Vespel SP-1 Vs. Meldin 7001

vespel® SP-1 & Meldin® 7001 Polyimide Rods Comparative Material Data Sheets – ISO Properties

Vespel® SP-1 Overview from DuPont:

Made from DuPont`s unfilled base polyimide resin, Vespel® SP-1 provides maximum physical strength, elongation and toughness, combined with best electrical and thermal insulation properties of all Vespel grades.

Typical applications include spacers, soldering fixtures, valve seats, balls, gaskets, poppets and static seals.

SP-1 VESPEL

Meldin® 7001 Overview from Saint Gobain:

Made from Saint Gobain`s unfilled polyimide base resin, Meldin® 7001 grade offers the maximum mechanical

properties and high chemical resistance in a thermosetting polyimide. Meldin 7001 is ideal for electrical and

thermal insulating applications. More ductile than ceramics, and lighter weight than metals, Meldin 7001 is a

popular choice for structural parts in aerospace and other applications where metal replacement is desirable.

meldin 7001

Property	ASTM Method	Units	Vespel® SP-1	Meldin® 7001
Mechanical
Tensile strength 73℉(23℃)	D-638	psi(Mpa)	---	12,500(86)
Tensile strength 73℉(23℃)	D-1708	Mpa(kpsi)	86.2(12.5)	---
Tensile strength 500℉(260℃)	D-638	psi(Mpa)	---	5,400(37)
Tensile strength 500℉(260℃)	D-1708	Mpa(kpsi)	41.4(6.0)	---
Elongation 73℉(23℃)	D-638	%	---	7.5
Elongation 500℉(260℃)	D-638	%	---	4.5
Flexural Strength 73℉(23℃)	D-790	psi(Mpa)	---	15,200(105)
Flexural Strength 73℉(23℃)	D-790	Mpa(kpsi)	11 0.3 (16.0)	---
Flexural Modulus 73℉(23℃)	D-790	psi x 105(Gpa)	---	4.6(3.2)
Flexural Modulus 73℉(23℃)	D-790	Mpa(kpsi)	310 2 (450)
Compressive Stress 1% Strain	D-695	psi(Mpa)	3,600 (24.8)	3,300(22.7)
Compressive Stress 10% Strain	D-695	psi(Mpa)	19,300(133.1)	18,000(124)
Compressive Modulus	D-695	psi x 105 (Gpa)	---	2.9(2.0)
Compressive Modulus	D-695	Mpa (kpsi)	2413(350)	---
Poisson's Ratio 73℉(23℃)			0.41	0.33
Thermal
Coefficient of Linear Expansion 75℉ to 500℉(24℃ to 260℃)	E-831	in/in/℉ x 105 (m/m/℃)	---	2.7(5.0)
Coefficient of Linear Expansion 73℉ to 500℉(23℃ to 260℃)	D-696	in/in/℉ (m/m/℃)	45 (25) 54(30)	---
Electrical
Dielectric Strength	D-149	V/Mil	320	450
Dielectric Strength	D-149	MV/m	22	18
Other
Specific Gravity	D-792
Water Absorption			1.43	1.43
24 Hours 73℉(23℃)	D-570	%	0.24	0.23
48 Hours 122℉(50℃)	D-570	%	0.72	---
Equilibrium , 50% RH	D-570	%	1.0-1.3	---
Specification Qualifications
ASTM D 6455-99		Satisfies	Type 1M	Type 1M
AMS SAE 3644G		Satisfies	Class 1, Form M	Class 1, Form M
MIL-R-46198 Resin,Polyimide ,Hot Pressed or Pressed and Sintered		Satisfies	Type 1M	Type 1M

Results bassed on published factory data sheets for isostatically produced rods

This data falls within the normal range of properties but should not to used to establish specification limits nor used alone as the basis of

design. Professional Plastics assumes no obligation or liability for any advice furnished by it or for results obtained with respect to these

products. Actual properties may vary. Isostatic rod properties shown above exceed those of compression-molded or direct-formed parts.

DuPont & Saint Gobain each perform tests to different ASTM specifications so certain side-by-side comparisons were not available.

• Vespel® is a registered trade name of EI DuPont DeNemours

• Vespel® Data Source: http://www2.dupont.com/Vespel/en_US/assets/downloads/vespel_s/Vespel_SP-1_ISO.pdf

• Meldin® is a registered trade name of Saint Gobain Performance Plastics