JP2011050516A - Fire extinguisher and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire extinguisher whose pressure-resistant container itself is reliably prevented from deteriorating due to weatherability and which maintains necessary pressure resistance and impact resistance for a long period of time, and to provide a method for manufacturing the same. <P>SOLUTION: The fire extinguisher 1 is provided with the pressure-resistant container which is filled with a fire extinguishing agent. The pressure-resistant container comprises a thermoplastic resin which is resistant to pressure and to which an ultraviolet shielding agent (a) and a color pigment (b) having the ultraviolet absorbing property is added. The pressure-resistant container is blow-molded by arranging a parison of the thermoplastic resin, which is resistant to pressure and to which the ultraviolet shielding agent and the color pigment having the ultraviolet absorbing property is added, between divided molds. The ultraviolet shielding agent to be added to the thermoplastic resin comprising the pressure-resistant container is an organic ultraviolet shielding agent or an inorganic ultraviolet shielding agent. The color pigment is an organic polycyclic perylene-based pigment, an organic polycyclic quinacridone-based pigment, or carbon black. <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. In view of this, techniques for reinforcing the pressure resistance of the container have been developed, and 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 is configured as a pressure-resistant container of a fire extinguisher equipped with a pressure-resistant container filled with a fire extinguisher, and is composed of a pressure-resistant thermoplastic resin to which an ultraviolet shielding agent is added. It is an object of the present invention to obtain a fire extinguisher that can reliably prevent deterioration due to property and can maintain required pressure resistance and impact resistance over a long period of time.

  The present invention is a fire extinguisher equipped with a pressure-resistant container filled with a fire extinguishing agent, wherein the pressure-resistant container is composed of a thermoplastic resin having pressure resistance to which an ultraviolet shielding agent is added. To do.

  Further, the present invention is a method of manufacturing a fire extinguisher including a pressure-resistant container filled with a fire extinguishing agent, wherein a parison of a thermoplastic resin having pressure resistance to which an ultraviolet shielding agent is added is disposed between divided molds, Next, the split mold is clamped and blow-molded to obtain a pressure-resistant container filled with the fire extinguisher made of a pressure-resistant thermoplastic resin to which an ultraviolet shielding agent is added.

  In the fire extinguisher according to the present invention, the thermoplastic resin constituting the pressure-resistant container is further added with a color pigment having ultraviolet absorption performance, and the ultraviolet shielding agent added to the thermoplastic resin constituting the pressure-resistant container. Is an organic ultraviolet shielding agent, an inorganic ultraviolet shielding agent, and a coloring pigment having an ultraviolet absorbing property to be added to the thermoplastic resin constituting the pressure resistant container is an organic polycyclic perylene pigment, organic polycyclic pigment A quinacridone pigment or carbon black is preferred.

  According to the present invention, as a pressure-resistant container of a fire extinguisher equipped with a pressure-resistant container filled with a fire extinguisher, the pressure-resistant container itself is configured by being composed of a pressure-resistant thermoplastic resin added with an ultraviolet shielding agent. It is possible to reliably prevent deterioration due to weather resistance and to maintain required pressure resistance and impact resistance over a long period of time.

It is a whole sectional view showing a pressure-proof container of a fire extinguisher concerning the present invention, and an expanded sectional view of a portion surrounded by a small circle. It is a whole perspective view which shows the pressure-resistant container of the fire extinguisher which concerns on this invention. 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 multilayer parison of a thermoplastic resin between division 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 opening a division | segmentation metal mold | die from the process of FIG. 5, and taking out a molded product.

  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 body 3 of the pressure resistant container 2 is cylindrical, 4 is a shoulder portion, 5 is a mouth portion, and 6 is a bottom portion. The mouth portion 5 has a cylindrical shape with a protrusion, and a screw portion 7 is formed on the outer periphery of the mouth portion 5, and a cap 9 of the operation portion 8 is attached to the mouth portion 5. The operation unit 8 includes a fixed lever 10 and a movable lever 11. 12 is a fire extinguishing agent injection hose. Reference numeral 13 denotes a bottom cover, and the bottom cover 13 ensures a self-supporting stable posture of the pressure-resistant container 2. Reference numeral 14 denotes a latch hook. In the illustrated embodiment, the outer periphery of the body 3 of the pressure vessel 2 is further covered with the shrink label 15 from the shoulder 4 to the bottom 6.

  The pressure resistant container 2 is made of a pressure resistant thermoplastic resin to which an ultraviolet shielding agent is added, and the ultraviolet shielding agent added to the thermoplastic resin is an organic ultraviolet shielding agent or an inorganic ultraviolet shielding agent. . A color pigment having ultraviolet absorption performance can be further added to the thermoplastic resin. In FIG. 1, “a” represents an added ultraviolet shielding agent, and “b” represents a colored pigment having the same ultraviolet absorbing performance.

