Novel light high-performance bulletproof helmet
By designing an outer PE layer, an inner PE layer, and a middle PE layer, combined with the hot-pressing connection of the nanofiber membrane, the balance between lightweight and high protective performance of bulletproof helmets is solved, reducing back deformation after bullet impact and improving the rigidity and anti-delamination ability of bulletproof helmets.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-03
Smart Images
Figure CN224080849U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of bulletproof helmets, specifically relating to a new type of lightweight, high-performance bulletproof helmet. Background Technology
[0002] Lightweight design and high protective performance are the main development directions for bulletproof helmets. PE fiber, due to its high strength and low density, has been widely used in bulletproof helmet manufacturing, exhibiting high fragmentation resistance and achieving a high V50 value, meaning it has a good stopping effect on high-speed shrapnel. Bulletproof helmets made with PE fiber have the advantages of being lightweight and having a high V50 value. However, the high V50 value of existing bulletproof helmets means that their structure delaminates significantly upon impact. This makes existing bulletproof helmets prone to collapse after a bullet impact, resulting in a large bullet hole on the back, which can easily cause secondary head injuries to the wearer. This significant back deformation can not only cause internal helmet collapse but also increase the risk of head injury after impact, limiting the application of bulletproof helmets in high-standard protection requirements. In other words, existing bulletproof helmets struggle to achieve a good balance between lightweight design and high protective performance.
[0003] Meanwhile, the development of bulletproof helmets not only requires maintaining a high V50 value to ensure shrapnel protection performance, but also requires a certain degree of rigidity to prevent significant deformation or collapse of the helmet when hit by bullets, and to control the height of bullet marks within a safe range, thereby effectively reducing the impact force on the head.
[0004] Therefore, in view of the shortcomings of existing bulletproof helmets in balancing lightweight and high protective performance, this utility model discloses a new type of lightweight high-performance bulletproof helmet. Utility Model Content
[0005] This utility model discloses a novel lightweight high-performance bulletproof helmet, which solves the problem of large bullet impact indentation in existing bulletproof helmets formed by laminating and molding fiber UD fabric. At the same time, it can balance the requirements of lightweight helmet and high protection performance, reducing the weight of the helmet while ensuring its protective performance.
[0006] This utility model is achieved through the following technical solution:
[0007] A novel lightweight high-performance bulletproof helmet includes an outer PE layer and an inner PE layer, wherein the outer PE layer and the inner PE layer are woven membrane layers; an intermediate PE layer is disposed between the outer PE layer and the inner PE layer, wherein the intermediate PE layer includes several resin layers arranged sequentially, and the thickness of the several resin layers varies; a nanofiber membrane is hot-pressed between the outer PE layer, the inner PE layer and the intermediate PE layer.
[0008] The outer, inner, and middle PE layers are all made of ultra-high molecular weight polyethylene (UHMWPE), thus reducing the helmet's surface density and meeting the requirement for lightweight bulletproof helmets. Simultaneously, the outer and inner PE layers, formed by a woven membrane strip, provide stable rigid support for the inner and outer sides of the bulletproof helmet, as well as the middle PE layer located between them. This rigid structure ensures the helmet's stiffness upon impact with a projectile, solving the problem of large dents in existing bulletproof helmets and guaranteeing the helmet's high protective performance. Furthermore, nanofiber membranes are hot-pressed between the outer and middle PE layers, and between the middle and inner PE layers, replacing the adhesives and resins used to fill the PE layers in traditional bulletproof helmets, further reducing the helmet's weight. The hot-pressed nanofiber membrane improves the fracture toughness of the PE layers, enhances the anti-delamination ability between adjacent PE layers, and improves the compressive strength and fatigue performance of the PE layers after impact. Moreover, the nanofiber membrane, along with the outer and inner PE layers, synergistically enhances rigidity, reducing back deformation after impact.
[0009] To better realize this utility model, the intermediate PE layer further includes a second PE layer, a third PE layer, and a fourth PE layer arranged sequentially, and a nanofiber membrane is provided between the outer PE layer, the second PE layer, the third PE layer, the fourth PE layer, and the inner PE layer.
