Weft-knitted polyester filled double-faced fabric and preparation method thereof

Abstract

The invention discloses weft-knitted polyester filled double-faced cloth and a preparation method thereof, and belongs to the technical field of spinning. The preparation method provided by the invention comprises the following working procedures in sequence: weaving, refining, drying, presetting, overlock, dyeing and shaping, in the refining process, the refining temperature ranges from 45 DEG C to 60 DEG C, and the refining time is shorter than 30 min. According to the preparation method provided by the invention, a drying step is set between refining and presetting, a dyeing step is set between presetting and dyeing, and the refining temperature and time are strictly controlled at the same time, so that the problems of a large number of creases and laddering of the obtained finished product are avoided. The method can be used for preparing the weft-knitted polyester-filled double-faced fabric which is free of wiredrawing and basically free of creases and takes the recycled yarn as the raw material.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textiles, and particularly relates to a weft-knitted polyester-filled double-faced fabric and a preparation method thereof. BACKGROUND

[0002] The raw material of the recycled yarn is widely sourced, which can come from textile scraps, from waste textiles, or from other renewable materials (such as plastic bottles). After reprocessing the waste materials into textiles, it has significant environmental advantages, which can reduce the pollution of waste textiles to the environment, reduce the dependence on virgin fiber resources, and at the same time, the production cost is relatively low. The use of recycled yarns conforms to the current concept of sustainable development.

[0003] Using 100% recycled yarns and cooperating with weft-knitting technology, a weft-knitted polyester-filled double-faced fabric can be woven, which is composed of two layers of fabric, called fabric surface, and filled with polyester fibers in the middle. It has good loftiness and warmth retention performance. However, due to its material and specific top-middle-bottom structure, the problem of polyester fibers running out of the upper and lower fabric surfaces and the problem of creases easily occurring in the upper and lower yarns during processing and in the final product. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a preparation method for solving the problems of fabric surface slivering and creases of a weft-knitted polyester-filled double-faced fabric prepared from 100% recycled yarns, and to provide a weft-knitted polyester-filled double-faced fabric prepared from 100% recycled yarns without slivering and with basically no creases.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a preparation method of a weft-knitted polyester-filled double-faced fabric, comprising the steps of weaving, refining, drying, pre-setting, locking, dyeing and setting in sequence. In the refining process, the temperature of refining is 45-60℃, and the time of refining is less than 30min.

[0006] The weft-knitted polyester-filled double-faced fabric is prepared from 100% recycled yarns.

[0007] The present application has the advantages that the preparation method provided by the present application sets the steps of drying between refining and pre-setting, and the step of locking between pre-setting and dyeing, and at the same time strictly controls the temperature and time of refining, which can avoid the problems of a large number of creases and slivering in the obtained product. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a physical picture of the comparative example of the present application; Figure 2 It is a physical picture of the example of the present application; Figure 3 Physical diagram of the comparative example of the specific embodiment of the present application; Figure 4 Physical diagram of the example of the specific embodiment of the present application. Specific embodiment

[0009] In order to explain the technical content, the achieved purposes and effects of the present application in detail, the following is explained in combination with the embodiments and the accompanying drawings.

[0010] A preparation method of a weft-knitted polyester filling double-faced fabric, comprising the steps of weaving, refining, drying, pre-setting, edge locking, dyeing and setting in sequence; In the refining process, the refining temperature is 45-60℃, and the refining time is less than 30 min. In the implementation process, the refining temperature can be specifically 45℃, 48℃, 50℃, 52℃, 55℃, 58℃ or 60℃, etc.

