Printed oval rope and preparation method thereof

Abstract

The present invention relates to a printed oval rope and a preparation method thereof, comprising the following steps: preparing a core covering layer; the core covering layer comprising a core yarn and a thermal expansion agent; forming a surface layer on the surface of the core covering layer to obtain an oval rope; and performing a thermal sublimation printing treatment on the surface of the oval rope to obtain the printed oval rope; wherein, when performing the thermal sublimation printing treatment on the oval rope, the relationship between the area and the perimeter of the cross section of the oval rope and the hot pressing groove is controlled to effectively prevent the problem of incomplete pattern transfer caused by the shrinkage of the oval rope, thereby improving the integrity of the printed pattern of the oval rope.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a printed oval rope and a preparation method thereof. Background Art

[0002] Sublimation printing is a transfer printing process in which ink is printed on paper, rubber or other carriers and then transferred to the item to be printed.

[0003] Sublimation printing is primarily used on polyester fabrics. Using high temperatures (around 200°C), the dye is sublimated into a vapor phase that condenses on the polyester surface. The vapor then penetrates the amorphous regions of the fiber's macromolecules and, after cooling, becomes fixed within the fiber. Currently, sublimation printing is primarily used for flat-surface printing or semi-curved surface transfer printing on textiles such as T-shirts, promotional shirts, T-shirts, dresses, sportswear, couples' clothing, and fashionable underwear.

[0004] When a round rope is printed using a thermal sublimation printing process, problems such as incomplete printed patterns and poor integrity of the printed patterns may easily occur on the surface of the round rope. Summary of the Invention

[0005] Based on this, it is necessary to provide a printed oval rope and a preparation method thereof that can improve the integrity of the printed pattern.

[0006] In a first aspect, the present invention provides a method for preparing a printed oval rope, comprising:

[0007] Prepare a core covering layer; the core covering layer includes a core yarn and a thermal expansion agent;

[0008] A surface layer is formed on the core layer to obtain an elliptical rope;

[0009] Performing thermal sublimation printing on the surface of the oval rope to obtain a printed oval rope;

[0010] The heat sublimation printing process includes performing a hot stamping process on the oval rope in a hot stamping device;

[0011] The ironing device includes an ironing assembly, which includes a first ironing piece with a first groove and a second ironing piece with a second groove, wherein the first groove and the second groove cooperate with each other to form an ironing groove with an elliptical cross section;

[0012] During the ironing treatment, the oval rope is placed in the ironing tank; the cross-sectional area of the oval rope is 5% to 13% larger than the cross-sectional area of the ironing tank; the cross-sectional perimeter of the oval rope is 0.5% to 2.7% smaller than the cross-sectional perimeter of the ironing tank.

[0013] In the preparation method of the printed elliptical rope of the present invention, the elliptical rope is prepared into a structure in which a surface layer is covered with a core layer, and the core layer contains core yarn and a thermal expansion agent. The elliptical rope is printed using a thermal sublimation printing process. The thermal expansion agent expands when heated, causing the elliptical rope to expand outward when heated, which can reduce the shrinkage of the cross-section of the elliptical rope under heating and external pressure as a whole, effectively preventing the problem of incomplete transfer of the printed pattern due to the shrinkage of the elliptical rope, and thus improving the integrity of the printed pattern of the elliptical rope. At the same time, the outward expansion of the elliptical rope forms pressure between the elliptical rope and the thermal sublimation transfer paper, causing the two to fit closely, making the printed printed pattern clearer. Furthermore, by controlling the relationship between the cross-sectional area and circumference of the hot pressing groove in the hot pressing equipment and the cross-sectional area and circumference of the elliptical rope, even if the length and short radii of the elliptical rope are uneven during the hot pressing process, the thermal sublimation transfer paper can still be completely covered on the surface of the elliptical rope without being easily folded, thereby further improving the integrity of the printed pattern on the surface of the elliptical rope; and the hot pressing groove, the thermal sublimation transfer paper and the elliptical rope can be tightly fitted together, thereby further improving the clarity of the printed pattern on the surface of the elliptical rope.

[0014] In some embodiments, the pressing temperature of the hot pressing treatment is 170℃~225℃; the hot pressing treatment includes multiple hot pressings using the hot pressing component, and the hot pressing time of a single hot pressing is 1.5s~7.5s; the stroke length of the elliptical rope relative to the hot pressing component between two adjacent hot pressings is 5%~35% of the length of the hot pressing groove.

[0015] In some embodiments, the core covering layer includes 96-99 parts of core covering yarn and 1-4 parts of thermal expansion agent.

