Stab ilchodach boga-éadaí frithsheasmhacha le snáithíní ardfheidhmíochta

In today's world, in the context of peace and development, local wars have never stopped and terrorist attacks have occurred from time to time. Therefore, the research and development of military and police protective equipment has always attracted much attention. For my country, based on the country's strict control of guns and ammunition, the threats faced by front-line police mainly come from piercing, beating, hacking, etc. of the human body by sharp objects such as daggers and knives. According to statistics from China Police Network, since the founding of New China, more than 14,000 police officers from public security organs across the country have died heroically, and more than 100,000 police officers have been injured. According to statistics in the first half of 2020, a total of 169 police officers were killed in the line of duty. Most police deaths and injuries are related to killing instruments such as daggers and bayonets. How to effectively defend against the physical attacks of these melee weapons? Ensuring the personal safety of police officers has always been an important subject in police equipment research.

Is cineál trealaimh é éadaí cosanta stab a fhéadfaidh airm ghéar agus airm ghéar a chosc go héifeachtach ó ionsaí a dhéanamh ar na codanna cosanta ó uillinneacha éagsúla agus an bhagairt ó chréachta stab do chodanna cosanta an chorp daonna a laghdú. Tar éis blianta taighde agus forbartha, d'fhorbair éadaí frithsheasmhacha de réir a chéile ó éadaí frithsheasmhacha crua go dtí éadaí frithsheasmhacha boga, ag cur san áireamh feidhmíocht caitheamh agus inoiriúnaitheacht comhshaoil. Ní hamháin go gcomhlíonfaidh na héadaí frithsheasmhacha stab atá déanta as ábhair nua snáithíní ardfheidhmíochta na ceanglais maidir le feidhmíocht chosanta, ach tá feidhmíocht chaitheamh níos fearr acu freisin maidir le cáilíocht, tiús agus bogas iomlán. Mionsonróidh an t-alt seo an cineál éadaí frithsheasmhacha boga seo.

Ar an dara dul síos, stádas forbartha éadaí resistant stab

According to the properties of the material, stab-resistant clothing can be divided into metal stab-resistant clothing and non-metal stab-resistant clothing. The core stab-resistant material of metal stab-resistant clothing is metal, and it also includes composite materials of metal and other non-metal stab-resistant materials. The original metal stab-resistant clothing mostly uses steel, iron and other metals or alloys as load-bearing materials, and is made into scales, circles, squares, etc. to bond with textile fabrics, or complete metal sheets are placed in textile fabrics as load-bearing materials. a Substrate Makes up the stab-resistant garment. This metal stab-proof suit is a hard stab-proof suit with good stab-proof performance, but high hardness and quality, poor air permeability, and is not conducive to trunk movement when worn. To improve the softness of stab-resistant clothing, researchers have developed half-hard, half-soft metal stab-resistant clothing. This type of stab-resistant clothing reduces the quality and hardness of the material to a certain extent through the combination of metal materials and resins. Can not meet the industry's requirements for light, thin and soft. The non-metallic stab-resistant clothing made of high-performance fiber materials is a kind of soft stab-resistant clothing, which can meet the above requirements of lightness, thinness and softness, and is also a current research hotspot. The core protective material of this stab-resistant suit is mainly high-performance fibers. At present, the market is represented by ultra-high molecular weight polyethylene and aramid. The fabric and resin are combined as a stab-proof layer, and the multi-layer composite has good stab-proof performance, flexible wearing, and does not affect human activities. Compared with metal stab-resistant clothing, the performance of non-metal stab-resistant clothing is less affected by changes in the external environment. It has stable performance and higher applicability in the combat environment of -20 degree -55 degree . The performance of non-metal stab-resistant clothing is less affected by changes in the external environment. It has stable performance and higher applicability in the combat environment of -20 degree -55 degree . The performance of non-metal stab-resistant clothing is less affected by changes in the external environment. It has stable performance and higher applicability in the combat environment of -20 degree -55 degree .

