Neck safety protection module for small-equivalent initiating explosive device

Abstract

The invention belongs to the field of safety protection of initiating explosive devices, and discloses a neck safety protection module for small-equivalent initiating explosive devices, the neck safety protection module comprises a protection layer located on the outer side and a buffer layer located on the inner side, the protection layer is arranged in a split mode and comprises a left protection module, a rear protection module and a right protection module, and each protection module is provided with a connecting structure. Every two protective sleeves are detachably connected with each other, so that the neck part is annularly protected. According to the neck safety protection module, the overall structure is independent of existing safety protection equipment, safety protection is specially conducted on the neck area, and the neck safety protection module can be used in cooperation with other protection products; and the protective clothing can be suitable for different wearers with different sizes, and has the advantages of comprehensive protection, good protective force, high flexibility and comfort in wearing.

Description

Technical Field

[0001] The invention belongs to the field of safety protection of pyrotechnics, and in particular, relates to a neck safety protection module for small-equivalent pyrotechnics. Background Art

[0002] Propellants, detonators, fuses, detonators and other explosive products are inherently dangerous and can burn and explode. If they are not handled with care, they may cause serious safety accidents such as personal injury and property loss to people in close contact. Although existing pyrotechnic operation sites require operators to wear certain safety protection equipment and play a certain protective role, they lack safety protection for the early series of processes such as the development, testing, packaging and transportation of small equivalent (≤20g TNT equivalent) pyrotechnics. Direct use of existing safety protective clothing will result in defects including mismatched protection levels, heavy weight, and inflexibility. In particular, the neck area has insufficient protection, inflexibility, and discomfort, which are very prominent and need to be solved urgently.

[0003] The Chinese patent with the patent number CN202375127U discloses a lightweight explosion-proof helmet, which is composed of an explosion-proof head guard and a fiber cloth cap. The explosion-proof head guard is composed of a fiberglass outer shell and a fiberglass inner shell with a spring buffer layer sandwiched between them. The explosion-proof head guard is connected to the fiber cloth cap of the inner layer through the inner ring of the brim of the fiberglass inner shell by connecting screws. The technology does not protect the neck.

[0004] The Chinese patent with patent number CN220800186U discloses a helmet with a fire cape, including a helmet body and a fire cape, a plurality of limit clamps are arranged on both sides of the helmet body, the limit clamps include a pressing part pressed against the helmet body, the fire cape includes an elastic part and a cape part, the elastic part is clamped in the limit clamps and prevented from coming out under the action of the pressing part, the cape is clamped to the outside of the helmet by an elastic band, and the fire cape is further fixed by a limit clamp, the elastic band is arranged above the brim extending outward, so that the fire cape is installed more stably. The helmet is used for firefighting, and its main function is fire prevention, but its protection function against explosion impact force is insufficient.

[0005] In general, the direct use of current protective equipment in the early stage of small-equivalent pyrotechnic operation scenarios is not only a waste of resources, which greatly increases the investment cost, but also hinders the normal work of operators and reduces production efficiency. Since the neck area is a weak area of ​​the human body, once it is damaged, it is very likely to cause serious consequences. It is very urgent and necessary to ensure the safety of the neck area of ​​operators during the operation of small-equivalent pyrotechnics.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome at least one of the deficiencies of the prior art, provide a neck safety protection module for small-equivalent pyrotechnics, and solve the problem that the current protective clothing has insufficient protection ability for the operator's neck area, is inflexible, and is uncomfortable to wear in the series of processes such as the development, testing, packaging, and transportation of small-equivalent pyrotechnics in the early stage. The neck safety protection module of the present invention has the advantages of comprehensive protection, good protection, high flexibility, and comfortable wearing.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] In the first aspect, the present invention provides a neck safety protection module for small-equivalent pyrotechnics, including a protective layer located on the outside and a buffer layer located on the inside. The protective layer is separately arranged, including a left protection module, a rear protection module and a right protection module. Each protection module is provided with a connecting structure, which can be detachably connected to each other to provide annular protection for the neck.

[0010] In a further embodiment, the connection structure is selected from one or a combination of Velcro or snap fasteners;

[0011] Preferably, the connecting structure is Velcro.

[0012] In a further solution, the parts of the left side protection module and the right side protection module close to the back neck are respectively bonded to the outer side of the back side protection module by Velcro;

[0013] Preferably, the outer side of the rear protection module is provided with a Velcro fleece surface / hook surface, and the inner sides of the left protection module and the right protection module near the back of the neck are provided with a Velcro hook surface / fleece surface.

[0014] In a further solution, the left protection module and the right protection module are bonded at one end close to the throat by Velcro;

[0015] Preferably, the outer side / inner side of the left protection module near the throat is provided with a Velcro hook surface / fleece surface, and the inner side / outer side of the right protection module near the throat is provided with a Velcro fleece surface / hook surface.

[0016] In a further solution, the inner sides of the left side protection module, the rear side protection module and the right side protection module are all bonded to the outer side of the buffer layer by Velcro;

[0017] Preferably, the entire outer side of the buffer layer is provided with a hook surface or a fleece surface of Velcro;

[0018] Preferably, the entire inner side of the rear protection module is provided with a Velcro fur surface or a hook surface;

[0019] Preferably, the buffer layer is an integral structure, an independent module, and then connected with other protection modules.

[0020] In a further embodiment, the material of the buffer layer is selected from one or more of EVA, EPE, and ACF.

