CN103569552B - Plastic dustbin with heat-resisting and fireproofing functions - Google Patents

Abstract

The invention relates to a plastic trash can with heat-resistant and fireproof functions, which comprises a cylindrical plastic barrel with an open top and a plastic cover; the plastic cover includes a top wall and a cylindrical sleeve-shaped side wall, the At least one window is opened on the side wall; a groove is arranged on the outer wall of the plastic barrel, a snap ring is arranged in the groove, a protrusion is formed in the side wall of the plastic cover, and the protrusion Supported on the clasp so that the plastic cover remains in the use position; when the temperature inside the plastic barrel reaches a set value, the clasp shrinks and/or melts, so that the plastic cover moves along the The outer wall of the plastic barrel slides down and makes the passage through the window to the upper opening of the plastic barrel closed. The plastic trash can prevents and/or significantly reduces the oxygen necessary for combustion from entering the plastic bucket, and prevents the spread of open flames and smoldering, which greatly improves the fire safety of the trash can.

Description

Plastic trash can with heat and fire resistance

technical field

The invention belongs to the technical field of daily plastic products, and more specifically, the invention relates to a plastic trash can with heat-resistant and fireproof functions.

Background technique

Trash cans are all over the streets and alleys of cities and rural areas. As a social public product, it helps to maintain the cleanliness of the city and facilitates people's lives. However, any waste generated in life often ends up in trash cans. Including combustible materials such as paper, weeds, waste gas lighters, cigarette butts, etc., which are easy to ignite in the trash can, resulting in safety hazards, and fires caused by the spontaneous combustion of trash cans also occur from time to time. In addition, in public places Garbage in trash cans is intentionally set on fire due to acts of vandalism, such as children playing.

Contents of the invention

In order to solve the above-mentioned technical problems in the prior art, the object of the present invention is to provide a plastic trash can with heat-resistant and fire-proof functions.

A plastic trash can with heat-resistant and fireproof functions, comprising a cylindrical plastic barrel with an open top, and a plastic cover fastened on the upper part of the plastic barrel; the plastic cover includes a top wall and a cylinder A sleeve-shaped side wall, the side wall extends downward from the top wall, and at least one window is opened on the side wall close to the top wall; it is characterized in that: the outer wall of the plastic barrel is provided with grooves, A snap ring extending toward the side wall of the plastic cover is provided in the groove, a protrusion is formed in the side wall of the plastic cover, and the protrusion is supported on the snap ring to keep the plastic cover In the use position, the passage through the window to the upper opening of the plastic barrel is open; the snap ring is made of heat-sensitive resin material and shrinks when the temperature inside the plastic barrel reaches a set value And/or melting, so that the plastic cover slides down along the outer wall of the plastic barrel under the action of gravity and makes the top wall of the plastic cover contact with the upper opening of the plastic barrel, so that through The passage from the window to the upper opening of the plastic barrel is closed.

Among them, in order to set the temperature at about 160°C, a modified alkyd resin that will undergo significant softening and shrinkage (>70%) above 160°C is selected as the heat-sensitive resin material; the manufacturing process of the modified alkyd resin is as follows : 18.2wt% soybean oil fatty acid, 4.8wt% methylsuccinic acid, 8.8wt% hydroxyl-terminated polybutadiene, 5.1wt% polytetramethylene glycol, 10.8wt% phthalic anhydride, Add 3.08wt% xylene, 0.35wt% maleic anhydride and the rest of rosin into the esterification kettle, heat up to 150°C, start stirring, and when the temperature rises to 180°C, reflux at a constant temperature for 1 hour; continue to heat up to 225°C ~230℃, reflux esterification, keep the acid value less than 10mgKOH/g, pump into the reaction kettle, cool and solidify.

Compared with the prior art, the plastic trash can of the present invention has the following beneficial effects:

The heat-resistant and fire-resistant plastic trash can of the present invention can suffocate a fire that has already started by preventing and/or significantly reducing the oxygen necessary for combustion from entering the plastic barrel of the trash can in the case of fire , to prevent the spread of open flames and smoldering fires. In the plastic trash can according to the present invention, as long as the temperature reaches the softening and/or melting temperature of the resin heat-sensitive material, the softening and/or melting of the resin heat-sensitive material will make the plastic cover under the action of gravity along the The outer wall of the plastic barrel slides down and makes the top wall of the plastic cover contact with the upper opening of the plastic barrel, thereby basically preventing the oxygen required for combustion from entering the plastic barrel, which is very large To a certain extent, the fire safety of the trash can is improved, and it is more difficult for the fire to spread to the outside of the trash can.

Description of drawings

The schematic diagram of the plastic garbage can in the embodiment of Fig. 1 is in use.

Fig. 2 is a schematic structural diagram of the cooperation between the clasp of the plastic trash can and the protrusion in the embodiment.

Fig. 3 is a schematic diagram of the closed state of the plastic trash can according to the embodiment.

