JP2003191279A - Plastic molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform the quality control of a plastic molded article molded by sandwich molding using a recycled resin material in a core layer while using a virgin material in a skin layer. <P>SOLUTION: The plastic molded article 1 is molded by sandwich molding using a recycled resin material obtained from an once processed plastic part in a core material while using a virgin material in a skin material. A display part 2 displaying at least the weight ratio of the core material is provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic molded product used in a copying machine, a facsimile, a printer, a personal computer, a television, a video device and the like.

[0002]

2. Description of the Related Art Since plastic parts can be easily molded into a desired shape by injection molding or the like, in recent years, they have been used in various devices such as casings of copying machines and personal computers, automobile bumpers and dashboards. It is used a lot. And, when these devices are used up, it is not preferable to treat the used plastic parts as waste as they are because of environmental problems. Construction of a recycling system that returns to a resin material and reuses such a resin material (hereinafter referred to as "recycled resin material") for molding of plastic parts is promoted.

Here, once the resin material is molded into a plastic part, there is a concern that impurities may be mixed in and the physical properties may be deteriorated due to the heat history during molding, the environment used as a product or a part, and the like. Therefore, as one of the methods of molding a plastic part made of recycled resin material with performance equivalent to that of a plastic part molded using an unused new resin material (hereinafter referred to as "virgin resin material"), A predetermined amount of a new resin material or an additive is added to the recycled resin material crushed as disclosed in Kaihei 5-301222, etc., and the recycled resin material and the virgin resin material are mixed and melted, A method for producing recycled pellets for molding new plastic parts has been proposed.

Further, as one of the techniques for preventing the appearance defect and the physical property defect due to the use of a recycled material, a multilayer laminated molded article including a skin layer made of a virgin material and a core layer made of a recycled material is formed by sandwich molding. There is a way to deal with it.

[0005]

However, the recycled resin material obtained by crushing and washing the sandwich molded parts recovered from the market to remove impurities to a predetermined level is reused as a core material having desired physical properties. It is difficult to know whether it can be used for sandwich molding, and as a result, the physical properties of sandwich molded parts using such recycled resin materials as core materials vary. In addition, there is a concern that the quality such as strength and color cannot be maintained.

[0006] Therefore, the present invention has been made in view of the above problems, and an object thereof is to control the quality of a molded product which is sandwich-formed by using a recycled resin material for a core layer and a virgin material for a skin layer. It is to provide a plastic molded product that can be easily manufactured.

[0007]

[Means for Solving the Problems]
In order to achieve the object, the plastic molded product according to the present invention is sandwiched by using a recycled resin material obtained from once processed plastic parts as a core material and an unused virgin resin material as a skin material. The molded plastic molded article is characterized by having a display portion displaying at least the weight ratio of the core material.

Further, the plastic molded article according to the present invention is characterized in that grade names of the skin material and the core material are displayed on the display portion.

Further, in the plastic molded product according to the present invention, the core material is made of a recycled resin material, or the number of times of recycling the resin material used for the core material is displayed.

Further, in the plastic molded product according to the present invention, the value or range of the weight ratio of the core material is displayed by a symbol associated with the core material in advance.

Further, the plastic molded article according to the present invention is characterized in that the manufacturing lot number of the core material is displayed on the display portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below.

First, the outline of this embodiment will be described.

The first feature of the present embodiment is that the resin material obtained from the plastic parts recovered from the processing step or the market is used as the core material, and the virgin resin material is used as the skin material for sandwich molding. A plastic part is to have a display section for displaying the weight ratio of the core material.

In this structure, since the weight ratio of the core material is displayed on the display portion, a material for judging the tendency of deterioration of physical properties over time can be obtained. Therefore, this plastic part is again collected from the market and crushed / washed / It is possible to easily grasp the weight ratio that can be used when the core material is reused as a recycled material through the step of removing impurities.

The second feature of this embodiment is that the grade names of the skin material and the core material are displayed on the display section.

In this structure, the general material name or grade name of the skin material and the general material name or grade name of the core material are displayed on the display portion in addition to the weight ratio of the core material, whereby the tendency of physical property deterioration with time is shown. Since it is possible to obtain the judgment material, it is easier to grasp the weight ratio that can be used when this plastic part is collected from the market again, and is crushed / washed / impurity removed and used again as the core material as recycled material. You can

The third feature of this embodiment is that the core material is a recycled material or that the number of times of recycling is also displayed.

In this structure, by indicating that the core material is a recycled material or displaying the number of times of recycling together, it is possible to determine whether the recycled resin material is used in the impurity removal step in the manufacturing process (crushing / washing / removal of impurities). It can be used as a judgment material such as raising the impurity removal level.
Therefore, it is possible to easily grasp the weight ratio that can be used when the plastic parts are recovered from the market again and undergo the steps of crushing / washing / removing impurities to be reused as core materials as recycled materials.

