A crash pad for a protective product

Abstract

The utility model relates to a kind of anti-collision rubber strips for protective products, the anti-collision rubber strip includes base layer and the anti-collision array attached above the base layer;The anti-collision array is composed of several anti-collision columns;The anti-collision column is full hollow structure or partial hollow structure with solid bottom and hollow top portion.The anti-collision rubber strip can be used in anti-collision glove, knee pad, elbow pad, shoulder pad, back pad, helmet and other fields.

Description

Technical Field

[0001] This utility model relates to the field of protective equipment technology, specifically, to an anti-collision strip for protective products. Background Technology

[0002] With the rapid development of China's market economy, the role and function of workplace safety have undergone a new transformation. It is not only a basic requirement for human survival and social stability, but also a fundamental means of socio-economic development. Especially in high-risk environments such as construction sites, protective equipment is used to protect hands, elbows, and knees from bumps and abrasions. Most existing protective equipment is made of cotton, which has poor impact and collision protection. If hard objects fall on these body parts, it is not conducive to protection. Therefore, it is necessary to provide a widely applicable anti-collision strip for protective products. This strip can be installed on any protective product to cushion external impacts and collisions.

[0003] Most existing anti-collision strips are solid structures with considerable thickness. Although solid anti-collision strips can provide a certain degree of protection for the human body, the deformation of a solid structure is limited in the process of absorbing external impact energy. Therefore, improving anti-collision performance can only be achieved by increasing the thickness of the anti-collision strip, which makes the anti-collision protective equipment more cumbersome, reduces flexibility, and seriously affects wearing comfort. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a shock-absorbing strip with good comfort for protective products. The shock-absorbing strip has a shock-absorbing array formed by shock-absorbing pillars on the base layer. The shock-absorbing pillars can be solid, fully hollow, or partially hollow. The shock-absorbing array can effectively deform and absorb energy. In particular, the shock-absorbing pillars with fully hollow and partially hollow structures can effectively buffer external impacts and bumps due to the change in their geometric structure.

[0005] The present invention adopts the following technical solution: an anti-collision strip for protective products, the anti-collision strip includes a base layer and an anti-collision array attached above the base layer; the anti-collision array is composed of a plurality of anti-collision pillars; the anti-collision pillars are either a fully hollow structure or a partially hollow structure with a solid bottom and a hollow top.

[0006] Preferably, the base layer is a continuous planar layer, and the thickness of the base layer is 0.2-10 mm.

[0007] Preferably, the anti-collision array is formed by arranging a plurality of anti-collision columns at a uniform spacing, wherein the anti-collision columns are independent of each other and the spacing between the anti-collision columns is 0.5-10 mm.

[0008] Preferably, the outer contour of the crash barrier is a column or frustum, including but not limited to a cylinder, frustum of a cone, prism, and frustum of a cone, or variations or derivatives of one or more of the above; the base area of ​​the crash barrier is 1-100 mm. 2 The height is 1-10 mm; the bottom area of ​​the anti-collision array accounts for 10-98% of the area of ​​the base layer.

[0009] Preferably, the hollow portion of the fully hollow structure and the partially hollow structure accounts for 0-80% of the volume of the anti-collision column.

[0010] Preferably, the hollow portion of the fully hollow structure and the partially hollow structure is inverted conical, cylindrical, prismatic, or inverted frustum shape.

[0011] Preferably, both the base layer and the anti-collision column are elastomers, and the anti-collision strip structure is an integrally formed structure of the anti-collision column and the base layer; the thickness of the base layer is 0.2-5 mm, and the base layer is a continuous planar layer or has a partially hollowed-out portion.

[0012] Preferably, the hollowed-out portion is a full hollowed-out portion with the same shape as the bottom surface of the anti-collision column, or a linear hollowed-out portion with the same shape as the edge portion of the anti-collision column.

