JP2011030800A - Fire extinguisher and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire extinguisher capable of keeping required pressure resistance and impact resistance over a long period of time by covering a thermoplastic resin layer configuring a pressure resistant container by a vapor deposition layer containing a metal oxide and surely preventing degradation due to the weatherability of the thermoplastic resin layer configuring the pressure resistant container, and a method of manufacturing the same. <P>SOLUTION: The fire extinguisher includes the pressure resistant container to be filled up with a fire extinguishing agent. The pressure resistant container 2 is formed of a pressure resistant thermoplastic resin and has the vapor deposition layer 4 containing the metal oxide on the outer surface. A body layer 3 of the pressure resistant container 2 is formed of modified polyphenylene ether. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a fire extinguisher including a pressure-resistant container filled with a fire extinguisher and a method for manufacturing the fire extinguisher.

  In a fire extinguisher that contains fire extinguishing powder, water, high-pressure gas, etc., a technique for blow-molding a fire extinguisher made of a thermoplastic resin that is lighter than a current metal container and a pressure resistant container made of the thermoplastic resin is progressing. The pressure-resistant container made of thermoplastic resin is described in, for example, Japanese Patent Application Laid-Open No. 2004-196926 (Patent Document 1).

  However, pressure-resistant containers are said to have sufficient pressure strength and gas barrier properties, but in a fire extinguisher, they are installed outdoors and exposed to direct sunlight or indirect light for a long period of time. In many cases, the pressure resistance and impact resistance decrease due to aging deterioration of the resin constituting the container. Accordingly, techniques for reinforcing the pressure resistance of the container are described in Japanese Utility Model Laid-Open No. 60-182069 (Patent Document 2) and Japanese Utility Model Publication No. 6-20546 (Patent Document 3).

JP 2004-196926 A Japanese Utility Model Publication No. 60-182069 Japanese Utility Model Publication No. 6-20546

  By the way, in the pressure-resistant container of the fire extinguisher described in Patent Document 2 or Patent Document 3, the outer periphery of the container is provided with reinforcing means, but deterioration due to the weather resistance of the resin constituting the container is It is unavoidable that both of them have a problem that the pressure resistance and the impact resistance are lowered due to the aging deterioration of the resin constituting the container.

  Therefore, the present invention provides a pressure-resistant container for a fire extinguisher having a pressure-resistant container filled with a fire extinguisher, and the pressure-resistant container is made of a pressure-resistant thermoplastic resin and contains a metal oxide on its outer surface. By forming the vapor-deposited layer to cover, the thermoplastic resin layer constituting the pressure-resistant container is covered with a vapor-deposited layer containing a metal oxide that exhibits ultraviolet shielding ability, and the pressure-resistant container is constituted by the thermoplastic resin. An object of the present invention is to obtain a fire extinguisher that can reliably prevent deterioration due to weather resistance of a resin layer and can maintain required pressure resistance and impact resistance over a long period of time.

  The present invention is a fire extinguisher comprising a pressure-resistant container filled with a fire extinguishing agent, wherein the pressure-resistant container is made of a thermoplastic resin having pressure resistance and has a metal oxide on its outer surface. It is characterized by having.

  The present invention is also a method for manufacturing a fire extinguisher comprising a pressure-resistant container filled with a fire extinguisher, and forming a pressure-resistant container filled with the fire-extinguishing agent by blow molding a parison of a thermoplastic resin, A vapor deposition layer containing a metal oxide is formed on the outer surface of the pressure-resistant container.

  In the fire extinguisher according to the present invention, the main layer of the pressure resistant container is preferably made of modified polyphenylene ether, and the outer periphery of the main layer of the pressure resistant container is preferably further covered with a shrink label. .

  According to the present invention, as a pressure-resistant container of a fire extinguisher having a pressure-resistant container filled with a fire extinguisher, the pressure-resistant container is made of a pressure-resistant thermoplastic resin and has a metal oxide on its outer surface. The heat which comprises a pressure-resistant container by covering the thermoplastic resin layer which comprises a pressure-resistant container with the vapor-deposited layer containing the metal oxide which exhibits ultraviolet shielding ability by setting it as the structure which has a vapor-deposited layer to contain. Degradation due to the weather resistance of the plastic resin layer can be reliably prevented, and required pressure resistance and impact resistance can be maintained over a long period of time.

