A laser-engravable ABS resin composition, a preparation method and application thereof

Abstract

The application discloses a laser etching ABS resin composition, which comprises the following raw material components in parts by weight: 10-60 parts of ABS resin; 1-20 parts of laser etching auxiliary agent; 1-30 parts of heat-conducting ceramic powder; 1-30 parts of inorganic filler; and 0.1-10 parts of color powder. The heat-conducting ceramic powder and the laser etching auxiliary agent are used in cooperation in the system, the heat dissipation effect of the base resin is greatly improved, and the problems of ablation, foaming, coking and the like in the process of laser etching resin are solved, so that the production efficiency of laser etching is improved and the definition of laser etching text or image on the surface of the material is improved. In addition, the application also provides a preparation process of the laser etching ABS resin composition and application of the laser etching ABS resin composition to laser marking in the fields of cosmetic container packaging, household electronics, office supplies and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high molecular materials, in particular to a laser engraving ABS resin composition, a preparation method and application thereof. BACKGROUND

[0002] Laser marking technology is an industrial marking method that has developed rapidly in recent years. Compared with traditional marking methods (mechanical engraving, chemical corrosion, screen printing, ink printing and other methods), laser marking has obvious advantages. 1. Wide application range: almost all materials can be marked. 2. High marking efficiency: the laser beam under computer control can move at high speed, and the usual marking process can be completed in a few seconds, and online marking can be realized. 3. High marking precision: laser can form an extremely fine beam, and the thinnest line width on the material surface can reach the micron level, and various patterns, trademarks, bar codes and two-dimensional codes can be printed. 4. Low use cost: laser marking is a non-contact marking method, which is not limited by the fatigue service life of the usual mold marking, and the maintenance cost in batch processing is very low. At present, laser marking accounts for more than 90% of the market in the marking and printing industry, and laser marking can be applied to various materials including plastics, rubbers, metals and silicon wafers.

[0003] The basic principle of laser marking is that a high-energy continuous laser beam is generated by a laser generator, and when the laser acts on the printing material, the atom in the ground state jumps to a higher energy state; the atom in the higher energy state is unstable and will soon return to the ground state, and when the atom returns to the ground state, it will release extra energy in the form of photons or quanta, and convert the light energy into heat energy, causing the surface material to melt and even vaporize instantaneously, thereby forming a pattern mark.

[0004] Patent No. 201710488854.2 discloses a laser engraving master batch, which uses polypropylene as the master batch carrier and includes 15-25% of inorganic oxide by weight of the total weight. A laser-markable high-flow high-brightness black polypropylene composition is also disclosed, which includes the following components by weight: laser engraving master batch 1-5 parts, polypropylene resin 71.4-90.4 parts, C5 petroleum resin 2-5 parts, barium sulfate 5-15 parts, nucleating agent 0.1-0.4 parts, antioxidant 0.2-0.6 parts, toner 1-2 parts, and lubricant 0.3-0.6 parts. The laser engraving master batch in the patent uses photosensitizer and inorganic oxide to greatly improve the clarity of laser marking and the whiteness of marked text when the laser engraving master batch is used as an effective component in a laser-markable polypropylene composition. The laser-markable polypropylene composition in the patent has high flowability, high brightness, high laser marking whiteness and high clarity, ensuring that the appearance of the final laser-marked product is not easily damaged. The composition has good application prospects in household appliance shells.

[0005] Patent No. 201410837554.7 discloses a kind of laser engraving master batch for light color identification and its preparation method and application.The master batch includes the following weight fraction components: carrier resin 95-66 parts;Light absorbing toner 0.01-0.5 parts;Light reflecting powder 0.01-0.5 parts;Foaming agent 0.7-6 parts;Carbon black 0.05-1.5 parts;Whitening filler 5-20 parts;Processing modified oil 0.01-4 parts.The laser engraving master batch in the patent can be selected according to the application of the base resin, which has good compatibility and uniform dispersion in the base resin, and can have both engraving and foaming effects under the action of laser with a small amount of addition, can be applied in different base resins, and the marking effect is uniform, clear, and has high contrast with the resin, and the mechanical properties of the original resin material are not affected, which can be applied in the field of laser marking modified plastics, and is widely used in various general plastics and engineering plastics.