3. Ceanglais theicniúla maidir le héadaí cosanta ó na póilíní i mo thír

The following is a comprehensive introduction to the requirements for stab-resistant clothing based on the GA 68-2019 "Police stab-resistant clothing" standard.

3.1 Comhdhéanamh -éadaí frithsheasmhacha stab

Is éard atá in éadaí cosanta stab na bpóilíní ná seaicéad stab, ciseal cosanta stab, agus clúdach cosanta ciseal cosanta stab.

3.2 Riachtanais chuma

Ba cheart go mbeadh an seaicéad resistant stab saor ó lochtanna ar nós briste, línte ar snámh agus snáthaidí in easnamh. Níl aon lochtanna ar dhromchla an ábhair chiseal resistant stab, mar shampla damáiste, claiseanna domhain, scratches, scoilteanna, burrs, etc. Ba chóir ábhair mhiotail a chóireáil le cóireáil frith-meirge, agus neamh{{{{{). 3}}Ba chóir go mbeadh ábhair mhiotail réidh. Ba cheart go mbeadh an ciseal céanna d'ábhar frith-stobáin aonfhoirmeach, cothrom, agus saor ó lochtanna ar nós seachráin agus fillteacha áitiúla. Beidh na sonraíochtaí agus na toisí céanna ag sraitheanna frithsheasmhacha atá comhdhéanta de shraitheanna iolracha d'ábhar frithsheasmhach.

3.3 Cáilíocht, dath agus riachtanais limistéir chosanta

The mass of type A stab{{0}}proof clothing is less than or equal to 2.8kg, and the mass of type B stab-proof clothing is less than or equal to 1.0kg. Controlling the quality of the product can ensure that the wearer's movements and tactical movements will not be affected when wearing it. The color of the stab-proof clothing jacket should be navy blue, and the protective area of the stab-proof layer should be greater than or equal to 0.25m2.

3.4 Riachtanais frith-stobáin

Grade A stab{{0}}proof clothing uses a D1 knife, and the test body uses an impact energy of 24J±0.5J to pierce the stab-proof clothing. Under effective puncture conditions, the puncture-resistant clothing does not penetrate; the B-type stab-resistant clothing uses D2 and D3 tools respectively, and the test body pierces the stab-resistant clothing with an impact energy of 24J±0.5J. In the case of effective puncture, the anti-puncture garment does not penetrate.

3.5 Friotaíocht uisce agus inoiriúnaitheacht teochta

Ag teocht an tseomra, tar éis an éadaí resistant stab a thumadh in uisce ar feadh 30 nóiméad, nó ag teocht chomhthimpeallach -20 céim go 55 céim , comhlíonann an fheidhmíocht stab-resistant na ceanglais.

4. Éadaí frithsheasmhacha boga nua

The mechanisms of stab and bullet resistance are different. Bulletproof is mainly to prevent bullet damage to the material. The impact kinetic energy of the bullet disperses the kinetic energy to the bulletproof material, which diffuses and absorbs at the moment of contact with the bulletproof material. For matter, the way of destruction is isotropic. Stab prevention is mainly based on the principle of frictional self-locking. As the knife pierces the inside of the stab-proof suit with a certain kinetic energy, the fiber yarn part of the inner structure of the stab-proof suit is cut and shrunk, so that the knife is clamped by the yarn. The yarn is constantly stretched, and its frictional resistance to the knife prevents the knife from continuing to pierce. At this time, the state reached by the deformation of the fabric becomes the "locked" state. During the puncture process, the damage to the material by the tool is mainly shear damage and tensile damage. Therefore, the higher the strength of the fiber, the more fibers that can be sheared, and the denser the yarn structure in the fabric structure, the more shearing force the stab-resistant clothing can withstand, and the easier the yarn is in a self-locking state, the easier it is to prevent The stab-proof performance of the stab suit is better.