[0010] To better realize this utility model, the second PE layer, the third PE layer, and the fourth PE layer all include a polyethylene UD cloth layer. The thickness of the polyethylene UD cloth layer of the third PE layer is greater than the thickness of the polyethylene UD cloth layer of the second PE layer, and the thickness of the polyethylene UD cloth layer of the second PE layer is less than or equal to the thickness of the polyethylene UD cloth layer of the fourth PE layer.
[0011] To better realize this utility model, the thickness of the second PE layer accounts for 10-15% of the total thickness of the bulletproof helmet, the thickness of the third PE layer accounts for 10-20% of the total thickness of the bulletproof helmet, and the thickness of the fourth PE layer accounts for 10-20% of the total thickness of the bulletproof helmet.
[0012] To better realize this utility model, the outer PE layer and the inner PE layer both include PE film strips, and the PE film strips are unidirectionally orthogonally laid or similarly plain-weave orthogonally laid to form the outer PE layer and the inner PE layer.
[0013] To better realize this utility model, the width of the PE film strip is less than or equal to 150mm, and the thickness of the PE film strip is less than or equal to 0.1mm.
[0014] To better realize this utility model, the outer PE layer accounts for 35-40% of the total thickness of the bulletproof helmet, and the inner PE layer accounts for 5-10% of the total thickness of the bulletproof helmet.
[0015] To better realize this utility model, the thickness of the nanofiber membrane is further 8-24 μm.
[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0017] (1) The outer PE layer, middle PE layer and inner PE layer involved in this utility model are all made of ultra-high molecular weight polyethylene material, which reduces the surface density of the helmet and achieves the goal of making the bulletproof helmet lightweight.
[0018] (2) This utility model provides stable rigid support for the inner and outer surfaces of the bulletproof helmet by laying and weaving the PE film strip with the greatest rigidity to form an outer PE layer and an inner PE layer, ensuring the rigidity of the helmet shell after the projectile impacts it. The rigid structure formed by the outer PE layer can completely shatter the projectile into multiple fragments, reducing its impact on the interior. At the same time, due to the large tensile modulus and small elongation at break of the PE film strip, the tensile deformation is smaller when impacted, which solves the problem of the large dent depth of the PE helmet when impacted.
[0019] (3) This utility model adds a resin-free nanofiber membrane between each PE layer, which is compatible with epoxy resin and polyester resin systems. The nanofiber membrane has almost no mass and does not affect the weight of the helmet. By hot-pressing the nanofiber membrane, the fracture toughness of the PE layer can be improved, the anti-delamination ability between each PE layer can be enhanced, the compressive strength after impact can be improved, and the fatigue performance of the composite material can be improved. The nanofiber membrane works synergistically with the outer PE layer and the inner PE layer to reduce the amount of back deformation after the ballistic impact.
[0020] (4) This utility model provides an intermediate PE layer consisting of several resin layers between the outer PE layer and the inner PE layer, and the resin content of the resin layer gradually decreases, so that the intermediate PE layer works synergistically with the outer PE layer and the inner PE layer to further dissipate and reduce the energy of the bullet step by step, maximize the performance of the fiber and resin, enhance the bulletproof capability of the helmet, and reduce the deformation of the back after the bullet hit. Attached Figure Description
[0021] Figure 1 This is a structural diagram of a bulletproof helmet;
[0022] Figure 2 This is a schematic diagram of unidirectional orthogonal layup of PE film strips;
[0023] Figure 3 This is a schematic diagram of a PE film strip with a plain orthogonal layup.
[0024] Wherein: 1-outer PE layer; 2-second PE layer; 3-third PE layer; 4-fourth PE layer; 5-inner PE layer; 6-nanofiber membrane. Detailed Implementation
[0025] Example 1:
[0026] This embodiment presents a novel lightweight, high-performance bulletproof helmet, such as... Figure 1 As shown, it includes an outer PE layer 1 and an inner PE layer 5, wherein the outer PE layer 1 and the inner PE layer 5 are woven film strips; an intermediate PE layer is provided between the outer PE layer 1 and the inner PE layer 5, wherein the intermediate PE layer includes several resin layers arranged sequentially, and the thickness of the several resin layers varies; a nanofiber membrane 6 is hot-pressed to connect the outer PE layer 1, the inner PE layer 5 and the intermediate PE layer.
