WO2024060388A1

WO2024060388A1 - Knitted fabric capable of transporting liquid water over long distance

Info

Publication number: WO2024060388A1
Application number: PCT/CN2022/132998
Authority: WO
Inventors: 胡军岩; 陈长荣; 何贤德; 王莉萍
Original assignee: 东莞超盈纺织有限公司
Priority date: 2022-09-19
Filing date: 2022-11-18
Publication date: 2024-03-28
Also published as: CN218932475U

Abstract

A knitted fabric capable of transporting liquid water over a long distance comprises a fabric body woven by means of at least two different kinds of yarns, wherein the fabric body comprises a liquid water expansion layer serving as an outer garment surface, and a liquid water relay storage and diffusion layer serving as a skin-contact surface, wherein a double-layer three-dimensional (3D) structure of the fabric body is formed by means of the liquid water expansion layer and the liquid water relay storage and diffusion layer, the liquid water expansion layer is a weft plain stitch or a variable plain stitch structure, the liquid water relay storage and diffusion layer is a terry stitch structure, the liquid water expansion layer and the liquid water relay storage and diffusion layer are woven by means of yarns with different levels of fineness, and the water conductivity of the liquid water expansion layer is greater than the water conductivity of the liquid water relay storage and diffusion layer, such that the liquid water is unidirectionally conducted from the liquid water relay storage and diffusion layer to the liquid water expansion layer. The present invention has the properties of unidirectional moisture conduction, can transport the liquid water over a long distance, and has the properties of lightness and ventilation, and unidirectional moisture conduction and quick drying.

Description

A knitted fabric with the ability to transport liquid water over long distances

Technical field

The present invention relates to the field of textile clothing fabrics, specifically a knitted fabric with the ability to transport liquid water over long distances.

Background technique

As people have higher and higher requirements for the quality of life, the demand for clothing is not only to meet the requirements of covering and aesthetics, but also to pay more attention to the comfort of wearing. Therefore, there are strict requirements for clothing fabrics. At present, some clothing fabrics on the market are usually only breathable and cannot quickly absorb the sweat produced by the human body. They have poor moisture permeability and poor moisture absorption effect. They cannot quickly and effectively dry moisture or sweat on the surface of the fabric. It has poor quick-drying performance and is very uncomfortable to wear, which seriously affects human health.

At present, there are two main ways to make moisture-absorbing and quick-drying fabrics in the industry: one is to make them by padding with water-absorbing finishing agents. For example, patent document CN114351336A discloses a regenerated polyester super-hydrophilic quick-drying knitted fabric and its preparation method. . Recycled polyester super hydrophilic quick-drying knitted fabric, calculated in weight percentage, is made of 42-52% recycled polyester and 48-58% cross-shaped recycled polyester, which is double-sided weft knitted and then padded with a water-absorbent finishing agent; The fineness of the regenerated polyester is 0.3-0.6dpf; the fineness of the cross-shaped regenerated polyester is 2.1-2.8dpf; the dpf is the fineness of each single fiber, and satisfies the following formula: dpf=D/F, where D is Denier, F is the number of single fibers.

The other is to use hydrophilic yarn on the front and water-repellent yarn on the back to weave it into a fabric. For example: Patent document CN214168298U, "A knitted fabric with a moisture-repelling and quick-drying function" discloses a moisture-repelling and quick-drying function. The knitted fabric includes a first coil, a second coil and a free coil, the first coil is a thermally conductive yarn, the second coil is a hydrophilic yarn, the first coil is connected to the second coil, so One end of the free coil is provided on the second coil, and the free coil is a high-count water-repellent coil; several groups of first coils are provided between the two adjacent second coils.

