Body armor made from a composite elastomer

Abstract

The present application relates to a kind of armours made of composite elastomer, which includes nail body, composite elastomer formed on nail body and formed elastic protection, composite elastomer includes lattice point array structure elastomer and elastic resin layer, and elastic resin layer is at least formed in the internal pore of lattice point array structure elastomer and is combined between lattice point array structure elastomer.The present application infiltrates elastic resin into the internal pore of lattice point array structure elastomer and makes them closely combined to form composite elastomer for the elastic protection of armour, not only satisfy the characteristics of light weight, small volume, but also greatly enhance the compression resistance of composite elastomer, at the same time, also will not affect the flexibility after user wears, in addition, lattice point array structure can further optimize overall modeling, enhance user body feeling.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of daily necessities, and particularly relates to an arm guard made of a composite elastomer. BACKGROUND

[0002] In many occasions requiring buffering and supporting, such as the protection scene of Taekwondo sports, an elastomer material with high strength, high elasticity (anti-compression performance), high impact resistance and light weight is required.

[0003] At present, the elastomer formed by 3D printing from thermoplastic powder as raw material has been applied to various occasions due to the advantages of simple forming process, environmental protection, high raw material utilization rate, recyclability and high precision.

[0004] However, in actual use, due to factors such as melt shrinkage, poor combination between powder particles, and many voids, the mechanical properties of the elastomer are affected. If the anti-compression performance of the elastomer needs to be enhanced, the main means is to increase the thickness of the elastomer. In this way, in the relative motion occasion, the flexibility of the user will be greatly limited, resulting in poor body feeling. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide an improved arm guard made of a composite elastomer.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] An arm guard made of a composite elastomer, comprising an arm body, a composite elastomer formed on the arm body and forming an elastic protection, the composite elastomer comprising a lattice point array structure elastomer and an elastic resin layer, the elastic resin layer being formed in at least the internal pores of the lattice point array structure elastomer and combined with the lattice point array structure elastomer.

[0008] Preferably, the elastic resin layer is also formed on the outer surface of the lattice point array structure elastomer.

[0009] Preferably, the lattice point array structure elastomer is a thermoplastic elastomer.

[0010] According to one specific embodiment and preferred aspect of the application, the hardness of the elastic resin constituting the elastic resin layer is above 50A Shore hardness and below 40D Shore hardness, the viscosity at 25℃ is less than 12000 cP, the tensile strength is above 5 MPa, and the elongation at break is above 120%.

[0011] In some embodiments of the present application, the resin constituting the thermoplastic elastomer is one or a combination of two selected from thermoplastic polyurethane resin and thermoplastic polyethylene resin.

[0012] In some embodiments of the present application, the elastic resin constituting the elastic resin layer is a combination of one or more selected from the group consisting of polyurethane resin, acrylic resin, and silicone resin.

[0013] The present inventors have found that, by bringing the crystal lattice structure elastomer into sufficient contact with a treatment liquid containing an elastic resin or raw materials for forming an elastic resin, a resin curing agent, and then heating and curing, an elastic resin layer is formed in the internal pores of the crystal lattice structure elastomer and on the outer surface of the crystal lattice structure elastomer, the elastic resin is cured, bonded, and compounded with the crystal lattice structure elastomer, filling the internal pores of the crystal lattice structure elastomer, and a composite elastomer with excellent mechanical properties can be obtained. The composite elastomer has higher compression resistance under the same weight, and the material has lower weight under the same compression resistance. In addition, the elastic resin layer on the outer surface of the crystal lattice structure elastomer can reduce the surface roughness of the material, making the surface of the composite elastomer smooth.

[0014] Preferably, the mass of the elastic resin layer is 10% to 60% of the mass of the crystal lattice structure elastomer. Specifically, 20% to 30% is sufficient, which optimizes the weight reduction while ensuring sufficient elastic buffering capacity.

[0015] Preferably, the density of the composite elastomer is 0.7-1.1 g / cm3, and the pressure required to compress to 50% deformation is greater than 200 N. Therefore, the composite elastomer of the present application can achieve lightness while having excellent compression resistance.

[0016] The porosity of the crystal lattice structure elastomer is 5% to 35%.

[0017] The crystal lattice structure elastomer is prepared by 3D printing. By adjusting the 3D printing temperature and laser power and other parameters, the sintering density and porosity of the crystal lattice structure elastomer can be controlled, and thus the depth and mass of the elastic resin penetration can be controlled. The lower the temperature and laser power, the higher the porosity of the printed crystal lattice structure elastomer, the higher the content of the elastic resin in the composite elastomer, and the better the compression resistance of the composite elastomer.

[0018] In some specific embodiments, the parameters used are as follows: temperature 80-140℃, laser power 30-100W, scanning speed 4000-15000mm / s, and scanning pitch 0.1-0.3mm.

