JP2016130617A - Burn-out container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burn-out container that can have a combustion performance, a combustion speed, a combustion time, etc., adjusted, can eliminate a sticking phenomenon without generating any negative differential pressure by varying combustibility and combustion gas pressure in the middle of a combustion process and thereby exhibiting predetermined combustibility in an arbitrary time, and making a burn-out without producing any combustion residues so that an existing firing explosive charging system can be diverted and existing facilities can be used.SOLUTION: A burn-out container 1 is characterized in that a cylindrical container body 20 which has one end closed and in which an explosive is charged, a lid 30 fitted to cover the other end thereof, and a cartridge 40 having an inner hole formed penetrating the one end and the center of the lid 30 are molded out of a laminate having a laminate structure having both sides of an intermediate layer covered with an outer layer and an inner layer having less combustibility than it, the outer layer being an outermost surface layer.SELECTED DRAWING: Figure 1

Description

  The present invention is used for loading a gun barrel into a gun chamber while containing a propellant or an igniting agent, etc., when a bullet is shot with a cannon or when an empty envelope is shot with a gun or training. This relates to a burnable container.

  When firing a shell like a cannon, a gunpowder filled with a gunpowder such as a gunpowder or igniter is loaded into a firearm barrel chamber, and a bullet is placed on it. Placed. When the gunpowder is ignited, it causes explosive combustion, and a bullet is fired by the combustion gas pressure. No bullets are used during air bombardment shooting, but it also causes explosive combustion and produces a bombardment sound.

  When firing bullets with such a charge, in order to stabilize the flight posture and improve the accuracy of hitting by giving the ball a turning motion, A barrel having a hollow line that is a spiral shallow groove on the inner peripheral surface is used. Revolved bullets injected and injected by the pressure of combustion gas generated by the combustion of propellants and burnable containers are rotated by encroaching the band into the cavity line and accelerating it in the cannon along with it. Movement is given and fired.

  If the pressure of the combustion gas is low when this bullet band is cut into the cavity line, the incision speed of the bullet band becomes non-uniform, and the bullet injection speed fluctuates with each shot, resulting in reduced accuracy. There are concerns. Also, the bullet velocity in the cannon increases immediately after the propellant is ignited, decelerates when the bullet band bites and cuts at the leading end of the cavity line, and again after the groove is cut into the bullet band. It fluctuates so as to accelerate. In particular, in the case of revolving bullets such as grenades, if the amount of propellant is reduced by short-range shooting, the combustion gas pressure is excessively reduced by the propellant, and therefore, the sticking phenomenon (stop) (Bullet phenomenon) occurs, and the bullet injection speed fluctuates greatly.

  In order to eliminate this sticking phenomenon, for example, Patent Document 1 discloses a launching device in which a propellant for stabilizing an initial speed, which is separated from a main propellant and has a gas generation speed faster than that of the main propellant, is arranged outside the ignition cartridge. Drugs are disclosed. This propellant increases the gas generation rate at the beginning of combustion by igniting the main propellant and the initial velocity stabilizing propellant at the same time and burning the initial velocity stabilizing propellant ahead of the main propellant. It is possible to stabilize the initial speed of the projectile, which is a bullet, and prevent sticking. However, it is intended to increase the combustion gas pressure immediately after ignition, and specifically does not increase the combustion gas pressure during the combustion process, specifically when the elastic band bites into the start of the cavity line and starts. Such fluctuations in the injection speed cannot be prevented. In addition, since two or more types of propellants having different flammability are used, the pressure in the chamber varies, and a negative differential pressure that easily causes distortion, deterioration, and breakage of the chamber is likely to occur.

  On the other hand, a burnout container that generates high combustion heat and combustion gas and bears a part of the energy of the propellant has been conventionally composed of a single composition, so that the combustibility such as combustion performance and combustion speed is constant. Difficult to change them from the middle of the combustion process. Moreover, since the amount of energy will change if the conventional composition is changed in order to change them, the influence will spread to the whole propellant charge. In addition, because of the influence of the composition change on the projectile charge system, it is necessary to make a major change in the design of existing systems and equipment, so the composition cannot be easily changed. In particular, if the combustibility of the burnable container is improved too much, a negative differential pressure is likely to be generated in the gun during shooting, so excessive improvement in combustibility is avoided. In addition, when an inert material is coated on the surface to suppress combustion, it can become a combustion residue, so the surface of the burnable container is provided with a coating member that changes flammability and combustion characteristics, and the combustion is uniformly controlled. It ’s difficult.