Based on the above-mentioned existing patented fabrics, moisture absorption and quick-drying functions are achieved through post-finishing, yarn selection and other technologies. Moisture-absorbing and quick-drying fabrics that have been finished by post-finishing methods have poor washing resistance and feel hard and dry, which affects their softness and comfort when worn. Because there are few gaps in the plain weave structure, it is not conducive for sweat to contact and spread to the absorbent material on the clothing surface. The existing processing methods of moisture-absorbing and quick-drying fabrics have shortcomings such as a narrow range of suitable fabrics, high production and processing costs, and unsatisfactory moisture-absorbing and quick-drying effects. Therefore, in order to solve the above-mentioned problems in the industry, the moisture conductivity of fabrics affects people's wearing comfort. Studying the moisture conductivity of fabrics is of great significance to the development of moisture-permeable and quick-drying fabrics.

technical problem

In order to solve the above technical problems, the present invention provides a knitted fabric with the ability to transport liquid water over long distances.

Technical solutions

A knitted fabric with the ability to transport liquid water over long distances, including a fabric body formed by knitting at least two different yarns. The fabric body includes a liquid water expansion layer as a garment surface and a liquid water relay water storage layer on the skin surface. Diffusion layer, the liquid water expansion layer and the liquid water relay water storage diffusion layer make the fabric body form a double-layer 3D structure. The liquid water expansion layer is a weft plain stitch or a changing plain stitch structure, and the liquid water relay water storage diffusion layer is made of wool. The loop tissue structure is woven to form a coil area. The liquid water expansion layer and the liquid water relay water storage diffusion layer are woven with yarns of different fineness. The water conductivity of the liquid water expansion layer is greater than the conductivity of the liquid water relay water storage diffusion layer. Water capacity enables liquid water to conduct unidirectional conduction from the liquid water relay water storage diffusion layer to the liquid water expansion layer. The area of the coil area in the liquid water relay water storage diffusion layer should account for 30-30 of the surface area of the liquid water relay water storage diffusion layer. 70%, the vertical 5-minute climbing height of liquid water on the fabric body is above 12cm in at least one direction in the warp and weft directions.

As a further improvement, the liquid water relay water storage diffusion layer is woven with yarn Y1 with a fineness of DPF _Y1 , and the liquid water expansion layer is woven with yarn Y2 with a fineness of DPF _Y2 , 1.2≤DPF _Y1 :DPF _Y2≤ 3; The ratio of the yarn water conductivity LP1 of the liquid water relay water storage diffusion layer to the yarn water conductivity LP2 of the liquid water expansion layer is less than or equal to 0.7.

As a further improvement, the liquid water expansion layer is provided with a flower-shaped effect area. The flower-shaped effect area has a plurality of convex portions arranged at intervals. The area of the convex portions accounts for 20% of the surface area of the liquid water expansion layer. %-100%, the contact angle of the skin surface is ≤65°.

As a further improvement, the area of the convex portion of the pattern effect area on the liquid water expansion layer accounts for 30%-70% of the surface area of the liquid water expansion layer.

As a further improvement, the thickness of the protruding portion in the pattern effect area is greater than or equal to 0.3 mm.

As a further improvement, among the several protrusions arranged at intervals in the pattern effect area, the distance between two adjacent protrusions is greater than or equal to 0.1 mm and less than or equal to 3 cm.

As a further improvement, the fabric body is a knitted towel coil arrangement structure.

As a further improvement, the fabric body is woven using a knitting towel machine or a knitting machine capable of realizing a knitted towel coil arrangement structure.

As a further improvement, the yarn Y1 used in the liquid water relay water storage and diffusion layer is selected from one or more of synthetic fibers, man-made fibers and natural fibers and is mixed.

As a further improvement, the yarn Y2 used in the liquid water expansion layer is selected from one or more of synthetic fibers, man-made fibers and natural fibers and is mixed.

beneficial effects

There are pores of different sizes and shapes in the fabric, which produce a differential capillary effect, so that the fabric has the ability to conduct moisture. Through the liquid water relay storage diffusion layer and the liquid water expansion layer with different water conductivity, the fabric has the characteristic of allowing liquid water to conduct moisture from the liquid water relay storage diffusion layer to the liquid water expansion layer in a unidirectional manner; through the liquid water relay storage diffusion layer of the terry structure, a water storage layer is formed on the fabric, and when the fabric is vertically immersed in water, it can enable water to have a longer distance transmission effect on the fabric. According to the AATCC195 test, its OWTC is ≥100%. It has the characteristics of lightness, breathability, and quick drying in a unidirectional manner.