It is a perspective view which expands and shows the pressure-resistant container of the fire extinguisher which concerns on this invention, and its one part. It is sectional drawing which shows the main body layer of a pressure-resistant container. 1 is an overall perspective view of a fire extinguisher according to the present invention. It is an aspect which blow-molds the pressure-resistant container of the fire extinguisher which concerns on this invention, Comprising: It is sectional drawing which shows the process which has arrange | positioned the parison of a thermoplastic resin between split molds. It is sectional drawing which shows the process which clamped the division mold from the process of FIG. 4, and was blow-molded. It is sectional drawing which shows the process of taking out the pressure-resistant container which is a molded article by opening a division | segmentation metal mold | die from the process of FIG.

  As shown in FIGS. 1 to 3, a fire extinguisher 1 according to the present invention includes a pressure resistant container 2 filled with a fire extinguishing agent. The pressure resistant container 2 is formed by applying a vapor deposition layer 4 containing a metal oxide on the outer surface of a main layer 3 made of a thermoplastic resin. In addition, as shown in FIG. 3, it is on the structure which coat | covers the outer peripheral surface of the vapor deposition layer 4 containing a metal oxide with the shrink label 5 on the further improvement in durability, and improvement in design property and display property. Is preferred.

  The pressure-resistant container 2 is a part that directly stores a fire extinguishing agent. The pressure-resistant container 2 includes a cylindrical barrel portion 6, a hemispherical bottom portion 7 provided at the lower portion of the barrel portion 6, and a mouth portion 8 provided at the upper portion of the barrel portion 6. In other words, the pressure-resistant container 2 has a mouth portion 8, a body portion 6, and a bottom portion 7 that are integrally formed in this order from the top.

  The mouth portion 8 has a cylindrical shape that protrudes. A screw portion 9 is formed on the outer periphery of the mouth portion 8, and a cap 11 of the operation portion 10 is attached to the screw portion 9. ing. The operation unit 10 has a fixed lever 12 and a movable lever 13. 14 is a fire extinguishing agent injection hose. Reference numeral 15 denotes a bottom cover, and the bottom cover 15 ensures a self-supporting stable posture of the pressure-resistant container 2. Reference numeral 16 denotes a latch hook.

  On the other hand, the bottom 7 is slightly smaller in diameter than the body 6 in order to fit the bottom cover 15. The bottom 7 is provided with a recess 17 for fixing the bottom cover 15.

  The depressions 17 are linear, and a plurality of depressions 17 are provided in a row in the horizontal direction and on the same surface on the outer periphery of the pressure-resistant container 2. And between each hollow part 17, the restraint part which does not have a hollow is provided (not shown). Thereby, reinforcement of the bottom part 7 is achieved.

  The pressure-resistant container 2 is blow-molded using a thermoplastic resin so that the screw portion 9, the body portion 6 and the bottom portion 7 are integrally formed at the same time.

  Examples of such blow molding include a direct blow molding method and a biaxial stretch blow molding method. Among these, the pressure-resistant container 2 is preferably formed by a direct blow molding method from the viewpoint that a lightweight main body can be easily formed.

  The thermoplastic resin constituting the main layer 3 of the pressure-resistant container 2 is an amorphous resin, and the resin used as the amorphous resin is polyamide (PA), amorphous polyarylate (PAR), polycarbonate (PC). , Polyethersulfone (PES), polymethyl methacrylate (PMMA), polyphenylene ether (PPE), polystyrene (PS), polysulfone (PSF), or a polymer alloy thereof. Among these, from the viewpoint of heat resistance and impact resistance, a polymer alloy using polyphenylene ether (PPE) is preferable. Specifically, a polymer alloy (PPE / PS alloy) of polyphenylene ether (PPE) and polystyrene (PS), a polymer alloy (PPE / HIPS alloy) of polyphenylene ether (PPE) and high-impact polystyrene (HIPS), Alternatively, a modified polyphenylene ether such as a polymer alloy (PPE / PA alloy) of polyphenylene ether (PPE) and polyamide (PA) is preferable, and a PPE / PS alloy having particularly excellent pressure resistance is particularly preferable. The thermoplastic resin constituting the main layer 3 of the pressure-resistant container 2 includes an ultraviolet shielding agent (such as a compound having an effect of absorbing or shielding ultraviolet rays) and a coloring pigment (organic polycyclic perylene pigment, organic polycyclic). Formula quinacridone pigments, carbon black, etc.) can be added.