[0019] According to the present application, the lattice cell structure constituting the crystal lattice structure elastomer is not particularly limited. The lattice cell structure can be a common cube, star, octagon, hexagon, rhombus, tetrahedron, etc.

[0020] In some embodiments, the lattice cell structure of the lattice structure elastomer is a rhombus.

[0021] In some embodiments of the present application, the body includes a front chest piece and a back piece, and the composite elastomer is arranged on the front chest and / or the back.

[0022] Preferably, the composite elastomer is in multiple pieces and is formed on the front chest and / or the back in a split manner. With the split design, not only is the overall appearance beautiful, but also the force bearing capacity of different parts can be effectively arranged according to the needs, and at the same time, the space required for elastic deformation is provided, which has strong practicability.

[0023] Specifically, the front chest piece is two and is arranged symmetrically left and right, and the composite elastomer on each front chest piece at least forms elastic protection for the chest area, the rib area and the abdominal area corresponding to the front chest piece.

[0024] The composite elastomer on the back at least forms elastic protection for the cervical spine area, the thoracic spine area and the lumbar spine area corresponding to the back.

[0025] In some embodiments, the composite elastomer is also arranged on the side waist and / or the shoulder and neck formed by the connection of the front chest piece and the back piece. In this way, the protection formed is relatively all-round, and the best protection effect is achieved.

[0026] The composite elastomer is formed by coating treatment of the lattice structure elastomer with a treatment liquid containing an elastic resin or raw material thereof and a curing agent.

[0027] The method for coating treatment is spraying, dipping or electroplating, and the treatment liquid is allowed to penetrate into the internal pores of the lattice structure elastomer during coating treatment.

[0028] In some embodiments, the coating treatment time is 5-20 min, and the heating treatment time is 3-12 h.

[0029] Further, the mass concentration of the elastic resin in the treatment liquid is 30-60%, and the mass concentration of the curing agent is 1%-10%. In some embodiments, the mass concentration of the elastic resin in the treatment liquid is 40-55%, and the mass concentration of the curing agent is 2%-5%.

[0030] In some embodiments, the heating and curing are carried out at a temperature of 80-100℃, and the coating treatment and heating and curing are carried out once or repeatedly 1-3 times after the first time.

[0031] Due to the implementation of the above technical solutions, the present application has the following advantages compared with the prior art:

[0032] The present application penetrates the elastic resin into the internal pores of the lattice point array structure elastomer and tightly combines the two to form a composite elastomer for the elastic protection of the armor, not only satisfying the characteristics of light weight and small volume, but also greatly enhancing the compression resistance of the composite elastomer, and at the same time, the flexibility of the user after wearing is not affected, in addition, the lattice point array structure can further optimize the overall modeling and enhance the user's sense of experience. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the armor of the present application;

[0034] Figure 2 It is a front view schematic diagram of the armor of the present application;

[0035] Figure 3 It is a rear view schematic diagram of the armor of the present application

[0036] Figure 4 It is a left view schematic diagram of the armor of the present application;

[0037] Wherein: 1, armor body; 10, front chest piece; 11, back piece; 12, side waist part; 13, shoulder and neck part; 2, composite elastomer. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0040] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0043] Example 1

[0044] like Figure 1 As shown, the armor involved in this embodiment includes an armor body 1 and a composite elastomer 2 formed on the armor body 1 to form elastic protection.

[0045] Specifically, body A 1 includes a front chest piece 10 and a back piece 11 that are connected from the shoulder and waist, and the two front chest pieces 10 and the back piece 11 are connected to form a collar and cuffs.

[0046] In this example, body 1 is made of breathable fabric, and composite elastomer 2 is sewn together with bound edges.

[0047] In combination Figure 2 and Figure 3 As shown in the figure, the composite elastomers 2 are respectively located on the front chest piece 10, the back piece 11, and the connecting part of the front chest piece 10 and the back piece 11.

[0048] Specifically, the left and right front chest pieces 10 are symmetrically arranged.

[0049] Three composite elastomers 2 are formed on the front chest piece 10, wherein the three composite elastomers 2 correspond to the chest area, the rib area, and the abdominal area of the front chest piece 10 respectively, and the three composite elastomers 2 are arranged in sequence from top to bottom.

[0050] Three composite elastomers 2 are also formed on the back piece 11, wherein the three composite elastomers 2 correspond to the cervical spine area, the thoracic spine area, and the lumbar spine area of the back piece 11 respectively, and the three composite elastomers 2 are arranged in sequence from top to bottom.

[0051] Specifically, the composite elastomer 2 corresponding to the thoracic spine area of the back piece 11 extends from the thoracic spine to both sides, and the composite elastomers 2 of the lumbar spine area and the thoracic spine area have the same extension mode, but the extension length of the composite elastomer 2 corresponding to the lumbar spine area is less than that of the composite elastomer 2 corresponding to the thoracic spine area (the reason is that the best elastic protection for the rib is needed).