[0011] From the above description, the beneficial effects of the present application are as follows: unlike other types of fabrics, the weft-knitted polyester filling double-faced fabric will cause the internal filling to be misaligned and scattered after long-term stacking or scattered placement, which will lead to yarn pulling in the subsequent dyeing and setting processes, and the filling will lift the fabric surface to cause irreparable creases. The preparation method provided by the present application sets a drying step between refining and pre-setting, and the fabric surface is completely dried. Since hot water shrinking is performed in high-temperature hot water before pre-setting, the complete drying of the fabric surface can ensure that the temperature is consistent at each position during the hot water shrinking process, and the temperature inconsistency at different positions caused by excessive moisture content during subsequent overheating will be avoided, thereby achieving uniform heating, uniform shrinkage, avoiding the problem of poor setting based on uneven fabric surface tension, and significantly reducing the generation of wrinkles and the problem of creases in subsequent processing. The step of edge locking is set between pre-setting and dyeing to prevent the filling yarn from running out during the dyeing process, which will cause the problem of yarn pulling on the fabric surface. By strictly controlling the refining temperature and time, the problem of excessive shrinkage of the weft-knitted polyester filling double-faced fabric prepared by 100% reclaimed yarn during the refining process caused by excessively high refining temperature can be avoided, the shrinkage consistency in each direction of the fabric surface can be ensured, and the refining time can be reduced to prevent the crease problem caused by the misalignment and scattering of the internal filling of the fabric.

[0012] Further, the refining time is 3-20 min, which can be specifically 3 min, 4 min, 5 min, 8 min, 10 min, 12 min, 15 min, 18 min or 20 min, etc. in the implementation process; and the refining temperature is 48-60℃. Under the relatively low refining temperature, the weft-knitted polyester filling double-faced fabric obtained by 3-20 min of refining has the least creases.

[0013] In one or more embodiments, the oiling agent is added during the weaving process. During the spinning process, the oiling agent is directly applied to the fiber through a device such as an oil nozzle or a metering pump. The addition of the oiling agent can improve the lubricity of the fabric surface to reduce the yarn pulling.

[0014] In one or more embodiments, the temperature of the drying can be adjusted according to the equipment that can be added to the actual production line, with the purpose of ensuring that the fabric surface is completely dry. For example, if the drying is performed using hot air drying, the temperature of the drying is 140°C, and the machine speed is 20 m / min.

[0015] In one or more embodiments, the predetermined process includes a hot water shrinking step and a high-temperature presetting step performed in sequence. The hot water shrinking step is a step of passing the fabric through a tank of hot water before the setting machine, and the high-temperature presetting step is a step of performing high-temperature setting on the setting machine. Further, the temperature of the hot water is 85-100°C, and in the implementation process, it can be specifically 85°C, 90°C, 95°C, or 100°C, etc.; the temperature of the high-temperature setting is 180-195°C, and preferably 180-190°C, and in the implementation process, it can be specifically 180°C, 185°C, 190°C, or 195°C, etc.

[0016] As can be known from the above description, the fabric is first treated in hot water to produce shrinkage, and then high-temperature presetting is performed, which can make the fabric surface smoother and reduce the occurrence of fabric creases compared to directly entering the setting machine for high-temperature presetting.

[0017] In one or more embodiments, the edge locking is performed at both ends (head and tail) of the fabric. This prevents the filling yarn from running out during the dyeing process, causing the fabric to pull out. In one or more embodiments, a softening anti-wrinkle agent is added during the dyeing process. Further, a softening anti-wrinkle agent and a polyester lofting agent are added during the dyeing process. The softening anti-wrinkle agent is added first, then the polyester lofting agent is added, and then the temperature is increased to enter the fabric.

[0018] In one or more embodiments, during the setting process, the setting temperature is 120-150°C. At this time, the setting is the final setting. Depending on the function of the fabric to be prepared, corresponding auxiliaries can be added in this step. For example, moisture-wicking finishing agents, Yakosai, polyester lofting agents, etc. can be added.

[0019] In one or more embodiments, dehydration and spreading processes are performed sequentially between refining and drying, and between dyeing and setting. Specifically, a method for preparing a weft-knitted polyester-filled double-sided fabric includes the following sequential processes: weaving, refining, first dehydration, first spreading, drying, pre-setting, hemming, dyeing, second dehydration, second spreading, and setting. Dehydration removes most of the moisture, preventing excessive moisture from reducing processing efficiency and potentially avoiding other problems caused by uneven moisture distribution. Dehydration can remove excess moisture through mechanical extrusion (such as a roller) or centrifugal force (such as a dewatering machine). During processing, uneven tension, folding, and compression can cause wrinkles or distortion in the fabric. Spreading, through mechanical devices (such as spreading rollers or spreaders), can flatten and smooth the fabric, restoring its original width and shape, which is beneficial for subsequent processing and helps reduce crease formation.