  Without such a composition change or the addition of a separate member, it is possible to divert the conventional propellant charge system and use it as it is, and it is possible to eliminate the sticking phenomenon without causing negative differential pressure. A container is desired.

Japanese Patent Application Laid-Open No. 2012-21685

  The present invention has been made to solve the above-mentioned problems, and can adjust combustion performance, combustion speed, combustion time, etc., and change combustion gas pressure by changing combustibility and combustion characteristics during the combustion process. By doing so, the sticking phenomenon can be eliminated without generating a negative differential pressure by demonstrating a predetermined combustibility at any time, burned out without generating a combustion residue, and diverting an existing projectile charge system And it aims at providing the burnout container which can utilize the existing equipment.

  In order to achieve the above-mentioned object, a burnable container is composed of a cylindrical container body that is closed at one end and filled with explosives, a lid that is fitted and closed at the other end, the one end and the lid. A barrel that forms a central hole penetrating the center is molded with a laminate having a laminated structure in which both sides of the intermediate layer are covered with a lower flammability outer layer and an inner layer, respectively, and the outer layer is the outermost surface layer It is characterized by that.

  In the burnout container, the inner layer is preferably the innermost surface layer.

  In the burnout container, the laminated body has a single layer structure composed of a layer that is more combustible than the inner layer, or the highly combustible layer and a layer that is less combustible than the inner layer. May have a multilayer structure in which are sequentially stacked.

  In the burnout container, the intermediate layer preferably contains at least one high-energy substance selected from explosives and explosives.

  In the burnout container, the intermediate layer has at most 0.5 parts by weight of the fiber component with respect to 1 part by weight of the nitrocellulose component, and the outer layer and / or the inner layer has at least a fiber component with respect to 1 part by weight of the nitrocellulose component. The weight ratio is preferably 1 part by weight.

  The combustible container of the present invention is formed of a laminate having a low flammability layer and a high flammability layer, and can adjust the combustion performance, the combustion speed and the combustion time, and ignites and burns. Since the combustibility can be changed and the combustion gas pressure can be changed during the period from the start to the exhaustion, the predetermined combustibility can be exhibited at an arbitrary time.

  This burn-out container has different combustion characteristics for each layer and can change the flammability during the combustion process. Therefore, the bullet band is cut into the leading end of the cavity line and cut into the bullet. The combustion gas pressure can be rapidly increased in accordance with the timing at which the speed is reduced. Therefore, the occurrence of the sticking phenomenon can be avoided. Further, since the bullet speed can be accelerated without decelerating, fluctuations in the bullet speed can be suppressed and fluctuations in the bullet injection speed can be prevented.

  At this time, since the outermost surface layer of the laminate forming the burnable container is a low combustibility layer, the fire is good, so that the flame gradually burns over the whole so that the pressure is uniformly applied in the medicine chamber. Since it can be burned, it can be burned and burned out without causing pressure deviation or negative differential pressure in the chamber. Furthermore, the combustibility of each layer of the laminate for molding the burnable container can be adjusted for each layer by changing the composition, blending ratio, thickness, density, and the like.

  In addition, the combustible container of the present invention is not significantly changed from the composition and manufacturing method of the combustible container that has been used so far, and can contribute to maintenance of productivity. Existing facilities can be used.

It is a schematic cross section at the time of use of the burnout container to which the present invention is applied. It is a partial schematic cross section of the container main body of the burnable container to which the present invention is applied. It is a partial schematic cross section of the lid of the burnout container to which the present invention is applied and a medicine cylinder. It is a partial schematic cross section of the container main body of another burnable container to which the present invention is applied. It is a partial schematic cross section of the container main body of another burnable container to which the present invention is applied.

  Hereinafter, although the form for implementing this invention is demonstrated in detail, the scope of the present invention is not limited to these forms.

  The burnout container of the present invention is formed by a laminate having a structure in which a low-flammability inner layer, a high-flammability intermediate layer, and a low-flammability outer layer are sequentially laminated. The outer layer is the outermost surface layer on the outside.

  An embodiment of the burnout container will be described in detail with reference to FIG. FIG. 1 is a schematic cross-sectional view showing a burnout container filled with explosives.