[0006] However, the laser engraving master batch prepared by the above-mentioned patent cannot effectively remove the heat in the base resin during laser marking process, and cannot effectively solve the problems of ablation, foaming and coking during laser etching resin process. SUMMARY

[0007] In order to solve the problems in the prior art, the present application provides a laser engraving ABS resin composition, which uses heat-conducting ceramic powder and laser engraving aids in the system to greatly improve the heat dissipation effect of the base resin, solves the problems of ablation, foaming and coking during laser etching resin process, and improves the production efficiency of laser engraving and the clarity of laser engraved text or image on the surface of the material.In addition, the present application also provides a preparation process of the above-mentioned laser engraving ABS resin composition and its application in the field of laser marking such as cosmetic container packaging, household electronics and office supplies.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0009] In the first aspect of the present application, a laser engraving ABS resin composition is provided, which includes the following weight fractions of raw material components:

[0010] ABS resin 10-60 parts;

[0011] Laser engraving aid 1-20 parts;

[0012] Thermal conductive ceramic powder 1-30 parts;

[0013] Inorganic filler 1-30 parts;

[0014] Toner 0.1-10 parts.

[0015] Preferably, the following weight fractions of raw material components are included:

[0016] ABS resin 15-40 parts;

[0017] Engraving aid 5-15 parts;

[0018] Thermal conductive ceramic powder 5-30 parts;

[0019] Inorganic filler 5-25 parts;

[0020] Color powder 0.5-5 parts.

[0021] Further, the thermal conductive ceramic powder is a mixture of one or more of aluminum nitride, boron nitride, and silicon nitride.

[0022] When the thermal conductive ceramic powder is a single component, experimental results show that the use effect of the product system is best when aluminum nitride is selected, and the average particle size of the aluminum nitride is preferably ≤50 μm.

[0023] Preferably, the thermal conductive ceramic powder is a mixture of aluminum nitride, boron nitride, and / or silicon nitride.

[0024] Experimental results show that the use effect of the product system is better when multiple ceramic powder components are used in combination than when a single component of the thermal conductive ceramic powder is used. Specifically, the thermal conductive ceramic powder can be a mixture of aluminum nitride and boron nitride, or a mixture of aluminum nitride and silicon nitride.

[0025] Further, the engraving aid is titanium dioxide.

[0026] Further, 0-10 parts of an elastomer, 0-1 part of an antioxidant, and 0-1 part of a coupling agent are further included.

[0027] Preferably, 0.5-5 parts of the elastomer, 0.1-1 part of the antioxidant, and 0.1-1 part of the coupling agent are added to the system.

[0028] Specifically, the inorganic filler can be calcium carbonate, talc powder, mica powder, quartz powder, etc. The color powder can be carbon black, iron oxide series pigments, cobalt blue, bismuth yellow, etc. The elastomer can be a styrene-based elastomer TPS, an olefin-based elastomer TPO, a polyurethane-based elastomer TPU, a polyester-based elastomer TPEE, etc. The antioxidant can be antioxidant 1010 and / or antioxidant 168. The coupling agent can be a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, a borate coupling agent, etc.

[0029] In a second aspect of the present application, a preparation method of the above-mentioned engraving ABS resin composition is provided, comprising the following steps:

[0030] S1, sequentially adding each raw material component into a high-speed mixer to mix uniformly to obtain a mixture;

[0031] S2, the mixture is added to a twin-screw extruder, melt blended, extruded and granulated to obtain a master batch of the laser-engravable ABS resin composition;

[0032] In step S2, the melting temperature is 180-260 DEG C, and the screw rotation speed is 200-600 rpm.

[0033] Further, in step S2, the melting temperature is 200-240 DEG C, and the screw rotation speed is 300-500 rpm.

[0034] In a third aspect, the application provides a use of the laser-engravable ABS resin composition as described above, which is added to a base resin and used in the field of laser-marked cosmetic container packaging, household electronics or office supplies.

