TW201738422A - Double-sided knitted fabric - Google Patents

Abstract

A double-sided knitted fabric comprises a surface layer and an inner layer, which are connected in a looping manner. The inner layer has a concavo-convex structure, and at least one of the longitudinal and lateral directions of each convex portion unit is composed of 3 to 10 loops. The skin-contact surface of the double-sided knitted fabric has excellent dry performance, has a good comfort level for wearing, especially is suitable for production of T-shirts, POLO shirts and the like.

Description

Double-sided knitted fabric

The invention relates to a double-knit fabric, in particular to a double-knit fabric capable of maintaining the dryness of human skin.

With the advancement of technology, new design concepts are constantly being applied to the development of apparel fabrics. In the hot summer, sweat treatment has become an important topic in the field of clothing. In the hot summer, the body generally reduces the body to a comfortable temperature by excreting sweat. However, when the body sweats a lot, the clothing is easily soaked by the sweat and adheres to the skin, hindering further sweating and cooling of the body. , causing discomfort such as stuffiness and pressure.

At present, there are many technologies on the market for water absorption and perspiration, which have certain effects on handling a small amount of sweating, but when the body sweats a lot, the fabric will still stick to the skin, causing discomfort. A three-dimensional water-conducting single-sided double-layer knitted fabric disclosed in the patent document CN204281985U, wherein the surface layer is a moisture-absorbing and quick-drying layer formed by a hydrophilic modified polyester low-elastic fiber, and the inner layer is a water-repellent layer formed by a nylon coated yarn. The moisture-absorbing and quick-drying layer protrudes to the water-repellent layer to form a U-shaped structure, the fabric absorbs sweat through the U-shaped structure, and the water-repellent layer prevents the fabric from sticking to the skin when sweating, so it has a certain dry effect. However, when the human body produces a large amount of sweat, the thickness of the water-repellent layer is insufficient to prevent the surface layer of the fabric from adhering to the human skin due to the use of a single-sided structure. Further, the convex U-shaped structure itself is in contact with the skin, so A fabric covered with sweat is more likely to stick to the skin; In addition, since the inner layer is a water repellent layer, the sweat absorption capacity is insufficient, and sweat is difficult to discharge in time.

For example, a fabric for clothing disclosed in Japanese Patent Laid-Open Publication No. 2011-226026A, wherein the inner layer forms a lateral or longitudinal groove, and the convex portion between the groove and the groove is a water-repellent yarn, on the skin. The sweat can flow through the convex portion to the groove and flow out through the groove by the gravity of the sweat itself, which brings a dry effect to the skin surface to a certain extent, but because the convex portion uses the water-repellent yarn, the sweat absorption performance is better. Low, sweat can not be remitted to the surface in a timely manner when sweating a lot; in addition, the continuous convex part causes the skin to feel strong and the wearing comfort is insufficient.

For example, a double-knit fabric having an evaporation layer and a moisture-conducting layer disclosed in the patent document CN204281985U, by providing a concave-convex structure to the moisture-conducting layer, forms a certain air circulation space between the skin and the fabric, and gives the human body a belt. At the same time, by the difference in linear density between the evaporation layer and the moisture-conducting layer, the single-guide wettability of the fabric is increased, and the quick-drying effect is improved. However, since the concave-convex structure is formed by the tucking connection, the concave portion has no moisture-conducting coil, so that the perspiration performance of the fabric is greatly reduced; further, when the human body produces a large amount of sweat, it is guided by the convex portion in contact with the skin. If you sweat and sweat, you still can't effectively solve the problem of the fabric sticking to the skin.

Therefore, it has been very important to develop a fabric that can maintain the dryness of the skin in the case of excessive sweating.

In view of the above problems, an object of the present invention is to provide a double-knit fabric which is simple in processing and which can adhere to the skin while maintaining a dry feeling in the skin in a large amount of sweat.

The double-knit fabric of the present invention, including the surface layer and the inner layer, the surface layer and the inner layer The layers are connected in a loop, and the inner layer has a concave-convex structure, and at least one of the longitudinal and lateral directions of each convex unit is composed of 3 to 10 coils.

The present invention is obtained by forming a specific uneven structure in the inner layer by using a double-sided full-loop structure. Using a specific concave and convex structure to discharge sweat in time, effectively improving the problem of the skin sticking to the skin, even if a lot of sweating can maintain the dry performance of the skin contact surface, the wearing comfort is better, and is particularly suitable for making T-shirts, POLO shirts, etc. .

