A physical non-ironing cotton shirt

Abstract

The utility model discloses a kind of physical no-iron cotton shirts, comprising: main body, sleeve being set in the both sides of the main body, collar seat is set in the upper portion of the main body, hexagonal honeycomb framework layer is set in the back triangle area of the main body, the honeycomb width of the hexagonal honeycomb framework layer decreases from shoulder to waist gradient;Serpentine elastic channel is set in the elbow joint inside of the middle part of the sleeve;The utility model is designed by the honeycomb width of the hexagonal honeycomb framework of back triangle area gradually shrinking from shoulder to waist, disperses external force by the anisotropic mechanical properties of bionic honeycomb structure, its gradient stiffness distribution is matched with the movement amplitude of human scapula-waist, while keeping the natural drooping feeling of fabric, effectively inhibits the macroscopic wrinkle generation caused by limb movement.

Description

Technical Field

[0001] This utility model is a physically wrinkle-free cotton shirt, belonging to the field of shirt technology. Background Technology

[0002] Cotton shirts, as a classic clothing item, are widely used in business attire, casual wear, and workwear. Thanks to the moisture-wicking and breathable properties, softness against the skin, and natural drape of natural cotton fibers, they have become a top choice for consumers year-round. Their environmentally friendly and biodegradable characteristics, along with their versatility, make them both practical and fashionable in today's fast-paced lifestyle, allowing them to maintain a dominant position in the shirt market for a long time.

[0003] Traditional cotton shirts commonly suffer from wrinkle-proneness and poor wrinkle-free properties, primarily due to inherent structural defects in cotton fibers. The hydrogen bonds between cotton cellulose molecules are relatively weak, making them susceptible to breakage and recombination under external forces such as folding, friction, or moisture. This leads to rearrangement of the cellulose macromolecular chains, resulting in irreversible wrinkles.

[0004] Furthermore, cotton fibers have a low modulus of elasticity and poor resilience. After washing, the fibers absorb water, swell, and dry to set, exacerbating the accumulation of deformation. Although existing chemical wrinkle-free processes enhance the fiber structure through resin cross-linking, they present a trade-off between health and performance, such as formaldehyde release, fabric brittleness, and reduced breathability.

[0005] Meanwhile, traditional designs lack mechanisms to regulate dynamic stress distribution, such as in the armhole and collar stress concentration areas, making it difficult to eliminate local wrinkles and requiring frequent ironing and maintenance, which significantly reduces wearing convenience and product lifespan. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a physically wrinkle-free cotton shirt to solve the problems of the existing technology.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: A physically wrinkle-free cotton shirt includes: a main body, sleeves disposed on both sides of the main body, a collar seat disposed on the upper part of the main body, and a hexagonal honeycomb skeleton layer disposed in the triangular area of ​​the back of the main body, wherein the honeycomb width of the hexagonal honeycomb skeleton layer gradually decreases from the shoulder to the waist. A serpentine elastic channel is provided on the inner side of the elbow joint in the middle of the sleeve; The collar seat is embedded with a glass fiber reinforcement strip, and the radius of curvature of the glass fiber reinforcement strip is dynamically adjustable within a range of 35mm-45mm; The front panel of the main garment has a horizontal curvature radius of 100mm-150mm and a vertical curvature radius of 70mm-100mm. The armhole of the main garment is provided with 6-10 sets of radial stress relief grooves; The front panel on the front of the main garment body has two cotton layers arranged from the inside out, and a recovery layer disposed between the two cotton layers. The recovery layer is a bidirectional shape memory polyurethane fiber network layer.

[0008] As a further improvement, the honeycomb width in the hexagonal honeycomb skeleton layer is gradually reduced from 1.0mm-1.5mm at the shoulder to 0.5mm-0.8mm at the waist; The cell frame has a three-level gradient in unit size along the longitudinal direction: 8mm-10mm in the shoulder area, 6mm-8mm in the scapular area, and 4mm-6mm in the waist transition area. Stress buffer bands with a width of 0.2mm-0.4mm are provided between adjacent cells.

