JPH08243038A - Recyclable plastic shutter-type bathtub lid - Google Patents

Abstract

PURPOSE: To provide a recyclable shutter-type bathtub lid having an excellent heat retaining property, not exhausting any hazardous and poisonous gas even when treated by burning, and having excellent characteristics. CONSTITUTION: In a shallow cylindrical main body 1 having a flat bottom plate 2 molded by extruding a resin composite under heat over the longitudinal direction, wherein the resin composite is a mixture composed by mixing 95∼70wt. pts. of polypropylene resin or polystylene resin without containing halogen and 5∼30wt. pts. of mineral filling material, the main body 1 is juxtaposed at predetermined intervals in the lateral direction such that its longer sides are not to be in contact with each other, and the bottom plates 2 are connected to each other with ribbon-shaped soft synthetic resin joint plates 5, and further, both end opening portions 6 of the main body 1 are closed with a synthetic resin cap 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recyclable plastic shutter-type bathtub lid, and more particularly to a lightweight shutter-type bathtub lid having excellent heat retention.

[0002]

2. Description of the Related Art As a lid for a bath, there is a shutter type made of plastic. A shutter-type bathtub lid is made up of a number of strip-shaped bodies that are connected in parallel with a joint plate, is foldable, and fits well with the bathtub opening. It is the mainstream. The main body of this shutter-type bathtub lid is manufactured by extrusion molding, but as a raw material thereof, a vinyl chloride resin has been mainly used because of its ease of processing and low cost.

[0003]

However, when this vinyl chloride resin is incinerated, it has the drawbacks that it produces a large amount of chlorine-based toxic and harmful gases, and it has a high heat calorie during incineration, which damages the incinerator and is therefore discarded. Processing was a big problem. For this reason, there are movements to regulate the use of vinyl chloride resin in household products, and in some countries it is currently prohibited. In Japan as well, there is no doubt that its use will be restricted in the future, and the present situation is that a new material to replace this is required.

Further, vinyl chloride resin is poor in heat resistance and impact resistance, and when a bathtub lid is made of this as a raw material, it is likely to be melted due to overheating, and the lid may be damaged by a hand or a foot, so that the body is free. There was also the risk of unintentional infants and old people having unexpected accidents. Furthermore, because it is relatively heavy,
Opening and closing was not easy for infants and the elderly.

An object of the present invention is to solve the above-mentioned conventional problems associated with a plastic shutter-type bathtub lid, which is lightweight, has excellent heat retention, is recyclable, and is toxic even when incinerated. It is an object of the present invention to provide a recyclable shutter-type bathtub lid that does not occur, has a strong strength, and can prevent accidents caused by the bathtub.

[0006]

The present invention is a halogen-free polypropylene resin or polystyrene resin 95.
˜70 parts by weight and 5 to 30 parts by weight of inorganic filler are extruded under heating to form a flat tubular main body 1 having a flat bottom plate portion 2 in the longitudinal direction.
Are arranged side by side at predetermined intervals so that their long sides do not contact each other in the lateral direction, and the bottom plate portions 2 between the main bodies 1 are connected by a ribbon-shaped soft synthetic resin joint plate 5, and The above problem is solved by closing both end openings 6 of the main body 1 with synthetic resin caps 7.

[0007]

The external appearance is the same as that of the conventional shutter-type bathtub lid and can be used in the same manner, but the main body is a polypropylene resin or polystyrene resin 9 containing no halogen.
Since the resin composition is formed by mixing 5 to 70 parts by weight and 5 to 30 parts by weight of the inorganic filler, even if incinerated in an incinerator, a halogen-based poisonous substance such as vinyl chloride resin, No harmful gas is generated, and the heat calories at the time of incineration are low, so there is little risk of damaging the incinerator.

[0008] Further, it is easy to recycle, and it is possible to reuse it as a raw material for bathtub lids and various household daily necessities by crushing the parts as a whole without separating them and pelletizing them. Furthermore, it is extremely lightweight and easy to carry, attach to and remove from the bathtub, and it has excellent heat retention and can prevent a decrease in hot water temperature. Further, it has higher heat resistance, impact resistance, and strength than vinyl chloride-based ones, and can prevent accidents during boiling.

Furthermore, the sliding resistance is high, the safety is high, and the watertightness of the joint with the cap is high.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recyclable plastic shutter-type bathtub lid according to the present invention will be described below in detail with reference to the drawings. 1 is a plan view of an embodiment of a plastic shutter-type bathtub lid according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a partially enlarged plan view thereof, FIG. 4 is a partially enlarged side view thereof, and FIG. 5 is a cap. And FIG. 6 is a side view of the cap.

In the figure, reference numeral 1 denotes a main body, which is a halogen-free polypropylene resin or polystyrene resin 95 to 70.
1 part by weight of the inorganic filler and 5-30 parts by weight of the inorganic filler are extruded under heating to form a flat tube shape that is flat and has a flat bottom surface in the longitudinal direction. Has become.

