Single-layer knitted structure double-sided temperature-sensitive fabric and preparation method thereof

Abstract

The application discloses a single-layer knitted structure double-sided temperature sensing fabric and a preparation method thereof. The fabric is integrally knitted from the same yarn to form a single-layer structure, and forms a dense loop structure layer and an extended yarn segment structure layer in the thickness direction; the extended yarn segment structure layer is connected with the loop structure layer through embedded fiber network anchoring points formed in the knitting process, and forms a pile layer through raising processing. The structure makes the front and back sides of the fabric have different heat conduction characteristics. The application realizes the double-sided temperature sensing function in the single-layer structure, and has the advantages of stable structure, lightness, thinness and significant functional difference.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a single-layer knitted double-sided temperature-sensitive fabric and its preparation method. Background Technology

[0002] In the field of home textile technology, bed sheet sets are common bedding items, and their comfort and functionality directly affect the user experience. Existing fabrics mostly adopt a single structure or single function design, such as ordinary knitted fabrics, cooling fabrics, or brushed warm fabrics, whose functions are usually limited to a single temperature-sensing attribute.

[0003] Current double-sided functional fabrics are mainly achieved through a double-layer composite structure, which involves layering two different functional fabrics to create a double-sided effect. For example, a cooling fabric and a warming fabric are bonded together with an adhesive, so that one side has a cooling function and the other side has a warming function. There are also spliced ​​structures, where different fabrics are sewn together to create a double-sided effect. In addition, there are finishing processes that create functional differences between the two sides of the fabric, such as coating or napping one side.

[0004] While double-layer composite structures can achieve different functions on both sides, they suffer from drawbacks such as bulkiness and poor breathability. The adhesives between the composite layers can also affect the softness and breathability of the fabric. Patchwork structures, on the other hand, present discomfort at the seams, are prone to friction, and have durability issues, with seams easily coming undone after repeated washing.

[0005] Secondly, in the field of knitted fabrics, the extended yarn segment structure is a common weave structure. On a knitting machine with a needle selection function, some needles are temporarily not involved in knitting. The yarn passing over these stationary needles attaches as floats to the back of the fabric or in the interlayer, forming the color source or visual pattern of the design, thus creating patterns or adjusting fabric properties. Raising the extended yarn segments to form a pile layer can enable this type of fabric to achieve double-sided temperature sensitivity. However, this method has the following problems: the extended yarn segments are prone to over-extraction or breakage during the raising process, resulting in uneven pile distribution. More seriously, during use or washing, the freely suspended floats are prone to migration, detachment, or breakage, leading to fabric structural deformation, performance degradation, and a gradual loss of the double-sided temperature sensitivity function.

[0006] Therefore, for double-sided temperature-sensitive fabrics, existing technologies either have complex or heavy structures that affect softness and breathability, or limited functional differences and insufficient durability, failing to meet users' needs for high-quality double-sided functional fabrics. Summary of the Invention

[0007] This application provides a single-layer knitted double-sided temperature-sensitive fabric and its preparation method, which solves the technical problems of existing double-sided temperature-sensitive fabrics, such as either having a heavy and complex structure, poor softness and breathability, or limited temperature sensitivity and poor durability.

[0008] Technical solution

[0009] According to one aspect of this application, a single-layer knitted double-sided temperature-sensitive fabric and its preparation method are provided. The fabric is integrally knitted from yarn, and its structure includes a dense loop layer and an extended yarn segment layer located on one side of the dense loop layer.

[0010] The extended yarn segment layer includes a plurality of extended yarn segments, at least one of the extended yarn segments passing through at least one loop in the dense loop layer and forming an anchor point.

[0011] Preferably, at least 30% of the yarn in the extended yarn segment layer is located in the dense loop layer.

[0012] Preferably, there are at least 50-200 anchor points per square centimeter of the fabric.

[0013] Preferably, in a unit area, the yarns of the extended yarn segments in the fabric account for 30%-60% of the total yarns in the corresponding area.

[0014] Preferably, the surface of the extended yarn segment layer has a nap.

[0015] A second aspect of this application provides a method for preparing a single-layer knitted double-sided temperature-sensitive fabric, comprising:

[0016] Asymmetric single-layer structure weaving is carried out using a double-cylinder circular knitting machine, wherein: the pressure depth of the loop forming needle is set to D1, so that the loop forming needle forms short and complete loops during the knitting process, forming a dense loop structure layer;

[0017] The pressing depth of the floating needle is set to D2, where D1 is less than D2; in each knitting cycle, the floating needle hangs the yarn only near the hook of the floating needle during the knitting process to form a longer yarn picking path, thereby forming an extended yarn segment.