[0009] As a further improvement, the hexagonal honeycomb skeleton layer is made of polylactic acid / graphene composite material, with an elastic modulus that exhibits a gradient increase from 3.2 MPa to 5.6 MPa.

[0010] As a further improvement, the serpentine elastic channel incorporates a shape memory alloy wire with a diameter of 0.12mm-0.18mm, a channel width of 4-6mm, and an elongation of ≥130%.

[0011] As a further improvement, the collar is embedded with a glass fiber reinforcing strip with a thickness of 0.25mm-0.35mm, and its radius of curvature is dynamically adjustable within a range of 35-45mm.

[0012] As a further improvement, a wrinkle-reducing strip with a pre-strain value of 0.5%-0.8% is sewn into the seam of the two front flaps.

[0013] As a further improvement, the depth of the ventilation strip is 0.1mm-0.4mm, and the density of the ventilation strip is 10-15 strips / cm².

[0014] As a further improvement, the stress relief groove has a width of 0.4mm-0.6mm and a depth of 0.1mm-0.2mm.

[0015] As a further improvement, a bidirectional corrugated ventilation flap is provided at the underarm area between the main garment body and the sleeve. When the bidirectional corrugated ventilation flap is unfolded, several ventilation strips connecting the inside of the main garment body are exposed. When the bidirectional corrugated ventilation flap is closed, the ventilation strips connecting the inside of the main garment body are sealed.

[0016] As a further improvement, the bidirectional shape memory polyurethane fiber network layer has a phase change temperature of 42-46℃, a fiber diameter of 8-12μm, and a warp and weft interlacing density of 200-250 fibers / cm².

[0017] Beneficial effects: This invention utilizes a hexagonal honeycomb skeleton in the back triangle area with a gradually narrowing honeycomb width from the shoulder to the waist. By dispersing external forces through the anisotropic mechanical properties of the biomimetic honeycomb structure, its gradient stiffness distribution matches the range of motion of the human shoulder blade-waist area. While maintaining the natural drape of the fabric, it effectively suppresses the formation of macro-wrinkles caused by limb movements.

[0018] Meanwhile, the elbow serpentine elastic channel incorporates shape memory alloy wires and a high elasticity channel with an elongation rate of ≥130%, combined with glass fiber reinforcement strips embedded in the collar seat, forming a dual-modal recovery structure. The former generates rebound force through body temperature activation to eliminate dynamic wrinkles, while the latter utilizes material stiffness differences to achieve real-time self-correction of the collar shape, solving the problem of collar collapse caused by hydrogen bond rearrangement of cotton fibers in traditional shirts.

[0019] The bidirectional shape memory polyurethane fiber network in the front panel interlayer exhibits a shape recovery rate driven by body temperature. The phase transition response of its molecular chain segments is precisely coupled with the body temperature, and the intrinsic elasticity of the material counteracts the slippage deformation of the cellulose macromolecular chains, thereby inhibiting wrinkle formation. The radial stress relief grooves in the armhole disperse local stress radially through geometric design, reducing the stress concentration coefficient in traditional seam areas. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the front structure of a physically wrinkle-free cotton shirt according to this utility model.

[0022] Figure 2 This is a schematic diagram of the back structure of a physically wrinkle-free cotton shirt according to this utility model.

[0023] Figure 3 This is a partially enlarged structural diagram of the front of a physically wrinkle-free cotton shirt according to this utility model.

[0024] Figure 4 This is a partially enlarged structural diagram of the back of a physically wrinkle-free cotton shirt according to this utility model.

[0025] Figure 5 This is a partially enlarged structural diagram of the underarm area of ​​a physically wrinkle-free cotton shirt according to this utility model.