[0016] In some embodiments, the thermal expansion agent is loaded inside and on the surface of the core-spun yarn.

[0017] In some embodiments, the core-spun yarn includes at least one of cotton yarn and linen yarn.

[0018] In some embodiments, the core-spun yarn includes cotton yarn and linen yarn, and the mass ratio of cotton yarn to linen yarn is 100:(0.5-2).

[0019] In some embodiments, the cotton yarn is absorbent cotton yarn.

[0020] In some embodiments, the linen yarn is absorbent linen yarn.

[0021] In some embodiments, the surface layer includes a veil, which is a polyester yarn.

[0022] In some embodiments, the fineness of the cotton yarn and the linen yarn is independently 20S / 2 to 60S / 2.

[0023] In some embodiments, the face yarn is a polyester yarn with a fineness of 100D to 300D and a twist count of 150 to 200.

[0024] In some embodiments, the cross section of the core layer is elliptical, the long radius of the cross section of the core layer is 2.0mm~6.5mm, and the short radius of the cross section of the core layer is 1.8mm~5.8mm; the difference between the long radius and the short radius of the cross section of the core layer is 0.2mm~0.8mm.

[0025] In some embodiments, the long radius of the cross section of the elliptical rope is 2.2 mm to 6.8 mm, and the short radius of the cross section of the elliptical rope is 2.0 mm to 6.2 mm.

[0026] In some embodiments, after the thermal sublimation printing process, the printed oval rope is further subjected to a water washing process; the washing liquid used in the water washing process includes water and polyester-cotton soap detergent; the washing temperature is 78°C to 82°C; and the washing time is 30 minutes to 45 minutes.

[0027] In some embodiments, preparing the elliptical rope core layer includes the following steps:

[0028] The core-spun yarn is immersed in a water-soluble emulsion of a thermal expansion agent and dried.

[0029] In a second aspect, the present invention provides a printed oval rope prepared according to the above-mentioned printed oval rope preparation method.

[0030] In a third aspect, the present invention provides a printed elliptical rope comprising a core layer and a surface layer arranged on the outer surface of the core layer; the core layer comprises 96 to 99 parts of core yarn and 1 to 4 parts of thermal expansion agent by weight; the surface layer has a print.

[0031] The above-mentioned printed oval rope adopts a structure in which a surface layer covers a core layer, and the core layer contains a specific proportion of core-spun yarn and a thermal expansion agent. Therefore, when the above-mentioned printed oval rope is printed using a printing process such as thermal sublimation printing, the thermal expansion agent expands when heated, causing the oval rope to expand outward when heated, which can reduce the overall shrinkage of the oval rope when heated, and effectively prevent the problem of incomplete transfer of the printed pattern due to the shrinkage of the oval rope, thereby improving the integrity of the printed pattern of the oval rope; at the same time, the oval rope expands outward when heated, and pressure is formed between the oval rope and the thermal sublimation transfer paper, causing the two to fit closely, making the printed pattern clearer. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more fully below, along with preferred embodiments thereof. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. It should be understood that these embodiments are provided for the purpose of providing a more thorough and comprehensive understanding of the disclosure of the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is illustrated by the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention and can be used to describe the present invention. They should not be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0036] The present invention provides a printed oval rope and a preparation method thereof. The printed oval rope will be described in detail below in conjunction with the preparation method.

[0037] One embodiment of the present invention provides a method for preparing a printed oval rope, comprising the following steps S10 to S30:

[0038] S10, preparing a core covering layer; the core covering layer includes a core yarn and a thermal expansion agent;

[0039] S20, forming a surface layer on the surface of the core layer to obtain an elliptical rope;

[0040] S30, performing thermal sublimation printing on the surface of the oval rope to obtain a printed oval rope.

[0041] The above-mentioned heat sublimation printing process includes hot stamping the oval rope in a hot stamping device;

[0042] The ironing device includes an ironing assembly, which includes a first ironing piece with a first groove and a second ironing piece with a second groove, wherein the first groove and the second groove cooperate with each other to form an ironing groove with an elliptical cross section;

[0043] During the hot pressing process, the elliptical rope is placed in the hot pressing tank; the cross-sectional area of the elliptical rope is 5% to 13% larger than the cross-sectional area of the hot pressing tank; the circumference of the cross section of the elliptical rope is 0.5% to 2.7% smaller than the circumference of the cross section of the hot pressing tank.