The halogen-free polypropylene resin used in this example is a propylene polymer,
It means a copolymer (including a terpolymer) or a complex of propylene and EPR or EPDM. Polypropylene-based resins have the advantages of good heat resistance, mechanical strength, etc. compared to polyethylene-based resins, but have the drawback of poor moldability,
Such drawbacks can be eliminated by forming a compound compound.

The halogen-free polystyrene resin means a polymer of styrene and a copolymer of styrene and butadiene (including a terpolymer). Polystyrene-based resins have the advantages of good bending strength, moldability, etc., compared to polypropylene-based resins, but on the other hand, they have the drawback of inferior impact strength, but such drawbacks are due to the combination of a reinforced rubber component. It can be resolved.

Examples of the inorganic filler include calcium carbonate, talc, mica, whiskers, and finely pulverized whiskers such as finely pulverized glass fiber (milled fiber). Talc is particularly preferable. By adding 0.5 to 3 parts by weight in total of the stabilizer and the processing aid to 100 parts by weight of the resin composition, thermal stability, deterioration resistance and processability can be further improved. Examples of stabilizers include antioxidants and ultraviolet absorbers. Examples of the processing aid include metallic soap and ethylene wax. As a method of adding the stabilizer and the processing aid, a conventional method can be used, and thus detailed description thereof will be omitted.

The main bodies 1 are juxtaposed at regular intervals so that their long sides do not come into contact with each other, and are connected by a ribbon-shaped joint plate 5 made of a soft synthetic resin, as shown in FIG. It is a nice bathtub lid.

The joint plate 5 must be flexible because it must bend when the bathtub lid is folded or rolled, and must be made of soft synthetic resin. Considering this, it is preferable to use the same resin as the main body 1.

In this embodiment, the joint plate is made of thermoplastic styrene elastomer (trade name: Rheostomer manufactured by Riken Vinyl Industry Co., Ltd.) and has a width of about 2 mm with the bottom plate 2 of the main body 1 as shown in FIG. It is overlaid.

When the main body 1 and the joint plate 5 are integrally molded by using a two-color extrusion molding machine, the joint portion between the main body 1 and the joint plate 5 is in a superposed state, so that the two are extremely bonded. Become stronger.

On the other hand, caps 7 are attached to the openings 6 at both ends of the main body 1, and the openings 6 are closed. Reference numeral 8 in FIGS. 5 and 6 denotes an insertion piece provided on the cap 7 so that this portion is inserted into the opening 6. Note that FIG.
In FIG. 1, the cap 7 is attached only to the right end main body 1, but this is for clarifying the structure of the main body 1, and the caps 7 are actually attached to all the openings 6.

In this embodiment, the cap 7 is a halogen-free thermoplastic styrene elastomer (trade name:
Rheostomer (manufactured by Riken Vinyl Industry Co., Ltd.) as a material, and the insert piece 8 is formed slightly larger than the opening 6,
The insertion piece 8 is fitted into the opening 6 while applying ultrasonic waves of 20 KHz, and the physical properties peculiar to the styrene elastomer such as compression set, impact resilience, and slip resistance are utilized to open the opening 6
Is elastically closed. A hard olephene resin may be used as the material of the cap.

[0021]

Industrial Applicability The recyclable plastic shutter-type bathtub lid according to the present invention has the above-mentioned configuration, and even if it is incinerated in an incinerator, it is a toxic halogen-based substance such as vinyl chloride resin. No harmful gas is generated and there is no danger of damaging the incinerator. Further, it has excellent heat retention and can prevent a decrease in hot water temperature in the bathtub. Furthermore, it is easy to recycle, and it can be reused as a raw material for bathtub lids and various daily necessities by crushing the parts as a whole without separating them and pelletizing them.
In addition, it has many advantages such as heat resistance, impact resistance, and slip resistance compared with vinyl chloride type, is lightweight and easy to manufacture, is easy to handle, and is less likely to cause accidents during boiling. It is extremely superior to conventional shutter-type bathtub lids.

[0022]

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a recyclable plastic shutter-type bathtub lid according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a partially enlarged plan view thereof.

FIG. 4 is a partially enlarged plan view thereof.

FIG. 5 is a rear view of the cap.

FIG. 6 is a side view of the cap.

[Explanation of symbols]

 1 Main Body 2 Bottom Plate 3 Cavity 4 Reinforcing Ribs 5 Joint Plate 6 Opening 7 Cap 8 Insert Piece

Claims (1)

[Claims] 1. A resin composition obtained by mixing 95 to 70 parts by weight of a halogen-free polypropylene resin or polystyrene resin and 5 to 30 parts by weight of an inorganic filler is extruded under heating and is flat over the longitudinal direction. The flat tube-shaped main body 1 having the bottom plate portion 2 is arranged in parallel in the lateral direction at a predetermined interval so that the long sides thereof are not in contact with each other, and the bottom plate portion 2 between the main bodies 1 is formed into a ribbon shape. A recyclable plastic shutter-type bathtub lid characterized in that it is connected by a joint plate 5 made of soft synthetic resin, and further, both end openings 6 of the main body 1 are closed by caps 7 made of synthetic resin.