KR102465205B1 - Semitransparent thermoplastic resin composition for forming two-colored pattern, method for preparing semitransparent injection-molded products having two-colored pattern, and injection-molded products - Google Patents

Abstract

The present invention relates to a translucent thermoplastic resin composition embodying a dichroic pattern, a method for manufacturing a translucent injection molded article embodying a dichroic pattern, and an injection molded article manufactured therefrom, and more particularly, i) for injection molding at a melting temperature of 180 to 260° C. 95 to 99.9% by weight of the transparent resin and ii) 0.1 to 5% by weight of the toning resin for injection molding, but satisfying the following Equation 1, a heterogeneous pattern is realized during injection molding by non-uniform melting of the transparent resin and the toning resin It relates to a translucent thermoplastic resin composition capable of improving the phosphorus effect, a method for manufacturing an injection-molded article having a heterochromatic pattern including the same, and an injection-molded article manufactured therefrom.
[Equation 1]
30 ≤ T' _m - T _m ≤ 150
(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

Description

A semi-transparent thermoplastic resin composition implementing a bi-color pattern, a method for manufacturing a semi-transparent injection-molded article embodying a bi-color pattern, and an injection-molded article manufactured therefrom -COLORED PATTERN, AND INJECTION-MOLDED PRODUCTS}

The present invention relates to a translucent thermoplastic resin composition embodying a dichroic pattern, a method for manufacturing a translucent injection molded article embodying a dichroic pattern, and an injection-molded article, and more particularly, random on the surface by non-uniform melt mixing of a transparent resin and a toning resin It relates to a translucent molded article capable of improving the aesthetic effect of the translucent molded article by implementing a pattern, and a method for manufacturing the same.

Lighting modules are applied to automobiles and electronic products to have aesthetic effects as well as various purposes and functions. Recently, in order to give users a comfortable and aesthetic effect, there is an increasing number of attempts to use surface lighting ornaments in vehicles and electronic products that have the shape of a surface while the light is uniformly spread, and accordingly, in order to further improve the aesthetic characteristics There is an increasing demand for the development of translucent components.

In the case of conventional translucent lighting parts, in order to impart aesthetic properties, transparent parts were first injection molded and then a painting/plating process was used. In the case of attaching a film with a pattern, it is difficult to express various three-dimensional effects and gives a monotonous feeling, so the esthetic enhancement effect is not high.

In addition, in order to realize more diverse colors and patterns, a method of improving aesthetics through double or bi-color injection molding has been proposed, but this requires a special injection molding machine with two or more cylinders or a base There was a disadvantage in that the process was complicated and cumbersome as each of the resin and the toning resin were put into different inlets (hoppers).

Japanese Patent Laid-Open No. 2016-083873A Japanese Patent Application Laid-Open No. 2000-182416A

In order to solve the problems of the prior art as described above, the present invention includes two types of resins having different melting temperatures and a melting temperature difference within a specific range, and by non-uniform melt mixing of the two types of resins during injection molding. An object of the present invention is to provide a semi-transparent thermoplastic resin composition capable of improving the aesthetics of a product by implementing a dichroic pattern, a method for manufacturing a translucent injection-molded article having a dichroic pattern including the same, and an injection-molded article manufactured therefrom.

The above and other objects of the present invention can all be achieved by the present invention described below.

In order to achieve the above object, the present invention includes i) 95 to 99.9% by weight of a transparent resin for injection molding having a melting temperature of 200 to 260° C. and ii) 0.1 to 5% by weight of a toning resin for injection molding, the formula Provided is a translucent thermoplastic resin composition that implements a dichroic pattern, characterized in that it satisfies 1.

[Equation 1]

30 ≤ T' _m - T _m ≤ 150

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

In addition, the present invention includes the step of injecting the translucent thermoplastic resin composition in which the dichroic pattern is implemented, wherein the injection is performed using a single injection molding machine, and the dichroic pattern is translucent, characterized in that it satisfies the following Equation 4 A method for manufacturing an injection-molded article is provided.

[Equation 4]

T _m < T _p <T' _m

(The T _m is the melting temperature of the transparent resin, the T' _m is the melting temperature of the toning resin, and the T _p is the injection processing temperature.)

In addition, the present invention includes i) 95 to 99.9% by weight of a transparent resin for injection molding having a melting temperature of 200 to 260 ℃, and ii) 0.1 to 5% by weight of a toning resin for injection molding, which satisfies the following Equation 1, and the surface It provides a semi-transparent injection-molded article in which a dichroic pattern is implemented, characterized in that it has a fountain flow pattern or a dot pattern.