1‧‧‧ surface

2‧‧‧ inner layer

3‧‧‧The convex part of the inner layer

4‧‧‧ Inside the recess

5‧‧‧The number of transverse coils of the convex unit

6‧‧‧The number of longitudinal coils of the convex unit

7‧‧‧Number of transverse coils in the recess unit

8‧‧‧Number of longitudinal coils of the recessed unit

A‧‧‧ Straight line tangent to the surface of two adjacent recesses

B‧‧‧ Straight line tangent to the surface of two adjacent convex parts

H‧‧‧ Height of the inner convex

1 is a schematic view showing the structure of a double-knit fabric according to the present invention, wherein 1 is a surface layer, 2 is an inner layer, 3 is a convex portion of the inner layer, 4 is a concave portion of the inner layer, and h is a height of the inner layer convex portion.

2 is a schematic view of a concave-convex structure unit, wherein 5 is the number of transverse coils of the convex unit, 6 is the number of longitudinal coils of the convex unit, 7 is the number of transverse coils of the concave unit, and 8 is the longitudinal coil of the concave unit. Number.

Considering that the single-sided structure is too thin and cannot effectively hinder the fabric which has been soaked by sweat adhered to the skin, the present invention selects a double-sided structure having a surface layer and an inner layer which are woven by a double-sided circular knitting machine. In the double-sided circular knitting fabric, there are three ways to connect the two layers in the watch. The first one is the tucking method, that is, the dial and the syringe are both on the circumference, and the connected yarn is sandwiched between the two layers, when the human body sweats. At the time, since the surface of the inner layer is relatively flat, sweat easily spreads in the inner layer, and it is difficult to obtain a dry feeling on the skin surface. The second type is a loop forming method in which the dial and the syringe are looped, the connected yarns have coils on both sides, and the surface having the concave-convex structure can be obtained by the difference in tissue design or braided wire length, so that the fabric and the skin Forming point contact, increasing the air loop between the fabric and the skin In addition, the human body has a refreshing feeling; in addition, the sweat can quickly resurface the surface through the concave portion formed by the connecting wire to achieve the dry feeling of the skin surface; the third is the combination of the tuck and the loop, that is, the needle The ring forming ring or the dial ring is formed into a loop, and the connecting yarn forms a mesh on the side of the loop, although such a mesh structure can increase the air loop between the fabric and the skin to some extent. Space, however, the pore portion of the mesh has no looping coils that can be used to conduct sweat, and can only rely on non-mesh portions that are in contact with human skin, and the drying effect is greatly reduced. Therefore, the present invention selects the two layers in the watch in a looped manner.

In the present invention, the arrangement of the uneven structure is not particularly limited, and may be continuous or discontinuous. However, in view of the convenience of weaving, it is preferred that the uneven structures are continuously arranged.

In addition, in the uneven structure, the size of the convex unit also affects the dry effect of the fabric. When the number of longitudinal and lateral coils constituting the convex unit is less than three, the fabric directly contacting the skin in the unit area is too small, and it is difficult to form an effective air circulation passage in the garment, and the dry effect is poor; when the convex unit is formed When the number of the longitudinal and lateral coils is more than 10, a large convex portion is formed in the inner layer, the skin contact feeling is poor, and sweat easily spreads and stays in the convex portion, and it is difficult to improve the dry effect. Therefore, in the uneven structure of the present invention, at least one of the longitudinal and lateral directions of each convex unit is composed of 3 to 10 coils, and more preferably 3 to 10 coils are vertically and horizontally.

The size of the recess unit in the uneven structure is not particularly limited in the present invention. Considering that when the number of longitudinal and lateral coils constituting the concave unit is less than three, the sweat-wicking ability is lowered, and there is a possibility that sweat is stagnated in the inner layer of the fabric; when the number of longitudinal and lateral coils constituting the concave unit is When there are more than 10, although the sweating performance is improved, it also increases the probability of contact between the concave part and the fabric. It may be possible after sweat absorption. Now the fabric sticks to the skin. Therefore, in the present invention, it is preferable that at least one of the longitudinal and lateral directions of each of the concave unit is constituted by 3 to 10 coils, and more preferably 3 to 10 coils are vertically and horizontally.

Considering the concave-convex structure of the inner layer of the fabric, the height of the convex portion unit has a certain influence on the dry effect of the fabric. Therefore, in the present invention, the height of the convex portion unit is preferably 0.05 to 0.40 mm, more preferably 0.10 to 0.30 mm. . When the height of the convex unit is less than 0.05 mm, the contact area between the fabric and the skin tends to increase, and the fabric may be soaked with sweat and adhered to the skin after sweating; generally, the height of the convex unit is larger. The more it can block the contact between the fabric and the skin, the better the dryness effect. However, when the height of the convex unit is more than 0.40 mm, the tingling feeling may occur when worn, and the wearing comfort is lowered.