[0013] Preferably, the base layer is a fabric, and the anti-collision pillar is an elastomer; the fabric structure is a knitted or woven fabric with a thickness of 0.2-10 mm; the knitted fabric includes, but is not limited to, plain weave, rib, double reverse, plain warp, satin warp, and double warp weave; the woven fabric includes, but is not limited to, plain weave, twill weave, satin weave, jacquard, double layer, double weave, honeycomb, orthogonal, corner interlocking, multi-layer joint structure, and suede.

[0014] Preferably, the fabric is a woven or fabric made from one or more of ultra-high molecular weight polyethylene, aramid, polyester, nylon, and cotton.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0016] (1) Under the premise of the same anti-collision effect, the anti-collision strip of this utility model has a low thickness and light weight. In particular, the strip has good flexibility and is comfortable to wear when used in personal protective equipment.

[0017] (2) When the anti-collision strip of this utility model is compressed by impact, the hollow structure and part of the hollow structure of the anti-collision column can provide reasonable geometric structure change space, which helps to deform and absorb energy, help buffer, and effectively improve the anti-collision effect. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the anti-collision rubber strip of this utility model;

[0019] Figure 2 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses an elastic base layer and the anti-collision column is a partially hollow hexagonal truncated pyramid.

[0020] Figure 3 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses an elastic base layer and the anti-collision column is a partially hollow frustum.

[0021] Figure 4 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses an elastic base layer and has hollow hexagonal prisms as anti-collision pillars;

[0022] Figure 5 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses an elastic base layer and has a partially hollow hexagonal truncated pyramidal column.

[0023] Figure 6 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses an elastic base layer and has an irregularly shaped polygonal prism with completely hollow anti-collision columns;

[0024] Figure 7 This is a schematic diagram of the anti-collision rubber strip structure of the present invention, which uses a fabric base layer and has a partially hollow hexagonal truncated pyramidal anti-collision column.

[0025] Figure 8 This is a top view of the anti-collision rubber strip structure of the present invention, which adopts a partially hollow elastic base layer and the anti-collision column is a partially hollow hexagonal truncated pyramid.

[0026] Figure 9 This is a bottom view of the anti-collision strip structure of this utility model, which uses a partially hollow elastic base layer and a partially hollow hexagonal truncated pyramid as the anti-collision column.

[0027] In the diagram: 1 - base layer, 2 - anti-collision pillar, 3 - hollow part, 11 - elastomer base layer, 12 - fabric base layer, 3 - hollow part. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Any technical features or connections of this utility model not described in detail are existing technologies. To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. For clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0029] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] A type of anti-collision strip used in protective products, such as Figure 1 As shown, the anti-collision strip includes a base layer 1 and an anti-collision array attached to the base layer. The base layer 1 is a continuous planar layer with a thickness of 0.2-10 mm. The anti-collision array is formed by a plurality of anti-collision posts 2 arranged at uniform intervals. The outer contour shape of the anti-collision posts 2 is a column or frustum, including but not limited to cylinders, frustums of cones, prisms, and frustums of prisms, or variations or derivatives of one or more combinations thereof. The anti-collision posts 2 are independent of each other, with a spacing of 0.5-10 mm between adjacent anti-collision posts 2 and a height of 1-10 mm. The base area of ​​a single anti-collision post 2 is 1-100 mm². 2 The resulting anti-collision array has a planar coverage rate of 10-98% for the base layer 1. The anti-collision pillar 2 can be a fully hollow structure or a partially hollow structure with a solid bottom and a hollow top. For fully hollow and partially hollow structures, the hollow portion can be an inverted cone, cylinder, prism, or inverted frustum shape, and the volume of the hollow portion accounts for 0-80% of the volume of the anti-collision pillar 2. In some embodiments of this invention, the anti-collision pillar 2 can also be designed as a solid structure. Under the same parameters, the anti-collision performance of fully hollow and partially hollow structures is better than that of solid structures.

