Knitted fabric based on octagonal hollow fibers

Abstract

The utility model relates to the technical field of knitted fabrics, in particular to a knitted fabric based on octagonal hollow fibers, which is woven by a double-sided circular knitting machine and comprises a pattern formed by weaving an upper dial and a lower needle cylinder, the pattern takes four paths of a specific coil structure as a cycle, the needle density of the lower needle cylinder is 1.5-3 times that of the upper dial, and the needle density of the lower needle cylinder is 1.5-3 times that of the upper dial. The needle density of the upper needle dial is 16-32 needles / inch, the needle density of the lower needle cylinder is 16-44 needles / inch, the fabric comprises a front structure, a back structure and a connecting structure for connecting the front structure and the back structure, at least the fiber raw material of the back structure is octagonal hollow fibers, and the fiber raw material of the front structure is octagonal hollow fibers. According to the design of the fabric structure, the composite functional knitted fabric which has a clear vertical bar mechanism on the surface, is not prone to deformation, stiff and smooth in surface backbone, high in warmth retention rate, light in gram weight, efficient in moisture absorption and sweat releasing, comfortable to wear and the like is obtained.

Description

Technical Field

[0001] This utility model relates to the field of knitted fabric technology, specifically to a knitted fabric based on octagonal hollow fibers. Background Technology

[0002] Knitted fabrics are widely used in underwear and casual outerwear due to their good elasticity and comfort. However, the following technical challenges exist in the field of lightweight, warm knitted fabrics:

[0003] (1) Structural uniformity and functional defects: Conventional warm knitted fleece (such as polar fleece) is usually a single loop or padding structure with a monotonous surface texture (mostly napped or simple texture), lacking crispness and design. Moreover, in pursuit of warmth, the weight or fleece layer thickness is often increased, sacrificing lightweight and moisture-wicking properties.

[0004] (2) The vertical stripe texture cannot be balanced with warmth / moisture wicking: To form a clear and stable vertical stripe texture on a knitted fabric, it is usually necessary to use structures such as rib knitting and jacquard knitting. Ribbed knitting has tight longitudinal loops, which can form vertical stripes, but the structure is relatively dense, which is not conducive to the internal containment of still air (affecting warmth) and may also hinder the longitudinal diffusion of moisture (affecting moisture wicking). The vertical stripes formed by ordinary jacquard knitting have poor structural stability of the raised part, are easy to deform, and have poor coordination with the back pile layer structure.

[0005] (3) Difficulty in achieving lightweight and high warmth retention: The relatively loose knitted structure makes it impossible to achieve the goal of maintaining a high warmth retention rate (≥40%) at a low weight (≤210g / m2).

[0006] Therefore, there is an urgent need for a composite functional knitted fabric that combines multiple properties such as resistance to deformation, a crisp surface, high warmth retention, lightweight, efficient moisture absorption and wicking, and comfortable wear. Utility Model Content

[0007] This utility model aims to provide a knitted fabric based on octagonal hollow fibers. The fabric is woven using a double-sided circular knitting machine. The fabric includes a pattern formed by an upper needle plate and a lower needle cylinder. The pattern is a four-way cycle, with each way consisting of four loops. The patterns formed by the upper needle plate and the lower needle cylinder each consist of two loops. According to the arrangement order from top to bottom from the upper needle plate to the lower needle cylinder, the patterns of the first to fourth ways are as follows:

[0008] The first row of patterns consists of floating lines, forming circles, clustered circles, and floating lines in sequence.

[0009] The second pattern consists of circles, circles, floating lines, and floating lines in sequence.

[0010] The third pattern consists of floating lines, floating lines, circles, and circles.

[0011] The fourth pattern consists of circles, circles, floating lines, and floating lines.

[0012] The needle density of the lower syringe is 1.5-3 times that of the needle density of the upper needle plate. The needle density of the upper needle plate is (16-32) needles / inch, and the needle density of the lower syringe is (16-44) needles / inch.

[0013] The fabric includes a front structure, a back structure, and a connecting structure connecting the front structure and the back structure, wherein at least the fiber raw material of the back structure is octagonal hollow fiber.

[0014] Furthermore, the hollow fiber of the octagonal hollow fiber has a hollowness of 20%-80% and a groove depth of 1-10μm for each filament.

[0015] Furthermore, the fiber raw materials used in the front structure, back structure and connecting structure have a single filament fineness of 20D-150D.

[0016] Furthermore, the cross-section of the hollow cavity of the octagonal hollow fiber monofilament is at least one of circular, elliptical, and quadrilateral shapes.

