CN115418068A - Particle injection molding material, PMMA injection molding part with texture and preparation method thereof - Google Patents
Particle injection molding material, PMMA injection molding part with texture and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
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Abstract
The invention provides a particle injection molding material, a PMMA injection molding piece with texture and a preparation method thereof. The particle injection molding material comprises PMMA master batches, master batch particles A and master batch particles B, the volumes of the master batch particles A and the master batch particles B are respectively and independently 1/4-1/2 of the volume of the PMMA master batches, the mass ratio of the master batch particles A and the master batch particles B in the particle injection molding material is respectively and independently 0-0.5%, and is free of 0, the melting temperature of the master batch particles B is higher than that of the master batch particles A, and the melting temperature of the master batch particles A is higher than that of the PMMA master batches. In the process of preparing the injection molding part by the particle injection molding material provided by the invention, the color master batch particles B are not completely melted in the PMMA substrate to form a gap or a crack, and the color master batch particles A are partially melted in the PMMA substrate to generate a flow mark to form decorative textures, so that the unique aesthetic feeling of simulating natural flow and natural textures is presented, and the appearance image of the injection molding part is enriched.
Description
Technical Field
The invention relates to an injection molding material, in particular to a particle injection molding material, a PMMA injection molding piece with texture and a preparation method thereof.
Background
The rapid development of the urbanization process promotes people to move towards nature. People are used to the lusterless and noisy cities, and the trend of the cities to the natural environment is stronger. At present, natural style home decoration is formed quietly, devices with natural texture appearances are more popular with consumers, pure white appearance devices slowly fade out of the eyes of consumers, and natural wind comes in.
The existing device with the natural texture appearance is generally prepared by a printing mode, and raw materials contain pollutants such as VOC, benzene compounds, heavy metals and the like, so that a large amount of energy is consumed, and the realization of environmental protection, energy conservation and emission reduction is not facilitated.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention mainly aims to provide a particle injection molding material, a PMMA injection molding part with texture and a preparation method thereof, and aims to solve the problems that the existing device with natural texture appearance is prepared in a printing mode, contains pollutants in raw materials, consumes a large amount of energy, and is not beneficial to environmental protection and realization of energy conservation and emission reduction.
In order to achieve the above object, according to one aspect of the present invention, there is provided a pellet injection molding material comprising PMMA masterbatch, masterbatch particle a and masterbatch particle B, the volumes of masterbatch particle a and masterbatch particle B are each independently 1/4 to 1/2 of the volume of PMMA masterbatch, the mass ratios of masterbatch particle a and masterbatch particle B in the pellet injection molding material are each independently 0 to 0.5% and do not contain 0, the melting temperature of masterbatch particle B is higher than the melting temperature of masterbatch particle a, and the melting temperature of masterbatch particle a is higher than the melting temperature of PMMA masterbatch particle.
Further, the volume of the PMMA master batch is 15-25 mm 3 The volume of the color master batch particle A and the volume of the color master batch particle B are respectively and independently 3.75-12.5 mm 3 。
Furthermore, the volume of the PMMA master batch is 16-24 mm 3 And/or the volume of the color master batch particle A and the volume of the color master batch particle B are respectively and independently 4-12 mm 3 。
Further, the PMMA master batch is transparent, the color of the color master batch A is colorful, and the color of the color master batch B is white or grey white.
Further, the material of the PMMA master batch comprises first PMMA resin; the material of the color masterbatch particle A comprises a second PMMA resin, a first ABS resin and a first colorant, wherein the mass ratio of the second PMMA resin to the first ABS resin is as follows: 20-80%, wherein the mass ratio of the first colorant in the color master batch particles A is 3% -15%, the material of the color master batch particles B comprises a second ABS resin and a second colorant, and the mass ratio of the second colorant in the color master batch particles B is 3% -15%.
Further, the first colorant is green color master batch, and the second colorant is white color master batch.
Further, the PMMA master batch also comprises aluminum powder pigment or pearl powder pigment; and/or the material of the color master batch particle A also comprises an aluminum powder pigment or a pearl powder pigment; and/or the material of the color master batch particle B also comprises aluminum powder pigment or pearl powder pigment.
