A dynamic functional fabric that can respond to changes in body surface microenvironment and its production method

Abstract

The present invention discloses a dynamic functional fabric that can respond to changes in the body's surface microenvironment and its production method. The fabric has a concave-convex striated texture and includes a front comb and a back comb; the front comb is woven from ultrafine denier brocade wrapped in spandex; the back comb is woven from spandex; the fabric fibers are hydrogen-bonded with a temperature-regulating agent and / or a softener; the temperature-regulating agent is prepared from temperature-sensitive polycaprolactone and hydrophilic polyethylene oxide as basic raw materials; and the softener is a silane softener. By incorporating dynamic temperature regulation into the fabric, the present invention dynamically adjusts the body's sensation when the external temperature changes, thereby better meeting various market needs.

Description

Technical Field

[0001] The present invention relates to a dynamic functional fabric that can respond to changes in the body surface microenvironment and a production method thereof, belonging to the technical field of intelligent temperature-controlled textile fabrics. Background Art

[0002] Research on temperature-regulating textiles has achieved remarkable success both domestically and internationally. The United States was the first country to conduct research on temperature-regulating textiles, initially focusing on the moon landing program. In 1988, it successfully developed the Outlast phase-change material. After 1994, temperature-regulating textiles gradually became commercially available, with their performance continuously improving. Currently, the most advanced is Ureatech, a polyurethane-coated temperature-regulating fabric developed by the US company Polytech. Research on temperature-regulating textiles in my country is relatively new. In 2003, Baoding Xiongya Textile Group and Ambers International Group of the US successfully developed phase-change temperature-regulating Roco yarn, producing the first "warm in winter, cool in summer" clothing in China.

[0003] As people place increasing emphasis on comfort and a sense of technology, consumers are no longer solely concerned with color matching, price, and style when purchasing clothing. Whether the fabric meets certain functional requirements has also become an important selection criterion. In recent years, tight, stretchy yoga clothing has become increasingly popular among consumers. It's not only used in yoga exercises, but has also become increasingly fashionable, significantly increasing the demand for fabrics and their popularity. During exercise, the body's microenvironmental temperature rises, the skin sweats, and overheating creates a barrier to the body's natural ability to dissipate heat. Therefore, increasing breathability when the body overheats increases the evaporation rate of moisture from the surface. When the ambient temperature drops and the body becomes cold, reducing interfiber gaps slows heat loss from the fabric. A certain degree of temperature regulation is crucial to improving the comfort of yoga clothing.

[0004] The mainstream functional yoga pants fabrics on the market are typically conventional nylon-spandex warp-knitted plain fabrics or weft-knitted plain fabrics with moisture-wicking additives. However, these materials are more suitable for summer. Furthermore, warp-knitted plain fabrics are relatively smooth, so when sweating, the fabric adheres tightly to the skin, resulting in a tight, sticky feel. Furthermore, as the sweat cools, the perceived body temperature drops sharply, creating a strong sense of dampness and chill.

[0005] In recent years, research on smart temperature-control textiles has mostly focused on microcapsule phase change materials, which are obtained by encapsulating phase change materials using microcapsule technology. Sarier et al. used a mixture of polyethylene glycol and polyacrylonitrile to obtain a phase change material with a latent heat value of 126 J / g. Li Shoupeng et al. used ultraviolet light in-situ polymerization to prepare a phase change material with good thermal stability and cooling performance. Li et al. sewed large capsules made of n-octadecane microcapsule phase change material to clothing, which can quickly transfer heat from the human body, thereby maintaining the body's thermal comfort. However, phase change materials have certain problems such as corrosiveness, easy phase change separation and flammability. The unevenness and possibility of rupture of microcapsules pose certain risks to human safety. Therefore, finding smart temperature-control textile materials that are both safe and stable in function has become the main direction of current research. Summary of the Invention

[0006] The present invention provides a dynamic functional fabric that can respond to changes in the body surface microenvironment. The temperature regulating auxiliary agent Temperature A is used to finish a warp-knitted high-elastic fabric of moderate thickness, which can regulate the temperature within a certain range and is suitable for wear in three seasons. The warp-knitted double-comb full-threaded ultra-high-elastic fabric on four sides is woven to form a concave and convex horizontal grain texture fabric surface, reducing the contact points between the skin and the fabric in hot and humid environments and improving physical comfort. The addition of the dynamic temperature regulation function enables it to dynamically adjust the body sensation when the external temperature changes, which can better meet the various needs of the market.

