Modified polypropylene material and preparation method thereof

Abstract

The invention discloses a modified polypropylene material and a preparation method thereof. The modified polypropylene material is prepared from the following components in percentage by weight: 20 to 90 percent of polypropylene resin, 5 to 40 percent of talcum powder, 0.5 to 4 percent of laser carving master batch, 1 to 10 percent of anti-pulverization master batch, 0.1 to 1 percent of deodorant, 0.2 to 2 percent of lubricant, 0.2 to 2 percent of antioxidant and 0.2 to 5 percent of toner. By adding the self-made anti-pulverization master batch, the deodorant and the laser carving master batch, the modified polypropylene material which is good in steam resistance, resistant to pulverization, low in odor and remarkable in marking effect is prepared. The preparation method is simple in process, convenient to operate and low in cost, and has a wide application prospect in the field of household appliances.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer material modification, and in particular relates to a modified polypropylene material and a preparation method thereof. Background Art

[0002] Polypropylene has good mechanical properties, anti-bending fatigue performance, environmental protection and non-toxicity, as well as excellent solvent resistance, and is widely used in the field of home appliances. However, in actual production, screen printing and inkjet coding are often used to mark its products. These marking methods not only have the problem of environmental pollution, but also the products are prone to wear and fading after long-term use. Laser marking is an environmentally friendly and fine marking method. It uses a high-energy laser beam to act on the surface of the product, converting light energy into heat energy, causing physical and chemical changes on the surface of the material, thereby leaving a permanent mark. Therefore, the use of laser marking technology to mark polypropylene products has broad application prospects.

[0003] In the field of household appliances, especially small household appliances such as kettles and rice cookers, their steam valves, water outlets and other components are exposed to high-temperature steam for a long time, which causes product powdering and brittleness problems. This not only affects the service life of the product, but also brings safety hazards. Therefore, improving the anti-powdering performance of polypropylene materials has become a major problem in the industry.

[0004] In addition, small household appliances are distributed in almost every household around the world. As products that people come into contact with for a long time, they are not only required to be beautiful and practical, but more importantly, they must have a good smell. However, polypropylene materials will release irritating gases to varying degrees after modification. As products that come into contact with consumers for a long time, they are increasingly questioned. How to improve the smell of products and meet the needs of consumers is a topic that needs to be solved urgently. Summary of the invention

[0005] In order to overcome the above technical problems in the field of home appliances, the primary purpose of the present invention is to provide a modified polypropylene material. The polypropylene material has the properties of anti-powdering, low odor and easy marking.

[0006] The second object of the present invention is to provide a method for preparing a modified polypropylene material.

[0007] The primary purpose of the present invention can be achieved through the following technical solutions:

[0008] A modified polypropylene material is composed of the following components in weight percentage: 20-90% polypropylene resin, 5-40% talcum powder, 0.5-4% laser engraving masterbatch, 1-10% anti-powdering masterbatch, 0.1-1% deodorant, 0.2-2% lubricant, 0.2-2% antioxidant and 0.2-5% color powder.

[0009] Preferably, the modified polypropylene material is composed of the following components in weight percentage: 70.3% polypropylene resin, 20% talcum powder, 2% laser engraving masterbatch, 5% anti-powdering masterbatch, 0.5% deodorant, 0.3% lubricant, 0.6% antioxidant, and 1.3% toner.

[0010] Preferably, the anti-powdering masterbatch is one of anti-powdering masterbatch-1 or anti-powdering masterbatch-2.

[0011] Preferably, when the anti-powdering masterbatch is anti-powdering masterbatch-1, the preparation method of the anti-powdering masterbatch-1 comprises the following steps:

[0012] Add 50-99.2% of polypropylene resin, 0.2-2% of antioxidant, 0.2-2% of ultraviolet absorber, 0.2-2% of light stabilizer and 0.2-2% of lubricant into a high-speed mixer according to mass percentage;

[0013] The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min;

[0014] Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-1.

[0015] Preferably, when the anti-powdering masterbatch is the anti-powdering masterbatch-2, the preparation method of the anti-powdering masterbatch-2 comprises the following steps:

[0016] Add 50-97.5% of polypropylene resin, 0.5-5% of antioxidant, 0.5-5% of ultraviolet absorber, 0.5-5% of light stabilizer, 0.5-5% of lubricant and 0.5-5% of nucleating agent into a high-speed mixer according to mass percentage;

[0017] The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min;

[0018] Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-2.