[0017] Furthermore, the octagonal hollow fiber includes monofilaments with an elliptical cross-section of the hollow cavity and monofilaments with a quadrilateral hollow cavity.

[0018] Furthermore, the mass ratio of the elliptical monofilament in the hollow cavity to the quadrilateral monofilament in the hollow cavity is 1:(0-5).

[0019] Furthermore, the first to fourth patterns form raised strip areas on the front structure of the fabric, and a groove area is formed on the front structure between every four cycles. The raised strip areas and the groove areas are arranged alternately along the longitudinal direction of the front structure. The width ratio of the raised strip areas to the groove areas is (1-6):1, and the height difference between the raised strip areas and the groove areas is 0.1mm-3mm.

[0020] Furthermore, the width ratio of the convex strip region to the groove region is (2-4):1.

[0021] Furthermore, the back structure of the fabric also includes a fleece layer, which is obtained by a napping process. The fleece layer has a pile height of 0.8mm-1.5mm, a pile density of 5000 fibers / cm2-100000 fibers / cm2, and a single filament fineness of 0.3D-1.2D.

[0022] Furthermore, the fibers used in the front structure, back structure, and connecting structure are either DTY or ATY.

[0023] This invention utilizes octagonal hollow fibers as raw material to form a knitted fabric by designing the aforementioned four-way pattern double-sided knitting structure. The specific four-way pattern double-sided knitting structure gives the knitted fabric its external structure, while the octagonal hollow fibers give it an internal cavity structure. The combination of these two structures achieves a composite function of multiple properties, including a clear vertical stripe pattern on the surface, resistance to deformation, a crisp surface, high warmth retention, lightweight, efficient moisture absorption and wicking, and comfortable wear. The weight of the knitted fabric is 210 g / m². 2 The following properties are required: a heat retention rate of ≥40%; a rib height reduction rate of ≤15% in the ribbed area after 5 washes; and a moisture permeability of 8000g / m². 2 For more than 24 hours, the longitudinal wicking height is greater than or equal to 10cm (170mm, 30min).

[0024] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the front structure of the fabric woven according to Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the back structure of the fabric woven according to Embodiment 1 of this utility model;

[0029] Figure 3 This is a triangular configuration diagram of the flower-shaped structure of this utility model;

[0030] Figure 4 This utility model is an octagonal hollow fiber structure with a quadrilateral cross-section for the hollow cavity.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. First row of flower patterns; 2. Second row of flower patterns; 3. Third row of flower patterns; 4. Fourth row of flower patterns;

[0033] A, B: Lower syringe; C, D: Upper needle plate;

[0034] Figure 3 In this context, “-” represents a floating line; “∨” and “∧” represent a loop; and “︹” represents a tangent. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0038] The specific parameters described in this utility model are measured using the following method:

[0039] Surface mechanism stability (protrusion height reduction rate): conforms to GB / T 8629-2017 standard;

[0040] Hollowness ratio of octagonal hollow fiber: determined by buoyancy method;

[0041] Longitudinal wicking height: FZ / T 01071-2008 standard;

[0042] Thermal insulation rate: conforming to GB / T 11048-2018 standard;

[0043] Moisture permeability: conforming to GB / T 12704.1-2009 standard;

[0044] Softness: Subjective tactile evaluation; skin-friendly and non-irritating.

[0045] Appearance: Subjective visual and tactile evaluation: crisp, with clear vertical stripes.

[0046] This utility model provides a knitted fabric based on octagonal hollow yarn. The fabric is woven using a double-sided circular knitting machine. The fabric includes a pattern formed by an upper needle plate and a lower needle cylinder. The pattern is a four-way cycle, with each way consisting of four loops. The pattern formed by the upper needle plate and the lower needle cylinder each has two loops. The patterns of the first to fourth ways, arranged from top to bottom from the upper needle plate to the lower needle cylinder, are as follows: Figure 3 As shown, they are respectively:

[0047] The first row of patterns consists of floating lines, forming circles, clustered circles, and floating lines in sequence.

[0048] The second pattern consists of circles, circles, floating lines, and floating lines in sequence.

[0049] The third pattern consists of floating lines, floating lines, circles, and circles.

[0050] The fourth pattern consists of circles, circles, floating lines, and floating lines.

[0051] The needle density of the lower syringe is 1.5-3 times that of the needle density of the upper needle plate. The needle density of the upper needle plate is (16-32) needles / inch, and the needle density of the lower syringe is (16-44) needles / inch.

[0052] The fabric includes a front structure, a back structure, and a connecting structure connecting the front structure and the back structure, wherein at least the fiber raw material of the back structure is octagonal hollow fiber.

