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Composite materials for use in injection moulding methods

A technology of composite materials and thermoplastic polymers, applied in the field of composite materials, can solve the problems that composite materials are not suitable for fine structures

Inactive Publication Date: 2015-10-28
WKP PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long fiber lengths make composites unsuitable for fine-grained structures

Method used

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  • Composite materials for use in injection moulding methods
  • Composite materials for use in injection moulding methods
  • Composite materials for use in injection moulding methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In a first example, the following composition was used for five inventive composite materials 1.A, 1.B, 1.C, 1.D, 1.E: 10% by weight of polyamide PA12 as polymer group 80% by weight of metal powder A, B, C, D or E according to Table 1 (here, the letter of each material indicates the metal powder used) as the first filling component, 8% by weight of fiber length is Wollastonite with a fiber diameter of about 250 μm and about 15 μm as the second filling component and 2% by weight of 3-aminopropyltriethoxysilane and 3-(2,3-glycidoxy) Propyltrimethoxysilane is a tackifier component in a 1:1 weight ratio.

[0045] Table 1A

[0046] Composition number Polymer [wt%] Metal [wt%] Wollastonite [wt%] Tackifier [wt%] 1.A, 1.B (Metal: Bronze) 10 80 8 2 1.C (Metal: Brass) 10 80 8 2 1.D, 1.E (Metal: Copper) 10 80 8 2

[0047] Polyamide PA12 is a thermoplastic polymer composed of 12-aminododecanoic acid monomers. It has been known for...

Embodiment 2

[0071] In another embodiment, the weight content of the components is varied. Compositions 2.A to 2.E of the composite material according to the invention are composed as follows: 8% by weight of polyamide PA12 as polymer component, 85% by weight of metal powders A, B, C, D or E according to Table 1 as First filling component, 5% by weight of wollastonite with a fiber length of about 250 μm and a fiber diameter of about 15 μm as the second filling component and 2% by weight of 3-aminopropyltriethoxysilane and 3-(2,3-Glycidoxy)propyltrimethoxysilane is a tackifier component in a 1:1 weight ratio. According to volume content conversion, it obtains the composition listed in Table 4:

[0072] Table 4

[0073] Composition number Polymer [vol%] Metal [vol%] Wollastonite [vol%] Tackifier [vol%] Density [g / cm 3 ] 2.A, 2.B (Bronze) 33.1 50.2 8.4 8.3 4.7 2.C (brass) 34.1 48.6 8.7 8.5 4.9 2.D, 2.E (copper) 35 47.4 8.9 8.7 5.0

[0...

Embodiment 3

[0079] In yet another embodiment, compositions 3.A to 3.E of the composite material according to the invention each comprise 13% by weight of polyamide PA12 as polymer component, 70% by weight of metal powders A, B according to Table 1 , C, D or E as the first filling component, 15% by weight of wollastonite with a fiber length of about 250 μm and a fiber diameter of about 15 μm as the second filling component and 2% by weight of 3-aminopropyl A tackifier component composed of triethoxysilane and 3-(2,3-glycidoxy)propyltrimethoxysilane in a weight ratio of 1:1. Table 6 below contains compositions converted according to volume content:

[0080] Table 6

[0081] Composition number Polymer [vol%] Metal [vol%] Wollastonite [vol%] Tackifier [vol%] Density [g / cm 3 ] 3.A, 3.B (Bronze) 41.8 32.1 19.6 6.4 3.7 3.C (brass) 42.6 30.8 20 6.6 3.7 3.D, 3.E (copper) 43.3 29.7 20.3 6.7 3.8

[0082] Corresponding to the lower metal conten...

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Abstract

Composite material comprises a polymer matrix component and a particulate filler component. The composite material comprises 20-50 vol.% thermoplastic polymer, 15-60 vol.% first particulate filler component, 5-30 vol.% second particulate filler component, and 1-15 vol.% coupling agent. The first filler component comprises powdered metals, metal alloys, metal oxides, covalent carbides and / or metal-type carbides. The second filler component comprises inorganic and / or mineral material in powder form. An independent claim is also included for a kit for producing the composite material, comprising the individual components of the composite material in a separated form, and / or in a mixed and unprocessed form.

Description

technical field [0001] The present invention relates to composite materials having a polymeric matrix and inorganic fillers. Background technique [0002] Plastics - The injection molding method has proven to be advantageous for the cost-effective manufacture of plastic workpieces in high volumes. It allows parts to be manufactured with high precision and / or high production rates. With suitable injection molding tools, complex geometries can be realized, and internal threads and other recessed structures can also be produced. Components made of different plastic types can likewise be produced in one process step. [0003] The strength of the workpiece produced in the injection molding method is derived from the plastic composition used. The plastic used must be thermoplastic so that it can be introduced as a liquid melt under high pressure into the injection mold and then solidified there. For injection molding, thermoplastic polymers are used, for example, polypropylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/04C08K3/10C08K3/14C08K3/36C08K3/40
CPCC08L77/00C08K3/08C08K3/14C08K3/22C08K3/34C08K3/346C08K5/5435C08K5/544C08K7/14C08L77/02C08L2207/04C08K7/10C08L51/06
Inventor M.迈基施
Owner WKP PROD
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