[0019] Preferably, the melt index of the polypropylene resin is 3-100 g / 10 min, and the polypropylene resin is a homopolymer polypropylene resin or a copolymer polypropylene resin.

[0020] Preferably, the talc powder has a particle size of 200 to 3000 meshes.

[0021] Preferably, the laser engraving masterbatch is LaserAT-8632, with a density of 1.55±0.2g / cm 3 , suitable for laser marking systems with laser wavelengths between 355-1064nm.

[0022] Preferably, the deodorant is JH-200A.

[0023] Preferably, the lubricant is at least one of zinc stearate, calcium stearate, magnesium stearate, and vinyl bisstearamide.

[0024] Preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1098, DSTDP, and antioxidant P-EPQ.

[0025] Preferably, the color powder is at least one of titanium dioxide, antimony dioxide, phthalocyanine blue, phthalocyanine green, titanium yellow and iron red.

[0026] Preferably, the ultraviolet absorber is at least one of UV 234 and UV531.

[0027] Preferably, the light stabilizer is TINUVIN 770.

[0028] Preferably, the nucleating agent is at least one of NA-40 and NA-21.

[0029] The second object of the present invention can be achieved by the following technical solutions:

[0030] A method for preparing a modified polypropylene material comprises the following steps:

[0031] (1) preparing raw materials according to requirements, firstly putting polypropylene resin, talcum powder, laser engraving masterbatch, and anti-powdering masterbatch into a high-speed mixer and stirring for 3 to 15 minutes for the first time, and then pouring in a deodorant, an antioxidant, a lubricant, and a toner and stirring for a second time for 2 to 5 minutes to prepare a mixture;

[0032] (2) Pour the mixture in step (1) into a twin-screw extruder for mixing at a speed of 300 to 600 r.min. -1The aspect ratio of the screw is 40:1, the temperature of each zone and the head temperature ranges from 190 to 230°C, the residence time of the mixture in the screw is 2 to 10 minutes, and finally, the extruded strips are water-cooled and granulated to obtain the required modified polypropylene material.

[0033] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0034] The modified polypropylene material of the present invention can effectively improve the marking effect of home appliance parts by adding laser engraving masterbatch, anti-powdering masterbatch and deodorant. Compared with the traditional inkjet marking method, it is environmentally friendly and durable. It also solves the problem that home appliance parts are not resistant to heat steam and are prone to product powdering and falling off, prolongs the service life of the product, and ensures the safety of consumers. At the same time, the injection molded product has a low odor and will not pollute the surrounding environment, bringing a better user experience. Therefore, the modified polypropylene material has a wide range of application prospects in the field of home appliances. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.

[0036] The anti-powdering masterbatch in the present embodiment and the comparative example is a self-made masterbatch, which are anti-powdering masterbatch-1 and anti-powdering masterbatch-2 respectively; the polypropylene resin is a homopolymer polypropylene and a copolymer polypropylene resin, with a melt index of 3-100g / 10min, and the melt index selected in the present embodiment and the comparative example is 25g / 10min; the antioxidant is at least one of antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1098, DSTDP, and antioxidant P-EPQ. The modified polypropylene material in the present embodiment and the comparative example is a mixture of antioxidant 1010, antioxidant 168 and DSTDP. The antioxidants in the anti-powdering masterbatch-1 and the anti-powdering masterbatch-2 in the present embodiment and the comparative example are antioxidant 1010, antioxidant P-EPQ and DSTDP mixed in a mass ratio of 1:1:1; the ultraviolet absorber is UV 234 and UV531, and UV234 is selected in this embodiment and comparative example; the light stabilizer is TINUVIN 770; the lubricant is at least one of zinc stearate, calcium stearate, magnesium stearate, and vinyl bisstearamide, and vinyl bisstearamide is selected in this embodiment and comparative example; the nucleating agent is NA-40 and NA-21, and NA-40 is selected in this embodiment and comparative example; the talc particle size is 200-3000 mesh, the laser carving masterbatch is LaserAT-8632, the deodorant is JH-200A, and the color powder is at least one of titanium dioxide, antimony white powder, phthalocyanine blue, phthalocyanine green, titanium yellow, and iron red, and titanium dioxide is selected in this embodiment and comparative example;

[0037] Other materials used in the examples and comparative examples of the present invention can be purchased from the market.