[0021] In a further solution, each protective module of the protective layer comprises an outer layer and an inner layer; the inner layer material is aramid non-woven fabric;

[0022] Preferably, the outer layer material is selected from Oxford cloth, nylon cloth, polyester cloth or Cordura fabric.

[0023] In a further solution, the inner layer material is an aramid non-woven fabric woven with a modified resin adhesive;

[0024] Preferably, the mass fraction of the modified resin adhesive in the aramid non-woven fabric is 30%-40%.

[0025] In a further embodiment, the modified resin adhesive comprises the following components in parts by weight:

[0026] 100 parts by weight of waterborne polyurethane

[0027] Poly(hexamethylene adipate) 100 parts by weight

[0028] Dibutyltin dilaurate 10-15 parts by weight

[0029] 10-12 parts by weight of organic amine compound alcohol dispersion

[0030] 10-12 parts by weight of nanofiller alcohol dispersion

[0031] Castor oil 6-8 parts by weight

[0032] 3-5 parts by weight of dimethylsiloxane

[0033] 1 to 3 parts by weight of fatty alcohol.

[0034] The main component of the existing adhesive formula is polyurethane, and the auxiliary materials are water, stabilizer, etc. The bonding strength between this adhesive and aramid non-woven fabric is poor, and the surface performance and softness need to be further improved.

[0035] In the present invention, the main components of the adhesive are improved to water-based polyurethane and polyhexylene adipate, and various modified additives such as dibutyltin dilaurate, organic amine compound alcohol dispersion, nanofiller alcohol dispersion, castor oil, dimethylsiloxane, and fatty alcohol are added. By optimizing the main components to water-based polyurethane and polyhexylene adipate, not only can the advantages of the two be fully utilized to improve the apparent quality and protective performance of the woven aramid non-woven fabric, but also the weaving efficiency of the aramid non-woven fabric can be improved on the basis that polyhexylene adipate has strong initial adhesion, and the workshop production capacity is improved. The adhesive is compositely modified and optimized by additives, the bonding strength, apparent performance and softness between the adhesive and the aramid fiber are improved, the moisture resistance, aging resistance, chemical corrosion resistance, heat resistance and cold resistance, weather resistance and other stability of the aramid non-woven fabric are improved, and the stability of the adhesive is improved, the shelf life of the adhesive is increased, and the weaving efficiency of the aramid non-woven fabric is further improved. In addition, the preparation process does not produce three wastes.

[0036] Specifically, waterborne polyurethane belongs to a class of polymer compounds. It is a new type of polyurethane system that uses water instead of organic solvents as a dispersion medium. It is also called water-dispersible polyurethane, water-based polyurethane or water-based polyurethane. The molecular structure of waterborne polyurethane contains carbamate groups, urea bonds and ionic bonds, and has high cohesive energy and strong bonding force. The performance of polyurethane can be adjusted by changing the length of the soft segment and the ratio of the soft and hard segments. As the main body of the resin adhesive, waterborne polyurethane has many advantages such as non-toxic and environmentally friendly, good mechanical properties (excellent wear resistance, flexibility, low temperature resistance and fatigue resistance), bonding performance (high bonding strength, can bond metals, non-metals and other materials), good adjustability and can adapt to different application requirements. Waterborne polyurethane has good compatibility with aramid fibers, which is conducive to weaving aramid non-woven fabrics with excellent appearance quality and protective properties.

[0037] Poly(hexanediol adipate) has good compatibility with waterborne polyurethane and aramid fiber, which is conducive to weaving aramid non-woven fabric with excellent surface quality and protective performance. Poly(hexanediol adipate) has good wear resistance and oil resistance, so that the woven aramid non-woven fabric will not be easily damaged by friction and other factors during repeated use, thereby affecting the protective performance. Due to the large intermolecular cohesive energy, the adhesive made of poly(hexanediol adipate) has high strength characteristics, including tensile strength and peel strength, which helps to improve the protective performance of aramid non-woven fabric. Poly(hexanediol adipate) adhesive has good initial adhesion, can quickly bond materials, and can improve the weaving efficiency of aramid non-woven fabric. Poly(hexanediol adipate) has good hydrolysis resistance and good compatibility with water-based polyurethane adhesives and aramid fibers, which improves the stability of the modified resin adhesive and the moisture resistance of the woven aramid non-woven fabric. It is also resistant to chemical corrosion and can improve the chemical stability of the woven aramid non-woven fabric, providing more safety protection for the wearer.

[0038] Dibutyltin dilaurate has excellent transparency, lubricity, and weather resistance. The finished product has good surface gloss and transparency after processing, and has no sulfide pollution. Dibutyltin dilaurate can improve the apparent quality of the woven aramid non-woven fabric, and further improve the softness of the aramid non-woven fabric, making it more comfortable to wear.

[0039] In a further embodiment, the alcohol dispersion of organic amine compounds is selected from one or more of triethylamine, diethylamine, and dimethylamine in ethylene glycol. As a preferred embodiment, the alcohol dispersion of organic amine compounds is a 20% triethylamine in ethylene glycol dispersion.

[0040] Organic amine compounds such as triethylamine, as an organic base, can be used as a curing agent for adhesives such as polyurethane, promote the curing reaction of the adhesive, and improve the weaving efficiency of aramid non-woven fabrics; improve the bonding properties of the adhesive, increase the bonding strength and durability; and can also reduce viscosity, increase fluidity, and improve the process performance of the adhesive.

[0041] The nanofiller alcohol dispersion is selected from one or more of graphene oxide and ethylene glycol dispersion of carbon nanotubes. As a preferred embodiment, the nanofiller alcohol dispersion is 30% graphene oxide ethylene glycol dispersion.

