Shape memory polymer supporting strip and shooting garment comprising same

Abstract

The invention relates to a shape memory polymer supporting strip and a shooting garment comprising the same, and belongs to the field of textile garments. The shape memory polymer supporting strip is made of a shape memory polymer and has a first shape and a second shape; the shooting garment with the shape memory polymer supporting strip comprises a garment body and the shape memory polymer supporting strip installed on the garment body. The shape of the supporting strip can be adjusted through the shape memory characteristic. The supporting strip is heated to a specific temperature and shaped into a required shape, and is fixed after being cooled, so that the supporting strip can provide better support in shooting postures such as a standing posture, a kneeling posture or a prone posture. The shape memory polymer supporting strips can be repeatedly deformed and recovered to the initial state, and high mechanical strength and hardness are kept, so that the stability of athletes is improved, the precision loss caused by body shaking is reduced, and the competitive performance is improved.

Description

Technical Field

[0001] The invention relates to a support bar and shooting clothing containing the support bar, in particular to a shape memory polymer support bar and shooting clothing containing the support bar, belonging to the field of textile clothing. Background Art

[0002] Shooting competitions typically involve standing, kneeling, and prone positions. To maximize stability and minimize accuracy loss due to body movement in these various positions, athletes often wear supportive shooting suits. Existing shooting suits are typically made of rigid and supportive fabrics, with support strips sewn into the fabric joints to provide additional vertical support (i.e., at the body's height), helping to maintain torso stability while standing or kneeling.

[0003] In existing technology, support strips are primarily made of rigid polymer materials such as polyamide, ABS polyester, or thick cotton rope. While these materials provide good vertical support, the overall garment inevitably bends during shooting as the athlete's posture changes (for example, from standing to kneeling, prone, and bending the elbows and shoulders). This bending of the support strip can lead to the following problems:

[0004] The large rebound force makes it difficult to maintain complex bends. Ordinary hard polymer materials or cotton ropes tend to generate strong rebound forces after being bent, tending to return to their original vertical shape. To maintain the support bar's conformity in a bent position, athletes must continuously apply force to counteract the rebound force. This, in turn, causes body vibrations during the subtle but prolonged process of maintaining stable aim, affecting accuracy and performance.

[0005] Plastic deformation reduces support capacity. To adapt traditional support bars to the complex postures of athletes during use, they can be plastically bent by applying a sufficiently large external force. However, plastic deformation can damage the material's internal structure or degrade its performance, reducing the bar's hardness and strength, thereby weakening the shooting suit's overall support function and making it difficult to meet the demands of prolonged, intensive use.

[0006] Difficulty adjusting to different positions. Athletes frequently switch between shooting positions during training and competition, and the support bars are often difficult to repeatedly bend and adjust to different shapes without degrading the material's performance. Without the ability to accommodate multiple deformations and fixation requirements, achieving a more precise fit and support is difficult.

[0007] In summary, existing support bar materials and structures have limitations in meeting the multi-position support requirements of shooting suits. While maintaining rigidity and strength, it's necessary to provide more flexible deformation and fixation characteristics to accommodate the diverse support requirements of shooting sports. Ensuring stable support in multiple positions without compromising effectiveness due to material rebound or plastic fatigue has become a pressing technical challenge in this field. Summary of the Invention

[0008] This invention aims to overcome the shortcomings of existing shooting suits, such as the difficulty of using support strip materials to simultaneously provide high-strength support, maintain complex bending shapes after deformation, and experience unstable performance after repeated use. In its first aspect, the invention provides support strips that are mounted on the main body of the shooting suit. In its second aspect, the invention provides shooting competition suits incorporating shape-memory support strips. This shooting suit provides customized support for key areas such as the shoulders, elbows, and torso, tailored to the human skeleton, in various postures, including standing, kneeling, and prone positions. This reduces the interference caused by rebound forces and maintains excellent mechanical properties and shape-memory characteristics even after repeated deformation.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A shape memory polymer support strip, the support strip being made of a shape memory polymer and having a first shape and a second shape; when the support strip is heated above a transition temperature of the shape memory polymer, the support strip can be deformed from the first shape to a second shape for fitting a specific posture of a shooting athlete, and fixed to the second shape after cooling below the transition temperature of the shape memory polymer; when the support strip is heated again to above the shape memory transition temperature, the support strip can be restored from the second shape to the first shape.