[0053] In this invention, the fiber material of at least the back structure being octagonal hollow fiber includes the following four scenarios: the first scenario is that only the fiber material of the back structure is octagonal hollow fiber; the second scenario is that the fiber materials of both the back structure and the front structure are octagonal hollow fiber; the third scenario is that the fiber materials of both the back structure and the connecting structure are octagonal hollow fiber; and the fourth scenario is that the fiber materials of the back structure, the front structure, and the connecting structure are all octagonal hollow fiber. Among these, the use of octagonal hollow fiber in the back structure is the basis for the fabric to achieve a high warmth retention rate. On this basis, in order to further improve the warmth retention rate, the front structure and / or the connecting structure can also be made of octagonal hollow fiber.

[0054] Furthermore, the fiber raw materials used in the front structure, back structure and connecting structure are at least single strands, and can be double strands, triple strands, quadruple strands, etc.

[0055] Furthermore, both the upper needle plate and the lower needle cylinder include knitting needles, and the needle density described in this utility model is the knitting needle density of the upper needle plate or the knitting needle density of the lower needle cylinder. When the needle density of the upper needle plate is 16 needles / inch, the corresponding needle density of the lower syringe can be 24 needles / inch, 28 needles / inch, 32 needles / inch, 36 needles / inch, 40 needles / inch, or 44 needles / inch; when the needle density of the upper needle plate is 18 needles / inch, the corresponding needle density of the lower syringe can be 28 needles / inch, 32 needles / inch, 36 needles / inch, 40 needles / inch, or 44 needles / inch; when the needle density of the upper needle plate is 20 needles / inch, the corresponding needle density of the lower syringe can be 32 needles / inch, 36 needles / inch, 40 needles / inch, or 44 needles / inch; when the needle density of the upper needle plate is 24 needles / inch, the corresponding needle density of the lower syringe can be 36 needles / inch, 40 needles / inch, or 44 needles / inch; when the needle density of the upper needle plate is 28 needles / inch, the corresponding needle density of the lower syringe can be 44 needles / inch.

[0056] When the needle density of the upper needle plate is 16 needles / inch and the needle density of the lower needle cylinder is 32 needles / inch, the front of the knitted fabric has a clearer vertical stripe pattern, is more crisp and less prone to deformation, and after 5 washes, the reduction rate of the height of the raised stripes in the raised stripe area is further reduced.

[0057] In this invention, the needle density of the lower needle cylinder is 1.5-3 times that of the needle density of the upper needle disc, so that the outline of the vertical stripe structure formed on the front surface of the knitted fabric is clearer.

[0058] Furthermore, the hollow fiber of the octagonal hollow fiber has a hollowness of 20%-80% and a groove depth of 1-10μm for each filament.

[0059] Among them, the design of the above four-way pattern structure and the use of octagonal hollow fibers are important factors in obtaining high-warmth knitted fabrics. In particular, when the hollow rate of the octagonal hollow fibers used is above 30%, the knitted fabric can obtain a higher warmth retention rate.

[0060] Furthermore, the fiber raw materials used in the front structure, back structure and connecting structure have a single filament fineness of 20D-150D.

[0061] Furthermore, the cross-section of the hollow cavity of the octagonal hollow fiber monofilament is at least one of circular, elliptical, and quadrilateral shapes. The quadrilateral shape can be any one of square, rhombus, parallelogram, and trapezoid, and can be a regular quadrilateral or an irregular quadrilateral.

[0062] Furthermore, the eight corners of the octagonal hollow fiber monofilament form a significant radial pattern, with groove structures formed between adjacent corners.

[0063] Furthermore, the octagonal fiber monofilament has a continuous, through-hole cavity, and the structure when the cross-section of the hollow cavity is quadrilateral is as follows: Figure 4 As shown, the cross-section of the octagonal hollow fiber can be a regular octagonal star shape or an irregular curved structure.

[0064] Furthermore, to further improve the warmth retention of the knitted fabric, the octagonal hollow fiber can be a mixture of elliptical and quadrilateral hollow filaments, wherein the mass ratio of the elliptical to the quadrilateral hollow filaments is 1:(0-5).

[0065] Furthermore, the first to fourth patterns form raised strip areas on the front structure of the fabric, and a groove area is formed on the front structure between every four cycles. The raised strip areas and the groove areas are arranged alternately along the longitudinal direction of the front structure. The width ratio of the raised strip areas to the groove areas is (1-6):1, and the height difference between the raised strip areas and the groove areas is 0.1mm-3mm.