Detailed ways

The heat-resistant and fire-resistant plastic trash can of the present invention will be further described below in conjunction with specific embodiments and accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and accurate understanding of the inventive concept and technical solutions of the present invention. in-depth understanding.

As shown in Figures 1-3, the plastic trash can with heat-resistant and fireproof functions according to the present invention includes a cylindrical plastic barrel body 10 with an upper opening 12, and a plastic trash can buckled on the top of the plastic barrel body 10. Plastic cover 20; the plastic cover 20 includes a top wall 21 and a cylindrical sleeve-shaped side wall 22, the side wall 22 extends downward from the top wall, and at least A window 23; the outer wall 14 of the plastic barrel 10 is provided with a groove 18, and the groove 18 is provided with a snap ring 30 extending toward the side wall of the plastic cover, and the side of the plastic cover 20 A protrusion 24 is formed in the wall, said protrusion 24 is supported on said snap ring 30 so that the plastic cover 20 remains in the use position, as shown in Figure 1 , through the passage through the window to the upper opening of the plastic barrel is open; the clasp is made of heat-sensitive resin material and when the temperature inside the plastic barrel reaches a set value, the clasp shrinks and/or melts, so that the plastic cover moves along the The outer wall of the plastic barrel slides down and makes the top wall of the plastic cover contact with the upper opening of the plastic barrel, as shown in Figure 3, so that the passage to the upper opening of the plastic barrel via the window is closed.

Among them, in order to set the temperature at about 160°C, a modified alkyd resin that will undergo significant softening and shrinkage (>70%) above 160°C is selected as the heat-sensitive resin material; the manufacturing process of the modified alkyd resin is as follows : 18.2wt% soybean oil fatty acid, 4.8wt% methylsuccinic acid, 8.8wt% hydroxyl-terminated polybutadiene, 5.1wt% polytetramethylene glycol, 10.8wt% phthalic anhydride, Add 3.08wt% xylene, 0.35wt% maleic anhydride and the rest of rosin into the esterification kettle, heat up to 150°C, start stirring, and when the temperature rises to 180°C, reflux at a constant temperature for 1 hour; continue to heat up to 225°C ~230℃, reflux esterification, keep the acid value less than 10mgKOH/g, pump into the reaction kettle, cool and solidify.

Wherein, in order to ensure that the snap ring shrinks and/or melts so that the plastic cover can slide down smoothly along the outer wall of the plastic barrel under the action of gravity, preferably, the outer wall of the plastic barrel A smooth heat-resistant coating 16 is also provided on it. The smooth heat-resistant coating has a thickness of 100-500 μm. The smooth heat-resistant coating is sprayed with 18wt% of 2,2'-dihydroxy-5,5'-dichloro-diphenyl sulfide, 12wt% of melamine formaldehyde resin, 8wt% of polytetrafluoroethylene, 5wt% of dimethylsiloxane, 5wt% of hydroxyethyliminodiacetic acid, 5wt% of calcium fluoride, 2wt% of alkyl ether sulfonate and the balance of polyaryletherketone. The smooth heat-resistant coating can still maintain good non-stick and smoothness under the condition of up to 250°C, and can ensure the smooth sliding of the plastic cover.

Wherein, the plastic barrel and the plastic cover are prepared from a heat-resistant and flame-retardant resin composition. The heat-resistant and flame-retardant resin composition is 12-15wt% of polyparaben, 5-8wt% of polyacrylonitrile, 5-8wt% of methacrylate, 2-3wt% of polyparaphenylene A mixture of propylene glycol diformate, 1.5-2wt% triethyl phosphate, 1.2-1.5wt% aluminum hydroxide, 1.8-2.0wt% magnesium hydroxide and the remainder polyimide.

The heat-resistant and fire-resistant plastic trash can prevents and/or significantly reduces the oxygen necessary for combustion from entering the plastic barrel of the trash can in case of fire, so that it can smother the fire that has started to ignite, and realize Stop the spread of open flames and smoldering fires. In the plastic trash can according to the present invention, as long as the temperature reaches the softening and/or melting temperature of the resin heat-sensitive material, the softening and/or melting of the resin heat-sensitive material will make the plastic cover under the action of gravity along the The outer wall of the plastic barrel slides down and makes the top wall of the plastic cover contact with the upper opening of the plastic barrel, thereby basically preventing the oxygen required for combustion from entering the plastic barrel, which is very large It improves the fire safety of the trash can to a certain extent, and makes it more difficult for the fire to spread to the outside of the trash can.

Example 1

The plastic barrel and plastic lid described in this embodiment are formed by die-casting using a heat-resistant and flame-retardant resin composition, the heat-resistant and flame-retardant resin composition is 15wt% of polyparaben, 5wt% of polypropylene Nitrile, 5wt% methacrylate, 2~3wt% polytrimethylene terephthalate, 2wt% triethyl phosphate, 1.2wt% aluminum hydroxide, 2.0wt% magnesium hydroxide and the rest A mixture of polyimides.