[0026] 1. Main garment body; 2. Sleeves; 3. Collar; 4. Back triangle area; 41. Hexagonal honeycomb skeleton layer; 21. Elbow joint; 211. Snake-shaped elastic channel; 212. Shape memory alloy wire; 31. Glass fiber reinforcement strip; 11. Front placket; 22. Armhole; 221. Stress relief groove; 12. Cotton layer; 13. Recovery layer; 14. Wrinkle-reducing strip; 15. Underarm area; 151. Two-way wave-shaped pleated ventilation panel; 152. Ventilation strip. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Reference Figure 1-5 As shown, a physical wrinkle-free cotton shirt includes: a main body 1, sleeves 2 disposed on both sides of the main body 1, a collar 3 disposed on the upper part of the main body 1, and a hexagonal honeycomb skeleton layer 41 disposed in the triangular area 4 on the back of the main body 1, wherein the honeycomb width of the hexagonal honeycomb skeleton layer 41 gradually decreases from the shoulder to the waist. A serpentine elastic channel 211 is provided on the inner side of the elbow joint 21 in the middle of the sleeve 2; The collar 3 is embedded with a glass fiber reinforcing strip 31, and the radius of curvature of the glass fiber reinforcing strip 31 is dynamically adjustable within a range of 35mm-45mm. The front panel 11 of the main garment body 1 has a horizontal curvature radius of 100mm-150mm and a vertical curvature radius of 70mm-100mm. The armhole portion 22 of the main garment body 1 is provided with 6-10 sets of radial stress relief grooves 221; Two cotton layers 12 and a recovery layer 13 disposed between the two cotton layers 12 are arranged sequentially from the inside to the outside on the front panel 11 of the main garment body 1. The recovery layer 13 is a bidirectional shape memory polyurethane fiber network layer.

[0030] The hexagonal honeycomb skeleton in the back triangle area 4 adopts a honeycomb width design that gradually narrows from the shoulder to the waist. By dispersing external forces through the anisotropic mechanical properties of the biomimetic honeycomb structure, its gradient stiffness distribution matches the range of motion of the human shoulder blade-waist. While maintaining the natural drape of the fabric, it effectively suppresses the generation of macro-wrinkles caused by limb movements.

[0031] Meanwhile, a shape memory alloy wire 212 and a high elasticity channel with an elongation rate of ≥130% are built into the serpentine elastic channel 211 at the elbow. Combined with the glass fiber reinforcement strip 31 embedded in the collar seat 3, a dual-modal recovery structure is formed. The former generates rebound force through body temperature activation to eliminate dynamic wrinkles, while the latter uses the difference in material stiffness to achieve real-time self-correction of the collar shape, solving the problem of collar collapse caused by hydrogen bond rearrangement of cotton fibers in traditional shirts.

[0032] The bidirectional shape memory polyurethane fiber network in the interlayer of the front panel 11 exhibits a shape recovery rate driven by body temperature. The phase transition response of its molecular chain segments is precisely coupled with the body temperature, and the intrinsic elasticity of the material counteracts the slippage deformation of the cellulose macromolecular chains, thereby inhibiting wrinkle formation. The radial stress relief grooves 221 in the armhole 22 disperse local stress radially through geometric design, reducing the stress concentration coefficient in traditional seam areas.

[0033] Its core advantages compared to existing technologies: Firstly, it has a wrinkle-free mechanism, breaking through the traditional chemical modification path that relies on formaldehyde resin cross-linking. It adopts physical structure enhancement and intelligent material response technology, avoiding fabric embrittlement, reduced breathability and health risks caused by chemical treatment. While achieving wrinkle-free operation, it maintains the natural moisture absorption of cotton fibers, with a moisture permeability of >980g / m² / 24h.

[0034] A three-tiered protection system consisting of macroscopic structure, mesoscopic network, and microscopic materials is constructed. The honeycomb skeleton achieves stress dispersion at the macroscopic scale, the recovery layer 13 provides fiber orientation adjustment at the mesoscopic scale, and the shape memory material ensures the recovery of molecular chains at the microscopic scale. The three work together to increase the wrinkle recovery angle to 278° in the warp and 265° in the weft, which is more than 35% higher than that of conventional wrinkle-free shirts.

[0035] Through gradient stiffness design, the integration of honeycomb porosity of 62%-78%, humidity-responsive glass fiber reinforcement strips 31, and moisture-wicking groove depth of 0.1-0.4mm, the shirt has active protection capabilities linked to temperature and humidity. In high-temperature and high-humidity environments >60%RH, the material phase change and microfluidic transport mechanisms are automatically activated, specifically enhancing the recovery efficiency of wrinkle-prone areas and solving the defect of traditional shirts having a sharp drop in wrinkle-free performance in humid environments.

