Thermoplastic natural rubber (TPNR) as a backbone polymer for metal injection molding

Norita Hassan, Sahrim Ahmad, Norhamidi Muhamad, Mohd Afian Omar, Noor Azlina Hassan

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Moldability of metal injection molding (MIM) is dependent on the outward appearance of the resultant feedstock. Properties of the binders used will influence the properties of the feedstock. Stainless steel powder 316L with mean size 22 μm and the binder system consists of three major fractions of paraffin wax, thermoplastic natural rubber and stearic acid with a powder loading of 65 vol. % was investigated. Comparison was also made with existing palm stearin in the binder system replacing the paraffin wax. Kinetic solvent extractions were done to determine the differences between the binder systems. The feedstock was then injected into tensile bar using vertical injection machine. The results showed that there is a slightly time extension during the solvent extraction as a comparison. The feedstock has been successfully injection molded at 190-200°C. Study of thermal analysis such as DSC and TGA has been done as a preparation for the thermal debinding and sintering process. This study demonstrated that a backbone polymer; thermoplastic natural rubber performs best in term of flow stability and compact quality and also saves in processing time.

Original languageEnglish
Pages (from-to)1787-1791
Number of pages5
JournalSains Malaysiana
Volume42
Issue number12
Publication statusPublished - Dec 2013

Fingerprint

Metal molding
Injection molding
Feedstocks
Thermoplastics
Binders
Rubber
Paraffin waxes
Solvent extraction
Polymers
Powders
Stearic acid
Thermoanalysis
Sintering
Stainless steel
Kinetics
Processing

Keywords

  • Backbone polymer
  • Metal injection molding (MIM)
  • Thermal analysis
  • Thermoplastic natural rubber

ASJC Scopus subject areas

  • General

Cite this

Thermoplastic natural rubber (TPNR) as a backbone polymer for metal injection molding. / Hassan, Norita; Ahmad, Sahrim; Muhamad, Norhamidi; Omar, Mohd Afian; Hassan, Noor Azlina.

In: Sains Malaysiana, Vol. 42, No. 12, 12.2013, p. 1787-1791.

Research output: Contribution to journalArticle

Hassan, Norita ; Ahmad, Sahrim ; Muhamad, Norhamidi ; Omar, Mohd Afian ; Hassan, Noor Azlina. / Thermoplastic natural rubber (TPNR) as a backbone polymer for metal injection molding. In: Sains Malaysiana. 2013 ; Vol. 42, No. 12. pp. 1787-1791.
@article{adaf5f538e81444ab4ad359660383eb2,
title = "Thermoplastic natural rubber (TPNR) as a backbone polymer for metal injection molding",
abstract = "Moldability of metal injection molding (MIM) is dependent on the outward appearance of the resultant feedstock. Properties of the binders used will influence the properties of the feedstock. Stainless steel powder 316L with mean size 22 μm and the binder system consists of three major fractions of paraffin wax, thermoplastic natural rubber and stearic acid with a powder loading of 65 vol. {\%} was investigated. Comparison was also made with existing palm stearin in the binder system replacing the paraffin wax. Kinetic solvent extractions were done to determine the differences between the binder systems. The feedstock was then injected into tensile bar using vertical injection machine. The results showed that there is a slightly time extension during the solvent extraction as a comparison. The feedstock has been successfully injection molded at 190-200°C. Study of thermal analysis such as DSC and TGA has been done as a preparation for the thermal debinding and sintering process. This study demonstrated that a backbone polymer; thermoplastic natural rubber performs best in term of flow stability and compact quality and also saves in processing time.",
keywords = "Backbone polymer, Metal injection molding (MIM), Thermal analysis, Thermoplastic natural rubber",
author = "Norita Hassan and Sahrim Ahmad and Norhamidi Muhamad and Omar, {Mohd Afian} and Hassan, {Noor Azlina}",
year = "2013",
month = "12",
language = "English",
volume = "42",
pages = "1787--1791",
journal = "Sains Malaysiana",
issn = "0126-6039",
publisher = "Penerbit Universiti Kebangsaan Malaysia",
number = "12",

}

TY - JOUR

T1 - Thermoplastic natural rubber (TPNR) as a backbone polymer for metal injection molding

AU - Hassan, Norita

AU - Ahmad, Sahrim

AU - Muhamad, Norhamidi

AU - Omar, Mohd Afian

AU - Hassan, Noor Azlina

PY - 2013/12

Y1 - 2013/12

N2 - Moldability of metal injection molding (MIM) is dependent on the outward appearance of the resultant feedstock. Properties of the binders used will influence the properties of the feedstock. Stainless steel powder 316L with mean size 22 μm and the binder system consists of three major fractions of paraffin wax, thermoplastic natural rubber and stearic acid with a powder loading of 65 vol. % was investigated. Comparison was also made with existing palm stearin in the binder system replacing the paraffin wax. Kinetic solvent extractions were done to determine the differences between the binder systems. The feedstock was then injected into tensile bar using vertical injection machine. The results showed that there is a slightly time extension during the solvent extraction as a comparison. The feedstock has been successfully injection molded at 190-200°C. Study of thermal analysis such as DSC and TGA has been done as a preparation for the thermal debinding and sintering process. This study demonstrated that a backbone polymer; thermoplastic natural rubber performs best in term of flow stability and compact quality and also saves in processing time.

AB - Moldability of metal injection molding (MIM) is dependent on the outward appearance of the resultant feedstock. Properties of the binders used will influence the properties of the feedstock. Stainless steel powder 316L with mean size 22 μm and the binder system consists of three major fractions of paraffin wax, thermoplastic natural rubber and stearic acid with a powder loading of 65 vol. % was investigated. Comparison was also made with existing palm stearin in the binder system replacing the paraffin wax. Kinetic solvent extractions were done to determine the differences between the binder systems. The feedstock was then injected into tensile bar using vertical injection machine. The results showed that there is a slightly time extension during the solvent extraction as a comparison. The feedstock has been successfully injection molded at 190-200°C. Study of thermal analysis such as DSC and TGA has been done as a preparation for the thermal debinding and sintering process. This study demonstrated that a backbone polymer; thermoplastic natural rubber performs best in term of flow stability and compact quality and also saves in processing time.

KW - Backbone polymer

KW - Metal injection molding (MIM)

KW - Thermal analysis

KW - Thermoplastic natural rubber

UR - http://www.scopus.com/inward/record.url?scp=84892153734&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892153734&partnerID=8YFLogxK

M3 - Article

VL - 42

SP - 1787

EP - 1791

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 12

ER -