Bend-resistant rigid composite hat brim

Abstract

The present application relates to the technical field of hat brim, and discloses a kind of bending-resistant and stiff composite hat brim, including hat band and hat brim structure, the hat brim structure is installed in the side of hat band, the hat brim structure includes outer decorative sun-proof fabric layer, first adhesive layer, bending-resistant fiber reinforced layer, second adhesive layer, core stiff support layer, third adhesive layer, buffer shock-absorbing layer, fourth adhesive layer, inner layer shaping lining, fifth adhesive layer, inner bottom skin-friendly fabric layer, the surface of outer decorative sun-proof fabric layer is connected with hat band, the lower surface of outer decorative sun-proof fabric layer is fixed by first adhesive layer and the upper surface of bending-resistant fiber reinforced layer is bonded.The present application is supported by gradient thickness PC board support layer, directional arrangement fiber reinforced layer and the synergistic effect of gradient air pressure air bag structure, realizes the mechanical properties of front stiff and back soft, both guarantees hat brim front end persistent stiff, sun-shading form stable, and improves rear end flexibility and bending fatigue resistance.

Description

Technical Field

[0001] This invention relates to the field of hat brim technology, specifically to a flexible and stiff composite hat brim. Background Technology

[0002] The brim, also known as the visor or brim, is the protruding, sheet-like structure at the front of a hat. It primarily serves to shield from the sun and rain, and is also decorative. It is typically made of a rigid lining and fabric, and is often curved or flat. It effectively blocks direct sunlight from reaching the eyes, reducing glare and improving visual comfort. Commonly seen in outdoor activities, sports, and everyday wear, it is not only practical but also flattering to the face and enhances the overall style of the hat. Different hat styles vary in brim length, width, and curvature, fulfilling functional needs while also becoming an important element in distinguishing hat styles. Currently, traditional hat brims are mostly made of a single rigid liner and fabric composite, which makes it difficult to balance stiffness and bending resistance. Although the rigid liner can ensure the stiff shape required for sun shading, it has poor flexibility and is prone to breakage and deformation after repeated bending, and cannot restore its original curvature. On the other hand, although the flexible liner is resistant to bending, it lacks stiffness and is prone to collapse at the front end, affecting the sun shading effect. Therefore, we propose a bending-resistant and stiff composite hat brim. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a flexible and sturdy composite brim, solving the problem that traditional brims are mostly made of a single rigid liner and fabric composite, making it difficult to balance sturdiness and flexibility. While rigid liner can ensure the sturdy shape required for sun shading, it has poor flexibility and is prone to breakage and deformation after repeated bending, unable to restore its original curvature. On the other hand, while flexible liner is sturdy, it lacks sturdiness and is prone to collapsing at the front, affecting the sun shading effect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a bend-resistant and stiff composite brim, comprising a headband and a brim structure. The brim structure is installed on one side of the headband. The brim structure includes an outer sun-protective fabric layer, a first adhesive layer, a bend-resistant fiber reinforcement layer, a second adhesive layer, a core stiffening support layer, a third adhesive layer, a cushioning and shock-absorbing layer, a fourth adhesive layer, an inner shaping lining layer, a fifth adhesive layer, and an inner skin-friendly fabric layer. The outer sun-protective fabric layer is connected to the surface of the headband. The lower surface of the outer sun-protective fabric layer is bonded and fixed to the upper surface of the bend-resistant fiber reinforcement layer via the first adhesive layer. The lower surface of the bend-resistant fiber reinforcement layer is bonded and fixed to the upper surface of the core stiffening support layer via the second adhesive layer. The lower surface of the core stiffening support layer is bonded and fixed to the upper surface of the cushioning and shock-absorbing layer via the third adhesive layer. The lower surface of the cushioning and shock-absorbing layer is bonded and fixed to the upper surface of the inner shaping lining layer via the fourth adhesive layer. The lower surface of the inner shaping lining layer is bonded and fixed to the upper surface of the inner skin-friendly fabric layer via the fifth adhesive layer. The structure is constructed using a gradient thickness PC... The synergistic effect of the board support layer, the directional fiber reinforcement layer, and the gradient air pressure airbag structure achieves the mechanical characteristics of being firm in the front and flexible in the back. This ensures that the front of the brim remains firm and the sunshade shape is stable, while also improving the flexibility and resistance to bending fatigue at the rear, making it less prone to deformation or cracking after repeated bending.