  The burnout container 1 has a cylindrical container body 20 that is closed at one end and filled with explosive 50, a lid 30 that fits and closes the other end of the container body 20, and the center of the container body 20 and the lid 30. It is comprised with the medicine cylinder 40 which has the inside hole which penetrates.

  One end of the container body 20 is closed except for an opening at a central portion that is connected to the medicine tube 40 to form an inner hole, and the other end is opened so that the lid 30 can be inserted and fitted. It is. The lid 30 that is fitted to the other end of the container body 20 has an opening that is connected to the medicine tube 40 at the center portion thereof to form a medium hole, and is fitted with one end of the container body of another burnout container. It has a concave shape so that it can be made. The medicine tube 40 has one end inserted and connected to the opening of the central portion of the container body 20, and the other end inserted and connected to the opening of the lid 30 to form a medium hole. Through this inner hole, propagation of combustion due to ignition at the time of shooting and blowout of flame occur.

  In the burnout container 1, these members are combined, and a region surrounded by the container body 20, the lid 30, and the medicine tube 40 is filled with the propellant 50. In each member of the container main body 20, the lid 30, and the medicine cylinder 40, the side facing the charged propellant 50 is defined as the inside, and the side facing the outside is defined as the outside. At this time, the surface in contact with the propellant 50 is the innermost surface 6 and the surface in contact with the outside air is the outermost surface 5.

  2 and 3 are schematic cross-sectional views of the container body 20, the lid 30, and the medicine barrel 40 at the downward portions of the respective members. FIG. 2 is a schematic cross-sectional view in which a part of the container body 20 is enlarged, and FIG. 3 is a schematic cross-sectional view in which a part of the lid 30 and the medicine barrel 40 are enlarged.

  As shown in FIG. 2, the container body 20 covers one surface on the outer side of the intermediate layer 2 with the outer layer 3 having lower combustibility and similarly covers the other surface on the inner side of the intermediate layer 2. It is molded by a laminate having a laminated structure that is covered with an inner layer 4 that has lower combustibility. The outer layer 3 is a layer having lower combustibility than the intermediate layer 2 and is located on the outer side of the intermediate layer 2 and is the outermost surface layer. The inner layer 4 is a layer having lower combustibility than the intermediate layer 2 and is located on the inner side of the intermediate layer 2 and is the innermost surface layer. The intermediate layer 2 is a layer having high flammability, and is sandwiched and covered by a low flammability outer layer 3 and a low flammability inner layer 4. The outer layer 3 and the inner layer 4 may be layers having lower combustibility than the intermediate layer 2, and may be equivalent combustibility or different combustibility.

  As shown in FIG. 3, each of the lid 30 and the medicine barrel 40 covers one surface on the outer side of the intermediate layer 2 with the outer layer 3 that is lower in combustibility, and the other one on the inner side of the intermediate layer 2. It is molded by a laminate having a laminated structure in which the surface is covered with an inner layer 4 having lower combustibility. The outer layer 3 is a layer having lower combustibility than the intermediate layer 2, and is located on the outer side of the intermediate layer 2 and becomes the outermost surface 5. The inner layer 4 is a layer having lower combustibility than the intermediate layer 2 and is located on the inner side of the intermediate layer 2 and is the innermost surface layer. The intermediate layer 2 is a layer having high flammability, and is sandwiched and covered by a low flammability outer layer 3 and a low flammability inner layer 4. The outer layer 3 and the inner layer 4 may be layers having lower combustibility than the intermediate layer 2, and may be equivalent combustibility or different combustibility.

  The propellant charge system in which the propellant 50 is sealed in the region partitioned by the container main body 20, the lid 30, and the cartridge 40 of the burnable container 1 of the present invention and the igniter 51 is sealed in the cartridge 40 is as follows. It is as follows.

  As shown in FIG. 1, by the ignition of the igniting agent 51 disposed in the inner hole of the medicine cylinder 40 that is an ignition medicine cylinder, the flame advances to the medicine cylinder 40 of the burnable container 1, and then the container body 20 and the point This leads to ignition / combustion of the propellant 50 surrounded by the gunpowder cylinder 40 and the lid 30. The propellant 50 is ignited by the flame of the igniting agent 51. The medicine tube 40 may have a plurality of holes (not shown). The container body 20 is ignited from the inside by the flame of the propellant 50 ignited by the igniting agent 51, and is ignited from the outside of the container body 20 by the flame that has advanced to the outside of the barrel 40 by the igniting agent 51. Combustion proceeds from the outside.