[0035] Compared with the prior art, the application has the following advantages:

[0036] In the application, the heat-conducting ceramic powder and the laser-engravable additive are used in combination in the product system, which greatly improves the heat dissipation effect of the base resin, solves the problems of ablation, foaming and carbonization during the laser etching process, and improves the production efficiency of laser engraving and the clarity of the laser-engraved text or image on the material surface. DETAILED DESCRIPTION

[0037] The technical solutions in the application will be described below in connection with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the application.

[0038] Embodiment 1

[0039] The laser-engravable ABS resin composition in this embodiment comprises the following raw material components by weight:

[0040] ABS resin 35 parts;

[0041] Laser-engravable additive 5 parts;

[0042] Heat-conducting ceramic powder 10 parts;

[0043] Inorganic filler 10 parts;

[0044] Color powder 1 part;

[0045] Elastomer 1 part;

[0046] Antioxidant 1 part;

[0047] Coupling agent 1 part.

[0048] The laser-engaving aid is titanium dioxide; the heat-conducting ceramic powder is aluminum nitride, which has a thermal conductivity of 200 W / (m·K) and an average particle size of 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0049] The laser-engaving ABS resin composition in this example was prepared by the following method:

[0050] S1, the raw material components were added to a high-speed mixer in turn, mixed at a low speed of 50 rpm for 2 minutes, and mixed at a high speed of 300 rpm for 5 minutes to obtain a mixture;

[0051] S2, the mixture was added to a twin-screw extruder, and was subjected to melt blending and extrusion granulation to obtain a laser-engaving ABS resin composition master batch;

[0052] In step S2, the melting temperature was 220°C, and the screw rotation speed was 400 rpm.

[0053] Example 2

[0054] The laser-engaving ABS resin composition in this example included the following raw material components by weight:

[0055] ABS resin 35 parts;

[0056] Laser-engaving aid 5 parts;

[0057] Heat-conducting ceramic powder 10 parts;

[0058] Inorganic filler 10 parts;

[0059] Color powder 1 part;

[0060] Elastomer 1 part;

[0061] Antioxidant 1 part;

[0062] Coupling agent 1 part.

[0063] The laser-engaving aid is titanium dioxide; the heat-conducting ceramic powder is aluminum nitride, which has a thermal conductivity of 200 W / (m·K) and an average particle size of 100 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0064] The laser-engaving ABS resin composition in this example was prepared by the same method as in Example 1.

[0065] Example 3

[0066] The laser-engravable ABS resin composition in this example includes the following raw material components by weight parts:

[0067] ABS resin 35 parts;

[0068] Laser-engravable aid 5 parts;

[0069] Thermal conductive ceramic powder 10 parts;

[0070] Inorganic filler 10 parts;

[0071] Color powder 1 part;

[0072] Elastomer 1 part;

[0073] Antioxidant 1 part;

[0074] Coupling agent 1 part.

[0075] The laser-engravable aid is titanium dioxide; the thermal conductive ceramic powder is boron nitride with a thermal conductivity of 57 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0076] The preparation method of the laser-engravable ABS resin composition in this example is the same as that in Example 1.

[0077] Example 4

[0078] The laser-engravable ABS resin composition in this example includes the following raw material components by weight parts:

[0079] ABS resin 35 parts;

[0080] Laser-engravable aid 5 parts;

[0081] Thermal conductive ceramic powder 10 parts;

[0082] Inorganic filler 10 parts;

[0083] Color powder 1 part;

[0084] Elastomer 1 part;

[0085] Antioxidant 1 part;

[0086] Coupling agent 1 part.

[0087] The laser-engravable aid is titanium dioxide; the thermal conductive ceramic powder is boron nitride with a thermal conductivity of 57 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0088] The preparation method of the engraving ABS resin composition in this embodiment is the same as that in Embodiment 1.