Description of the drawings

Figure 1 is a schematic cross-sectional structural diagram of Embodiment 1 of the present invention;

Figure 2 is a schematic diagram of the vertical immersion state of the present invention;

Figure 3 is a schematic cross-sectional structural diagram of Embodiment 2 of the present invention.

Reference signs:

1-Liquid water relay storage and diffusion layer; 2-Liquid water expansion layer; 3-Protrusion.

Best Mode of Carrying Out the Invention

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and are not to be construed as limitations of the present invention.

In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise" The indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation or in a specific manner. orientation construction and operation and therefore should not be construed as limitations of the invention. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined as “first” and “second” may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connect, or connect in one piece. The connection can be mechanical or electrical. It can be a direct connection or an indirect connection through an intermediary. It can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Embodiment 1

Referring to Figures 1-2, a knitted fabric with the ability to transport liquid water over long distances includes a fabric body formed by knitting at least two different yarns, and the fabric body has pores of different sizes and shapes. The fabric body includes a liquid water expansion layer 2 as the clothing surface and a liquid water relay water storage diffusion layer 1 as the skin surface. The liquid water expansion layer 2 and the liquid water relay water storage diffusion layer 1 make the fabric body form a double-layer 3D structure. The liquid water expansion layer 2 is a weft plain stitch or a changed plain stitch structure, the liquid water relay water storage diffusion layer 1 is a terry texture, and the liquid water expansion layer and the liquid water relay water storage diffusion layer use yarns of different fineness. Woven, the liquid water expansion layer and the liquid water relay water storage diffusion layer have different water conductivity, which allows the liquid water to conduct unidirectional conduction from the liquid water relay water storage diffusion layer to the liquid water expansion layer, and makes the vertical 5 of the fabric body Minute liquid water climbs to a height above 12cm in at least one direction in the meridional and latitudinal directions.

The knitted structure of the liquid water relay water storage diffusion layer is set to a terry structure, which can improve comfort when in contact with the human body.

The liquid water relay water storage diffusion layer can store liquid water, and then diffuse it through the liquid water diffusion layer. Through the storage of water at multiple levels, it helps liquid water to be transported over long distances.

The liquid water relay water storage and diffusion layer 1 serves as the skin surface and is in direct contact with the skin, which is conducive to the storage of liquid water. Then the liquid water expansion layer 2 has a strong water conductivity. Therefore, the liquid water in the liquid water relay diffusion layer will Actively transmits towards the liquid water expansion layer and evaporates through the liquid water expansion layer, thus keeping the fabric dry faster and improving comfort.

The liquid water relay storage diffusion layer is woven with yarn Y1 of DPF _Y1 fineness, and the liquid water expansion layer is woven with yarn Y2 of DPF _Y2 fineness, 1.2≤DPF _Y1 :DPF _Y2≤3 ; the yarn water conductivity LP1 of the liquid water relay storage diffusion layer: the yarn water conductivity LP2 of the liquid water expansion layer≤0.7. By limiting the fineness ratio of yarn Y1 and yarn Y2, it can effectively assist evaporation of water, thereby improving the quick-drying characteristics of the fabric.

After testing, by limiting the ratio of the yarn water conductivity LP1 of the liquid water relay water storage diffusion layer to the yarn water conductivity of the liquid water expansion layer to less than 0.7, more optimized water conductivity characteristics can be achieved. When the ratio of the yarn water conductivity LP1 of the liquid water relay water storage diffusion layer to the yarn water conductivity LP2 of the liquid water expansion layer is greater than 0.7 and less than 1, it indicates the water conductivity of the liquid water relay water storage diffusion layer. It is close to the water conductivity of the liquid water expansion layer, which will make the conductivity of the liquid water poor, that is, it is difficult to transfer the liquid water from the liquid water relay water storage diffusion layer to the liquid water expansion layer for dispersion in a timely manner. If the water conductivity of the liquid water relay water storage diffusion layer is set to be greater than the water conductivity of the liquid water expansion layer, the purpose of unidirectional moisture conduction of liquid water from the liquid water relay water storage diffusion layer toward the liquid water expansion layer cannot be achieved.