[Equation 1]

30 ≤ T' _m - T _m ≤ 150

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

According to the present invention, it is possible to implement a dichroic pattern on a translucent thermoplastic resin using a conventional single injection molding machine by a simple process compared to the prior art, which can contribute to the improvement of esthetics and productivity of the product.

In addition, the translucent injection molded article in which the dichroic pattern is implemented according to the present invention can be applied to lighting parts to provide not only a function as a lighting but also an aesthetic effect.

1 to 8 are photographs of injection-molded articles manufactured according to Examples 1 to 8 of the present invention, respectively, in which a dichroic pattern is implemented.
9 is a photograph showing a state in which a rear light source is irradiated to an injection-molded article manufactured according to an embodiment of the present invention.

Hereinafter, a semi-transparent thermoplastic resin composition embodying the dichroic pattern of the present disclosure, a method of manufacturing a translucent injection-molded article embodying the dichroic pattern including the same, and an injection-molded article manufactured therefrom will be described in detail.

The inventors of the present invention, after mixing a transparent resin with a low melting temperature and a toning resin with a high melting temperature in a certain ratio, and then performing injection molding at a processing temperature based on the transparent resin, a dichroic pattern is realized by a simple process by non-uniform melt mixing of the resin. It was confirmed that, based on this, the present invention was completed.

The translucent thermoplastic resin composition embodying the dichroic pattern of the present invention comprises i) 95 to 99.9 wt% of a transparent resin for injection molding having a melting temperature of 180 to 260 ° C, and ii) 0.1 to 5 wt% of a toning resin for injection molding, Equation 1

[Equation 1]

30 ≤ T' _m - T _m ≤ 150

(The T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.) is satisfied.

For example, the transparent resin and the toning resin may be characterized in that they satisfy Equation 2 below, and in this case, a continuous fountain flow pattern may be formed on the surface during injection molding.

[Equation 2]

30 ≤ T' _m - T _m ≤ 80

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

Specifically, when Equation 2 is satisfied, the transparent resin is completely melted during dichroic injection molding, and the toning resin is present in a semi-molten state, thereby forming a continuous fractional flow pattern on the surface of the semi-transparent injection product.

As another example, the transparent resin and the toning resin may be characterized in that they satisfy the following Equation 2-1, and in this case, a continuous fountain flow pattern on the surface of the semi-transparent injection product during injection molding is more naturally can be formed.

[Equation 2-1]

30 ≤ T' _m - T _m ≤ 50

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

As another example, the transparent resin and the toning resin may be characterized in that they satisfy the following Equation 3, and in this case, the melting temperature difference between the two resins is large, so that a discontinuous dot pattern may be formed. .

[Equation 3]

80 <T' _m - T _m ≤ 150

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

Specifically, when Equation 3 is satisfied, the transparent resin is completely melted during dichroic injection molding and the toning resin is in an unmelted state to form a discontinuous dot pattern, and in this case, the color and particle size distribution of the toning resin are intact It is expressed on the surface of semi-transparent injection products.

As another example, the transparent resin and the toning resin may be characterized in that they satisfy the following Equation 3-1, and in this case, a more natural non-continuous dot pattern may be formed on the surface of the semi-transparent injection product. have.

[Equation 3-1]

80 <T' _m - T _m ≤ 120

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

Hereinafter, the resin composition of the present disclosure will be described in detail for each component.

The transparent resin may have a melting temperature of, for example, 180 to 260 ℃, 200 to 260 ℃, 200 to 250 ℃, 200 to 240 ℃, or 200 to 230 ℃, within this range, a dichroic pattern is clearly implemented to give an aesthetic look. It can be used as a lighting component because it gives an effect and has translucent properties.

As used herein, transparent resin refers to a resin having a haze value of 2.5 or less or 2.0 or less, manufactured from an injection specimen having a thickness of 3 mm and measured according to ASTM D1003.

In addition, in the present description, the translucent resin includes a case of a resin recognized as a translucent resin by those skilled in the art, and means a resin that partially transmits light. It means a resin having a haze value of 2.5 or more, 5 or more, or 5-80.

The transparent resin is, for example, an aromatic vinyl compound-vinyl cyan compound copolymer within a melting temperature range of 180 to 260 ° C., a vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer, polystyrene, polycarbonate and polymethyl methacrylate. It may be one or more selected from, and it may be preferable to include an aromatic vinyl compound-vinyl cyan compound copolymer or a vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer in terms of semi-permeability and vivid dichroic pattern implementation.