[0018] The float needle is reset by a first phase angle ahead of its standard reset time, so that the extended yarn segment hanging on the hook of the float needle slips off the hook of the float needle before the needle tongue of the float needle closes and falls into the gap between the looping needle and the float needle.

[0019] The opening time of the loop forming needle's latch is delayed by a second phase angle relative to its standard opening time, so that the loop forming needle opens its latch when it moves to the height of the gap, exposing the lateral opening of the loop forming needle and allowing the extended yarn segment to slide laterally into the hook of the loop forming needle.

[0020] The looping needle bends the yarn to form a new loop, and during the forming process of the new loop, the extended yarn segment that has entered its needle hook is wrapped in its own yarn body to form an embedded anchor point.

[0021] Preferably, in the method for preparing a single-layer knitted double-sided temperature-sensitive fabric, D1 is 1.0mm to 1.5mm and D2 is 2.5mm to 3.0mm.

[0022] Preferably, in the method for preparing a single-layer knitted double-sided temperature-sensitive fabric, the first phase angle is a 10° to 20° main axis rotation angle, and the second phase angle is a 10° to 20° main axis rotation angle.

[0023] Preferably, in the method for preparing a single-layer knitted double-sided temperature-sensitive fabric, the method further includes:

[0024] Within a 30° phase before the float needle begins to reset, the yarn feeding tension on the extended yarn side is reduced from a first tension value to a second tension value and maintained.

[0025] Within a 5° to 15° phase before the looping needle tongue opens, the yarn feeding tension on the extended yarn side is increased from the second tension value to the third tension value;

[0026] The third tension value is greater than the first tension value.

[0027] Preferably, in the method for preparing a single-layer knitted double-sided temperature-sensitive fabric, the method further includes:

[0028] The extended yarn segments in the woven fabric are treated with a napping process.

[0029] The fabric that has undergone napping is then set.

[0030] Beneficial effects

[0031] In this embodiment, a single-layer knitted double-sided temperature-sensitive fabric and its preparation method are employed. The fabric is woven by designing an integrally knitted single-layer structure and adjusting the knitting process. The single-layer structure includes a dense looped structure layer and an extended yarn segment layer in the thickness direction. The extended yarn segments in the extended yarn segment layer are not freely suspended, but rather form a three-dimensional embedded connection structure with the dense looped structure layer through multiple embedded fiber network anchor points. This structure causes the float yarn to be constrained by the dense looped structure layer in the thickness direction, thereby achieving the technical effects of stable float yarn pilling, no pile migration, and stable double-sided temperature-sensitive effect. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 This is a structural schematic diagram of a single-layer knitted double-sided temperature-sensitive fabric according to an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the structure of the extended yarn segment according to an embodiment of this application;

[0035] Figure 3 This is a schematic diagram showing the anchoring of an extended yarn segment and a dense loop layer according to an embodiment of this application;

[0036] Figure 4 This is a comparative schematic diagram of the triangular configuration used in the preparation of the sample using a dual-cylinder circular needle machine according to the embodiments of this application and the standard triangular configuration;

[0037] Figure 5 This is a schematic diagram of the needle and thread movement process during the preparation of materials using a double-cylinder circular needle machine according to an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the timing relationship of a complete knitting cycle when using a double-cylinder circular knitting machine according to an embodiment of this application.

[0039] The meanings of the various reference numerals in the figure are as follows:

[0040] 1 dense coiled layer; 100 coiled coils;

[0041] Extended yarn segment layer 2, extended yarn segment 200, anchor point 201, pile 202. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] like Figure 1 As shown, an embodiment of the present invention provides a single-layer knitted double-sided temperature-sensitive fabric. The fabric is woven from yarn in one piece, and its structure includes an upper dense loop layer and an extended yarn segment layer located on one side of the dense loop layer.

[0046] The extended yarn segment layer includes a plurality of extended yarn segments, at least one of the extended yarn segments passing through at least one loop in the dense loop layer and forming an anchor point.

[0047] The above-mentioned fabric structure achieves different tactile sensations on both sides in a single layer, and there are anchoring points between the extended yarn segments and the dense looped layer, which makes the extended yarn segments more secure and evenly distributed, and the extended yarn segments are not easy to fall off during use and washing, which helps to obtain a longer service life.

