JP2011030799A - 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 coating film layer 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. For the pressure resistant container 2, a body layer 3 is formed of a pressure resistant thermoplastic resin and the coating film layer 4 is provided on the outer surface. The coating film layer 4 is formed by the coating film of a resin coating material to which an ultraviolet ray shielding agent is added. <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.

  Accordingly, the present invention provides a pressure-resistant container for a fire extinguisher equipped with a pressure-resistant container filled with a fire extinguisher, and the pressure-resistant container is made of a pressure-resistant thermoplastic resin and has a coating layer on its outer surface. With this configuration, the thermoplastic resin layer constituting the pressure-resistant container is covered with a coating layer to reliably prevent deterioration due to the weather resistance of the thermoplastic resin layer constituting the pressure-resistant container. The object is to obtain a fire extinguisher that can maintain the required pressure resistance and impact resistance over a period of time.

  The present invention is a fire extinguisher including a pressure-resistant container filled with a fire extinguishing agent, and the pressure-resistant container is made of a pressure-resistant thermoplastic resin and has a coating layer on an outer surface thereof. It is characterized by this.

  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 coating layer is formed on the outer surface of the pressure-resistant container.

  In the fire extinguisher according to the present invention, the coating layer is preferably formed of a resin coating film to which an ultraviolet shielding agent is added, and the outer periphery of the coating layer is further coated with a shrink label. More preferably it is.

  In the method for manufacturing a fire extinguisher according to the present invention, it is preferable that the coating layer is formed by applying a resin paint to which an ultraviolet shielding agent is added.

  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, a structure made of a thermoplastic resin having pressure resistance and having a coating layer on its outer surface; By covering the thermoplastic resin layer constituting the pressure resistant container with a coating layer, the deterioration due to the weather resistance of the thermoplastic resin layer constituting the pressure resistant container is surely prevented, and the required pressure resistance is maintained over a long period of time. Property and impact resistance can be maintained.

It is sectional drawing which expands and shows the pressure-resistant container of the fire extinguisher which concerns on this invention, and its one part. It is a perspective view which fractures | ruptures and shows the other form of a pressure-resistant container partially. 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 taking out the pressure-resistant container which is a molded article by opening a division | segmentation metal mold | die from the process of FIG. It is a perspective view which shows the aspect coat | covered with a shrink label, after forming a coating-film layer in the outer surface of the pressure-resistant container obtained at 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 coating layer 4 on the outer surface of a main layer 3 made of a thermoplastic resin. In the embodiment shown in FIG. 2, the outer periphery of the coating layer 4 is further covered with a shrink label 5.

  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. That is, in the pressure resistant container 2, the mouth portion 8, the body portion 6, and the bottom portion 7 are integrated in this order in order from the top.

  The mouth portion 8 has a cylindrical shape with protrusions, and 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 mouth portion 8. 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 portion 7 has a slightly smaller diameter than the trunk portion in order to fit the bottom cover 15. Further, a recess 17 for fixing the bottom cover 15 is provided at the bottom.

  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 coating layer 4 is formed by applying a paint obtained by adding an inorganic shielding agent to a polyhydric alcohol solvent on the outer surface of the main layer 3 made of the thermoplastic resin. 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, all well-known photoprotective agents that act by physically blocking (reflecting and / or scattering) UV light, such as titanium oxide (amorphous or rutile and / or anatase type crystals). , Iron oxide, zinc oxide, zirconium oxide or cerium oxide nanopigment. And since such inorganic type ultraviolet blocker has high chemical stability, it is suitable as a coating agent applied to the pressure-resistant container 2 made of resin that may be used after being stored for a long period of time.

  The coating layer 4 can be a colored layer. In this case, thermoplastic resins such as polyvinyl alcohol, polyvinyl chloride, polyurethane, ethyl cellulose, thermosetting resins such as phenol, melamine, alkyd, unsaturated polyester, silicone rubber, epoxy, titanium oxide, zinc oxide, organic A dispersion in which a pigment such as a polycyclic perylene pigment, an organic polycyclic quinacridone pigment, or carbon black is dispersed is used.

  The shrink label 5 is preferably made of a cylindrical heat-shrinkable film and covers the outer periphery of the main layer 3 having the coating layer 4. 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 coating layer 4 is laminated so as to cover the entire outer surface of the main layer 3, the coating layer 4 absorbs rays such as ultraviolet rays and wind and rain from the outside without reaching the main layer 3 by the coating layer 4. Blocked. 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 container 2 are prevented from being deteriorated over time so that they can be used safely and stably for a long period of time under particularly severe conditions such as outdoors. Make it possible.

  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 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.

  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.

  Next, the coating material layer 4 is formed by applying the coating material to the outer peripheral surface of the main layer 3 of the pressure-resistant container 2 which is a molded product by blow molding.

  And when covering the shrink label 5 further on the outer peripheral surface of the coating-film layer 4, as shown in FIG. 7, the cylindrical shrink label 5 is covered on the outer surface of the pressure-resistant container 2, and the shrink label 5 is heated. The pressure resistant container 2 of the fire extinguisher 1 shown in FIG. Examples of the coating method for forming the coating layer 4 include a so-called dipping coating method in which the coating layer is formed by dipping in the coating material, and a spray coating method.

DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Pressure-resistant container 3 Main body layer 4 Coating 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 Dimple 18 Shoulder
19, 19 Split mold 20 Extrusion head 21 Parison 22 Bali

Claims (5)

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 coating layer on the outer surface thereof.   The fire extinguisher according to claim 1, wherein the coating layer is formed of a coating film of a resin paint to which an ultraviolet shielding agent is added.   The fire extinguisher according to claim 1 or 2, wherein the outer periphery of the coating layer 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, wherein a coating layer is formed on the outer surface of the pressure-resistant container.   The method for producing a fire extinguisher according to claim 4, wherein the coating layer is formed by applying a resin paint to which an ultraviolet shielding agent is added.

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