[0007] The technical solution adopted in the present invention is:

[0008] A dynamic functional fabric that can respond to changes in the microenvironment of the body surface, having a concave-convex textured surface, the fabric comprising a front comb and a back comb; the front comb is woven from ultra-fine denier brocade wrapped in spandex; the back comb is woven from spandex; the fabric fibers of the fabric are bonded to a temperature regulating agent and / or a softener via hydrogen bonds, and the structural formula of the temperature regulating agent is shown in formula (1):

[0009]

[0010] The softener is a silane softener.

[0011] As a preferred embodiment of the present invention, the front comb is a warp satin weave; the back comb is an open heavy warp weave.

[0012] As a preferred embodiment of the present invention, in the fabric, the content ratio of nylon to spandex is 55-65:35-45.

[0013] As a preferred embodiment of the present invention, the softener is a polysiloxane softener.

[0014] As a preferred embodiment of the present invention, the temperature regulating agent is formed by cross-linking polyethylene oxide and polycaprolactone.

[0015] As a preferred embodiment of the present invention, the specific preparation method of the temperature regulating auxiliary agent is as follows:

[0016] Polyethylene oxide (PEO) and polycaprolactone (PCL) are added into a reactor containing toluene in a mass ratio of 2 to 3:1, and then stirred and heated. After the temperature rises to 65-80°C, hexamethylene diisocyanate (HDI) is added at a mass ratio of 2-5% of the total mass of polyethylene oxide and polycaprolactone. After stirring and heating to 90-95°C, a catalyst is added at a mass ratio of 0.3-1% of the total mass of polyethylene oxide and polycaprolactone to carry out a catalytic reaction. After keeping the temperature and stirring for 1-2 hours, the toluene is evaporated off by reduced pressure distillation.

[0017] The production method of the above-mentioned dynamic functional fabric that can respond to changes in the body surface microenvironment includes a textile process, a dyeing and fixing process, and a padding and finishing process;

[0018] The textile process is as follows: using ultra-fine denier brocade wrapped in spandex as the front combed yarn of the fabric, using spandex as the back combed yarn of the fabric, and knitting the front and back combed yarns into a four-sided ultra-high elastic fabric by using a warp knitting double comb full-thread method;

[0019] The dyeing and fixing process comprises the following steps: fabric inspection → open width refining → drying → pre-forming → refining before overflow dyeing → overflow dyeing and fixing → drying;

[0020] The padding finishing process comprises the following steps: the dyed and fixed fabric is passed through a padding finishing liquid by dipping and padding, the padding finishing liquid is applied to the dyed fabric, and then the fabric is shaped and dried; wherein the padding finishing liquid contains a temperature regulating agent and a softener.

[0021] As a preferred embodiment of the present invention, in the textile process, the front-combed yarn ultrafine denier brocade wrapped with spandex is used as a warp satin padding yarn, and the back-combed yarn spandex is used as an open heavy warp flat padding yarn to form a concave and convex horizontal stripe texture appearance on the fabric.

[0022] As a preferred embodiment of the present invention, the padding finishing liquid is an aqueous solution of a temperature regulating agent and a softener, wherein the content of the temperature regulating agent is 30-50 g / L; the content of the softener is 2 g / L.

[0023] The beneficial effects of the present invention are:

[0024] 1. Use a water-soluble temperature-regulating agent for functional finishing. The temperature-regulating agent is a polyester non-ionic agent made from temperature-sensitive polycaprolactone (PCL) and hydrophilic polyethylene oxide (PEO). The synergistic effect of the polyoxyethylene segments in the agent and water provides the agent with hydrophilicity and water conductivity. Furthermore, the temperature-sensitive PCL segments can affect the size of gaps in the fabric through their thermal expansion and contraction properties, enabling the fabric to interact with and dynamically respond to changes in body temperature.

[0025] 2. Use double elastic yarn to warp knit with double combs to weave four-sided ultra-high elastic fabric. The front comb is used to make brocade-wrapped spandex to make satin warp yarn, and the back comb is used to make single spandex yarn to make open heavy warp flat yarn, forming a concave and convex horizontal texture fabric appearance.

[0026] 3. Before finalizing, the dyed fabric is passed through a padding tank and the padding finishing liquid is applied one dip and one padding at a time. The padding finishing liquid is then applied to the dyed fabric, causing the molecules to cross-link with the fabric fibers, giving the fabric the ability to dynamically respond to temperature. After 10 washes, the temperature-regulating effect is still maintained without weakening. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the 3D structure of a dynamic functional fabric that can respond to changes in the body surface microenvironment;

[0028] Figure 2 Dyeing and fixation curves of dynamic functional fabrics that can respond to changes in the body surface microenvironment;

[0029] Figure 3 is the equilibrium swelling ratio curve of Temperature A;

[0030] Figure 4 Schematic diagram of the bonding between Temperature A and silane softener and fabric fibers. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] This embodiment is a method for producing a dynamic functional fabric that can respond to changes in the body surface microenvironment, and the steps are as follows.

