WO2023022324A1 - Knitting structure of double weave circular knitted fabric having excellent cooling efficiency - Google Patents

Abstract

The present invention relates to a knitting structure of a double weave circular knitted fabric having excellent cooling efficiency, in which a first fabric which is circular knitted with a surface yarn to form protrusions in contact with the skin is formed to be cross-arranged with a second fabric which is circular knitted with a double-sided yarn to form a horizontal reference plane while the first fabric penetrates around the second fabric, and as a groove is formed between the protrusions, a space is formed inside the protrusions so that, when the circular knitted fabric comes into contact with the skin, low-temperature air fills the space of the groove and the protrusions, and heat exchange due to body temperature is minimized, thereby giving coolness.

Description

Knitting structure of double weave circular knitted fabric with excellent cooling efficiency

The present invention relates to a knitting structure of a double weave circular knitted fabric having excellent cooling efficiency, and in particular, a second fabric circularly knitted with a backside yarn to form a horizontal reference plane is circularly knitted with a surface yarn as a core to form a protrusion in contact with the skin. The first fabric penetrates While forming a cross-array while forming a bone between the protrusions, a space is formed inside the protrusions, so that when the circular knitted fabric comes in contact with the skin, low-temperature air is filled in the space between the bones and the protrusions, so that heat exchange by body temperature is minimized, resulting in coolness. It relates to a knitting structure of a double weave circular knitted fabric with excellent cooling efficiency that can feel.

Globally, in the apparel textile industry, with the increase in consumer demand for eco-friendly, highly sensitive, and highly functional clothing, it is changing from functionality to a trend that can express emotional, luxurious and human-friendly aspects, and these characteristics are natural. It has been developed with attention to the high-level properties of fibers.

Cotton, Tencel, ramie, linen, hemp, wool, etc. are mainly used as clothing materials for natural fibers, and are attracting attention as a material choice by consumers because of their excellent natural color and natural feel. Since there are various uses for fiber, a lot of research is being conducted on consumption and new product development.

These natural fibers are selected and used as an important material in the clothing market due to their luxuriousness, elegant color, absorbency, and comfortable feeling when in contact with the skin. As crop conditions fluctuate depending on the influence, we are faced with a reality where demand and supply are unpredictable.

On the other hand, with respect to synthetic fiber materials, various functional yarns such as absorbency superior to cotton fibers, excellent quick-drying properties, antibacterial properties, deodorization properties, and temperature adaptability have been developed as functional aspects that natural fibers cannot express.

In the case of chemical fibers, the ability to develop differentiated synthetic fibers such as microfibers and functional yarns is world-class due to the active transfer of advanced technologies in the 1980s and 1990s and the establishment of its own research institute. Research and development related to this is quite insufficient.

In the case of fancy yarn spun yarn, which is mainly used for products requiring visual sensibility, such as denim, shirts and casual clothes, only slub yarn products with a limited pattern are being developed using special yarn manufacturing facilities imported from abroad, so labor costs are relatively low and spinning It is a situation that is being pushed out of competition with China and developing countries with many facilities, and slub yarns and fancy yarns manufactured with these special yarn facilities have limitations in satisfying consumers' emotions by expressing only a certain pattern.

Among existing natural fibers, yarns such as cotton, tencel, and modal are used to produce and sell single-ply yarn-oriented products using ring spinning machines and MVS spinning machines. However, in the case of the existing spun yarn, the slub pattern was composed of changes in slub and pitch, and was composed in a monotonous form. In the past, a single pattern of slub has been gradually developed into a multi-slub of several times, and recently, a reverse slub pattern has been gradually developed.

In addition, in order to improve the thermal properties of the fiber, it can be repeatedly thermally cycled by containing a combination of phase change material or plastic crystalline material, and it can store and release a sufficient amount of heat to have improved thermal properties for a considerable period of time. Although temperature-adaptive fibers have been developed and used, when used in circular knitted fabrics, physical properties are insufficient and it is difficult to show handfeel having the sensibility of natural fibers.

