KR101838185B1 - Composite material for molding including lacquer, manufacturing method thereof and molded article - Google Patents

Abstract

The present invention relates to a molding composite material coated with a coating film comprising lacquer and rubber on the surface of a plastic molding material selected from a pellet shape, a powder shape, and a mixture thereof; a manufacturing method of the composite material; and a molded article using the composite material. According to the present invention, the flexibility and kneadability of lacquer can be improved, and thus, by using the molding composite material, a plastic molded article having the advantage of lacquer such as antibacterial properties, durability, water resistance, heat resistance, deodorization properties, contamination resistance, etc. and at the same time, having excellent physical strength can be provided; and product defects caused by poor dispersibility of lacquer can also be solved.

Description

TECHNICAL FIELD [0001] The present invention relates to a composite material for molding including lacquer, a method for producing the same, and a molded article produced using the composite material,

The present invention relates to a molding composite material comprising a varnish, a manufacturing method thereof, and a molded article produced using the composite material, and more particularly, to a molding compound To a method of manufacturing the same, and to a molded article having excellent physical strength which is produced by using the composite material.

Rhus verniciflua or Rhus vernicifera ) is a deciduous arboreous tree belonging to Anacardiaceae. It is originated from the Central Asian Highlands and Himalayas. It is widely distributed in the subtropical and temperate regions, mainly in the tropics. In the Southeast Asian regions such as Korea, Japan and China It is mainly grown for obtaining chilled liquid.

It is well known that when lacquer is applied using lacquer obtained from a lacquer and dried under proper conditions, superior characteristics such as antimicrobial activity, durability, water resistance, heat resistance, deodorizing property and stain resistance can be imparted and the preservability is improved. Therefore, the lacquer has been applied to wood or paper for a long time, and it has been used in large quantities for manufacturing daily necessities such as chests, bowls, cutlery, and statues. The use of traditional lacquer made it possible to preserve it for a long period of time.

There has been a continuous study on a method of applying lacquer having such excellent advantages to plastics.

As such a conventional method, there has been attempted a method in which a lacquer is directly applied on a plastic plate by screen coating or a spraying method, or a primer is applied on a plastic plate for drying and dried, followed by lacquering.

However, according to the above method, there is a disadvantage that the adhesion between the lacquer and the plastic is reduced and durability is lowered, the product is deformed during the drying process or the drying time is long, and it is difficult to apply the product to a product having a complicated shape.

As another method of applying lacquer to plastics, a method of mixing lacquer powder with a plastics resin which has been impregnated is used. As a method of making such a lacquer powder, there is a method of coating a lacquer or a lacquer with a small amount of plastics in a plate form, drying and mechanically crushing the lacquer powder into small lacquer powder, spraying it as high pressure air, A method of making lacquer powder, a method of dispersing the powder into water and dispersing it in a small amount of water, and then pulverizing the obtained powder by removing moisture.

For example, Patent Literature 1 (Korean Patent Registration No. 10-1404019) discloses a method of mixing a green lacquer in a liquid state using a stirrer, a step of mixing the liquid raw lacquer stirred in the stirring step in a predetermined range of thickness A step of drying the green lacquer contained in the flat plate in the flattening step, a step of pulverizing the lacquer dried in the drying step into a powder, and a step of pulverizing the powdered lacquer powder in the pulverizing step, And an application step of applying the composition to an area to be lacquered by mixing it with an adhesive.

However, when using the above methods, it is disadvantageous in that the powder is difficult to be pulverized and the yield is low, resulting in economical and technical limitations and thus impracticality.

On the other hand, Patent Document 2 (Japanese Patent Laid-Open Publication No. 10-2013-0081884) discloses a method in which lacquer is mixed with a plastic resin and extruded through an extruder, and then a master batch is formed and used in injection molding. However, due to the hardening of the lacquer, the yield of the process of making the lacquer masterbatch is low, resulting in problems of economical efficiency and technical properties.