[0036] The synergistic design of the bidirectional wave-shaped pleated ventilation strip 151 and the wrinkle-reducing strip 14 achieves dynamic stress release while maintaining the three-dimensional silhouette of the shirt. Compared with traditional fixed pleats or chemical stiffening treatments, it improves the comfort of the wearer and requires no ironing maintenance, significantly extending the product life cycle.

[0037] As a further improvement, the honeycomb width in the hexagonal honeycomb skeleton layer 41 is gradually reduced from 1.0mm-1.5mm at the shoulder to 0.5mm-0.8mm at the waist. The cell frame has a three-level gradient in unit size along the longitudinal direction: 8mm-10mm in the shoulder area, 6mm-8mm in the scapular area, and 4mm-6mm in the waist transition area. Stress buffer bands with a width of 0.2mm-0.4mm are provided between adjacent cells.

[0038] The hexagonal honeycomb skeleton layer 41 is made of polylactic acid / graphene composite material, and its elastic modulus shows a gradient increase from 3.2 MPa to 5.6 MPa.

[0039] Because the human shoulder has a high frequency of movement, such as raising the arm and twisting, a wider honeycomb structure can provide a larger space for elastic deformation, allowing local elongation of ≥25%, and avoiding wrinkles caused by dynamic stress concentration; the waist needs to maintain shape stability, and a narrow honeycomb structure can enhance compressive stiffness and increase elastic modulus by 30% by increasing porosity gradient by 62%-78%, thus suppressing gravity collapse during static suspension.

[0040] The unit size is divided into three levels: shoulder area (8-10mm), scapular area (6-8mm), and waist area (4-6mm). The large shoulder units are designed to meet the demands of large limb movements with a bending radius ≥50mm. The medium-sized units in the scapular area balance support and deformation coordination with a bending radius of 30-50mm. The small waist units provide enhanced shaping and a bending radius ≤30mm. This zoning design precisely couples the biomechanical response of the honeycomb skeleton with the kinematic characteristics of the human body, reducing the problems of excessive or insufficient local stiffness caused by traditional homogeneous structures.

[0041] The 0.2-0.4 mm stress buffer zone between adjacent zones, through a micron-level geometric transition such as a sawtooth boundary, transforms the abrupt change in modulus of the gradient structure into a continuous gradual change, reducing the stress concentration factor Kt from 3.2 to below 1.5. When external forces are applied to the boundary between zones, the buffer zone dissipates energy by increasing the strain energy density absorption rate by 40% through local buckling deformation, preventing crack propagation along the honeycomb skeleton and significantly extending the structural fatigue life. Tests show that after 10 cycles of loading... 4 Subsequent stiffness reduction is less than 5%.

[0042] A synergistic effect is achieved through a three-tiered structure: macroscopic gradient honeycomb width, mesoscopic partitioned unit size, and microscopic buffer stress buffer zone. The large honeycomb unit in the shoulder provides global deformation tolerance, the small honeycomb unit in the waist constrains local buckling, and the buffer zone acts as an energy dissipation node. This allows the shirt to maintain wrinkle suppression under complex loads such as bending and raising arm movements. Compared to traditional single-scale honeycomb structures, the wrinkle density is reduced by 62% without sacrificing the fabric's drape.

[0043] The three-level gradient design achieves a positioning accuracy of ±5μm through digital laser cutting, reducing material redundancy and decreasing the amount of honeycomb material used by 18% while ensuring structural accuracy. The stress buffer strip is embedded into the substrate using hot-pressing fusion technology, avoiding the use of additional adhesives. This maintains the natural feel of cotton fibers and increases the interfacial bonding strength between the honeycomb skeleton and the cotton matrix to a peel strength test value of 0.68N / mm², ensuring structural integrity after multiple washes.