[0020] In one or more embodiments, a mid-stage inspection process is included after the second dehydration. Mid-stage inspection refers to the operation of conducting intermediate inspections on the semi-finished fabric.

[0021] In one or more embodiments, after finalization, the process further includes sequential intermediate inspection, final packaging, and finished product warehousing.

[0022] In one or more embodiments, the raw material for the weft-knitted polyester-filled double-sided fabric is 100% recycled polyester yarn. Further, the filling yarn in the intermediate layer accounts for 45-54%, all percentages referring to weight ratio.

[0023] Embodiment 1 of the present invention is as follows: A method for preparing a weft-knitted polyester-filled double-sided fabric includes the following sequential steps: weaving, refining, first dehydration, first spreading, drying, pre-setting, edge locking, dyeing, second dehydration, first intermediate inspection, second spreading, setting, second intermediate inspection, final inspection, packaging, and warehousing.

[0024] The specific parameters for the processes of weaving, refining, drying, pre-setting, dyeing, and setting are as follows: 1.1 Weaving During the weaving process, nylon oil is applied to the fibers using a metering pump; The composition of the woven fabric is 150D / 144F (recycled polyester yarn) DTY41 (22%); 300D / 96F (recycled polyester yarn) DTY34 (54%); 75D / 72F (recycled polyester yarn) DTY24 (24%).

[0025] 1.2 Refining Process: 50℃, 10min; Auxiliaries: softening and anti-crease agent PERSOFTAL L02 2g / l; oil removal agent MFB 1g / l, polyester lofting agent 7006-5 1g / L; Machine parameters: nozzle 110, fabric lifting wheel speed 200m / min; Bath ratio: 1:13, water level about 10000L.

[0026] 1.3 Drying Process: temperature: 140℃, machine speed: 20m / min, air volume: upper air volume 65%, lower air volume 70%; 1.4 Pre-setting Hot water shrinkage: the fabric is first passed through hot water, one dip and one roll, and the hot water temperature is 90℃; High-temperature pre-setting: fan temperature 185℃, machine speed 20m / min, air volume: upper air volume 65%; lower air volume 70%.

[0027] 1.5 Dyeing Process: 133℃, 40min; specifically: 2℃ / min to 85℃, 1.5℃ / min to 110℃ for 10min, 1.5℃ / min to 133℃ for 40min, 1℃ / min to 75℃, sampling, 1.5℃ / min to 50℃, drainage, post-treatment; Machine parameters: nozzle opening 5, fabric lifting wheel speed 110m / min; Bath ratio: 1:13, water level about 10000L; Dyeing auxiliaries: softening and anti-crease agent PERSOFTAL L02 2g / L, lofting agent 7006-5 1g / L.

[0028] 1.6 Setting Process: temperature 130℃, machine speed 18m / min, upper air volume 70%, lower air volume 75%.

[0029] Embodiment two of the application is: On the basis of embodiment one, an auxiliary is added during setting, and the auxiliary includes moisture absorption and sweat releasing finishing agent SR-20000 0.8g / L, Yakase 65-L 1g / L, polyester lofting agent 7006-5 0.2g / L.

[0030] Embodiment three of the application is: The difference between embodiment three and embodiment one is as follows: 1.1 Weaving The composition of the woven fabric is 150D / 144F (recycled polyester yarn) DTY41 (26%); 300D / 96F (recycled polyester yarn) DTY34 (45%); and 75D / 72F (recycled polyester yarn) DTY24 (29%).

[0031] 1.6 Setting Process: temperature 125℃, machine speed 18m / min, air volume 80% up, 85% down.

[0032] Embodiment four of the present application is: Embodiment four differs from embodiment one in the following different processes: 1.2 Refining Process: 48℃, 20min; Auxiliaries: soft anti-wrinkle agent PERSOFTAL L02 2g / l; oil removal agent MFB 1g / l, polyester lofting agent 7006-5 1g / L; Machine parameters: nozzle 110, fabric lifting wheel speed 200m / min; Bath ratio: 1:13, water level about 10000L.