[0044] In the preparation method of the printed elliptical rope of the present invention, the elliptical rope is prepared into a structure in which a surface layer is covered with a core layer, and the core layer contains core yarn and a thermal expansion agent. The elliptical rope is printed using a thermal sublimation printing process. The thermal expansion agent expands when heated, causing the elliptical rope to expand outward when heated, which can reduce the overall shrinkage of the elliptical rope when heated, effectively preventing the problem of incomplete transfer of the printed pattern due to the shrinkage of the elliptical rope, and thus improving the integrity of the printed pattern of the elliptical rope; at the same time, the outward expansion of the elliptical rope forms pressure between the elliptical rope and the thermal sublimation transfer paper, causing the two to fit closely, making the printed pattern clearer. Furthermore, by controlling the relationship between the cross-sectional area and circumference of the hot pressing groove in the hot pressing equipment and the cross-sectional area and circumference of the elliptical rope, even if the length and short radii of the elliptical rope are uneven during the hot pressing process, the thermal sublimation transfer paper can still be completely covered on the surface of the elliptical rope without being easily folded, thereby further improving the integrity of the printed pattern on the surface of the elliptical rope; and the hot pressing groove, the thermal sublimation transfer paper and the elliptical rope can be tightly fitted together, thereby further improving the clarity of the printed pattern on the surface of the elliptical rope.

[0045] Furthermore, the cross-sectional area of the elliptical rope is 5% to 10% larger than the cross-sectional area of the hot pressing groove; the perimeter of the cross-sectional area of the elliptical rope is 0.5% to 2% smaller than the perimeter of the cross-sectional area of the hot pressing groove.

[0046] In some embodiments, the pressing temperature of the hot pressing process is 170° C. to 225° C. Further, the pressing temperature of the hot pressing process is 180° C. to 225° C.

[0047] In some embodiments, the ironing treatment includes multiple ironing operations using the ironing component, and the ironing time of a single ironing operation is 1.5s to 7.5s; the length of the travel of the elliptical rope relative to the ironing component between two adjacent ironing operations is 5% to 35% of the length of the ironing groove.

[0048] In the sublimation printing process, the hot stamping equipment needs to perform multiple hot stamping on the oval rope. After each hot stamping, the oval rope, wrapped in the sublimation transfer paper, and the paper must be moved a certain distance toward the receiving trough to allow the unpressed portion to be hot stamped. The distance the oval rope moves after each hot stamping is called the stroke length. If the hot stamping time is too long, the heat from the hot stamping trough's hot plate will slowly transfer to the adjacent sublimation transfer paper and oval rope. When the temperature of the sublimation transfer paper exceeds 150°C, a small amount of ink will migrate or sublimate, resulting in color discrepancies or blurred patterns. By controlling the single hot pressing time and stroke length, the present invention can prevent the pattern ink on the thermal sublimation transfer paper to be entered into the hot pressing tank from being heated and sublimated due to the heat transfer in the hot pressing tank, resulting in the problem of reduced clarity of the elliptical rope printed pattern, blurred pattern or the pattern color being different from the preset color; at the same time, it can also prevent the ink of the printed pattern already transferred to the surface of the elliptical rope from being heated and sublimated again due to the heat transfer in the hot pressing tank, resulting in reduced clarity of the printed pattern or the pattern color being different from the preset color; thereby improving the clarity and integrity of the elliptical rope printed pattern and ensuring that the color expression of the printed pattern can meet the preset requirements.

[0049] Furthermore, the pressing time of a single pressing is 1.5s to 7.5s; the travel length of the elliptical cord relative to the pressing assembly between two adjacent pressings is 6% to 35% of the length of the pressing slot. Optionally, the pressing time of a single pressing is 1.5s, 2s, 2.5s, 3s, 3.5s, 4s, 4.5s, 5s, 5.5s, 6s, 6.5s, or 7s.

[0050] In some embodiments, the total pressing time of the hot pressing process is 18 seconds to 36 seconds. The total pressing time of the hot pressing process is controlled to allow the ink on the thermal sublimation transfer paper pattern to sublime and transfer to the surface of the oval rope, further improving the clarity of the printed pattern on the oval rope surface.

[0051] In some embodiments, the core covering layer includes 96-99 parts of core covering yarn and 1-4 parts of thermal expansion agent by weight.

[0052] Optionally, the weight proportion of the core-spun yarn is 96 parts, 97 parts, 98 parts or 99 parts.

[0053] Optionally, the weight proportion of the thermal expansion agent is 1 part, 2 parts, 3 parts or 4 parts.

[0054] In some embodiments, the core covering layer includes 96% to 99% by mass of the core covering yarn and 1% to 4% by mass of the thermal expansion agent.