Embodiment 2

Referring to Figures 1-2, on the basis of Embodiment 1, the liquid water expansion layer 2 is provided with a pattern effect area, and the pattern effect area has a plurality of convex portions 3 arranged at intervals. The area of part 3 accounts for 20%-100% of the surface area of the liquid water expansion layer 2, and the contact angle of the skin-fitting surface is ≤65°. As the clothing surface, the liquid water expansion layer is an outward surface. By setting the pattern effect area, it can enhance the decoration on the one hand, and it can also facilitate the transmission of liquid water on the other hand.

In this embodiment, all the protrusions in the pattern effect area have the same shape, and the height of the protrusions is also the same. Of course, this is not limited to any situation, and the height and shape of all the protrusions in the pattern effect area must be the same. For example, some of the protrusions are in the shape of flower buds, and another part of the protrusions are in the shape of a crown, and the height or thickness of the protrusions can also be different, see Figure 3. The contact angle of the skin-fitting surface is set to less than 65 degrees, which is beneficial to moisture absorption. The thickness of the raised portion within the pattern effect area is greater than or equal to 0.3mm. Among several protrusions arranged at intervals in the pattern effect area, the distance between two adjacent protrusions is greater than or equal to 0.1mm and less than or equal to 3cm. Generally, the range between 2-10mm is better. separation distance.

Furthermore, the area of the convex portion of the pattern effect area on the liquid water expansion layer accounts for 30%-70% of the surface area of the liquid water expansion layer. Within this range, the setting of the pattern effect area is more precise. It is effective and has better decorative and visual effects on the overall fabric.

In addition, for the liquid water relay water storage and diffusion layer, a terry structure is used to weave, which will form several coils, so there are coil areas and non-coil areas. In order to better store water and relay conduction, the liquid water relay water storage and diffusion layer can also be provided with a raised flower effect layer. In the liquid water relay water storage and diffusion layer, the ratio of the coil area to the entire surface area of the liquid water relay water storage and diffusion layer is set between 30% and 70%. After testing, the coil area of the liquid water relay water storage and diffusion layer is less than 30%, the water storage is small, and the purpose of relay conduction cannot be achieved. Compared with the water absorption of ordinary flat fabrics, the advantage is not great; while the coil area is greater than 70%, the water storage area has too much water, the rising acceleration is small, the climbing is slow, the water in the relay area of relay conduction rises slowly, and it is difficult to relay quickly, and it is difficult to form excellent capillary transport capacity.

Embodiment 3

The fabric body may be a knitted towel coil arrangement structure, such as a weft knitted towel structure, a single sweatshirt structure, a double sweatshirt structure, a warp knitted towel structure, and other knitted structures with loops.

In addition, the liquid water relay water storage and diffusion layer of the fabric has a towel coil arrangement structure, and the towel coil arrangement structure can be woven by means of jacquard, needle drawing, drawing yarn, etc. It can be woven using a knitting towel machine, or other knitting machines that can make a knitted towel coil arrangement structure. These equipments are all existing well-known equipments and will not be listed here one by one.

The yarn Y1 used in the liquid water relay water storage diffusion layer is selected from one or more of synthetic fibers, man-made fibers and natural fibers. The yarn Y2 used in the liquid water expansion layer is selected from one or more of synthetic fibers, man-made fibers and natural fibers.

Through the above setting, the moisture conductivity of the fabric body is AATCC195OWTC≥100%, preferably ≥500%. The drying speed of the fabric body under the fabric drying rate hot plate method AATCC201 test is ≥0.5ml/h, preferably ≥1.0ml/h.