In the present invention, it is very important to form the convex fibers on the reverse side of the fabric. Mainly from two aspects, on the one hand, if non-polyester fibers such as cellulose fiber and nylon fiber are used, because these fibers have superior hygroscopicity, the reverse side of the fabric easily absorbs a large amount of water, and some of the water is difficult to diffuse in time. To the surface, it may cause the water retention on the reverse side to increase, the wearing comfort to be reduced, and the sultry feeling to be generated; on the other hand, if the non-elastic polyester fiber is used, the degree of yarn shrinkage during the post-woven processing is too small, It may not be possible to obtain the desired height of the protrusions, and the phenomenon that the quick-drying effect is not obvious may occur. Therefore, it is preferable to use a polyester-based elastic fiber for the convex fiber on the reverse side of the fabric of the present invention.

The polyester-based elastic fiber used in the present invention is preferably an elastic fiber having a stretch recovery ratio (CR value) of 30 to 70%. The polyester-based elastic fiber having a CR value within this range has good curling property, and the convex portion of the back surface of the fabric formed by the film has a high height, and even if a large amount of sweat is applied, the fabric is not easily adhered to the skin and can always be kept in contact with the skin. A dry feeling. The CR value is preferably 40 to 60%.

The type of the polyester-based elastic fiber used in the present invention is not particularly limited, and may be a one-component elastic fiber, a two-component side-by-side elastic fiber, a high-elastic false-twisted yarn, or the like, preferably poly-p-phenylene. Butylene formate (PBT), polytrimethylene terephthalate (PTT), polybutylene terephthalate / polyethylene terephthalate (PBT / PET), polyterephthalic acid Propylene glycol ester / polyethylene terephthalate (PTT / PET), high viscosity PET / low viscosity PET. However, considering that the two-component side-by-side elastic fiber has better bundling property than the one-component elastic fiber and is more advantageous for improving the yarn resistance of the fabric, it is preferred to use a two-component side-by-side elastic fiber. Further, the form of the elastic fiber is not particularly limited, and may be a full drawn yarn FDY or a false twisted textured yarn DTY.

The polyester elastic fiber used in the present invention preferably has a fineness of 50 to 200 denier (D), more preferably 60 to 80 denier (D), to ensure the grammage and soft hand of the fabric.

In the present invention, the yarn of the surface layer, the yarn of the inner layer concave portion, and the fiber raw material for connecting the yarn may be the same or different, and are not particularly limited. When the fiber raw materials are different, they may be cellulose fibers such as cotton, viscose, etc., and may also be synthetic fibers such as non-elastic ordinary polyester fibers, nylon fibers, etc., and may also be protein fibers such as wool, silk, and the like.

In order to impart excellent elasticity to the fabric, the spandex bare filament can also be used for mixing in the present invention. The fineness of the spandex bare wire is preferably 20 to 70D. The greater the span of the spandex, the greater the shrinkage of the fabric and the thicker the fabric. In order to ensure the lightweightness of the fabric, the fineness of the spandex bare yarn in the present invention is preferably 20 to 40D.

In the knitted fabric of the present invention, the water retention ratio of the inner layer is preferably 10% or less, more preferably 5% or less. The water retention rate in the watch is preferably 3.0 or more, more preferably 3.0 to 40.0. The greater the water retention ratio (ratio) in the watch, and the smaller the water retention rate inside, the better the dryness of the fabric. Even in the case of excessive sweating, sweat can be quickly absorbed and transmitted. When it spreads to the surface, the surface that comes into contact with the skin can always be dry and does not affect the comfort of continuous wear.

The invention will now be further illustrated by way of examples and comparative examples. Among them, the characteristics in the examples were tested and obtained by the following methods.

(1) The height of the convex portion of the concave and convex structure of the inner layer of the fabric

First, a 1.0 cm × 0.5 cm sample is cut according to the woven texture of the fabric, and the sample is adhered to the convex sample stage (the longitudinal direction of the fabric is perpendicular to the surface of the convex sample stage); secondly, using KEYENCE VHX -2000C Microscope observation of the cross section of the prepared sample. Specifically, the microscope magnification is adjusted to 150 times, and the observation is subjected to depth synthesis and 3D display, and then a straight line a is selected to be tangent to the surfaces of the adjacent two concave portions, and then another straight line b is selected to be parallel to the above-mentioned straight line a. And tangential to the two adjacent convex portions, and measure the distance h between the two straight lines of ab, that is, the height of the convex portion; according to this method, 10 points of the sample cloth are respectively measured, and the two largest values are removed. The two smallest values give the middle six values, and the average value is calculated. The average value obtained is the height of the convex portion in the uneven structure of the inner layer of the fabric.