  Examples of the organic ultraviolet shielding agent include salicylate-based, benzophenone-based, cyanoacrylate-based, hydantoin-based derivatives, and Hindamine-based (light stabilizer) organic compounds. Examples of the inorganic ultraviolet shielding agent include metal oxides such as titanium oxide, zinc oxide, cerium oxide, and silica, talc, mica, kaolin, calcium carbonate, and carbon black. When the metal oxide is a fine particle having an average particle diameter of 0.1 μm or less, it exhibits a scattering ability in the ultraviolet wavelength region, and can block ultraviolet rays in a wide range. Therefore, the inorganic ultraviolet shielding agent has high chemical stability and is suitable as an ultraviolet shielding agent added to the pressure-resistant thermoplastic resin constituting the pressure-resistant container 2 of the fire extinguisher that may be stored for a long period of time. It is. On the other hand, even if an organic ultraviolet shielding agent can be expected to have an immediate ultraviolet shielding effect, there is a problem that it is inferior in terms of durability, durability, safety and the like.

  The colored pigment having an ultraviolet absorption performance added to the thermoplastic resin constituting the pressure resistant container 2 is an organic polycyclic perylene pigment, an organic polycyclic quinacridone pigment, or carbon black. By adding this kind of coloring pigment to the thermoplastic resin constituting the pressure resistant container 2, the weather resistance of the pressure resistant container 2 can be further improved and the appearance can be improved.

  The pressure-resistant container 2 is obtained by blow-molding a pressure-resistant thermoplastic resin as described above. Examples of the 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.

  Resin used as the pressure-resistant thermoplastic resin constituting the pressure-resistant container 2 is polyamide (PA), amorphous polyarylate (PAR), polycarbonate (PC), polyethersulfone (PES), polymethyl methacrylate (PMMA), polyphenylene ether (PPE), polystyrene (PS), polysulfone (PSF), or those obtained by polymerizing them. Among these, the amorphous resin is preferably a polymer alloy using polyphenylene ether (PPE) from the viewpoint of heat resistance and impact resistance. 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, modified polyphenylene ether such as polymer alloy (PPE / PA alloy) of polyphenylene ether (PPE) and polyamide (PA) can be used. Among these, the amorphous resin is particularly preferably a PPE / PS alloy having extremely excellent pressure resistance.

  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 pressure-resistant thermoplastic resin constituting the pressure-resistant container 2 is preferably 2000 Mpa or more, and more preferably 2000 to 5000 MPa. This 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. This tensile strength is a value measured according to ASTM D256 (notched). 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.

  The shrink label 15 is preferably in close contact so as to cover the outer periphery of the pressure-resistant container 2. The shrink label 15 is preferably made of a cylindrical heat-shrinkable film. As such a shrink label 15, a single-layer or multilayer transparent film made of polyester, polyurethane, nylon, polyethylene, polypropylene or the like is used. Among them, the shrink label 15 is preferably a heat-shrinkable film made of polyester from the viewpoint of versatility. The shrink label 15 can be printed. The shrink label 15 is preferably printed on the entire surface. That is, the shrink label 15 has various indications on the pressure-resistant container 2 and is printed on the back surface of the transparent heat-shrinkable film so as to block the ultraviolet rays from the outside. It is preferable that it is formed in a shape. Thereby, the further improvement of the ultraviolet blocking effect of the pressure-resistant container 2 is achieved.

  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. An accumulator fire extinguisher may be used.

  The pressure-resistant container 2 of the fire extinguisher 1 according to the present invention is blow-molded as shown in FIGS. That is, 16 and 16 are divided molds, 17 is an extrusion head, and the parison 18 extruded from the extrusion head 17 has a pressure resistance to which an ultraviolet shielding agent is added and a color pigment having ultraviolet absorption performance is further added. A thermoplastic resin is heated and melted. In blow molding, the parison 18 is disposed between the divided molds 16 and 16 (FIG. 4), and then the divided molds 16 and 16 are clamped and blow molded (FIG. 5), and the pressure-resistant container 2 is taken out. (FIG. 6). In addition, as shown in FIG. 6, the burr | flash 19 which has arisen in the bottom part of the pressure | voltage resistant container 2 is removed by post-processing.

DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Pressure-resistant container 3 Trunk part 4 Shoulder part 5 Mouth part 6 Bottom part 7 Screw part 8 Operation part 9 Cap 10 Fixed lever 11 Movable lever 12 Extinguishing agent injection hose 13 Bottom cover 14 Latch hook 15 Shrink label 16, 16 Split mold 17 Extrusion head 18 Parison 19 Burr a UV shielding agent b Color pigment having UV absorbing performance

Claims (4)

A fire extinguisher having a pressure-resistant container filled with a fire extinguisher,
The fire resistant container is made of a thermoplastic resin having pressure resistance to which an ultraviolet shielding agent is added.   The fire extinguisher according to claim 1, wherein a color pigment having an ultraviolet absorbing performance is further added to the thermoplastic resin constituting the pressure resistant container. A method of manufacturing a fire extinguisher comprising a pressure-resistant container filled with a fire extinguisher,
Placed a pressure-resistant thermoplastic resin parison with added UV shielding agent between split molds,
Next, a method for manufacturing a fire extinguisher is characterized in that a pressure-resistant container filled with the fire-extinguishing agent made of a thermoplastic resin having pressure resistance to which an ultraviolet shielding agent is added is obtained by clamping and blow-molding the divided mold. .   4. The method for manufacturing a fire extinguisher according to claim 3, wherein a color pigment having an ultraviolet absorbing performance is further added to the pressure-resistant thermoplastic resin to which the ultraviolet shielding agent is added.

Images