In the present invention, the first fabric is circularly knitted with the surface yarn around the second fabric that is circularly knitted with the backside yarn to form the reference plane horizontally and forms the protrusion in contact with the skin. During formation, a space is formed inside the protrusion, and when the circular knitted fabric contacts the skin, low-temperature air is filled in the space between the bone and the protrusion, so that heat exchange by body temperature is minimized and the knitting structure of the double-weave circular knitted fabric has excellent cooling efficiency to feel cool. Its solution is to provide a

The knitting structure of the double weave circular knitted fabric having excellent cooling efficiency of the present invention that solves the above problems is to prepare the surface yarn 14 and the back yarn 16 and then circularly knit with a double-sided circular knitting machine, which is circularly knitted with the surface yarn 14 A first fabric 60 forming protrusions 10, 20, 10a, and 20a in contact with the skin, and a second fabric 70 that is circularly knitted with a back yarn 16 to form a horizontal reference surface, A protrusion 10 is formed on the upper surface of the second fabric 70 as a center, and the surface yarn 14 extending from the end of the protrusion 10 passes over to the lower surface and contacts the second fabric 70 to form a connection line 12 While forming, a protrusion 10a having the same width and height as the protrusion 10 is formed on the lower surface by penetrating the second fabric 70, and the surface yarn 14 extending from the end of the protrusion 10a is directed toward the upper surface. Surface yarn 14 extending from the end of the protrusion 20 by penetrating the second fabric 70 to form a protrusion 20 on the upper surface while passing through the second fabric 70 while forming a joint line 12 in contact with the second fabric 70 The protrusions 20a, such as the protrusions 20, are formed at regular intervals on the lower surface through the second fabric 70, but between the protrusions 10 and 20 on the upper surface of the second fabric 70 and the second fabric ( 70) Between the projections 10a and 20a on the lower surface, a valley 30 is formed, and a space 40 is formed inside the projections 10 and 20 and the projections 10a and 20a. Cooling efficiency characterized in that when the circular knitted fabric comes into contact with the skin, the space 40 of the valley 30 and the protrusions 10, 20, 10a, and 20a is filled with low-temperature air to feel cool It is to provide a knitting structure of this excellent double weave circular knitted fabric.

Another solution of the present invention is to prepare the surface yarn 14 and the back yarn 16 and then circularly knit with a double-sided circular knitting machine. The first fabric 60 to form, the second fabric 70 that is circularly knitted with the back yarn 16 to form a reference plane horizontally, and the protrusions 10 and 20 are on one side of the second fabric 70 Protrusions 10 having a certain width and height are formed at regular intervals, and the back yarn 16 forming the second fabric 70 at the valley 30 penetrates the first fabric 60 to form a loop 30a is formed, the first fabric 60 and the second fabric 70 are combined by the loop 30a, and a space is formed inside the protrusion 10, so that when the circular knitted fabric contacts the skin, the bone 30 and the protrusion (10) (20) To provide a double-weave circular knitted structure with excellent cooling efficiency, characterized in that the space 40 is filled with low-temperature air so that a cool feeling can be felt.

As such, the present invention is formed such that the first fabric forming the projections in contact with the skin is circularly knitted with surface yarns around the second fabric forming the reference plane horizontally and cross-arranged while penetrating, forming a valley between the projections and the projections. A space is formed inside the protrusion, so when the circular knitted fabric comes in contact with the skin, low-temperature air is filled in the space between the bone and the protrusion, thereby minimizing heat exchange by body temperature. It is a useful invention.

1 is a photograph showing the structure of a double weave circular knitted fabric according to the present invention.

Figure 2 is a cross-sectional example showing a cross-section of a double weave circular knitted fabric according to the present invention.

Figure 3 is a photograph showing the structure of another embodiment of the double weave circular knitted fabric according to the present invention.

Figure 4a is a thermal image showing the temperature of the surface of the double weave circular knitted fabric of Figure 3;

Figure 4b is a thermal image showing the body temperature of a human hand.

Figure 4c is a thermal image showing the temperature change of the surface of the double weave circular knitted fabric when it is placed on the double weave circular knitted fabric by hand for a certain period of time and then removed.

Figure 4d is a thermal image showing the temperature change of the hand when the double weave circular knitted fabric was raised and removed for a certain period of time.

5 is a fiber structure diagram of a double weave circular knitted fabric according to the present invention having the structure of FIG. 2;

Figure 6a is a cross-sectional example showing another cross-section of the double weave circular knitted fabric according to the present invention.

Figures 6b to 6c is a fiber structure diagram of the double weave circular knitted fabric according to the present invention to have a cross section of Figure 6a.

Figure 7a is a cross-sectional example showing another cross-section of the double weave circular knitted fabric according to the present invention.

7b to 7c are fiber structure diagrams of the double weave circular knitted fabric according to the present invention to have a cross section of FIG. 7a.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a photograph showing the appearance of a double weave circular knitted fabric according to the present invention, and FIG. 2 shows a cross-sectional view of a double weave circular knitted fabric according to the present invention.

