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Filled polyaryletherketone powder, production method therefor and use thereof

A polyaryletherketone powder technology, applied in the field of polyaryletherketone powder, can solve the problems of weakening powder fluidity and complicated implementation

Pending Publication Date: 2022-07-22
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The second disadvantage is that it is not possible to use a large proportion of carbon fibers in the powder for fear of impairing the flowability of said powder (good flowability is necessary for laser sintering)
Finally, the implementation of the third method is also complicated, since the proper manufacture of the powder is limited by the non-agglomeration of the spray particles, which is manifested especially in the need for an extremely fast and precise cooling system

Method used

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  • Filled polyaryletherketone powder, production method therefor and use thereof
  • Filled polyaryletherketone powder, production method therefor and use thereof
  • Filled polyaryletherketone powder, production method therefor and use thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0116] According to a first embodiment, at least one filler and at least one polyaryletherketone are dry blended and introduced into the main hopper of the extruder.

Embodiment approach

[0117] According to a more advantageous second embodiment, at least one polyaryletherketone is introduced into the main hopper, while at least one filler is introduced and added to the molten polyaryletherketone by side feed. This has the advantage of preventing excessive damage to the filler during its passage through the extruder.

[0118] Any extruder suitable for extruding high-melting polymers can be used. Furthermore, one skilled in the art can adjust the extrusion conditions depending on the polymer used. An example of an extruder is a "Labtech" twin screw extruder, wherein the screw diameter is 26 mm and the L / D ratio is 40.

[0119] The extruded mixture is subdivided to form pellets.

[0120] The pellets are then optionally heat treated to increase the crystallinity of the poly(aryl ether ketone). The reason for this is that the high crystallinity of the pellets enables the subsequent grinding steps to be facilitated. Advantageously, the PAEK fraction in the powde...

Embodiment 1

[0141] Example 1 (comparison)

[0142] The first composition used was a polyetherketoneketone with a mass ratio of T units to the sum of T and I units of 60% in 96% by mass aqueous sulfuric acid according to standard ISO 307:2019 for PAEK , has a viscosity index of 0.75 dl / g at 25°C. The polyetherketoneketone is produced by Arkema under the name Sales.

[0143] The pellets obtained from the composition according to Example 1 can be milled to obtain a D50 of 500 microns (using a Malvern Mastersizer). diffractometer).

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Abstract

The invention relates to a powder having a volume-weighted particle size distribution with a median diameter D50 in the range of 40 to 120 microns, comprising at least one polyaryletherketone and at least one filler, in which:-the at least one polyaryletherketone forms a matrix at least partially incorporated with the at least one filler, and-the at least one polyaryletherketone forms a matrix at least partially incorporated with the at least one filler, and-the at least one polyaryletherketone forms a matrix at least partially incorporated with the at least one filler. -the filler has an equivalent sphere diameter distribution in which the median diameter d '50 is less than or equal to 5 microns (based on the Stokes Law). The invention also relates to a process for the production of the powder and to the use thereof in a method for the layer-by-layer construction of objects by sintering caused by electromagnetic irradiation.

Description

technical field [0001] The present invention relates to the field of polyaryletherketone powder. [0002] More particularly, the present invention relates to filled polyaryletherketone powder, a process for its manufacture and its use in a process for the manufacture of three-dimensional objects, especially in powder sintering mediated by electromagnetic radiation process) use. Background technique [0003] Polyaryletherketone (PAEK) is a well-known high performance technical (industrial, technical) polymer. They can be used in applications that are limited in terms of temperature and / or mechanical constraints, or even chemical constraints. They can also be used in applications requiring excellent fire resistance and little smoke or toxic gas emissions. Finally, they have good biocompatibility. These polymers are found in a wide variety of fields such as the aerospace sector, offshore drilling, motor vehicles, railway sector, marine sector, wind power sector, sports, con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/10C08K3/013C08K3/26C08K3/34C08K3/36C08J3/12C08G65/40B29B7/00B29B7/90B29B9/12B29C64/153B33Y70/10
CPCC08K3/013C08K3/34C08K3/346C08K3/36C08K3/26B29B9/12B29C64/153C08G2650/40B33Y70/00C08G65/4012B29B7/90B29B7/007C08K2201/003C08J3/203C08J2371/00B29B7/726C08L71/00C08J3/12C08J3/226C08L71/12B33Y70/10C08K2201/005B33Y10/00B29C64/314B33Y40/10B29B9/10B29B9/16B29B2009/165B29K2071/00B29K2509/02
Inventor B.布鲁尔P.巴斯西
Owner ARKEMA FRANCE SA
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