[0052] In combination Figure 4 As shown in the figure, the connecting part (formed by the relative connection of the front chest piece 10 and the back piece 11) is the side waist part 12 and the shoulder and neck part 13 respectively, and the composite elastomers 2 are arranged on the side waist part 12 and the shoulder and neck part 13 respectively. In this way, the full range of the armor can be implemented to form elastic protection.

[0053] Meanwhile, in this example, the composite elastomer 2 includes a lattice point array structure elastomer and an elastic resin layer, and taking any one of the composite elastomers 2 on the armor body 1 as an example, the forming process thereof includes the following steps:

[0054] 1) Using thermoplastic polyurethane TPU as raw material, a lattice point array structure elastomer is printed by powder sintering 3D, the lattice cell structure thereof is hexagonal, and the process parameters are main temperature 100-120℃, laser power 50W, scanning speed 4000-10000mm / s, and scanning interval 0.2mm.

[0055] 2) 94 parts by mass of a commercially available polyurethane resin solution with a mass concentration of 45%, 6 parts by mass of an isocyanate curing agent, are uniformly mixed and dispersed by a high-speed stirrer to obtain an impregnation treatment solution, wherein the hardness of the polyurethane resin is 55A, the viscosity at 25℃ is 5000cP, the tensile strength is 6MPa, and the elongation at break is 220%.

[0056] 3) The printed lattice structure elastomer was immersed in the impregnation treatment solution prepared in step 2) for 10 min, and then taken out and dried, and then placed in a vacuum oven at 80°C for curing for 3h to obtain a composite material sample.

[0057] The sintering density and porosity of the lattice structure elastomer obtained at different scanning rates, and the weight of the lattice structure elastomer before and after treatment with polyurethane resin, and the pressure at 50% compression deformation are shown in Table 1 below:

[0058] Table 1

[0059]

[0060] From Table 1 above, it can be seen that by controlling the process parameters of 3D printing, the sintering density and porosity of the lattice structure elastomer can be adjusted. The greater the porosity, the more the content of polyurethane resin in the composite elastomer, and the more the compression resistance of the composite elastomer is improved.

[0061] Example 2

[0062] The armor of this example has the same structure as Example 1, except that the forming process of the composite elastomer 2 is different.

[0063] Specifically, the forming process of the composite elastomer 2 includes the following steps:

[0064] 1) A thermoplastic polyurethane (TPU) was used as a raw material, and a lattice structure elastomer was 3D printed by powder sintering forming, with a hexagonal lattice cell structure, process parameters of main temperature 100-120°C, laser power 55W, scanning rate 4000-10000mm / s, and scanning interval 0.2mm;

[0065] 2) A commercially available acrylic resin solution with a mass concentration of about 55% was mixed and dispersed uniformly by a high-speed stirrer to obtain an impregnation treatment solution, wherein the acrylic resin has a hardness of 68A, a viscosity of 6000cP at 25°C, a tensile strength of 12MPa, and an elongation at break of 200%;

[0066] 3) The printed TPU lattice structure elastomer was immersed in the impregnation treatment solution for 10 min, and then taken out and dried, and then placed in a vacuum oven at 80°C for curing for 5h to obtain a composite elastomer sample;

[0067] 4) After solidification, the sample is again placed in the immersion treatment liquid, soaked for 10 min, spun dry, solidified, and repeated once again. That is, three layers of elastic resin layers are formed on the surface of the lattice array structure elastomer in the composite elastomer 2 formed, and at the same time, the weight of the composite elastomer 2 is increased from 21.53 g before treatment to 31.62 g, and the pressure at 50% material compression deformation is increased from 230.2 N before treatment to 584.1 N. The density of the prepared composite elastomer is 0.993 g / cm3.

[0068] Therefore, the present application has the following advantages:

[0069] 1. The present application coats the lattice array structure elastomer with an elastic resin, so that the elastic resin penetrates into the internal pores of the lattice array structure elastomer and is tightly combined with the lattice array structure elastomer. Unexpectedly, without affecting the advantageous properties of the lattice array structure elastomer, the compression resistance of the material is significantly improved, while the volume of the material remains unchanged and the weight only increases slightly. Compared with the lattice array structure elastomer without the elastic resin coating, the volume of the composite elastomer of the present application is significantly smaller and the weight is significantly lighter when achieving the same compression resistance; when the weight is the same, the compression resistance of the composite elastomer of the present application is significantly higher.