Referring to the knitting structure of the double weave circular knitted fabric having excellent cooling efficiency according to the present invention with reference to FIG. A first fabric 60 that is circularly knitted to form protrusions 10, 20, 10a, and 20a in contact with the skin, and a second fabric 70 that is circularly knitted with back yarn 16 to form a horizontal reference plane And, the protrusion 10 is formed on the upper surface centering on the second fabric 70, and the surface yarn 14 extending from the end of the protrusion 10 passes to the lower surface and contacts the second fabric 70, While forming (12), a protrusion (10a) having the same constant width and height as the protrusion (10) is formed on the lower surface through the second fabric (70), and the surface yarn (14) extending from the end of the protrusion (10a) While going over to the upper surface, it contacts the second fabric 70 to form a joint line 12 while penetrating the second fabric 70 to form a protrusion 20 on the upper surface, and the surface yarn extending from the end of the protrusion 20 (14) penetrates the second fabric 70 to form protrusions 20a, such as the protrusions 20, at regular intervals on the lower surface, but between the protrusions 10 and 20 on the upper surface of the second fabric 70 and the first Between the protrusions 10a and 20a on the lower surface of the two fabrics 70, a structure is formed in which a valley 30 is formed, and the protrusions 10 and 20 and the protrusions 10a and 20a have a space 40 inside. ) is formed so that the low-temperature air is filled in the valley 30 and the space 40 of the protrusions 10, 20, 10a, and 20a when the circular knitted fabric is in contact with the skin to feel cool.

At this time, as shown in FIG. 2, the first fabric 60 is knitted with the surface yarn 14, and the protrusions 10, 20, and 10a contacting the skin while passing through the second fabric 70 crosswise. (20a) is formed, but the projections 10 and 20 are formed on the upper surface of the second fabric 70 in the drawing, and the valley 30 is formed on the lower surface of the opposite side of the projections 10 and 20, and the second fabric ( 70), when the protrusions 10a and 20a are formed on the lower surface, the upper surface has a structure in which a valley 30 is formed, and a space 40 is formed inside the protrusions 10, 20, 10a, and 20a, The cooling effect can be enhanced by the space part 40 . More specifically, when the circular knitted fabric comes into contact with the skin, low-temperature air is filled in the valleys 30 and the space 40 of the protrusions, so heat exchange by body temperature is minimized, resulting in excellent cooling efficiency for feeling cool.

According to the present invention, the surface yarn and the back yarn are characterized in that different colored yarns are used. The purpose of using the surface yarn and the back yarn to make different colored yarns is to implement a pattern on the first fabric 60 and the second fabric 70, and since there is a pattern, the fabric has back projections 10 and 20 and valleys. (30) is created to maximize air permeability, that is, it has the effect of inducing heat release of the cooling raw material. It can also be expressed in both negative and embossed.

On the other hand, the first fabric 60 made of the surface yarn 14 forms protrusions 10, 20, 10a, and 20a on the upper and lower surfaces with the second fabric 70 as the center, and the back yarn The second fabric 70 made of (16) is knitted horizontally, but an optical illusion as if the valley 30 is formed by the protrusions 10, 20, 10a, and 20a is generated.

At this time, by using colored yarns having different colors, there is an advantage in enhancing the aesthetics of the circular knitted fabric.

According to the present invention, the protrusions 10 and 20 (10a and 20a) are formed obliquely to have a constant inclination angle (θ) with respect to the connection line 12. Preferably, the inclination angle θ is in the range of 30 to 60°. At this time, when the angle is out of the range, it is because the frictional force is increased and you can feel the roughness. Preferably at an angle of 45 °, it is possible to maximize the sharpness of the pattern with less pilling and unfolding due to the characteristics of circular knitting. In addition, even at a different angle, the above problems can be solved by changing the fiber structure.

In the present invention, it is preferable to use hydrophobic synthetic fiber polypropylene draw-twisted yarn, polyethylene draw-twisted yarn, or polyester draw-twisted yarn as the hydrophobic synthetic fiber filament of the back side yarn 16 for absorbing and diffusing moisture from the back side to the surface, and the hydrophobic synthesis Fiber Polypropylene false-twist yarn or polyester false-twist yarn can be used under normal conditions, and in particular, it is more preferable to use Invista's Cool Max for polyester false-twist yarn for absorbing and diffusing moisture by capillarity at the cross section of the yarn do.

At this time, preferably, the front yarn 14 and the back yarn 16 are circularly knitted so that the weight ratio is 50:50 to 60:40.