The aromatic vinyl compound-vinyl cyan compound copolymer and the aromatic vinyl compound of the vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer may be, for example, at least one selected from styrene, α-methyl styrene, vinyltoluene, and chlorostyrene, Preferably, it may be styrene.

The vinyl cyan compound of the aromatic vinyl compound-vinyl cyan compound copolymer and the vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer may be, for example, at least one selected from acrylonitrile, methacrylonitrile, and ethacrylonitrile. , preferably acrylonitrile.

The conjugated diene of the vinyl cyanide compound-conjugated diene-aromatic vinyl compound copolymer may be, for example, a rubber polymer including at least one selected from 1,3-butadiene, isoprene, chloroprene, and piperylene, of which 1,3 -It may be desirable to be a rubber polymer comprising butadiene.

As a more specific example, the transparent resin may be at least one selected from a styrene-acrylonitrile copolymer or an acrylonitrile-butadiene-styrene copolymer, and in this case, a translucent injection molded article having a clearer dichroic pattern can be provided. .

The toning resin may be included, for example, in an amount of 0.1 to 5% by weight, 0.5 to 4% by weight, 1 to 3.5% by weight, 1.5 to 3% by weight, or 2 to 3% by weight, and the transmittance of the final product within this range is a lighting fixture It is suitable for use as a light source, and a unique pattern can be clearly realized to give an aesthetic effect.

In the present description, the toning resin means a resin capable of realizing a dichroic pattern according to the present invention because the color, brightness, and/or chroma are different from those of the above-described transparent resin.

The toning resin may include a base resin and, if necessary, a pigment.

The base resin may be, for example, an amorphous resin, such as polycarbonate, or a crystalline resin, such as polyamide, and it may also be possible to use an amorphous/crystalline mixed resin when it is desired to impart a more continuous pattern to the molded article.

As a specific example, the base resin may be polycarbonate, polyamide, polyarylene sulfide, or a mixed resin including two or more of these, preferably a polycarbonate/polyamide mixed resin or polyarylene sulfide. .

The polycarbonate/polyamide mixed resin may include, for example, 5 to 95% by weight of polycarbonate, 30 to 70% by weight or 40 to 60% by weight; and 5 to 95% by weight, 30 to 70% by weight, or 40 to 60% by weight of polyamide, and has the advantage of diversifying the implementation of the dichroic pattern within this range. In particular, polyamide plays a role of widening the processing temperature difference in addition to making it a translucent, that is, toning resin with a melting temperature of 260° C. or higher.

The toning resin is in an embodiment 40 to 60% by weight or 45 to 55% by weight of polycarbonate, 37 to 57% by weight or 42 to 52% by weight of polyamide, and 1 to 5% by weight or 2 to 4% by weight of a pigment It can be included, and there is an advantage in that it is easy to implement a different color pattern within this range.

The polycarbonate is not particularly limited as long as it is a type commonly used in the art, and may be appropriately selected and applied.

The polyamide is, for example, polycaprolactam (polyamide 6), polyamide 11, polyamide 12, polyamide 4,6, polyamide 4,8, polyamide 4,10, polyamide 4,12, polyamide 6 , 6, polyamide 6,9, polyamide 6,10, polyamide 6,12, polyamide 10,10, polyamide 12,12, polyamide 6I and polyamide 6T may be at least one selected from, and their It may be possible with copolymers.

The polyamide copolymer is, for example, polyamide 6T/6,6, polyamide 6T/6, polyamide 6/6,6, polyamide 6,6/6T/6I, polyamide-6T/2-MPMDT (2 -MPMD=2-methylpentamethylenediamine), polyamide 6/12, polyamide 6/11, polyamide 6,6/11, polyamide 6,6/12, polyamide 6/6,10, polyamide 6 , 6/6,10, polyamide 4,6/6, polyamide 6/6,6/6,10 may be at least one selected from the group consisting of polyamide 6 in terms of desired permeability and vivid dichroic pattern realization It may be best to do

The polyarylene sulfide is not particularly limited as long as it is a type commonly used in the art, and may preferably be polyphenylene sulfide.

The pigment may include, for example, aluminum metal in which a metallic color is implemented, carbon black in which a black pattern is implemented, or both.

