability to add stretch and elasticity to fabrics, they differ in terms of their construction, properties, and applications.    1. Construction:    - ACY: Air Covered Yarn is a type of yarn where a core yarn is wrapped with a filament yarn using compressed air. The wrapping process creates intermittent loops or bubbles of the filament yarn around the core.    - SCY: Spandex Covered Yarn is a type of yarn where a core yarn is twisted with a spandex filament yarn. The twist allows the spandex yarn to be securely wrapped around the core yarn.   2. Properties:    - ACY: Due to the presence of air bubbles, ACY tends to have a softer and bulkier texture with a lower elasticity compared to SCY. It offers good breathability and moisture management properties.    - SCY: SCY retains the inherent stretch and elasticity of the spandex filament yarn, providing excellent recovery and stretch properties to fabrics. It offers a firm and compact texture with higher elasticity compared to ACY.   3. Applications:    - ACY: Air Covered Yarn is commonly used in applications that require moderate stretch and improved comfort, such as athletic wear, lingerie, socks, and home textiles.    - SCY: Spandex Covered Yarn is primarily used when higher stretch and recovery properties are desired, making it suitable for sportswear, swimwear, waistbands, and medical fabrics.   In summary, the main difference between Air Covered Yarn (ACY) and Spandex Covered Yarn (SCY) lies in their construction method and resulting properties. ACY relies on air bubbles for coverage, providing a softer feel and lower elasticity, while SCY utilizes twisted spandex for enhanced stretch and recovery. The choice between the two depends on specific fabric requirements and desired performance characteristics in different textile applications.