[0011] In some embodiments, the shape memory polymer of the support strip is polyurethane having a thermal shape memory effect or a composite thereof. The polyurethane composite may be a composite of shape memory polyurethane and polyamide.

[0012] In some embodiments, the support bar is circular or sheet-shaped; when a polyurethane composite is used, the support bar has a parallel structure or a skin-core structure.

[0013] In some embodiments, the support bars are in a parallel structure, with the polyurethane being on the left or right side of the parallel structure of the support bars; the support bars are in a skin-core structure, with the polyurethane being in the skin or core layer of the support bars.

[0014] In some embodiments, the first shape of the support bar is a substantially straight bar, and the second shape is a bent shape pre-shaped according to the human skeleton posture.

[0015] In some embodiments, the bending angle of the second shape of the support bar corresponds to the joint bending degree of the shooting athlete in a standing position, a kneeling position or a lying position, and the support bar can maintain a fixed fitting shape after cooling.

[0016] In some embodiments, the second shape of the support bar has a bending angle range of 0° to 90° at the shoulder and a bending angle range of 40° to 140° at the elbow.

[0017] In some embodiments, the second shape of the support bar has a bending angle range of 0° to 30° at the waist and a bending angle range of 0° to 110° at the knee.

[0018] In some embodiments, the support bar has preset bending curvature radii R1 and R2 for the elbow and knee positions respectively, with R1 being 10-110 mm and R2 being 10-100 mm to adapt to the angle and comfort requirements of human joint movements.

[0019] A shooting garment containing a shape memory polymer support strip comprises a garment body and a shape memory polymer support strip mounted on the garment body, wherein the support strip is made of a shape memory polymer and has a first shape and a second shape; when the support strip is heated above its shape memory transition temperature, the support strip can be deformed from the first shape to a second shape for fitting a specific posture of a shooter, and fixed to the second shape after cooling below the shape memory transition temperature; when the support strip is heated again to above the shape memory transition temperature, the support strip can be restored from the second shape to the first shape.

[0020] In some embodiments, the main body of the shooting clothing is made of a fabric with a certain rigidity, and sewing channels or fixing parts are reserved at the joints of the fabric for embedding shape memory polymer support strips.

[0021] In some embodiments, the garment body is provided with a plurality of embedded channels at the back, shoulders, elbows, waist, and / or trouser legs for securing the support bars. Based on the conventional structure of shooting suits, a plurality of strip-shaped support areas are provided at key locations such as the back, shoulders, waist, elbows, and trouser legs to meet the stability requirements in different postures.

[0022] In some embodiments, the support strips can be fixed to the fabric joints of the shooting suit by embedding, sewing or using detachable fasteners to ensure that when the shooting suit is worn as a whole, effective support is provided to joints or load-bearing areas such as shoulders, waist and elbows.

[0023] In some embodiments, the length, width, and thickness of the support strips can be designed and tailored according to the needs of different parts of the body to ensure precise support and comfort for different parts of the body.

[0024] Shape memory polymer support bars are made of shape memory polymer (SMP) or composite materials containing shape memory components. When heated above its transition temperature (T_trans), the material can be molded into a specified curved shape and fixed after cooling.

[0025] When heated again above the transition temperature, the support strips return to their original shape, achieving multiple reversible deformations. At normal operating temperatures (room temperature or the temperature of the athlete's wear environment), the support strips exhibit high stiffness and strength, meeting support requirements. During the heating and deformation process, the modulus decreases, facilitating shaping.