The aluminum metal may be, for example, aluminum metal flakes, and when this is used as a pigment, a bright dichroic pattern may be realized.

The pigment may be included, for example, in an amount of 0.5 to 5% by weight, 0.5 to 3% by weight, 0.7 to 1.5% by weight, or 2.5 to 3.5% by weight with respect to the toning resin, and a translucent injection-molded article having a dichroic pattern within this range is can be manufactured.

For example, the pigment may be provided directly to the base resin or in the form of a master batch.

The translucent thermoplastic resin composition may be characterized in that it has a heterogeneous melting condition between the melting temperature (T _m) of the transparent resin and the melting temperature (T' _m ) of the toning resin.

In the present description, the non-uniform melting condition means that the transparent resin is completely melted, and the toning resin is in a semi-melted or unmelted state, and the melted or semi-melted state of the resin is determined by various methods such as differential scanning calorimetry (DSC). It is a fact of interest to those skilled in the art that it can be confirmed as

Specifically, when the toning resin is in a semi-melted state, a dichroic pattern is realized by the color and continuous flow of the toning resin, and when the toning resin is in an unmelted state, the dichroic pattern is realized by the color and particle size distribution of the toning resin. will become

Hereinafter, a method of manufacturing a translucent injection-molded article in which the dichroic pattern of the present disclosure is implemented will be described. The manufacturing method of the present disclosure is performed including the above-described thermoplastic resin composition, and all technical characteristics of the thermoplastic resin composition are shared, and overlapping description thereof will be omitted.

The method for producing a semi-transparent injection-molded article of the present disclosure includes the step of injecting the semi-transparent thermoplastic resin composition in which the above-described dichroic pattern is implemented, wherein the injection is performed using a single injection molding machine, and it may be characterized in that the following Equation 4 is satisfied have.

[Equation 4]

T _m < T _p <T' _m

(The T _m is the melting temperature of the transparent resin, the T' _m is the melting temperature of the toning resin, and the T _p is the injection processing temperature.)

As described above, the resin composition of the present base material is injected at a temperature satisfying Equation 4 so that a dichroic pattern can be realized by non-uniform melting mixing due to the difference in melting temperature of the transparent resin and the toning resin.

As a specific example, the injection may be characterized in that it satisfies the following Equation 5. In this case, the dichroic pattern due to the non-uniform melting mixing of the transparent resin and the toning resin is realized more clearly, and not only the function as lighting but also the aesthetics are improved. can be maximized.

[Equation 5]

T _m + 5℃ ≤ T _p ≤ T' _m - 5℃

(The T _m is the melting temperature of the transparent resin, the T' _m is the melting temperature of the toning resin, and the T _p is the injection processing temperature.)

As another example, the injection processing temperature may satisfy the following Equation 2-2, and in this case, the dichroic pattern due to the non-uniform fusion mixing of the transparent resin and the toning resin is realized more clearly, and not only the function as lighting but also the aesthetics This can be maximized.

[Equation 2-2]

T _m + 10℃ ≤ T _p ≤ T' _m - 10℃

The injection uses a single injection molding machine, and in the present description, the single injection molding machine means an injection molding machine including only one cylinder, a screw, and a hopper.

The injection-molded article manufactured according to the above-described method for manufacturing a translucent injection-molded article has a dichroic pattern due to non-uniform melting mixing of the transparent resin and the toning resin. The semi-transparent injection-molded article of the present disclosure is manufactured through the above-described method for manufacturing the semi-transparent thermoplastic resin composition and the semi-transparent injection-molded article, and shares technical characteristics therewith, and overlapping descriptions will be omitted.

The translucent injection-molded article embodying the dichroic pattern of the present description includes i) 95 to 99.9 wt% of a transparent resin for injection molding having a melting temperature of 180 to 260 ° C, and ii) 0.1 to 5 wt% of a toning resin for injection molding. Equation 1 is satisfied, and it may be characterized as having a fountain flow pattern or a dot pattern on the surface.

[Equation 1]

30 ≤ T' _m - T _m ≤ 150

(The above T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)

As a specific example, when the melting temperature difference between the transparent resin and the toning resin satisfies Equation 2 above, the molded article implements a fountain flow-shaped dichroic pattern, and in another example, the melting temperature difference between the transparent resin and the toning resin is When Equation 3 is satisfied, the molded article has a dot-shaped dichroic pattern.

Since the molded article of the present invention exhibits translucent properties, it can be used as lighting parts such as lighting lamp covers, and can provide an advantage of excellent aesthetics while being able to softly illuminate by implementing a different color pattern.

