Stain-resistant fabrics and their preparation methods

Abstract

This invention discloses a stain-resistant fabric and its preparation method, relating to the textile field. It aims to solve the problem of fabrics lacking waterproof and self-cleaning capabilities. The key technical points are: it includes a base layer and a surface layer prepared by melt spinning. The surface layer has several micro-protrusions facing away from the base layer. The interior of the tips of the micro-protrusions contains micro-powders that can be magnetically adsorbed. The surface of the micro-protrusions is covered with several nano-sized powders, forming a hydrophobic surface structure. This invention encloses air within the micro-protrusions and nano-sized powders, forming numerous tiny "air storage pools." When water droplets fall onto this composite rough surface, the contact area with the fabric surface is very small, and the contact angle is very high, thus enabling the fabric to achieve a waterproof and self-cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of textiles, and more specifically, to a stain-resistant fabric and a method for preparing the same. Background Technology

[0002] Fabric is the material used to make clothing. As one of the three essential elements of clothing, fabric not only interprets the style and characteristics of clothing, but also directly influences the color and shape of clothing, including knitted and woven fabrics.

[0003] Biomimetic functional fibers and fabrics are textiles with high-tech content obtained by mimicking the structure and working principles of the life systems of plants and animals in nature. In nature, the surface of lotus leaves has waterproof and self-cleaning functions. Research has found that the surface of lotus leaves has papillae and wax crystal structures. The surface of lotus leaves has many tiny protrusions with an average diameter of about 10μm. The surface of the micron-sized protrusions is covered with many nano-sized papillae with a diameter of about 200nm. The micron-sized protrusions and nano-sized papillae trap air between them, forming many tiny "air storage pools". When water droplets fall on such a composite rough surface, the contact area with the leaf surface is very small, only 2% to 3% of the area covered by the water droplet. Therefore, the contact angle is very high, reaching 160°, thus achieving the effect of waterproofing and self-cleaning.

[0004] Existing fabrics lack waterproof and self-cleaning capabilities, so this invention proposes a new solution that addresses this problem by mimicking the surface structure of a lotus leaf. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a dirt-resistant fabric and its preparation method.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a dirt-resistant fabric and its preparation method, comprising a base layer and a surface layer prepared by melt spinning, wherein the surface layer is provided with a plurality of micro protrusions disposed opposite to the base layer, wherein the interior of the top of the micro protrusions is provided with micro powder that can be magnetically adsorbed, and the surface of the micro protrusions is provided with a plurality of nano-sized powders, wherein the plurality of micro protrusions and the plurality of nano-sized powders form a hydrophobic surface structure.

[0007] The present invention is further configured such that the micro powder is micron-sized iron powder.

[0008] The present invention is further configured such that the nano-sized powder is a negative ion powder.

[0009] The present invention is further configured such that the surface layer can be any one of polyester layer, nylon layer, acrylic layer, vinylon layer, polypropylene layer and spandex layer.

[0010] A method for preparing a stain-resistant fabric includes the following steps:

[0011] S1 melts polymers to form a spinning melt;

[0012] S2 involves adding micro-powders to the spinning melt and stirring until homogeneous;

[0013] S3 is extruded through a spinneret into a liquid stream and then solidified into fibers.

[0014] S4 uses an oiler to oil the fibers and then winds them into shape;

[0015] S5 is formed by weaving yarns made from this fiber to form the surface layer;

[0016] S6 base layer woven molding;

[0017] S7 base layer and surface layer composite;

[0018] The S8 surface layer is heated and melted, and the micro powder is instantly adsorbed by a magnetic source, causing the micro powder to carry some of the molten material upward to form micro protrusions;

[0019] S9 sprinkles nano-sized powder on the surface of the micro-protrusions, so that the nano-sized powder adheres to the surface of the micro-protrusions;

[0020] S10 surface cooling, micro-protrusion shaping.

[0021] The present invention is further configured such that the magnetic source is an electromagnet.

[0022] The present invention is further configured such that step S2 can be performed by ultrasonic vibration of the spinning melt using an ultrasonic generator.

[0023] The present invention is further configured to include step S11 of shaking the fabric to cause the nanoscale powder that is not bound to the micro protrusions to fall off and be recycled.