The surface yarn 14 uses any one selected from the group consisting of 20 to 600 denier polyethylene and 20 to 600 denier polyester, and the back yarn 16 is made of 20 to 600 denier polyethylene yarn. Any one selected from the group consisting of 80 spun yarns is used.

When the surface yarn 14 is used as polyethylene, it has high thermal conductivity and has an effect of absorbing body temperature when in contact with the skin and lowering the body temperature. This is because it can reduce and maximize cooling. In addition, the reason for using polyester customizing is that after filling the filler and implementing the pattern, the product is seriously damaged by the user's use friction and washing friction, so the product is unreliable and uses air interless raw materials for the reason of improving physical properties.

On the other hand, the reason why the back side yarn 16 is used as polyethylene is that heat conduction is possible when in contact with the skin, and it is necessary to maintain breathability such as irregularities in the fabric in a single weave / double weave / triple weave with spun yarn and polyester and other yarns to make polyethylene The absorbed heat is released.

This is because the above single weave is disadvantageous in heat conduction and is easy to heat conduction and heat release in the order of single weave < double weave < triple weave.

Preferred circular knitting conditions of the double-sided circular knitting machine according to the present invention, wherein the double-weave circular knitting fabric is circularly knitted on the double-sided circular knitting machine under conditions of 70 to 100 mm of loop length and 15 to 20 rpm of circular knitting speed and 30 to 38 inches / 16 to 28 gauge conditions. .

" 형상의 무늬를 형성시키킨다.3 is a photograph showing another embodiment of a double weave circular knitted fabric according to the present invention, using rectangles and rhombic squares "

“It forms a pattern of shapes.

More specifically, the protrusions 10, 20 (10a, 20a) on the upper and lower surfaces of the second fabric 70 are regularly arranged spaced apart from each other in the knitting direction in the form of FIG. 3, and the connection line 12 ), the valleys 30 are formed between the protrusions 10 and 20, and the other side surfaces of the protrusions 10 and 20 have a structure in which the valleys 30 are formed. The protrusions 10 and 20 are formed by circular knitting in a structure in which a space 40 is formed therein.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the examples described below are examples for explaining the present invention, and are not intended to limit the present invention to the following examples, and those skilled in the art can be modified as much as possible within the scope described in the claims.

[Example]

Polyethylene yarn is prepared as the surface yarn, and polyester spun yarn is prepared as the back yarn. The prepared surface and back yarns are circularly knitted on a double-sided circular knitting machine under the condition of a loop length of 10 to 25 cm and a circular knitting speed of 15 to 20 rpm and a condition of 30 to 38 inches/16 to 28 gauge to form a first fabric (60) and a second fabric (70 ), and as shown in FIGS. 1 and 2, the protrusions 10 and 20 and the valley 30 are formed on the upper surface around the second fabric 70, and the protrusions 10a and 20a are formed on the lower surface. It is circularly knitted so that the bone 30 is formed. At this time, the protrusions 10, 20, 10a, and 20a are circularly knitted so as to have an inclination angle of 360° in the knitting direction based on the connection line 12.

As described above, three specimens of the double woven circular knitted fabric having the shape of FIG. 3 circularly knitted with a double-sided circular knitting machine were prepared, and the contact cooling temperature and thermal conductivity were tested. The results are shown in Table 1 below.

The heat conduction effect of the double weave circular knitted fabric having the shape of FIG. 3 was measured using a thermal imaging camera. Attached drawing 4a is a photograph of the surface of the fabric before conducting the experiment on thermal conduction, and it can be seen that the surface temperature ranges from 21.0 to 25.0 ° C, and the temperature of the picked part in the photograph is 23.2 ° C.

Meanwhile, FIG. 4B is a thermal image showing the body temperature of a general human hand, and it can be seen that the temperature of the palm at the time of measurement is 36.2 ° C. When the hand with the temperature of 36.2 ° C is attached, the initial surface temperature is 23.2 ° C as shown in FIG. Looking at the temperature change on the surface of the double weave circular knitted fabric when it is placed on the double weave circular knitted fabric representing As can be seen that the transferred hand is cooled to 32.1 ° C. as shown in FIG. 4d of the accompanying drawing, it can be seen that the double weave circular knitted fabric of the present invention has a high heat transfer effect.