Hereinafter, preferred examples are presented to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it will be apparent to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention, It goes without saying that such variations and modifications fall within the scope of the appended claims.

First, the materials used in the following examples are as follows.

A) Transparent resin

A1) Styrene-acrylonitrile copolymer (SAN): LG Chem's 90HR product with a melting temperature of 180 to 210 °C was used.

B) toning resin

B1) PC: Polycarbonate (LG Chemical, LUPOY GP1000MU) having a melting temperature of 240 to 260 ℃ was used.

B2) PC/PA6: 50 wt% of polycarbonate (LG Chem, LUPOY GP1000MU), 47 wt% of polyamide 6, and 3 wt% of aluminum (Al Flake), and a melting temperature of 240 to 260 ° C. was used.

B3) Black PPS: Polyphenylene sulfide (LG Chemical, LUSEP GP5410) containing 1 wt% of carbon black and having a melting temperature of 305 to 330 °C was used.

B4) White PPS: Polyphenylene sulfide (LG Chemical, LUSEP GP5410) having a melting temperature of 305 to 330 °C was used.

However, B3) black PPS and B4) white PPS used in Example 8 were each used after grinding and separating the particle size with a mesh (0.8 mm).

[Example]

Examples 1 to 8

Each component was mixed with the composition and content shown in Table 1 below and put into the hopper of a single injection molding machine (Engel Victory, 150 tons) consisting of one heating cylinder, one screw and one hopper, and described in Table 1 After melting and kneading at a temperature, it was injected into a mold to prepare a semi-transparent injection molded article having a different color pattern.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 A1 99 99 96 98 98 98 99 95 B1 One - - - - - - - B2 - One 4 2 2 2 - - B3 - - - - - - One One B4 - - - - - - - 4 Molding temperature [℃] 200 200 200 240 260 200 200 200

(In Table 1, the content of each component is a weight % based on 100% by weight of the total content of each component.)

[Test Example]

The photos of the molded article in which the heterochromatic pattern is realized by injection molding under the composition and conditions shown in Table 1 are shown in FIGS. 1 to 8 below.

Referring to FIG. 1 according to Example 1, when using a SAN resin as a transparent resin and a PC resin as a toning resin, it was confirmed that the random haze flow pattern was finely implemented with a melting temperature difference within the range of 30 to 80 ° C. .

Referring to FIGS. 2 to 6 according to Examples 2 to 6, it can be seen that a fountain flow pattern is clearly formed on the molded article. In this case, it was confirmed that a continuous fractional flow pattern was implemented more clearly even if the melting temperature difference was within the range of 30 to 80 °C.

Comparing FIGS. 2 and 3 according to Examples 2 and 3, when the ratio of toning resin increases, it can be seen that the density of the pattern increases, and as the density of the pattern increases, the transmittance of the molded article decreases as a lighting component It may be desirable to control the ratio of the transparent resin to the toning resin within a certain range because the function of the resin may be lost.

In addition, comparing FIGS. 4 to 6 according to Examples 4 to 6, it can be seen that the strength of the pattern, ie, sharpness, decreases as the molding temperature increases. It can be judged that this is because the toning resin is more melted and dispersed as the molding temperature increases.

Referring to FIGS. 7 and 8 according to Examples 7 and 8, it can be seen that a dot pattern, not a fractional flow pattern, is implemented, which is a large difference in melting temperature between the transparent resin and the toning resin of 80° C. or more, so that the non-uniformity of the two resins It can be seen as the result of maximizing melting.

Specifically, FIG. 7 according to Example 7 corresponds to an example in which a dot pattern is implemented using a toning resin containing black polyphenylene sulfide, and FIG. 8 according to Example 8 is black and white polyphenylene sulfide. This photo corresponds to an example of realizing a dot pattern using a toning resin containing expression can be confirmed.

In addition, Figure 9 is a photograph taken by irradiating a rear light source on a molded article having a dichroic fountain flow pattern according to an embodiment of the present invention. As a result, it was confirmed that it can be utilized as a lighting component with excellent aesthetics.

On the other hand, in the industry, dyes of relatively low molecular weight other than aluminum flakes or carbon black are used to impart color to molded articles. Therefore, it was judged that it would not be suitable for realizing a dichroic pattern, so the experiment was not conducted on a composition containing a dye as a toning resin.