The fourth feature of this embodiment is that a predetermined value or a predetermined range of the weight ratio of the core material is displayed by a symbol associated with the core material in advance.

In this structure, by displaying the weight ratio of the core material with a previously associated symbol, this plastic part is recovered from the market again, crushed / washed / impurity removed, and recycled as a core material. When used as, it can be divided into groups according to deterioration characteristics over time, and by classifying plastic parts having substantially the same physical property deterioration level, the usable weight ratio can be easily grasped.

The fifth feature of this embodiment is that the manufacturing lot number of the core material is displayed on the display section.

In this structure, by displaying the manufacturing lot number of the core material on the display unit, the manufacturing process of the core material and the physical properties at the time of manufacturing can be confirmed, and it can be used as reference information for deterioration of physical properties over time. It is possible to easily grasp the weight ratio that can be used when the plastic parts are collected from the market again and undergo the steps of crushing / washing / removal of impurities to be reused as core materials as recycled materials.

Embodiments of the present invention will be specifically described below with reference to the drawings.

(First Embodiment) FIG. 1 is a view showing a first embodiment of the plastic component of the present invention.

In FIG. 1, reference numeral 1 is a sandwich-molded plastic part which is a part of the exterior cover of the copying machine. On the back side of the plastic part 1, there is provided a display part 2 for displaying the name of the resin material used for molding and the like. The display part 2 serves as a model letter when the plastic part 1 is injection-molded. The parts 1 are simultaneously engraved.

FIG. 2 is a sectional view of the plastic part 1.

In FIG. 2, reference numeral 3 denotes a core layer, and 4 denotes a skin layer. For the core material 3a constituting the core layer 3, plastic parts recovered from the market are crushed / washed / impurity removed. The obtained recycled resin material is used, while the skin material 4a forming the skin layer 4 is manufactured using a virgin resin material.

As shown in FIG. 3, a general name 5 of the resin material constituting the plastic part 1 is displayed on the display portion 2, and in the case of this embodiment, it is clearly shown that it is PC + ABS resin. .

Further, the display part 2 has a plastic part 1
The weight ratio 6 of the core material 3a used in the core layer 3 composing the core layer 3 to the entire component is also shown. The weight ratio 6 indicates the weight ratio of the virgin resin material and the core material 3a which is the recycled resin material. To be able to grasp. In the example shown in FIG. 3, 30% of the core material 3a is contained in all the resin materials forming the plastic part.

Further, the display unit 2 displays the grade code 7 of the resin material of each of the core material 3a and the skin material 4a. In this embodiment, the skin material 4a is made of GE Plastics "PC + ABS" grade C6600, and the core material 3a is made of GE Plastics "PC + A".
It is clearly stated that it is using the grade "BS5" MC5400. This is because it is not possible to grasp the specific composition of the resin material, deterioration characteristics over time, etc. by displaying only the general name, and there is a concern that the quality cannot be maintained if the plastic parts 1 collected from the market are recycled. Therefore, the grade code 7 indicating the specific composition is the core material 3a.
And the skin materials 4a are displayed.

Further, the display unit 2 displays that the core material 3a is a recycled material or that the number of recycling times is 8. In this embodiment, it is indicated that the material that has been recycled once is used for the core material 3a. This is because there is a concern that predetermined physical properties may not be satisfied if the number of times of recycling is repeated. For example, the weight ratio of the core material may be reduced according to the number of times of recycling, or the impurity removal level may be increased in the impurity removal step of the recycled resin material manufacturing process (crushing / washing / removal of impurities). This is because.

The weight ratio of the core material 3a, which is a recycled resin material, may be indicated by a symbol. As an example of symbol display, the standard weight ratio is “M” below.
A case will be described in which the increase / decrease of a predetermined ratio with respect to the reference weight ratio is displayed as “+” and “−”.

When the standard weight ratio is set to 25%, "M" when the recycled resin material is contained by 25%, "M--" when it is contained by 15%, 20
When it is included in%, "M-" is displayed, and when it is included in 30%, "M +" is displayed. Here, the increase / decrease of the predetermined ratio is displayed as "+" and "-", and the range of "+" and "-" of the increase / decrease is set within the range of 5% with respect to the reference, respectively. The range may be widened or narrowed to be divided into groups depending on the deterioration characteristics over time.

Further, the manufacturing lot number 9 of the core material is displayed on the display section 2. The manufacturing lot number 9 includes information such as a manufacturing factory, a manufacturing date, a manufacturing process, etc., and the manufacturing process of the core material and the physical property information at the time of manufacturing can be confirmed by this manufacturing lot number. The physical property information at the time of manufacture serves as reference information for deterioration of physical properties over time.

In this way, the weight ratio of the core material 3a, which is the recycled resin material, to the plastic part 1 sandwich-molded by using the recycled resin material as the core material,
By displaying the grade of the core material and the skin material, the number of times of recycling, the manufacturing lot number of the core material and the skin material, the recycling obtained by crushing / washing / removing impurities of the plastic part 1 is taken into consideration When using a resin material as a core material for sandwich molding, compare how much (weight ratio) should be used to obtain the desired physical properties with databases such as a database of aging characteristics peculiar to each resin material grade. Can be easily grasped.