[0044] The honeycomb layer uses a polylactic acid / graphene composite material. While polylactic acid, as a bio-based polymer, possesses good rigidity and processability, it is also brittle with an elongation at break of <5%. By adding 0.8-1.2% graphene nanosheets, the interfacial interaction between the two-dimensional sheet structure of graphene and the PLA molecular chains is utilized, increasing the tensile strength of the composite material to 110 MPa (compared to 60 MPa for pure PLA) and raising the elongation at break to 18%. This perfectly meets the dual requirements of the honeycomb skeleton for a high modulus gradient of 3.2-5.6 MPa and moderate ductility.

[0045] The intrinsic thermal conductivity of graphene, 5300 W / m·K, enables the composite material to achieve a thermal diffusivity of 1.2 × 10⁻⁻⁶. 7 The pure PLA concentration is 0.15 × 10⁻ m² / s. 7 Under body temperature of 32-34℃, it can quickly transfer heat to each area of ​​the honeycomb skeleton, triggering the phase change response of the serpentine channel of the shape memory alloy wire 212 and the bidirectional shape memory polyurethane of the recovery layer 13, realizing dynamic wrinkle elimination driven by "heat-deformation" coupling.

[0046] The π-π conjugated structure of graphene can form a hydrogen bond network with cotton cellulose molecules, generating a gradient expansion effect when humidity changes. When the relative humidity is >65%RH, the moisture absorption expansion rate of the composite material is 0.8%, triggering local buckling deformation of the honeycomb skeleton, actively releasing the stress accumulation of the cellulose molecular chains, and inhibiting wrinkle formation at the source. This property works synergistically with the humidity-responsive shape memory effect of the recovery layer 13, enabling the shirt to maintain the wrinkle-free performance of ISO 7 standard in humid environments.

[0047] The nano-tip effect and photocatalytic activity of graphene can destroy bacterial cell membranes, achieving an antibacterial rate of >99% against Escherichia coli. Combined with the hydrophobic properties of PLA, the honeycomb skeleton layer has a long-lasting antibacterial function, avoiding the microbial growth problem caused by traditional chemical wrinkle-free resins. It is especially suitable for long-term wear in high temperature and high humidity environments.

[0048] The serpentine elastic channel 211 has a built-in shape memory alloy wire 212 with a diameter of 0.12mm-0.18mm, a channel width of 4-6mm, and an elongation of ≥130%.

[0049] In this embodiment, the shape memory alloy wire 212, a nickel-titanium alloy wire such as NiTi within this diameter range, can generate up to 12% hyperelastic strain at a phase transformation temperature of 28-32°C, and has a tensile strength of 1500 MPa, capable of withstanding high-frequency bending stress at the elbow >10. 4 This method, while avoiding excessive local stiffness caused by excessive thickness (traditional elastic fibers with a diameter > 0.3mm are prone to stiffness), also avoids the problem of excessive stiffness in local areas caused by excessive thickness.

[0050] Furthermore, small-diameter alloy wires have a larger specific surface area; the surface area to volume ratio of 0.18 mm wire is 2.5 times that of 0.3 mm wire, which can accelerate the body temperature conduction and heating rate to 5℃ / s, shortening the martensitic phase transformation trigger time to 3-5 seconds and achieving real-time elimination of wrinkles.

[0051] This size allows for the embedding of elastic channels using laser welding or thermoforming technology, avoiding damage to the cotton fiber structure. Traditional sewing processes can easily tear the fabric due to metal wires larger than 0.2mm.

[0052] Since the elbow joint 21 bends at an angle ranging from 0° to 150°, the corresponding skin stretch is approximately 28%. The 4-6mm wide serpentine channel can provide 3.2-4.8mm of radial deformation space when the alloy wire is stretched to 130%, fully covering the fabric stretch requirements for elbow movement. Actual tests show that stress concentration occurs in the traditional 3mm channel when bent at 120°.

[0053] The lateral displacement freedom of the alloy wire within a 6mm wide channel is ±1.5mm, which allows the phase change heat to be transferred more evenly to the surrounding cotton fibers. The temperature gradient is <2℃ / mm, avoiding cellulose degradation caused by local overheating. Traditional narrow channels are prone to thermal stress >5℃ / mm.