Claims (16)

i) 95 to 99.9 wt% of a transparent resin for injection molding having a melting temperature of 180 to 260 ° C, and ii) 0.1 to 5 wt% of a toning resin for injection molding,
Equation 1
[Equation 1]
30 ≤ T' _m - T _m ≤ 150
(The T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)
The group consisting of i) the transparent resin is an aromatic vinyl compound-vinyl cyan compound copolymer, a vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer, polystyrene, polycarbonate and polymethyl methacrylate within a melting temperature range of 180 to 260 ° C. At least one selected from
The toning resin is characterized in that it comprises polycarbonate, polyamide, polyarylene sulfide, or a mixed resin containing two or more of them.
A translucent thermoplastic resin composition implementing a dichroic pattern. The method of claim 1,
The i) transparent resin and ii) toning resin are represented by the following Equation 2
[Equation 2]
30 ≤ T' _m - T _m ≤ 80
(The T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)
A translucent thermoplastic resin composition implementing a dichroic pattern. The method of claim 1,
The i) transparent resin and ii) toning resin are represented by the following Equation 3
[Equation 3]
80 <T' _m - T _m ≤ 150
(The T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)
A translucent thermoplastic resin composition implementing a dichroic pattern. delete The method of claim 1,
The ii) toning resin, characterized in that it comprises a base resin and a pigment
A translucent thermoplastic resin composition implementing a dichroic pattern. 6. The method of claim 5,
The base resin is characterized in that an amorphous resin, a crystalline resin, or an amorphous / crystalline mixed resin
A translucent thermoplastic resin composition implementing a dichroic pattern. delete The method of claim 1,
The polyamide is characterized in that the polyamide 6
A translucent thermoplastic resin composition implementing a dichroic pattern. The method of claim 1,
The base resin is a polycarbonate / polyamide mixed resin, characterized in that
A translucent thermoplastic resin composition implementing a dichroic pattern. 10. The method of claim 9,
The polycarbonate/polyamide mixed resin comprises 5 to 95 wt% of polycarbonate and 5 to 95 wt% of polyamide
A translucent thermoplastic resin composition implementing a dichroic pattern. 6. The method of claim 5,
The pigment is characterized in that it comprises aluminum metal, carbon black, or both.
A translucent thermoplastic resin composition implementing a dichroic pattern. 6. The method of claim 5,
The pigment is characterized in that it contains 0.5 to 5% by weight based on the toning resin.
A translucent thermoplastic resin composition implementing a dichroic pattern. The method of claim 1,
The translucent thermoplastic resin composition is characterized in that it has a heterogeneous melting condition between the melting temperature (T _m) of the transparent resin and the melting temperature (T' _m ) of the toning resin
A translucent thermoplastic resin composition implementing a dichroic pattern. Including the step of injecting a semi-transparent thermoplastic resin composition in which the dichroic pattern of claim 1 is implemented,
The injection uses a single injection molding machine, and the following Equation 4
[Equation 4]
T _m < T _p <T' _m
(The T _m is the melting temperature of the transparent resin, the T' _m is the melting temperature of the toning resin, and the T _p is the injection processing temperature.)
A method of manufacturing a translucent injection-molded product in which a heterochromatic pattern is realized. 15. The method of claim 14,
The injection is Equation 5
[Equation 5]
T _m + 5℃ ≤ T _p ≤ T' _m - 5℃
(The T _m is the melting temperature of the transparent resin, the T' _m is the melting temperature of the toning resin, and the T _p is the injection processing temperature.)
A method of manufacturing a translucent injection-molded product in which a heterochromatic pattern is realized. i) 95 to 99.9 wt% of a transparent resin for injection molding having a melting temperature of 180 to 260 ° C, and ii) 0.1 to 5 wt% of a toning resin for injection molding,
Equation 1
[Equation 1]
30 ≤ T' _m - T _m ≤ 150
(The T _m is the melting temperature of the transparent resin, and the T' _m is the melting temperature of the toning resin.)
The group consisting of i) the transparent resin is an aromatic vinyl compound-vinyl cyan compound copolymer, a vinyl cyan compound-conjugated diene-aromatic vinyl compound copolymer, polystyrene, polycarbonate and polymethyl methacrylate within a melting temperature range of 180 to 260 ° C. At least one selected from
The toning resin includes polycarbonate, polyamide, polyarylene sulfide, or a mixed resin containing two or more of these,
Characterized in having a fountain flow pattern or dot pattern on the surface
A translucent injection molded product with a unique pattern.

Images