Is minic a úsáidtear snáithíní poileitiléin ardmheáchan móilíneach agus snáithíní araimíde chun an croíchiseal cosanta d'éadaí frithsheasmhacha a ullmhú mar gheall ar a ard-neart agus a modulus, agus tá go leor ag gach ceann acu. airíonna den scoth. Is iad snáithíní UHMWPE na snáithíní is láidre ar domhan. Tá sé níos lú dlúth ná uisce agus tá ábhar solúbtha slabhra mhóilíneach aige. Is ábhar iontach é chun éadaí frithsheasmhacha éadroma agus boga a dhéanamh. Mar gheall ar a leáphointe íseal, áfach, laghdófar feidhmíocht an tsnáithín go mór ag teocht ard, rud a chuireann teorainn lena chur i bhfeidhm i roinnt timpeallachtaí speisialta. Tá neart, modulus agus fadú snáithíní araimíde ag briseadh níos ísle ná iad siúd a bhaineann le snáithíní poileitiléin ard-mheáchan móilíneach, ach tá friotaíocht maith teochta acu agus is féidir iad a úsáid i roinnt coinníollacha teocht ard. Trí na buntáistí a bhaineann leis an dá cheann a chomhcheangal, is treocht nua i bhforbairt stab é ullmhú cineálacha éagsúla éadaí ilchodach bog-resistant déanta as snáithín UHMWPE agus snáithín aramid (mar a léirítear i bhFíoracha 1 agus 2). {8}}éadaí frithsheasmhacha. Éadaí durable. Ar bhonn na feidhmíochta cruthúnas stab a shásamh, tá tréithe Gile, tanaí agus bog ag an éadaí resistant stab. Déantar cur síos thíos ar mhodhanna ullmhúcháin agus tástála feidhmíochta den chineál seo éadaí frithsheasmhacha. Ar bhonn na feidhmíochta cruthúnas stab a shásamh, tá tréithe Gile, tanaí agus bog ag an éadaí resistant stab. Déantar cur síos thíos ar mhodhanna ullmhúcháin agus tástála feidhmíochta den chineál seo éadaí frithsheasmhacha. Ar bhonn na feidhmíochta cruthúnas stab a shásamh, tá tréithe Gile, tanaí agus bog ag an éadaí resistant stab. Déantar cur síos thíos ar mhodhanna ullmhúcháin agus tástála feidhmíochta den chineál seo éadaí frithsheasmhacha.

4.1 Próiseas ullmhúcháin éadaí frithsheasmhacha a shá-

4.1.1 Snáithíní poileitiléin ultra-ardmheáchan móilíneach a ullmhú

Ag baint úsáide as roisín poileitiléin ultra-ardmheáchan móilíneach mar bhunábhar agus ola bhán tí mar an tuaslagóir, ullmhaítear an tuaslagán stoic sníomh trí at agus tuaslagadh sa chiteal tríd an bpróiseas socraithe, agus corraítear é ina chúpla comhthreomhar- {1}}scriú chun easbhrúiteoir leá aonfhoirmeach a dhéanamh agus aistrítear é chuig an spinneret Déantar an ceann a spraeáil amach, agus faightear na filiméid collagen reoite tríd an bpróiseas múnlaithe sníomh glóthach. Baintear amach agus síntear na filiméid cholangéine reoite i gcéimeanna éagsúla, agus sa deireadh faightear snáithíní poileitiléin ard-neart agus ard-modulus.

4.1.2 Sliseanna frithsheasmhacha a stab a ullmhú

Scaiptear na snáithíní poileitiléin mhodúil ard-neart agus ard ullmhaithe go cothrom le meaisín leagain, iad líonta le meaisín tuilte speisialta agus iad a leigheas go tapa, agus ansin déantar an t-ábhar cisealach a fhaightear a thrasnú go leanúnach. -nasctha agus níos measa ag 0 céim , 90 céim , 45 céim , agus 135 céim . Fuarthas an fabraic ultra-stáb poileitiléin ardmheáchan móilíneach-neamhfhite-resistant. Déantar an fabraic fhite aramid a líonadh agus a leigheas go tapa tríd an meaisín tumtha céanna chun na bearnaí idir na struchtúir snáithíní fabraice fite a líonadh.