[0089] Embodiment 5

[0090] The engraving ABS resin composition in this embodiment includes the following raw material components in parts by weight:

[0091] ABS resin 35 parts;

[0092] Engraving aid 5 parts;

[0093] Thermal conductive ceramic powder 20 parts;

[0094] Inorganic filler 10 parts;

[0095] Color powder 1 part;

[0096] Elastomer 1 part;

[0097] Antioxidant 1 part;

[0098] Coupling agent 1 part.

[0099] The engraving aid is titanium dioxide; the thermal conductive ceramic powder is 10 parts of aluminum nitride and 10 parts of silicon nitride, the thermal conductivity of the aluminum nitride is 200 W / (m·K), and the average particle size is 30 μm, the thermal conductivity of the silicon nitride is 21 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidants 1010 and 168 in a weight ratio of 1:1; and the coupling agent is KH560.

[0100] The preparation method of the engraving ABS resin composition in this embodiment is the same as that in Embodiment 1.

[0101] Embodiment 6

[0102] The engraving ABS resin composition in this embodiment includes the following raw material components in parts by weight:

[0103] ABS resin 35 parts;

[0104] Engraving aid 5 parts;

[0105] Thermal conductive ceramic powder 20 parts;

[0106] Inorganic filler 10 parts;

[0107] Color powder 1 part;

[0108] Elastomer 1 part;

[0109] Antioxidant 1 part;

[0110] Coupling agent 1 part.

[0111] The engraving aid is titanium dioxide; the heat-conducting ceramic powder is 10 parts of aluminum nitride and 10 parts of boron nitride, the heat-conductivity coefficient of the aluminum nitride is 200 W / (m·K), and the average particle size is 30 μm, the heat-conductivity coefficient of the boron nitride is 57 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0112] The preparation method of the engraving ABS resin composition in this example is the same as that in Example 1.

[0113] Example 7

[0114] The engraving ABS resin composition in this example includes the following raw material components by weight:

[0115] ABS resin 35 parts;

[0116] engraving aid 5 parts;

[0117] heat-conducting ceramic powder 25 parts;

[0118] inorganic filler 10 parts;

[0119] color powder 1 part;

[0120] elastomer 1 part;

[0121] antioxidant 1 part;

[0122] coupling agent 1 part.

[0123] The engraving aid is titanium dioxide; the heat-conducting ceramic powder is 10 parts of aluminum nitride and 10 parts of boron nitride, the heat-conductivity coefficient of the aluminum nitride is 200 W / (m·K), and the average particle size is 30 μm, the heat-conductivity coefficient of the boron nitride is 57 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0124] The preparation method of the engraving ABS resin composition in this example is the same as that in Example 1.

[0125] Comparative Example 1

[0126] The engraving ABS resin composition in this example includes the following raw material components by weight:

[0127] ABS resin 35 parts;

[0128] engraving aid 5 parts;

[0129] heat-conducting ceramic powder 35 parts;

[0130] Inorganic filler 10 parts;

[0131] Color powder 1 part;

[0132] Elastomer 1 part;

[0133] Antioxidant 1 part;

[0134] Coupling agent 1 part.

[0135] The engraving aid is titanium dioxide; the heat-conducting ceramic powder is 25 parts of aluminum nitride and 10 parts of silicon nitride, the heat-conducting coefficient of the aluminum nitride is 200 W / (m·K), and the average particle size is 30 μm, the heat-conducting coefficient of the silicon nitride is 21 W / (m·K); the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1; and the coupling agent is KH560.

[0136] The preparation method of the engraving ABS resin composition in the comparative example is the same as that in example 1.

[0137] Comparative example 2

[0138] Comparative example 2 is a comparative experimental example of example 1, and the difference between them is that the heat-conducting ceramic powder is not added in the product system of comparative example 2.

[0139] The engraving ABS resin composition in the comparative example comprises the following raw material components in parts by weight:

[0140] ABS resin 35 parts;

[0141] Engraving aid 5 parts;

[0142] Inorganic filler 10 parts;

[0143] Color powder 1 part;

[0144] Elastomer 1 part;

[0145] Antioxidant 1 part;

[0146] Coupling agent 1 part.