(2) Inner layer water retention rate and surface water retention ratio

1 Cut 10 pieces of 10cm × 10cm sample cloth from the fabric, and take 6 pieces of filter paper of the same size, and take 1 piece of plexiglass of the same size. Weigh the weight of the plexiglass (W ₀ ) and the sample cloth (W ₁ ) at a temperature of 20 ° C and a humidity of 65% (retaining three decimal places); 2 using a syringe to measure 2 ml of distilled water in an organic On the glass, quickly place the sample cloth on the water. After standing for 1 minute, weigh the weight of the sample after water absorption (W ₂ ) (three places after the decimal point); 3 Weigh the weight of the plexiglass and the remaining distilled water after the weighing test (W ₃ ) (retains three decimal places); 4 weighs the weight of the two pieces of filter paper before the water absorption (w1, w3) (retains three decimal places); 5 puts the sample after water absorption on the two pieces of filter paper In the middle, and placed 500 grams of heavy objects on it, after 1 minute, directly measure the weight of the surface filter paper and the inside filter paper (w2, w4) (three places after the decimal point); 6 calculated by the following formula Water retention ratio (one bit after the decimal point), surface water retention rate (%) = (w2-w1) / (W _{2 -} W ₁ ) × 100

The inner layer water retention rate (%) = (w4-w3) / (W _{2 -} W ₁ ) × 100

Water retention ratio in the table = surface water retention rate (%) / water retention rate (%)

W ₀ : weight of the plexiglass before water absorption (g)

W ₁ : weight of the sample cloth before water absorption (g)

W ₂ : weight of the sample after water absorption (g)

W ₃ : weight of plexiglass and residual distilled water after water absorption (g)

W1: weight of filter paper on the front surface of water absorption (g)

W2: weight of surface filter paper after water absorption (g)

W3: the weight of the filter paper inside the water absorption (g)

W4: The weight (g) of the filter paper inside the water absorption.

(3) Retraction recovery rate CR value

a. First adjust the yarn to be tested under standard atmospheric pressure for 12 hours; b. Use a crepe length gauge to take 10 meters of yarn to be tested (10 turns × 1 m / turn), the yarn end and the yarn end Knotted and marked with colored markings on the skein for hanging on the test frame; c. Place the wire in standard atmospheric conditions and equilibrate for more than 12 hours before heat treatment; d. Add the constant temperature water tank A certain amount of soft water ensures that the sample is completely submerged and does not touch the wall of the tank and sets the bath temperature to 90 °C. The sample is folded in half and folded in half. It is packed in a mesh bag in a relaxed state, and the mesh bag containing the sample is carefully placed in hot water, uniformly stirred by a glass rod, and the treatment time is 20 minutes. After heat treatment, Carefully remove the mesh bag with a clip and place it in the tray. After the mesh bag is cooled, the sample is loosely and tension-free, and is equilibrated in a standard atmosphere after heat treatment. e. Performing initial load and constant load Calculation: initial load (g): 0.002g / D × D × 2 × number of turns, fixed load (g): 0.1g / D × D × 2 × number of turns, D: yarn fineness (Danny); f Put a lot of soft water into the test tube one day in advance, and adjust the temperature to 20 ° C for 12 hours under standard atmospheric pressure; g. Hang the sample on the hook of the hanging yarn, and hang the initial load and the order on the color mark line on the other end. Load, pay attention to the adjustment of tension, put it into the soft water in a large number of cylinders, and use the code meter to time. After 2 minutes, read the length L of the sample with a ruler to the nearest 1 mm (mm); take it with a hook. Load, keep the initial load state, put 2 minutes, 2 minutes later, read the sample length L1 with a ruler, accurate to 1mm; The formula for calculating the shrinkage recovery rate (ie, the yarn CR value):

Where: CR: expansion recovery rate, %; L: initial load plus sample weight, sample length, mm; L1: remove the fixed load, sample length under the initial load, mm.

(4) Flexibility

The elastic elongation was tested according to JIS L 1096:2010D method. Among them, elastic elongation 60% judged to be excellent, indicated by ◎; 45% The elastic elongation <60% was judged to be good, and it was represented by ○; the elastic elongation <45% was judged to be normal, and it was represented by Δ.

(5) Anti-hooking property

The anti-hooking property was tested according to the JIS L1058:2011 method. Among them, anti-hooking Level 4 judgment is excellent, indicated by ◎; level 3 The anti-hooking property <4 grade is judged to be good, and it is represented by ○; the anti-hooking property <3 grade is judged to be general, and it is represented by △.

[Example 1]

On the 28-pin double-sided circular knitting machine, the odd-numbered road uses 75D-72f-common PET DTY (made by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the even-numbered road uses 60D-24f-PBT DTY (CR value is 49%, East) Li Synthetic Fiber (Nantong) Co., Ltd.) Weaving the fabric with 12-way braiding loop, and pre-treating the fabric (refining agent 1g/L, temperature 95°C), dyeing (dispersive dye, 130°C) ×30 min), finishing work (hydrophilic resin 10 g/L, neutralizing acid 1 g/L), and the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

Wherein, during weaving, all the needles on the dials of the first, third and fifth paths are formed into a surface layer, and the fourth to sixth stitches on the needle cylinder are looped to form a concave portion of the inner layer; the seventh, the ninth, the eleventh All the needles on the dial are formed into a surface layer, and the first to third stitches on the needle cylinder are looped to form the concave portion of the next loop; the second, fourth, and sixth paths are on the first to the syringe. 3 stitches, 4th to 6th needle floats form the convex part of the inner layer; in the 8th, 10th, and 12th roads, the 1st to 3rd needles on the needle cylinder are floating lines, and the 4th to 6th needles are looped to form the next The convex part of the loop.