[0024] In summary, the present invention has the following beneficial effects: Since the surface layer is prepared by melt spinning, it can melt when heated. When the surface layer is in a molten state, it can be magnetically attracted to micro-powders, thereby moving the micro-powders. The movement of the micro-powders can move the molten part of the surface layer that is bonded to them, thereby forming micro-protrusions on the surface of the surface layer. Since the surface layer is in a molten state, the nano-sized powder can be placed on the surface of the surface layer, and even the surface of the micro-protrusions can be coated with nano-sized powder. The micro-protrusions and nano-sized powders trap air in between, forming many tiny "air storage pools". When water droplets fall on such a composite rough surface, the contact area with the fabric surface is very small and the contact angle is very high, thereby enabling the fabric to achieve a waterproof and self-cleaning effect. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the present invention.

[0026] In the diagram: 1. Surface layer; 2. Base layer; 3. Micro protrusions; 4. Micro powder; 5. Nano-sized powder. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Example: A stain-resistant fabric, such as Figure 1 As shown, the structure includes a base layer 2 and a surface layer 1 prepared by melt spinning. Surface layer 1 is a polyester layer, and base layer 2 is a cotton fabric layer. Surface layer 1 and base layer 2 are compositely connected. Surface layer 1 has several micro-protrusions 3 facing away from base layer 2. The interior of the top of each micro-protrusion 3 contains micro-powder 4 that can be magnetically attracted. Specifically, the micro-powder 4 is micron-sized iron powder. The surface of each micro-protrusion 3 has several nano-sized powders 5. The micro-protrusions 3 and nano-sized powders 5 form a hydrophobic surface structure. Because surface layer 1 is prepared by melt spinning, it can melt when heated. Specifically, surface layer 1 is a polyester layer, which is polyester fiber. When polyester fiber is exposed to a high temperature of 258-263℃, the polyester fiber will melt. When surface layer 1 is in a molten state, the micro-powder 4 is magnetically attracted. The micro powder 4 is iron powder, which can be quickly attracted by magnetic force and moved. The movement of the micro powder 4 can move the molten part of the surface layer 1 that is bonded to it. Since the micro powder 4 is micron-sized iron powder, its small size can only move a small amount of molten material, thus forming micro protrusions 3 on the surface of the surface layer 1. Since the surface layer 1 is in a molten state, the nano-sized powder 5 can be placed on the surface of the surface layer 1 and bonded to it. The surface of the micro protrusions 3 can also be coated with nano-sized powder 5. The micro protrusions 3 and nano-sized powder 5 trap air between them, forming many tiny "air storage pools". When water droplets fall on such a composite rough surface, the contact area with the fabric surface is very small and the contact angle is very high, thus enabling the fabric to achieve a waterproof and self-cleaning effect.

[0029] In some embodiments, such as Figure 1 As shown, the surface layer 1 can be any one of nylon, acrylic, vinylon, polypropylene and spandex. These surface layers 1 are all woven from chemical fiber yarns and can all form a molten state at the corresponding temperature, which facilitates the molding of micro protrusions 3.

[0030] In some embodiments, such as Figure 1 As shown, the base layer 2 includes, but is not limited to, any one of the following: non-woven fabric layer, silk fabric layer, linen fabric layer, polyester fabric layer, nylon fabric layer, acrylic fabric layer, vinylon fabric layer, polypropylene fabric layer, spandex fabric layer, and blended fabric layer.

[0031] Furthermore, such as Figure 1 As shown, nano-grade powder 5 is a negative ion powder, which not only achieves the waterproof and self-cleaning effect of the fabric, but also releases negative ions. The release of negative ions can enhance the function of the cerebral cortex and mental activity, invigorate the spirit, improve work efficiency, and improve sleep quality. Negative ions can also strengthen the oxidation process in brain tissue, allowing it to obtain more oxygen. Negative ions have a significant vasodilatory effect, relieving arterial spasms and lowering blood pressure. They are also beneficial for improving heart function and myocardial nutrition, aiding in the recovery of patients with hypertension and cardiovascular diseases. Furthermore, negative ions slow down blood flow and prolong clotting time, increasing blood oxygen levels and facilitating oxygen transport, absorption, and utilization. Additionally, negative ions enter the body through the respiratory tract, improving lung capacity and function, thus making the fabric healthier.

