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1.
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masterbatches, which not only can alter the resultant properties of the substrate, but also the surface chemistry.
Table 1: Novel Non-Drying Overmold TPE
Shore A Hardness(10 second delay) 57
Specific Gravity(g/cm3) 1.05
Color Natural
300% Modulus(MPa) 2.87
Tensile Strength(MPa) 3.24
Elongation at Break (%) 400
90° Deg., Peel ASA (N/mm) 2.72
90° Deg., Peel SAN (N/mm) 2.72
90° Deg.
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Drying non-halogenated materials is suggested.
2 hours @ 100 (38)
Moisture Range
(%)
Not required
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These highly
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Figure 1
Surface energy of various thermoplastic elastomers with rigid thermoplastics
Engineering
Plastics
Polyamide 6,6
ABS
Polycarbonate
Acrylic
Polystyrene
Polypropylene
Polyethylene
Elastomers
COPA
TPU
COPE
S-TPE
TPV
mPE
Surface
Energy (mN/m)
46
43
40
37
34
31
28
Figure 2
Schematic diagram of the peel test
Table I
Physical property of TPE-1
Shore A Hardness (10 second delay) 44
Specific Gravity (g/cm3) 0.90
Color Natural
300 % Modulus (PSI) 348
Tensile Strength (PSI) 603
Elongation at Break (%) 598
Tear Strength (lbf/in) 110
Table II
Adhesion value of TPE-1 on different substrates
Substrate
Average Peel Strength
(lbf) Failure Type
PP 17 Cohesive
Copolyester 13 Adhesive
PET 13 Adhesive
PPE/HIPS 18 Adhesive
PMMA 15 Adhesive
PS 18 Adhesive
PC 17 Adhesive
PC/ABS 14 Adhesive
HIPS 13 Adhesive
ABS 13 Adhesive
Table III
Properties and peel strength of TPE-2 materials
15.37Nylon
11.16.5POM
227Polyester
22.619PC/ABS
24.5-ABS
20.828PP
Peel Strength (PIL)
713721Tensile Elongation (%):
10811010Tensile Strength (psi):
5651Hardness:
BA
15.37Nylon
11.16.5POM
227Polyester
22.619PC/ABS
24.5-ABS
20.828PP
Peel Strength (PIL)
713721Tensile Elongation (%):
10811010Tensile Strength (psi):
5651Hardness:
BA
Figure 3
Capillary viscosity of TPE-1 and -2 at 200°C
1.00E+00
1.00E+01
1.00E+02
1.00E+03
1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05
Shear rate (1/sec)
Vi
sc
os
ity
(P
a*
se
c)
TPE-1 TPE-2A TPE-2B
GLS Corporation
Abstract
Introduction
Experimental
Material
Two classes of “universal overmolding TPEs” have been developed and used in this study.