(Second Embodiment) In the above-described first embodiment, an example has been described in which the display portion 2 is simultaneously engraved as a model letter when the plastic part 1 is injection molded. The marking method of the display part is not limited to such a method, and a part or all of the display part may be, for example, a label that does not adversely affect the recycled use of the plastic part (compatible with the plastic part, easy to peel off). Etc.), printing with an easily removable ink or paint, or laser engraving with a laser processing device.

(Third Embodiment) In the case where the core material is composed of a plurality of grades or a recovered material of a sandwich molded product, the constituent grade 10 and the weight ratio of the core material are 1
1 may be written together as shown in FIG. Further, as shown in FIG. 4, it may be indicated by a symbol such as "SW" that the core material is a recovered material of the sandwich molded product.

As described above, according to the above-described embodiment, since the weight ratio of the core material is displayed on the display portion, it is possible to obtain a material for judging the tendency of deterioration of physical properties over time.
This plastic part can be recovered from the market again, and can be crushed / washed / impurity removed to be used as a recycled material to easily understand the weight ratio that can be used as a core material. It is possible to provide a plastic molded product that enables easy quality control of the sandwich molded product.

Further, in addition to the weight ratio of the core material, the general material name or grade name of the skin material and the general material name or grade name of the core material are displayed on the display portion to obtain a material for judging the tendency of deterioration of physical properties over time. Therefore, it is possible to collect the plastic parts from the market again and go through the steps of crushing / washing / removing impurities to re-use the recycled resin material as the recycled material, and to easily understand the weight ratio that can be used. It is possible to provide a plastic molded product that enables easy quality control of a sandwich molded product that is used.

In addition, the fact that the core material is a recycled material or the number of times of recycling is also displayed, so that the impurity removal level in the impurity removal step in the recycled resin material manufacturing process (crushing / washing / removal of impurities) is shown. It can be used as a judgment material such as raising. In addition, this plastic part can be recovered from the market again, and can be crushed / washed / removed to remove impurities, and the weight ratio that can be used when it is used as a core material again as a recycled material can be easily grasped. It is possible to provide a plastic molded product that can easily perform quality control of a sandwich molded product using the.

Further, by displaying the weight ratio of the core material by a previously associated symbol, this plastic part is again collected from the market and is used as a recycled material again as a recycled material after the steps of crushing / washing / removing impurities. At this time, it is possible to divide into groups according to deterioration characteristics over time, and by classifying plastic parts having substantially the same physical property deterioration level, it is possible to easily grasp the usable weight ratio. As a result, it is possible to provide a plastic molded product that can easily perform quality control of a sandwich molded product using a recycled resin material.

Further, by displaying the manufacturing lot number of the core material on the display portion, the manufacturing process of the core material and the physical properties at the time of manufacturing can be confirmed, and it becomes the reference information of the deterioration of physical properties with time. Collect and crush / wash /
It is possible to easily grasp the weight ratio that can be used as a core material again as a recycled material through the process of removing impurities, and it is possible to easily control the quality of sandwich molded products using recycled resin materials. It is possible to provide various plastic molded products.

[0044]

As described above, according to the present invention, it is possible to easily perform quality control of a molded product sandwich-molded by using a recycled resin material for the core layer and a virgin material for the skin layer. Becomes

[Brief description of drawings]

FIG. 1 is a perspective view showing a plastic part according to a first embodiment of the present invention.

2 is a cross-sectional view of the plastic component shown in FIG.

FIG. 3 is an enlarged view showing a display portion of a plastic part.

FIG. 4 is an enlarged view showing another example of the display part of the plastic part.

[Explanation of symbols]

1 plastic parts 2 Display 3 core layers 3a core material 4 skin layers 4a Skin material 5 General name of resin material Weight ratio of 6 core materials 7 Resin material grade code 8 recycling times 9 Manufacturing lot number of core material 10 Core material grade code 11 Weight ratio of core material

Claims (5)

[Claims] 1. A plastic molded product that is sandwich-molded by using a recycled resin material obtained from a plastic part that has been processed once as a core material and an unused virgin resin material as a skin material, and at least the core. A plastic molded article having a display portion on which a weight ratio of materials is displayed. 2. The plastic molded product according to claim 1, wherein grade names of the skin material and the core material are displayed on the display portion. 3. The plastic molded product according to claim 1, wherein the core material is made of a recycled resin material, or the number of times the resin material used for the core material is recycled is displayed. 4. The plastic molded product according to claim 1, wherein the value or range of the weight ratio of the core material is indicated by a symbol associated with the core material in advance. 5. The plastic molded product according to claim 1, wherein a manufacturing lot number of the core material is displayed on the display unit.