[0005] Preferably, the flexural fiber reinforcement layer includes an edge rib area, which divides the interior into a front, middle and rear portion. The front portion is provided with a plurality of densely packed fiber strips arranged at equal intervals. The middle portion has a first cavity and the rear portion has a second cavity. Both the first cavity and the second cavity are provided with airbags, and adjacent airbags are connected by a connecting tube.

[0006] Preferably, the inflation pressure of the airbag in the first cavity is greater than the inflation pressure of the airbag in the second cavity, forming a mechanical gradient structure that is firm in the front and flexible in the back.

[0007] Preferably, the second adhesive layer has an intermittent adhesive coating structure, with unadhesive areas reserved along the arc-shaped segments of the brim to form interlayer micro-hinges, allowing the brim to adaptively bend and maintain its shape along the arc direction. The intermittent adhesive coating of the second adhesive layer forms interlayer micro-hinges, allowing the brim to adaptively bend and maintain its shape along the arc direction, which can adapt to different head shapes and sun shading angle requirements. The gradient density buffer layer and the skin-friendly inner fabric further enhance the fit and comfort of wearing.

[0008] Preferably, the core stiffening support layer is a gradient thickness PC board, with the front end being thicker than the rear end along the brim length direction, achieving segmented mechanical support. The core stiffening support layer uses a gradient thickness PC board, with the front end being thicker to provide the main stiffening support to maintain the sunshade shape; the rear end is thinner, improving flexibility and fit. At the same time, the front part of the bend-resistant fiber reinforcement layer is a high-density dense fiber strip, and the middle and rear airbags adopt a gradient air pressure design, forming a mechanical gradient with the core support layer that is stiff at the front and flexible at the back. This ensures the stiffness of the front sunshade while allowing the rear end to bend adaptively, adapting to different head shapes and wearing angles. The bend-resistant and fatigue-resistant principle: the fibers of the bend-resistant fiber reinforcement layer are oriented along the brim length direction, which can effectively disperse stress concentration during bending and avoid interlayer cracking. The second bonding layer uses intermittent adhesive to form interlayer micro-hinges, allowing the brim to be bent repeatedly along the arc direction without permanent deformation. At the same time, the gradient density foam material of the buffer and shock-absorbing layer further absorbs bending impact, improving the overall fatigue life.

[0009] Preferably, the cushioning and shock-absorbing layer is a gradient density foam material, with a higher density on the side closer to the core support layer and a lower density on the side closer to the inner shaping lining layer. The higher density on the side closer to the core layer provides support, while the lower density on the side closer to the inner layer cushions the rigid feel. Combined with the sweat-absorbing and breathable properties of the inner skin-friendly fabric layer, it significantly improves wearing comfort. The gradient density cushioning layer also plays a role in shock absorption and impact resistance, extending the product's service life.

[0010] Preferably, the fourth adhesive layer has a dot matrix coating structure.

[0011] Preferably, the fibers of the flexural fiber reinforcement layer are oriented along the length of the brim, and the edge rib area and the dense fiber strips together form a grid skeleton to prevent the brim from deforming due to the expansion of the airbag. At the same time, the whole is a pure layered composite structure, which is convenient for industrial production.

[0012] Preferably, the bonding strength of the fifth adhesive layer is lower than that of the first adhesive layer, which facilitates disassembly and recycling after the product is scrapped. The fifth adhesive layer is designed with a lower bonding strength than the first adhesive layer, so that the product can be easily disassembled along the interlayer interface after it is scrapped, realizing the classified recycling and reuse of materials of each functional layer, which is in line with the concept of green manufacturing and sustainable development.

[0013] Preferably, the gaps in the airbag are filled with a functional phase material, which is a phase change material microcapsule or biodegradable microparticle. The functional phase material filling the airbag can achieve local temperature regulation or shape support, further improving the coolness and structural stability when worn in summer. The airbag interconnection structure ensures balanced air pressure and avoids local bulging or uneven stress.