[0055] In some embodiments, the thermal expansion agent is loaded inside and on the surface of the core-spun yarn.

[0056] In some embodiments, the thermal expansion agent is adhered to the interior and surface of the core-spun yarn.

[0057] In some embodiments, the core spun yarn includes at least one of cotton yarn and linen yarn.

[0058] In some embodiments, the core-spun yarn includes cotton yarn and linen yarn. Cotton yarn and linen yarn do not soften or deform at high temperatures of around 220°C. Linen yarn has low elasticity and shrinkage. Using cotton yarn and linen yarn as the core-spun layer material can further reduce the longitudinal shrinkage of the elliptical rope as a whole due to heat and reduce the compression of the cross-sectional area, thereby preventing the elliptical rope from shrinking in the sublimation printing process, thereby improving the integrity of the printed pattern. It can also prevent the elliptical rope from being stretched and lengthened during printing processes such as sublimation printing. Generally, during sublimation printing, the elliptical rope needs to be stretched and pulled from one end so that the unpressed portion enters the pressing tank for pressing. However, during the stretching and pulling process, the elliptical rope is stretched and lengthened, while the transfer paper does not extend, resulting in repeated printing of different prints on some parts of the elliptical rope surface, resulting in repeated printing defects. Since the stretching and lengthening of the elliptical rope is suppressed, repeated printing defects are effectively reduced, thereby improving the printing quality.

[0059] In some embodiments, the mass ratio of cotton yarn to linen yarn in the core-spun yarn is 100:(0.5~2). The core-spun yarn within this range can effectively reduce the heat shrinkage of the elliptical rope, while making the elliptical rope have a certain elasticity and not be too hard, and can also prevent the elliptical rope from being stretched.

[0060] Optionally, the mass ratio of cotton yarn to linen yarn is 100:0.5, 100:0.75, 100:1, 100:1.25, 100:1.5, 100:1.75 or 100:2.

[0061] In some embodiments, the cotton yarn is absorbent cotton yarn, and the linen yarn is absorbent linen yarn. The absorbent cotton yarn and the absorbent linen yarn cooperate with each other to further prevent the elliptical rope from being easily flattened under high temperature and high pressure conditions.

[0062] In some embodiments, the fineness of the cotton yarn is 20S / 2 to 60S / 2, and the fineness of the hemp yarn is 20S / 2 to 60S / 2. Controlling the fineness of the cotton rope and the hemp rope is beneficial to controlling the tightness of the core layer, so that the elliptical rope is 0.2Kg / cm 2 During the hot pressing, the diameter of the elliptical cross section is reduced by less than 20%. The core layer prepared by the cotton yarn and linen yarn in the above-mentioned fineness range in conjunction with the thermal expansion agent can expand outward under heating conditions, effectively preventing the elliptical rope from being flattened and further reducing defects in the printed pattern.

[0063] In some embodiments, the surface layer includes a bread yarn, and the bread yarn is selected from polyester yarn. Selecting polyester yarn as the surface layer material of the printed oval rope makes the color fastness of the printed pattern on the surface of the printed oval rope higher and the color fixing effect better.

[0064] In some embodiments, the face yarn is made of polyester with a fineness of 100D to 300D and a twist count of 150 to 200.

[0065] In some embodiments, the face yarn is DTY polyester with a fineness of 100D / 36F and a twist count of 200.

[0066] In some embodiments, the particle size of the thermal expansion agent is 22 μm to 32 μm.

[0067] Optionally, the particle size of the expanding agent is 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, 31 μm or 32 μm.

[0068] In some embodiments, the thermal expansion agent has a starting temperature of 160° C. to 170° C.;

[0069] In some embodiments, the peak foaming temperature of the thermal expansion agent is 190° C. to 200° C.;

[0070] In some embodiments, the ultra-low foaming density of the thermal expansion agent is less than 2 kg / m 3 .

[0071] Optionally, the density of the expansion agent is 1.0 to 1.1 g / cm 3 .

[0072] As an example, the thermal expansion agent may be selected from microcapsule thermal expansion agent UNCELL-MS205D.

[0073] In some embodiments, the core-spun yarn further includes an adhesive, which can allow the thermal expansion agent to adhere to the surface or interior of the core-spun yarn.

[0074] In some embodiments, the mass ratio of the thermal expansion agent to the adhesive is (15-25):(15-25).

[0075] As an example, the adhesive may be selected from Foshan Hesheng New Materials Co., Ltd. HS-2023.

