With the rapid development of weaving technology and the continuous development of new polyester low-elastic yarn products, polyester DTY has been widely used in various fabrics. Many products not only replace higher-priced cotton, linen, wool and other chemical fibers, but also The product style is better, which also puts forward higher requirements for DTY’s quality and production technology. This article discusses the equipment specifications and processes of the FK6-1000 texturing machine based on the requirements of some typical fabrics for polyester DTY.
The specifications and parameters of the FK6-1000 texturing machine are as follows
Processing type: polyester POY; processing range: 30~220 dtex; mechanical speed: up to 1000m/min; friction device: type 8, three-axis disc type, 1-5-1 combination form, soft ceramic introduction disc, PU working disc, disc diameter 52mm , thickness 9mm, gap 0.5mm, S twist; upper hot box: 2m long; lower hot box: 1.46m long; cooling plate: 1.1 m air cooling; number of spindles: 240 spindles; winding: 16-stage stroke system, double Tapered or straight-sided shape, maximum winding stroke 250mm, winding diameter 250mm.
Requirements for DTY filaments in woven fabrics
Typical low-elasticity varieties above 210T “pompanzee” “The characteristics of the cloth surface are: flat silk surface, clear texture, soft luster of the finished product, smooth hand feel, high elasticity, uniform color, etc. The main quality problems that are prone to occur in this type of fabric include: raw material stalls (warp and weft stalls); the density of the designed finished product does not meet the requirements, the fabric has poor hand feel and no elasticity; etc.
This variety is sizing when weaving, and does not require sizing-free yarn. It requires the raw material network to be opened after treatment, with a dye fastness of 4.5 or above, uniform linear density, and an elongation of 20%~ 25%, the boiling shrinkage is 3% to 3.5%; the raw materials have good appearance, high curling bulk and recovery rate, and have enough shrinkage to make the finished product reach the design density and meet the unwinding residual torque (weft) at a warping speed of 500m/min. The wire is a single cylinder, and the unwinding residual torque has little effect).
The key points to adapt to the texturing process of raw materials for such products are: the deformation processing speed is 750~780 m/min; the first heating box temperature H1 is 190~195℃, The temperature H2 of the second heating box is 30-35°C lower than H1; the K value (deformation tension ratio) is adjusted to 0.8-0.9, and the D/Y ratio is appropriately adjusted according to the K value.
This type of finished product has fine crepe lines, soft texture, soft luster, plump hand feel, and good elasticity and drape. The typical variety is Gosbao, which has full elasticity and semi-elasticity. divided. The main quality problems that are prone to occur in this type of fabric are: the finished fabric has poor crepe effect and the particles are not full; the fabric surface has serious ribbing and the width is uneven; the gray fabric does not meet the designed shrinkage rate and the weight does not meet the requirements. , so the weft density has to be increased, which increases the weaving cost.
The product style only has special requirements for weft raw materials: the weaving process requires preparatory processes such as winding, doubling, setting, and rewinding, because the unwinding speed of each process is different. High, no need to add network (superfine denier fiber can be slightly cohesive), dyeing requirement is about 4.0, elongation 25% ~ 30%, boiling water shrinkage 3.5% ~ 4.5%, crimp rate, curl elastic recovery rate And the stability rate is high (withstands the shaping and elastic recovery treatment at 120°C), regardless of the residual torque, ensuring good shrinkage and creping effect of the finished product, and the oiling rate is 3.0% to 3.5%.
The key points to adapt to the texturing process of raw materials for such products are: the deformation processing speed is 760~790 m/min; the temperature H1 of the first heating box is: 195~205℃ , H2 is 35~45℃ lower than H1; the D/Y ratio is as high as possible to increase the false twist twist, and the K value is adjusted to 0.7~0.8; the draw ratio is as small as possible until no stiff yarn is produced.
Line-like fabrics have the dry feel and appearance of linen fabrics. For example, thin imitation linen molike not only has a rough appearance, but is also comfortable to wear and breathable. It has the characteristics of being flat and stiff, not easy to deform, not easy to fluff, and pilling. However, the main quality problems that are prone to occur in imitation linen fabrics are: uneven cloth surface and large shrinkage; the finished fabric has poor stiffness, unstable size and is easy to deform; the cloth surface is shiny, the imitation linen effect is poor, and the air permeability is poor.
The weaving requirements of this type of product are basically the same as those of “crepe de chine” products. The items that need to be adjusted include: elongation rate of 15% to 20%, and boiling water shrinkage rate of 1.5 % ~ 2.5%, with high curl elastic recovery rate and stability rate, ensuring that the finished product is crisp and dimensionally stable.