According to another aspect of the present invention, there is also provided a textured PMMA injection molded part, the material of the textured PMMA injection molded part being any one of the particulate injection molded materials provided by the first aspect above.
According to a third aspect of the present invention, there is also provided a method for preparing the above-described PMMA injection molded part with texture, the method comprising: step S1, mixing PMMA master batch, color master batch particles A and color master batch particles B to obtain a particle injection molding material; s2, drying and heating the particle injection molding material of the injection molding piece to melt the PMMA master batch, partially melting the color master batch particles A, and not melting the color master batch particles B to obtain the molten injection molding material; and S3, injection molding the molten injection molding material to obtain the PMMA injection molding part with the texture.
Further, in the step S2, the drying temperature is 80-90 ℃ and the drying time is 3-4 h.
Use the technical scheme of this application, the granule injection molding that this application provided, adopt the PMMA master batch, masterbatch A and masterbatch B are the raw materials, through controlling the volume, quantity and the melting temperature of masterbatch A and masterbatch B respectively, at the in-process of the PMMA injection molding that has the texture, masterbatch B does not melt in the PMMA substrate completely, form crack or crack, masterbatch A part melts in the PMMA substrate, produce the flow mark and form the unique aesthetic feeling that the decorative texture demonstrates simulation natural flow and natural texture, enrich the outward appearance image of injection molding. Compared with the traditional printing process, the method has more natural and various forms.
In addition, the granule injection molding material that this application provided forms the PMMA injection molding that has the texture through moulding plastics, not only do not contain in the raw materials VOC, pollutants such as benzene class compound and heavy metal, green, pollution-free production in the production process, the energy consumption of traditional printing processing production link has been eliminated moreover, be favorable to realizing energy saving and emission reduction and reduce cost and improve effect, compare in traditional printing technology simultaneously, have more natural grace and diversified form, the lacquer phenomenon can not appear falling, possess excellent practicality and durability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a photograph of a particle injection molded part according to example 1 of the present invention; and
fig. 2 shows a photograph of an injection molded part having a natural texture provided in example 1 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As analyzed by the background technology of the application, the existing device with the natural texture appearance is generally prepared by a printing mode, and the raw materials contain pollutants such as VOC, benzene compounds, heavy metals and the like, so that a large amount of energy can be consumed, and the problems of environmental protection, energy conservation and emission reduction are not facilitated. In order to solve the technical problem, the application provides a particle injection molding material, a PMMA injection molding piece with texture and a preparation method thereof.
In a first exemplary embodiment of the present application, a pellet injection molding material for injection molding with texture is provided, the pellet injection molding material comprises PMMA masterbatch, masterbatch particles a and B, the volume of the masterbatch particles a and B is 1/4-1/2 of the volume of the PMMA masterbatch, the mass ratio of the masterbatch particles a and B in the pellet injection molding material is 0-0.5% and is free of 0, the melting temperature of the masterbatch particles B is higher than the melting temperature of the masterbatch particles a, and the melting temperature of the masterbatch particles a is higher than the melting temperature of the PMMA masterbatch.
Use the technical scheme of this application, the granule injection molding that this application provided, adopt the PMMA master batch, masterbatch A and masterbatch B are the raw materials, through controlling the volume, quantity and the melting temperature of masterbatch A and masterbatch B respectively, at the in-process of the PMMA injection molding that has the texture, masterbatch B does not melt in the PMMA substrate completely, form crack or crack, masterbatch A part melts in the PMMA substrate, produce the flow mark and form the unique aesthetic feeling that the decorative texture demonstrates simulation natural flow and natural texture, enrich the outward appearance image of injection molding. Compared with the traditional printing process, the method has more natural and various forms.
In addition, the granule injection molding material that this application provided forms the PMMA injection molding that has the texture through moulding plastics, not only do not contain in the raw materials VOC, pollutants such as benzene class compound and heavy metal, green, pollution-free production in the production process, the energy consumption of traditional printing processing production link has been eliminated moreover, be favorable to realizing energy saving and emission reduction and reduce cost and improve effect, compare in traditional printing technology simultaneously, have more natural grace and diversified form, the lacquer phenomenon can not appear falling, possess excellent practicality and durability.
