Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polymer composition for selective sintering

A technology of polymers and compositions, applied in the direction of 3D object support structure, processing and manufacturing, manufacturing tools, etc., can solve the problems of no continuous use temperature, no high melting point, etc.

Active Publication Date: 2021-05-11
SABIC GLOBAL TECH BV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyesters disclosed in this publication are prepared by polycondensation of dihydric or polyhydric aliphatic alcohols and aliphatic dicarboxylic acids, do not have the desired high melting point, and thus do not have the desired continuous use temperature > 100°C

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer composition for selective sintering
  • Polymer composition for selective sintering
  • Polymer composition for selective sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] Example 1 represents an embodiment of the invention, and Examples 2-4 are included for comparative purposes.

[0154] Subject the above materials to use including CO 2 Selective laser sintering method of Mini-SLS machine with laser source. During each laser sintering process, 4 square plates of 30x30x2 mm are produced. 0.05% by weight of Aerosil 200 flow promoter was added to each powder. The material was pre-dried and then processed via SLS. The SLS method is carried out in an atmosphere with an oxygen content of ≦1.0% by weight. The SLS method conditions are shown in Table 2. The moisture content of the atmosphere is <50ppm.

[0155] Table 2: SLS Processing Conditions

[0156] Example 1 2(C) 3(C) 4(C) Powder bed temperature (℃) 225 173 140 213 Piston temperature (℃) 185 135 65 170 Cylinder temperature (℃) 145 110 65 180 Feed temperature (°C) 160 120 70 160 Laser power (W) 30 21 21 9 Scanning speed (m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
crystallization timeaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
enthalpy of fusionaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a polymer composition for the production of shaped objects via selective laser sintering, wherein the polymer composition comprises a thermoplastic material having: -≥30s and ≤12min below the peak melting temperature The semi-crystallization time when supercooled at 50°C, wherein the semi-crystallization time t 1 / 2,c Glass transition temperature T measured by differential scanning calorimetry according to ISO 11357‑1 (2009); -≥50°C g , determined according to ISO 11357‑2(2013); -≥200℃ peak melting temperature T p,m , according to ISO 11357‑3 (2011), measured in the first heating run; - at the extrapolated first cooling run crystallization end temperature T ef,c Above the extrapolated first heating run melting onset temperature T ≥ 5°C ei,m , determined according to ISO 11357-1 (2009), first heating and cooling operation; and- a degree of crystallinity ≥ 10.0% determined according to formula (I), where - D = crystallinity (%) of the thermoplastic material ;‑ΔH f = enthalpy of fusion of the thermoplastic material, determined according to ISO 11357-3 (2011); -ΔH f,100 = enthalpy of fusion of the thermoplastic material in the 100% crystalline state. Such polymer compositions have continuous use temperatures > 100°C and low molecular weight changes during exposure to selective laser sintering processing temperatures.

Description

technical field [0001] The present invention relates to polymer compositions for selective sintering. The invention also relates to a method for producing shaped objects via selective sintering using the polymer composition according to the invention. The invention furthermore relates to shaped objects produced via selective sintering using the polymer composition according to the invention. Background technique [0002] Selective sintering is an emerging technology that allows the production of complex three-dimensional objects. Currently, one of the main manufacturing techniques for such three-dimensional objects is via injection moulding. However, injection molding involves the use of expensive molds, so injection molding is an efficient manufacturing technique when the quantity of objects produced using the molds is large enough. For the production of smaller series of objects, the production costs are prohibitive. Therefore, alternative manufacturing techniques are ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183B29C64/153B33Y10/00B33Y70/10C08J9/24
CPCB33Y70/00B33Y10/00B29C64/153C08G63/183B33Y80/00B29C64/35B29K2067/003B29K2509/02B29K2509/10C08G2250/00
Inventor Z·巴什尔顾昊
Owner SABIC GLOBAL TECH BV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com