4.1.3 Éadaí atá frithsheasmhach in aghaidh stab a ullmhú

Déantar fabraic fhite neamhfhite UHMWPE (dlús ciseal singil 150g/m2) agus fabraic fhite aramid (dlús sraithe singil 400g/m2) a ghearradh agus a lannú de réir na gceanglas bunaithe ar mhéid agus ar cháilíocht an phróisis. , agus cruachta agus comhcheangailte in ord, déantar iad a shéalú i dtarrailín speisialta frithstatach hidreastatach chun sliseanna resistant heirméiteach séalaithe a chruthú. Cuir na sceallóga frithsheasmhacha isteach sa seaicéad éadaí frithsheasmhach in ord tosaigh agus ar chúl chun na héadaí stab a dhéanamh.

4.2 Tástáil feidhmíochta in aghaidh-stab

4.2.1 Modh tástála

The dynamic puncture experiment was designed in accordance with the Ministry of Public Security's GA 68-2019 "Police Stab-Proof Clothing" standard, using a drop-weight testing machine and standard cutting tools (as shown in Figures 3 and 4). The experimental steps are as follows:

1) Pacáiste an sliseanna frith- puncture, marcáil na pointí puncture ar an dromchla, nach bhfuil an fad idir gach pointe puncture níos lú ná 50mm, agus ní mór an t-achar ó imeall an sliseanna puncture a bheith níos mó ná 50mm freisin;

2) Déan an t-ábhar bonn a shocrú de réir na gceanglas caighdeánach, agus tástáil a dhéanamh ar ráta rebound an bhunábhair;

3) Déan an gléas leictreonach a réamhthéamh go léamh cobhsaí, agus ansin socraigh an tslis fhrith-stab ar an ábhar tacaíochta;

4) Déan an uirlis nua neamhúsáidte a shocrú ar an gcorp titim agus é a cheangal leis an tástálaí meáchain titim;

5) Ailínigh barr an lann puncture le pointe puncture an tslis puncture frith-, cas ar an gcnaipe titim meáchain suas, ardaigh an meáchan titim go dtí airde áirithe, agus cinntigh go bhfuil an comhlacht titim agus an scian fuinneamh cinéiteach 24J a bheith acu le chéile;

6) Cas ar an gcnaipe titim, beidh an scian agus an comhlacht ag titim le chéile chun an chéad puncture a chríochnú;

7) Cuir an pointe treá in ionad, déan an tástáil arís, agus déan tástáil pointí eile.

4.2.2 Torthaí tástála

I go leor tástálacha turgnamhacha ar scéimeanna éagsúla, fuarthas amach nuair a dhéantar an fabraic neamhfhite UHMWPE agus an fabraic fhite aramid a chomhdhlúthú i gcomhréir áirithe, is féidir a chinntiú go gcomhlíonfaidh an fheidhmíocht cruthúnas stab an caighdeánach, agus tá cáilíocht fhoriomlán stab-resistant d’éadaí (arna thástáil le cothromaíocht leictreonach), is féidir tiús (Tástáil le tomhas tiús iarmhéid leictreonach) agus bog (arna thástáil le tástálaí bog) a choinneáil ag a leibhéal maith. Tá na torthaí tástála léirithe i dTábla 1.

  5 Conclusion

With the advancement of science and technology and the improvement of people's safety awareness, stab-resistant clothing, as an important protective equipment, has been more and more widely used. From the military, police, and security to flight attendants and duty officers, it's not uncommon for stab-resistant suits to be worn. At the same time, in order to cope with the complex environment, the requirements for the wearing performance of stab-resistant clothing are also constantly improving. Lightweight, lightweight, soft, and comfortable to wear stab-resistant clothing has become a mainstream product, occupying a major market.