[0066] Among them, the raised strip area is as follows Figure 1 As shown, the raised stripe area represents the vertical stripe structure of the knitted fabric.

[0067] The “width” refers to the length along the width. Figure 1 The length in the horizontal direction.

[0068] Furthermore, the width ratio of the convex strip region to the groove region is (2-4):1.

[0069] In this invention, the connecting structure is formed by connecting the needles of the upper needle plate and the lower needle cylinder corresponding to the longitudinal row of the convex strip area in each horizontal row or every other horizontal row by means of looping or forming loops.

[0070] Furthermore, the back structure of the fabric also includes a fleece layer, which is obtained through a napping process. The fleece layer can provide better warmth and skin-friendliness to the knitted fabric. The napping process can be a process commonly used in the art, and is not specifically limited in this utility model, as long as the final knitted fabric with a fleece layer is obtained. The ends of the pile in the fleece layer are rounded.

[0071] In this invention, during the napping process of the knitted fabric, the uniformity, density, and height of the nap are easily controlled. After the napped knitted fabric undergoes antistatic treatment, the back structure is delicate, skin-friendly, and non-irritating. The antistatic treatment can be performed using conventional treatment methods in the art.

[0072] Furthermore, the pile height of the fleece layer is 0.8mm-1.5mm; the pile density is 12,000 fibers / cm2-100,000 fibers / cm2; and the single filament fineness of the pile is 0.3D-1.2D.

[0073] Furthermore, the fibers used in the front structure, back structure, and connecting structure are either DTY or ATY.

[0074] In this invention, the knitted fabric obtained by using the above-mentioned four-way pattern double-sided knitting structure and octagonal hollow fiber as raw material does not obstruct the longitudinal channel of the fabric. The longitudinal core suction height of the knitted fabric is greater than or equal to 10cm (170mm, 30min).

[0075] This invention achieves a composite functional knitted fabric with multiple properties, including a clear vertical stripe surface, resistance to deformation, a crisp surface structure, high warmth retention, lightweight, efficient moisture absorption and wicking, and comfortable wear, by combining the above-mentioned four-way pattern double-sided knitted structure design with octagonal hollow fibers.

[0076] The present invention will be described in detail below through embodiments.

[0077] Example 1

[0078] Raw materials: The front structure uses double-stranded 30D / 36F 100% PET and DTY fibers; the back structure uses single-stranded 94D / 48F 100% PET and octagonal hollow ATY fibers; the connecting structure uses single-stranded 50D / 72F 100% PET and DTY fibers. The hollow rate of the 100% PET octagonal hollow fibers is 20%, the cross-section of the hollow chamber is elliptical, and the groove depth is about 3μm.

[0079] Weaving: A double-sided circular knitting machine is used, with a needle gauge of 16 stitches / inch on the upper needle cylinder and 32 stitches / inch on the lower needle cylinder. Figure 3 The pattern shown is used to obtain the original knitted fabric.

[0080] Ruffing: The original knitted fabric obtained from weaving is subjected to a ruffing treatment. A brush is used to brush the back structure of the original knitted fabric twice and then trim it. The final pile height is 1.0±0.2mm; the pile density is greater than or equal to 13000 roots / cm2.

[0081] Antistatic finishing: 4% (owf) polyether ester (nonionic) permanent antistatic agent (from Milease T Weilai Huinan Group) is used, followed by padding (75% of the residue) - drying (120 degrees Celsius) - baking (155 degrees Celsius, 90 seconds).

[0082] Setting: Using a tenter frame setting machine, the temperature is controlled at 165 degrees Celsius for 50 seconds, with an over-stretching rate of 10%, to stretch the width of the knitted fabric to 145cm, thus obtaining the knitted fabric, as shown. Figure 1 and 2 As shown.

[0083] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0084] Example 2

[0085] Referring to Example 1 above, the difference from Example 1 is that the front structure uses double-stranded 20D / 24F 100% PET and DTY fibers; the back structure uses single-stranded 75D / 36F 100% PET and octagonal hollow ATY fibers; the connecting structure uses single-stranded 20D / 12F 100% PET and DTY fibers; the needle density of the upper needle plate is 16 needles / inch; and the needle density of the lower needle cylinder is 24 needles / inch.

[0086] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0087] Example 3

[0088] Referring to Example 1 above, the difference from Example 1 is that the front structure uses double-stranded 150D / 144F 100% PET and DTY fibers; the back structure uses single-stranded 20D / 12F 100% PET and octagonal hollow ATY fibers; the connecting structure uses single-stranded 150D / 72F 100% PET and DTY fibers; the needle density of the upper needle plate is 16 needles / inch; and the needle density of the lower needle cylinder is 44 needles / inch.