[0070] 2. The preparation process of the composite elastomer of the present application uses 3D printing to prepare the lattice array structure elastomer and uses coating treatment and solidification process. On the one hand, by adjusting the 3D printing temperature and laser power and other parameters, the sintering density and porosity of the lattice array structure elastomer can be controlled, and then the penetration depth and quality of the elastic resin can be controlled, and finally the improvement degree of the compression resistance of the composite elastomer can be controlled, so that composite elastomers with various properties can be prepared flexibly to meet the individual needs in various application scenarios. On the other hand, by using the coating treatment and solidification process, the combination between the lattice array structure elastomer and the elastic resin coating is more sufficient and tight, which helps to improve the strength and service life of the composite elastomer.

[0071] 3. Different composite elastomers with different elastic properties are selected according to the needs of the position where the armor bears the force, and finally the composite elastomers are formed in all directions of front, back, up, down, left and right to protect important positions of the human body. Not only does it meet the characteristics of light weight and small volume, but also significantly enhances the compression resistance of the composite elastomer, and at the same time, it also does not affect the flexibility of the user after wearing. In addition, the lattice array structure can further optimize the overall modeling and enhance the user's sense of touch.

[0072] The endpoints of the ranges and any values disclosed herein are not limited to the precise values recited as exactly that endpoint point. The endpoints of the ranges and any values are understood to be approximate values. For ranges having an upper and lower limit, the range can be understood to include each integer within the defined range. The upper and lower limits of the range can independently be included in the range, or independently excluded from the range. The range can also be understood to include single values within the range, which can be the upper or lower limit of the range. For ranges having an upper and lower limit, the range can be understood to include each integer within the defined range. The upper and lower limits of the range can independently be included in the range, or independently excluded from the range. The range can also be understood to include single values within the range, which can be the upper or lower limit of the range.

Claims

1. A glove made of a composite elastomer comprising a glove body, characterized by: The armoured glove further comprises a composite elastomer formed on the glove body and forming elastic protection, the composite elastomer comprising a lattice point array structure elastomer and an elastic resin layer, the elastic resin layer being formed in at least the internal pores of the lattice point array structure elastomer and being combined with the lattice point array structure elastomer; the elastic resin layer is also formed on the outer surface of the lattice point array structure elastomer. The composite elastomer requires a pressure greater than 200 N when compressed to a deformation of 50%; the mass of the elastic resin layer is 10% to 60% of the mass of the lattice point array structure elastomer; the porosity of the lattice point array structure elastomer is 5% to 35%; the lattice cell structure of the lattice point array structure elastomer is one or more of a cube, a star, an octagon, a hexagon, a rhombus, and a tetrahedron; the composite elastomer is formed by coating treatment of the lattice point array structure elastomer using a treatment liquid containing an elastic resin or raw material thereof and a curing agent; the mass concentration of the elastic resin in the treatment liquid is 30% to 60%, and the mass concentration of the curing agent is 1% to 10%; the heating and curing is performed at a temperature of 80 to 100°C, the coating treatment and the heating and curing are performed once, or after the first time, the coating treatment and the heating and curing are repeated 1 to 3 times.

2. The armor made of a composite elastomer according to claim 1, characterized in that: The lattice point array structure elastomer is a thermoplastic elastomer.

3. The armor made from a composite elastomer according to claim 1, characterized in that: The hardness of the elastic resin constituting the elastic resin layer is greater than 50A Shore hardness and less than 40D Shore hardness, the viscosity at 25°C is less than 12000 cP, the tensile strength is greater than 5 MPa, and the elongation at break is greater than 120%.

4. The armor made from a composite elastomer according to claim 1, characterized in that: The lattice point array structure elastomer is prepared by 3D printing.

5. The armor made of a composite elastomer according to any one of claims 1 to 4, characterized in that: The glove body comprises a front chest piece and a back piece, and the composite elastomer is arranged on the front chest and / or the back.

6. The armor made from a composite elastomer according to claim 5, characterized in that: The composite elastomer is in multiple pieces and is formed in a split manner on the front chest and / or the back.

7. The armor made from a composite elastomer according to claim 5, characterized in that: The front chest piece has two pieces and is arranged symmetrically left and right, and the composite elastomer on each of the front chest pieces at least forms elastic protection for the chest region, the rib region, and the abdominal region corresponding to the front chest piece.

8. The armor made from a composite elastomer according to claim 5, characterized in that: The composite elastomer on the back at least forms elastic protection for the cervical spine region, the thoracic spine region, and the lumbar spine region corresponding to the back.

9. The armor made from a composite elastomer according to claim 8, characterized in that: The composite elastomer is also arranged on the side waist and / or the shoulder and neck formed by the connection of the front chest piece and the back piece.

10. The armor made from a composite elastomer according to claim 1, characterized in that: The coating treatment adopts a method of spraying, dipping, or electroplating, and the treatment liquid penetrates into the internal pores of the lattice point array structure elastomer during the coating treatment.

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