Specifically, the lacquer is changed into a hardening material during the drying process. The hardened lacquer is not flexible and has a defect that is easily broken, broken and broken when it is bent or impacted. In the case of traditional wood wares, defects are often found in which the lacquer finish interface is easily broken and broken by the impact. In particular, when the lacquer is used in a plastic, the flexibility and kneadability of the lacquer may be extremely lowered due to the hardenability of the lacquer. Therefore, when a plastic molded article is produced by extruding, injection molding or press molding the lacquer masterbatch as in Patent Document 2, or directly mixing the lacquer with the plastic resin, the physical strength is lowered due to the flexibility problem of the lacquer, , And nonuniformly dispersed lacquer may cause stains or partial defects in the product.

Patent Document 1: Korean Patent Registration No. 10-1404019 Patent Document 2: Korean Patent Laid-Open Publication No. 10-2013-0081884

Disclosed is a composite material for molding which is improved in flexibility and kneading property by coating a coating film containing a rubber component together with lacquer on the surface of a plastic molding material, and a method for producing the same.

The present invention also aims to provide a molded article having excellent physical strength which is produced by using the above-mentioned composite material.

In order to solve the above-mentioned problems, the present invention provides a molding composite material coated with a coating film containing lacquer and rubber on the surface of a plastic molding material selected from a pellet shape, a powder shape, and a mixture thereof.

The coating film may be formed by applying a mixture of liquid lacquer and liquid rubber to the surface of the plastic molding material, followed by drying, and the coating film may further include a coloring agent.

As the plastic molding material, a thermoplastic resin or a thermosetting prepolymer may be used.

The present invention also relates to a method for manufacturing a liquid lacquer, comprising: a mixing step of mixing liquid lacquer and liquid rubber with stirring; An applying step of adding the mixed liquid obtained in the mixing step to a plastic molding material selected from a pellet form, a powder form and a mixed form thereof, and stirring the resultant to coat the surface of the molding material with the mixed liquid; And a drying step of drying the molding material that has been subjected to the coating step to form a coating film on the surface of the molding material.

Wherein the mixing step comprises: a first mixing step of adding a liquid rubber to the liquid lacquer and stirring the mixture at a stirring speed of 10 to 30 rpm for 10 to 60 minutes; and a mixing step of mixing the mixture obtained through the first mixing step at a stirring speed of 100 to 500 rpm Lt; / RTI > for 30 minutes.

In the mixing step, the liquid lacquer may be added in an amount of 80 to 99.95 wt%, and the liquid rubber may be added in an amount of 0.05 to 20 wt%.

In the mixing step, the colorant may be further added, and the content of the colorant is preferably 5 to 30 parts by weight based on 100 parts by weight of the liquid lacquer and the liquid rubber.

And heating the plastic molding material to a temperature below the melting point to remove moisture before the application step.

In the applying step, the mixed liquid is preferably added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the molding material, and the stirring to be performed may be carried out at a temperature of 15 to 80 ° C.

The drying step is a low-temperature drying method performed at a relative humidity of 40 to 80% at a drying temperature of 18 to 30 ° C for 12 to 48 hours and a drying at a drying temperature of 80 to 300 ° C for 3 minutes to 12 hours, High temperature drying method, or a combination of the two methods.

The mixing step, the application step and the drying step may be repeated one to five times.

Further, the present invention provides a molded article formed by using the above-mentioned molding composite material.

The molding may be selected from injection molding, extrusion molding, and press molding, and the molding composite material may be mixed with a plastic molding material not containing lacquer during molding.

According to the present invention, flexibility and kneadability of lacquer can be improved by providing a composite material for molding in which a coating film containing a rubber component together with lacquer is coated on the surface of a plastic molding material.

Accordingly, it is possible to provide a molded plastic article having excellent physical strength while having the advantages of lacquer such as antimicrobial property, durability, water resistance, heat resistance, deodorization property, stain resistance and the like by using the molding composite material, Can also solve the problem of product defects.

Fig. 1 shows a cross-sectional view of a coated film-coated pellet prepared according to Example 1 of the present invention.
Fig. 2 is a photograph of a molded article molded using a molding material manufactured in accordance with Embodiment 3 of the present invention. Fig.
3 schematically shows a cross-sectional view of the molding materials used in Example 4 of the present invention.
4 schematically shows a cross-sectional view of the molding materials used in Example 5 of the present invention.

TECHNICAL FIELD The present invention relates to a molding composite material comprising lacquer, a method for producing the same, and a molded article produced using the composite material.

