Extrusion-grade highly filled polypropylene composite material and preparation method thereof

A composite material and extrusion-grade technology, applied in the field of materials, can solve problems such as composite modified polypropylene performance defects, unsatisfactory melt strength, etc., and achieve excellent bending resistance, good dimensional stability, and easy processing.

Inactive Publication Date: 2015-03-11
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the performance defects of the existing composite modified polypropylene, and the melt strength cannot meet the requirements of extrusion processing, and proposes an extrusion-grade high-filling polypropylene composite material and its preparation method. The obtained material has balanced properties and good properties. Rigid toughness and good melt strength

Method used

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  • Extrusion-grade highly filled polypropylene composite material and preparation method thereof
  • Extrusion-grade highly filled polypropylene composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] This embodiment prepares extrusion-grade high-fill PP composite material according to the following methods and ratios:

[0017] (1) 70KG Beijing Yanshan Petrochemical Polypropylene, 30KG 3000-4000 mesh ultra-fine compressed talc powder, 1010200g antioxidant, 168200g antioxidant, 3KG 50% silicone masterbatch, mixed for 5min at 150rpm in the mixer, A homogeneous blend is obtained.

[0018] (2) Put the blended material from the previous step into the twin-screw extruder from the main feeding port for extrusion processing. The temperature of each zone of the extruder is set to 190°C in the first zone, 200°C in the second zone, 210°C in the third zone, and 210°C in the fourth zone. 220°C, extrusion die 220°C, screw speed 350rpm. After cooling in a water tank, air-cooled and blow-dried, pelletized to obtain extrusion-grade high-filling PP composite materials.

[0019] Table 1 shows the properties of the above-prepared materials after injection molding and conditioning for ...

Embodiment 2

[0024] This embodiment prepares extrusion-grade high-fill PP composite material according to the following methods and ratios:

[0025] (1) 55KG Beijing Yanshan Petrochemical Polypropylene, 45KG 3000-4000 mesh ultra-fine compressed talc powder, 1010250g antioxidant, 168250g antioxidant, 4KG 50% silicone masterbatch, mixed 7min at 150rpm in the mixer, A homogeneous blend is obtained.

[0026] (2) Put the blended material from the previous step into the twin-screw extruder from the main feeding port for extrusion processing. The temperature of each zone of the extruder is set to 200°C in the first zone, 210°C in the second zone, 220°C in the third zone, and 220°C in the fourth zone. 220°C, extrusion die 225°C, screw speed 350rpm. After cooling in a water tank, air-cooled and blow-dried, pelletized to obtain extrusion-grade high-filling PP composite materials.

[0027] Table 2 shows the properties of the above-prepared materials after injection molding and conditioning for 24 h...

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Abstract

The invention relates to a composite material and a preparation method thereof, particularly relates to an extrusion-grade highly filled polypropylene composite material and a preparation method thereof, and belongs to the technical field of materials. The extrusion-grade highly filled polypropylene composite material comprises the following raw materials in percentage by weight: 48-70% of PP resin, 27-45% of superfine compressed talcum powder, 0.1-2% of an antioxidant and 2-5% of a dispersing agent. The extrusion-grade highly filled polypropylene composite material and the preparation method thereof have the benefit that the prepared material has excellent bending resistance and favorable size stability (relatively low shrinking percentage), is easy to process, smooth and free of pocking marks on the surfaces of extruded sections, and tidy in fracture surface, has a favorable caking property with rubber, has no foreign smell and accords with the requirement of ROHS environmental protection.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to an extrusion-grade high-filling polypropylene composite material and a preparation method thereof, belonging to the field of material technology. Background technique [0002] Polypropylene is a thermoplastic material with good toughness. It is generally used for injection molding. It has low melt strength and poor rigidity. It is not suitable for extruded door and window trims that require high strength and toughness. The existing extruded door and window trim strips are mainly made of thermoplastic elastomers, but the rigidity of thermoplastic elastomers is extremely poor, so metal sheets (mainly iron) are added to the extruded parts for reinforcement, but metal sheets The material will corrode, which will eventually affect the performance of the part. [0003] Composite modification of conventional polypropylene materials mainly enhances and modifies on...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L83/04C08K9/00C08K3/34B29B9/06B29C47/92B29C48/92
CPCC08L23/12B29B9/06B29C48/92C08L83/04C08K3/346C08K5/1345C08K5/526
Inventor 鲍文龙吴汾
Owner NANJING JULONG SCI&TECH CO LTD
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