Anti-laddering knitted fabric

Abstract

The present application discloses a kind of knitted fabric of anti-falling apart.The knitted fabric includes yarn A and yarn B, wherein, yarn A is non-polyurethane fiber, the length of the loop of yarn A and yarn B is La, Lb respectively, when yarn B is high-temperature polyurethane fiber, La, Lb satisfy the following relationship: 2.0 < La / Lb < 3.0;When yarn B is non-polyurethane fiber, La, Lb satisfy the following relationship: La / Lb < 1.00.

Description

TECHNICAL FIELD

[0001] The present application relates to a knitted fabric, in particular to a knitted fabric with anti-linting effect. BACKGROUND

[0002] At present, in the process of sewing into clothes, in order to prevent the lints of collar, cuff and foot from being scattered, generally, double-locking edge treatment is carried out on these parts. However, for some thicker fabrics, double-locking edge sewing is more difficult, the production efficiency is low, and the sewing thread will produce strong friction and irritation to the skin, affecting the wearability.

[0003] In order to overcome the above problems, people have carried out a lot of research. For example, Chinese patent document CN105133162A discloses a low-temperature Lycra double-sided knitted fabric, which feeds low-temperature Lycra yarn and textile fiber yarn into a mixed yarn at the same time, knits rib or double-rib structure, and the mixed yarns are mutually soluble and bonded, so that the fabric can be cut arbitrarily, the edge will not be scattered, the manufacturing cost is low, and the whole is flat and beautiful. However, after being washed and exposed to sunlight for many times, the performance of low-temperature Lycra decreases, the bonding points are easy to fall off, and the anti-linting durability needs to be further improved.

[0004] For example, Chinese patent document CN108866777A discloses a double-layer air layer pure separation random cutting fabric, which is knitted by 20D Japanese Asahi Kasei spandex and 40S / 1 Japanese Toyobo acrylic yarn on the upper and lower layers. The upper and lower layers are connected by spandex yarn, and the unique lock eye structure can not only achieve random cutting, but also solve the problem of edge curling after cutting. It is environmentally friendly and hygienic, but the loops in the upper and lower layers still have the possibility of falling off.

[0005] For example, Japanese patent document WO2009 / 011440 discloses a double-sided knitted fabric with anti-linting and anti-curling effect and a preparation method thereof. Non-elastic yarn and elastic yarn (polyurethane fiber) with a thermal deformation starting temperature of 150-190℃ are fed into a double-sided machine to knit together. The fineness ratio between the elastic yarn and the non-elastic yarn is 1:0.3-1:3.0, the warp density and weft density of the double-sided knitted fabric with elongation of 180% or more and elongation recovery rate of 92% or more are 5000 / inch2 or more, no edge sewing is needed, and the occurrence of linting and curling can be prevented. However, after being washed and exposed to sunlight for many times, the polyurethane fiber ages, and the anti-linting effect is weakened. SUMMARY

[0006] In view of the above problems, the purpose of the present application is to provide a knitted fabric which can be cut freely without using low-temperature melting spandex and has excellent anti-linting effect.

[0007] The technical solution of the present application is:

[0008] The present invention is a run-resistant knitted fabric comprising yarn A and yarn B, wherein yarn A is a non-polyurethane fiber, and the stitch length of yarn A and yarn B is La and Lb, respectively, characterized in that when yarn B is a high-temperature polyurethane fiber, La and Lb satisfy the following relationship: 2.0 < La / Lb < 3.0; and when yarn B is a non-polyurethane fiber, La and Lb satisfy the following relationship: La / Lb < 1.00.

[0009] The present invention controls the stitch length between yarn A and yarn B, so that the stitches of yarn B are locked and tightened by yarn A, and excellent run resistance is achieved even without using low-temperature spandex. DETAILED DESCRIPTION

[0010] The present invention is a run-resistant knitted fabric comprising yarn A and yarn B. Yarn A is a non-polyurethane fiber, and the type is not particularly limited, such as a polyester fiber, a polyamide fiber, or the like. Among them, the polyester fiber can be exemplified by polyethylene terephthalate fiber (PET), polybutylene terephthalate elastic fiber (PBT), polytrimethylene terephthalate elastic fiber (PTT), polybutylene terephthalate / polyethylene terephthalate composite fiber (PBT / PET), or polytrimethylene terephthalate / polyethylene terephthalate (PTT / PET) composite fiber, or the like. The polyamide fiber can be exemplified by polyamide 6 (NY6), polyamide 66 (NY66), or the like. In consideration of the dimensional stability of the knitted fabric, yarn A is preferably a yarn having a boiling water shrinkage of 20% or more or a yarn having a stretch recovery rate of 20% or more, so that the stitches of yarn B can be locked by yarn A, and the dimensional stability of the knitted fabric can be improved. Yarn A is more preferably a yarn having a boiling water shrinkage of 25% to 45% or a yarn having a stretch recovery rate of 25% to 50%.