[Embodiment 2]

The fabric is woven by a 20-way weaving loop. When weaving, all the needles on the dials of the 1, 3, 5, 7, and 9 are formed into a surface layer, and the fourth layer on the needle cylinder. 6 needles are looped to form the concave part of the inner layer; the 11th, 13th, 15th, 17th and 19th roads are all formed on the dial to form a surface layer, and the 1st to 3rd stitches on the needle cylinder form a circle to form the next loop. The concave portion; the 2nd, 4th, 6th, 8th, and 10th roads are formed by the first to the 10th stitches on the needle cylinder, and the 11th to the 15th needle floating lines are formed into the convex portion of the inner layer; the 12th, 14th, 16th, 18th, and 20th In the middle of the road, the first to fifth stitches on the needle cylinder are float lines, and the sixth to fifteenth stitches are formed into loops to form the convex portions of the next loop. The rest of the same manner as in the first embodiment, the knitted fabric of the present invention is obtained. The specific performance is shown in Table 1.

[Example 3]

The 12-way weaving loop is used to weave the fabric. When weaving, all the needles on the dials of the 1st, 3rd, and 5th roads are formed into a surface layer, and the 6th to 8th stitches on the needle cylinder are formed into a loop. The concave portion of the inner layer; the seventh, ninth, and eleventh paths are formed on all the needles on the dial to form a surface layer, and the first to third needles on the needle cylinder are looped to form a concave portion of the next loop; the second, fourth, and sixth The 1st to 5th stitches on the syringe are looped, and the 6th to 8th needle floats form the convex part of the inner layer; the 1st to 3rd needles on the 8th, 10th, and 12th roads are the floating line, 4th The ~8 needle is a convex part that forms a circle in the next loop. The rest of the same as in Example 1 gave the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Example 4]

The odd-numbered road uses 60S cotton spun yarn (made by Jiangsu Wuxi First Cotton Spinning Factory), and the even-numbered road uses 75D-48f-PBT/PET DTY (CR value: 41%, Toray Synthetic Fiber (Nantong) Co., Ltd.) to 20 roads. Weaving a woven loop to obtain a grey fabric. When weaving, all the needles on the dials of the 1, 3, 5, 7, and 9 are formed into a surface layer, and at the same time The 6th to 9th needles on the cylinder form a circle to form the concave part of the inner layer; the 11th, 13th, 15th, 17th and 19th roads all form a circle on the dial, forming the surface layer, the 1st to 4th needles on the needle cylinder The loop forms the recess of the next loop; the 2nd, 4th, 6th, 8th, and 10th roads are stitched in the first to the fifth stitches on the needle cylinder, and the 6th to 9th needle float lines form the convex portion of the inner layer; In the 14th, 16th, 18th, and 20th roads, the 1st to 4th needles on the needle cylinder are floating lines, and the 5th to 9th needles are looped to form a convex portion of the next loop, and the rest is the same as in the first embodiment, and the knitting of the present invention is obtained. Fabric. The specific performance is shown in Table 1.

[Example 5]

The odd-numbered roads are made of 40D-24f-nylon FDY (made by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the even-numbered roads are made of 50D-24f-PTT DTY (CR value of 31%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.). 20-way woven loop for weaving to obtain the grey fabric. When weaving, the first, third, fifth, seventh, and ninth roads all the needles on the dial are formed into a surface layer, and the sixth to eighth needles on the needle cylinder are formed. The circle forms a concave portion of the inner layer; the 11th, 13th, 15th, 17th, and 19th roads form a surface layer on all the needles on the dial, and the first to third needles on the needle cylinder form a circle to form a concave portion of the next loop; The 2nd, 4th, 6th, 8th, and 10th roads are stitched in the first to fifth stitches on the needle cylinder, and the sixth to eighth needle float lines form the convex part of the inner layer; in the 12th, 14th, 16th, 18th, and 20th roads The first to third needles on the cylinder were float lines, and the fourth to eighth needles were formed into loops to form the next loop. The rest of the same manner as in Example 1 gave the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Embodiment 6]