[0014] In summary, the technical effects and advantages of this invention are as follows: 1. In this invention, the mechanical properties of being firm at the front and flexible at the back are achieved through the synergistic effect of the gradient thickness PC board support layer, the directional fiber reinforcement layer and the gradient air pressure airbag structure. This ensures that the front of the brim is firm and the sunshade shape is stable, while improving the flexibility and bending fatigue resistance of the rear end. It is not easy to deform or crack after repeated bending.

[0015] 2. In this invention, the second adhesive layer uses intermittent adhesive application to form interlayer micro-hinges, allowing the brim to bend adaptively along the arc direction and maintain its shape, which can adapt to different head shapes and sun shading angle requirements; the gradient density buffer layer and the skin-friendly inner fabric further improve the fit and comfort of wearing.

[0016] 3. In this invention, the gradient density buffer layer also serves to reduce shock and resist impact, thus extending the product's service life.

[0017] 4. In this invention, the functional phase material filled inside the airbag can achieve local temperature regulation or shape support, further improving the coolness and structural stability when worn in summer. The airbag interconnection structure ensures balanced air pressure and avoids local bulging or uneven stress.

[0018] 5. In this invention, the fifth adhesive layer is designed with a lower adhesive strength than the first adhesive layer, so that the product can be easily disassembled along the interlayer interface after it is scrapped, realizing the classification, recycling and reuse of materials of each functional layer, which is in line with the concept of green manufacturing and sustainable development.

[0019] 6. In this invention, the edge rib area and the dense fiber strip together form a grid skeleton to prevent the brim from deforming due to the expansion of the air bladder. At the same time, the whole is a pure layered composite structure, which is convenient for industrial production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a bend-resistant and stiff composite brim according to the present invention; Figure 2 This is a schematic diagram of the upward-view structure of a bend-resistant and stiff composite brim according to the present invention; Figure 3 This is a schematic diagram of the layered structure of the brim in a bend-resistant and stiff composite brim according to the present invention; Figure 4 This is a schematic diagram of the bend-resistant fiber reinforcement layer in a bend-resistant and stiff composite brim according to the present invention.

[0021] In the diagram: 1. Headband; 2. Brim structure; 21. Outer sun-protective fabric layer; 22. First bonding layer; 23. Bending-resistant fiber reinforcement layer; 231. Edge rib area; 232. Front; 233. Middle; 234. Back; 235. Dense fiber strip; 236. First cavity; 237. Second cavity; 238. Airbag; 239. Connecting tube; 24. Second bonding layer; 25. Core stiff support layer; 26. Third bonding layer; 27. Cushioning and shock-absorbing layer; 28. Fourth bonding layer; 29. ​​Inner shaping lining layer; 210. Fifth bonding layer; 211. Inner skin-friendly fabric layer. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] refer to Figures 1-4 The illustrated type of flexible and stiff composite brim includes a headband 1 and a brim structure 2. The brim structure 2 is installed on one side of the headband 1. The brim structure 2 includes an outer sun-protective fabric layer 21, a first bonding layer 22, a flexible fiber reinforcement layer 23, a second bonding layer 24, a core stiff support layer 25, a third bonding layer 26, a cushioning and shock-absorbing layer 27, a fourth bonding layer 28, an inner shaping lining layer 29, a fifth bonding layer 210, and an inner skin-friendly fabric layer 211.

[0024] Among them, the brim structure 2 is a multi-layered composite structure, which includes, from the outside to the inside: Outer sun-protective fabric layer 21: As the outermost layer of the brim, it is made of high-density woven fabric, which has the functions of UV protection, wear resistance and decoration, and is sewn or bonded to the outer surface of the headband 1.

[0025] First adhesive layer 22: A continuous hot melt adhesive web is used to firmly bond the outer sun protection fabric layer 21 to the bending-resistant fiber reinforcement layer 23, ensuring the interlayer bonding strength and flexibility.

[0026] Bending-resistant fiber reinforcement layer 23: This is the core functional layer, made of oriented polyester fiber nonwoven fabric. The fibers are arranged along the length of the brim to improve longitudinal bending fatigue resistance.