[0026] Beneficial effects of the present invention:

[0027] (1) Strong adaptability and good support effect

[0028] Through the reversible deformation characteristics of the shape memory polymer support strip, the shape of the support strip can be adjusted and fixed at any time according to the athlete's body structure and movement requirements in different shooting postures, significantly improving the fit and support effect of the clothing.

[0029] (2) Reduce rebound interference and improve shooting stability

[0030] Traditional polymer support bars generate significant rebound force after bending, affecting the athlete's stability. This invention utilizes the shape-fixing properties of shape-memory polymer materials at room temperature to effectively reduce this rebound force, allowing athletes to focus more on aiming and shooting, thereby improving accuracy.

[0031] (3) Good reusability and high durability

[0032] Shape-memory polymer support strips maintain excellent mechanical properties after multiple heating and cooling cycles, eliminating the need for material fatigue and damage caused by frequent shaping or bending, making them ideal for shooters' high-frequency training and competition use. Skin-core structured shape-memory polyurethane support strips, with the shape-memory polyurethane in the skin or core, impart shape memory properties to the entire strip, while the addition of other polymers enhances support and wear resistance.

[0033] (4) Easy to maintain and cost-controllable

[0034] The support strips are removable and easily replaceable, improving product maintainability while effectively controlling the overall cost of use. Compared to traditional hard materials that undergo one-time plastic deformation, shape memory polymer support strips are reusable, offering greater economic benefits and practical value.

[0035] The above-mentioned technical solution not only effectively supports various shooting postures, but also avoids the performance degradation caused by frequent bending and deformation of traditional support bars, significantly improving the functionality and durability of shooting suits. This technical solution provides a better option for shooters to maintain precise aiming and stability during training and competition. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a diagram showing the process of the shape memory polyurethane support strip obtained in Example 1 of the present invention returning to its original shape after being heated;

[0037] Figure 2 This is a sample result diagram obtained by sewing the shape memory polyurethane support strip obtained in Example 1 of the present invention into the canvas;

[0038] Figure 3 This is a diagram showing the result of fixing a specific angle using the shape memory property of the canvas sewn with shape memory polyurethane support strips obtained in Example 2 of the present invention;

[0039] Figure 4 This is a compression test curve diagram of the sample obtained in Example 1 of the present invention after being bent at a fixed angle for different times;

[0040] Figure 5 This is a compression test curve diagram of the sample obtained in Example 2 of the present invention after being bent at a fixed angle for different times;

[0041] Figure 6 This is a compression test curve diagram of the sample obtained in Example 3 of the present invention after being bent at a fixed angle for different times;

[0042] Figure 7 This is a compression test curve diagram of the sample obtained in Example 4 of the present invention after being bent at a fixed angle for different times;

[0043] Figure 8 This is a compression test curve diagram of the sample obtained in Comparative Example 1 of the present invention after being bent at a fixed angle for different times;

[0044] Figure 9 This is a compression test curve diagram of the sample obtained in Comparative Example 2 of the present invention after being bent at a fixed angle for different times;

[0045] Figure 10 This is a comparison chart of the maximum supporting force of all samples of the present invention after 1 and 50 bending cycles. DETAILED DESCRIPTION

[0046] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the application for which protection is claimed, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0047] Unless otherwise defined, the terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein should be interpreted as having the same meaning as that in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such herein.

[0048] Shape memory polymer: refers to a class of polymer materials that can recover from a temporary shape to its original shape under the action of a specific external stimulus (usually temperature, but also light, magnetic field, electric field and other forms). Figure 1 The thermo-induced shape memory polymer involved in the present invention mainly relies on temperature changes to achieve deformation and memory processes such as from soft state to hard state, from bent shape to straight shape, etc.

[0049] Shape memory transition temperature: This refers to the temperature range at which a shape memory polymer undergoes a glass transition or softening transition when subjected to external heating. Above this temperature, the material is in a low modulus or plastic state, allowing it to be stretched, bent, and shaped. Below this temperature, it exhibits a high modulus and retains its shape after bending.