[0054] When the channel width exceeds 6mm, the fabric fit will be reduced and the contact area will be reduced by 15%. If it is less than 4mm, the effective recovery stroke of the alloy wire will be shortened by 40% due to the limitation of the elastic path. The 4-6mm range achieves the optimal balance between functionality and ergonomics.

[0055] By controlling the martensitic phase transformation hysteresis ΔT of NiTi alloy to 10-15℃, 130% recoverable deformation is achieved at body temperature (32-34℃), compared to <80% of conventional elastic fibers. When the elbow is bent, the alloy wire is stretched to 130% and stores 0.8J / mm³ of elastic potential energy. Upon release, this energy drives the fabric to rebound rapidly, eliminating dynamic wrinkles in less than 2 seconds.

[0056] Because the cold rolling strengthening process refines the alloy grain size to <50nm, after 10 5 After one stretch-recovery cycle, the residual strain is only 2.3% of that of conventional spring steel wire (>15%), ensuring that the shirt retains 92% of its recovery performance after 80 washes.

[0057] Furthermore, the alloy wire surface undergoes micro-arc oxidation treatment to form a 500nm porous layer, which can adsorb cotton cellulose molecular chains. When the relative humidity is >60%, the interfacial stress transfer efficiency is enhanced through hydrogen bonding, and the interfacial shear strength is increased to 38MPa, solving the problem of weak bonding between traditional metal fibers and cotton matrix.

[0058] The collar 3 is embedded with a glass fiber reinforcing strip 31 with a thickness of 0.25mm-0.35mm, and its radius of curvature is dynamically adjustable within a range of 35-45mm. A wrinkle-reducing strip 14 with a pre-strain value of 0.5%-0.8% is sewn into the seam between the two front flaps 11.

[0059] The collar seat 3 and the glass fiber reinforcing strip 31, within this thickness range, contain E-glass fibers with a volume fraction of 60%, exhibiting optimal stiffness-flexibility matching. At a thickness of 0.25mm, the bending stiffness is 0.42 N·m, meeting the collar shaping requirements, while allowing for dynamic adjustment of the elastic deformation range of 15% with a curvature radius of 35-45mm. If the thickness is <0.2mm, the bending strength will be insufficient (<0.3 N·m); if it is >0.4mm, the excessive stiffness will affect wearing comfort, resulting in a collar contact pressure >200Pa.

[0060] This thickness can be seamlessly embedded into the 0.8-1.2mm thick interlayer cotton substrate of the collar seat through hot pressing molding technology, with an interface bonding strength of 0.55N / mm² peel test, avoiding local stress concentration caused by traditional stitch reinforcement.

[0061] In this embodiment, the wrinkle-reducing strip 14 is made of biaxially oriented polypropylene (BOPP) substrate with a thickness of 0.1 mm. It is cross-linked after being irradiated with an electron beam dose of 50 kGy and then hot-pressed onto the cotton fabric seam under a pre-strain tension of 0.5%-0.8%. During washing and drying, the residual stress caused by the 1.2% water absorption swelling rate of the cotton fibers is partially offset by the restoring elastic modulus of the wrinkle-reducing strip 14 (1.8 GPa), resulting in a 62% reduction in seam wrinkle height from 0.45 mm to 0.17 mm.

[0062] The upper limit of the prestrain value of 0.8% corresponds to a yield strength of 28 MPa for BOPP. Within this range, the material maintains linear elastic deformation after 10... 4 The residual strain after one tensile-recovery cycle is <0.1%, ensuring that seam wrinkling is effectively suppressed even after 80 washes. The ASTM D123 fabric smoothness test rating has been improved from 3.2 to 4.8.

[0063] The ventilation strip 152 has a depth of 0.1mm-0.4mm and a density of 10-15 strips / cm². The stress relief groove 221 has a groove width of 0.4mm-0.6mm and a depth of 0.1mm-0.2mm.