[0032] The shape and volume ratio of the hollow portion have an impact on impact resistance performance that is not a simple linear relationship. When designing the shape and volume ratio of the hollow portion, it is also necessary to take into account parameters such as the hardness and modulus of the material used, as well as the shape of the impact resistance array. When the hardness is relatively high, the larger the volume of the hollow portion, the better the impact resistance performance. When the hardness is relatively low, the larger the volume of the hollow portion, the worse the impact resistance performance. When the material hardness is moderate, the impact resistance performance first increases and then decreases as the volume ratio of the hollow portion increases.

[0033] The crash barrier 2 can be molded integrally with the base layer 1, meaning both the base layer 1 and the crash barrier 2 are elastomers, such as... Figure 2-6As shown, an integrally molded anti-collision strip is formed, in which the base layer 1 is an elastomer base layer 11 with a thickness of 0.2-5mm; the anti-collision pillar 2 can also be molded separately and combined with fabric, such as Figure 7 As shown, the base layer 1 is made of fabric, and the anti-collision pillar 2 is made of elastomer, forming a composite anti-collision strip. The composite method is usually hot-press bonding. In this case, the base layer 1 is a fabric base layer 12 with a thickness of 0.2-10 mm. The anti-collision strip can be designed with different thicknesses according to requirements, thereby obtaining products with different protection levels.

[0034] The elastomer is typically an energy-absorbing material, and can be one or more of the following: thermoplastic styrene elastomer (TPS), polyolefin thermoplastic elastomer (TPO), thermoplastic polyurethane (TPU), polyvinyl chloride (PVC), polyesteramide (PEA), polyether ester amide (PEEA), polycarbonate amide (PCEA), polyester thermoplastic elastomer (COPE), thermoplastic dynamic vulcanizate (TPV), and polydimethylsiloxane (PDMS). The fabric is a woven or knitted fabric made from one or more of the following raw materials: ultra-high molecular weight polyethylene, aramid, polyester, acrylic, vinylon, spandex, chlorofiber, polypropylene, viscose fiber, nylon, and cotton. The fabric structure is either knitted or woven. Knitted fabrics include, but are not limited to, plain weave, rib, double reverse, plain warp, warp satin, and double warp weave; woven fabrics include, but are not limited to, plain weave, twill, satin, jacquard, double layer, double weave, honeycomb, orthogonal, interlocking, multi-layered joint structures, and suede.

[0035] Generally, whether it's the anti-collision array or the base layer, the greater the thickness, the better the anti-collision performance. However, the flexibility decreases with increasing thickness. In practical applications, the requirements for anti-collision strips are not only about anti-collision performance, but also about their flexibility, wearing comfort after application to protective equipment, and the weight of the strip. Taking anti-collision gloves as an example, the fingers are more flexible and require higher flexibility in the anti-collision strip, so the base of the anti-collision strip cannot be too thick. On the other hand, the back of the hand does not require high flexibility, so the requirement for base thickness is lower, and the anti-collision performance of the back of the hand can be improved by appropriately increasing the thickness.

[0036] Based on the above requirements, if the base layer of the one-piece molded structure is relatively thin, and the strength of the material used at that thickness is insufficient to guarantee its bonding effect when sewn onto the protective fabric, then a fabric base layer 12 is used instead of the elastomer base layer 11. The impact-resistant effect of the fabric base layer 12 mainly depends on the elastomer. At the same thickness as the elastomer base layer 11, the fabric base layer 12 will have better flexibility than the elastomer base layer 11.