[0027] The second adhesive layer 24 adopts an intermittent adhesive coating structure, with unadhesive areas reserved along the arc-shaped segments of the brim to form interlayer micro-hinges, allowing the brim to bend adaptively along the arc direction and maintain its shape.

[0028] Core stiff support layer 25: It is a graded thickness PC board, with the front end being thicker than the rear end along the length of the brim, to achieve segmented mechanical support that is firm at the front and flexible at the back, ensuring the stiffness of the sunshade and the fit of the wearer.

[0029] The third bonding layer 26 uses a flexible polyurethane adhesive to connect the core rigid support layer 25 and the buffer and shock-absorbing layer 27, adapting to the difference in deformation between layers and avoiding bending and cracking.

[0030] Buffer and shock-absorbing layer 27: It is a gradient density foam material. The density is higher on the side closer to the core stiff support layer 25 to provide support and cushioning; the density is lower on the side closer to the inner shaping liner 29 to improve the skin-friendly feel and impact resistance.

[0031] Fourth adhesive layer 28: adopts a dot matrix adhesive coating structure.

[0032] Inner shaping lining 29: Made of fine denier nylon needle-punched nonwoven fabric, it helps maintain the curvature of the brim and prevents the inner skin-friendly fabric layer 211 from wrinkling and deforming.

[0033] Fifth adhesive layer 210: Uses environmentally friendly adhesive, with a bonding strength lower than the first adhesive layer 22, which facilitates disassembly and recycling after the product is scrapped, and meets environmental protection requirements.

[0034] Inner sole skin-friendly fabric layer 211: As the innermost layer of the brim, it uses breathable knitted cotton fabric to improve the softness and sweat absorption of the wearer, thus enhancing wearing comfort.

[0035] The flexural fiber reinforcement layer 23 includes an edge rib area 231, which divides the interior into a front part 232, a middle part 233, and a rear part 234. The front part 232 is provided with a number of dense fiber strips 235 arranged at equal intervals. The middle part 233 has a first cavity 236, and the rear part 234 has a second cavity 237. Airbags 238 are provided in both the first cavity 236 and the second cavity 237. Adjacent airbags 238 are connected by a connecting tube 239.

[0036] The specific structure of the flexural fiber reinforcement layer 23 is as follows: The flexural fiber reinforcement layer 23 includes an edge rib region 231, which divides its interior into a front portion 232, a middle portion 233, and a rear portion 234. Front section 232: It is provided with several dense fiber strips 235 arranged at equal intervals. The fiber density is higher than that of the middle section 233 and the rear section 234, providing stiff support at the front end and ensuring the stability of the shading shape.

[0037] The middle section 233 has a first cavity 236, which contains multiple airbags 238. Adjacent airbags 238 are connected by a connecting pipe 239 to achieve air pressure balance.

[0038] Rear section 234: A second cavity 237 is provided, and an airbag 238 is also provided inside. Adjacent airbags 238 are connected by a connecting tube 239.

[0039] The inflation pressure of the air bladder 238 in the first cavity 236 is greater than that of the air bladder 238 in the second cavity 237, forming a mechanical gradient that is firm in the front and soft in the back, further enhancing the adaptive fit of the brim.

[0040] The gaps in the airbag 238 are filled with functional phase material, which is a phase change material microcapsule or biodegradable microparticle. This material can achieve temperature regulation or shape support, while also helping to buffer bending stress.

[0041] Preferably, the inflation pressure of the airbag 238 in the first cavity 236 is greater than the inflation pressure of the airbag 238 in the second cavity 237, forming a mechanical gradient structure that is firm in the front and flexible in the back.

[0042] Preferably, the second adhesive layer 24 has an intermittent adhesive coating structure, with unadhesive areas reserved along the arc-shaped segments of the brim to form interlayer micro-hinges, allowing the brim to adaptively bend and maintain its shape along the arc direction. The intermittent adhesive coating of the second adhesive layer 24 forms interlayer micro-hinges, allowing the brim to adaptively bend and maintain its shape along the arc direction, which can adapt to different head shapes and sun shading angle requirements. The gradient density buffer layer and the skin-friendly inner fabric further improve the fit and comfort of wearing.