[0033] Textile Technology

[0034] The fabric uses ultra-fine denier brocade wrapped with spandex as the front-combed yarn of the fabric, and spandex as the back-combed yarn of the fabric. Due to the large difference in elasticity of the two groups of yarns, different warping machines and warping processes are selected respectively. The organizational structure is: spandex is used as the back-combed GB2, and an open heavy warp structure is adopted. The advantages of this structure are: the use of fine denier spandex for full wear maintains the delicate feel of the fabric without increasing the heaviness of the product, while enhancing the elastic modulus of the fabric, so that the human body has a fixed and body-shaping effect on the muscles when wearing it for exercise; the front-combed GB1 uses ultra-fine denier brocade wrapped with spandex and adopts a warp satin structure. This structure is between warp flat and warp velvet. It is softer than warp flat and relatively lacks the hairy feel of warp velvet. At the same time, it has a sense of design and is combined with the heavy warp structure to achieve a perfect arbitrary cutting effect.

[0035] The front and back combed yarns are woven into a four-sided ultra-high elastic fabric using a double comb warp knitting bar (the fabric structure diagram is as follows Figure 1 As shown in the figure, the front combed brocade wrapped with spandex is used to make the warp satin yarn, and the back combed single spandex yarn is used to make the open heavy warp flat yarn. The concave and convex horizontal texture formed makes the fabric three-dimensional and has more micropores, providing space for functional finishing additives.

[0036] The fabric contains 59% nylon and 41% polyester.

[0037] Dyeing and fixing process

[0038] To ensure the subsequent fabric finish and the effectiveness of functional additives, a double refining process is used to remove oil from the yarn. Due to the post-refining pre-setting process, the fabric still retains a certain amount of liquid, which, under the influence of gravity, creates an uneven surface. Furthermore, the high spandex content does not fully relax after conventional open-width washing, which can easily lead to uneven edges and centering during subsequent dyeing. Therefore, a drying process prior to pre-setting is added.

[0039] The conventional dyeing and fixing process is: fabric inspection → refining → pre-forming → dyeing and fixing → inspection;

[0040] The new process adopted by the present invention is: fabric inspection → open-width refining → drying → pre-forming → refining before overflow dyeing → overflow dyeing fixation → inspection (except for the specific introduction part, the other processes involved in the process are commonly used in the prior art and will not be repeated here).

[0041] Thoroughly removing the oil can provide a good environment for subsequent dyeing and temperature control finishing.

[0042] The dyeing and fixing process is as follows Figure 2As shown, by setting three heating stages at 60, 80, and 100°C, the dye is fully absorbed throughout the dyeing process and color fringing is minimized. Furthermore, due to the high spandex content of this product, the temperature was raised to 100°C and held for one hour to ensure color yield during the heat preservation process. The color fixation process also uses high-temperature fixation, with the temperature raised to 80°C and held for 20 minutes, achieving a good fixation rate for darker products.

[0043] Padding finishing process

[0044] Temperature A is used as a functional finishing agent to enhance the added value of the fabric. Temperature A is a colorless, transparent, non-ionic polymer made from temperature-sensitive polycaprolactone (PCL) and hydrophilic polyethylene oxide (PEO). Its structural formula is shown in formula (1):

[0045]

[0046] The specific preparation method is as follows: polyethylene oxide (PEO) and polycaprolactone (PCL) are added into a reactor containing toluene in a mass ratio of 2 to 3:1, and then stirred and heated. After the temperature rises to 65-80°C, hexamethylene diisocyanate (HDI) is added at a mass ratio of 2-5% of the total mass of polyethylene oxide and polycaprolactone. After stirring and heating to 90-95°C, a catalyst is added at a mass ratio of 0.3-1% of the total mass of polyethylene oxide and polycaprolactone to carry out a catalytic reaction. After keeping the temperature and stirring for 1-2 hours, the toluene is evaporated off by reduced pressure distillation.

[0047] In the temperature-regulating agent, the synergistic effect of the polyoxyethylene chain segment and moisture can provide the agent with hydrophilicity and water conductivity. On the other hand, the temperature-sensitive PCL chain segment can affect the size of the gaps in the fabric through its thermal shrinkage and cold expansion properties, enabling the fabric to interact with body temperature and dynamically respond to changes in body temperature.

[0048] The softener is a silane softener, and its structural formula is shown in formula (2):

[0049]

[0050] According to the final content of Temperature A auxiliary agent 40g / L, silane softener 2g / L, the temperature regulating auxiliary agent, softener and water are prepared into a padding finishing solution. The dyed and fixed fabric is passed through the padding finishing solution by a one-dip and one-pad method to make the padding finishing solution finish on the dyed fabric, and then it is shaped and dried.