The odd-numbered road uses 60S polyester/viscose blended spun yarn (made by Jiangsu Wuxi First Cotton Spinning Factory), and the even-numbered road uses 50D-24f-PTT/PET FDY (CR value is 40%, Dongli Synthetic Fiber (Nantong) Co., Ltd. The fabric is woven by a 16-way weaving loop. When weaving, the first, third, fifth, and seventh paths on the dial are fully formed into a surface layer. At the same time, the 7th to 10th stitches on the syringe form a recess in the inner layer; the 9th, 11th, 13th and 15th roads all form a circle on the dial, forming the surface layer, the 1st to 4th needles on the needle cylinder The loop forms the recess of the next loop; the 2nd, 4th, 6th, and 8th roads form the first to sixth stitches on the cylinder, and the 7th to the 10th floats form the convex part of the inner layer; 10th, 12th, 12th In the 14th and 16th roads, the 1st to 4th needles on the cylinder are float lines, and the 5th to 10th stitches are looped to form the convex portion of the next loop, and the rest of the same as in the first embodiment, the knitted fabric of the present invention is obtained. The specific performance is shown in Table 1.

[Embodiment 7]

The even-numbered road was selected from 60D-24f-PBT DTY (CR value of 35%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the same as in Example 3, the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

[Embodiment 8]

The even-numbered road was selected from 60D-36f-normal PET DTY (CR value: 20%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the rest was the same as in Example 3 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Embodiment 9]

The odd-numbered roads use 75D-72f-common PET DTY (made by Toray Synthetic Fiber (Nantong) Co., Ltd.) and 30D spandex (United States INVISTA), and even-numbered roads use 75D-36f-high-elastic PET DTY (CR value is 30%, Toray Synthetic Fiber (Nantong) Co., Ltd.), and the same as in Example 3, the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

[Embodiment 10]

The odd-numbered roads use 75D-72f-common PET DTY (made by Toray Synthetic Fiber (Nantong) Co., Ltd.), and even-numbered roads use 75D-48f-PBT/PET DTY (CR value) 41%, Toray Synthetic Fiber (Nantong) Co., Ltd.), and the same as in Example 4, the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

[Example 11]

The odd-numbered road uses 75D-72f-common PET DTY (Dongli Synthetic Fiber (Nantong) Co., Ltd.), and the even-numbered road uses 50D-24f-PTT DTY (CR value is 31%, Toray Synthetic Fiber (Nantong) Co., Ltd.) The rest, in the same manner as in Example 5, gave the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Embodiment 12]

Odd road uses 75D-72f-common PET DTY (Dongli Synthetic Fiber (Nantong) Co., Ltd.), even-numbered road uses 50D-24f-PTT/PET FDY (CR value 40%, Toray Synthetic Fiber (Nantong) Co., Ltd. The same as in Example 6, the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

[Example 13]

The 8th road is woven into a woven loop to obtain the grey fabric. When weaving, all the needles on the dials of the 1st and 3rd roads are fully formed into a surface layer, and at the same time, the 4th and 5th stitches on the cylinder are formed in a circle. The concave portion of the layer; the 5th and 7th roads all the needles on the dial are formed into a surface layer, and the first and second needles on the needle cylinder are looped to form a concave portion of the next loop; the second and fourth paths are on the syringe The first to third stitches are formed, and the fourth and fifth needle floats form the convex portion of the inner layer; in the sixth and eighth paths, the first and second needles on the needle cylinder are floating lines, and the third to fifth needles are formed into circles. The convex portion of the next loop was the same as in Example 1 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Embodiment 14]

The 12th road is woven into a woven loop to obtain a grey fabric. When weaving, all the needles on the dials of the 1, 3, and 5 are formed into a surface layer, and the needle is simultaneously formed. The 3rd to 5th stitches on the upper circle form the concave part of the inner layer; the 7th, 9th, and 11th roads form a surface layer on all the needles on the dial, and the 1st to 3rd stitches on the needle cylinder form a circle to form the next back. The concave portion of the circle; the first, second, and second needles on the second, fourth, and sixth sides of the needle are looped, and the third to fifth needle float lines form the convex portion of the inner layer; and the eighth, tenth, and second paths are on the needle cylinder. The first to third stitches were float lines, and the fourth and fifth stitches were formed into loops to form the next looped convex portion, and the same as in the first embodiment, the knitted fabric of the present invention was obtained. The specific performance is shown in Table 1.

[Example 15]

An intermediate setting (temperature 190 ° C, vehicle speed 20 m/min) was added between the pretreatment processing and the dyeing, and the rest was the same as in Example 3 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Example 16]

The even-numbered road was selected from 30D-24f-PBT DTY (CR value: 49%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the rest was the same as in Example 3 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Example 17]

The even-numbered road was selected from 250D-96f-PBT DTY (CR value: 49%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the rest was the same as in Example 3 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Embodiment 18]

The even-numbered road was selected from 75D-48f-PBT DTY (CR value: 41%, manufactured by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the rest was the same as in Example 10 to obtain the knitted fabric of the present invention. The specific performance is shown in Table 1.

