FDY

FDY Yarn or Fully Drawn Yarn is a type of fully oriented polyester filament yarn in which drawing and orientation are completed during the production process. Compared with POY yarn, which is mainly used for entering the texturizing stage, FDY has more direct usability in subsequent production processes and can be used as a raw material for producing twisted yarn or in some common weaving processes.

For industrial customers, purchasing FDY yarn should be based on production line specifications and the final product requirements. Yarn count, filament number, quality Grade, color condition, bobbin weight and number of cones are information that should be determined before ordering. In Zigma’s registered available products, FDY counts of 50, 75 and 100 denier with 36 filaments are listed, and its main application is stated as “suitable for twisting”.

Introduction and Applications of FDY Yarn

FDY is a fully oriented polyester yarn. During production, drawing is performed on polyester filaments to create and stabilize the required orientation of the yarn. The result is a smooth and uniform yarn that can enter some subsequent production stages without requiring a texturizing process.

One of the main applications of polyester FDY yarn in Zigma’s product range is use in twisting. FDY can be used as a base yarn for producing twisted yarns. In the technical information of TFO, FDY is also introduced alongside ITY and DTY as one of the yarns on which twisting operations are performed.

It is also mentioned in the product technical specification that untwisted FDY can be used in common weaving processes. Therefore, when selecting this product, it should be determined whether the yarn is purchased for twisting or will be directly used in a weaving process.

This difference in application can affect the selection of count and other technical specifications. Therefore, when purchasing FDY yarn in bulk, the final application should be provided along with the inquiry request.

Technical Specifications and Available FDY Yarn Counts

One of the most important parameters in selecting FDY yarn is yarn count and filament number. In Zigma’s available product list, FDY is registered in counts of 50, 75 and 100 denier with 36 filaments.

For example, product technical specifications include FDY 50/36 and FDY 75/36. For FDY 75/36, strength above 4 g/den, elongation in the range of 30 to 40 percent, circular cross-section, maximum bobbin diameter of 39 cm and maximum bobbin weight of 10 kg are recorded.

The FDY 50/36 technical sheet also includes similar specifications such as count, strength, elongation, CV, diameter and bobbin weight.

The factory technical sheets also mention the capability of producing FDY in a wider range of 50 to 300 denier; however, this range represents production capacity and does not necessarily mean that all counts are available for sale at all times. For ordering counts outside the current list, production possibility and availability should be checked separately.

Regarding yarn appearance, there is a difference between documents: the technical specification mentions production capability of semi-matte and bright white FDY, while the Zigma product approval form records that all currently available yarns for sale are matte. Therefore, the luster type should be confirmed based on current availability when ordering.

Quality Grade and FDY Yarn Selection Conditions

In B2B orders, yarn count is not the only selection criterion. Grade or quality level of FDY yarn should also match customer requirements.

According to Zigma’s approved product information, the following weight Grades are registered for FDY and ITY:

Grade A: Approximately 9 kg per cone and without quantitative or qualitative defects
Grade A-: Approximately 5 to 9 kg, without quality defects but with lower weight
Grade AW: Approximately 300 g to 5 kg, without quality defects and with lower weight

Therefore, when inquiring about FDY yarn price, the required Grade should also be specified, as the product Grade affects bobbin weight and production planning.

Another important factor is color condition. According to technical information, color condition is highly important for yarn products because its purpose is to prevent color variation, shade differences and dark/light lines in the final fabric.

For manufacturers where final product color uniformity is important, color condition and, if required, the same-batch issue should be checked before ordering.

FDY Yarn Packaging and Ordering Conditions

FDY yarn is supplied as bobbin and pallet. According to production process information, FDY and ITY products are packaged as 72-piece pallets, and pallet weight is approximately 600 to 700 kg depending on yarn count.

In product technical specifications, some FDY SKUs have a maximum bobbin weight of 10 kg and pallet weight range of 600 to 750 kg. Therefore, the exact pallet weight may vary according to count, Grade and product specifications and should be confirmed at the time of ordering.

In industrial orders, number of cones is also highly important. Zigma’s technical information emphasizes that the number of cones should match the next production stage, because an unsuitable number of cones compared with machinery requirements may leave part of the product unused or increase waste.

Therefore, when ordering FDY, in addition to the required total weight, the number of cones and the next consumption process should also be specified.

Guide to Selecting the Right FDY Yarn

To select the right FDY yarn, the product application should first be determined. If the yarn is intended for twisting, the required specifications of the twisting stage should be the basis of selection. If FDY is used untwisted in weaving, the product should be selected according to fabric structure and the machine being used.

Before placing an order, the following information should be prepared:

Yarn count and filament number, application, required Grade, color condition, number of cones and approximate order weight.

For example, stating “FDY 75/36” is much more accurate than a general request for “FDY yarn” and allows the available product to be checked faster according to customer requirements.

In comparing FDY and POY, it should be noted that POY is a partially oriented yarn mainly used for texturizing, while FDY undergoes a more complete drawing process and can be used for producing twisted yarn or some weaving processes. Therefore, the choice between POY and FDY should primarily be based on the customer’s production stage, not only the product price.

FDY Yarn Price and Availability Inquiry

FDY yarn price is affected by factors such as count, filament number, Grade, order weight, number of cones and product availability. Therefore, in B2B transactions, price inquiry based on exact product specifications is more useful than providing a general price.

For receiving a suitable offer when purchasing polyester FDY yarn, the following information should be included in the inquiry:

• Yarn count and filament number
• Required Grade
• Color condition if required
• Number of cones or order weight
• Application; such as twisting or weaving

By providing these specifications, availability can be checked and the product can be matched with production line requirements faster.

To check availability, receive technical specifications and inquire about FDY yarn price, send your required specifications through Zigma’s inquiry form.