[0076] In some embodiments, the cross section of the core layer is elliptical, and the long radius of the cross section of the core layer is 2.0 mm to 6.5 mm. Furthermore, the long radius of the cross section of the core layer is 2.0 mm to 2.10 mm;

[0077] In some embodiments, the short radius of the cross section of the core cladding layer is 1.8 to 5.8 mm. Further, the short radius of the cross section of the core cladding layer is 1.95 to 1.98 mm.

[0078] In some embodiments, the difference between the long radius and the short radius of the cross section of the core cladding layer is 0.2 mm to 0.8 mm.

[0079] Optionally, the difference between the major radius and the minor radius of the cross section of the core layer is 0.2 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm or 0.8 mm.

[0080] In some embodiments, the major radius of the cross section of the elliptical rope is 2.2 mm to 6.8 mm.

[0081] Furthermore, the major radius of the cross section of the elliptical rope is 2.25 mm to 2.30 mm.

[0082] In some embodiments, the short radius of the cross section of the elliptical rope is 2.00 mm to 6.2 mm.

[0083] Furthermore, the short radius of the cross section of the elliptical rope is 2.00 mm to 2.05 mm.

[0084] In some embodiments, the long radius of the cross-section of the embossing groove is 2.75 mm to 9.0 mm, and the short radius of the cross-section of the embossing groove is 1.35 mm to 4.18 mm. Controlling the long and short radii of the cross-section of the embossing groove can further prevent the problem of indentations on the surface of the elliptical rope due to a mismatch between the size of the elliptical rope and the embossing groove during the embossing process, thereby further improving the printing quality of the printed elliptical rope.

[0085] In some embodiments, after the thermal sublimation printing process, the printed oval rope is further subjected to a water washing process; the washing process can further improve the color fastness of the thermal sublimation product, and ultimately obtain a printed round rope with a complete and clear pattern, and the printed oval rope also has an excellent touch feel.

[0086] In some embodiments, the washing liquid used in the washing process includes water and polyester-cotton soap detergent.

[0087] In some embodiments, the temperature of the water washing treatment is 78°C to 82°C.

[0088] In some embodiments, the water washing treatment lasts for 30 minutes to 45 minutes.

[0089] In some embodiments, the method for preparing the core-spun layer further comprises the following steps: soaking the core-spun yarn in a water-soluble emulsion of a thermal expansion agent and drying the core-spun yarn.

[0090] In some embodiments, the water-soluble emulsion of the thermal expansion agent comprises the thermal expansion agent, the aqueous emulsifier and the adhesive in a mass ratio of (15-25):(2-5):(15-25).

[0091] Furthermore, the water-soluble emulsion of the thermal expansion agent comprises the thermal expansion agent, the emulsifier and the adhesive in a mass ratio of 25:5:25.

[0092] As an example, the water-soluble emulsifier may be selected from LCF-185 produced by Fuying Technology Chemical Co., Ltd.

[0093] One embodiment of the present invention provides a printed oval rope prepared according to the above-mentioned printed oval rope preparation method.

[0094] One embodiment of the present invention provides a printed elliptical rope, comprising a core layer and a surface layer arranged on the outer surface of the core layer; the core layer comprises 96 to 99 parts of core yarn and 1 to 4 parts of thermal expansion agent by weight; the surface layer has a print.

[0095] The above-mentioned printed oval rope adopts a structure in which a surface layer covers a core layer, and the core layer contains a specific proportion of core-spun yarn and a thermal expansion agent. Therefore, when the above-mentioned printed oval rope is printed using a printing process such as thermal sublimation printing, the thermal expansion agent expands when heated, causing the oval rope to expand outward when heated. Pressure is formed between the oval rope and the thermal sublimation transfer paper, causing the two to fit closely, making the printed pattern clearer; at the same time, it can also reduce the overall shrinkage of the oval rope when heated, effectively preventing the problem of incomplete transfer of the printed pattern due to the shrinkage of the oval rope, thereby improving the integrity of the printed pattern of the oval rope.

[0096] Furthermore, the entire surface of the printed oval rope is printed with printed patterns.

[0097] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is illustrated by the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention and can be used to describe the present invention. They should not be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0098] In order to better illustrate the present invention, the present invention is further described below with reference to the following embodiments.

[0099] Example 1

[0100] Preparation of printed oval rope

[0101] (1) 96 parts by weight of 32S / 2 degreased cotton and 1.92 parts by weight of 32S / 2 degreased pure linen yarn were soaked in a water-soluble emulsion containing 2 parts by weight of microcapsule thermal expansion agent UNCELL-MS205D; the solution was an aqueous solution comprising a thermal expansion agent, an aqueous emulsifier and an adhesive in a mass ratio of 25:5:25; and then dried at 70°C to obtain cotton yarn and linen yarn loaded with thermal expansion agent.

