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Reflective polypropylene composite material suitable for automotive trim and preparation method of reflective polypropylene composite material

A technology for composite materials and automotive interiors, applied in the field of polypropylene composite materials and its preparation, can solve problems such as inability to highlight shapes or patterns, blurred boundaries of illuminated areas, loss of rigidity of PP materials, etc., and achieve refractive index matching , reduce the dosage, reduce the effect of rigidity loss

Pending Publication Date: 2022-05-13
SHANGHAI PRET COMPOSITES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with current reflective ambient lighting is that the boundaries of the illuminated area are blurred and cannot highlight certain well-defined shapes or patterns
Generally speaking, an increase in the content of reflective fillers is beneficial to improve the reflective effect, but the commercially available high-refractive index reflective powder has a higher density (4.2-4.5g / cm 3 , the main component is TiO 2 -BaO-SiO 2 ), and the shape of the spherical microbeads will lead to a significant loss of rigidity of the PP material (the high rigidity of the interior panel is conducive to firm assembly, no deformation and no abnormal noise when stressed), so it is necessary to add as little as possible

Method used

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  • Reflective polypropylene composite material suitable for automotive trim and preparation method of reflective polypropylene composite material
  • Reflective polypropylene composite material suitable for automotive trim and preparation method of reflective polypropylene composite material
  • Reflective polypropylene composite material suitable for automotive trim and preparation method of reflective polypropylene composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Weigh 21.8% of homopolypropylene, 25% of random copolymerized polypropylene, 15% of propylene-ethylene copolymer toughening agent, 0.3% of Negonox DSTP, 0.1% of Irganox 1010, 0.1% of Irgafos 168, light 0.2% stabilizer was dry mixed in a high-speed mixer for 8 minutes to obtain a premix.

[0035] (2) Add the premix into the twin-screw extruder from the main feeding port of the screw, add the whisker masterbatch (37.5%) through the side feeding port, and cool and granulate after melting and extruding. The process is: one zone 190-200°C, second zone 200-210°C, third zone 210-220°C, fourth zone 205-215°C; residence time 1-2min, pressure 12-18MPa.

Embodiment 2

[0037] (1) Weigh 14.3% of homopolypropylene, 25% of random copolymerized polypropylene, 15% of propylene-ethylene copolymer toughening agent, 0.3% of Negonox DSTP, 0.1% of Irganox 1010, 0.1% of Irgafos 168, light 0.2% stabilizer was dry mixed in a high-speed mixer for 8 minutes to obtain a premix.

[0038] (2) Add the premix into the twin-screw extruder from the main feeding port of the screw, add the whisker masterbatch (45%) through the side feeding port, and cool and granulate after melting and extruding. The process is: one zone 190-200°C, second zone 200-210°C, third zone 210-220°C, fourth zone 205-215°C; residence time 1-2min, pressure 12-18MPa. Example 3

Embodiment 3

[0039](1) Weigh by weight 15.8% homopolypropylene, 28% random copolymer polypropylene, 15% propylene-ethylene copolymer toughening agent, 3% reflective powder, Negonox DSTP 0.3%, Irganox 1010 0.1%, Irgafos1680 .1% and 0.2% light stabilizer were dry mixed in a high-speed mixer for 8 min to obtain a premix.

[0040] (2) The premix is ​​fed into the twin-screw extruder from the main feed port of the screw, the whisker masterbatch (37.5%) is added through the side feed port, and cooled and pelletized after being melted and extruded. The process is: one zone 190-200°C, 200-210°C in the second zone, 210-220°C in the third zone, 205-215°C in the fourth zone; residence time 1-2min, pressure 12-18MPa.

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Abstract

The invention discloses a reflective polypropylene composite material suitable for automotive interiors and a preparation method of the reflective polypropylene composite material. The polypropylene composite material is composed of the following raw materials in percentage by weight: 10-70% of homo-polypropylene; 0-45% of polypropylene random copolymer; 5-25% of a propylene-ethylene copolymer toughening agent; 10-40% of whisker master batch; 1-10% of reflective powder; 0.1-2% of an antioxidant; and 0-5% of other additives. Compared with the conventional light-proof inorganic filler (such as talcum powder, calcium carbonate and the like), the light-transmitting whisker has the advantages that the loss of light transmittance of the material can be greatly reduced on one hand, and a better stiffening effect can be achieved on the other hand; compared with common light-transmitting filler glass fibers, the crystal whiskers can avoid the size control problem caused by height orientation during injection molding of the glass fibers. The high light transmittance of the material ensures that the reflective filler in the material can fully play a role, so that the use amount of the reflective filler can be remarkably reduced.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof. The obtained material has better reflection effect on light, and belongs to the technical field of polymer material processing and modification. Background technique [0002] An important way to achieve automotive interior ambient lighting is to use a light source that does not directly hit the eyes to irradiate an area, and the light is diffusely reflected in this area, so that it is perceived by the driver and passengers, and plays a decorative and indicating role in low-light conditions. The problem with current reflective ambient lighting is that the illuminated area has blurred boundaries and cannot highlight certain well-defined shapes or patterns. To achieve a specific shape or pattern in an interior area, the conventional method is to use a light-transmitting interior panel and a backlight, and cover the surface of the interior panel with a light-shiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/16C08K7/08C08K7/20
CPCC08L23/14C08K2201/003C08K2201/004C08L23/12C08K7/08C08K7/20
Inventor 冯杨王溢巩祥壮周炳张锴蔡莹蔡青周文
Owner SHANGHAI PRET COMPOSITES
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