[0037] Furthermore, the elastic matrix layer 11 can also be partially perforated. For example... Figure 8-9As shown, the elastic base layer 11 has a perforated portion 3. The shape of the perforated portion 3 is not limited; it can be consistent with the bottom shape of the anti-collision column 2, such as a fully hexagonal perforation; or it can be a linear perforation consistent with the edge of the anti-collision column shape, such as a V-shaped linear perforation. On the one hand, when the anti-collision array is impacted, the perforated portion 3 can provide deformation space for the anti-collision column 2, which can better absorb energy; on the other hand, when the thickness of the elastic base layer 11 is large, the perforated portion 3 can ensure that the part has a certain degree of flexibility, making the anti-collision strip more flexible. Considering the strength of the elastic base layer 11 of the anti-collision strip and its bonding firmness with the protective equipment, excessive perforation should be avoided. Generally, the distribution position and perforation ratio of the perforated portion 3 are designed according to the protective equipment to which the anti-collision strip of this utility model is applied. The distribution of the perforated portion 3 can be designed as a single area or as several areas, but its overall proportion should not exceed 60% of the elastic base layer. For example, when applied to anti-collision gloves, the V-shaped linear hollow design is placed at the joint on the back of the hand, and the regular hexagonal hollow design is distributed on the back of the hand. At this time, care should be taken to avoid the two being too close to ensure the connection strength of the anti-collision strip. The combination of hollow parts of different shapes ensures that when the anti-collision strip of this utility model is applied to anti-collision gloves, it does not affect its anti-collision performance and also ensures the flexibility of the hand.

[0038] Besides the shape of the crash barriers, two other crucial factors affecting their impact resistance are the height and rigidity of the crash barrier modules. Crash barrier arrays with the same design but different materials, or even the same material but different heights, will impart different levels of impact resistance. Therefore, the thickness of the crash barrier array should be at least 1 mm, and the Shore hardness should be within the range of 5-80 HD.

[0039] In terms of manufacturing process, for an integrated structure where both the base layer and the anti-collision pillar are elastomers, the anti-collision strip of this utility model adopts a drip molding or injection molding process, and the specific process is as follows:

[0040] S1. Design the dimensions of the anti-collision strips according to requirements and customize the metal mold;

[0041] S2. Select materials according to requirements and prepare thermoplastic elastomer / plasticizer mixtures at the appropriate temperature;

[0042] S3. The thermoplastic elastomer / plasticizer mixture is filled into the mold by dripping or injection molding;

[0043] S4. Place the mold in a flat vulcanizing machine, heat it at 200°C for 1 minute, then remove and cool it.

[0044] The preparation method for a base layer made of fabric and a bumper post made of elastomer includes two approaches. One approach involves directly molding the bumper post onto the fabric surface. In step S3, the fabric is placed in a mold, and then the thermoplastic elastomer / plasticizer mixture is filled into the mold via drip molding or injection molding. The other approach involves molding the bumper post separately and then combining it with the fabric base layer. Specifically, in step S1, the mold used does not contain the base layer. In step S4, when the mold begins to cool, the fabric base layer is placed over the thermoplastic elastomer / plasticizer mixture, and the mixture is pressurized at 500N for 1 minute in a flat vulcanizing machine.

[0045] Steps S1-4 above describe the process for preparing the integrated anti-collision strip in some embodiments, including where both the base layer and the anti-collision pillars are elastomers, or where the base layer is fabric and the anti-collision pillars are elastomers. In other composite structure embodiments, the base layer of the anti-collision strip is fabric. According to the grading requirements of the ANSI / ISEA 138-2019 anti-collision product standard, as shown in Table 1, this invention can achieve a level of 1-3.

[0046] Table 1 Impact Resistance Classification

[0047] performance level Average impact penetration force (kN) Maximum impact penetration force (kN) Level 1 ≤9.0 <11.3 Level 2 ≤6.5 ≤8.1 Level 3 ≤4.0 ≤5.0 Example 1

[0048] The material used is PVC with a Shore hardness of 10HD. The anti-collision array consists of several hexagonal truncated pyramids with solid bottoms and hollow tops, such as... Figure 2 As shown, the platform is 3.8 mm high and has a top area of ​​8 mm². 2 , base area 15 mm 2 The hollow part is an inverted cone shape, with a base area of ​​2.3 mm. 2 The height is 2.8 mm, the spacing between each array is 1 mm, and the thickness of the substrate is 1 mm. Example 2