[0042] Nanofillers such as graphene oxide have high mechanical strength and modulus, which can significantly improve the mechanical properties of adhesives; they can improve the thermal stability of adhesives and enhance their application capabilities in high temperature environments. The addition of graphene oxide can also increase the bonding strength between adhesives and bonded materials; and improve the chemical corrosion resistance of adhesives, allowing them to maintain performance in harsh environments.

[0043] Castor oil belongs to the category of oils and fats. It is a non-volatile, non-irritating oil, mainly composed of glycerol esters of higher fatty acids composed of ricinoleic acid (12-hydroxyoctadec-9-enoic acid) and oleic acid. Castor oil has good compatibility with other components in the modified resin adhesive formula. Castor oil has excellent hydrolysis resistance, and the coating will not bubble after long-term immersion in water, which improves the stability of the woven aramid non-woven fabric and has better moisture-proof performance. Castor oil exhibits good shock absorption and electrical insulation, improves the energy absorption characteristics of the woven aramid non-woven fabric, and has better protective performance. Castor oil-modified resin has the advantages of oil resistance, acid and alkali resistance, impact resistance, friction resistance and good gloss, and the woven aramid non-woven fabric has better apparent quality and stability. Castor oil-modified short-oil resin has strong adhesion, high fullness, good leveling and excellent mechanical properties. Polyurethane adhesive modified with castor oil has good low-temperature flexibility, and the woven aramid non-woven fabric is softer and more comfortable.

[0044] Dimethylsiloxane has good high and low temperature resistance and can be used in a wide temperature range. It can improve the safety and protection performance of aramid non-woven fabric in low and high temperature environments. Dimethylsiloxane has good compatibility with other components in the modified resin adhesive formula. Dimethylsiloxane is not easy to react with other substances and has excellent chemical stability; it has low surface tension and can provide good lubricity and waterproofness; it has good electrical insulation properties and is suitable for adhesives that require electrical insulation. Dimethylsiloxane has good weather resistance and can protect modified resin adhesives and aramid non-woven fabrics from environmental factors such as ultraviolet rays. Improve the stability of aramid non-woven fabrics in ultraviolet irradiation environments to avoid rapid failure of their protective properties. During the friction process, the silicon oxygen chain of dimethylsiloxane can migrate to the surface layer, reduce the friction coefficient, and improve the corrosion resistance of the polymer coating.

[0045] The fatty alcohol is selected from one or more of behenyl alcohol, stearyl alcohol and palmityl alcohol. Preferably, the fatty alcohol is behenyl alcohol.

[0046] Behenyl alcohol belongs to the fatty alcohol class and is a long-chain saturated fatty alcohol. Behenyl alcohol has good lubricity and can improve the feel of the woven aramid non-woven fabric and increase the wearing comfort. Behenyl alcohol has excellent viscosity stabilizing effect and can improve the viscosity stability of the modified resin adhesive and extend the shelf life of the modified resin adhesive.

[0047] In a further embodiment, the preparation method of the modified resin adhesive comprises:

[0048] (1) mixing waterborne polyurethane, poly(hexanediol adipate) and dibutyltin dilaurate, and stirring to obtain a mixed solution A;

[0049] (2) mixing the organic amine compound alcohol dispersion and the nanofiller alcohol dispersion, stirring, and obtaining an intermediate mixed solution B;

[0050] (3) Add castor oil, dimethylsiloxane, fatty alcohol, and intermediate mixed solution B to mixed solution A, stir, and perform ultrasonic dispersion to obtain a modified resin adhesive.

[0051] In a further embodiment, in step (1), the stirring speed is 700 to 1000 r / min and the stirring time is 20 to 30 min.

[0052] In a further embodiment, in step (2), the stirring speed is 300 to 500 r / min and the stirring time is 10 to 20 min.

[0053] In a further embodiment, in step (3), the stirring speed is 1000-1500 r / min, the ultrasonic power is 800 W, and the time is 30-50 min.

[0054] In step (3) of the present scheme, ultrasonic dispersion is performed while stirring, which can further improve the mixing effect and obtain a modified resin adhesive with uniform performance and good stability.

[0055] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0056] 1. The neck safety protection module for small-equivalent pyrotechnics provided by the present invention has an overall structure that is independent of existing safety protection equipment. It is specifically designed to provide safety protection for the neck area and can be used in conjunction with protective clothing and protective helmets to achieve all-round safety protection for the wearer.

[0057] 2. The neck safety protection module for small equivalent explosives provided by the present invention has a split structure design, and the Velcro between the left protection module and the rear protection module, and between the right protection module and the rear protection module can be bonded at different positions to achieve different lengths of adjustment (coarse adjustment) to meet the wearing needs of people of different body shapes. At the same time, the Velcro bonding position between the left protection module and the right protection module can be adjusted (finely adjusted) to achieve tightness adjustment. In this way, it is suitable for different wearers and needs, and has higher flexibility.

[0058] 3. The neck safety protection module for small-equivalent pyrotechnics provided by the present invention has an overall structure of an outer protective layer and an inner buffer layer. The outer layer plays a major protective role. The protective material is mainly aramid non-woven fabric. The inner layer is close to the body and is matched with a buffer layer. The constituent materials are all soft and light, and the neck safety protection module is more comfortable to wear as a whole.