[Comparative Example 1]

Weaving the fabric by a 6-way weaving loop, among which When weaving, the first and fourth roads use 75D-72f-Ordinary PET DTY (made by Toray Synthetic Fiber (Nantong) Co., Ltd.) to form the surface layer in full circle, and the third and sixth channels use 60D-24f-PBT DTY (CR). The value is 49%, made by Toray Synthetic Fiber (Nantong) Co., Ltd.), and the inner layer is formed in full circle. The second and fifth channels are selected from 75D-72f-normal PET DTY (Dongli Synthetic Fiber (Nantong) Co., Ltd.) The two layers in the watch are connected in a tuck on the dial and the syringe, and the rest are the same as in the first embodiment to obtain a knitted fabric. The specific properties are shown in Table 1.

[Comparative Example 2]

When weaving, the first, third, fifth, seventh, and ninth roads are all looped on the dial to form a surface layer; the second, fourth, and sixth paths on the needle cylinder are connected to the third layer of the watch. And forming a mesh of the inner layer; the sixth needle tuck on the dial in the 8th, 10th, and 12th roads is connected to the two layers in the table and forming the mesh of the next loop, and the rest is the same as in the first embodiment, and the knitting is obtained. Fabric. The specific performance is shown in Table 1.

[Comparative Example 3]

When weaving, weaving is carried out with 8 lanes as a weaving loop. All the needles on the dials of the 1st, 3rd, 5th, and 7th roads are formed into a surface layer, and the third in the first and third roads on the needle cylinder. 4 needles form a recess in the inner layer, and the first and second needles on the cylinder in the 5th and 7th loops form a circle, forming a recess of the next loop, and the 1st and 4th roads are the first on the cylinder. 2 needles are looped, 3rd and 4th needles are floating lines to form the convex part of the inner layer; in the 6th and 8th roads, the first and second needles are floating lines on the needle cylinder, and the third and fourth needles are looped to form the next one. The convex portion of the loop is the same as in the first embodiment, and a knitted fabric is obtained. The specific performance is shown in Table 1.

[Comparative Example 4]

When weaving, the 48-way weaving loop is used for weaving. All the odd-numbered roads are formed into a surface layer on the dial, and the odd-numbered roads in the 1st to 24th roads are formed in the 13th to 21st stitches on the needle cylinder. The recess in the inner layer; the odd road in the 25th to 48th roads The first to the ninth stitches on the cylinder form a circle to form the concave portion of the next loop; in the first to the 24th roads, the first to the 12th stitches of the even-numbered roads on the cylinder are looped, and the 13th to 21st stitches are float lines. The convex portion of the layer; in the 25th to 48th channels, the 1st to 9th stitches on the even tube on the syringe are float lines, and the 10th to 21st stitches are looped to form the convex portion of the next loop, and the rest is the same as in the first embodiment. Knitted fabric. The specific performance is shown in Table 1.

In the above table,

(1) It can be seen from the third embodiment and the first embodiment that under the same conditions, the knitted fabric of the convex portion unit having five stitches in the lateral direction and the knitted fabric having the convex portion unit having three stitches in the lateral direction are higher in the convex portion of the former. More than the latter, the former has a lower water retention rate than the latter, and the surface water retention ratio is higher than the latter, so the former has better water absorption and quick drying than the latter.

(2) It can be seen from Example 3 and Example 7 that under the same conditions, the knitted fabric of the PBT fiber having the convex portion of 49% of the CR value is compared with the knitted fabric of the PBT fiber having the convex portion of 35% of the CR value. The height of the convex portion is larger than that of the latter, and the water retention rate of the inner layer of the former is lower than that of the latter, and the water retention ratio of the surface is higher than that of the latter, so that the former has better water absorption and quick drying than the latter.

(3) It can be seen from Example 10 and Example 4, from Example 11 and Example 5, and from Example 12 and Example 6, under the same conditions, the knitted fabric and the concave portion using the hydrophobic yarn in the concave portion are hydrophilic. Compared with the knitted fabric of the yarn, the height of the convex portion of the yarn is equivalent, but the former has a lower water retention ratio than the latter, and the water retention ratio in the surface is higher than the latter, so the former has better water absorption and quick drying than the latter.

(4) It can be seen from Example 3 and Example 8 that under the same conditions, the knitted fabric in which the convex portion fiber is PBT and the knitted fabric in which the convex portion fiber is ordinary PET are larger than the latter in the former, and the former The water retention rate of the inner layer is lower than that of the latter, and the water retention ratio in the surface is higher than that of the latter, so the former has better water absorption and quick drying than the latter.

(5) In Example 1 and Example 13, Example 1 and Example 14, it can be seen that under the same conditions, the knitted fabric and the convex unit having three coils in the lateral direction and the longitudinal direction of the convex unit have only one direction of three. Compared with the knitted fabric of the coil, the height of the convex portion of the coil is equivalent, but the water retention rate of the inner layer of the former is lower than that of the latter, and the water retention ratio of the surface is higher than that of the latter, so that the former has better water absorption and quick drying than the latter.