First, the molding composite material according to the present invention will be described below.

The molding composite material is formed by coating a coating film containing lacquer and rubber on the surface of a plastic molding material selected from a pellet shape, a powder shape, and a mixture thereof.

Referring to FIG. 1, a cross-sectional view of a molding composite material 100 in which a coating film 120 is coated on the surface of a plastic molding material 110 in the form of pellets according to Embodiment 1 of the present invention is schematically shown.

In general, a coating film means a solid coating obtained by coating and drying a coating. In the present invention, a coating film can be formed by applying a mixture liquid of liquid rubber and a liquid rubber to the surface of the plastic molding material, followed by drying.

When the liquid rubber is mixed with the liquid lacquer, the lacquer can be obtained which improves the elasticity and stretchability, which is a defect of the traditional lacquer. Particularly, in the present invention, since the lacquer coating film containing rubber component is formed on the skin portion of each plastic molding material in the form of pellet or powder, and the molding material for molding thus formed can be extruded, injection molded or press molded , The dispersibility of lacquer can be improved. Further, the liquid rubber used for forming the coating film solves the problem of flexibility caused by the curing property of lacquer, so that the physical strength of the molded product can be improved.

The liquid lacquer may be selected from raw lacquer, purified lacquer, and mixtures thereof. Here, the raw lacquer refers to the state in which the impurities of the lacquer collected from the lacquer tree are removed, and the purified lacquer refers to the lacquer which has been processed to suit the purpose of the raw lacquer or to enhance the function thereof by chemical reaction.

The liquid rubber may be any one or more selected from the group consisting of natural latex, synthetic liquid rubber, depolymerized rubber and dissolved synthetic rubber. The liquid rubber is preferably an oligomer having a molecular weight of 500 to 3,000, and when the molecular weight is within the above range, it is most preferable for improving the flexibility of the varnish.

The coating film may further contain a coloring agent. By controlling the color or content of the coloring agent and the size of the plastic molding material coated with the coating film containing the coloring agent, a beautiful lacquer-containing plastic product having various colors or surface patterns can be obtained have.

The plastic molding material used in the molding composite material of the present invention may be a thermoplastic resin or a thermosetting prepolymer.

Examples of the thermoplastic resin include polyethylene (PE), polypropylene (PP), acrylonitrile butadiene styrene (ABS), polymethyl methacrylate (PMMA) One or more selected from the group consisting of high impact polystyrene (HIPS), thermoplastic-olefin (TPO), nylon, thermoplastic elastomer (TPE) .

As the thermosetting prepolymer, any one or two or more selected from the group consisting of polyester-based and polyether-based polyurethane oligomers, polyols and polyisocyanates can be used. Specifically, it can be purchased that direct polymerization Examples of the polyester-based and polyether-based polyurethane oligomer or commercially available, the commercially available product is no beon's ^{ESTANE ® 5701 TPU, ESTANE ® 5703} TPU, ESTANE ® 5707 TPU, ESTANE Examples include ^® 5708 TPU, ESTANE ^® 5713 TPU, ESTANE ^® 5714 TPU, ESTANE ^® 5715 TPU, ESTANE ^® 5719 TPU or ESTANE ^® 5778 TPU. The kind of the polyol is not particularly limited, but examples of the polyol include polyethylene glycol polyol, polycaprolactone polyol, polyester polyol, polyether polyol, polyacrylic polyol or polycarbonate polyol diol. The kind of the polyisocyanate is not particularly limited, but a polymer obtained by polymerizing aliphatic and aromatic isocyanates can be used. More specific examples of the aliphatic diisocyanate include 1,4-tetramethylene diisocyanate, 1,6 Hexamethylene diisocyanate, 1,4-cyclohexyl diisocyanate, isophorone diisocyanate or?,? - xylylene diisocyanate, and examples of the aromatic polyisocyanate include 4,4'-diphenylmethane di Isocyanate, 1,3-phenylene diisocyanate or toluene diisocyanate.

Hereinafter, a method of manufacturing a composite material for molding according to the present invention will be described in detail.

(1) Mixing step

This step is a step of mixing liquid lacquer and liquid rubber with stirring.