[0059] 4. In the neck safety protection module for small equivalent explosives provided by the present invention, in the inner layer of each protection module of the protective layer, the multi-layer aramid non-woven fabric is woven from a modified resin adhesive. In the modified resin adhesive, the adhesive is compositely modified and optimized by additives, which improves the bonding strength, surface performance and softness between the adhesive and the aramid fiber, and improves the moisture resistance, aging resistance, chemical corrosion resistance, heat resistance, cold resistance, weather resistance and other stability of the aramid non-woven fabric, which can play a better protective role.

[0060] 5. The neck safety protection module for small-equivalent pyrotechnics provided by the present invention has a 1.1g fragment ballistic limit V50 value of not less than 100m / s, excellent protection performance, and an independent split structure so that when the protection module is damaged, only the damaged part can be replaced, with low overall investment. At the same time, the protection module has a large market demand, low cost, and high cost performance.

[0061] 6. The neck safety protection module for small-equivalent pyrotechnics provided by the present invention has a simple production process, generates no three wastes during the preparation process, conforms to the concept of green and environmentally friendly sustainable development, and has significant social and economic benefits.

[0062] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0064] Figure 1 It is a front schematic diagram of the neck safety protection module for small equivalent explosives of the present invention (excluding the buffer layer);

[0065] Figure 2 This is a front unfolding schematic diagram of the neck safety protection module for small-equivalent explosives of the present invention (excluding the buffer layer);

[0066] Figure 3 It is a schematic diagram of the buffer layer of the neck safety protection module for small-equivalent pyrotechnics of the present invention.

[0067] In the figure:

[0068] 1. Right side protection module; 101. Right-left Velcro hook surface (the Velcro hook surface where the outer side of the right side protection module near the throat is bonded to the left side protection module); 102. Right-rear Velcro fleece surface (the Velcro fleece surface where the right side protection module is bonded to the rear side protection module); 103. Right-buffer Velcro fleece surface (the Velcro fleece surface where the inner side of the right side protection module is bonded to the buffer layer);

[0069] 2. Rear protection module; 201. Right-rear Velcro hook surface (the Velcro hook surface where the outer side of the rear protection module is bonded to the right side protection module); 202. Left-rear Velcro hook surface (the Velcro hook surface where the outer side of the rear protection module is bonded to the left side protection module); 203. Velcro fur surface on the inner side of the rear protection module;

[0070] 3. Left side protection module; 301. Left-right Velcro surface (the Velcro surface where the inner side of the left side protection module near the throat is bonded to the right side protection module); 302. Left-rear Velcro surface (the Velcro surface where the left side protection module is bonded to the rear side protection module); 303. Left-buffer Velcro surface (the Velcro surface where the inner side of the left side protection module is bonded to the buffer layer);

[0071] 4. Buffer layer.

[0072] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0074] Reference Figure 1-Figure 3 The present invention specifically provides a neck safety protection module for small-equivalent explosives, including a protective layer located on the outside and a buffer layer 4 located on the inside. The protective layer is separately arranged, including a left side protection module 3, a rear side protection module 2 and a right side protection module 1. Each protection module is provided with a connection structure, and the two can be detachably connected to each other to provide annular protection for the neck. The neck safety protection module of the present invention is independent of the existing safety protection equipment, specifically for the safety protection of the neck area, and can be used with protective clothing and protective helmets to achieve all-round safety protection for the wearer.

[0075] The neck safety protection module of the present invention includes an outer protection layer and an inner buffer layer 4. The protection layer is modularly arranged and divided into three modules, namely, a left protection module 3, a rear protection module 2 and a right protection module 1, which are respectively located on the left side, the rear side and the right side of the wearer's neck. The three modules can be detachably connected to each other to surround the wearer's neck. In this way, a 360° annular protection is formed for the wearer's neck to achieve all-round protection.

[0076] In the present invention, the connection structure between each protection module can adopt a method that can achieve flexible connection and separation in the prior art. For example, the connection structure can be selected from one or a combination of Velcro and snap fasteners. Each protection module can adopt a connection method, such as Velcro or snap fasteners; or two connection structures can be combined according to different requirements for fixing strength.

[0077] As a preferred embodiment, the connection structure of the present invention is Velcro, and the left side protection module 3, the rear side protection module 2 and the right side protection module 1 are all bonded by Velcro. Specifically:

[0078] The parts of the left protection module 3 and the right protection module 1 close to the back neck are respectively bonded to the outer sides of the rear protection module 2 with Velcro; the ends of the left protection module 3 and the right protection module 1 close to the throat are bonded with Velcro to achieve safe protection of the throat area.

[0079] The Velcro includes a fleece surface and a hook surface, which cooperate to achieve bonding. In the present invention, for the bonding between the left protection module 3, the rear protection module 2 and the right protection module 1, the fleece surface and the hook surface are respectively located at corresponding positions on the two modules to be bonded, so that bonding can be achieved. The specific positions of the fleece surface and the hook surface can be flexibly adjusted as needed.

[0080] As an optional embodiment, the outer side of the rear protection module 2 is provided with a Velcro fleece surface / hook surface, and the inner side of the left protection module 3 and the right protection module 1 near the back of the neck is provided with a Velcro hook surface / fleece surface. The outer / inner side of the left protection module 3 near the throat is provided with a Velcro hook surface / fleece surface, and the inner / outer side of the right protection module 1 near the throat is provided with a Velcro fleece surface / hook surface.

[0081] The present invention modularizes and separates the protective layer, and the Velcro between the left protective module 3 and the rear protective module 2, and between the right protective module 1 and the rear protective module 2 can be bonded at different positions to achieve different length adjustments (coarse adjustments) to meet the wearing needs of people of different body shapes. At the same time, the Velcro bonding position between the left protective module 3 and the right protective module 1 can be adjusted (finely adjusted) to achieve tightness adjustment. In this way, it is suitable for different wearers and needs, and has higher flexibility.