[0102] (2) The cotton yarn and linen yarn in step (1) are used to weave an elliptical rope core layer with a long radius of 2.05 mm and a short radius of 1.95.

[0103] (3) 100D / 36F, 200 twist DTY polyester filament is used to form a surface layer on the core layer to obtain an elliptical rope with a long radius of 2.25 mm and a short radius of 2.00 mm.

[0104] (4) Design the inner diameter of the ellipse of the cross section of the hot pressing groove in the hot pressing equipment, where the long radius of the cross section of the hot pressing groove is 2.75 mm, the short radius is 1.5 mm, and the length of each hot pressing groove is 1500 mm.

[0105] (5) Design of thermal sublimation printing transfer pattern: Design the artwork to be solid color and have a specific pattern; and wrap the thermal sublimation transfer printing paper on the surface of the elliptical rope obtained in step (3).

[0106] (6) The elliptical rope with the surface wrapped with the sublimation transfer paper is placed in the hot pressing tank of the hot pressing equipment for hot pressing of sublimation printing, wherein the hot pressing temperature is 200°C, the hot pressing time of a single hot pressing is 5.0s, the stroke length after a single hot pressing is 300mm, and the total hot pressing time is 25s.

[0107] (7) Washing: Add 60 liters of water to a garment washing machine, wash 10 kg of printed oval rope in a garment washing machine, add 120-200 grams of polyester-cotton soap detergent DM-2511G (from Guangdong Shunde Demei Chemical Co., Ltd.), heat to 80°C, run for 45 minutes, drain, add 60 liters of water, run for another 10 minutes, take out the rope, dehydrate and dry it to obtain the printed oval rope.

[0108] Performance Testing

[0109] Rubbing fastness: The rubbing fastness test was performed on the printed oval rope prepared by the above method according to the method specified in ISO 105-X16:2016.

[0110] Washing fastness: According to the method specified in AATCC61-2A, the washing fastness of the printed oval rope prepared by the above method was measured at a washing temperature of 50°C and a washing time of 30 minutes.

[0111] Water fastness: The water fastness test was performed on the printed oval rope prepared by the above method according to the method specified in ISO 105-E04-2013.

[0112] Storage fastness: The storage fastness test of the printed oval rope prepared by the above method was carried out according to the method specified in AATCC163-2018.

[0113] Printing appearance: Observe visually.

[0114] Thermal expansion coefficient test method: Measure the volume of the elliptical rope at room temperature and pressure as V1, then place the elliptical rope at 200℃ and normal pressure for 30s, measure its volume as V2, and take the ratio between V2 and V1 as the thermal expansion coefficient of the elliptical rope.

[0115] Boiling water shrinkage: The boiling water shrinkage of the printed oval rope prepared by the above method was tested according to the method specified in GB / T 6505-2017.

[0116] Example 2

[0117] The preparation method of Example 2 is basically the same as the preparation method of Example 1, except that: in step (1) of Example 2, 96 parts by weight of 32S / 2 absorbent cotton and 0.48 parts by weight of 32S / 2 absorbent pure linen yarn are soaked in 2 parts by weight of a water-soluble emulsion of the microcapsule thermal expansion agent UNCELL-MS205D.

[0118] Example 3

[0119] The preparation method of Example 3 is basically the same as that of Example 1, except that: the long radius of the core layer prepared in Example 3 is 5.3 mm, and the short radius is 4.6 mm;

[0120] The long radius of the elliptical rope is 5.5 mm and the short radius is 4.8 mm;

[0121] The designed hot pressing groove has a long radius of 6.70 mm and a short radius of 3.6 mm.

[0122] Example 4

[0123] The preparation method of Example 4 is substantially the same as that of Example 1, except that the veil of Example 4 is 100D / 36F nylon filament with 200 twists.

[0124] Example 5

[0125] The preparation method of Example 5 is substantially the same as that of Example 1, except that, in Example 5, no water washing step is performed after the oval rope is subjected to thermal sublimation printing.

[0126] Example 6

[0127] The preparation method of Example 6 is basically the same as that of Example 1, except that: during the thermal sublimation printing hot stamping, the hot stamping temperature is 170° C. to 175° C., and the other conditions remain unchanged.

[0128] Example 7

[0129] The preparation method of Example 7 is basically the same as that of Example 1, except that: when performing thermal sublimation printing hot stamping, the single hot stamping time is 10 seconds, the total hot stamping time is 15-20 seconds, and the single stroke length is 750mm-1000mm.