(6) It can be seen from Embodiment 3 and Embodiment 15 that the height of the convex portion under the same conditions Compared with the knitted fabric with a convex height of 0.30 mm, the knitted fabric of 0.40 mm has a lower water retention ratio than the latter, and the water retention ratio of the front is higher than that of the latter. Therefore, the former has better water absorption and quick drying than the latter.

(7) It can be seen from Example 3 and Example 16 that under the same conditions, the knitted fabric of the PBT fiber having the convex portion of 60D and the knitted fabric of the PBT fiber having the convex portion of 30D are the height of the convex portion of the former. The latter is larger than the latter, while the former has a lower water retention rate than the latter, and the surface water retention ratio is higher than the latter, so the former has better water absorption and quick drying than the latter; and the former has better anti-hooking properties than the latter.

(8) In Example 3 and Example 17, it can be seen that, under the same conditions, the knitted fabric of the PBT fiber having the convex portion of 60D and the knitted fabric of the PBT fiber having the convexity of 250D are larger than the knitted fabric of the PBT having the fineness of 250D. The latter, while the former has a lower water retention rate than the latter, and the surface water retention ratio is higher than the latter, so the former has better water absorption and quick drying than the latter; and the former has better elastic properties than the latter.

(9) It can be seen from Example 10 and Example 18 that, under the same conditions, the fabric of the PBT/PET of the convex portion fiber is slightly smaller than the latter with the fabric of the PBT, and the inner layer of the former is the same. The water retention rate is slightly higher than the latter, and the water retention ratio in the surface is slightly lower than that of the latter, so the former has a slightly faster water absorption and quick drying than the latter; however, the former has better anti-hook performance than the latter.

(10) It can be seen from Comparative Example 1 and Example 1 that, under the same conditions, the knitted fabric formed by the connection pattern of the full-collection ring has no concave-convex structure compared with the knitted fabric formed by the full-loop connection method, and the former The water retention rate of the inner layer is higher than that of the latter, and the water retention ratio in the surface is much lower than that of the latter. Therefore, the water absorption and quick drying property of the former is far less than that of the latter.

(11) It can be seen from Comparative Example 2 and Example 1 that under the same conditions, the needle formed by the connection of the surface layer loop and the inner layer loop is formed by the connection of the full loop. Compared with the woven fabric, the former does not form a concave-convex structure, and the former has a higher water retention rate than the latter, and the water retention ratio in the surface is much lower than the latter, so the former has a water absorption and quick drying property far less than the latter.

(12) It can be seen from Comparative Example 3 and Example 1 that, under the same conditions, the knitted fabric of the convex unit in both the longitudinal direction and the longitudinal direction is compared with the knitted fabric in which the convex unit is three stitches in the longitudinal direction and the longitudinal direction, The height of the convex part is equivalent, but the former has a higher water retention rate than the latter, and the water retention ratio in the surface is much lower than the latter, so the former has much faster water absorption and quick drying than the latter.

(13) It can be seen from Comparative Example 4 and Example 1 that, under the same conditions, the knitted fabric in which the convex unit is 12 stitches in the longitudinal direction and the knitted fabric in which the convex unit is three stitches in the longitudinal direction and the longitudinal direction is the former. The height of the convex part is larger than the latter, but the water retention rate of the inner layer of the former is higher than that of the latter, and the water retention ratio of the surface is much lower than that of the latter, so the former has a water absorption and quick drying property far less than the latter.

1‧‧‧ surface

2‧‧‧ inner layer

3‧‧‧The convex part of the inner layer

4‧‧‧ Inside the recess

A‧‧‧ Straight line tangent to the surface of two adjacent recesses

B‧‧‧ Straight line tangent to the surface of two adjacent convex parts

H‧‧‧ Height of the inner convex

Claims (7)

A double-knit fabric, characterized in that: the double-knit fabric comprises a surface layer and a inner layer, wherein the surface layer and the inner layer are connected in a loop form, the inner layer has a concave-convex structure, and each of the concave-convex structures At least one of the longitudinal and lateral directions of the convex unit is composed of 3 to 10 coils. The double-knit fabric of claim 1, wherein, in the uneven structure, the height of the convex unit is 0.05 to 0.40 mm. The double-knit fabric of claim 1 or 2, wherein, in the uneven structure, the fibers forming the convex unit are polyester-based elastic fibers. The double-knit fabric of claim 3, wherein the polyester-based elastic fiber is a side-by-side type composite fiber. The double-knit fabric of claim 3, wherein the polyester-based elastic fiber has a fineness of 50 to 200 denier. The double-knit fabric of claim 1 or 2, wherein the double-knit fabric further comprises a spandex bare yarn. The double-knit fabric of claim 1 or 2, wherein the double-knit fabric has a surface water retention ratio of 3.0 or more.