In the particle injection molding material, the melting temperature of the color master batch particles B is higher than that of the color master batch particles A, and the melting temperature of the color master batch particles A is higher than that of the PMMA master batch particles, so that when the particle injection molding material is subjected to injection molding, the PMMA master batch particles are melted to form a molten PMMA resin, the first color master batch particles are partially fused in the molten PMMA resin and are not completely melted to form a flow mark, the second color master batch particles are not completely melted and are dispersed in the molten PMMA resin in a granular form to form a gap or a crack, and further unique aesthetic texture is formed.
In the particle injection molding material, the volume of the color master batch particle A is related to the thickness of a flow mark, the volume of the color master batch particle B is related to the size of a gap or a crack, the smaller the color master batch particle A is, the easier the color master batch particle A is to melt, the finer the flow mark is, the smaller the color master batch particle B is, the smaller the formed gap or crack is, and the sizes of the common color master batch particle A and the color master batch particle B are far smaller than the size of a PMMA (polymethyl methacrylate) master batch, so that fine and flowing textures are further obtained.
In order to further improve the injection molding efficiency and the aesthetic sense of the texture, it is preferable that the volume of the PMMA master batch is 15 to 25mm 3 The volume of the color master batch particle A and the volume of the color master batch particle B are both 3.75-12.5 mm 3 Especially when the volume of PMMA master batch is 16-24 mm 3 The volume of the color master batch particles A and the volume of the color master batch particles B are both 4-12 mm 3 The efficiency of granule injection molding material preparation injection molding is higher, and the outward appearance is also more various, more rich in the aesthetic feeling.
In order to prepare the PMMA injection molding with jade green texture, the color of the PMMA master batch is preferably semitransparent, the color of the master batch particle A is green, and the color of the master batch particle B is white or offwhite.
Typically, but not by way of limitation, in the particulate injection molding compound provided herein, the volume of each of masterbatch particle A and masterbatch particle B is, independently, 1/4, 2/7, 1/3, 2/5, 1/2, or any two of the values forming the range of the volume of the PMMA masterbatch particle; the mass of the color master batch particles A and the color master batch particles B in the particle injection molding material is, for example, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5% or a range value formed by any two numerical values; the PMMA master batch has a volume of 15mm 3 、18mm 3 、20mm 3 、22mm 3 、25mm 3 Or any two numerical values; the volume of masterbatch particle A and masterbatch particle B are each independently, for example, 3.75mm 3 、4mm 3 、5mm 3 、8mm 3 、10mm 3 、12mm 3 、12.5mm 3 Or any two numerical values.
In some embodiments of the present application, the material of the PMMA master batch includes the first PMMA resin, and may further include a corresponding auxiliary agent. The color masterbatch particle A comprises a second PMMA resin, a first ABS resin and a first colorant, wherein the mass ratio of the second PMMA resin to the first ABS resin is 20-80-20, and the mass ratio of the first colorant in the PMMA masterbatch particle is 3% -5%; the material of the color masterbatch particle B comprises a second ABS resin and a second colorant, and the mass proportion of the second colorant in the color masterbatch particle B is 3-5%, so that an injection molding part with excellent mechanical properties and unique aesthetic texture can be obtained.
In order to further prepare the PMMA injection molding with jade green effect, the first colorant is preferably green color master, and the second colorant is preferably white color master.
In order to further improve the aesthetic property of the PMMA injection molding piece, the material of the PMMA master batch preferably also comprises aluminum powder pigment or pearl powder pigment; and/or the material of the color master batch particle A also comprises an aluminum powder pigment or a pearl powder pigment; and/or the material of the color master batch particles B also comprises aluminum powder pigment or pearl powder pigment. The use amounts of the aluminum powder pigment or the pearl powder pigment in the PMMA master batch, the color master batch particles A and the color master batch particles B are not limited, and are adjusted according to the requirements of the PMMA injection molding piece on the appearance.