[0147] The engraving aid is titanium dioxide; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1; and the coupling agent is KH560.

[0148] The preparation method of the engraving ABS resin composition in the comparative example is the same as that in example 1.

[0149] Comparative example 3

[0150] Comparative Example 3 is a comparative example of Example 1, which is different from Example 1 in that no engraving aid is added in the product system.

[0151] The engraving ABS resin composition in the comparative example comprises the following raw material components by weight parts:

[0152] ABS resin 35 parts;

[0153] Thermal conductive ceramic powder 10 parts;

[0154] Inorganic filler 10 parts;

[0155] Color powder 1 part;

[0156] Elastomer 1 part;

[0157] Antioxidant 1 part;

[0158] Coupling agent 1 part.

[0159] Among them, the thermal conductive ceramic powder is aluminum nitride, the thermal conductivity of aluminum nitride is 200 W / (m·K), and the average particle size is 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidants 1010 and antioxidant 168 in a ratio of 1:1; and the coupling agent is KH560.

[0160] The preparation method of the engraving ABS resin composition in the comparative example is the same as that of Example 1.

[0161] Example 8

[0162] The engraving ABS resin composition in the example comprises the following raw material components by weight parts:

[0163] ABS resin 10 parts;

[0164] Engraving aid 1 part;

[0165] Thermal conductive ceramic powder 1 part;

[0166] Inorganic filler 1 part;

[0167] Color powder 0.1 part;

[0168] Elastomer 0.5 part;

[0169] Antioxidant 0.1 part;

[0170] Coupling agent 0.1 part.

[0171] The laser-engaving auxiliary agent is titanium dioxide; the heat-conducting ceramic powder is aluminum nitride, the heat conductivity coefficient of which is 200 W / (m·K), and the average particle size is 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1; and the coupling agent is KH560.

[0172] The preparation method of the laser-engaving ABS resin composition in this example is as follows:

[0173] S1, sequentially add each raw material component into a high-speed mixer, mix at a low speed of 50 rpm for 1 minute, and mix at a high speed of 300 rpm for 2 minutes to obtain a mixture;

[0174] S2, add the mixture into a twin-screw extruder, melt blend, and extrude and granulate to obtain a laser-engaving ABS resin composition master batch;

[0175] In step S2, the melting temperature is 180℃, and the screw rotation speed is 200 rpm.

[0176] Example 9

[0177] The laser-engaving ABS resin composition in this example comprises the following raw material components by weight:

[0178] ABS resin 15 parts;

[0179] Laser-engaving auxiliary agent 2 parts;

[0180] Heat-conducting ceramic powder 5 parts;

[0181] Inorganic filler 5 parts;

[0182] Color powder 0.5 part;

[0183] Elastomer 5 parts;

[0184] Antioxidant 0.5 part;

[0185] Coupling agent 0.5 part.

[0186] The laser-engaving auxiliary agent is titanium dioxide; the heat-conducting ceramic powder is aluminum nitride, the heat conductivity coefficient of which is 200 W / (m·K), and the average particle size is 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1; and the coupling agent is KH560.

[0187] The preparation method of the laser-engaving ABS resin composition in this example is as follows:

[0188] S1, each raw material component is added to a high-speed mixer in turn, mixed at a low speed of 50 rpm for 2 minutes, and mixed at a high speed of 300 rpm for 4 minutes to obtain a mixture;

[0189] S2, the mixture is added to a twin-screw extruder for melt blending and extrusion granulation to obtain a laser-engravable ABS resin composition master batch;

[0190] In step S2, the melting temperature is 200°C, and the screw speed is 300 rpm.

[0191] Example 10

[0192] The laser-engravable ABS resin composition in this example includes the following raw material components by weight:

[0193] ABS resin 40 parts;

[0194] Laser-engravable aid 15 parts;

[0195] Thermal conductive ceramic powder 10 parts;

[0196] Inorganic filler 25 parts;

[0197] Color powder 5 parts;

[0198] Elastomer 5 parts;

[0199] Antioxidant 1 part;

[0200] Coupling agent 1 part.

