阅读说明：本技术 一种高流动、低收缩、低光泽度改性pp材料及其制备工艺 (High-fluidity, low-shrinkage and low-glossiness modified PP (polypropylene) material and preparation process thereof ) 是由 文江河 王志鹏 倪世茂 李敬玉 于 2021-08-17 设计创作，主要内容包括：本发明属于改性PP材料技术领域,特别涉及一种高流动、低收缩、低光泽度改性PP材料及其制备工艺,所述改性PP材料由下述重量份原料制得：PP材料60～90份,POE材料5～15份,矿物填充材料5～15份,消光剂1～2份,润滑剂0.2～0.5份,光稳定剂0.2～1份,抗氧化剂0.2～1份,色粉1～2份。本发明提供了一种高流动、低收缩、低光泽度改性PP材料及其制备工艺,通过特有的材料称比,让材料拥有高流动容易注塑成型；同时具有超高冲击,制件既有抗强度同时耐冲击不容易破裂；低密度减轻制件重量同时低收缩制件注塑成型尺寸稳定性好,给人们带来便捷。(The invention belongs to the technical field of modified PP materials, and particularly relates to a high-fluidity, low-shrinkage and low-glossiness modified PP material and a preparation process thereof, wherein the modified PP material is prepared from the following raw materials in parts by weight: 60-90 parts of PP material, 5-15 parts of POE material, 5-15 parts of mineral filling material, 1-2 parts of flatting agent, 0.2-0.5 part of lubricant, 0.2-1 part of light stabilizer, 0.2-1 part of antioxidant and 1-2 parts of toner. The invention provides a high-fluidity low-shrinkage low-glossiness modified PP material and a preparation process thereof, and the material has high fluidity and is easy to be injection molded through a specific material ratio; meanwhile, the material has ultrahigh impact, and the product has the strength and is impact-resistant and not easy to break; the low-density reduces the weight of the finished piece, and simultaneously the injection molding size stability of the low-shrinkage finished piece is good, thereby bringing convenience to people.)

1. The high-fluidity low-shrinkage low-gloss modified PP material is characterized by being prepared from the following raw materials in parts by weight:

60-90 parts of PP material, 5-15 parts of POE material, and mineral filling material: 5-15 parts of lubricant, 0.2-0.5 part of light stabilizer, 0.2-1 part of antioxidant and 1-2 parts of toner.

2. The high flow, low shrinkage, low gloss modified PP material according to claim 1, wherein: the mineral filling material is one of talcum powder and high-strength whiskers.

3. The high flow, low shrinkage, low gloss modified PP material according to claim 1, wherein: the antioxidant is one or a mixture of several of antioxidant 1010, antioxidant 168 and antioxidant 1024.

4. The high flow, low shrinkage, low gloss modified PP material according to claim 1, wherein: the lubricant is one or a mixture of more of lubricant EBS, lubricant erucamide and lubricant calcium stearate.

5. The high flow, low shrinkage, low gloss modified PP material according to claim 1, wherein: the light stabilizer is one or a mixture of more of a light stabilizer 788, a light stabilizer 5589 and a light stabilizer V703.

6. The high flow, low shrinkage, low gloss modified PP material according to claim 1, wherein: the toner is one or a mixture of more of pigment carbon black, phthalocyanine blue and black master batch 3021.

7. A preparation method of a high-fluidity, low-shrinkage and low-glossiness modified PP material is characterized by comprising the following preparation processes:

s1: weighing the materials in the raw material formula according to the weight ratio;

s2: placing a PP material, a toughening agent, a mineral filling material, a flatting agent, a lubricant, an antioxidant, a light stabilizer and toner in a punching machine according to a proportion, punching raw materials to obtain a mixture A, and uniformly stirring the mixture A for 5-10 minutes;

s3: then adjusting the extrusion temperature of the double-screw extruder to 190-210 ℃, adjusting the rotating speed of host equipment to 500-700 rpm, and placing the mixture A in a machine for extrusion to obtain a mixture B;

s4: placing the mixture B outside, and naturally cooling for 3-4 minutes;

s5: placing the cooled mixture B on a dryer, drying for 1-2 minutes, and drying the internal water;

s6: and (4) placing the dried mixture B on a double-screw extrusion granulator, and starting equipment for granulation to obtain the material.

8. The high flow, low shrinkage, low gloss modified PP material according to claim 7, wherein: the melt index of the PP material is more than 25g/10min, and the cantilever beam notch impact strength of the punch is more than 45 MPa.