  Examples of the organic shielding agent include an organic shielding agent and / or an inorganic shielding agent. Examples of organic screening agents include cinnamic acid derivatives, salicylic acid derivatives, camphor derivatives, triazine derivatives, benzophenone derivatives, dibenzoylmethane derivatives, β, β-diphenyl acrylate derivatives, p-aminobenzoic acid derivatives, and the like. Can do. As the inorganic shielding agent, in particular, a metal oxide pigment or nanopigment that may be coated or uncoated (average particle size of primary particles: generally 5 nm to 100 nm, preferably 10 nm to 50 nm), For example, titanium oxide (amorphous or rutile and / or anatase type crystals), which are all well known photoprotective agents that act by physically blocking (reflecting and / or scattering) UV light. And nano-pigments of iron oxide, zinc oxide, zirconium oxide or cerium oxide. Examples of the metal oxide having an ultraviolet shielding ability include titanium oxide, zinc oxide, cerium oxide, and silica. In particular, when the metal oxide is a fine particle having an average particle size of 0.1 μm or less, the scattering ability in the ultraviolet wavelength region is exhibited, and ultraviolet rays can be blocked in a wide range. Further, since the inorganic ultraviolet blocking agent has high chemical stability, it is suitable as a constituent material of the vapor deposition layer 4 applied to the pressure-resistant container of a fire extinguisher that is often used after being stored for a long period of time.

  Examples of the vapor deposition method of the vapor deposition layer 4 formed on the outer surface of the main layer 3 of the pressure resistant container 2 include vacuum vapor deposition, sputtering method, and ion plating method.

  The shrink label 5 is preferably made of a cylindrical heat-shrinkable film. As such a shrink label 5, a single-layer or multilayer transparent film made of polyester, polyurethane, nylon, polyethylene, polypropylene or the like is used. Among them, the shrink label 5 is preferably a heat-shrinkable film made of polyester from the viewpoint of versatility. The shrink label 5 can be printed.

  Since the vapor deposition layer 4 containing a metal oxide is laminated so as to cover the entire outer surface of the main layer 3 of the pressure-resistant container 2, the vapor deposition layer 4 allows light such as ultraviolet rays from the outside, wind and rain, etc. to reach the main layer 3. Without being absorbed and blocked by the vapor deposition layer 4. For this reason, it is possible to reliably prevent deterioration of weather resistance, pressure resistance, impact resistance, etc. even under severe conditions such as being installed outdoors for a long period of time. In particular, in this type of fire extinguisher 1, the shoulder 18 and the bottom 7 of the pressure-resistant pressure-resistant container 2 are prevented from aging, and are safe and stable over a long period of time under particularly severe conditions such as outdoors. Enable use.

  The wall thickness of the pressure-resistant container 2 is preferably an average thickness of 2.0 mm or more, and more preferably 2.5 to 4.5 mm. When the average wall thickness is less than 2.0 mm, the pressure resistance tends to be insufficient as compared with the case where the wall thickness is within the above range, and when the wall thickness exceeds 5.0 mm, Compared with the case where the wall thickness is within the above range, not only the cost is increased, but also the weight is increased and it is difficult to carry the fire extinguisher.

  The breaking pressure of the pressure resistant container 2 is preferably 4.0 MPa or more. In this case, even if the high pressure gas in a general fire extinguisher pressurizes the inside of the fire extinguisher container, the fire extinguisher container can be reliably prevented from being deformed.