[0201] The laser-engravable aid is titanium dioxide; the thermal conductive ceramic powder is aluminum nitride with a thermal conductivity of 200 W / (m·K) and an average particle size of 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidants 1010 and 168 in a ratio of 1:1; and the coupling agent is KH560.

[0202] The preparation method of the laser-engravable ABS resin composition in this example is as follows:

[0203] S1, each raw material component is added to a high-speed mixer in turn, mixed at a low speed of 50 rpm for 2 minutes, and mixed at a high speed of 300 rpm for 5 minutes to obtain a mixture;

[0204] S2, the mixture is added to a twin-screw extruder for melt blending and extrusion granulation to obtain a laser-engravable ABS resin composition master batch;

[0205] In step S2, the melting temperature is 240°C, and the screw speed is 400 rpm.

[0206] Example 11

[0207] The laser-engravable ABS resin composition in the embodiment includes the following raw material components in parts by weight:

[0208] ABS resin 60 parts;

[0209] Laser-engravable auxiliary agent 20 parts;

[0210] Thermally conductive ceramic powder 30 parts;

[0211] Inorganic filler 30 parts;

[0212] Color powder 10 parts;

[0213] Elastomer 10 parts;

[0214] Antioxidant 1 part;

[0215] Coupling agent 1 part.

[0216] The laser-engravable auxiliary agent is titanium dioxide; the thermally conductive ceramic powder is aluminum nitride with a thermal conductivity of 200 W / (m·K) and an average particle size of 30 μm; the inorganic filler is mica; the color powder is carbon black; the elastomer is an olefin-based elastomer TPO; the antioxidant is a mixture of antioxidants 1010 and 168 in a weight ratio of 1:1; and the coupling agent is KH560.

[0217] The preparation method of the laser-engravable ABS resin composition in the embodiment is as follows:

[0218] S1, each raw material component is sequentially added to a high-speed mixer, mixed at a low speed of 50 rpm for 2 minutes, and mixed at a high speed of 300 rpm for 5 minutes to obtain a mixture;

[0219] S2, the mixture is added to a twin-screw extruder, and melt-blended, extruded and granulated to obtain a laser-engravable ABS resin composition master batch;

[0220] In step S2, the melting temperature is 260°C, and the screw rotation speed is 600 rpm.

[0221] The laser-engravable ABS resin composition master batches prepared in Examples 1-11 and Comparative Examples 1-3 are respectively applied to an ABS resin matrix, and the specific product formula is as follows: laser-engravable ABS resin composition master batch 3 parts, ABS resin 100 parts.

[0222] The preparation process is as follows:

[0223] (1) The ABS resin and the laser-engravable ABS resin composition master batch are added to a high-speed mixer and mixed uniformly to obtain a mixture;

[0224] (2) The above mixture is added to a twin-screw extruder, the screw rotation speed is 400 rpm, the temperature of the twin-screw extruder is 250°C, under the conveying and shearing action of the twin-screw extruder, the material is fully melted, plasticized, kneaded, mixed, extruded through the head, drawn, cooled, cut, dried, and finally packaged, to obtain the laser-engravable ABS resin material.

[0225] The laser-engravable ABS resin material prepared above is subjected to performance testing, and the test results are shown in Table 1, and the test standards are as follows:

[0226] The bending strength is tested according to the ISO 527 standard, the bending modulus is tested according to the ISO 178 standard, the tensile strength is tested according to the ISO 178 standard, and the impact strength (without notch) is tested according to the ISO 180 standard.

[0227] The laser marking equipment is ZX-20F (Shanghai Zhengxun Laser Equipment Co., Ltd.), the laser wavelength is 1064nm, and the laser power is 700w.

[0228] The clarity of laser printing marking is evaluated by visual observation, and the clarity is marked as 1, 2, 3, 4, 5, and 6 from low to high, the blackness value of the laser marking area is tested by using a color difference meter, and the glossiness of the product is tested by using a glossiness tester ASTM G272-19.

