Knitted sleepwear fabric of pla / ptt composite fibers

Abstract

The utility model relates to textile fabric technical field, concretely relates to a PLA / PTT composite fiber knitted nightwear fabric, adopts PLA / PTT composite fiber as weaving yarn weft knitting as double-sided change plain stitch, the PLA / PTT composite fiber is parallel type composite structure and the whole is the spiral body curling form's elastic fiber. The utility model relies on the natural functionality that fiber material has itself, including excellent natural antibacterial and anti-mite, ultraviolet radiation resistance, moisture diffusivity, soft mercerizing sense, soft skin, elasticity and other wearing characteristics. And overcome the easily degradable poly lactic acid material fabric, reach the comprehensive demand of prolonging fabric usable life.

Description

Technical Field

[0001] This utility model relates to the field of textile fabric technology, specifically to a PLA / PTT composite fiber knitted sleepwear fabric. Background Technology

[0002] Knitted pajamas are a staple of everyday clothing, primarily made from pure cotton, silk, and synthetic blends, using both knitted and woven fabrics. High-end pajamas use silk, while most commonly used pajamas are made from pure cotton or cotton-polyester blends. Furthermore, the softness and skin-friendliness of knitted fabrics are gradually replacing woven fabrics as the main weaving method for pajamas. Currently, pajamas made from the fibers used lack multifunctional properties such as antibacterial, anti-mite, flame-retardant, and UV-resistant properties, hindering the development of consumer demand for multifunctional, health-promoting, and comfortable pajamas.

[0003] To enhance the versatility of knitted pajama fabrics, researchers have developed various chemical-based functional auxiliaries, which are added during the dyeing and finishing process to achieve functionalities such as moisture wicking, antibacterial and anti-mite properties, and UV protection. However, these chemical auxiliaries pose uncertain chemical hazards to the human body, failing to alleviate consumer concerns. Therefore, researchers are seeking a knitted pajama product that can meet consumers' demands for multifunctionality and environmental friendliness by relying on the natural functionalities of the fiber material itself, without the need for chemical additives. Utility Model Content

[0004] The purpose of this invention is to provide a PLA / PTT composite fiber knitted pajama fabric that, without the need for chemical additives, relies on the natural functionalities of the fiber material itself to possess excellent natural antibacterial and anti-mite properties, UV radiation resistance, moisture diffusion, soft silky feel, skin-friendly texture, elasticity, and other wearing characteristics.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: PLA / PTT composite fiber knitted pajama fabric uses PLA / PTT composite fiber as the weft yarn for weaving and is knitted in a double-sided variable plain knit structure. The PLA / PTT composite fiber is an elastic fiber with a parallel composite structure and an overall spiral crimped form.

[0006] Preferably, the double-sided variable plain knit weave is a complete weave cycle with six yarn feeds. The first yarn feed is a single purl weft plain knit weave with a low heel stitch, the second yarn feed is a high heel rib stitch, the third yarn feed is a single purl weft plain knit weave ...

[0007] Preferably, the PLA / PTT composite fiber has a circular cross-section.

[0008] Preferably, the mass ratio of the two components in the PLA / PTT composite fiber is 5:5.

[0009] Preferably, the PLA / PTT composite fiber is FDY filament with a fineness range of 50dex / 24f-120dex / 72f.

[0010] Preferably, the weight of the knitted fabric is 180 g / m². 2 -240g / m 2 The width of the door is 170cm-190cm.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This utility model of knitted pajama fabric uses PLA / PTT composite fibers as yarn for weft knitting. It relies on the inherent natural functionalities of the fiber material, including excellent natural antibacterial and anti-mite properties, UV radiation resistance, moisture diffusion, soft silky feel, skin-friendly texture, and elasticity. It also overcomes the tendency of polylactic acid fabrics to degrade, thus achieving the comprehensive goal of extending the fabric's lifespan.

[0012] The PLA / PTT composite fiber of this invention uses PLA, which stands for Poly-Lactic Acid fiber. PLA fiber is polymerized from lactic acid obtained through the fermentation of corn starch. It is biodegradable, environmentally friendly, and has good biocompatibility and bioabsorbability. PLA fiber has high crystallinity and orientation, high heat resistance and high strength, and is very easy to dye and process. The product is lightweight; it has a wicking effect and good moisture absorption and breathability; the fabric made from it has high strength, good elongation, soft hand feel, good drape, luster and elasticity; it has UV resistance; it has good heat resistance, and is acid-resistant but not alkali-resistant. Utilizing the low natural degradation rate of polyester PTT, its composite spinning with PLA significantly reduces the rate of strength loss caused by natural degradation, effectively ensuring the effective service life of the polylactic acid composite fiber and its fabric. Furthermore, this invention utilizes the high heat shrinkage properties of PTT material and the relatively low heat shrinkage properties of polylactic acid material to produce a spiral curl during the high-temperature hot-melt composite spinning process. This gives the composite fiber FDY filament direct elasticity, with the fiber's wet heat shrinkage rate maintained at 80%-90% and its elastic recovery rate at 92%-98%. This allows the composite fiber fabric to be produced as a medium-elasticity fabric without the use of elastic materials such as spandex. It is suitable for various fashion, casual wear, infant and children's clothing, sporting goods, and hygiene products, and has broad application prospects.