The following is a detailed analysis of the specific moisture conduction and transmission capabilities.

Capillary action is the attraction of a liquid surface to a solid surface. When a capillary tube is inserted into the infiltration liquid, the liquid level inside the tube rises and is higher than the liquid level outside the tube. This phenomenon is called capillary phenomenon.

Fabric wicking is a dynamic wetting phenomenon. For porous fabrics, the wetting process not only depends on the characteristic parameters and surface properties of its equilibrium state, but also depends on the geometric characteristics of the porous material. Therefore, the wetting performance of the fabric is not only affected by the fiber wettability, but also by the parameters of the fabric structure. The formula for the height of liquid rising and falling in capillary phenomenon is as follows (1):

h＝2σcosθ/ρgγ (1)

In the formula:

h The height of the liquid rising in the capillary tube, (unit: m),

σ is the surface tension coefficient of the liquid (unit: N/m),

θ is the intersection angle between the liquid surface and the pipe wall, (unit: °),

ρ is the liquid density, which depends on material factors, (unit: kg/m ³ ),

g is the acceleration of gravity, (unit: m/s ² ),

γ is the inner radius of the capillary (unit: m).

Knitted fabrics with super capillary transport capabilities for liquid water. Based on the above capillary phenomenon, a relay water storage diffusion layer of liquid water is added to form a relay conduction function. As shown in Figure 1, when the fabric is suspended vertically in liquid water, the liquid water climbs upward simultaneously along both sides of the fabric under capillary action. The theoretical calculation of the climbing height is h ₁ =2σcosθ/ρgγ. Due to the existence of With the relay water storage diffusion layer structure, liquid water can be transferred horizontally at this position. If there is no time limit, it can eventually reach the cd position in Figure 1. The relatively large amount of liquid water stored in the cd plane makes cd The surface becomes a new horizontal surface, and on this basis, the relay continues to climb upward. Finally, the liquid water climbs h ₂ =h ₁ +2σcosθ/ρgγ. The above is a simple analysis of the process of transferring the relay once. This process can be repeated many times. Longer distance transmission can be carried out if the water quantity and time are sufficient.

In the present invention, the knitted fabric has super capillary transport ability of liquid water. On the basis of the above capillary phenomenon, a relay water storage diffusion layer of liquid water is added to produce a relay conduction effect. The liquid water rapidly expands and climbs to a certain height, conducts horizontal conduction, forms a new horizontal plane, continues the capillary effect, and reaches a new capillary height. Super capillary transport capacity, thereby accelerating the evaporation rate of liquid in the fabric, achieving quick drying of the fabric and producing a dry effect.

The following uses examples to further elaborate.

Example 1:

1. Yarn used: PES 75/96 FD DTY Shenghong+PES 75/36 FD DTY Shenghong+PU 30 Xiaoxing.

2. Weaving equipment: 26-needle weft knitting jacquard towel machine.

3. Post-finishing project.

Booking - dyeing - dehydration - post-styling - fabric inspection.

4. Fabric testing.

Knitted into product number: TSJT0208-TDFX8, yarn used: PES 75/96 FD DTY Shenghong+PES 75/36 FD DTY Shenghong+PU 30 Xiaoxing, the pattern area accounts for 50%.

Below we use the Nike Dry Fit 3 moisture absorption and quick drying test method to test and get the following data:

5. Fabric style.

The fabric body includes a liquid water rapid expansion layer and a liquid water relay water storage diffusion layer. The liquid water relay water storage diffusion layer has a certain pattern effect. The coil area area S1: the total area S = 50%; for the liquid water in the unit area Water conductive capacity of water relay water storage diffusion layer yarn (LP1): The yarn in the unit area of liquid water rapid expansion layer yarn (LP2) ≤ 0.7, thus forming the liquid water one-way moisture conduction effect of the fabric to make more The sweat is unidirectionally transmitted from the terry surface to the flat layer, and at the same time, due to the capillary effect relay conduction ability, the fabric of the present invention has the characteristics of breathability, single guide and quick drying.