Wherein the mixing step comprises: a first mixing step of adding a liquid rubber to the liquid lacquer and stirring the mixture at a stirring speed of 10 to 30 rpm for 10 to 60 minutes; and a mixing step of mixing the mixture obtained through the first mixing step at a stirring speed of 100 to 500 rpm Lt; / RTI > for 30 minutes. As described above, when the two-stage mixing process is performed, a mixed liquid in which the liquid rubber is more uniformly dispersed in the liquid-state lacquer can be obtained.

In the mixing step, the liquid lacquer is preferably added in an amount of 80 to 99.95 wt%, and the liquid rubber may be added in an amount of 0.05 to 20 wt%. When the content of the liquid rubber is less than 0.05 wt% However, when the content is more than 20% by weight, the content of lacquer is relatively reduced, which may lead to a somewhat lack of antimicrobial properties, durability, water resistance, heat resistance, deodorizing property and stain resistance, .

As used herein, liquid lacquer may be selected from natural lacquer, purified lacquer, and mixtures thereof. The liquid rubber may be any one or two selected from the group consisting of natural latex, synthetic liquid rubber, depolymerized rubber and dissolved synthetic rubber Or more. At this time, when latex is used as the liquid rubber, it is preferable to adjust the pH by adding a small amount of ammonia water in order to prevent the solidification of liquid lacquer.

In the mixing step, a coloring agent may be further added. As the coloring agent, any one or two or more selected from the group consisting of an inorganic pigment, an organic pigment, a dye and a pearl pigment may be used. In particular, when a molding compound containing a colorant is used for molding by a press method, it is possible to make a product having an outline pattern in the shape of a round and angular beautiful lacquer.

The content of the colorant is preferably 5 to 30 parts by weight based on 100 parts by weight of the liquid mixture of the liquid lacquer and the liquid rubber. By changing the content of the colorant within the above range, it is possible to control the color density of the varnish, thereby making it possible to produce a molding composite material having various colors. For example, when a composite material for molding of various colors is mixed and molded by a press method or the like, a product having various colors of a mosaic shape can be produced. As a result, it is possible to produce lacquer plastic products having various colors and excellent antimicrobial properties, durability, water resistance, heat resistance, deodorization, stain resistance and flexibility. Also, in order to make the outer surface pattern of various sizes, it is possible to make lacquer products with different sizes by mixing several sizes of molding composite materials.

(2) Application step

This step is a step of adding the mixed liquid obtained in the mixing step to a plastic molding material selected from a pellet form, a powder form and a mixed form thereof, and stirring the resultant to coat the surface of the molding material with the mixed liquid.

And heating the plastic molding material to a temperature below the melting point to remove moisture before the application step. Specifically, a plastic molding material is injected into a large-sized industrial oven or a large-sized mixer capable of controlling the temperature, and heated to a temperature below the melting point of the molding material depending on the type of molding material between 60 and 200 ° C. Can be removed. If moisture remains in the molding material, bubbles may be generated during molding and the physical strength of the molded article may deteriorate.

In the applying step, the mixed liquid is preferably added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the molding material. When the added amount is less than 0.1 parts by weight, it is difficult to exhibit the advantage of lacquer, The physical strength of the molded article may fall and it may easily break.

When the mixed liquid is added to the plastic molding material, the mixed liquid is poured into a mixer and agitated for a sufficient time, the mixture liquid is uniformly applied to the surface of each plastic molding material having a pellet or powder form. At this time, there are no particular limitations on the type of mixer that can be used, but various facilities such as a rotary mixer capable of adjusting the internal temperature and a low-speed mixer can be used.

The stirring in the application step is preferably carried out at a temperature of 15 to 80 캜. The thickness of the mixed liquid applied to the surface of the plastic molding material depends on the temperature inside the mixer. When the temperature is high, the thickness of the mixed liquid becomes thin, whereas when the temperature is low, the thickness of the mixed liquid becomes thick. Is preferably adjusted. The plastic molding material having completed the application of the mixed liquid is cooled at room temperature, and then dried and cured in "(3) drying step "

(3) Drying step

This step is a step of forming a coating film on the surface of the molding material by drying the molding material which has been subjected to the coating step.