[0048] In embodiments of the present invention, the yarn is a chemical fiber filament or a composite filament, including polyester filament, polyamide filament, or a combination thereof.

[0049] In an embodiment of the present invention, the width of the fabric is 240cm to 300cm.

[0050] To ensure that the extended yarn segments are stably embedded in the dense loop layer, in certain preferred embodiments, at least 30% of the yarn in the extended yarn segment layer is located within the dense loop layer. Such extended yarn segments are secure and reliable, with slippage in the thickness direction less than 50% of their own diameter.

[0051] In some preferred embodiments, at least 50-200 anchor points are present per square centimeter of the fabric. These anchor points are the number of knots where an extended yarn segment is wrapped by a loop, and this density can be controlled by adjusting the number of stitches the float needles traverse and the float needle selection frequency. Specifically, since each anchor point corresponds to a segment of extended yarn captured and wrapped by a loop needle, if the extended yarn segment traverses multiple stitches, a float needle will only produce one float segment in a knitting cycle, and this float segment will only form one anchor point. Therefore, the more stitches traversed, the fewer the number of anchor points per unit length; conversely, the fewer stitches traversed, the denser the anchor points. The needle selection frequency refers to the proportion of float needles participating in the formation of floats to all float needles in a knitting cycle. If only some float needles in each row form floats, then only the positions corresponding to these floats will generate anchor points. Therefore, by changing the needle selection pattern, the distribution of anchor points can be adjusted.

[0052] Specifically, the anchor point distribution density is determined in the following manner:

[0053] When the fabric is laid flat in its natural state, the cross-section or surface structure of the fabric is observed using an optical microscope at a depth of 1 cm. 2 The number of extended yarn segments forming restricted connection structures within the region is counted, and the average value of three different regions is taken.

[0054] In some preferred embodiments, in order to obtain a sensorily distinguishable double-sided texture, the yarns of the extended yarn segments in the fabric account for 30%-60% of the total yarns in the corresponding area per unit area.

[0055] Specifically, the length of the extended yarn segment is obtained by the yarn unraveling measurement method:

[0056] Under natural conditions, the fabric unit loop structure is cut out, the extended yarn segment is unfolded and measured, and its length is calculated as a proportion of the total yarn length in the corresponding area.

[0057] In some preferred embodiments, such as Figure 1 and Figure 2 As shown, the surface of the extended yarn segment layer has a nap.

[0058] Embodiments of the present invention also provide a method for preparing a single-layer knitted double-sided temperature-sensitive fabric as described in the above embodiments, using a double-cylinder circular knitting machine. In the embodiments of the present invention, the relative positions of the loop-forming needles and the float needles in the double-cylinder circular knitting machine are not limited, and they can be interchanged. For clarity, in the embodiments of the present invention, the loop-forming needles are installed in the lower cylinder with the needle hooks facing upwards, and the float needles are installed in the upper cylinder with the needle hooks facing downwards. The loop-forming needles are used to form a dense loop layer above the fabric, and the float needles are used to form an extended yarn segment layer below the fabric.

[0059] The above configuration causes the hooks of the looping needle and the floating needle to face each other, naturally forming a gap between them, which facilitates the transfer and capture of the extended yarn segment.

[0060] The pressing depth of the loop needle is set to D1, and the pressing depth of the float needle is set to D2, where D1 is less than D2. For example, D1 is 1.0mm to 1.5mm, which is a relatively small depth, corresponding to short loops, and can form a dense structure. D2 is 2.5mm to 3.0mm, which is a relatively large depth. The float needle obtains a longer yarn segment through a deeper yarn pick-up path, which can provide a reserve for the subsequent float length. This yarn segment then slips off due to the early reset of the float needle, and eventually becomes an extended yarn segment.

[0061] Asymmetric single-layer structure weaving is performed under the above parameters. The weaving of the dense loop-forming layer structure is no different from existing technologies, that is, the loop needles form short and complete loops during the weaving process, constituting a dense loop-forming structure layer. For example... Figure 5 As shown, the realization of the extended yarn segment layer on the reverse side of the dense loop structure layer specifically includes stages 1-5, with each step as follows:

[0062] Step S101, corresponding to stage 1, the yarn is hung on the float needle.

[0063] In each knitting cycle, the float needle is made to hook the yarn only near the hook of the float needle during the knitting process, forming a longer yarn pick-up path, thereby forming an extended yarn segment.

[0064] like Figure 6 As shown, this process corresponds to a spindle rotation angle of 0° to 90°.