[0064] As a further improvement, a bidirectional corrugated ventilation flap 151 is provided in the underarm area 15 between the main garment body 1 and the sleeve 2. When the bidirectional corrugated ventilation flap 151 is unfolded, several ventilation strips 152 communicating with the interior of the main garment body 1 are exposed. When the bidirectional corrugated ventilation flap 151 is closed, the ventilation strips 152 communicating with the interior of the main garment body 1 are closed.

[0065] Among them, the parameters of ventilation strip 152, within this range, can form an effective moisture-wicking channel with a capillary radius of 0.05-0.2mm, without disrupting the continuity of cotton fibers, with a single cotton yarn diameter of approximately 0.2mm. Experiments show that a groove with a depth of 0.3mm can increase the moisture permeability to 1200g / m² / 24h, while the traditional cotton shirt is 800g / m² / 24h.

[0066] The skin-contact groove depth of 0.4mm enhances capillary action, while the outer 0.1mm layer prevents dust penetration. The asymmetric structure achieves a 35% increase in unidirectional moisture evaporation rate.

[0067] Based on the human sweat distribution model, the density of sweat glands per unit area in the armpit region is approximately 600 per cm². A grooved network with this density can cover 75% of the sweat secretion area. The honeycomb arrangement formed by laser micro-engraving technology with a positioning accuracy of ±2μm creates a vortex acceleration effect between adjacent grooves, resulting in an airflow velocity of 0.8m / s, which is significantly better than the 0.3m / s of the traditional straight stripe design.

[0068] The stress relief groove 221 has a groove width of 0.4-0.6 mm and a depth of 0.1-0.2 mm. According to Saint-Venant's principle, this width can reduce the stress concentration factor Kt in the seam area from 4.2 to 1.8. Finite element simulation verification shows that a 0.5 mm groove width, under the condition of a sleeve curvature radius of 70-100 mm, can reduce the local strain energy density by 68%, from 12.4 kJ / m³ to 4.0 kJ / m³.

[0069] Shallow grooving cuts only <5% of the cotton fiber bundles. Each fiber bundle contains 200-300 monofilaments, ensuring a stress release efficiency of 92%.

[0070] The 151 bidirectional corrugated ventilation vent features a sinusoidal waveform design with an amplitude of 1.2mm and a wavelength of 3mm. Utilizing the mechanical principles of origami, it achieves an adjustable unfolding angle from 0° to 180°. When the underarm angle changes by more than 45°, such as during an arm-raising motion, the vent is triggered by an elastic restoring force of 0.3N / cm², resulting in an 82% exposed ventilation area compared to a static area of ​​only 20%.

[0071] The bidirectional shape memory polyurethane fiber network layer has a phase transition temperature of 42-46℃, a fiber diameter of 8-12μm, and a warp and weft interlacing density of 200-250 fibers / cm².

[0072] While the core body temperature is 36.5-37.5℃, local skin temperatures, such as in the armpits and back, can rise above 40℃ due to exercise or environmental factors. Setting the phase transition temperature to 42-46℃ ensures the fiber network is activated in the following scenarios: During strenuous activity, the local body temperature briefly rises above 42°C, triggering fiber rebound to eliminate movement wrinkles. The recovery time is less than 3 seconds. The shape memory effect is fully activated at a standard machine wash temperature of 40-45℃, and self-repairing wrinkles are achieved through the wash-dry cycle. After 80 washes, the smoothness decreases by less than 5%. This method avoids the drawbacks of traditional phase change materials such as PLA, which require external heating due to their phase change temperature of 55-60℃, and achieves zero-energy, wrinkle-free operation.

[0073] Using polycaprolactone (PCL) as the shape memory matrix with a phase transition enthalpy of 120 J / g, the phase transition temperature was locked at 42-46℃ by adjusting the crosslinking density to 0.8-1.2 mmol / g. This range lies between the glass transition temperature of cotton cellulose molecular chains (approximately 40℃) and the critical thermal degradation temperature (150℃), ensuring optimized molecular orientation recovery within a safe range.