In some embodiments of the present application, a method of preparing PMMA masterbatches comprises the steps of: the first PMMA resin, and optionally a colorless aid, are mixed and fed to an injection molding machine for melt granulation at a processing temperature of 220 ℃ to produce PMMA master batches having a size of 3.5mm by 3mm by 2mm, with a processing tolerance generally within ± 0.5 mm. The process flow is as follows: mixing the first PMMA resin and an optional colorless auxiliary agent → melting granulation → weighing → obtaining PMMA master batch.
The preparation method of the color master batch particle A comprises the following steps: and mixing the second PMMA resin, the first ABS resin and the green color master batch, adding the mixture into an injection molding machine for melt granulation, wherein the processing temperature is 230 ℃, and obtaining the color master batch particles A with the size of 1.5mm x 2.5mm and the processing error of +/-0.5 mm. The process flow is as follows: mixing the second PMMA resin, the first ABS resin and the green color master → melting granulation → weighing → obtaining color master batch particles A.
The preparation method of the color master batch particle B comprises the following steps: and mixing the second ABS resin with the white color masterbatch, adding the mixture into an injection molding machine for melt granulation, wherein the processing temperature is 240 ℃, and obtaining the color masterbatch particles B with the size of 1.5mm x 2.5mm and the processing error of +/-0.5 mm. The process flow is as follows: and (3) mixing a second ABS resin with a white color master batch → performing melt granulation → weighing → obtaining a color master batch B.
In a second exemplary embodiment of the present application, there is also provided a textured PMMA injection molded part, the material of which is a particulate injection molding compound of any one of the first exemplary embodiments described above.
The PMMA injection molding with texture that this application provided forms through granule injection molding, and masterbatch A part melts in PMMA resin and produces the flow mark and form the decoration texture, demonstrates the unique aesthetic feeling of simulation natural flow and natural texture, and masterbatch B does not melt and forms crack or trace gap in the PMMA resin, and then riches the outward appearance image of injection molding. Compared with the traditional printing process, the PMMA injection molding with the texture has more natural and various forms, does not have the phenomenon of paint falling, and has excellent practicability and durability.
In addition, the shape and structure of the textured injection molded part are not limited, and any injection molded part that can be obtained by injection molding may be used.
In a third exemplary embodiment of the present application, there is also provided a method of manufacturing the above-described PMMA injection-molded part with texture, the method comprising: and carrying out injection molding on the particle injection molding material to obtain the PMMA injection molding piece with the texture.
The preparation method of the PMMA injection molding with the texture, provided by the application, has the advantages that pollutants such as VOC, benzene compounds, heavy metals and the like are not introduced in the whole process, the green and environment-friendly effects are realized, no pollution is generated, the energy consumption of the traditional printing and processing production link is eliminated, and the energy conservation, emission reduction, cost reduction and efficiency improvement are facilitated.
In order to further reduce the defects of the PMMA injection molded parts, the production method of the preferably textured PMMA injection molded parts comprises the following steps: step S1, mixing PMMA master batch, color master batch particles A and color master batch particles B to obtain a particle injection molding material; s2, drying and heating the granular injection molding material to enable the PMMA master batch to be melted to form molten PMMA resin, wherein part of the PMMA master batch A is melted in the PMMA resin to form a natural texture flow mark, and the PMMA master batch B is dispersed in the PMMA resin in a granular shape to form a gap or a crack, so that the molten injection molding material is obtained; and S3, injection molding the molten injection molding material to obtain the textured injection molding part.
In the step S2, the particle injection molding material is dried and then heated and melted, so that the phenomenon that the moisture contained in the particle injection molding material generates bubbles in the injection molding process to influence the appearance of the PMMA injection molding part is avoided.
In order to further reduce the influence of bubbles on the appearance of the PMMA injection molded part, the drying temperature is preferably 80-90 ℃ for 3-4 h in the step S2.