9. The high flow, low shrinkage, low gloss modified PP material according to claim 7, wherein: the melt index of the toughening agent is more than 5g/10 min.

Technical Field

The invention relates to the field of modified PP materials, in particular to a high-fluidity, low-shrinkage and low-glossiness modified PP material and a preparation process thereof.

Background

Along with social development, people have stronger safety awareness, and higher requirements are also put forward on the safety of automobiles, the polypropylene material of the automotive interior trim part can reflect light to influence the sight of drivers due to higher glossiness, and the modified polypropylene material of the automotive interior trim part needs lower glossiness to improve the safety.

However, the conventional modified PP material is generally high impact, low rigidity, low flow, low gloss, low shrinkage, or high rigidity, low impact, high flow, high gloss, high shrinkage, so that the requirement of high flow in the automotive interior trim parts is limited, the automotive interior trim parts are easy to injection mold, high rigidity and ultrahigh impact are required, the parts have the strength and impact resistance, and are not easy to break, the weight of the parts is reduced by low density, the injection molded size of the low shrinkage parts is good, and the high-performance modified PP material is required to be specially prepared for the automotive interior trim parts with high requirements.

Disclosure of Invention

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a high-fluidity, low-shrinkage and low-glossiness modified PP material is prepared from the following raw materials in parts by weight:

60-90 parts of PP material, 5-15 parts of POE material, 5-15 parts of mineral filling material, 1-5 parts of flatting agent, 0.2-0.5 part of lubricant, 0.2-1 part of light stabilizer, 0.2-1 part of antioxidant and 1-2 parts of toner.

Preferably, the mineral filling material is one of talcum powder and high-strength whiskers.

Preferably, the antioxidant is one or a mixture of several of antioxidant 1010, antioxidant 168 and antioxidant 1024.

Preferably, the lubricant is one or a mixture of more of lubricant EBS, lubricant erucamide and lubricant calcium stearate.

Preferably, the light stabilizer is one or a mixture of more of light stabilizer 788, light stabilizer 5589 and light stabilizer V703.

Preferably, the toner is one or a mixture of several of pigment carbon black, phthalocyanine blue and black master batch 3021.

A preparation method of a high-fluidity, low-shrinkage and low-glossiness modified PP material is characterized by comprising the following preparation processes:

s1: weighing the materials in the raw material formula according to the weight ratio;

s2: placing a PP material, a toughening agent, a mineral filling material, a flatting agent, a lubricant, an antioxidant, a light stabilizer and toner in a punching machine according to a proportion, punching raw materials to obtain a mixture A, and uniformly stirring the mixture A for 5-10 minutes;

s3: then adjusting the extrusion temperature of the double-screw extruder to 190-210 ℃, adjusting the rotating speed of host equipment to 500-700 rpm, and placing the mixture A in a machine for extrusion to obtain a mixture B;

s4: placing the mixture B outside, and naturally cooling for 3-4 minutes;

s5: placing the cooled mixture B on a dryer, drying for 1-2 minutes, and drying the internal water;

s6: and (4) placing the dried mixture B on a double-screw extrusion granulator, and starting equipment for granulation to obtain the material.

Preferably, the melt index of the PP material is more than 25g/10min, the izod notched impact strength of the punch is more than 45MPa, and the melt index of the toughening agent is more than 5g/10 min.

Advantageous effects

According to the high-fluidity, low-shrinkage and low-gloss modified PP material and the preparation process thereof, through the material proportion of different materials, the high-fluidity, low-shrinkage and low-gloss modified PP material has strength, impact resistance and difficulty in cracking, and is compatible with both materials.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Example 1:

80 parts of PP material, 10 parts of mineral filling material, 8 parts of toughening agent, 2 parts of flatting agent, 0.2 part of lubricant erucamide, 10100.2 parts of antioxidant, 1680.2 parts of antioxidant, 0.3 part of light stabilizer and 1.5 parts of toner.

Preparation process of example 1: weighing materials in a raw material formula according to a weight ratio, placing a PP material, a toughening agent, a mineral filling material, a flatting agent, a lubricant, an antioxidant, a light stabilizer and a toner in a punching machine according to a ratio, punching the raw materials to obtain a mixture A, uniformly stirring the mixture A for 5-10 minutes, adjusting the extrusion temperature of a double-screw extruder to 190-210 ℃, adjusting the rotating speed of host equipment to 500-700 rpm, placing the mixture A in the machine to extrude to obtain a mixture B, placing the mixture B outside, naturally cooling for 3-4 minutes, placing the cooled mixture B on a drying machine, drying for 1-2 minutes, drying the internal water, placing the dried mixture B on a double-screw extrusion granulator, starting the equipment to granulate to obtain the material.