[0049] The PVC material used has a Shore hardness of 20HD, and the rest is the same as in Example 1. Example 3

[0050] The PVC material used has a Shore hardness of 40HD, and the rest is the same as in Example 1. Example 4

[0051] The anti-collision hexagonal frustum array, solid at the bottom and hollow at the top, has a height of 5 mm and a top area of ​​8 mm². 2 The bottom area is 15mm. 2 The hollow part is an inverted cone shape, such as Figure 2 As shown, the base area of ​​the cone is 2.3 mm. 2The height is 4 mm, the thickness of the substrate is 0.2 mm, and the rest is the same as in Example 1. Example 5

[0052] The PVC material used has a Shore hardness of 25HD, and the rest is the same as in Example 4. Example 6

[0053] The PVC material used has a Shore hardness of 80HD, and the rest is the same as in Example 4. Example 7

[0054] The material used is PVC with a Shore hardness of 10HD. The anti-collision array consists of several anti-collision frustums with solid bottoms and hollow tops, such as... Figure 3 As shown, the platform is 5 mm high and has a top area of ​​7 mm. 2 The bottom area is 12.6 mm. 2 The hollow part is an inverted cone shape, with a base area of ​​3 mm. 2 The height is 4 mm, the spacing between each array is 1 mm, and the thickness of the substrate is 1 mm. Example 8

[0055] The material used is PVC with a Shore hardness of 10HD. The anti-collision array consists of several hollow hexagonal prisms, such as... Figure 4 As shown, the platform is 5 mm high and has a base area of ​​15 mm². 2 The hollow part is cylindrical, and the base area of ​​the cylinder is 2.3 mm. 2 The height is 5 mm, the spacing between each array is 1 mm, and the thickness of the substrate is 1 mm. Example 9

[0056] The material used is PVC with a Shore hardness of 10HD. The anti-collision array consists of several hollow hexagonal prisms, such as... Figure 4 As shown, the platform is 1 mm high and has a base area of ​​15 mm². 2 The hollow part is cylindrical, and the base area of ​​the cylinder is 2.3 mm. 2 The height is 5 mm, the spacing between each array is 10 mm, and the thickness of the substrate is 5 mm. Example 10

[0057] The anti-collision array spacing is 0.5mm, and the rest is the same as in Example 1. Example 11

[0058] The material used is TPU with a Shore hardness of 5HD. The anti-collision array consists of several hexagonal truncated pyramids with solid bottoms and hollow tops. Figure 5 As shown, the platform is 10 mm high and has a top area of ​​75 mm². 2 Base area 100 mm2 The hollow part is an inverted hexagonal frustum, and the base area of ​​the frustum is 55 mm². 2 The height is 8 mm, the spacing between each array is 5 mm, and the thickness of the substrate is 1 mm. Example 12

[0059] The substrate is a plain weave polyester fabric with a thickness of 1.2 mm, such as... Figure 6 As shown, the rest is the same as in Example 1. Example 13

[0060] The material used is PVC with a Shore hardness of 80HD. The anti-collision array consists of several irregularly shaped, fully hollow hexagonal prisms, such as... Figure 7 As shown, the platform is 6mm high, the wall thickness of the hollow hexagonal prism is 1mm, the spacing between each array is 1mm, and the thickness of the base is 1.5mm. Example 14

[0061] The material used is PVC with a Shore hardness of 20HD. The anti-collision array consists of several hexagonal truncated pyramids with solid bottoms and hollow tops, such as... Figure 8 As shown, the platform is 6.6 mm high and has a top area of ​​13.5 mm². 2 The bottom area is 31 mm. 2 The hollow part is an inverted cone, with a base area of ​​7 mm². 2 The height is 5.6 mm, the spacing between each array is 1.5 mm, the thickness of the base is 1 mm, the base layer has several hexagonal cutouts, and there are several cutouts in the gaps between adjacent arrays. The shape of the cutout hexagons is consistent with the shape of the hexagons at the bottom of the array, which is a V-shaped linear cutout. The width of the cutouts between arrays is the width of the gaps between adjacent arrays. Comparative Example 1