In some embodiments of the present application, a PMMA injection molded part with a texture is prepared according to the following steps:
(1) Mixing and stirring PMMA master batch, color master batch particles A and color master batch particles B according to the weight to obtain a particle injection molding material;
(2) Drying the granular injection molding material at 80-90 ℃ for 3-4 h, putting the granular injection molding material into an injection molding machine for heating and melting to melt the PMMA master batch, partially melting the color master batch particles A in the PMMA resin, and dispersing the color master batch particles B in the PMMA resin in a granular manner to obtain a molten injection molding material;
(3) And (3) performing injection molding on the molten injection molding material at 220 ℃, cooling and shaping, and removing the injection molding material from the mold to obtain the injection molding part with the texture.
The advantageous effects of the present application will be described below with reference to examples and comparative examples.
Example 1
The embodiment provides an injection molding part with natural texture, which is formed by injection molding of a particle injection molding material, wherein the particle injection molding material comprises a PMMA master batch, a color master batch particle A and a color master batch particle B, the PMMA master batch has the size of 3.5mm × 3mm × 2mm, the melting temperature is 220 ℃, and the PMMA master batch is obtained by melting and granulating PMMA resin; the size of the color master batch particle B is 1.5mm 2.5mm, the processing temperature is 230 ℃, the color master batch particle B is obtained by mixing, melting and granulating PMMA resin, ABS resin and green color master batch, the mass content of the green color master batch in the color master batch particle A is 0.2%, and the mass ratio of the PMMA resin to the ABS resin is 50; the size of the color master batch particles B is 1.5mm x 2.5mm, the processing temperature is 240 ℃, the color master batch particles are obtained by mixing, melting and granulating ABS resin and white master batch, and the mass content of the white master batch in the second color master batch particles is 0.1%.
The preparation method of the PMMA injection molding piece with the texture comprises the following steps:
(1) Mixing and stirring PMMA master batch, color master batch particles A and color master batch particles B according to a mass ratio of 99.7;
(2) Drying the particle injection molding material at 80 ℃ for 4h, putting the particle injection molding material into an injection molding machine, and heating and melting the particle injection molding material at 220 ℃ to melt PMMA master batch to form molten PMMA resin, wherein part of the color master batch particles A is melted in the PMMA resin, and the color master batch particles B are dispersed in the PMMA resin in a granular shape to obtain the molten injection molding material;
(3) And (3) performing injection molding on the molten injection molding material at 220 ℃, cooling and shaping, and removing the injection molding material from the mold to obtain the injection molding part with natural texture.
Example 2
The difference between this example and example 1 is that the volume of the masterbatch particle A and masterbatch particle B is 1/2 of that of PMMA masterbatch particle, and the size is 2.8mm × 2.5mm × 1.5mm.
Example 3
The difference between this example and example 1 is that the volume of the masterbatch particle A and masterbatch particle B is 1/4 of that of PMMA masterbatch particle, and the size is 2.5mm multiplied by 1.5mm multiplied by 1.4mm.
Example 4
The difference between the present embodiment and embodiment 1 is that the mass ratio of the color masterbatch particle A in the pellet injection molding material is 0.01%.
Example 5
The difference between the present example and example 1 is that the mass ratio of the color master batch particle A in the particle injection molding material is 0.5%.
Example 6
The difference between the embodiment and the embodiment 1 is that the mass ratio of the color master batch particles B in the particle injection molding material is 0.01%.
Example 7
The difference between the present example and example 1 is that the mass ratio of the color master batch particles B in the pellet injection molding material is 0.5%.
Comparative example 1
The difference between the comparative example and example 1 is that the size of the masterbatch particle A and the size of the masterbatch particle B are both 1/8 of the size of the PMMA masterbatch particle.
Comparative example 2
The comparative example differs from example 1 in that the size of both masterbatch particle a and masterbatch particle B is the same as the PMMA masterbatch particle.
Comparative example 3
This comparative example differs from example 1 in that the size of the masterbatch particle B is 1/8 of the size of the PMMA masterbatch particle, which is 1.5mm by 1.4mm by 1.25mm.
Comparative example 4
This comparative example differs from example 1 in that the size of the color masterbatch particle B is the same as the size of the PMMA masterbatch particle.
Comparative example 5
The difference between the comparative example and the example 1 is that the mass ratio of the color master batch particles A in the injection molding granule is 2%.