  At this time, since the outermost surface layer of the burnable container 1 is the low-flammability outer layer 3, the flame that has advanced to the outside ignites the outermost surface layer 5, and the flame gradually advances toward the inside over the entire surface. . At this time, the combustion speed is slow, the generation of combustion gas is suppressed, and the pressure of the combustion gas is also suppressed. At the same time, combustion also proceeds from the inside of the burnout container 1 with the combustion from the propellant 50 ignited from the ignition powder 51. Since the innermost surface layer of the combustible container 1 is the low combustible inner layer 4, similarly, the flame gradually proceeds toward the outside over the whole. At this time, the combustion speed is slow, the generation of combustion gas is suppressed, and the combustion gas pressure caused thereby is also suppressed.

  When the combustion of the outer layer 3 and the inner layer 4 progresses and reaches the intermediate layer 2, the combustion speed increases due to the high combustibility, and the generation of combustion gas increases, so that the combustion gas pressure rises rapidly. At this time, it is preferable that the combustion time to reach the intermediate layer 2 from the outer layer 3 and the combustion time to reach the intermediate layer 2 from the inner layer 4 are the same. Since a huge amount of combustion gas is generated by the combustion of the propellant 50 and the burnable container 1, a bullet (not shown) is ejected by the energy. The combustible container 1 burns from the inside and the outside, and burns out without generating a combustion residue after the combustion of the propellant is completed.

  In the laminate for molding such a combustible container 1, since the highly combustible layer is sandwiched between the low combustible layers, it is possible to increase the gas generation rate rapidly from the middle of the combustion process. In addition, by igniting and burning this highly combustible layer in the vicinity of a combustion process in which a sticking phenomenon may occur, the bullet can be accelerated and sticking can be prevented.

  The laminated body may be any layer as long as the outermost surface layer becomes the low-flammability outer layer 3, and the three layers of the low-flammability inner layer 4, the high-flammability intermediate layer 2, and the low-flammability outer layer 3 as described above. The structure is not limited to a structure in which layers are sequentially stacked, and another layer may be stacked.

  Specifically, as shown in FIG. 4, the container body 20 includes a laminated structure composed of the outer layer 3, the intermediate layer 2, and the inner layer 4, and higher combustibility than the inner layer 4 inside the laminated structure. The single-layer structure composed of the layers 7 may be formed by a laminate in which the outermost surface 5 and the innermost surface 6 are laminated in that order. In the case of such a four-layer structure, the innermost surface layer becomes the highly combustible layer 7 and the ignitability can be improved. Further, the combustion time for the combustion from the outside to reach the intermediate layer 2 from the outer layer 3 which is the outermost surface layer, and the combustion time for the combustion from the inside to advance from the highly combustible layer 7 to the inner layer 4 and reach the intermediate layer 2 are: It is preferable to adjust the burning rate and thickness of each layer so as to be the same. Combustion from inside and outside reaches the intermediate layer 2 at the same time, so that the combustion gas pressure can be rapidly increased and the bullet velocity can be accelerated in accordance with the timing at which the bullet velocity is reduced.

  Further, as shown in FIG. 5, the container body 20 includes a laminated structure including the outer layer 3, the intermediate layer 2, and the inner layer 4, and a highly combustible layer 7 having a higher combustibility than the inner layer 4 inside the laminated structure. A multilayer structure composed of a low flammability layer 8 having a lower flammability than the high flammability layer 7 is molded by a laminate in which the outermost surface 5 and the innermost surface 6 are laminated in that order. It may be. In the case of such a five-layer laminate, the innermost surface layer is the low flammability layer 8 and the innermost layer and the outermost layer are both low flammability, so that the fire around the whole becomes even. Get better. Further, since the low flammability layers and the high flammability layers are alternately stacked, the behavior in the chamber can be adjusted by changing the combustion characteristics according to the number of the layers. Combustion time for the combustion from the outside to reach the intermediate layer 2 from the outer layer 3 which is the outermost surface layer, and the intermediate layer by the combustion from the inner side proceeding from the low flammability layer 8 to the high flammability layer 7 and further to the inner layer 4 It is preferable to adjust the burning rate and thickness of each layer so that the burning time to reach 2 is the same.