[0082] In the present invention, the inner sides of the left side protection module 3, the rear side protection module 2 and the right side protection module 1 are all bonded to the outer side of the buffer layer 4 by Velcro. The material of the buffer layer 4 is selected from one or more of EVA, EPE and ACF.

[0083] In the present invention, the outer protective layer plays a major protective role, and the skin-contacting surface is matched with a buffer layer 4. The constituent materials of the buffer layer 4 are all soft and light, making the neck safety protection module more comfortable to wear as a whole.

[0084] As an optional embodiment, the outer side of the buffer layer 4 is entirely provided with a Velcro hook surface or a fleece surface; the inner side of the rear protection module 2 is entirely provided with a Velcro fleece surface or a hook surface. The inner side of the left protection module 3 and the right protection module 1, which do not overlap with the rear protection module 2, can be partially provided with a Velcro fleece surface or a hook surface, or can be mostly provided with a Velcro fleece surface or a hook surface. The buffer layer 4 is provided as an integral structure.

[0085] In the above scheme, the outer side of the buffer layer 4 and the inner side of the rear protection module 2 are fully provided with Velcro, so the rear protection module 2 can be completely bonded to all parts of the buffer layer 4, with a large bonding area and high firmness, which can avoid spreading or shifting. Velcro is partially or mostly provided on the inner side of the left protection module 3 and the right protection module 1, so that it can be better bonded to different positions of the rear protection module 2 and the buffer layer 4, and different lengths can be adjusted to meet the wearing needs of people of different body shapes. At the same time, the Velcro bonding position between the left protection module 3 and the right protection module 1 can also be adjusted (fine-tuned) to achieve tightness adjustment. In this way, it is suitable for different wearers and needs, and has higher flexibility.

[0086] Example 1

[0087] Reference Figure 1-Figure 3 The neck safety protection module for small-equivalent pyrotechnics of this embodiment includes a protection layer located on the outside and a buffer layer 4 located on the inside.

[0088] The protective layer includes a right side protective module 1, a rear side protective module 2 and a left side protective module 3, and Velcro is provided on the right side protective module 1, the rear side protective module 2 and the left side protective module 3, so that they can be bonded to each other in pairs. The ends of the right side protective module 1 and the left side protective module 3 near the throat are also bonded by Velcro to achieve safe protection of the throat area.

[0089] The right side protection module 1 and the left side protection module 3 are bonded to the outside of the rear side protection module 2. The right side protection module 1 is provided with a right-rear Velcro velcro surface 102 on the inner side of the rear side protection module 2, and the left side protection module 3 is provided with a left-rear Velcro velcro surface 302 on the inner side of the rear side protection module 2. The two sides of the outer side of the rear side protection module 2 are provided with matching Velcro hook surfaces, wherein the Velcro hook surface at the bonding point between the outer side of the rear side protection module 2 and the right side protection module 1 is the right-rear Velcro hook surface 201, and the Velcro hook surface at the bonding point between the outer side of the rear side protection module 2 and the left side protection module 3 is the left-rear Velcro hook surface 202.

[0090] Both the fleece side and the hook side of the Velcro have a certain width, and the relative position can be adjusted to suit the size of different wearers.

[0091] The right side protection module 1 is provided with a right-left Velcro hook surface 101 on the outside near the throat, and the left side protection module 3 is provided with a left-right Velcro fur surface 301 on the inside near the throat. In this way, the right side protection module 1 and the left side protection module 3 are enclosed and bonded to protect the throat.

[0092] The outer side of the buffer layer 4 is provided with a hook surface of Velcro, and the inner side is a close-fitting surface. The inner side of the rear protection module 2 is provided with a Velcro fleece surface 203; the inner side of the right protection module 1 (the part not overlapping with the rear protection module 2) is provided with a right-slow Velcro fleece surface 103. The inner side of the left protection module 3 (the part not overlapping with the rear protection module 2) is provided with a left-slow Velcro fleece surface 303. In this way, each protection module is bonded to the buffer layer 4.

[0093] The rear protection module 2 is set to be rectangular or trapezoidal, and the width of the right protection module 1 and the left protection module 3 near the rear protection module 2 is greater than the width of the part near the throat. The width of the right protection module 1 and the left protection module 3 near the rear protection module 2 is similar to the width of the rear protection module 2. In this way, the back of the neck can be well protected and the flexibility of the neck safety protection module can be guaranteed.

[0094] Each protective module of the protective layer includes an outer layer and an inner layer; the outer layer fabric is Oxford cloth, and the inner layer material is a 5-layer aramid weftless cloth woven with modified resin adhesive; the mass fraction of the modified resin adhesive in the aramid weftless cloth is 35%. The aramid weftless cloth is packaged with waterproof heat-sealed cloth.

[0095] Wherein, the formula and preparation process of the modified resin adhesive are:

[0096] 800g of waterborne polyurethane, 800g of poly(hexanediol adipate), and 98.65g of dibutyltin dilaurate were mixed, and mechanical stirring was used at a speed of 800r / min, and a mixed solution A was obtained after 28min; 83.24g of 20% triethylamine ethylene glycol dispersion was mixed with 92.35g of 30% graphene oxide ethylene glycol dispersion, and mechanical stirring was used at a speed of 450r / min, and an intermediate mixed solution B was obtained after 15min; then 58.73g of castor oil, 26.81g of dimethylsiloxane, 13.26g of behenyl alcohol, and the intermediate mixed solution B were added to the mixed solution A, and mechanical stirring was used at a speed of 1200r / min, and ultrasonic dispersion was used at an ultrasonic power of 800W, and a modified resin adhesive was obtained after 40min.