Example 2:

82 parts of PP material, 10 parts of mineral filling material, 8 parts of toughening agent, 0.2 part of lubricant erucamide, 10100.2 parts of antioxidant, 1680.2 parts of antioxidant, 0.3 part of light stabilizer and 1.5 parts of toner.

Preparation process of example 2: weighing materials in a raw material formula according to a weight ratio, placing the materials in a punching machine, punching the raw materials to obtain a mixture A, uniformly stirring the mixture A for 5-10 minutes, adjusting the extrusion temperature of a double-screw extruder to 190-210 ℃, adjusting the rotating speed of host equipment to 500-700 rpm, placing the mixture A in the machine to extrude to obtain a mixture B, placing the mixture B outside, naturally cooling for 3-4 minutes, placing the cooled mixture B on a drying machine, drying for 1-2 minutes, drying the internal water, placing the dried mixture B on a double-screw extrusion granulator, and starting the equipment to granulate to obtain the material.

Example 3:

77 parts of PP material, 10 parts of mineral filling material, 13 parts of toughening agent, 2 parts of flatting agent, 0.2 part of lubricant erucamide, 10100.2 parts of antioxidant, 1680.2 parts of antioxidant, 0.3 part of light stabilizer and 1.5 parts of toner.

Preparation process of example 3: weighing materials in a raw material formula according to a weight ratio, placing the materials in a punching machine, punching the raw materials to obtain a mixture A, uniformly stirring the mixture A for 5-10 minutes, adjusting the extrusion temperature of a double-screw extruder to 190-210 ℃, adjusting the rotating speed of host equipment to 500-700 rpm, placing the mixture A in the machine to extrude to obtain a mixture B, placing the mixture B outside, naturally cooling for 3-4 minutes, placing the cooled mixture B on a drying machine, drying for 1-2 minutes, drying the internal water, placing the dried mixture B on a double-screw extrusion granulator, and starting the equipment to granulate to obtain the material.

Comparative example 1:

different from the embodiment 1, the content ratio of the flatting agent is increased, the content ratio of the PP material is reduced, and other conditions are not changed.

Comparative example 2:

different from the embodiment 2, the PP material content is increased, the toughening agent content is reduced, and other conditions are not changed.

And (3) performance testing: melt index: measured according to the national standard GB/T3682 method, the detection conditions are as follows: 230 ℃ and 2.16 KG; notched izod impact strength: measured according to the method of national standard GB/T1843, the detection conditions are as follows: a-shaped notch, 2.75J pendulum bob; flexural modulus: according to the national standard GB/T9341, the detection conditions are as follows: 2 mm/min; density: according to the national standard GB/T1033; shrinkage rate: according to the national standard GB/T17037; gloss: according to the national standard GB/T880745 degree angle.

The test results for example 1 were: the melt index was 33.5g/10min and the density was 0.968g/cm³The notched impact strength of the cantilever beam is 46.1kJ/m²The flexural modulus is 2188MPa, the glossiness is 29 and the shrinkage is 0.7 percent;

the test results for example 2 were: the melt index is 32.8g/10min, and the density is 0.966g/cm³The notched impact strength of the cantilever beam is 46.4kJ/m²Flexural modulus of 2172MPa, gloss of 48 and shrinkage of 0.7%;

the test results for example 3 were: the melt index was 30.7g/10min and the density was 0.967g/cm³The notched impact strength of the cantilever beam is 51.5kJ/m²The flexural modulus is 2011MPa, the glossiness is 28, and the shrinkage rate is 0.82%;

the test results for comparative example 1 were: the melt index was 27.6g/10min and the density was 0.968g/cm³The notched impact strength of the cantilever beam is 47.5kJ/m²The flexural modulus is 2167MPa, the glossiness is 23, and the shrinkage rate is 0.69%;

the test results for comparative example 2 were: the melt index was 29.3g/10min and the density was 0.966g/cm³The notched impact strength of the cantilever beam is 42.7kJ/m²The flexural modulus is 2065MPa, the glossiness is 49, and the shrinkage rate is 0.75%;

the following table 1 shows the properties of the modified PP materials obtained in examples 1 to 3 and comparative examples 1 to 2:

the foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.