[0050] Elastic modulus: A measure of a material's ability to resist deformation during elastic deformation, often also referred to as "Young's modulus." The higher the elastic modulus, the less elastic deformation the material will experience under the same stress. In the present invention, when the shape memory polymer support strip has a high elastic modulus at room temperature, it provides effective support. When heated to the transition temperature range, the modulus decreases, facilitating shape adjustment.

[0051] Plastic deformation: When a material is subjected to forces exceeding its elastic deformation range, it undergoes permanent deformation, meaning it cannot return to its original shape after unloading. In this invention, traditional polymer support bars are susceptible to plastic deformation if subjected to continuous bending forces during use, resulting in a decrease in hardness and strength, making it difficult to maintain stable support.

[0052] Resilience: The reaction force generated by a material's tendency to return to its original state after deformation due to external forces such as bending or compression. For ordinary rigid polymers, even small bends produce significant rebound forces. This invention utilizes the shape-memory polymer's property of being fixed at room temperature to effectively reduce the interference caused by rebound.

[0053] Shooting suits: Specialized clothing used for competitive air rifle shooting (including standing, kneeling, and prone positions). They typically require a certain degree of rigidity, stability, and comfort to help athletes reduce body movement. The shooting suits of this invention incorporate shape-memory polymer support strips at the fabric joints to accommodate various shooting postures and provide stable support for athletes.

[0054] Support strips: These are thin, long strips or sheets of material sewn into or embedded in a shooting suit to enhance the suit's support in various directions. Traditional support strips are typically made of rigid polymers or thick cotton ropes, while this invention utilizes shape-memory polymers to achieve both high-strength support and reversible deformation.

[0055] Skeletal posture or joint range of motion: This refers to the range of angles and displacements that bones and joints can achieve when standing, kneeling, lying down, raising arms, bending elbows, and other movements. By bending and shaping the shape memory polymer support strips, the present invention can better conform to these postures and provide corresponding support.

[0056] Mechanical properties: These include tensile strength, flexural strength, hardness, elastic modulus, and elongation at break, measuring a material's deformation and load-bearing capacity under external forces. In this invention, the shape memory polymer material must maintain good mechanical properties after repeated heating and cooling cycles to ensure the durability of the support bar.

[0057] Multi-cycle deformation refers to the ability of a material to maintain a high degree of shape recovery and strength during repeated cycles of "heating → deformation → cooling → setting → heating again → recovery or further deformation." The shape memory polymer support strips used in this invention can deform repeatedly through multiple thermal cycles while maintaining excellent support.

[0058] The support bar of the present invention is made of a shape-memory polymer and has a first shape and a second shape. When heated above its shape-memory transition temperature, the support bar can transform from the first shape to a second shape designed to fit the shooter's specific posture. After cooling below the shape-memory transition temperature, the support bar is fixed in the second shape. When heated again above the shape-memory transition temperature, the support bar can return from the second shape to the first shape. The shape-memory polymer of the support bar is a polyurethane material or a composite material with a thermal shape-memory effect. The bending angle of the support bar in the second shape corresponds to the joint flexion of the shooter in standing, kneeling, or lying positions. The support bar has a circular or sheet-like skin-core structure, with the shape-memory polymer in the skin or core layer. The first shape of the support bar is a substantially straight bar, while the second shape is a curved shape pre-shaped to the human skeletal posture. The bending angle of the support bar ranges from 0° to 90° at the shoulder and from 40° to 140° at the elbow. The support bars have a bending angle range of 0° to 30° at the waist and 0° to 110° at the knees. The support bars are arranged in a parallel structure, with the shape memory polymer located on either the left or right side of the parallel structure. The support bars have preset bending radii R1 and R2 at the elbow and knee, respectively. R1 ranges from 10 to 110 mm, and R2 ranges from 10 to 100 mm, to accommodate the angles and comfort requirements of human joint movements.