[0229] Table 1

[0230]

[0231]

[0232] From the test results in Table 1, it can be seen that Examples 1-4 are compared, different types of heat-conducting ceramic powders are used in the product system, due to the difference in thermal conductivity, the overall performance of the product prepared by using aluminum nitride as the heat-conducting ceramic powder is the best, and the average particle size of the preferred aluminum nitride is ≤50μm.

[0233] Examples 1, 5 and 6 are compared, the difference between the three is that aluminum nitride is used as the heat-conducting ceramic powder in Example 1, two kinds of heat-conducting ceramic powders are mixed in Examples 5 and 6, among which aluminum nitride and silicon nitride are compounded as the heat-conducting ceramic powder in Example 5, and aluminum nitride and boron nitride are compounded as the heat-conducting ceramic powder in Example 6, through testing, the overall performance of the products prepared in Examples 5 and 6 is better than that in Example 1, which shows that the mixed effect of multiple heat-conducting ceramic powders is better.

[0234] Comparing example 5, 7 and comparative example 1, the difference among them is that the amount of the heat-conducting ceramic powder in the system is different, the amount of the heat-conducting ceramic powder in example 5 is 20 parts by weight, the amount of the heat-conducting ceramic powder in example 7 is 25 parts by weight, the amount of the heat-conducting ceramic powder in comparative example 1 is 35 parts by weight, the product prepared in example 7 has the best overall performance, the product prepared in comparative example 1 has the worst overall performance, which shows that the amount of the heat-conducting ceramic powder in the product system of the application is preferably 5-30 parts by weight, and more preferably 25 parts by weight.

[0235] Comparing example 1 with comparative examples 2 and 3, the difference among them is that in example 1, the titanium dioxide as a laser engraving aid is compounded with aluminum nitride as the heat-conducting ceramic powder, in comparative example 2, only the titanium dioxide as the laser engraving aid is added, and no heat-conducting ceramic powder is added, in comparative example 3, only the heat-conducting ceramic powder is added, and no titanium dioxide as the laser engraving aid is added, it is tested that the performance of the products prepared in comparative examples 2 and 3 is obviously poorer, which shows that the heat-conducting ceramic powder and the laser engraving aid are compounded and used in the product system to have a synergistic effect.

[0236] Although the embodiments of the application have been shown and described, it is to be understood that for the purpose of the present application, the changes in the embodiments, the modifications, the replacements and the variations can be made by those skilled in the art without departing from the principles and the spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A laser engraving ABS resin composition, characterized by, The raw material components include the following weight parts: ABS resin 15-40 parts; Laser engraving aid 5-15 parts; Thermal conductive ceramic powder 5-30 parts; Inorganic filler 5-25 parts; Color powder 0.5-5 parts; The thermal conductive ceramic powder is a mixture of one or more of aluminum nitride, boron nitride, and silicon nitride, and the average particle size of the aluminum nitride is ≤50 μm; The laser engraving aid is titanium dioxide.

2. The laser engraving ABS resin composition according to claim 1, characterized by, The thermal conductive ceramic powder is a mixture of aluminum nitride, boron nitride, and / or silicon nitride.

3. The laser engraving ABS resin composition according to claim 1, characterized by, It also includes 0-10 parts of elastomer, 0-1 parts of antioxidant, and 0-1 parts of coupling agent.

4. A method for preparing the laser engraving ABS resin composition according to any one of claims 1 to 3, characterized by, The method includes the following steps: S1. sequentially adding each raw material component into a high-speed mixer to mix uniformly, to obtain a mixture; S2. adding the mixture into a twin-screw extruder to melt blend, extrude and granulate, to obtain a laser engraving ABS resin composition master batch; In step S2, the melting temperature is 180-260°C, and the screw rotation speed is 200-600 rpm.

5. The method of claim 4, wherein the method is characterized by, In step S2, the melting temperature is 200-240°C, and the screw rotation speed is 300-500 rpm.

6. Use of the laser engraving ABS resin composition according to any one of claims 1 to 3, characterized in that, The laser engraving ABS resin composition is added to a base resin and applied in the field of laser marking cosmetic container packaging, household electronics, or office supplies.

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