[0043] Preferably, the core stiffening support layer 25 is a gradient thickness PC board, with the front end being thicker than the rear end along the brim length direction to achieve segmented mechanical support. The core stiffening support layer 25 uses a gradient thickness PC board, with the front end being thicker to provide the main stiffening support to maintain the sunshade shape; the rear end is thinner to improve flexibility and fit. At the same time, the front 232 of the bend-resistant fiber reinforcement layer 23 is a high-density dense fiber strip 235, and the middle 233 and rear 234 airbags 238 adopt a gradient air pressure design, forming a front-firm and rear-flexible structure with the core support layer. The mechanical gradient ensures both the stiffness of the front sunshade and the adaptive bending capability of the back end, accommodating different head shapes and wearing angles. The bending-resistant and fatigue-resistant fiber reinforcement layer 23 has fibers oriented along the length of the brim, which can effectively disperse stress concentration during bending and prevent interlayer cracking. The second bonding layer 24 uses intermittent adhesive to form interlayer micro-hinges, allowing the brim to be bent repeatedly along the arc direction without permanent deformation. At the same time, the gradient density foam material of the cushioning and shock-absorbing layer 27 further absorbs bending impact and improves the overall fatigue life.

[0044] Preferably, the cushioning and shock-absorbing layer 27 is a gradient density foam material, with a higher density on the side closer to the core support layer 25 and a lower density on the side closer to the inner shaping liner 29. The higher density of the cushioning and shock-absorbing layer 27 on the side closer to the core layer provides support, while the lower density on the side closer to the inner layer buffers the rigid feel. Combined with the sweat-absorbing and breathable properties of the inner skin-friendly fabric layer 211, it significantly improves wearing comfort. The gradient density cushioning layer also plays a role in shock absorption and impact resistance, extending the product's service life.

[0045] Preferably, the fourth adhesive layer 28 has a dot matrix adhesive coating structure.

[0046] Preferably, the fibers of the flexural fiber reinforcement layer 23 are oriented along the length of the brim, and the edge rib area 231 and the dense fiber strips 235 together form a grid skeleton to prevent the brim from deforming due to the expansion of the airbag 238. At the same time, the whole is a pure layered composite structure, which is convenient for industrial production.

[0047] Preferably, the bonding strength of the fifth adhesive layer 210 is lower than that of the first adhesive layer 22, which facilitates the disassembly and recycling of the layers after the product is scrapped. The fifth adhesive layer 210 is designed with a lower bonding strength than the first adhesive layer 22, so that the product can be easily disassembled along the interlayer interface after it is scrapped, realizing the classified recycling and reuse of materials of each functional layer, which is in line with the concept of green manufacturing and sustainable development.

[0048] Preferably, the gaps in the airbag 238 are filled with a functional phase material, which is a phase change material microcapsule or biodegradable microparticle. The functional phase material filling the airbag 238 can achieve local temperature regulation or shape support, further improving the coolness and structural stability when worn in summer. The interconnected structure of the airbag 238 ensures balanced air pressure and avoids local bulging or uneven stress.