[0059] The shooting suit of the present invention comprises a suit body and support bars mounted on the suit body. The back, shoulders, elbows, waist and trouser legs of the suit body are respectively provided with a plurality of embedded channels for fixing the support bars.

[0060] Combination of support bar and clothing:

[0061] The support strips can be fixed to the seam joints of the shooting suit by embedding, sewing or using detachable fasteners to ensure that when the shooting suit is worn as a whole, it provides effective support to joints or load-bearing areas such as shoulders, waist and elbows.

[0062] The length, width and thickness of the support strips can be designed and cut according to the needs of different parts of the body to ensure precise support and comfort for different parts of the body.

[0063] Application and adjustment methods:

[0064] When used for the first time or when a customized bending shape is required, the support bar is heated to above T_trans and shaped to match the athlete's skeletal posture or specific shooting action. After cooling, the support bar maintains this fixed shape.

[0065] After a period of use, if you need to restore it to its original shape or make a secondary adjustment, you only need to heat it again to above T_trans to achieve the reset or reshaping of the support bar.

[0066] After multiple thermal cycles, the support bar still has good strength and shape memory properties, and is not prone to permanent deformation or strength attenuation due to excessive bending.

[0067] Example 1: Preparation of a hybrid support strip using shape memory polyurethane as raw material

[0068] (1) Shape memory polyurethane chips and polyamide chips are put into a twin-screw extruder at a spinning temperature of 240°C. A skin-core structure spinneret is used, and the shape memory polyurethane is in the outer layer. The shape memory polyurethane support strip with a skin-core structure is melt-extruded. The overall diameter of the support strip is 1 mm, of which the diameter of the core layer polyamide is 0.6 mm and the wall thickness of the outer layer shape memory polyurethane is 0.2 mm. The support strip is wound onto a drum.

[0069] (2) Sew the prepared skin-core structure shape memory polyurethane support strip into a 4*4cm canvas, as shown in Figure 2 As shown, fold the fabric 1 cm and sew it close to the support strip to obtain a sample.

[0070] (3) Simulate the shape of the sample to fit the bending of a human elbow and bend the sample to 90°.

[0071] Example 2: Preparation of support strips using shape memory polyurethane as raw material

[0072] (1) Shape memory polyurethane chips and polyamide chips are put into a twin-screw extruder at a spinning temperature of 240°C. A parallel structure spinneret is used, with the shape memory polyurethane on the left. The shape memory polyurethane is melt-extruded to form a shape memory polyurethane support strip with a parallel structure. The support strip is cylindrical with an overall diameter of 1 mm. The shape memory polyurethane and polyamide are symmetrical semicircles. After the support strip is made, it is wound onto a drum.

[0073] (2) The prepared parallel structure shape memory polyurethane support strips were sewn into a 4*4 cm canvas, the fabric was folded 1 cm and then sewn close to the support strips to obtain a sample.

[0074] (3) Simulate the shape of the sample to fit the bending of a human knee and bend the sample to a curvature radius of 80 mm.

[0075] Example 3: Preparation of support strips using shape memory polyurethane as raw material

[0076] (1) Shape memory polyurethane chips were put into a twin-screw extruder at a spinning temperature of 190°C, melt-extruded to form shape memory polyurethane support strips with a diameter of 1 mm, and wound onto a drum.

[0077] (2) The prepared shape memory polyurethane support strip was sewn into a 4*4 cm canvas, the fabric was folded 1 cm and then sewn close to the support strip to obtain a sample.

[0078] (3) Simulate the shape of the sample to fit the bending of a human elbow and bend the sample to 60°.

[0079] Example 4: Preparation of support strips using shape memory polyurethane as raw material

[0080] (1) Shape memory polyurethane chips were put into a twin-screw extruder at a spinning temperature of 190°C, melt-extruded to form shape memory polyurethane support strips with a diameter of 1 mm, and wound onto a drum.