  The burnout container 1 may be formed not only by the container body 20 but also by the lid 30 and the medicine barrel 40 being molded from the same type of laminate as the laminate shown in FIGS. 4 and 5. At this time, the lid 30 and the cartridge 40 are composed of a laminated structure consisting of the outer layer 3, the intermediate layer 2 and the inner layer 4, a highly combustible layer 7 having higher combustibility than the inner layer 4 inside the laminated structure, and a high height if necessary. A laminated body in which a single layer structure or a multilayer structure with a flammability low flammability layer 8 lower than the flammability layer 7 is laminated in that order from the outermost surface 5 to the innermost surface 6. It has been molded. By setting it as such a laminated body, the high combustion effect similar to the container main body 20 is acquired.

  Since the laminated body has a multilayer structure in which a plurality of layers having different flammability and combustion characteristics are laminated, it can be changed and adjusted a plurality of times. Although the example which increases a combustion gas pressure in the intermediate | middle layer 2 was shown, it is not restricted to this, For example, the highly combustible layer 7 may increase a combustion gas pressure. At this time, it is preferable that the combustion time reached from the inside and outside of the highly combustible layer capable of rapidly increasing the combustion gas pressure is the same.

  The low flammability or high flammability in each layer of the laminate indicates the level of flammability with respect to adjacent layers. A layer having a low combustion performance relative to the adjacent layer and a slow combustion rate is referred to as a low combustibility layer, and a layer having a high combustion performance and a high combustion speed relative to the adjacent layer is referred to as a high combustibility layer.

  Regarding the flammability of each of these layers, the composition such as the grade of nitrocellulose, the type of resin component, the type of fiber component, the change of the blending ratio by changing the component, the change of the layer thickness, the change of the layer density Can be adjusted.

  Each layer of the laminate is formed by papermaking, pressing and molding from a slurry containing a burnable material mainly composed of a nitrocellulose component and a fiber component.

  Nitrocellulose component, which is not in JIS standard, is defined by the Ministry of Defense (NDS) K-4013C (for nitrocellulose shells), which is standardized by each ministry regarding requirements and test methods. (Nitrogen content: 12.45-12.75%) or grade II (nitrogen content: 13.35 wt% or more) or grade III (nitrogen content: 13.10-13.30 wt%) is used. be able to.

  Examples of the fiber component include natural fibers and synthetic fibers, such as chemical pulp such as kraft pulp; fibers made of cellulose such as cellulose acetate, cellulose acetate propionate, cellulose acetate butyl, and ethyl cellulose; refined cellulose fibers; Examples include fibers derived from at least one of herbaceous plants, shrub plants, and oak plants; waste paper; acrylic fibers. A fiber component may consist of one of these, or may include a plurality of types.

  The refined cellulose fiber has an aspect ratio (average fiber length / average fiber diameter) of 10 or more obtained by dividing the average fiber length by the average fiber diameter while keeping the average fiber diameter at most 1.5 μm. Preferably, the average fiber diameter is 4 nm to 1.5 μm, the average fiber length is 40 nm to 1000 μm, and the aspect ratio is 10 to 1000.

  This fine cellulose fiber is made of wood, non-wood, pulp made from wood and non-wood, natural fibers such as cotton and hemp, plants such as dietary fiber derived from grains and fruits, seaweed valonia, and chordal animals. It can be obtained from any raw material selected from squirts and / or bacteria that produce cellulose.

  The refined cellulose fiber is not limited to its production method or defibration method, and a known method can be used, and chemical defibration, physical defibration based on the raw materials, or a complex defibration combining these. It can be obtained with fiber. For example, it is a generally known method, and is obtained by a method in which cellulose is defibrated or refined by grinding or beating using a refiner, a high-pressure homogenizer, a medium stirring mill, a stone mill, a grinder, or the like. be able to. As chemical defibration, for example, it is described in JP2009-243014A, and the oxidized cellulose is defibrated by oxidizing the cellulose raw material washed after acid treatment with an N-oxyl compound. And a method of forming nanofibers. Examples of physical defibration are described in JP-A-2008-024788, and include a method of producing a nanofiber precursor by mechanically defibration. The complex fibrillation is described in, for example, Japanese Patent Application Laid-Open No. 2009-263651, and oxidizes powdered cellulose using an oxidizing agent in the presence of an N-oxyl compound and bromide, iodide or a mixture thereof. In addition, a method of forming nanofibers by wet atomization treatment with pressure using an ultrahigh pressure homogenizer can be used. Moreover, the micronized cellulose fiber may be a commercially available product.