[0097] Example 2

[0098] The structure of the neck safety protection module for small equivalent explosives is the same as that of Example 1, except that the formula and preparation process of the modified resin adhesive are as follows:

[0099] 1500g of waterborne polyurethane, 1500g of poly(hexanediol adipate), and 186.52g of dibutyltin dilaurate were mixed and mechanically stirred at a speed of 950r / min to obtain a mixed solution A after 22min; 160.33g of 20% triethylamine in ethylene glycol dispersion was mixed with 167.61g of 30% graphene oxide in ethylene glycol dispersion and mechanically stirred at a speed of 350r / min to obtain an intermediate mixed solution B after 18min; 110.37g of castor oil, 65.86g of dimethylsiloxane, 28.38g of behenyl alcohol, and the intermediate mixed solution B were then added to the mixed solution A and mechanically stirred at a speed of 1400r / min, and ultrasonic dispersion was used at an ultrasonic power of 800W to obtain a modified resin adhesive after 35min.

[0100] Example 3

[0101] The structure of the neck safety protection module for small equivalent explosives is the same as that of Example 1, except that the formula and preparation process of the modified resin adhesive are as follows:

[0102] 2300g of waterborne polyurethane, 2300g of poly(hexanediol adipate), and 270.56g of dibutyltin dilaurate were mixed and mechanically stirred at a speed of 900r / min to obtain a mixed solution A after 25min; 248.53g of 20% triethylamine in ethylene glycol dispersion was mixed with 265.72g of 30% graphene oxide in ethylene glycol dispersion and mechanically stirred at a speed of 500r / min to obtain an intermediate mixed solution B after 12min; 158.65g of castor oil, 95.64g of dimethylsiloxane, 53.27g of behenyl alcohol and the intermediate mixed solution B were then added to the mixed solution A and mechanically stirred at a speed of 1100r / min, ultrasonic dispersion was used at an ultrasonic power of 800W, and a modified resin adhesive was obtained after 45min.

[0103] Example 4

[0104] The structure of the neck safety protection module for small equivalent explosives is the same as that of Example 1, except that the formula and preparation process of the modified resin adhesive are as follows:

[0105] 1700g of waterborne polyurethane, 1700g of poly(hexanediol adipate), and 236.87g of dibutyltin dilaurate were mixed and mechanically stirred at a speed of 750r / min to obtain a mixed solution A after 26min; 198.52g of 20% triethylamine in ethylene glycol dispersion was mixed with 175.73g of 30% graphene oxide in ethylene glycol dispersion and mechanically stirred at a speed of 400r / min to obtain an intermediate mixed solution B after 14min; 122.91g of castor oil, 73.85g of dimethylsiloxane, 36.16g of behenyl alcohol, and the intermediate mixed solution B were then added to the mixed solution A and mechanically stirred at a speed of 1300r / min, and ultrasonic dispersion was used at an ultrasonic power of 800W to obtain a modified resin adhesive after 40min.

[0106] Example 5

[0107] The structure of the neck safety protection module for small equivalent explosives is the same as that of Example 1, except that the formula and preparation process of the modified resin adhesive are as follows:

[0108] 2100g of waterborne polyurethane, 2100g of poly(hexanediol adipate), and 293.46g of dibutyltin dilaurate were mixed and mechanically stirred at a speed of 850r / min to obtain a mixed solution A after 24min; 227.82g of 20% triethylamine in ethylene glycol dispersion was mixed with 241.67g of 30% graphene oxide in ethylene glycol dispersion and mechanically stirred at a speed of 380r / min to obtain an intermediate mixed solution B after 17min; 155.93g of castor oil, 97.65g of dimethylsiloxane, 49.13g of behenyl alcohol, and the intermediate mixed solution B were then added to the mixed solution A and mechanically stirred at a speed of 1250r / min, and ultrasonic dispersion was used at an ultrasonic power of 800W to obtain a modified resin adhesive after 50min.

[0109] Comparative Example 1 Existing Adhesive

[0110] This comparative example has the same structure as the neck safety protection module for small equivalent pyrotechnics in Example 1, except that: the existing resin adhesive is used, and the specific formula and preparation process are as follows:

[0111] 2000g of waterborne polyurethane, 500g of butyl acrylate, 200g of water, and 20g of AMP-95 were mixed and mechanically stirred at a speed of 900r / min. After 50min, the existing resin adhesive was obtained.

[0112] Comparative Example 2

[0113] The structure of the neck safety protection module for small equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that: the modified resin adhesive used lacks poly(hexamethylene adipate), and the other components and steps are the same.

[0114] Comparative Example 3

[0115] The structure of the neck safety protection module for small equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that: the modified resin adhesive used lacks dibutyltin dilaurate, and the other components and steps are the same.

[0116] Comparative Example 4

[0117] The structure of the neck safety protection module for small equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that the modified resin adhesive used lacks 20% triethylamine ethylene glycol dispersion, and the other components and steps are the same.

[0118] Comparative Example 5

[0119] The structure of the neck safety protection module for small-equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that the modified resin adhesive used lacks 30% of the ethylene glycol dispersion of graphene oxide, and the other components and steps are the same.