[0027] The outer PE layer 1 and the inner PE layer 5 are woven film strips, forming a dense, rigid support structure by unidirectional orthogonal or near-plain weave PE film strips. This ensures the rigidity of the inner and outer sides of the bulletproof helmet and provides stable rigid support for the intermediate PE layer between the inner and outer sides. The PE film strip has an areal density of 105 g / m², a resin content of 12%, a tensile strength of 2.5~3.0 GPa, a tensile modulus of up to 150 GPa, and an elongation at break of 2.5%~3.0%, resulting in less tensile deformation under impact. Therefore, the outer PE layer 1 and inner PE layer 5, formed by woven PE film strips, have excellent rigidity and help reduce the depth of dents after impact.
[0028] The intermediate PE layer comprises several resin layers arranged sequentially, with varying thicknesses and resin content. A nanofiber membrane 6 is sequentially heat-pressed between the outer PE layer 1, the intermediate PE layer, and the inner PE layer 5. The thermoplastic nanofiber membrane 6 is made of PA66 and is integrated onto a silicone peelable paper using an electrospinning process to form the nanofiber membrane 6, which is compatible with epoxy and polyester resin systems. The nanofiber membrane 6 is virtually weightless and does not affect the helmet's weight. The nanofiber membrane 6 improves the fracture toughness (anti-delamination ability) and compressive strength after impact between the PE layers. The nanofiber membrane 6 works synergistically with the rigid layers of the outer PE layer 1 and the inner PE layer 5 to reduce the amount of back convex deformation after impact.
[0029] Example 2:
[0030] This embodiment discloses a novel lightweight high-performance bulletproof helmet, which is further optimized based on Embodiment 1. The intermediate PE layer includes a second PE layer 2, a third PE layer 3, and a fourth PE layer 4 arranged sequentially. A nanofiber membrane 6 is provided between the outer PE layer 1, the second PE layer 2, the third PE layer 3, the fourth PE layer 4, and the inner PE layer 5.
[0031] Furthermore, the second PE layer 2, the third PE layer 3, and the fourth PE layer 4 all include a polyethylene UD fabric layer. The thickness of the polyethylene UD fabric layer of the third PE layer 3 is greater than the thickness of the polyethylene UD fabric layer of the second PE layer 2, and the thickness of the polyethylene UD fabric layer of the second PE layer 2 is less than or equal to the thickness of the polyethylene UD fabric layer of the fourth PE layer 4.
[0032] Furthermore, the thickness of the second PE layer 2 accounts for 10-15% of the total thickness of the bulletproof helmet, the thickness of the third PE layer 3 accounts for 10-20% of the total thickness of the bulletproof helmet, the thickness of the fourth PE layer 4 accounts for 10-20% of the total thickness of the bulletproof helmet; the thickness of the outer PE layer 1 accounts for 35-40% of the total thickness of the bulletproof helmet, and the thickness of the inner PE layer 5 accounts for 5-10% of the total thickness of the bulletproof helmet.
[0033] Preferably, the thicknesses of the outer PE layer 1, the second PE layer 2, the third PE layer 3, the fourth PE layer 4, and the inner PE layer 5 account for 40%, 10%, 20%, 20%, and 10% of the total thickness of the helmet, respectively.
[0034] The second PE layer 2, the third PE layer 3, and the fourth PE layer 4 all include a 2UD polyethylene fabric layer with a high molecular weight. The second PE layer 2 is composed of several layers of 2UD polyethylene fabric, with a single 2UD fabric having a surface density of 105 g / m² and a resin content of 25%. The third PE layer 3 is composed of several layers of 2UD polyethylene fabric, with a single 2UD fabric having a surface density of 105 g / m² and a resin content of 20%. The fourth PE layer 4 is composed of several layers of 2UD polyethylene fabric, with a single 2UD fabric having a surface density of 105 g / m² and a resin content of 15%.
[0035] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.
[0036] Example 3:
[0037] This embodiment discloses a novel lightweight high-performance bulletproof helmet, which is further optimized based on the above embodiment 1 or 2. The outer PE layer 1 and the inner PE layer 5 both include PE film strips, and the PE film strips are unidirectionally orthogonally laid or similarly plain-weave orthogonally laid to form the outer PE layer 1 and the inner PE layer 5.