  The finely divided cellulose fiber may have an average fiber diameter of 1.5 μm or less and an aspect ratio of 10 or more. For example, cellulose nanofiber, fine cellulose fiber, cellulose nanofiber, microfibrillated cellulose, fine cellulose, cellulose It may be referred to as fiber, fine cellulose fiber, or fine fibrous cellulose.

  Specifically, as a refined cellulose fiber, serish: KY-100G, KY-100S, FD-100F, FD-100G, FD-100S, FD-100M, FD-200L, PC-110S (all are Daicel Finechem Co., Ltd.) Product name).

  The fiber component preferably contains 0.1 to 100 parts by weight of fine cellulose fiber in 100 parts by weight of the fiber component.

  By containing refined cellulose fibers in the fiber component, the strength of the burnable container can be improved without impairing the combustibility and burnout. Since the specific surface area of the refined cellulose fiber contained in the burnout material is extremely larger than that of the pulp fiber, hydrogen bonds between the fibers at the time of dry molding become extremely large, and the strength can be greatly improved. In addition, the refined cellulose fiber has less structural defects that appear in the fiber itself than the pulp fiber, which is a natural material, and thus affects the strength improvement. Since the refined cellulose fiber is mainly composed of the same material constituting the natural fiber, the combustibility and burnout of this burnout container is almost the same as that of the burnout container containing pulp fiber without containing the refined cellulose fiber. It becomes equivalent.

  Moreover, since the thermal expansion coefficient of the refined cellulose fiber is as low as that of quartz glass, the dimensional stability with respect to temperature can be improved. Furthermore, compared with pulp fibers, finely divided cellulose fibers in a dry state strongly aggregate together and form a denser structure, so that the resistance to dimensional stability against moisture is also improved. Therefore, the dimensional stability with respect to the humidity of the burnout container can also be improved.

  Furthermore, when a slurry containing a burnable material is used, a slurry containing only pulp fibers that cannot be kept at a uniform concentration due to precipitation of solids in the slurry unless the tank is constantly stirred. The slurry containing finely divided cellulose fibers can easily continue to uniformly disperse the slurry in the tank without much stirring power. For this reason, manufacturing stability can be improved by the improvement of the dispersibility of a raw material slurry. This is considered to be due to the fact that the finely divided cellulose fiber has extremely high dispersibility in water, and contributes to the production stability of the burnout container.

  When a synthetic resin and a stabilizer, which are raw materials other than the refined cellulose fiber, are included as a burnout material, the synthetic resin and the stabilizer are fixed and collected on the fiber, respectively. Since the specific surface area of the refined cellulose fiber is extremely large, the fixing rate of the synthetic resin is improved, and the finer cellulose fiber has a denser structure between the fibers, so that the collection rate of the stabilizer is also improved. Compared with a burnable material that does not contain finely divided cellulose fibers and uses pulp fibers as a fiber component, the loss of raw material slurry during the production can be reduced, and the yield of burnable containers can be improved. .

  As herbaceous plants, for example, kenaf, Asa, flax, Abaca, bamboo, cotton, rice, wheat, sweet pepper, and jute can be mentioned.

  Examples of shrub plants include kouzo, mitsumata, and ganpi.

  Examples of the oak plant include conifers and hardwoods which are pulp logs.

  Among herbaceous plants, Kenaf is a mallow family, Asa is a hempaceae plant also called hemp, Ama is a flax family plant also called flax, and Abaca is a banana family plant also called manila hemp. The tissue containing the fiber is also collected from the bast portion of the stem. Bamboo is a gramineous plant also called bamboo, and a tissue containing fibers is collected from a dried hollow woody stem. Cotton is a mallow that is also called cotton. Tissues containing fibers are collected from cotton. Rice is a plant belonging to the genus Gramineae, and wheat is a gramineous plant such as wheat, barley, rye, and buckwheat. The stem is dried, and the straw, which is a fiber-containing tissue, is collected. A bamboo shoot is a plant of the family Papaveraceae, and a tissue containing fibers is collected from a pseudostem / leaf sheath. Jute is a lindenaceae plant also called burlap, Indian hemp, or leopard, and a tissue containing fiber is collected from the bast.

  Among the shrub plants, mulberry is a mulberry shrub plant also called moth, mitsumata is a gentian shrub plant also called trigonum, and Gumpi is a gentian shrub plant also called scabbard. Tissue containing is collected.