[0011] The stitch length in the present invention refers to the length of 100 stitches in the transverse direction of the knitted fabric in a free and tension-free state, and the yarn A and yarn B are pulled out and gently straightened until the stitch shape formed by knitting is no longer visible.

[0012] The run resistance in the present invention refers to the phenomenon that the knitted fabric is longitudinally deknitted after cutting and washing and drying in the transverse direction (90°) and the diagonal direction (45°) of the knitted fabric in the knitting direction and the reverse knitting direction, respectively.

[0013] In the present invention, the ratio between the stitch length La of yarn A and the stitch length Lb of yarn B is crucial to the run resistance of the knitted fabric.

[0014] When the yarn B is a high-temperature polyurethane fiber (high-temperature PU) and La / Lb is less than or equal to 2.0, the space between the loops formed by the yarn A is large, and when a slight tension is applied to both sides in the width direction, the loops between the non-polyurethane fibers will be off the hook; when La / Lb is greater than or equal to 3.0, the length of the yarn B is too short, and at this time, problems such as knitting difficulty and holes will occur. Therefore, when the yarn B is a high-temperature polyurethane fiber, the present application requires that La and Lb satisfy the following relationship: 2.0 < La / Lb < 3.0, so that the loops formed by the yarn A can lock the yarn B and achieve the purpose of preventing the yarn from being scattered, and at the same time, problems such as knitting difficulty caused by the shortness of the yarn B will not occur. Preferably, 2.0 < La / Lb < 2.5; more preferably, 2.1 ≤ La / Lb ≤ 2.4.

[0015] In the present application, the high-temperature PU fiber refers to a PU fiber that melts at a temperature exceeding 190°C; and the low-temperature PU fiber refers to a PU fiber that melts at a temperature greater than or equal to 130°C and less than or equal to 190°C.

[0016] When the yarn B is a non-polyurethane fiber, La / Lb < 1.00, that is, the length of the loop A is less than that of the yarn B, and when there is a tension in the transverse direction, the loop A is stretched to a nearly straight state, and the loop B is not easy to escape from the yarn A, thereby realizing that the fabric does not scatter. When the length of the loop A is greater than or equal to that of the yarn B, the space between the yarn A and the loop B is large, and when a slight tension is applied in the transverse direction, the fabric will scatter. Preferably, La / Lb < 0.90; more preferably, La / Lb ≤ 0.70. The non-polyurethane fiber herein is not particularly limited, and examples thereof include cotton, modal, ordinary polyester, ordinary polyamide, etc. Of course, the same type of yarn as the yarn A can also be selected, such as a yarn having a boiling water shrinkage of more than 20% or a yarn having a stretch recovery rate of more than 20%.

[0017] As preferred, the total denier of the yarn A in the present application is 10-100 denier (D). More preferably, the total denier of the yarn A is 20-75 D.

[0018] In the present application, the weave is not particularly limited and can be single-sided or double-sided. Examples of the single-sided weave include single jersey and rib, and examples of the double-sided weave include cotton wool weave.

[0019] When the fabric is a single-sided weave, the yarn A and the yarn B are 1:1 full loops, or the yarn A is a loop-float and the yarn B is a full loop, the course row where the yarn A is located is adjacent to the course row where the yarn B is located, and the loop formed by the yarn A locks the yarn B adjacent thereto to achieve the purpose of not scattering. When the yarn A and the yarn B are fed in at the same time, the yarn A can lock the loop hooked with it, and the purpose of not scattering can also be achieved.

[0020] In the present application, when the yarn A is knitted with other yarns, not only the position of the single loop of the yarn A is considered, but also the position of the yarn A in the whole knitted fabric is considered. In the present application, it is preferred that at least one course of the 5 courses of loops of the knitted fabric is formed by the yarn A.

[0021] In the present application, in addition to the yarn A and the yarn B, a yarn C can be selected as needed, and the type of the yarn C is not particularly limited and can be selected as needed.

[0022] The knitted fabric of the present application can be used to make T-shirts, underwear, trousers, coats, and the like.

[0023] The various physical parameters involved in the present application are tested and obtained by the following methods.