[0062] The material used is PVC with a Shore hardness of 10HD. The anti-collision strip is a solid sheet with a thickness of 4.8mm. Comparative Example 2

[0063] The material used is PVC with a Shore hardness of 80HD. The anti-collision strip is a solid sheet with a thickness of 4.8mm. Comparative Example 3

[0064] The material used is PVC with a Shore hardness of 10HD. The anti-collision strip is a solid sheet with a thickness of 10mm.

[0065] Table 2 Test Indicators of Examples 1-13 and Comparative Examples 1-3

[0066]

[0067] It is evident that the anti-collision strip of this invention can effectively improve the absorption of impact energy by protective equipment and has good anti-collision performance.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, designed to facilitate a detailed understanding of the technical solutions of the present invention, but should not be construed as limiting the scope of protection of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided by the present invention through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this invention patent should be determined by the content of the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A shock-absorbing strip for protective products, characterized in that, The anti-collision strip includes a base layer and an anti-collision array attached to the base layer; the anti-collision array consists of several anti-collision pillars; the anti-collision pillars are either fully hollow or partially hollow with a solid bottom and a hollow top.

2. The anti-collision strip for protective products according to claim 1, characterized in that, The base layer is a continuous planar layer or a partially perforated planar layer, and the thickness of the base layer is 0.2-10 mm.

3. The anti-collision strip for protective products according to claim 2, characterized in that, The anti-collision array is formed by arranging several anti-collision columns at a uniform interval. The anti-collision columns are independent of each other, and the distance between the anti-collision columns is 0.5-10 mm.

4. The anti-collision strip for protective products according to claim 3, characterized in that, The outer contour of the crash barrier is a column or frustum, including cylinders, frustums of cylinders, prisms, and frustums of prisms, or variations or derivatives of one or more of the above; the base area of ​​the crash barrier is 1-100 mm². 2 The height is 1-10 mm; the bottom area of ​​the anti-collision array accounts for 10-98% of the area of ​​the base layer.

5. The anti-collision strip for protective products according to claim 3, characterized in that, The hollow portion of the fully hollow structure and the partially hollow structure accounts for 0-80% of the volume of the anti-collision platform.

6. The anti-collision strip for protective products according to claim 3, characterized in that, The hollow portion of the fully hollow structure and the partially hollow structure is in the shape of an inverted cone, cylinder, prism, or inverted frustum.

7. The anti-collision strip for protective products according to claim 2, characterized in that, Both the base layer and the anti-collision pillar are elastomers, and the anti-collision strip structure is an integrally formed structure of the anti-collision pillar and the base layer; the thickness of the base layer is 0.2-5 mm, and the base layer is a continuous planar layer or has several hollow parts.

8. The anti-collision strip for protective products according to claim 7, characterized in that, The hollowed-out portion is either a full hollowed-out portion with the same shape as the bottom surface of the anti-collision column, or a linear hollowed-out portion with the same shape as the edge of the anti-collision column.

9. The anti-collision strip for protective products according to claim 2, characterized in that, The base layer is a fabric, and the anti-collision pillars are elastomers; the fabric structure is knitted or woven, with a thickness of 0.2-10 mm; the knitted fabric includes plain weave, rib, double reverse, plain warp, satin warp, and double warp weave; the woven fabric includes plain weave, twill weave, satin weave, jacquard, double layer, double weave, honeycomb, orthogonal, corner interlocking, multi-layer joint structure, and suede.

10. A shock-absorbing strip for protective products according to claim 9, characterized in that, The fabric is a woven or fabric made from one or more of the following raw materials: ultra-high molecular weight polyethylene, aramid, polyester, nylon, and cotton.

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