  The oak plant may be a conifer or a hardwood, but is preferably a raw material for kraft pulp. The obtained fiber may be an unbleached product or an unbleached product, and is preferably an unbleached product.

  Examples of the used paper include corrugated used paper, newspaper used paper, and cut paper, and are made into paper after being processed into a fiber and processed as necessary to remove ink.

  The acrylic fiber is preferably a fiber made of a synthetic polymer mainly composed of acrylonitrile.

  Tissues collected from plants or recovered from waste paper are dried, then torn or unwound, cut as necessary, or chemically pulped, and acrylic fibers are cut appropriately. After that, the fibers have an average diameter of 5 to 40 μm and an average length of 0.5 to 21 mm. You may degrease like absorbent cotton. In particular, a pulp derived from such a plant has a hydroxyl group and is compatible with nitrocellulose having a hydroxyl group. Therefore, even if these are mixed, the familiarity with each other is good, and since the hydroxyl groups are dehydrated and bonded during drying, the molded product can have strong strength. On the other hand, chemical fibers that do not have a hydroxyl group do not conform to nitrocellulose, do not undergo dehydration bonding during drying, and cannot be expected to have strength.

  The burnout material may contain general-purpose additives such as a resin component, a stabilizer, and a fixing agent as necessary in addition to the main component.

  The resin component is a binder resin, and examples thereof include synthetic resins such as emulsion polymerization styrene butadiene rubber and solution polymerization styrene butadiene rubber.

Examples of the stabilizer include ethyl central (ECL), acardite (AKII), diphemylamine (DPA), 2-nitrodimenylamine (2NO ₂ DPA), phenolic antioxidants ADK STAB AO-80, and AO—. 50 (all manufactured by Asahi Denka Kogyo Co., Ltd .; trade name), 2,6-di-t-butyl-4-methylphenol (BHT), hydroquinone (HQ), and the like.

  Examples of the fixing agent include an inorganic flocculant such as a sulfuric acid band and an organic flocculant such as a polymer flocculant.

  The content of each component of the burnout material may be 9 to 70% by weight of the fiber component and 20 to 90% by weight of the nitrocellulose component, 15 to 50% by weight of the fiber component and 45 to 45% of the nitrocellulose component, respectively. It may be 82% by weight. Moreover, when the burnout material contains an additive, the content may be 0 to 10% by weight. For example, it is preferable that the binder resin, the stabilizer, and the fixing agent, which are resin components, be (6-12) :( 0.5-2.0) :( 0.1-1.0) by weight ratio.

  A low flammability layer such as the outer layer 3 and the inner layer 4 can reduce the flammability as much as possible, and can reduce the flammability by providing a thickness. In the low combustibility layer, the weight ratio of the fiber component to 1 part by weight of the nitrocellulose component is preferably 0.5 parts by weight or more. The thickness of the low flammability layer is preferably 0.1 to 1.5 mm. The density of the low flammability layer is preferably 0.5 to 1.5 g / cc.

  A highly combustible layer such as the intermediate layer 2 can select a desired combustibility according to a desired gas generation rate and a total amount of combustion gas. In the highly combustible layer, the weight ratio of the fiber component to 1 part by weight of the nitrocellulose component is preferably less than 1 part by weight, and more preferably 0.5 parts by weight or less. The thickness of the highly combustible layer is preferably 0.1 to 1.5 mm. The density of the highly combustible layer is preferably 0.5 to 1.5 g / cc.

  The highly combustible layer such as the intermediate layer 2 may contain a high-energy substance such as explosive or explosive as necessary.

  The example in which the burnout container 1 is formed by combining the respective members has been shown. However, the lid 30 and the medicine cylinder 40 are integrally formed, or the container body 20 and the medicine cylinder 40 are integrally formed. A part of such a member may be integrally formed. Moreover, the shape of the burnout container 1 is not limited to this, A well-known shape can be used.

  As a manufacturing method of the burnout container 1, after preparing each slurry containing a burnout material suitable for the combustion characteristics of each layer, continuously making them in any order, and pressing to form a laminate The burnable container 1 can be obtained by molding into an arbitrary shape.

  Examples of the present invention will be described in detail below, but the scope of the present invention is not limited to these examples.