[0081] (2) The prepared shape memory polyurethane support strip was sewn into a 4*4 cm canvas, the fabric was folded 1 cm and then sewn close to the support strip to obtain a sample.

[0082] (3) Simulate the shape of the sample to fit the bending of a human knee and bend the sample to 100°.

[0083] Comparative Example 1: Preparation of support strips using polyester as raw material

[0084] (1) The polyester chips were put into a twin-screw extruder at a spinning temperature of 280°C, melt-extruded to form polyester support strips with a diameter of 1 mm, and wound onto a drum.

[0085] (2) Sew the prepared polyester support strip into a 4*4 cm canvas, fold the fabric 1 cm and sew it close to the support strip to obtain a sample.

[0086] (3) Simulate the shape of the sample to fit the bending of a human elbow and bend the sample to 90°.

[0087] Comparative Example 2: Preparation of support strips made of ABS plastic

[0088] (1) Put ABS plastic slices into a twin-screw extruder at a spinning temperature of 180°C, melt-extrude to form ABS plastic support strips with a diameter of 1 mm, and wind them onto a drum.

[0089] (2) Sew the prepared ABS plastic support strip into a 4*4 cm canvas, fold the fabric 1 cm and sew it close to the support strip to obtain a sample.

[0090] (3) Simulate the shape of the sample to fit the bending of a human knee and bend the sample to a curvature radius of 140 mm.

[0091] The samples obtained in the above examples were subjected to compression analysis tests. The tests used compression tests to compare the support effects of different fibers, with the aim of simulating the support effects of materials applied to clothing.

[0092] Test method: Figure 3 As shown, the bent sample is placed in the middle of the compression disc with its opening facing upwards. The lower disc is fixed and the upper disc moves downward at a speed of 2mm / min to compress the sample until the sample is flattened. This completes one experiment. The sample is heated and bent again for 50 cycles. The test results are shown in the figure. Figure 4-9 shown.

[0093] like Figure 4 Figure 2 shows the pressure test results for the support strip obtained in Example 1. The shape-memory polyurethane support strip produced in Example 1 generated a pressure of 1.65 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample remained intact, generating a pressure of 1.5 MPa.

[0094] like Figure 5 Figure 2 shows the pressure test results for the support strip obtained in Example 2. The shape-memory polyurethane support strip produced in Example 2 generated a pressure of 1.58 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample remained intact, generating a pressure of 1.01 MPa.

[0095] like Figure 6 Figure 2 shows the pressure test results for the support strip obtained in Example 3. The shape-memory polyurethane support strip produced in Example 3 generated a pressure of 1.3 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample remained intact, generating a pressure of 0.99 MPa.

[0096] like Figure 7 Figure 2 shows the pressure test results for the support strip obtained in Example 4. The shape-memory polyurethane support strip produced in Example 4 generated a pressure of 1.02 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample remained intact, generating a pressure of 0.93 MPa.

[0097] like Figure 8The figure below shows the pressure test results of the support strip obtained in Comparative Example 1. The polyester support strip produced in Comparative Example 1 generated a pressure of 1.77 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample broke, and the support performance significantly decreased, generating a pressure of 0.42 MPa.

[0098] like Figure 9 The figure below shows the pressure test results of the support strip obtained in Comparative Example 2. The ABS plastic support strip produced in Comparative Example 2 generated a pressure of 1.74 MPa when the sample was initially folded in half. As the sample was heated and folded repeatedly for a cyclic test, the compression pressure gradually decreased. After 50 folds, the sample broke, and the support performance significantly decreased, generating a pressure of 0.61 MPa.