[0024] (1) Anti-run-off property

[0025] A test swatch of 5.5 cm in width and 40 cm in length is cut from the fabric, 2 cuts of 3 cm are made on the side of the reverse knitting direction at an angle of 45°, and 3 cuts of 3 cm are made on the side of the forward knitting direction at an angle of 45°, the left and right ends of the swatch are sewn together, after washing according to the method of JIS L 0217 103:1995, dehydration and drying, the damage to the cut part of the swatch is evaluated. The damage to the cut part is evaluated according to the number and length of the fiber shedding and cracking at the cut part. The appearance damage is evaluated according to the following 10 grades, 7 or less is qualified, and 8 or more is unqualified. The transverse direction (90°) and the diagonal direction (45°) of the same swatch are determined, and the average value of the evaluation of the 5 cuts (transverse direction (90°) and diagonal direction (45°)) on one swatch is taken. According to the same method, the average value of the determination of 5 swatches is taken as the anti-run-off property index of the present application.

[0026] <evaluation criteria>

[0027] 10: only 1 run-off, and the length is more than 2 mm

[0028] 9: only 1 run-off, and the length is 1-2 mm

[0029] 8: more than 10 run-offs with a length of more than 0.8 mm but less than 1 mm

[0030] 7: 7-9 run-offs with a length of more than 0.8 mm but less than 1 mm

[0031] 6: 4-6 run-offs with a length of more than 0.8 mm but less than 1 mm

[0032] 5: less than 3 run-offs with a length of more than 0.8 mm but less than 1 mm

[0033] 4: only 1 break, and the length is more than 0.6 mm but less than 0.8 mm

[0034] 3: only 1 break, and the length is more than 0.3 mm but less than 0.6 mm

[0035] 2: only 1 break, and the length is less than 0.3 mm

[0036] 1: no break.

[0037] (6) Boiling water shrinkage

[0038] (a) The yarn sample is taken, 10 turns x 1 m / turn, and the yarn sample is hung naturally in a temperature of 25°C and humidity of 60% for 12 hours for conditioning;

[0039] (b) The yarn sample is hung with a fixed weight G on the length measuring table, and the original length L is measured. The fixed weight G = D x 0.9 x 0.1 x turns x 2 (D: yarn fineness denier);

[0040] (c) The yarn sample with the measured original length is wrapped with gauze and placed in water at 100°C for 30 min, and the water temperature is kept at 100°C;

[0041] (d) The gauze and yarn sample are naturally cooled, and then the yarn sample is taken out and hung in a temperature of 25°C and humidity of 60% for 12 hours for conditioning;

[0042] (e) The conditioned yarn sample is hung with a fixed weight G, and L1 is measured. The boiling water shrinkage is calculated according to the following formula: boiling water shrinkage = (L-L1) / L x 100%;

[0043] (f) Three yarn samples are prepared and tested according to the above steps (a)-(e), and three groups of data are measured, and the average value is taken as the boiling water shrinkage of the present application.

[0044] (7) Stretch recovery rate

[0045] According to JIS L 1013:2010 Chemical fiber filament test method 8.12.

[0046] Example 1

[0047] On a 28G single-sided circular knitting machine, 30D / 12f high shrinkage PET (boiling water shrinkage rate of 35%) is selected as yarn A, and 30D / 24f PBT / PET (stretching recovery rate of 25%) is selected as yarn B for knitting, 4 paths are a cycle organization, yarn A is in the even path, and yarn B is in the odd path. The knitting action is: the 1st and 3rd paths: loop-loop, the 2nd path: loop-float, and the 4th path: float-loop. The length of yarn A is 105mm / 100w, and the length of yarn B is 165mm / 100w, to obtain a gray fabric. Then the gray fabric is pretreated (refining agent 1g / L, temperature 90℃*20 minutes), dyed (130℃*30 minutes), and finally finished and shaped (170℃*90 seconds) to obtain the knitted fabric of the application. Details are shown in Table 1.

[0048] Example 2

[0049] 30D / 24f high shrinkage PET (boiling water shrinkage rate of 35%) is selected as yarn A, and 20D high temperature PU bare silk is selected as yarn B. 1 path is a cycle organization, yarn A and yarn B are fed in at the same time, and yarn B is on top, and the knitting action is loop-loop. The length of yarn A is 170mm / 100w, and the length of yarn B is 70mm / 100w, and the rest is the same as Example 1, to obtain the knitted fabric of the application, details are shown in Table 1.