[0033] 1.4 Pre-setting Hot water shrinkage: the fabric is first passed through hot water, one dip and one roll, and the hot water temperature is 85℃; High temperature pre-setting: fan temperature 192℃, machine speed 20m / min, air volume: air volume up 65%; air volume down 70%.

[0034] Embodiment five of the present application is: Embodiment five differs from embodiment one in the following different processes: 1.2 Refining Process: 60℃, 10min; Auxiliaries: soft anti-wrinkle agent PERSOFTAL L02 2g / l; oil removal agent MFB 1g / l, polyester lofting agent 7006-5 1g / L; Machine parameters: nozzle 110, fabric lifting wheel speed 200m / min; Bath ratio: 1:13, water level about 10000L.

[0035] 1.4 Pre-setting Hot water shrinkage: the fabric is first passed through hot water, one dip and one roll, and the hot water temperature is 95℃; High temperature pre-setting: fan temperature 180℃, machine speed 20m / min, air volume: air volume up 65%; air volume down 70%.

[0036] Embodiment six of the present application is: Embodiment six differs from embodiment one in the following different processes: 1.2 Refining Process: 55℃, 15min; Auxiliary: Softening and anti-wrinkle agent PERSOFTAL L02 2g / l; oil removing agent MFB 1g / l, polyester lofting agent 7006-5 1g / L; Machine parameters: nozzle 110, fabric lifting wheel speed 200m / min; Bath ratio: 1:13, water level about 10000L.

[0037] 1.4 Pre-setting Hot water shrinkage: the fabric is first passed through hot water, one dip and one roll, and the hot water temperature is 100℃; High temperature pre-setting: fan temperature 188℃, machine speed 20m / min, air volume: upper air volume 65%; lower air volume 70%.

[0038] 1.6 Setting Process: temperature 150℃, machine speed 18m / min, upper air volume 80%, lower air volume 85%.

[0039] Comparative Example 1: The difference between Comparative Example 1 and Example 1 is only in the refining temperature, which is 80℃, 10min.

[0040] Comparative Example 2: The difference between Comparative Example 2 and Example 1 is only that the process of overlock is not included.

[0041] The weft-knitted polyester filling double-faced fabric obtained in Example 1 is shown in Figure 2 and Figure 4 The weft-knitted polyester filling double-faced fabric obtained in Comparative Example 2 is shown in Figure 1 The weft-knitted polyester filling double-faced fabric obtained in Comparative Example 1 is shown in Figure 3 It can be seen that the fabric surface of Example 1 is free of yarn pulling and flat. The fabric surface of Comparative Example 1 produces fine creases. The fabric surface of Comparative Example 2 produces more yarn pulling.

[0042] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent transformation or direct or indirect application in related technical fields based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A method for preparing a weft-knitted polyester-stuffed double-faced cloth, characterized by, The process comprises the following steps in sequence: weaving, refining, drying, pre-setting, edge locking, dyeing and setting; In the refining process, the refining temperature is 45-60 DEG C, and the refining time is less than 30 min.

2. The production method according to claim 1, characterized by, In the weaving process, polyester oil is added.

3. The production method according to claim 1, characterized by, The pre-setting process comprises the following steps in sequence: hot water shrinking and high temperature pre-setting.

4. The production method according to claim 1, characterized by, The high temperature pre-setting temperature is 180-195 DEG C.

5. The preparation method according to claim 1, characterized in that, In the dyeing process, soft anti-wrinkle agent is added.

6. The method of claim 1, wherein, In the setting process, the setting temperature is 120-150 DEG C.

7. The preparation method according to claim 1, characterized in that, Between the refining and drying, the process further comprises the following steps in sequence: dehydrating and spreading.

8. The method of claim 1, wherein, Between the dyeing and setting, the process further comprises the following steps in sequence: dehydrating and spreading.

9. The method of claim 1, wherein, The raw material of the weft-knitted polyester filling double-faced fabric is 100% polyester recycled yarn.

10. A weft-knitted polyester filling double-faced fabric prepared by the method of any one of claims 1-9.

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