(Production example)
As a burnout material, nitrocellulose (NC), kraft pulp (KP), resin components, stabilizers, fixing agents are used, and the composition ratio (% by weight) shown in Tables 1 and 2 below is the laminated structure of the present invention An incinerated container and a single-layered combustible container were fabricated. Nitrocellulose used was NDS-K-4013C grade I or grade II, which is also used in conventional products. As a manufacturing method, a method described in JP-A-01-188484 is diverted to prepare a slurry mixed with a combustible material, and a combustible container is obtained by paper-making and pressing continuously several times. It was. The thickness of the stackable combustible container (Example 1) of Example 1 is 3 mm, the outer layer and the inner layer are 0.75 mm, the intermediate layer is 1.5 mm, and the outer layer: intermediate layer: inner layer = 1: 2. : 1. The thickness of each of the burnout containers having a single-layer structure as Comparative Examples 1 to 3 was 3 mm.

(Sealed bomb test)
The combustion characteristic evaluation in the combustible container of Example 1 and Comparative Examples 1 to 3 was made. A non-combustible material was applied to the side surfaces of these samples so that they were burned from both end surfaces that contact the outer and inner surfaces. A 20 g sample was put into a 100 cc bomb to obtain a loading density of 0.2 g / cm ³ , a hermetic bomb test was performed, and changes in combustion gas pressure over time were measured to obtain analysis results. As a result, the maximum pressure value and the time are shown in Table 3. Further, the combustion characteristic evaluation is represented by a slope of a straight line connecting 20% to 80% of the maximum pressure as a pressure increase rate, and the result is shown in Table 4.

  According to the measurement results, the combustible container 1 of Example 1 has low combustibility because the low-flammability outer layer 3 and inner layer 4 burn in the early stage of combustion, and the pressure is low because of less generation of combustion gas. In this case, the intermediate layer 2 having high flammability burned to improve the flammability and generate a large amount of combustion gas, resulting in a rapid increase in pressure. Thereby, it was confirmed that the combustion characteristics can be changed in the middle of the combustion process to change the combustibility. Further, the combustible container 1 of Example 1 has a single layer structure and the combustion rate at the initial stage of combustion is slower than the combustible container of Comparative Example 1 which is a conventional product, so that the pressure rise is slow, and the highly combustible intermediate layer It became clear that in the middle period of combustion reaching 2, the combustion rate was accelerated by the change in combustibility, the pressure increased rapidly, and the sticking phenomenon could be solved.

  Furthermore, Comparative Example 2 is the same as the intermediate layer 2 of Example 1, and Comparative Example 3 is the same as the outer layer 3 and the inner layer 4 of Example 1, and therefore, according to the measurement results, their combustion characteristics are determined. Because the timing at which the pressure suddenly rises and the pressure rise rate are different, by adjusting the composition and thickness of each layer, the timing at which the pressure rises and the pressure rise rate can be adjusted. It became clear that a predetermined flammability can be exhibited over time.

  The burnable container of the present invention is useful as a container that is loaded into a gun barrel chamber while containing a propellant, an ignition agent, and the like during shell shooting, ceremonial or training empty package shooting.

  1 is a burnout container, 2 is an intermediate layer, 3 is an outer layer, 4 is an inner layer, 5 is an outermost surface, 6 is an innermost surface, 7 is a highly combustible layer, 8 is a low combustible layer, and 20 is a container The main body, 30 is a lid, 40 is a cartridge, 50 is a propellant, and 51 is an ignition agent.

Claims (5)

  An intermediate layer includes a cylindrical container body that is closed at one end and filled with explosives, a lid that is fitted and closed at the other end, and a medicine cylinder that forms an inner hole penetrating the one end and the center of the lid. A combustible container, wherein the outer layer is an outermost surface layer, wherein the outer layer is an outermost surface layer.   The burnout container according to claim 1, wherein the inner layer is an innermost surface layer.   The laminated body is a single layer structure composed of a layer that is more combustible than the inner layer, or a multilayer in which the highly combustible layer and a layer that is less combustible are sequentially laminated inside the laminated structure. The burnable container according to claim 1, which has a structure.   The burnout container according to claim 1, wherein the intermediate layer contains at least one high-energy substance selected from explosives and explosives.   The intermediate layer has a fiber component at most 0.5 parts by weight with respect to 1 part by weight of the nitrocellulose component, and the outer layer and / or the inner layer has a weight ratio of at least 1 part by weight of the fiber component to 1 part by weight of the nitrocellulose component. The burnout container according to claim 1, wherein:

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