[0050] Example 3

[0051] 30D / 24f PBT / PET (stretching recovery rate of 25%) is selected as yarn A, and 100D / 36f ordinary PET DTY (boiling water shrinkage rate of 5%) is selected as yarn B. 1 path is a cycle organization, yarn A and yarn B are fed in at the same time, and yarn A is on top, and the knitting action is loop-loop. The length of yarn A is 175mm / 100w, and the length of yarn B is 185mm / 100w, and the rest is the same as Example 2, to obtain the knitted fabric of the application, details are shown in Table 1.

[0052] Example 4

[0053] 75D / 24f high shrinkage PET (boiling water shrinkage rate of 30%) is selected as yarn A, and 100D / 36f ordinary PET DTY (boiling water shrinkage rate of 5%) is selected as yarn B. 2 paths are a cycle organization, yarn A is in the odd path, and the knitting action on the front and back is float-loop; yarn B is in the even path, and the knitting action on the front and back is loop-float. The length of yarn A is 200mm / 100w, and the length of yarn B is 210mm / 100w, and the rest is the same as Example 1, to obtain the knitted fabric of the application, details are shown in Table 1.

[0054] Example 5

[0055] PBT / PET (stretch recovery rate of 23%) of 50D / 48f is selected as yarn A, and common PET DTY (boiling water shrinkage of 5%) of 100D / 36f is selected as yarn B. Route 1 is a circular organization, yarn A and yarn B are fed in at the same time, yarn B is on top, and the knitting action is loop-loop. The length of yarn A is 190mm / 100w, the length of yarn B is 210mm / 100w, and the rest is the same as example 2, to obtain the knitted fabric of the application, as shown in Table 1.

[0056] Example 6

[0057] High shrinkage PET (boiling water shrinkage of 30%) of 75D / 24f is selected as yarn A, and high temperature PU bare yarn of 40D is selected as yarn B. Route 1 is a circular organization, yarn A and yarn B are fed in at the same time, yarn B is on top, and the knitting action is loop-loop. The length of yarn A is 210mm / 100w, the length of yarn B is 100mm / 100w, and the rest is the same as example 2, to obtain the knitted fabric of the application, as shown in Table 1.

[0058] Example 7

[0059] NY (boiling water shrinkage of 40%) of 40D / 24f is selected as yarn A, high temperature PU bare yarn of 20D is selected as yarn B, and Modal of 60 English is selected as yarn C. Route 2 is a circular organization, yarn A is in odd-numbered routes, and the knitting action is loop-loop; yarn B and yarn C are fed in at the same time in even-numbered routes, and the knitting action is loop-loop. The length of yarn A is 180mm / 100w, the length of yarn B and yarn C is 80mm / 100w, and the rest is the same as example 2, to obtain the knitted fabric of the application, as shown in Table 1.

[0060] Example 8

[0061] NY (boiling water shrinkage of 45%) of 20D / 24f is selected as yarn A, and NY (boiling water shrinkage of 45%) of 40D / 34f is selected as yarn B. Route 4 is a circular organization, yarn A is in even-numbered routes, and the knitting action is loop-loop in the 2nd route and float-loop in the 4th route; yarn B is in odd-numbered routes, and the knitting action is loop-loop in routes 1 and 3. The length of yarn A is 95mm / 100w, the length of yarn B is 135mm / 100w, and the rest is the same as example 2, to obtain the knitted fabric of the application, as shown in Table 1.

[0062] Example 9

[0063] Select 40D / 24f NY (boiling water shrinkage of 40%) as yarn A, 20D high temperature PU bare silk as yarn B, 60 English Modal as yarn C, 4 paths for a cycle organization, yarn A in the first path, and the knitting actions are all loop-float; yarn B in the third path, and the knitting action is loop-loop; yarn C in the second and fourth paths, and the knitting actions are all loop-loop. The length of yarn A is 180mm / 100w, the length of yarn B and yarn C is 80mm / 100w, and the rest is the same as example 7, to obtain the knitted fabric of the application, as shown in Table 1.

[0064] Example 10

[0065] Select 30D / 12f high shrinkage PET (boiling water shrinkage of 35%) as yarn A, 30D / 24f PBT / PET (stretch recovery rate of 25%) as yarn B for knitting, 6 paths for a cycle organization, yarn A in the sixth path, and the knitting actions are all loop-float; yarn B in the first to fifth paths, and the knitting actions are all loop-loop. The length of yarn A is 105mm / 100w, the length of yarn B is 165mm / 100w, to obtain the gray cloth. The rest is the same as example 1, to obtain the knitted fabric of the application. As shown in Table 1.