The drying step is a low-temperature drying method performed at a relative humidity of 40 to 80% at a drying temperature of 18 to 30 ° C for 12 to 48 hours and a drying at a drying temperature of 80 to 300 ° C for 3 minutes to 12 hours, High temperature drying method, or a combination of the two methods. When this drying step is carried out, a molding composite material is obtained in which a surface of a plastic molding material is coated with a semi-hardened or hardened coating film.

In the case of the molded composite material thus obtained, since the coating film containing lacquer is formed on the surface of each plastic molding material in the form of pellets or powder, the dispersibility of lacquer can be improved when molding the plastic product, and the rubber component Which is a drawback of lacquer, can be improved.

In order to increase the content of lacquer in the above-described process for producing a molding composite, the mixing step, the applying step and the drying step may be repeated one to five times.

On the other hand, the present invention provides a molded article formed by using the above-mentioned composite material for molding. The molded article has excellent physical strength as a result of improved flexibility of lacquer while having the traditional advantages of lacquer such as antimicrobial property, durability, water resistance, heat resistance, deodorization property, stain resistance and the like. In addition, there is an advantage that there is no product defect due to poor dispersibility of lacquer.

The molding may be selected from injection molding, extrusion molding and press molding.

At this time, a molded article can be produced by using the composite material for molding according to the present invention and the plastic molding material not containing lacquer. For example, when a plastic molding material coated with a coating film to which a coloring agent is added is used as the molding composite material and a plastic molding material having no coating film is mixed with the plastic molding material, a portion having a surface pattern and a portion having no pattern This shape can be used to create a beautifully shaped product with a unique appearance. At the same time, the plastic molding material in which the coating film is not formed easily melts, thereby lowering the physical properties due to curing, thereby further increasing the physical strength of the product.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these embodiments.

Example  One

4 kg of raw lacquer is added to a low-speed mixer, 500 g of natural latex as a liquid rubber is added thereto while stirring at a stirring speed of 20 rpm, and the first mixing step of stirring at the same stirring speed for 30 minutes is carried out.

The mixed solution having passed through the primary mixing step was transferred to a high-speed stirrer, and the secondary mixing step in which stirring was carried out at a stirring speed of 150 rpm for 10 minutes was carried out.

50 kg of polypropylene pellets from which moisture has been removed in an oven at 100 캜 are prepared, and the prepared polypropylene pellets are put into a temperature-controllable rotary mixer. 3 kg of the mixed solution obtained through the second mixing step is introduced into the mixer, and the mixed solution is uniformly coated on the surface of the polypropylene pellet by stirring the mixer at a stirring speed of 20 rpm for 60 minutes while adjusting the internal temperature of the mixer to 50 캜.

Then, the polypropylene pellets coated with the mixed solution were dried at a relative humidity of 75% and a drying temperature of 23 캜 for 24 hours to prepare a composite material for coating with a coating film.

Example  2

The molding composite material prepared in Example 1 and polypropylene pellets in which moisture was removed in an oven at 100 ° C were mixed at a ratio of 1: 1 and used as a molding material.

Comparative Example  One

Polypropylene pellets from which moisture had been removed in an oven at 100 캜 were used as molding materials.

<Evaluation method>

The molding material of Example 1, the molding material of Example 2 and the molding of Comparative Example 1 were put into an injection molding machine (Toggle-type, dynamic pressure), and an injection pressure of 55 kg / cm &lt; 2 & Injection rate at an injection speed of 20 seconds and a cooling time of 20 seconds to prepare a specimen of 5 cm x 5 cm x 1 cm. The impact resistance was evaluated with the thus prepared specimens, and the results are shown in Table 1 below.

Impact resistance evaluation

The impact resistance was evaluated according to ASTM D 2794. When 1kg weight was dropped from 50cm above the surface of the specimen, it was observed whether or not crack occurred. When the specimen was cracked or damaged, it was evaluated as defective and when it was not, it was evaluated as good.

Example 1 Example 2 Comparative Example 1 Impact resistance Good Good Bad

Referring to Table 1, in Examples 1 and 2 in which a molded article was produced using the molding composite material according to the present invention, it was confirmed that the impact strength was better than that in Comparative Example 1, and the physical strength was improved .

In addition, in the case of the specimen injection-molded using the molding composite material of Example 1, apparent stains and defects were not found, indicating that the lacquer was uniformly dispersed.