5 to 7c are cross-sectional examples and fiber structure diagrams for showing an embodiment of another structure of a double weave circular knitted fabric according to the present invention, which is to be circularly knitted with a double-sided circular knitting machine after preparing the surface yarn 14 and the back yarn 16 , The protrusions 10 and 20 are formed on the upper and lower surfaces of the second fabric 70 as a center, and based on the connection line 12 fixing the first fabric 60 and the second fabric 70 It is formed by mutually crossing each other, and a structure in which a valley 30 is formed between the protrusions 10 and the protrusions 20, and a valley 30 is formed on the opposite surface on which the protrusions 10 are formed. (10) (20) is knitted in a structure in which the space portion 40 is formed therein.

Here, when the valley 30 is to be formed as shown in FIG. 7A, the surface yarn 14 and the back yarn 16 are connected and fixed by the loop 30a to implement the design on the surface. Referring to FIG. 7A in more detail, the surface yarn 14 and the back yarn 16 are prepared and then circularly knitted with a double-sided circular knitting machine. A first fabric 60 forming a, a second fabric 70 that is circularly knitted with the back yarn 16 to form a reference plane horizontally, and the protrusions 10 and 20 are one surface of the second fabric 70 Protrusions 10 and 20 having a certain width and height are formed at regular intervals, and the back yarn 16 forming the second fabric 70 is formed in the valley 30 formed between the protrusions. Loops 30a are formed through the fabric 60, and the first fabric 60 and the second fabric 70 are coupled by the loop 30a, and a space is formed inside the protrusions to form a circular knitted fabric. When contacting the skin of the bone 30 and the space 40 of the protrusions 10 and 20 are filled with low-temperature air, so that the user can feel cool.

As such, the present invention is formed such that the first fabric forming the projections in contact with the skin is circularly knitted with surface yarns around the second fabric forming the reference plane horizontally and cross-arranged while penetrating, forming a valley between the projections and the projections. A space is formed inside the protrusion, so when the circular knitted fabric comes into contact with the skin, low-temperature air is filled in the space between the bone and the protrusion, so that heat exchange by body temperature is minimized, which is a useful invention that has excellent cooling efficiency, such as feeling cool. am.

[Description of code]

10, 20: protrusion

12: connection line

30: Goal

40: space part

60: first fabric

70: 2nd fabric

Claims (2)

After preparing the surface yarn 14 and the back yarn 16, they are circularly knitted with a double-sided circular knitting machine, which is circularly knitted with the surface yarn 14 to form protrusions 10, 20, 10a, 20a in contact with the skin The first fabric 60, the second fabric 70 that is circularly knitted with the back yarn 16 to form a reference plane horizontally, and the protrusion 10 is formed on the upper surface centered on the second fabric 70, and the protrusion ( 10) The surface yarn 14 extending from the end passes through the second fabric 70 while contacting the second fabric 70 to form a joint line 12 while passing to the lower surface, forming a projection such as the protrusion 10 on the lower surface. A protrusion 10a having a certain width and height is formed, and the surface yarn 14 extending from the end of the protrusion 10a comes into contact with the second fabric 70 while passing over the upper surface to form a joint line 12 and The protrusion 20 is formed on the upper surface by penetrating the two fabrics 70, and the surface yarn 14 extending from the end of the protrusion 20 penetrates the second fabric 70 to form a protrusion like the protrusion 20 on the lower surface ( 20a) is formed at regular intervals, but between the projections 10 and 20 on the upper surface of the second fabric 70 and between the projections 10a and 20a on the lower surface of the second fabric 70, valleys 30 are formed. The structure, the projections 10 and 20 and the projections 10a and 20a have a space 40 formed therein, so that when the circular knitted fabric contacts the skin, the valley 30 and the projections 10, 20 ( 10a) A double weave circular knitted structure with excellent cooling efficiency, characterized in that the space portion 40 of (20a) is filled with low-temperature air to feel cool. After preparing the surface yarn 14 and the back yarn 16, it is circularly knitted with a double-sided circular knitting machine, and is circularly knitted with the surface yarn 14 to form protrusions 10 and 20 in contact with the skin. First fabric 60 And, a second fabric 70 that is circularly knitted with the backside yarn 16 to form a reference plane horizontally, and the protrusions 10 and 20 have a certain width and height on one side of the second fabric 70. 10) (20) are formed at regular intervals, and the double-sided yarn 16 forming the second fabric 70 passes through the first fabric 60 in the valley 30 formed between the protrusions to form a loop ( 30a) is formed so that the first fabric 60 and the second fabric 70 are coupled by the loop 30a, and a space is formed inside the protrusions so that when the circular knitted fabric contacts the skin, the bone 30 and the bone 30 A double weave circular knitted knitted structure with excellent cooling feeling, characterized in that the space 40 of the protrusions 10 and 20 is filled with low-temperature air to feel cool.

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