[0120] Comparative Example 6

[0121] The structure of the neck safety protection module for small-equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that castor oil is missing from the modified resin adhesive used, and the other components and steps are the same.

[0122] Comparative Example 7

[0123] The structure of the neck safety protection module for small equivalent pyrotechnics in this comparative example is the same as that in Example 1, except that the modified resin adhesive used lacks dimethylsiloxane, and the other components and steps are the same.

[0124] The performance of the neck safety protection module for small equivalent pyrotechnics of the embodiment and comparative example was tested, and the test method and results are as follows.

[0125] Detection method:

[0126] 1. Interlayer force of aramid non-woven fabric:

[0127] Under normal temperature conditions, the aramid non-woven fabric was cut into L-shaped strips with an outer length of 10 cm, an inner length of 8 cm, and a width of 2 cm, and the interlayer force was tested by an electronic universal testing machine.

[0128] After being treated at high temperature of 55°C for 4 hours, the interlaminar force was tested again.

[0129] 2. Softness of protective layer:

[0130] 3. Explosion protection performance test:

[0131] The explosive is 20g TNT equivalent, and the explosive is 20cm away from the neck safety protection module; and the explosion protection test is carried out from four directions: front, back, left and right.

[0132] 4. According to GJB 4300-2012 "Standard for Safety Technical Performance Requirements of Military Bulletproof Vests", a 1.1g fragmentation ballistic limit V50 value test was conducted on a neck safety protection module for small-equivalent pyrotechnics.

[0133] 5. Aging performance test

[0134] Under the conditions of 50°C and 80% RH, the aramid non-woven fabric in the protective layer was subjected to a 72h ultraviolet aging performance test.

[0135] Table 1

[0136]

[0137]

[0138] Result analysis:

[0139] The neck safety protection modules for small equivalent explosives prepared in Examples 1 to 5 of the present invention have excellent bonding performance, strong stability, excellent weather resistance, and excellent protection performance. Specifically:

[0140] (1) Under normal temperature conditions, the interlayer force of aramid non-woven fabric is 32-35N. After being treated at high temperature of 55℃ for 4h, the interlayer force value has no obvious attenuation and stabilizes at 32-35N.

[0141] (2) The softness of the protective layer in the neck safety protection module for small equivalent pyrotechnics is 8.3N.

[0142] (3) The test results of explosion protection performance are as follows: there is no penetration of the protective layer, and the surface of the aramid non-woven fabric close to the explosive has no damage or cracking; there is no penetration, dent or damage in the buffer layer.

[0143] (4) The 1.1g fragmentation ballistic limit V50 value of the neck safety protection module for small-yield pyrotechnics was tested. The results showed that its 1.1g fragmentation ballistic limit V50 value was ≥110m / s.

[0144] (5) The aging performance test results are: the aramid non-woven fabric has no aging signs such as discoloration, blistering, and cracking. The interlayer force test of the aramid non-woven fabric after the UV aging test showed that the interlayer force value did not significantly decay and was stable at 32 to 35N. The aramid non-woven fabric was assembled into a neck safety protection module for small-equivalent pyrotechnics to conduct explosion protection performance tests and 1.1g fragment ballistic limit V50 value tests. Both tests were able to reach the test value range without UV aging tests, and the protection performance did not decay.

[0145] When the resin adhesive in the prior art is used in Comparative Example 1 of the present invention, the interlayer force of the aramid non-woven fabric is significantly reduced, wherein the high-temperature interlayer force is reduced to 26N, the softness is 14.2N, and the softness is reduced. In the explosion protection performance test, there is no penetration in the protective layer, wherein the surface of the aramid non-woven fabric close to the explosive has large damage and cracking; the buffer layer has depressions, no damage, and penetration, and the V50 value is 91m / s, and the explosion-proof performance is significantly reduced compared to the use of modified resin adhesives. In the aging test, the aramid non-woven fabric has signs of aging such as bubbling and cracking, the color is reduced, and the stability is greatly reduced.

[0146] When poly(hexanediol adipate) was missing from the modified resin adhesive of Comparative Example 2, the interlayer force of the aramid non-woven fabric decreased significantly, and the softness of the protective layer did not change significantly. In the explosion protection performance test, although the protective layer was not penetrated, the surface of the aramid non-woven fabric close to the explosive was damaged and cracked; the buffer layer was dented but not damaged, indicating that the explosion protection performance was reduced; the color was reduced in the aging test, indicating that the stability was reduced.

[0147] When the modified resin adhesive of Comparative Example 3 lacks dibutyltin dilaurate, the woven aramid non-woven fabric feels relatively rough, and its appearance is not as smooth and flat as the aramid non-woven fabric woven with the modified adhesive formula of Examples 1-5. The interlayer force of the aramid non-woven fabric did not change significantly, but the softness of the protective layer decreased significantly. In the explosion protection performance test, the protective layer was not penetrated, and the surface of the aramid non-woven fabric close to the explosive was not damaged or cracked; the buffer layer was not penetrated, dented, or damaged, indicating that the explosion protection performance did not change significantly; the aging test showed no significant changes.

[0148] When the modified resin adhesives of Comparative Examples 4 and 5 lack 20% triethylamine ethylene glycol dispersion and 30% graphene oxide ethylene glycol dispersion, the interlayer force of the aramid non-woven fabric is greatly reduced, and the softness of the protective layer has no obvious change. In the explosion protection performance test, although the protective layer has no penetration, the surface of the aramid non-woven fabric close to the explosive is damaged and cracked; the buffer layer has no penetration, depression, or damage, indicating that the explosion protection performance of the aramid non-woven fabric has decreased; there is no obvious change in the aging test.