Example  3

A composite material was prepared in the same manner as in Example 1 except that 500 g of a black pigment as a coloring agent was added in the primary mixing step, and this was used as a molding material.

Example  4

A composite material was prepared and used as a molding material in the same manner as in Example 3, except that the polypropylene pellets were 1 mm, 2 mm, 3 mm and 5 mm in diameter.

Example  5

The molding composite material prepared in Example 3 and the polypropylene pellets in which moisture was removed in an oven at 100 ° C were mixed at a ratio of 1: 1 and used as a molding material.

Appearance evaluation

The molding materials obtained according to Examples 3 to 5 were put into a press molding machine, molded at a temperature of 200 캜 at a pressing pressure of 20 kg / cm 2, and then cooled at room temperature for 120 seconds to produce a molded article.

Fig. 2 shows a molded article using the molding material of Example 3, and it can be confirmed that the color of the colored lacquer appears on the surface of the molded article.

3 is a schematic cross-sectional view of the molding materials used in Example 4. More specifically, the molding materials are coated on four kinds of pellets 310, 320, 330, and 340 having different diameters, And is formed in a coated shape. When the molding material is used, a molded article having various patterns having different sizes can be produced.

4 schematically shows a cross-sectional view of the molding materials used in Example 5. Specifically, the molding materials consist of coated pellets 410 and 430 and coated pellets 400 and 420 . When the molding material is used, a portion having a surface pattern and a portion having no pattern can be formed at the same time, so that a beautifully shaped molded article having a unique appearance can be manufactured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments but is to be construed as being limited only by the appended claims. Should be construed as being included in the scope of the present invention.

Claims (16)

On a surface of a thermoplastic resin molding material selected from a pellet form, a powder form and a mixed form thereof,
A coating liquid formed by coating a liquid mixture of liquid lacquer and liquid rubber and drying the coated coating,
Wherein the liquid rubber is an oligomer having a molecular weight of 500 to 3,000 and includes a latex as one constituent component. The method according to claim 1,
Wherein said liquid lacquer is selected from raw lacquer, purified lacquer, and mixtures thereof. delete The method according to claim 1,
Wherein the coating film further comprises a coloring agent. The method according to claim 1,
The thermoplastic resin molding material may be made of polyethylene (PE), polypropylene (PP), acrylonitrile butadiene styrene (ABS), and polymethyl methacrylate (PMMA). Or a combination thereof. Mixing a liquid mixture comprising 80 to 99.95% by weight of liquid lacquer and 0.05 to 20% by weight of liquid rubber and 5 to 30 parts by weight of a colorant based on 100 parts by weight of the mixture with stirring;
0.1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin molding material is added to the molding material and stirred to coat the surface of the molding material with the mixture solution; And
And a drying step of drying the molding material that has been subjected to the coating step to form a coating film on the surface of the molding material. The method according to claim 6,
Wherein the mixing step comprises a first mixing step of adding liquid rubber to the liquid lacquer and stirring at 10 to 60 rpm for 10 to 60 minutes at a stirring rate of 10 to 30 rpm,
And a second mixing step in which the mixed solution having been subjected to the primary mixing step is stirred at a high speed for 5 to 30 minutes at a stirring speed of 100 to 500 rpm. delete delete The method according to claim 6,
Further comprising the step of heating the thermoplastic resin molding material to a temperature below the melting point to remove moisture before the application step. The method according to claim 6,
Wherein the stirring in the application step is performed at a temperature of 15 to 80 캜. The method according to claim 6,
The drying step is a low-temperature drying method performed at a relative humidity of 40 to 80% at a drying temperature of 18 to 30 ° C for 12 to 48 hours and a drying at a drying temperature of 80 to 300 ° C for 3 minutes to 12 hours, And a high-temperature drying method, or a combination of the two methods. The method according to claim 6,
Wherein the mixing step, the applying step and the drying step are repeated 1 to 5 times. A molded article formed by using the composite material for molding according to any one of claims 1, 2, 4, and 5. 15. The method of claim 14,
Wherein the molding is selected from injection molding, extrusion molding and press molding. 15. The method of claim 14,
And a molded article obtained by mixing the molding composite material with a thermoplastic resin molding material not containing lacquer.

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