[0038] The preparation method of the anti-powdering masterbatch-1 described in this embodiment and the comparative example comprises the following steps:

[0039] Add 98.2% of polypropylene resin, 0.8% of antioxidant, 0.2% of ultraviolet absorber, 0.2% of light stabilizer and 0.6% of lubricant into a high-speed mixer according to mass percentage;

[0040] The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min;

[0041] Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-1.

[0042] The preparation method of the anti-powdering masterbatch-2 described in this embodiment and the comparative example comprises the following steps:

[0043] Add 96.7% of polypropylene resin, 1.2% of antioxidant, 0.5% of ultraviolet absorber, 0.5% of light stabilizer, 0.6% of lubricant and 0.5% of nucleating agent into a high-speed mixer according to mass percentage;

[0044] The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min;

[0045] Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-2.

[0046] Example 1

[0047] A modified polypropylene material is composed of the following components in percentage by weight: 80.3% polypropylene resin, 10% talcum powder, 2% laser engraving masterbatch, 5% anti-powdering masterbatch-1, 0.5% deodorant, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0048] The method for preparing the modified polypropylene material described in this embodiment comprises the following steps:

[0049] According to the mass percentage, first put the polypropylene resin, talcum powder, laser engraving masterbatch, and anti-powdering masterbatch into a high-speed mixer and stir for 5 minutes, then pour in the deodorant, antioxidant, lubricant and color powder and stir for 3 minutes, and finally collect and pack the above mixed mixture.

[0050] The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, and the temperature of die head is 210℃. The mixture stays in the screw for 2 to 10 minutes. Finally, the extruded strips are water-cooled and granulated to obtain the required modified polypropylene material.

[0051] Example 2

[0052] A modified polypropylene material is composed of the following components in percentage by weight: 80.3% polypropylene resin, 10% talcum powder, 2% laser engraving masterbatch, 5% anti-powdering masterbatch-2, 0.5% deodorant, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0053] The preparation method of the modified polypropylene material described in this embodiment is the same as that in Example 1.

[0054] Example 3

[0055] A modified polypropylene material is composed of the following components in percentage by weight: 70.3% polypropylene resin, 20% talcum powder, 2% laser engraving masterbatch, 5% anti-powdering masterbatch-2, 0.5% deodorant, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0056] The preparation method of the modified polypropylene material described in this embodiment is the same as that in Example 1.

[0057] Example 4

[0058] A modified polypropylene material is composed of the following components in percentage by weight: 55.3% polypropylene resin, 35% talcum powder, 2% laser engraving masterbatch, 5% anti-powdering masterbatch-2, 0.5% deodorant, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0059] The preparation method of the modified polypropylene material described in this embodiment is the same as that in Example 1.

[0060] Comparative Example 1

[0061] A modified polypropylene material is composed of the following components in percentage by weight: 77.9% polypropylene resin, 20% talcum powder, 0.2% deodorant, 0.3% lubricant, 0.6% antioxidant and 1% color powder.

[0062] The preparation method of the modified polypropylene material in this comparative example is the same as that in Example 1.

[0063] Comparative Example 2

[0064] A modified polypropylene material is composed of the following components in percentage by weight: 76.1% polypropylene resin, 20% talcum powder, 2% anti-powdering masterbatch-2, 0.3% lubricant, 0.6% antioxidant and 1% color powder.

[0065] The preparation method of the modified polypropylene material in this comparative example is the same as that in Example 1.

[0066] Comparative Example 3

[0067] A modified polypropylene material is composed of the following components in percentage by weight: 77% polypropylene resin, 20% talcum powder, 0.8% laser engraving masterbatch, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0068] The preparation method of the modified polypropylene material in this comparative example is the same as that in Example 1.

[0069] Comparative Example 4

[0070] A modified polypropylene material is composed of the following components in percentage by weight: 77.8% polypropylene resin, 20% talcum powder, 0.3% lubricant, 0.6% antioxidant and 1.3% color powder.

[0071] The preparation method of the modified polypropylene material in this comparative example is the same as that in Example 1.

[0072] Performance test experiment

[0073] The ingredients and performance test results of the modified polypropylene materials of Examples 1 to 4 and Comparative Examples 1 to 4 are shown in Tables 1 and 2.

[0074] Table 1 shows the ingredients of modified polypropylene materials of Examples 1 to 4 and Comparative Examples 1 to 4.