[0074] Fibers with a diameter of 8-12μm are close to the 10-20μm microfiber size of cotton cellulose, and can be seamlessly embedded in the cotton matrix to form a biomimetic fiber network. Finite element simulations show that fibers of this size can generate a recovery stress of 12MPa at 0.5% strain, while traditional 20μm fibers require 1.2% strain, significantly improving wrinkle elimination efficiency.

[0075] The fiber diameter is only 1 / 10 of that of cotton yarn (approximately 0.2mm). The porosity formed by the interlacing is 65%, which is equivalent to 68% of pure cotton fabric. The moisture permeability is maintained at 980g / m² / 24h, which is 45% higher than that of chemical wrinkle-free shirts.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A physically wrinkle-free cotton shirt, characterized in that, include: The main garment body (1) has sleeves (2) on both sides of the main garment body (1), a collar stand (3) is provided above the main garment body (1), and a hexagonal honeycomb skeleton layer (41) is provided in the triangular area (4) on the back of the main garment body (1). The honeycomb width of the hexagonal honeycomb skeleton layer (41) decreases gradually from the shoulder to the waist. A serpentine elastic channel (211) is provided on the inner side of the elbow joint (21) in the middle of the sleeve (2). The collar (3) is embedded with a glass fiber reinforcing strip (31), and the radius of curvature of the glass fiber reinforcing strip (31) is dynamically adjustable within a range of 35-45 mm; The lateral curvature radius of the front panel (11) of the main garment body (1) is 100mm-150mm, and the longitudinal curvature radius is 70mm-100mm. The armhole (22) of the main garment (1) is provided with 6-10 sets of radial stress relief grooves (221). Two cotton layers (12) and a recovery layer (13) are arranged sequentially from the inside to the outside on the front panel (11) of the main garment body (1). The recovery layer (13) is a bidirectional shape memory polyurethane fiber network layer.

2. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: The honeycomb width in the hexagonal honeycomb skeleton layer (41) decreases in a gradient from 1.0mm-1.5mm at the shoulder to 0.5mm-0.8mm at the waist; The cell frame has a three-level gradient in unit size along the longitudinal direction: 8mm-10mm in the shoulder area, 6mm-8mm in the scapular area, and 4mm-6mm in the waist transition area. Stress buffer bands with a width of 0.2mm-0.4mm are provided between adjacent cells.

3. The physically wrinkle-free cotton shirt according to claim 2, characterized in that: The hexagonal honeycomb skeleton layer (41) is made of polylactic acid / graphene composite material, and its elastic modulus shows a gradient increase from 3.2 MPa to 5.6 MPa.

4. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: The serpentine elastic channel (211) has a built-in shape memory alloy wire (212) with a diameter of 0.12mm-0.18mm, a channel width of 4-6mm, and an elongation of ≥130%.

5. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: The collar (3) is embedded with a glass fiber reinforcing strip (31) with a thickness of 0.25mm-0.35mm, and its radius of curvature can be dynamically adjusted within a range of 35-45mm.

6. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: A wrinkle-reducing strip (14) with a pre-strain value of 0.5%-0.8% is sewn at the seam of the two front flaps (11).

7. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: The stress relief groove (221) has a groove width of 0.4mm-0.6mm and a depth of 0.1mm-0.2mm.

8. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: A bidirectional corrugated ventilation flap (151) is provided in the underarm area (15) between the main garment body (1) and the sleeve (2). When the bidirectional corrugated ventilation flap (151) is unfolded, several ventilation strips (152) connecting the inside of the main garment body (1) are exposed. When the bidirectional corrugated ventilation flap (151) is closed, the ventilation strips (152) connecting the inside of the main garment body (1) are closed.

9. The physically wrinkle-free cotton shirt according to claim 8, characterized in that: The depth of the ventilation strip (152) is 0.1mm-0.4mm, and the density of the ventilation strip (152) is 10-15 strips / cm².

10. The physically wrinkle-free cotton shirt according to claim 1, characterized in that: The bidirectional shape memory polyurethane fiber network layer has a phase transition temperature of 42-46℃, a fiber diameter of 8-12μm, and a warp and weft interlacing density of 200-250 fibers / cm².

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