[0066] Example 11

[0067] Select 75D / 24f ordinary PET (boiling water shrinkage of 5%) as yarn A, 100D / 36f ordinary PET DTY (boiling water shrinkage of 5%) as yarn B. 2 paths for a cycle organization, yarn A in the odd path, and the knitting actions on the front and back are all float-loop; yarn B in the even path, and the knitting actions on the front and back are all loop-float. The length of yarn A is 200mm / 100w, the length of yarn B is 210mm / 100w, and the rest is the same as example 4, to obtain the knitted fabric of the application, as shown in Table 1.

[0068] Example 12

[0069] Select 120D / 72f high shrinkage PET (boiling water shrinkage of 30%) as yarn A, 100D / 36f ordinary PET DTY (boiling water shrinkage of 5%) as yarn B. 2 paths for a cycle organization, yarn A in the odd path, and the knitting actions on the front and back are all float-loop; yarn B in the even path, and the knitting actions on the front and back are all loop-float. The length of yarn A is 200mm / 100w, the length of yarn B is 210mm / 100w, and the rest is the same as example 1, to obtain the knitted fabric of the application, as shown in Table 1.

[0070] Comparative Example 1

[0071] On a 28G single-sided circular knitting machine, 30D / 12f high shrinkage PET (boiling water shrinkage rate of 35%) is selected as yarn A, and 30D / 24f PBT / PET is selected as yarn B (stretch recovery rate of 25%) for knitting. Four paths are a cycle organization, yarn A is in the even path, and yarn B is in the odd path. The knitting action is: the first and third paths: loop-loop, the second path: loop-float, and the fourth path: float-loop. The length of yarn A is 165mm / 100w, and the length of yarn B is 105mm / 100w, to obtain a gray cloth. The rest is the same as example 1, to obtain a knitted fabric. Details are shown in Table 1.

[0072] Comparative example 2

[0073] High shrinkage PET (boiling water shrinkage rate of 30%) of 75D / 24f is selected as yarn A, and high temperature PU bare silk of 40D is selected as yarn B. One path is a cycle organization, yarn A and yarn B are fed in at the same time, yarn B is on top, and the knitting action is loop-loop. The length of yarn A is 330mm / 100w, and the length of yarn B is 175mm / 100w, and the rest is the same as example 6, to obtain a knitted fabric, details are shown in Table 1.

[0074] Table 1

[0075]

[0076] According to the above table,

[0077] (1) As can be seen from example 1 and example 10, under the same conditions, the anti-splinting property of the knitted fabric formed by 2 columns of yarn A in every 5 columns is better than that of the knitted fabric without yarn A.

[0078] (2) As can be seen from example 7 and example 9, under the same conditions, the anti-splinting property of the knitted fabric with yarn A and yarn B in adjacent loop columns is better than that of the knitted fabric with yarn A and yarn B in interval loop columns.

[0079] (3) As can be seen from example 4 and example 11, under the same conditions, the anti-splinting property of the knitted fabric formed by yarn A with a boiling water shrinkage rate of 30% is better than that of the knitted fabric formed by yarn A with a boiling water shrinkage rate of 5%.

[0080] (4) As can be seen from example 4 and example 12, under the same conditions, the anti-splinting property of the knitted fabric formed by yarn A with a total fineness of 75D is better than that of the knitted fabric formed by yarn A with a total fineness of 120D.

[0081] (5) From Comparative Example 1 and Example 1, under the same conditions, the knitted fabric having La / Lb of 1.57 has a very poor anti-pilling property compared to the knitted fabric having La / Lb of 0.64.

[0082] (6) From Comparative Example 2 and Example 6, under the same conditions, the knitted fabric having La / Lb of 1.9 has a very poor anti-pilling property compared to the knitted fabric having La / Lb of 2.40.

Claims

1. A non-fraying knitted fabric, comprising yarn A and yarn B, wherein, The yarn A is a non-polyurethane fiber, and the loop lengths of yarn A and yarn B are La and Lb, respectively. The yarn B is characterized by the following relationship: when yarn B is a high-temperature polyurethane fiber, La and Lb satisfy the following formula: 2.0 < La / Lb < 3.0; when yarn B is a non-polyurethane fiber, La and Lb satisfy the following formula: La / Lb < 1.00; the knitted fabric is a weft-knitted fabric; the loop rows of yarn A are adjacent to or overlap with the loop rows of yarn B; and yarn A is a yarn with a boiling water shrinkage rate of 20% or higher, or a stretch recovery rate of 20% or higher.

2. The anti-fraying knitted fabric according to claim 1, characterized in that: In every five rows of loops of the knitted fabric, at least one row of loops is entirely formed by yarn A.

3. The anti-fraying knitted fabric according to claim 1, characterized in that: The total fineness of yarn A is 10 to 100 denier.

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