[0032] The method for preparing the above-mentioned stain-resistant fabric includes the following steps:

[0033] S1 melts polymers to form a spinning melt;

[0034] S2 adds micro powder 4 to the spinning melt and stirs it evenly. Specifically, micro powder 4 is micron-sized iron powder, and the spinning melt can be ultrasonically vibrated by an ultrasonic generator. Stirring the spinning melt can make the micro powder 4 as evenly distributed as possible in the spinning melt, so that the micro powder 4 can be distributed in all parts of the spun yarn. Furthermore, the ultrasonic vibration of the spinning melt by the ultrasonic generator can further disperse the micro powder 4, making the micro powder 4 more evenly distributed in the spinning melt.

[0035] S3 is extruded through a spinneret into a liquid stream and then solidified into fibers. At this time, since micro-powders 4 are distributed in the liquid stream, multiple micro-powders 4 are distributed within the fibers.

[0036] S4 uses an oiler to oil the fibers and then winds them into shape;

[0037] S5 The yarn prepared from this fiber is woven to form the surface layer 1. Since multiple micro powders 4 are distributed in the fiber, the twisted yarn of the fiber is distributed with micro powders 4, and thus each part of the woven surface layer 1 is distributed with micro powders 4.

[0038] S6 base layer 2 is woven into shape;

[0039] S7 base layer 2 and surface layer 1 are composite;

[0040] The S8 surface layer 1 is heated and melted at a temperature between 258-263℃, allowing the polyester material surface layer 1 to melt and instantly attract the micro powder 4 through a magnetic source. This causes the micro powder 4 to carry some of the molten material upward to form micro protrusions 3. The magnetic source is an electromagnet. When the electromagnet is energized, it instantly generates magnetic force, which instantly attracts the iron powder 4. Then, when the power is turned off, the magnetic force is instantly lost, causing the micro powder 4 to stop moving instantly, preventing the micro powder 4 from detaching from the surface layer 1 and facilitating the formation of the micro protrusions 3.

[0041] S9 sprinkles nano-sized powder 5 on the surface of the micro protrusion 3, so that the nano-sized powder 5 adheres to the surface of the micro protrusion 3. The nano-sized powder 5 is negative ion powder. Since the micro protrusion 3 is still in a molten state, when the nano-sized powder 5 falls on the surface layer 1, it can be embedded in the molten surface layer 1, so that some of the nano-sized powder 5 can be embedded in the surface of the micro protrusion 3, so that the surface of the micro protrusion 3 can be attached with nano-sized powder 5.

[0042] S10 surface layer 1 cooling, micro protrusions 3 shaping;

[0043] S11 shakes the fabric to cause the nano-powder 5 that is not bonded to the micro protrusions 3 to fall off and be recycled. Through this step, the nano-powder 5 that is not bonded to the surface layer 1 can be shaken off, thereby saving raw materials and reducing costs.

[0044] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method of making a stain resistant fabric, characterized by: The dirt-resistant fabric includes a base layer and a surface layer prepared by melt spinning. The surface layer has a number of micro protrusions facing away from the base layer. The interior of the top of the micro protrusions is provided with micro powder that can be magnetically adsorbed. The surface of the micro protrusions is provided with a number of nano-sized powders. The micro protrusions and nano-sized powders form a hydrophobic surface structure. The preparation method of this stain-resistant fabric includes the following steps: S1 melts polymers to form a spinning melt; S2 involves adding micro-powders to the spinning melt and stirring until homogeneous; S3 is extruded through a spinneret into a liquid stream and then solidified into fibers. S4 uses an oiler to oil the fibers and then winds them into shape; S5 is formed by weaving yarns made from this fiber to form the surface layer; S6 base layer woven molding; S7 base layer and surface layer composite; The S8 surface layer is heated and melted, and the micro powder is instantly adsorbed by a magnetic source, causing the micro powder to carry some of the molten material upward to form micro protrusions; S9 sprinkles nano-sized powder on the surface of the micro-protrusions, so that the nano-sized powder adheres to the surface of the micro-protrusions; S10 surface cooling, micro-protrusion shaping.

2. The method of claim 1, wherein: The magnetic source is an electromagnet.

3. The method of claim 1, wherein: In step S2, the spinning melt is subjected to ultrasonic vibration by an ultrasonic generator.

4. The method of making a stain resistant fabric of claim 1, wherein: It also includes step S11, shaking the fabric to cause nanoscale powder that is not bound to the micro-protrusions to fall off and be recycled.

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