[0065] During this stage, the float needle descends from its initial position, and as it passes the yarn guide, the yarn is cushioned into its hook. Due to the large pressure depth D2 of the float needle, the needle descends deeply, but a complete loop is not formed. The yarn is only stretched and caught near the hook opening, resulting in a longer yarn picking path.

[0066] During this stage, the looping needle simultaneously performs normal loop removal and yarn padding, but its pressing depth D1 is relatively small, preparing to form a dense short loop.

[0067] At this stage, the yarn exists in the hook area of ​​both needles, but the yarn segment on the float needle is longer and has not yet been fixed.

[0068] Step S102, corresponding to stage 2, the floating needle is reset in advance.

[0069] The float needle begins to reset a first phase angle ahead of its standard reset time, and the extended yarn segment hanging on the float needle hook slips off the float needle hook before the float needle tongue closes.

[0070] like Figure 6 As shown, this process corresponds to a spindle rotation angle of 90° to 180°.

[0071] Specifically, the standard reset time is usually after 180°, generally between 180° and 200°. In the embodiments of the present invention, the reset triangle of the float needle is set in advance, for example, the float needle starts to rise and reset when the spindle rotation angle is about 160° to 190°, with an advance amount of 10° to 20°.

[0072] During this stage, the float needle moves upward from its lowest point to reset. At this time, because the reset is too early, its tongue has not yet been closed by the old coil, meaning the tongue is still in the open state.

[0073] During this stage, the yarn caught on the needle hook is not pushed onto the back of the needle by the needle tongue, but instead slips directly off the needle hook, causing the yarn to lose support and become a free segment.

[0074] At this stage, the looping needle is still in a low position or has just begun to rise and has not yet come into contact with the slipped yarn.

[0075] Step S103, corresponding to stage 3, the yarn falls into the gap.

[0076] The yarn falls into the gap between the loop needle and the float needle.

[0077] like Figure 6 As shown, this process corresponds to a spindle rotation angle of 180° to 240°.

[0078] During this stage, the yarn that slips off the float needle falls naturally under the influence of gravity and yarn tension, and falls into the gap between the looping needle and the float needle. The height of this gap is usually 2 to 5 mm.

[0079] During this stage, the floating needle continues to rise, gradually moving away from the gap; the looping needle begins to rise from a low position, but at this time its tab is still closed and the hook has not yet been exposed.

[0080] During this stage, the yarn hangs freely in the middle of the gap, waiting to be captured.

[0081] Step S104, corresponding to stage 4, delayed opening of the tongue with loop needle.

[0082] The opening time of the looping needle's latch is delayed by a second phase angle relative to its standard opening time, so that the looping needle opens its latch when it moves to the height of the gap, exposing the lateral opening of the looping needle.

[0083] like Figure 6 As shown, this process corresponds to a spindle rotation angle of 240° to 300°.

[0084] The standard opening time of the needle latch is usually between 240° and 260°. In this embodiment of the invention, the opening control triangle of the looping needle is delayed, so that the opening time of the looping needle's latch is delayed by 10° to 20°, that is, the latch opens at approximately 250° to 280°. Looping needle operation:

[0085] During this stage, the looping needle continues to rise, entering the gap area. As the old loop slides down the needle bar, when the needle rises to a sufficient height, the old loop pushes the needle latch to rotate around the axis, opening the latch and revealing the lateral opening of the needle hook. Due to the delayed opening, the looping needle is already in a higher position when the latch opens, which is beneficial for meeting the suspended yarn.

[0086] During this stage, the yarn is still in the gaps, in a relaxed or slightly tense state.

[0087] Step S105, corresponding to stage 5, the yarn slides into the loop-forming needle.

[0088] The extended yarn segment slides laterally into the hook of the looping needle. The looping needle bends the yarn to form a new loop, and during the formation of the new loop, it wraps the extended yarn segment that has entered its hook into its own yarn body, forming an embedded anchor point.

[0089] After the loop needle's latch opens, the opening direction of the needle hook is lateral, that is, perpendicular to the needle shaft. When the extended yarn segment enters the gap, under its own tension or external oscillation, the yarn segment enters the needle hook from the side of the needle bar. This lateral introduction method does not rely on the perpendicular alignment of the yarn and the needle hook, and has higher reliability.

[0090] like Figure 6 As shown, this process corresponds to a spindle rotation angle of 300° to 360°.

[0091] During this stage, after the looping needle's latch opens, the needle hook opening faces to the side. The yarn in the gap, under its own tension, gravity, and possible tension fluctuations, swings laterally and slides into the looping needle's hook.