[0149] When castor oil is missing from the modified resin adhesive of Comparative Example 6, the interlayer force of the aramid non-woven fabric decreases, and the softness of the protective layer also decreases. In the explosion protection performance test, although the protective layer is not penetrated, the surface of the aramid non-woven fabric close to the explosive is damaged and cracked; the buffer layer is not penetrated or damaged, and there is a slight depression, indicating that the explosion protection performance of the aramid non-woven fabric has decreased to a large extent; the color is reduced in the aging test, indicating that the stability is reduced.

[0150] When dimethylsiloxane is missing from the modified resin adhesive of Comparative Example 7, the interlayer force of the aramid non-woven fabric does not change significantly, and the softness of the protective layer does not change significantly. In the explosion protection performance test, there is no penetration of the protective layer, and the surface of the aramid non-woven fabric close to the explosive is not damaged or cracked; the buffer layer is not penetrated, dented, or damaged, indicating that the explosion protection performance has no significant change. However, in the aging test, the aramid non-woven fabric has aging signs such as blistering, cracking, and reduced color, indicating that the aging resistance and stability are greatly reduced.

[0151] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A neck safety protection module for small equivalent explosives, characterized in that: It includes a protective layer located on the outside and a buffer layer located on the inside. The protective layer is separately arranged, including a left protective module, a rear protective module and a right protective module. Each protective module is provided with a connecting structure, and the two can be detachably connected to each other to provide annular protection for the neck.

2. The neck safety protection module for small equivalent explosives according to claim 1 is characterized in that: The connecting structure is selected from one or a combination of Velcro or snap fasteners; Preferably, the connecting structure is Velcro.

3. The neck safety protection module for small equivalent explosives according to claim 2 is characterized in that: The parts of the left side protection module and the right side protection module close to the back neck are respectively bonded to the outer side of the back side protection module by Velcro; Preferably, the outer side of the rear protection module is provided with a Velcro fleece surface / hook surface, and the inner sides of the left protection module and the right protection module near the back of the neck are provided with a Velcro hook surface / fleece surface.

4. The neck safety protection module for small equivalent explosives according to claim 2 is characterized in that: The left side protection module and the right side protection module are bonded together at one end close to the throat by Velcro; Preferably, the outer side / inner side of the left protection module near the throat is provided with a Velcro hook surface / fleece surface, and the inner side / outer side of the right protection module near the throat is provided with a Velcro fleece surface / hook surface.

5. The neck safety protection module for small equivalent explosives according to any one of claims 1 to 4, characterized in that: The inner sides of the left side protection module, the rear side protection module and the right side protection module are all bonded to the outer side of the buffer layer by Velcro; Preferably, the entire outer side of the buffer layer is provided with a hook surface or a fleece surface of Velcro; Preferably, the entire inner side of the rear protection module is provided with a Velcro fur surface or a hook surface; Preferably, the buffer layer is provided as an integral whole.

6. The neck safety protection module for small equivalent explosives according to any one of claims 1 to 4, characterized in that: The material of the buffer layer is selected from one or more of EVA, EPE and ACF.

7. The neck safety protection module for small equivalent explosives according to any one of claims 1 to 4, characterized in that: Each protective module of the protective layer includes an outer layer and an inner layer; the inner layer material is aramid non-woven fabric; Preferably, the outer layer material is selected from Oxford cloth, nylon cloth, polyester cloth, and Cordura fabric.

8. The neck safety protection module for small equivalent explosives according to claim 7 is characterized in that: The inner layer material is an aramid non-woven fabric woven with a modified resin adhesive, and the mass fraction of the modified resin adhesive in the aramid non-woven fabric is 30%-40%; Preferably, the modified resin adhesive comprises the following components in parts by weight: 100 parts by weight of waterborne polyurethane 100 parts by weight of poly(hexanediol adipate) Dibutyltin dilaurate 10-15 parts by weight 10-12 parts by weight of organic amine compound alcohol dispersion 10-12 parts by weight of nanofiller alcohol dispersion Castor oil 6-8 parts by weight 3-5 parts by weight of dimethylsiloxane 1 to 3 parts by weight of fatty alcohol.

9. The neck safety protection module for small equivalent explosives according to claim 8, characterized in that: The organic amine compound alcohol dispersion is selected from one or more of triethylamine, diethylamine, and dimethylamine ethylene glycol dispersions; The nanofiller alcohol dispersion is selected from one or more of graphene oxide and ethylene glycol dispersion of carbon nanotubes; The fatty alcohol is selected from one or more of behenyl alcohol, stearyl alcohol and palmityl alcohol.

10. A modified resin adhesive, characterized in that: The composition comprises the following components in parts by weight: 100 parts by weight of waterborne polyurethane Poly(hexamethylene adipate) 100 parts by weight Dibutyltin dilaurate 10-15 parts by weight 10-12 parts by weight of organic amine compound alcohol dispersion 10-12 parts by weight of nanofiller alcohol dispersion Castor oil 6-8 parts by weight 3-5 parts by weight of dimethylsiloxane 1 to 3 parts by weight of fatty alcohol; Preferably, the organic amine compound alcohol dispersion is one or more selected from ethylene glycol dispersions of triethylamine, diethylamine, and dimethylamine; Preferably, the nanofiller alcohol dispersion is selected from one or more of graphene oxide and ethylene glycol dispersion of carbon nanotubes; Preferably, the fatty alcohol is selected from one or more of behenyl alcohol, stearyl alcohol and palmityl alcohol.

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