  The bending elastic modulus of the thermoplastic resin constituting the pressure-resistant container 2 is preferably 2000 Mpa or more, and more preferably 2000 to 5000 MPa. The flexural modulus is a value measured according to ASTM D790. When the bending elastic modulus is less than 2000 MPa, the pressure resistance tends to be inferior compared to the case where the bending elastic modulus is within the above range, and there is a risk that permanent deformation occurs in the body with respect to the pressure.

  The bending strength of the pressure resistant container 2 is preferably 70 MPa or more, and more preferably 70 to 95 MPa. The bending strength is a value measured according to ASTM D790. When the bending strength is less than 70 MPa, the pressure strength tends to be inferior compared to the case where the bending strength is within the above range, and cracking easily occurs with respect to the pressure.

  The Izod impact strength of the pressure-resistant container 2 is preferably 90 J / m or more, and more preferably 90 to 150 J / m. The tensile strength is a value measured according to ASTM D256 (with notch). When the Izod impact strength is less than 90 MPa, the Izod impact strength tends to be inferior in impact resistance compared to the case where the Izod impact strength is within the above range, and there is a possibility that the Izod impact strength may burst due to dropping or the like.

  In addition, it is preferable that the fire extinguisher 1 which concerns on this invention is a pressurization type fire extinguisher from a durable viewpoint, and it is preferable that the fire extinguisher used for this is a powder. For example, those containing ammonium dihydrogen phosphate as the main component, those containing sodium hydrogen carbonate as the main component, and those containing potassium hydrogen carbonate as the main component.

  The pressure-resistant container 2 of the fire extinguisher 1 according to the present invention is such that the main layer 3 is blow-molded as shown in FIGS. That is, 19 and 19 are divided molds, and 20 is an extrusion head, and a thermoplastic resin parison 21 extruded from the extrusion head 20 is disposed between the divided molds 19 and 19 (FIG. 4), and then the divided molds. 19 and 19 are clamped and blow-molded (FIG. 5), and the main layer 3 of the pressure-resistant container 2 as a molded product is taken out (FIG. 6). In addition, as shown in FIG. 6, the burr | flash 22 which has arisen in the bottom part 7 of the main body layer 3 of the pressure | voltage resistant container 2 is removed by post-processing.

  Subsequently, the vapor deposition layer 4 containing a metal oxide is formed as post-processing on the outer peripheral surface of the main layer 3 of the pressure-resistant container 2 blow-molded as described above.

  In addition, when applying the shrink label 5 further on the outer peripheral surface of the vapor deposition layer 4, the outer surface of the pressure-resistant container 2 is covered with the cylindrical shrink label 5, and the shrink label 5 is adhered to the outer peripheral surface of the vapor deposition layer 4 by heat shrinkage. Let

DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Pressure-resistant container 3 Main body layer 4 Deposition layer 5 Shrink label 6 Trunk part 7 Bottom part 8 Portion part 9 Screw part 10 Operation part 11 Cap 12 Fixed lever 13 Movable lever 14 Fire extinguisher injection hose 15 Bottom cover 16 Latch hook 17 Indentation 18 Shoulder 19, 19 Split mold 20 Extrusion head 21 Parison 22 Burr

Claims (4)

A fire extinguisher having a pressure-resistant container filled with a fire extinguisher,
The fireproof container is made of a thermoplastic resin having pressure resistance and has a vapor deposition layer containing a metal oxide on its outer surface.   The fire extinguisher according to claim 1, wherein the main layer of the pressure-resistant container is made of modified polyphenylene ether.   The fire extinguisher according to claim 1 or 2, wherein the outer periphery of the main layer of the pressure-resistant container is further covered with a shrink label. A method of manufacturing a fire extinguisher comprising a pressure-resistant container filled with a fire extinguisher,
Forming a pressure-resistant container filled with the fire extinguishing agent by blow molding a thermoplastic resin parison,
Next, a fire extinguisher manufacturing method is characterized in that a vapor deposition layer containing a metal oxide is formed on the outer surface of the pressure-resistant container.

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