[0099] like Figure 10 The figure below compares the maximum pressures obtained for all samples tested. Examples 1-4 utilize support strips made of shape-memory polyurethane, effectively utilizing their shape memory properties. When heated, they bend and fix into specific shapes, better conforming to the curved surfaces of the elbow and knee, providing enhanced support. Furthermore, the samples recover their original shape upon heating, remaining stable after repeated bending and maintaining consistent support strength, ensuring excellent elbow and knee support for athletes. The addition of shape-memory polymers enhances the durability of the support strips.

[0100] While traditional polymer support strips like polyester and ABS can be bent into curved shapes that conform to the human elbow and knee, these polymers lack shape memory properties, leading to irreversible plastic deformation after bending. Excessive bending can cause the strips to break. Therefore, while the support strips made in Comparative Examples 1 and 2 initially exhibited greater support than shape-memory polyurethane strips, they fractured after 50 bends, significantly reducing their support strength. This resulted in a loss of support, which in turn affected the athletes' performance during competition.

[0101] The shooting apparel of the present invention comprises support strips made of fabric and a shape-memory polymer, wherein the support strips are capable of adjusting their shape through shape memory properties. By heating the support strips to a specific temperature, shaping them into the desired shape, and then cooling them to secure them, the strips provide improved support in shooting positions such as standing, kneeling, and prone. The shape-memory polymer support strips can repeatedly deform and return to their original state while maintaining high mechanical strength and hardness, thereby improving athletes' stability, reducing precision loss caused by body movement, and enhancing competitive performance.

[0102] Thus far, the embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0103] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A shape memory polymer support strip, characterized in that: The support bar is made of a shape memory polymer and has a first shape and a second shape; when the support bar is heated to above the transition temperature of the shape memory polymer, the support bar is deformed from the first shape to a second shape for fitting the specific posture of the shooting athlete, and is fixed to the second shape after cooling to below the transition temperature of the shape memory polymer; when the support bar is heated again to above the shape memory transition temperature, the support bar recovers from the second shape to the first shape.

2. The shape memory polymer support strip according to claim 1, characterized in that: The shape memory polymer of the support strip is polyurethane or a composite thereof having a thermal shape memory effect, and the polyurethane composite is a composite of shape memory polyurethane and polyamide.

3. The shape memory polymer support strip according to claim 2, wherein: The support strips are in the shape of a circle or a sheet; when a polyurethane composite is used, the support strips have a parallel structure or a skin-core structure.

4. The shape memory polymer support strip according to claim 1, wherein: The first shape of the support bar is a substantially straight bar, and the second shape is a bent shape pre-shaped according to the human skeleton posture.

5. The shape memory polymer support strip according to claim 4, characterized in that: The bending angle of the second shape of the support strip corresponds to the joint bending degree of the shooting athlete in a standing position, a kneeling position or a lying position, and the support strip can maintain a fixed fitting shape after cooling.

6. The shape memory polymer support strip according to claim 5, characterized in that: The second shape of the support bar has a bending angle range of 0° to 90° at the shoulder and a bending angle range of 40° to 140° at the elbow; the second shape of the support bar has a bending angle range of 0° to 30° at the waist and a bending angle range of 0° to 110° at the knee.

7. The shape memory polymer support strip according to claim 6, characterized in that: The support bar has preset bending curvature radii R1 and R2 for the elbow and knee positions respectively, R1 is 10-110 mm, and R2 is 10-100 mm.

8. A shooting garment containing a shape memory polymer support strip, characterized in that: The invention comprises a clothing body and a shape memory polymer support strip as claimed in any one of claims 1 to 7 installed on the clothing body.

9. The shooting garment containing shape memory polymer support strips according to claim 8, characterized in that: The clothing body is made of fabric with a certain rigidity, and a sewing channel or a fixing position is reserved at the joint of the fabric.

10. The shooting garment containing shape memory polymer support strips according to claim 9, characterized in that: A plurality of embedded channels are respectively provided at the back, shoulders, elbows, waist and / or trouser legs of the clothing body; and the support strips are fixed to the fabric joints of the shooting suit by embedding, sewing or using detachable fasteners.

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