[0092] In this stage, the looping needle descends with the yarn, performing a bending motion. Since the yarn is already inside the needle hook, this yarn segment is wrapped from three sides by the newly formed looped yarn during bending. The looping needle continues to descend to its lowest point, completing the unhooking and forming a complete loop. This loop wraps the extended yarn segment that had previously entered the needle hook within its own yarn body, forming an embedded anchor point. The extended yarn segment at the anchor point is firmly locked within the dense looped layer and cannot be pulled out. The uncaptured extended yarn segments are freely distributed on the reverse side of the fabric, forming a fluffy float layer.

[0093] Specifically, in this embodiment, in step S102, the early reset of the float needle is achieved by setting the reset triangle of the corresponding float needle track in advance, so that the float needle begins to rise and reset before the spindle rotates to a predetermined phase angle. Similarly, the delayed opening of the looping needle is achieved by setting the opening control triangle of the corresponding looping needle track in a delayed manner, so that the looping needle opens its tongue at the delayed phase position.

[0094] In some preferred embodiments, in order to enable the extended yarn segment to achieve the above-mentioned slippage-lateral introduction-embedded anchoring process, dynamic tension adjustment is also performed in conjunction with needle position movement, loop formation process, or yarn feeding state. Therefore, the method further includes:

[0095] Step S201: To facilitate the slippage of the extended yarn segment from the needle hook, within a 30° phase before the float needle begins to reset, the yarn feeding tension on the extended yarn side is reduced from a first tension value to a second tension value and maintained. In this embodiment, the float needle resets earlier at a spindle rotation angle of 160°–190°, therefore, the yarn feeding tension is preferably reduced from 12–15 cN to 6–9 cN and maintained during a spindle rotation angle of 130°–160°. At this time, the yarn is in a relatively relaxed state, making it easier to slip from the float needle hook and form a natural sag after falling into the gap.

[0096] Step S202: To ensure the extended yarn segment can be re-tensioned and stably guided into the loop-forming needle hook, within a 5° to 15° phase before the loop-forming needle tongue opens, specifically during the spindle rotation angle of 235° to 275°, the yarn feed tension on the extended yarn side is increased from the second tension value to the third tension value. Specifically, to enhance the wrapping stability during the formation of the embedded anchor point, the third tension value is greater than the first tension value. The sudden increase in tension causes the yarn to oscillate laterally, aligning precisely with the lateral opening of the loop-forming needle hook, thus allowing it to slide in smoothly.

[0097] It should be noted that the above phase window can be fine-tuned according to the actual model, but the relative timing of descending first and then rising must be maintained.

[0098] In some preferred embodiments, prior to the above preparation, the number of anchoring points is first controlled, and the specific method is as follows:

[0099] Based on the target anchor point density, set the number of needle spacing N across the float needle and the needle selection frequency f.

[0100] The number of stitch lengths N is set by selecting the length of the floating line area in the floating line needle triangle. For example, in some embodiments, if the floating line length is approximately 2 stitch lengths, there is a floating line segment every 2 stitches, resulting in a relatively high anchoring point density. In other embodiments, if the floating line length is approximately 5 stitch lengths, there is a floating line segment only every 5 stitches, resulting in a low anchoring point density.

[0101] The needle selection frequency *f* is set by a programmable electronic needle selector pattern, ensuring that a predetermined proportion of float needles in each row are selected to form extended yarn segments. Specifically, during the knitting process, the control system, based on the designed pattern data, determines in each knitting cycle which float needles enter the float mode (avoiding loop formation) and which enter the loop-forming mode (forming loops normally). In this case, no floats are generated, and no anchor points are formed. For example, in some embodiments, one needle is selected as a float needle out of every two needles, resulting in a high float density and many anchor points. In other embodiments, one needle is selected as a float needle out of every eight needles, resulting in sparse floats and fewer anchor points.

[0102] The aforementioned span of needle spacing N and needle selection frequency f can be combined to determine the distribution position and length of the float.

[0103] In some preferred embodiments, after the fabric weaving is completed according to the above method, in order to increase the temperature difference between the two sides, the method further includes:

[0104] The extended yarn segment layer in the woven fabric is subjected to a napping treatment. Specifically, the napping treatment can be performed using a conventional napping machine, such as a wire napping machine or a sandpaper napping machine. The napping roller speed is controlled at 800 rpm to 1000 rpm, and the fabric feeding speed is 8 m / min to 12 m / min. The surface of the extended yarn segment layer is gently napped to form a fluffy layer to enhance the warmth. The fluff length is 1.5 mm to 4 mm. The fluff length is determined by the fabric fluff height test method, and the average value of at least 20 random positions is taken.