The key points to adapt to the texturing process of this type of raw materials are: the deformation processing speed is 750~790 m/min; the first heating box temperature H1 is 195~205℃, H2 is 15~20℃ lower than H1; the D/Y ratio is as high as possible to increase the false twist twist, and the K value is adjusted to 0.8~1.0; just stretch to the appropriate elongation.
Sanded and raised fabrics are thin, sanded and raised fabrics woven from polyester DTY microfiber. The surface of the fabric is covered with short, delicate and fine microfibers. Fluff. This type of product has the functions of moisture absorption, breathability, and waterproofing, as well as a silk-like appearance and style. The texture is soft, shiny, and has a smooth and waxy feel.
Typical varieties include “Peach Skin Velvet” and so on. At present, the main quality problems that are prone to occur in this type of fabric are: the finished product has a thin feel, poor wool feel, and the cloth surface is not plump; it is not easy to sand, resulting in high consumption of sand leather, and a high rate of damaged and defective fabrics; a high shrinkage rate and a wide width of the finished product Doesn’t meet the requirements.
The raw material requirements for this type of product mainly include: the dyeing requirement is about 4.0, because it is generally weft-sanded, and the raw material is ultra-fine denier. In order to facilitate the processing between 1500 and 2000m /min high-speed unwinding, all with a network. In order to make the raw material have better fluffiness and facilitate grinding, a pre-network is generally added to the POY between the wire cutter and the first feed roller (the network nozzle aperture is larger than the ordinary one).Add screen.
02 Weft knitted fabric
Plain fabric
Plain fabric The fabric is made of low-elastic polyester yarns of the same fineness or interwoven with low-elasticity yarns of different finenesses. The main quality problems that are prone to occur in this type of fabric are: the finished fabric surface has rungs and is uneven; the finished product has poor resilience and unstable dimensions.
This type of variety is of lower grade, most of which are transfer printing processing. The requirements for raw materials are average. The dyeing requirements are around level 4.0, the elongation is 20% to 25%, and boiling water The shrinkage rate is 3.5% to 4.5%, and the requirements for bulkiness, shrinkage rate, curl elastic recovery rate and stability rate are high. The residual torque is not considered to ensure good shrinkage effect of the finished product.
The key points to adapt to the texturing process of this type of raw materials are: the deformation processing speed is 750~790 m/min; the first heating box temperature H1 is 195~205℃; H2 is 35~45℃ lower than H1; the D/Y ratio is as high as possible to increase the false twist twist, and the K value is adjusted to 0.75~0.85; the draw ratio is as small as possible (until no stiff yarn is produced).
Fleece type
Fleece type weft knitted fabric has a tight and thick body, crisp hand feel, good drape, and a smooth surface The velvet is thick and towering, and is mainly used as winter clothing, children’s clothing fabrics, etc. Typical varieties include “polar fleece” (divided into “single shake” and “double shake”).
The main quality problems that are prone to occur in this kind of fabrics are: the gray cloth surface is uneven and has raw material stalls; the finished cloth surface has poor color and luster and has horizontal rails; it is not easy to nap during post-processing. The finished product is prone to hair loss; when shearing, the hair has to be cut more due to uneven length or too long hair, so the loss rate of the finished product is high.
The requirements for raw materials for this type of product mainly include: when the raw materials are directly put on the machine for weaving, the unwinding speed is not high, and the network degree is not high (ultra-fine denier yarn needs to be added with a light mesh) , the dyeing requirements are above level 4.5, the elongation is 10% to 15%, the boiling water shrinkage is 4.0% to 4.5%, the curling rate, curling elastic recovery rate and stability rate are high, and the residual torque is not considered to ensure the high quality of the finished product. shrink.
The key points to adapt to the texturing process of this type of raw materials are: the deformation processing speed is 750~790m/min; the first heating box temperature H1 is 195~205℃, H2 35~45℃ lower than H1; the D/Y ratio is as high as possible to increase the false twist twist, the K value is adjusted to 0.7~0.8; the draw ratio is adjusted to the appropriate elongation.
Long pile weft knitted fabrics
Long pile weft knitted fabrics have the same requirements as plain fabrics, in which DTY is generally used as the bottom Silk.
Conclusion
The raw materials corresponding to the various fabrics discussed in this article (denier is 50~150D) The performance index requirements and production process conditions are constantly summarized and improved in production practice. Of course, the DTY obtained by processing different POY raw material properties and specifications, texturing equipment and production environment may be different, so there are still some differences in production practice. The process should be tailored around meeting the specific requirements of the product.
Advanced equipment and management help to produce DTY suitable for various weaving requirements. With the development of dyeing and finishing technology and the development and application of new additives, weaving defects Problems will also become easier and easier to overcome and solve. </p