Comparative example 6
The difference between the comparative example and the example 1 is that the mass percentage of the color master batch particles B in the injection molding granule is 1%.
Comparative example 7
The comparative example is different from example 1 in that the masterbatch particles A are obtained by mixing, melting and granulating PMMA resin and green masterbatch.
Comparative example 8
The difference between the comparative example and the example 1 is that the color master batch particle B is obtained by mixing, melting and granulating PMMA resin, ABS resin and white master batch, and the mass ratio of the PMMA resin to the ABS resin is the same as that of the master batch particle A.
Test example 1
The granular injection molding material in example 1 and the PMMA injection molded part with texture provided in example 1 are photographed, as shown in fig. 1 and fig. 2, fig. 1 is a photograph of the granular injection molding material in example 1, and it can be seen from fig. 1 that the granular injection molding material in example 1 is a mixed granule of transparent PMMA master batch, white color master batch particles and green color master batch particles, and the sizes of the green color master batch particles and the white color master batch particles are both significantly smaller than the size of the transparent PMMA master batch particles. As can be seen from fig. 2, the outer surface of the PMMA injection molded part has a decorative texture formed by green flow marks and white marks or crevices, presenting the unique aesthetic of a jade green texture.
Test example 2
(1) The 3.2mm notched impact strength of the injection-molded parts provided in the above examples and comparative examples was measured according to the ASTMS256 specification, and the results showed that the notched impact strength of the injection-molded parts provided in each example and comparative example was 400-420 kJ, which satisfied the use requirements.
(2) The outer surfaces of the injection molded parts provided in the above examples and comparative examples were visually observed to evaluate the density of white texture, the width of white texture, and the ground color of the injection molded parts, respectively, wherein the ground color refers to the ground color formed by the fusion of green masterbatch particles and PMMA masterbatch particles, and the results are shown in table 1 below.
Wherein the content of the first and second substances,
(a) The density of the white texture is divided into five grades of no obvious texture, rare texture, moderate texture, dense texture and dense texture (covering ground color);
(b) The width of the white texture is divided into five grades of no obvious texture, point-shaped texture, thin line texture, thick line texture and lump texture; (ii) a
(c) The ground color is as follows: six levels of color separation, almost primary colors, light fusion, moderate fusion, excessive fusion (no distinction between semi-transparent and green), and large color difference.
TABLE 1
| Density of white texture | Width of white texture | Ground color | Overall evaluation | |
| Example 1 | Moderate texture | Fine line texture | Moderate fusion | Ideal for |
| Example 2 | Moderate texture | Moderate texture | Moderate fusion | Is ideally of |
| Example 3 | Moderate texture | Fine line texture | Moderate fusion | Ideal for |
| Example 4 | Moderate texture | Fine line texture | Moderate fusion | Ideal for |
| Example 5 | Moderate texture | Moderate texture | Moderate fusion | Ideal for |
| Example 6 | Sparse texture | Fine line texture | Moderate fusion | Ideal for |
| Example 7 | Dense texture | Fine line texture | Moderate fusion | Ideal for |
| Comparative example 1 | Without obvious texture | Without obvious texture | Excessive fusion | Is not ideal |
| Comparative example 2 | Sparse texture | Texture with thick lines | Mild fusion | Is not ideal |
| Comparative example 3 | Without obvious texture | Without obvious texture | Moderate fusion | Is not ideal |
| Comparative example 4 | Sparseness of grain | Dot-like texture | Moderate fusion | Is not ideal |
| Comparative example 5 | Moderate texture | Fine line texture | Great chromatic aberration | Is not ideal |
| Comparative example 6 | Over dense texture | Without obvious texture | Moderate fusion | Is not ideal |
| Comparative example 7 | Moderate texture | Fine line texture | Excessive fusion | Is not ideal |
| Comparative example 8 | Sparse texture | Texture with thick lines | Moderate fusion | Is not ideal |
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: use the technical scheme of this application, the granule injection molding that this application provided, adopt the PMMA master batch, masterbatch A and masterbatch B are the raw materials, through controlling the volume, quantity and the melting temperature of masterbatch A and masterbatch B respectively, at the in-process of the PMMA injection molding that has the texture, masterbatch B does not melt in the PMMA substrate completely, form crack or crack, masterbatch A part melts in the PMMA substrate, produce the flow mark and form the unique aesthetic feeling that the decorative texture demonstrates simulation natural flow and natural texture, enrich the outward appearance image of injection molding. Compared with the traditional printing process, the method has more natural and various forms.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A particle injection molding material is characterized by comprising a PMMA master batch, a master batch particle A and a master batch particle B, wherein the volumes of the master batch particle A and the master batch particle B are respectively and independently 1/4-1/2 of the volume of the PMMA master batch, the mass proportion of the master batch particle A and the master batch particle B in the particle injection molding material is respectively and independently 0-0.5%, and is free of 0, the melting temperature of the master batch particle B is higher than that of the master batch particle A, and the melting temperature of the master batch particle A is higher than that of the PMMA master batch particle.
