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Composition for additive manufacturing

A technique of additive manufacturing, composition, applied in the fabrication of fused filaments. field, which can solve problems such as sticking, water absorption is difficult to print, and has not yet achieved commercial success

Pending Publication Date: 2022-05-17
JABLIN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermoplastic elastomers such as thermoplastic polyurethane, acrylonitrile butadiene styrene (ABS) have been reported to be additively manufactured by FFF, but due to water absorption and difficulty in printing warp-free articles and causing sticking to the printer's print head and tubing Issues such as supply equipment in the system have not yet achieved substantial commercial success

Method used

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  • Composition for additive manufacturing
  • Composition for additive manufacturing
  • Composition for additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 6 and comparative example 1

[0046] CIMBAR 610D talc and TPE-70IN350 (SEBS STPE from Audia Elastomers, a triblock A-B-A polymer, melt flow rate (210 °C / 2.16kg) was: 99g / 10 minutes, referred to as SEBS in Examples and Comparative Examples), forming filaments with a diameter of about 2.85mm. As shown in Table 1, SEBS STPE exhibited shear thinning behavior at 210°C, 220°C and 230°C. Viscosity was measured using an Instron CEAST 20 capillary rheometer (Instron of Norwood, MA) with a die ratio of 20:1. Talc has a platy morphology and is reported to have a D50 of 1 micron and a D98 of 5.5 microns. Talc was loaded at 10% intervals from 10% to 60% by weight of STPE and talc (Examples 1 to 6).

[0047] Filaments were prepared from pure SEBS (Comparative Example 1) and talc-loaded compositions. 2.85 mm diameter filaments were prepared by melt extruding the compositions of Examples 1 to 6 and Comparative Example in a single screw extruder at between about 185°C and 205°C, which were wound on spools after passing ...

Embodiment 2

Embodiment 7

[0051] Examples 7 to 13 were prepared in the same manner, except that a propylene impact copolymer of propylene and ethylene prepared using a Ziegler-Natta catalyst (LyondellBasell, SEETEC M1400, specific gravity 0.9 g / cc; MFR 8 g / 10 minutes (230° C. / 2.16 kg)) were blended with STPE and talc at the weight percentages indicated in Table 3. The detailed mechanical properties of Example 10 are given in Table 2. Embodiment 7 repeats the prescription of embodiment 2. Each of these examples prints just fine. From Table 3 it is evident that the desired properties can be achieved by varying the amount of polypropylene, with more polypropylene added closer to the properties of polypropylene while still obtaining good printability. Surprisingly, even at lower STPE loadings, it is possible to approach the performance of propylene while exhibiting lower brittleness and higher impact resistance.

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Abstract

A composition useful in the manufacture of an additive article comprises a styrenic thermoplastic elastomer comprising a block copolymer comprising at least two vinyl aromatic monomer blocks and at least one conjugated diene monomer block, and a solid particulate filler dispersed therein, wherein the filler has a surface area of 0.05 m < 2 > / g to 120 m < 2 > / g. The composition may form filaments for use in fuse manufacturing additive manufacturing. The filaments exhibit good printability without drying or when stored under dry conditions.

Description

technical field [0001] This technology relates to thermoplastic compositions that can be used in additive manufacturing. In particular, the composition is useful in fused filament fabrication (FFF). Background technique [0002] Various additive manufacturing processes, also known as three-dimensional (3D) printing processes, can be used to form three-dimensional objects by fusing or adhering certain materials in specific locations and / or layers. Materials can be joined or solidified under computer control, for example, working from a computer-aided design (CAD) model, thereby utilizing materials such as liquid molecules, extruded materials including polymers, or powder particles (which can be fused and and / or additive, including layer-by-layer approaches and printhead deposition approaches) to generate three-dimensional objects. Various types of additive manufacturing processes include binder jetting, directed energy deposition, material extrusion, material jetting, powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08K3/013C08K3/04C08K3/14C08K3/34C08K3/38B29C64/118B33Y10/00B33Y70/10
CPCC08L53/02C08K3/042C08K3/346C08K3/013C08K3/14C08K3/34C08K3/38B33Y70/10B33Y10/00B29C64/118C08K2201/016C08K2201/005C08K2201/006C08K2003/385C08L53/025C08K3/04B33Y70/00C08L23/14C08L23/16B33Y30/00C08K7/00B33Y80/00B29K2009/06
Inventor T·弗莱Z·彼得森L·勒斯
Owner JABLIN INC