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Method for Improving Toner Point of High Gloss Polypropylene Composites

A technology of composite materials and polypropylene powder, which is applied in the field of modification of polypropylene composite materials and improvement of toner points of high-gloss polypropylene composite materials. Process and other issues, to achieve the effect of good stability, high gloss, uniform and smooth surface

Active Publication Date: 2021-06-29
JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In response to this problem, in the prior art, the toner point is usually improved by adding related additives that can improve the dispersion uniformity of fillers or toners in the resin system, but this method requires the addition of new types of materials, and also needs to be considered Whether it affects the performance of the composition, manufacturing cost, production process, etc., and it is difficult to achieve good results

Method used

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  • Method for Improving Toner Point of High Gloss Polypropylene Composites

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033] Raw material formula:

[0034] 40wt.% polypropylene pellets, 40wt.% polypropylene powder, 1.0wt.% toner, 18.5wt.% filler and 0.5wt.% nucleating agent.

[0035] Preparation Process:

[0036] (1) Take polypropylene pellets, polypropylene powder, toner, filler and nucleating agent by weighing according to the formula dosage for subsequent use;

[0037] (2) After putting 5wt.% polypropylene pellets and 20wt.% polypropylene powder into the high-speed mixer, start the high-speed mixer for high-speed mixing, and then put fillers and 20wt.% of the remaining polypropylene powder into it in turn. After mixing the material, toner and nucleating agent, continue to mix at a high speed to obtain a premix; wherein the speed of the high-speed mixer for high-speed mixing is 800-900r / min;

[0038] (3) The above-mentioned obtained premix and 35wt.% of the remaining polypropylene pellets are accurately fed into the main feeding port of the twin-screw extruder through a loss-in-weight fee...

specific Embodiment 2

[0040] Raw material formula:

[0041] With specific embodiment 1.

[0042] Preparation Process:

[0043] (1) Take polypropylene pellets, polypropylene powder, toner, filler and nucleating agent by weighing according to the formula dosage for subsequent use;

[0044] (2) After putting 20wt.% polypropylene pellets and 20wt.% polypropylene powder into the high-speed mixer, start the high-speed mixer for high-speed mixing, and then put fillers and 20wt.% of the remaining polypropylene powder into it in turn. After mixing the material, toner and nucleating agent, continue to mix at a high speed to obtain a premix; wherein the speed of the high-speed mixer for high-speed mixing is 800-900r / min;

[0045] (3) The above obtained premix and 20wt.% of the remaining polypropylene pellets are respectively accurately fed into the main feeding port of the twin-screw extruder through a loss-in-weight feeder, and melted, blended and extruded by the twin-screw extruder A high-gloss polypropy...

specific Embodiment 3

[0047] Raw material formula:

[0048] 60wt.% polypropylene pellets, 20wt.% polypropylene powder, 2.0wt.% toner, 17.5wt.% filler and 0.5wt.% nucleating agent.

[0049] Preparation Process:

[0050] (1) Take polypropylene pellets, polypropylene powder, toner, filler and nucleating agent by weighing according to the formula dosage for subsequent use;

[0051] (2) After putting 10wt.% polypropylene pellets and 10wt.% polypropylene powder into the high-speed mixer, start the high-speed mixer for high-speed mixing, and then put fillers and 10wt.% of the remaining polypropylene powder into it in turn After mixing the material, toner and nucleating agent, continue to mix at a high speed to obtain a premix; wherein the speed of the high-speed mixer for high-speed mixing is 800-900r / min;

[0052] (3) The above-mentioned obtained premix and 50wt.% of the remaining polypropylene pellets are accurately fed into the main feeding port of the twin-screw extruder through a loss-in-weight fee...

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Abstract

The invention discloses a method for improving the toner point of a high-gloss polypropylene composite material. In the method, polypropylene pellets and powder are used at the same time, and the feeding sequence of the pellets, powder and filler is adjusted, and the pellets are divided into Batch or whole is added first, the powder is added in two batches, and when there is filler, the filler is added between the powders added in two batches. The whole adding process is added while mixing at high speed. In this method, the powder between The spatial dispersion of the powder is better than that of the traditional pellets and powders, and the pellets can also play a stirring role in the powder, which can fully ensure that all materials are mixed evenly. The polypropylene composite material prepared by this method does not make any changes to the types of raw material components, but only changes the shape of the same resin raw material and the process of adding the sequence, so the mechanical properties and heat resistance of the final product can be guaranteed. On the basis of no change, not only the gloss is high, the surface is uniform and smooth, no toner spots, but also the stability of the color L value is good.

Description

technical field [0001] The invention relates to a method for modifying a polypropylene composite material, in particular to a method for improving the toner point of a high-gloss polypropylene composite material, and belongs to the technical field of polymer materials and their molding and processing. Background technique [0002] Polypropylene (PP) is one of the fastest-growing varieties among the five general-purpose thermoplastic resins, and is widely used in industrial production and daily necessities. As an ideal material to replace high-gloss products such as ABS and HIPS, high-gloss polypropylene has attracted widespread interest and attention. This kind of modified polypropylene with good gloss is widely used in stationery, household appliances, and other indoor household appliances at home and abroad. [0003] In the production of polypropylene products, in order to improve product performance and dimensional stability, some fillers and additives are added, and var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B7/90B29C48/92C08L23/12C08K3/34C08K3/30
CPCB29B7/90C08K2003/3045C08L23/12C08L2201/08C08L2205/025C08K3/34C08K3/30
Inventor 赵勃王琦玲叶晓光袁绍彦张晓辉黄河生
Owner JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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