[0089] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0090] Example 4

[0091] Referring to Embodiment 1 above, the difference from Embodiment 1 is that the needle density of the upper needle plate is 28 needles / inch, and the needle density of the lower syringe is 44 needles / inch.

[0092] Example 5

[0093] Referring to Embodiment 1 above, the difference from Embodiment 1 is that the needle density of the upper needle plate is 20 needles / inch, and the needle density of the lower syringe is 32 needles / inch.

[0094] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0095] Comparative Example 1

[0096] Referring to Example 1 above, the difference from Example 1 is that the raw material: hollow fiber monofilament does not contain an octagonal structure, the outer periphery of the monofilament has no grooves, and the cross-section of the hollow fiber has a concentric circle structure.

[0097] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0098] Comparative Example 2

[0099] Referring to the above embodiment 1, the difference from embodiment 1 is that the needle density of the upper needle plate is 16 needles / inch, and the needle density of the lower syringe is 16 needles / inch.

[0100] The obtained knitted fabric was subjected to relevant performance tests, and the results are shown in Table 1 below.

[0101] Table 1

[0102]

[0103] As can be seen from Table 1 above, this utility model, by designing the above-mentioned four-way pattern double-sided knitted structure and using octagonal hollow fiber as raw material, achieves a composite functional knitted fabric with multiple properties such as clear vertical stripe texture on the surface, resistance to deformation, stiff surface structure, high warmth retention, light weight, efficient moisture absorption and perspiration wicking, and comfortable wear.

[0104] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0105] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A knitted fabric based on octagonal hollow fibers, characterized in that, The fabric is woven on a double-sided circular knitting machine. The fabric includes a pattern formed by an upper needle plate and a lower needle cylinder. The pattern consists of four loops per cycle, with each loop consisting of four stitches. The patterns formed by the upper needle plate and the lower needle cylinder each consist of two stitches. The patterns are arranged from top to bottom from the upper needle plate to the lower needle cylinder, with the first to fourth loops being: The first row of patterns consists of floating lines, forming circles, clustered circles, and floating lines in sequence. The second pattern consists of circles, circles, floating lines, and floating lines in sequence. The third pattern consists of floating lines, floating lines, circles, and circles. The fourth pattern consists of circles, circles, floating lines, and floating lines. The needle density of the lower syringe is 1.5-3 times that of the needle density of the upper needle plate. The needle density of the upper needle plate is (16-32) needles / inch, and the needle density of the lower syringe is (16-44) needles / inch. The fabric includes a front structure, a back structure, and a connecting structure connecting the front structure and the back structure, wherein at least the fiber raw material of the back structure is octagonal hollow fiber.

2. The knitted fabric according to claim 1, characterized in that, The hollow fiber has a hollowness of 20%-80% and a groove depth of 1-10μm for each filament.

3. The knitted fabric according to claim 1 or 2, characterized in that, The fiber raw materials used in the front structure, back structure and connecting structure have a single filament fineness of 20D-150D.

4. The knitted fabric according to claim 1 or 2, characterized in that, The hollow cavity cross-section of the octagonal hollow fiber monofilament is at least one of circular, elliptical, and quadrilateral.

5. The knitted fabric according to claim 4, characterized in that, The octagonal hollow fiber includes monofilaments with an elliptical cross-section of the hollow cavity and monofilaments with a quadrilateral hollow cavity.

6. The knitted fabric according to claim 5, characterized in that, The mass ratio of the elliptical-shaped monofilament to the quadrilateral-shaped monofilament in the hollow cavity is 1:(0-5).

7. The knitted fabric according to claim 1, characterized in that, The first to fourth patterns form raised strip areas on the front structure of the fabric, and a groove area is formed on the front structure between every four cycles. The raised strip areas and the groove areas are arranged alternately along the longitudinal direction of the front structure. The width ratio of the raised strip areas to the groove areas is (1-6):1, and the height difference between the raised strip areas and the groove areas is 0.1mm-3mm.

8. The knitted fabric according to claim 7, characterized in that, The width ratio of the raised strip area to the groove area is (2-4):

1.

9. The knitted fabric according to claim 1, characterized in that, The back structure of the fabric also includes a fleece layer, which is obtained through a napping process. The fleece layer has a pile height of 0.8mm-1.5mm and a pile density of 5000 fibers / cm². 2 -100,000 roots / cm 2 The fineness of the single filament of the fluff is 0.3D-1.2D.

10. The knitted fabric according to claim 1, characterized in that, The front structure, back structure, and connecting structure are made of either DTY or ATY fibers.

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