[0051] like Figure 3The figure shows the equilibrium swelling ratio curve of Temperature A. The ESR equilibrium swelling ratio is the ratio of the volume of the cross-linked polymer after the swelling reaches equilibrium at a certain temperature to the volume before swelling. The equilibrium swelling ratio is larger before 25°C, indicating that the molecular volume is larger, filling the fiber gaps better, and cross-linking with the fabric to form a stable structure, reducing body surface heat dissipation, thereby slowing down body temperature loss. There is a significant downward trend between 30°C and 35°C, indicating that its molecular volume has significantly decreased, leaving gaps between fibers, accelerating water evaporation, increasing body surface heat dissipation, and making the body feel cool and comfortable. In addition, Temperature A and silane softener can be combined with fabric fibers through hydrogen bonds (such as Figure 4 As shown in the figure, it enables the fabric to interact and dynamically respond to body temperature when the ambient temperature changes, while further enhancing the softness and comfort of the fabric.

[0052] Main technical performance indicators

[0053] The finished fabric has been tested by the National Textile Product Quality Supervision and Inspection Center (Fujian), and all indicators meet the Class B requirements specified in FZ / T74005-2016 "Knitted Yoga Wear" and GB 18401-2010 "National Textile Product Basic Safety Technical Specifications".

[0054] The intelligent temperature control test results meet the Q / HeiQ CN 001-2021 "Intelligent Temperature Control Functional Textiles" corporate standard of Haiyi Ke (China) Materials Technology Co., Ltd.

[0055] The above is only a preferred embodiment of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A dynamic functional fabric that can respond to changes in the body surface microenvironment, having a concave and convex textured surface, characterized in that: The fabric comprises a front comb and a back comb; the front comb is woven from ultra-fine denier brocade wrapped in spandex; the back comb is woven from spandex; the fabric fibers of the fabric are bonded with a temperature regulating agent and a softener through hydrogen bonds, and the structural formula of the temperature regulating agent is shown in formula (1): (1)； The softener is a polysiloxane softener; The specific preparation method of the temperature regulating auxiliary agent is as follows: Polyethylene oxide (PEO) and polycaprolactone (PCL) are added into a reactor containing toluene in a mass ratio of 2-3:1, and then stirred and heated. After the temperature rises to 65-80°C, hexamethylene diisocyanate (HDI) is added at a mass ratio of 2-5% of the total mass of polyethylene oxide and polycaprolactone. After stirring and heating to 90-95°C, a catalyst is added at a mass ratio of 0.3-1% of the total mass of polyethylene oxide and polycaprolactone to carry out a catalytic reaction. After keeping the temperature and stirring for 1-2 hours, the toluene is evaporated off by reduced pressure distillation.

2. The dynamic functional fabric that can respond to changes in the body surface microenvironment according to claim 1, characterized in that: The front comb is a warp satin weave; the back comb is an open heavy warp weave.

3. The dynamic functional fabric that can respond to changes in the body surface microenvironment according to claim 1, characterized in that: In the fabric, the content ratio of nylon to spandex is 55-65:35-45.

4. The method for producing a dynamic functional fabric that can respond to changes in the body surface microenvironment according to claim 1, characterized in that: Including textile technology, dyeing and fixing technology and padding and finishing technology; The textile process is as follows: using ultra-fine denier brocade wrapped in spandex as the front combed yarn of the fabric, using spandex as the back combed yarn of the fabric, and weaving the front and back combed yarns into a four-sided ultra-high elastic fabric by using a warp knitting double comb full-thread method, i.e., fabric; The dyeing and fixing process comprises the following steps: fabric inspection → open width refining → drying → pre-forming → refining before overflow dyeing → overflow dyeing and fixing → drying; The padding finishing process comprises the following steps: the dyed and fixed fabric is passed through a padding finishing liquid by dipping and padding, the padding finishing liquid is applied to the dyed fabric, and then the fabric is shaped and dried; wherein the padding finishing liquid contains a temperature regulating agent and a softener.

5. The method for producing a dynamic functional fabric that can respond to changes in the body surface microenvironment according to claim 4, characterized in that: In the textile process, the front-combed yarn ultrafine denier brocade wrapped with spandex is used as a warp satin yarn, and the back-combed yarn spandex is used as an open heavy warp flat yarn to form a concave and convex horizontal stripe texture appearance on the fabric.

6. The method for producing a dynamic functional fabric that can respond to changes in the body surface microenvironment according to claim 4, characterized in that: The padding finishing liquid is an aqueous solution of a temperature regulating agent and a softener, wherein the content of the temperature regulating agent is 30-50 g / L; the content of the softener is 2 g / L.

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