[0013] In addition, the pajama fabric of this utility model adopts a double-sided variable plain knit structure, which has the effect of preventing loops and snags. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the PLA / PTT composite fiber structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the cross-section of the PLA / PTT composite fiber of this utility model.

[0016] Figure 3 This is a complete knitting diagram of the knitted fabric of this utility model. Detailed Implementation

[0017] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0018] This embodiment provides a PLA / PTT composite fiber knitted pajama fabric, which uses 100% PLA / PTT composite fiber 10 as the weaving yarn. The PLA / PTT composite fiber 10 is an FDY filament with a fineness of 83.33 dtex / 48f. It is knitted using a 34# weft circular knitting machine with 36# needles to obtain a double-sided variable plain knit structure. The fabric weight is 210 g / m², and the width is 170 cm. This can prevent the fabric from slipping and unraveling, and enhance the stability of the fabric structure.

[0019] like Figures 1 to 2 As shown, the PLA / PTT composite fiber 10 in this embodiment is a bicomponent composite fiber, with one component being PLA portion 11 and the other component being PTT portion 12, forming an AB parallel composite structure with a circular cross-section. The mass ratio of PLA to PTT on the same cross-section is 5:5. Due to the difference in thermal shrinkage properties between PTT and PLA, the overall fiber exhibits a helical, coiled elasticity. The specifications are 83.33 dtex / 48f FDY filament, with a fiber breaking strength of 2.98 cN / dtex, a fiber breaking elongation of 28.2%, a fiber oil content of 0.87%, a wet heat shrinkage rate of 87.4%, and a fiber elastic recovery rate of 93.6%.

[0020] like Figure 3 As shown, in this embodiment, the double-sided variable plain knit weave is woven in a complete weave cycle with six yarn feeds. The first yarn feed is woven in plain knit weft with a low heel stitch, the second yarn feed is woven in rib stitch with a high heel stitch, the third yarn feed is woven in plain knit weft weft with a low heel stitch, the fourth yarn feed is woven in plain knit weft weft with a high heel stitch, the fifth yarn feed is woven in rib stitch with a low heel stitch, and the sixth yarn feed is woven in plain knit weft weft weft with a high heel stitch.

[0021] The dyeing and finishing process of this knitted fabric is as follows: greige fabric—flat-width water washing and degreasing—entering the dyeing vat—dyeing (disperse dyeing)—water washing—cleaning—reduction cleaning—water washing—exiting the vat—dehydration—pre-drying—softening and shaping finishing—inspection.

[0022] Specifically: the flat-width washing temperature is 80℃ for 25 minutes; the dyeing process uses an airflow cylinder dyeing machine to dye light red, using polylactic acid special disperse dye, with both heating and cooling rates at 1℃ / minute, a dyeing temperature of 105℃, and a dyeing time of 45 minutes; the reduction cleaning uses sodium hydrosulfite at a cleaning temperature of 85℃; the pre-drying temperature is 105℃; the softening finishing process uses 5g / L of hydrophilic softener, an oven temperature of 125℃, and a machine speed of 28m / min; the finished fabric weight is 207g / m², and the width is 172cm.

[0023] Fabric testing results: The actual color fastness of the fabric reached level 4, the dimensional stability (shrinkage rate) was +2% in the longitudinal direction and -1.5% in the transverse direction, the water droplet diffusion time was 0.8 seconds, and the UV radiation resistance UPF value was 50+. All the test values ​​of the indicators met the technical performance requirements of the fabric.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications may be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. PLA / PTT composite fiber knitted pajama fabric, characterized in that: PLA / PTT composite fiber is used as the weft yarn for weaving, forming a double-sided variable plain knit structure. The PLA / PTT composite fiber is an elastic fiber with a parallel composite structure and an overall spiral curl. The double-sided variable plain knit structure has a complete weft cycle with six yarn feeds. The first yarn feed is a single purl weft plain knit with a low heel, the second yarn feed is a high heel rib, the third yarn feed is a single purl weft plain knit with a low heel, the fourth yarn feed is a single purl weft plain knit with a high heel, the fifth yarn feed is a low heel rib, and the sixth yarn feed is a single purl weft plain knit with a high heel.

2. The PLA / PTT composite fiber knitted pajama fabric according to claim 1, characterized in that: The PLA / PTT composite fiber has a circular cross-section.

3. The PLA / PTT composite fiber knitted pajama fabric according to claim 1, characterized in that: The PLA / PTT composite fiber is an FDY filament with a fineness range of 50dex / 24f-120dex / 72f.

4. The PLA / PTT composite fiber knitted pajama fabric according to claim 3, characterized in that: The raw fabric weight of the knitted pajama fabric is 180 g / m². 2 -240g / m 2 The width of the door is 170cm-190cm.

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