[0049] The working principle of this invention is as follows: The core stiffening support layer 25 uses a gradient thickness PC board, with a thicker front end to provide the main stiffening support to maintain the sunshade shape; the rear end is thinner to improve flexibility and fit. At the same time, the front part 232 of the bend-resistant fiber reinforcement layer 23 is a high-density dense fiber strip 235, while the middle part 233 and the rear part 234 airbags 238 adopt a gradient air pressure design, forming a mechanical gradient with the core support layer that is stiff at the front and flexible at the back. This ensures the stiffness of the sunshade at the front while allowing the rear end to bend adaptively to fit different head shapes and wearing angles. The bend-resistant and fatigue-resistant principle is that the fibers of the bend-resistant fiber reinforcement layer 23 are oriented along the length of the brim, which can effectively disperse stress concentration during bending and avoid interlayer cracking. The second bonding layer 24 uses intermittent adhesive to form interlayer micro-hinges, allowing the brim to be bent repeatedly along the arc direction without permanent deformation. At the same time, the gradient density foam material of the cushioning and shock-absorbing layer 27 further absorbs the bending impact and improves the overall fatigue life. The cushioning and shock-absorbing layer 27 has a higher density near the core layer to provide support, and a lower density near the inner layer to cushion the rigid feel. Combined with the sweat-wicking and breathable properties of the inner skin-friendly fabric layer 211, it significantly improves wearing comfort. The functional phase material filling the gaps or walls of the airbag 238 can, on the one hand, help buffer bending stress and maintain the shape of the airbag 238, and on the other hand, the phase change material can regulate the local temperature of the brim by absorbing and releasing heat, thus improving the coolness of wearing in summer. The fifth adhesive layer 210 adopts an adhesive strength design that is lower than that of the first adhesive layer 22, so that the product can be easily disassembled along the interlayer interface after it is scrapped, so as to realize the classified recycling of each material and meet environmental protection requirements.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bend-resistant and stiff composite brim, comprising a headband (1) and a brim structure (2), wherein the brim structure (2) is installed on one side of the headband (1), characterized in that: The brim structure (2) includes an outer sun-protective fabric layer (21), a first adhesive layer (22), a bend-resistant fiber reinforcement layer (23), a second adhesive layer (24), a core stiffening support layer (25), a third adhesive layer (26), a cushioning and shock-absorbing layer (27), a fourth adhesive layer (28), an inner shaping lining layer (29), a fifth adhesive layer (210), and an inner skin-friendly fabric layer (211). The outer sun-protective fabric layer (21) is connected to the surface of the headband (1), and the lower surface of the outer sun-protective fabric layer (21) is connected to the bend-resistant fiber reinforcement layer (23) through the first adhesive layer (22). The lower surface of the flexural fiber reinforcement layer (23) is bonded and fixed to the upper surface of the core stiffening support layer (25) through the second adhesive layer (24). The lower surface of the core stiffening support layer (25) is bonded and fixed to the upper surface of the cushioning and shock-absorbing layer (27) through the third adhesive layer (26). The lower surface of the cushioning and shock-absorbing layer (27) is bonded and fixed to the upper surface of the inner shaping liner (29) through the fourth adhesive layer (28). The lower surface of the inner shaping liner (29) is bonded and fixed to the upper surface of the inner bottom skin-friendly fabric layer (211) through the fifth adhesive layer (210).

2. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The flexural fiber reinforcement layer (23) includes an edge rib area (231), which divides the interior into a front part (232), a middle part (233) and a rear part (234). The front part (232) is provided with a number of dense fiber strips (235) arranged at equal intervals. The middle part (233) has a first cavity (236), and the rear part (234) has a second cavity (237). Airbags (238) are provided in both the first cavity (236) and the second cavity (237). Adjacent airbags (238) are connected by a connecting tube (239).

3. The bend-resistant and stiff composite brim according to claim 2, characterized in that: The inflation pressure of the airbag (238) in the first cavity (236) is greater than the inflation pressure of the airbag (238) in the second cavity (237), forming a mechanical gradient structure that is firm in the front and soft in the back.

4. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The second adhesive layer (24) is an intermittent adhesive coating structure, with unadhesive areas reserved along the arc-shaped segments of the brim to form interlayer micro-hinges, allowing the brim to bend and shape adaptively along the arc direction.

5. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The core stiffening support layer (25) is a gradient thickness PC board, with the front end thickness being greater than the rear end thickness along the brim length direction, to achieve segmented mechanical support.

6. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The buffer and shock-absorbing layer (27) is a gradient density foam material, with a higher density on the side closer to the core stiff support layer (25) and a lower density on the side closer to the inner shaping liner (29).

7. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The fourth adhesive layer (28) has a dot matrix coating structure.

8. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The fibers of the flexural fiber reinforcement layer (23) are oriented along the length of the brim.

9. The bend-resistant and stiff composite brim according to claim 1, characterized in that: The bonding strength of the fifth adhesive layer (210) is lower than that of the first adhesive layer (22), which makes it easier to disassemble and recycle the layers after the product is scrapped.

10. A bend-resistant, stiff composite brim according to claim 2, characterized in that: The gaps in the airbag (238) are filled with functional phase material, which is a phase change material microcapsule or biodegradable microparticle.

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