[0130] Example 8

[0131] The preparation method of Example 8 is basically the same as that of Example 1, except that: when performing thermal sublimation printing hot stamping, the single hot stamping time is 1 s, the total hot stamping time is 15-20 s, and the single stroke length is 75-100 mm.

[0132] Example 9

[0133] The preparation method of Example 9 is substantially the same as that of Example 1, except that: the long radius of the core layer prepared in Example 4 is 4.5 mm, and the short radius is 3.4 mm;

[0134] The long radius of the elliptical rope is 4.7 mm and the short radius is 3.6 mm;

[0135] The long radius of the ellipse of the cross section of the hot pressing groove of the hot pressing equipment is designed to be 5.6 mm, and the short radius is 2.7 mm.

[0136] Example 10

[0137] The preparation method of Example 10 is substantially the same as that of Example 1, except that: Example 10 uses 150D / 36F polyester to replace the absorbent cotton and absorbent pure linen in Example 1.

[0138] The test results of the printed oval ropes prepared in Examples 1 to 5 are shown in Table 1 below:

[0139] Table 1

[0140]

[0141]

[0142] The veil in Example 4 is 100D / 36F, 200-twist nylon filament, and the resulting printed oval rope has inferior color fastness to that of the printed oval rope in Example 1.

[0143] In Example 5, after the oval rope is subjected to thermal sublimation printing treatment and no water washing treatment is performed, the color fastness of the printed oval rope obtained is not as good as that of the printed oval rope in Example 1.

[0144] The test results of the printed oval ropes prepared in Examples 6 to 10 are shown in Table 2 below:

[0145] Table 2

[0146]

[0147]

[0148] In Example 6, the sublimation printing was performed at a low temperature of 170°C to 175°C. While the printed pattern on the surface of the oval rope was complete, the color was lighter and the clarity was inferior to that of the print in Example 1. This is because when the sublimation printing temperature is lowered, the temperature is insufficient to completely transfer the ink from the sublimation transfer paper to the surface of the oval rope, resulting in a very light color.

[0149] In Example 7, the single ironing time is 10 seconds, which is longer than that of Example 1. The obtained printing pattern is complete, but there are defects in which some areas of the printing pattern are blurred.

[0150] In Example 8, the single ironing time is 1s, and the printed pattern on the surface of the elliptical rope is complete and has no color difference, but the clarity of the printed pattern is lower than that of Example 1; and the number of ironing times is more than that of Example 1, resulting in a relatively complicated printing process.

[0151] In Example 9, the long radius of the ellipse in the cross section of the elliptical rope is 4.70 mm, and the short radius is 3.6 mm. The difference between the long and short radii of the cross section of the elliptical rope exceeds 0.8 mm, resulting in a flatter elliptical rope. During hot pressing, the elliptical rope is easily further flattened, resulting in indentation defects on both sides of the surface of the elliptical rope.

[0152] In Example 10, 150D / 36F polyester is used to replace the absorbent cotton and absorbent pure in Example 1 as the core layer material. When the surface of the elliptical rope is subjected to thermal sublimation printing treatment, the polyester becomes soft at a high temperature of 200°C. When subjected to pressure, it deforms greatly and is easily deformed by stretching, resulting in easy indentation.

[0153] Comparative Example 1

[0154] The preparation method of Comparative Example 1 is basically the same as that of Example 1, except that: Comparative Example 1 omits the step of soaking the absorbent cotton and the absorbent pure linen in the water-soluble emulsifier of the thermal expansion agent, and directly uses the absorbent cotton and the absorbent pure linen to prepare the core layer.

[0155] Comparative Example 2

[0156] The preparation method of Comparative Example 2 is basically the same as that of Example 1, except that: the long radius of the elliptical rope core layer is 2.35 mm, and the short radius is 2.20 mm; the long radius of the prepared elliptical rope is 2.55 mm, and the short radius is 2.25 mm.

[0157] Comparative Example 3

[0158] The preparation method of Comparative Example 3 is substantially the same as that of Example 1, except that the elliptical rope prepared in Comparative Example 3 has a long radius of 2.45 mm and a short radius of 2.20 mm.

[0159] Comparative Example 4

[0160] The preparation method of Comparative Example 4 is basically the same as that of Example 1, except that the long radius of the ellipse of the cross section of the hot pressing groove of the hot pressing equipment is designed to be 2.25 mm, and the short radius is 1.90 mm.