5. Test data

(1) Fabric specifications: 185cm*200gsm.

(2) Ingredients: 94% polyester+6% spandex.

(3)breathable:771mm/s(GB/T5453).

(4)OWTC%=974%.

(5)dry rate:1.28ml/h(AATCC201).

It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still implement the foregoing implementations. Modifications may be made to the technical solutions described in the examples, or equivalent substitutions may be made to some of the technical features. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention shall be included in the protection of the invention. within the range.

Claims

A knitted fabric with the ability to transport liquid water over long distances, characterized in that it includes a fabric body formed by knitting at least two different yarns, and the fabric body includes a liquid water expansion layer as a garment surface and a liquid water skin-adjacent layer. Water relay water storage diffusion layer. The liquid water expansion layer and the liquid water relay water storage diffusion layer make the fabric body form a double-layer 3D structure. The liquid water expansion layer is a weft flat stitch or a change flat stitch structure. The liquid water relay water storage The diffusion layer is woven with a terry structure to form a coil area. The liquid water expansion layer and the liquid water relay water storage diffusion layer are woven with yarns of different fineness. The water conductivity of the liquid water expansion layer is greater than that of the liquid water relay water storage. The water conductivity of the diffusion layer enables one-way conduction of liquid water from the liquid water relay water storage diffusion layer to the liquid water expansion layer. The area of the coil area in the liquid water relay water storage diffusion layer should account for the surface of the liquid water relay water storage diffusion layer. 30-70% of the area, and the liquid water climbing height of the fabric body in vertical 5 minutes is above 12cm in at least one direction in the warp and weft direction.
The knitted fabric with the ability to transport liquid water over long distances according to claim 1, characterized in that the liquid water relay water storage diffusion layer is woven with yarn Y1 with a fineness of DPF Y1 , and the liquid water expansion layer is woven with a fineness of DPF Y1 Weaving yarn Y2 of DPF Y2 , 1.2≤DPF Y1 :DPF Y2 ≤3; the ratio of the yarn water conductivity LP1 of the liquid water relay water storage diffusion layer to the yarn water conductivity LP2 of the liquid water expansion layer is less than or equal to 0.7 .
The knitted fabric with the ability to transport liquid water over long distances according to claim 2, wherein the liquid water expansion layer is provided with a pattern effect area, and the pattern effect area has a plurality of protrusions arranged at intervals. The area of the raised part accounts for 20%-100% of the surface area of the liquid water expansion layer, and the contact angle of the skin-fitting surface is ≤65°.
The knitted fabric with the ability to transport liquid water over long distances according to claim 3, wherein the thickness of the protruding portion in the pattern effect area is greater than or equal to 0.3 mm.
The knitted fabric with the ability to transport liquid water over long distances according to claim 4, characterized in that, among a number of convex parts arranged at intervals in the pattern effect area, the distance between two adjacent convex parts is The spacing distance is greater than or equal to 0.1mm and less than or equal to 3cm.
The knitted fabric capable of transporting liquid water over long distances according to claim 5, wherein the distance between two adjacent protrusions is 2-10 mm.
The knitted fabric with the ability to transport liquid water over long distances according to claim 6, wherein the thickness of the protruding portion in the pattern effect area is preferably greater than 1.0 mm.
The knitted fabric capable of transporting liquid water over long distances according to claim 7, wherein the fabric body is a knitted towel coil arrangement structure.
The knitted fabric with the ability to transport liquid water over long distances according to any one of claims 1 to 8, characterized in that the yarn Y1 used in the liquid water relay water storage diffusion layer is selected from synthetic fibers, artificial fibers and natural fibers. A blend of one or more fibers.
The knitted fabric with the ability to transport liquid water over a long distance according to any one of claims 1 to 9, characterized in that the yarn Y2 used in the liquid water expansion layer is selected from synthetic fibers, artificial fibers and natural fibers. A mixture of one or more.