[0038] like Figure 2 As shown, the outer PE layer 1 is formed by unidirectional orthogonal layup of PE film tape. The PE film tape material is prepared from highly oriented ultra-high molecular weight polyethylene strip as the base material. An adhesive is coated on the surface of the PE film tape, and then the outer PE layer 1 is formed by orthogonal layup at 0° / 90° and hot pressing.
[0039] like Figure 3As shown, the inner PE layer 5 is formed by plain-weave PE film tape. The PE film tape material is prepared from ultra-high molecular weight polyethylene strips as the base material, without the use of adhesives, and is woven through a plain-weave pattern. Unlike traditional fiber weaving, the ultra-high molecular weight polyethylene strip material has a certain width, which greatly reduces the "knot" effect, thereby improving the retention rate of the mechanical properties of the PE film tape.
[0040] Furthermore, the width of the PE film strip is less than or equal to 150 mm, and the thickness of the PE film strip is less than or equal to 0.1 mm.
[0041] The other parts of this embodiment are the same as those in Embodiment 1 or 2 above, so they will not be described again.
[0042] Example 4:
[0043] This embodiment discloses a novel lightweight, high-performance bulletproof helmet, which is further optimized based on any one of embodiments 1-3 above. The thickness of the nanofiber membrane 6 is 8-24 μm, and the areal density is 1.5-4.5 g / ㎡. By adding the nanofiber membrane 6 between each PE layer, the fracture toughness between the PE layers is improved, the anti-delamination ability and compressive strength after impact are enhanced, the stress transfer between PE layers with different stiffnesses is made uniform, and the bulletproof performance is improved.
[0044] Preferably, the thickness of the nanofiber membrane 6 is 8 μm.
[0045] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.
[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A novel lightweight, high-performance bulletproof helmet, characterized in that, It includes an outer PE layer (1) and an inner PE layer (5), wherein the outer PE layer (1) and the inner PE layer (5) are woven film strips; an intermediate PE layer is provided between the outer PE layer (1) and the inner PE layer (5), wherein the intermediate PE layer includes several resin layers arranged sequentially, and the thickness of the several resin layers varies; a nanofiber membrane (6) is hot-pressed between the outer PE layer (1), the inner PE layer (5) and the intermediate PE layer.
2. The novel lightweight high-performance bulletproof helmet according to claim 1, characterized in that, The intermediate PE layer includes a second PE layer (2), a third PE layer (3), and a fourth PE layer (4) arranged sequentially. A nanofiber membrane (6) is arranged between the outer PE layer (1), the second PE layer (2), the third PE layer (3), the fourth PE layer (4), and the inner PE layer (5).
3. A novel lightweight high-performance bulletproof helmet according to claim 2, characterized in that, The second PE layer (2), the third PE layer (3), and the fourth PE layer (4) all include a polyethylene UD fabric layer. The thickness of the polyethylene UD fabric layer of the third PE layer (3) is greater than the thickness of the polyethylene UD fabric layer of the second PE layer (2), and the thickness of the polyethylene UD fabric layer of the second PE layer (2) is less than or equal to the thickness of the polyethylene UD fabric layer of the fourth PE layer (4).
4. A novel lightweight high-performance bulletproof helmet according to claim 3, characterized in that, The thickness of the second PE layer (2) accounts for 10-15% of the total thickness of the bulletproof helmet, the thickness of the third PE layer (3) accounts for 10-20% of the total thickness of the bulletproof helmet, and the thickness of the fourth PE layer (4) accounts for 10-20% of the total thickness of the bulletproof helmet.
5. A novel lightweight high-performance bulletproof helmet according to any one of claims 1-4, characterized in that, The outer PE layer (1) and the inner PE layer (5) both include PE film strips, which are formed by unidirectional orthogonal stacking or semi-plain orthogonal stacking of the PE film strips.
6. A novel lightweight high-performance bulletproof helmet according to claim 5, characterized in that, The width of the PE film strip is less than or equal to 150 mm, and the thickness of the PE film strip is less than or equal to 0.1 mm.
7. A novel lightweight high-performance bulletproof helmet according to claim 6, characterized in that, The outer PE layer (1) accounts for 35-40% of the total thickness of the bulletproof helmet, and the inner PE layer (5) accounts for 5-10% of the total thickness of the bulletproof helmet.
8. A novel lightweight high-performance bulletproof helmet according to any one of claims 1-4, characterized in that, The thickness of the nanofiber membrane (6) is 8-24 μm.