[0075]

[0076]

[0077] Table 2 is the test results of modified polypropylene materials performance of Examples 1 to 4 and Comparative Examples 1 to 4

[0078]

[0079]

[0080] Through the above test experiments, it can be seen that the mechanical properties of Examples 1 to 4 of the present invention are basically the same as those of the comparative example, but the prepared modified polypropylene material has excellent anti-powdering effect, and the product has low odor and clear laser engraving effect, so it has broad application prospects.

[0081] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A modified polypropylene material, characterized in that: The invention is composed of the following components in percentage by weight: 20-90% polypropylene resin, 5-40% talcum powder, 0.5-4% laser engraving masterbatch, 1-10% anti-powdering masterbatch, 0.1-1% deodorant, 0.2-2% lubricant, 0.2-2% antioxidant and 0.2-5% toner.

2. The modified polypropylene material according to claim 1, characterized in that: The anti-powdering masterbatch is one of anti-powdering masterbatch-1 and anti-powdering masterbatch-2.

3. The modified polypropylene material according to claim 2, characterized in that: When the anti-powdering masterbatch is anti-powdering masterbatch-1, the preparation method of the anti-powdering masterbatch-1 comprises the following steps: Add 50-99.2% of polypropylene resin, 0.2-2% of antioxidant, 0.2-2% of ultraviolet absorber, 0.2-2% of light stabilizer and 0.2-2% of lubricant into a high-speed mixer according to mass percentage; The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min; Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-1.

4. The modified polypropylene material according to claim 2, characterized in that: When the anti-powdering masterbatch is the anti-powdering masterbatch-2, the preparation method of the anti-powdering masterbatch-2 comprises the following steps: Add 50-97.5% of polypropylene resin, 0.5-5% of antioxidant, 0.5-5% of ultraviolet absorber, 0.5-5% of light stabilizer, 0.5-5% of lubricant and 0.5-5% of nucleating agent into a high-speed mixer according to mass percentage; The material mixed by the high-speed mixer is poured into the twin-screw extruder for mixing. The extruder speed is 400r.min. -1 , the screw aspect ratio is 40:1, the temperature of zone 1 is 190℃, the temperature of zone 2 is 190℃, the temperature of zone 3 is 200℃, the temperature of zone 4 is 200℃, the temperature of zone 5 is 200℃, the temperature of zone 6 is 210℃, the temperature of zone 7 is 210℃, the temperature of zone 8 is 210℃, the temperature of die head is 210℃, and the residence time of the mixture in the screw is 2 to 10min; Finally, the extruded strips are water-cooled and granulated to obtain the desired anti-powdering masterbatch-2.

5. The modified polypropylene material according to any one of claims 1 to 4, characterized in that: The melt index of the polypropylene resin is 3-100 g / 10 min, and the polypropylene resin is a homopolymer polypropylene resin or a copolymer polypropylene resin.

6. The modified polypropylene material according to any one of claims 1 to 4, characterized in that: The laser engraving masterbatch is LaserAT-8632, with a density of 1.55±0.2g / cm 3 , suitable for laser marking systems with laser wavelengths between 355-1064nm.

7. The modified polypropylene material according to any one of claims 1 to 4, characterized in that: The deodorant is JH-200A.

8. The modified polypropylene material according to any one of claims 1 to 4, characterized in that: The lubricant is at least one of zinc stearate, calcium stearate, magnesium stearate and vinyl bisstearamide.

9. The modified polypropylene material according to any one of claims 1 to 4, characterized in that: The antioxidant is at least one of antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1098, DSTDP, and antioxidant P-EPQ.

10. A method for preparing the modified polypropylene material according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) preparing raw materials according to requirements, firstly putting polypropylene resin, talcum powder, laser engraving masterbatch, and anti-powdering masterbatch into a high-speed mixer and stirring for 3 to 15 minutes for the first time, and then pouring in a deodorant, an antioxidant, a lubricant, and a toner and stirring for a second time for 2 to 5 minutes to prepare a mixture; (2) Pour the mixture in step (1) into a twin-screw extruder for mixing at a speed of 300 to 600 r.min. -1 The aspect ratio of the screw is 40:1, the temperature of each zone and the head temperature ranges from 190 to 230°C, the residence time of the mixture in the screw is 2 to 10 minutes, and finally, the extruded strips are water-cooled and granulated to obtain the required modified polypropylene material.

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