[0161] The test results of the printed oval ropes prepared in Comparative Examples 1 to 4 are shown in Table 3 below:

[0162] Table 3

[0163]

[0164]

[0165] As can be seen from Table 3, the oval rope prepared in Comparative Example 1 did not add a thermal expansion agent. During the thermal sublimation printing process, the oval rope shrank and could not form a pressure difference with the hot pressing tank, resulting in unclear printing, incomplete printing patterns on the surface of the oval rope, and color differences.

[0166] It can be seen from Comparative Examples 2 to 4 that when the area and circumference of the cross-section of the elliptical rope and the cross-section of the hot stamping groove do not satisfy the relationship of "the cross-sectional area of the elliptical rope is 5% to 13% larger than the cross-sectional area of the hot stamping groove; the circumference of the cross-sectional area of the elliptical rope is 0.5% to 2.7% smaller than the circumference of the cross-sectional area of the hot stamping groove", the elliptical rope will cause printing defects such as indentation, unclear printing, and light color and color difference during thermal sublimation printing.

[0167] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0168] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A method for preparing a printed oval rope, characterized in that: The steps include: Prepare a core covering layer; the core covering layer includes core covering yarn and thermal expansion agent; A surface layer is formed on the surface of the core layer to obtain an elliptical rope; Performing thermal sublimation printing on the surface of the oval rope to obtain a printed oval rope; The heat sublimation printing process includes performing a hot stamping process on the oval rope in a hot stamping device; The ironing device includes an ironing assembly, wherein the ironing assembly includes a first ironing piece having a first groove and a second ironing piece having a second groove, wherein the first groove and the second groove cooperate with each other to form an ironing groove having an elliptical cross section; During the ironing treatment, the oval rope is placed in the ironing tank; the cross-sectional area of the oval rope is 5% to 13% larger than the cross-sectional area of the ironing tank; the cross-sectional perimeter of the oval rope is 0.5% to 2.7% smaller than the cross-sectional perimeter of the ironing tank; The pressing temperature of the hot pressing treatment is 180°C to 225°C. The hot pressing treatment includes multiple hot pressing operations using the hot pressing component. The hot pressing time of each hot pressing operation is 1.5s to 7.5s. The travel length of the elliptical rope relative to the hot pressing component between two adjacent hot pressing operations is 5% to 35% of the length of the hot pressing tank. The core-spun yarn includes cotton yarn and linen yarn, and the mass ratio of the cotton yarn to the linen yarn is 100:(0.5-2); The surface layer includes a veil, and the veil is a polyester yarn; The cross section of the core layer is elliptical, the long radius of the cross section of the core layer is 2.0mm to 6.5mm, and the short radius of the cross section of the core layer is 1.8mm to 5.8mm; the difference between the long radius and the short radius of the cross section of the core layer is 0.2mm to 0.8mm.

2. The method for preparing a printed oval rope according to claim 1, characterized in that: In parts by weight, the core-spun layer comprises 96 to 99 parts of core-spun yarn and 1 to 4 parts of thermal expansion agent.

3. The method for preparing the printed oval rope according to claim 2, characterized in that: The thermal expansion agent is loaded inside and on the surface of the core-spun yarn.

4. The method for preparing a printed oval rope according to claim 1, characterized in that: The printed oval rope meets at least one of the following conditions: (1) The cotton yarn is absorbent cotton yarn; (2) The linen yarn is degreased linen yarn; (3) The fineness of the cotton yarn and the linen yarn is independently 20S / 2 to 60S / 2; (4) The face yarn is a polyester yarn with a fineness of 100D to 300D and a twist number of 150 to 200.

5. The method for preparing a printed oval rope according to any one of claims 1, 3 to 4, characterized in that: The long radius of the cross section of the printed elliptical rope is 2.2 mm to 6.8 mm, and the short radius of the cross section of the printed elliptical rope is 2.0 mm to 6.2 mm.

6. The method for preparing a printed oval rope according to any one of claims 1, 3 to 4, characterized in that: After the thermal sublimation printing process, the method further includes a step of washing the printed oval rope; the washing liquid used in the washing process includes water and polyester-cotton soap detergent; the washing temperature is 78° C. to 82° C.; and the washing time is 30 minutes to 45 minutes.

7. A printed oval rope prepared by the method for preparing a printed oval rope according to any one of claims 1 to 6.

8. The printed oval rope according to claim 7, characterized in that: The invention comprises a core-spun layer and a surface layer arranged on the outer surface of the core-spun layer; the core-spun layer comprises 96 to 99 parts of core-spun yarn and 1 to 4 parts of thermal expansion agent by weight; and the surface layer has printing.

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