2. The pellet injection molding compound of claim 1, wherein the PMMA masterbatch has a volume of 15-25 mm 3 The volumes of the color master batch particle A and the color master batch particle B are respectively and independently 3.75-12.5 mm 3 。
3. The pellet injection molding compound of claim 2, wherein the PMMA masterbatch has a volume of 16-24 mm 3 ，
And/or the volume of the color master batch particle A and the volume of the color master batch particle B are respectively and independently 4-12 mm 3 。
4. The pellet injection molding compound of claim 1, wherein the PMMA masterbatch particles are translucent, the color of masterbatch particles a is chromatic, and the color of masterbatch particles B is white or off-white.
5. The pellet injection molding compound of claim 1, wherein the material of the PMMA masterbatch comprises a first PMMA resin;
the color masterbatch particle A comprises a second PMMA resin, a first ABS resin and a first colorant, wherein the mass ratio of the second PMMA resin to the first ABS resin is as follows: 20-80, wherein the mass ratio of the first colorant in the color master batch particle A is 3% -15%;
the material of the color masterbatch particle B comprises a second ABS resin and a second colorant, and the mass percentage of the second colorant in the color masterbatch particle B is 3-15%.
6. The pellet injection molding compound of claim 5, wherein the first colorant is a green color concentrate and the second colorant is a white color concentrate.
7. The pellet injection molding compound of claim 5, wherein the material of the PMMA masterbatch further comprises aluminum powder pigment or pearl powder pigment;
and/or the material of the color master batch particle A also comprises an aluminum powder pigment or a pearl powder pigment;
and/or the material of the color master batch particle B also comprises an aluminum powder pigment or a pearl powder pigment.
8. A textured PMMA injection moulded part, characterized in that the material of the textured PMMA injection moulded part is the particle injection moulding according to any one of claims 1 to 7.
9. Method for producing a textured PMMA injection molded part according to claim 8, characterized in that the method comprises:
step S1, mixing the PMMA master batch, the color master batch particles A and the color master batch particles B to obtain the particle injection molding material;
s2, drying and heating the particle injection molding material of the injection molding piece to melt the PMMA master batch, wherein the color master batch A is partially melted, and the color master batch B is not melted to obtain a molten injection molding material;
and S3, carrying out injection molding on the molten injection molding material to obtain the PMMA injection molding piece with the texture.
10. The method according to claim 9, wherein the drying temperature in step S2 is 80-90 ℃ for 3-4 hours.
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| CN105482351A (en) * | 2015-11-30 | 2016-04-13 | 四川长虹电器股份有限公司 | ABS material with marble imitation decorative effect and preparation method thereof |
| CN113372681A (en) * | 2021-05-25 | 2021-09-10 | 天键电声股份有限公司 | Flow pattern material and application thereof on earphone |
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| CN105482351A (en) * | 2015-11-30 | 2016-04-13 | 四川长虹电器股份有限公司 | ABS material with marble imitation decorative effect and preparation method thereof |
| CN113372681A (en) * | 2021-05-25 | 2021-09-10 | 天键电声股份有限公司 | Flow pattern material and application thereof on earphone |
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