[0105] After napping, in order to ensure the stability of the fabric dimensions, the napped fabric is further shaped. This can be done by heat setting or resin setting. Specifically, heat setting can be carried out at 180°C to 190°C for 40 to 60 seconds, with an overfeed of 3% to 5%.

[0106] After the above weaving cycle and the napping and shaping processes, the resulting fabric is as follows: Figure 1 , Figure 2 , Figure 3As shown:

[0107] The upper layer is a dense looped layer composed of short loops formed by looping needles, which is the cool-feeling surface; the lower layer is an extended yarn segment layer composed of long floats that are not captured, and the surface forms a fuzzy texture, which is the warm-feeling surface.

[0108] like Figure 3 As shown in the magnified view, the two are mechanically connected by multiple embedded anchor points to ensure that the extended yarn segments do not fall off during use and cleaning.

[0109] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

Claims

1. A single-layer knitted double-sided temperature-sensitive fabric, characterized in that, The fabric is woven from yarn in one piece, and its structure includes a dense loop layer and an extended yarn segment layer located on one side of the dense loop layer. The extended yarn segment layer includes a plurality of extended yarn segments, at least one of the extended yarn segments passing through at least one loop in the dense loop layer and forming an anchor point.

2. The single-layer knitted double-sided temperature-sensitive fabric according to claim 1, characterized in that, At least 30% of the yarn in the extended yarn segment layer is located in the dense loop layer.

3. The single-layer knitted double-sided temperature-sensitive fabric according to claim 1, characterized in that, There are at least 50-200 anchor points per square centimeter of the fabric.

4. The single-layer knitted double-sided temperature-sensitive fabric according to claim 1, characterized in that, In terms of unit area, the yarns of the extended yarn segments in the fabric account for 30%-60% of the total yarns in the corresponding area.

5. The single-layer knitted double-sided temperature-sensitive fabric according to claim 1, characterized in that, The surface of the extended yarn segment layer has a nap.

6. A method for preparing a single-layer knitted double-sided temperature-sensitive fabric, characterized in that, include: Asymmetric single-layer structure spinning is performed using a double-cylinder circular knitting machine, wherein: The press depth of the loop needle is set to D1, so that the loop needle forms short and complete loops during the knitting process, forming a dense loop structure layer; The pressing depth of the floating needle is set to D2, where D1 is less than D2; in each knitting cycle, the floating needle hangs the yarn only near the hook of the floating needle during the knitting process to form a longer yarn picking path, thereby forming an extended yarn segment. The float needle is reset by a first phase angle ahead of its standard reset time, so that the extended yarn segment hanging on the hook of the float needle slips off the hook of the float needle before the needle tongue of the float needle closes and falls into the gap between the looping needle and the float needle. The opening time of the loop forming needle's latch is delayed by a second phase angle relative to its standard opening time, so that the loop forming needle opens its latch when it moves to the height of the gap, exposing the lateral opening of the loop forming needle and allowing the extended yarn segment to slide laterally into the hook of the loop forming needle. The looping needle bends the yarn to form a new loop, and during the forming process of the new loop, the extended yarn segment that has entered its needle hook is wrapped in its own yarn body to form an embedded anchor point.

7. The method for preparing a single-layer knitted double-sided temperature-sensitive fabric according to claim 6, characterized in that, D1 is 1.0mm to 1.5mm, and D2 is 2.5mm to 3.0mm.

8. The method for preparing a single-layer knitted double-sided temperature-sensitive fabric according to claim 6, characterized in that, The first phase angle is a 10° to 20° spindle rotation angle, and the second phase angle is a 10° to 20° spindle rotation angle.

9. The method for preparing a single-layer knitted double-sided temperature-sensitive fabric according to claim 6, characterized in that, The method further includes: Within a 30° phase before the float needle begins to reset, the yarn feeding tension on the extended yarn side is reduced from a first tension value to a second tension value and maintained. Within a 5° to 15° phase before the looping needle tongue opens, the yarn feeding tension on the extended yarn side is increased from the second tension value to the third tension value; The third tension value is greater than the first tension value.

10. The method for preparing a single-layer knitted double-sided temperature-sensitive fabric according to claim 6, characterized in that, The method further includes: The extended yarn segments in the woven fabric are treated with a napping process. The fabric that has undergone napping is then set.

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