Example 2

The plastic barrel and plastic lid described in this embodiment are formed by die-casting using a heat-resistant and flame-retardant resin composition. The heat-resistant and flame-retardant resin composition is 12wt% polyparaben, 8wt% polypropylene Nitrile, 8wt% of methacrylate, 2wt% of polytrimethylene terephthalate, 1.5wt% of triethyl phosphate, 1.5wt% of aluminum hydroxide, 1.8wt% of magnesium hydroxide and the balance of poly A mixture of imides.

Comparative example 1

The plastic barrel and plastic lid described in this embodiment are formed by die-casting using a heat-resistant and flame-retardant resin composition, the heat-resistant and flame-retardant resin composition is 15wt% of polyparaben, 5wt% of polypropylene A mixture of nitrile, 5wt% methacrylate, 1.5wt% triethyl phosphate, 1.2wt% aluminum hydroxide, 2.0wt% magnesium hydroxide and the remainder polyimide.

Comparative example 2

The plastic barrel and plastic lid described in this embodiment are formed by die-casting using a heat-resistant and flame-retardant resin composition. The heat-resistant and flame-retardant resin composition is 12wt% polyparaben, 8wt% polypropylene A mixture of nitrile, 8wt% methacrylate, 1.5wt% triethyl phosphate, 1.5wt% aluminum hydroxide, 1.8wt% magnesium hydroxide and the remainder polyimide.

The resin compositions described in Examples 1-2 and Comparative Examples 1-2 were extruded into pellets through a conventional twin-screw extruder (L/D=35, Φ=45mm). Each resin pellet was molded into a test sample using a 10 oz injection molding machine at 310°C. After exposure at 23°C and 50% RH for 48 hours, the thermal modification temperature was measured according to ASTM D648 under a pressure of 0.45 MPa. The thermal modification temperature of the resin composition described in Example 1-2 can reach 280-300°C, while the thermal modification temperature of the resin composition described in Comparative Example 1-2 is only 220-230°C.

In the present invention, for those skilled in the art, the specific embodiment is only an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as the method of the present invention is adopted Various insubstantial improvements made to the concepts and technical solutions, or direct application of the concepts and technical solutions of the present invention to other occasions without improvement are within the protection scope of the present invention.

Claims (3)

1. A plastic dustbin with heat-resistant and fireproof functions, comprising a cylindrical plastic barrel with an open top, and a plastic cover fastened on the top of the plastic barrel; the plastic cover includes a top wall and a cylindrical sleeve-shaped side wall, the side wall extends downward from the top wall, and at least one window is opened near the top wall of the side wall; it is characterized in that: the outer wall of the plastic barrel is provided with a concave A groove, the groove is provided with a snap ring extending toward the side wall of the plastic cover, a protrusion is formed in the side wall of the plastic cover, and the protrusion is supported on the snap ring so that the plastic cover The body remains in the use position, thus the passage through the window to the upper opening of the plastic barrel is opened; the snap ring is made of a heat-sensitive resin material and when the temperature in the plastic barrel reaches a set value, the snap ring Shrinkage and/or melting occurs, so that the plastic cover slides down along the outer wall of the plastic barrel under the action of gravity and makes the top wall of the plastic cover contact with the upper opening of the plastic barrel, thereby The passage to the upper opening of the plastic barrel via the window is closed; wherein, the heat-sensitive resin material is a modified alkyd resin, and the manufacturing process of the modified alkyd resin is as follows: the soybean oil fatty acid of 18.2wt% , 4.8wt% of methyl succinic acid, 8.8wt% of hydroxyl-terminated polybutadiene, 5.1wt% of polytetramethylene glycol, 10.8wt% of phthalic anhydride, 3.08wt% of xylene, 0.35 Add wt% maleic anhydride and the rest of rosin into the esterification kettle, heat up to 150°C, start stirring, when the temperature rises to 180°C, reflux at a constant temperature for 1 hour; continue to heat up to 225-230°C, reflux for esterification, Keep it until the acid value is less than 10mgKOH/g, pump it into the reaction kettle, cool and solidify. 2. The heat-resistant and fire-resistant plastic trash can according to claim 1, characterized in that: a smooth heat-resistant coating is also provided on the outer wall of the plastic barrel body, and its thickness is 100-500 μm ; The smooth heat-resistant coating is sprayed with 18wt% of 2,2'-dihydroxyl-5,5'-dichloro-diphenyl sulfide, 12wt% of melamine formaldehyde resin, 8wt% of polytetrafluoroethylene , 5wt% of dimethylsiloxane, 5wt% of hydroxyethyliminodiacetic acid, 5wt% of calcium fluoride, 2wt% of alkyl ether sulfonate and the balance of polyaryletherketone. 3. The heat-resistant and fireproof plastic trash can according to claim 1, characterized in that: the plastic barrel body and the plastic cover are prepared from a heat-resistant and flame-retardant resin composition.