PROPERTIES

NYLON

DELRIN

UHMW PE

HDPE

POLYPROPYLENE

Specific gravity

1.13

1.45

0.94

0.96

0.9

Tensile strength p.s.i.

10,200-12,000

10,000

2,500

3,100-5,500

3,200-5,300

Flexural strength p.s.I.

8,000-16,000

14,100

1,000

1,000

-

Compressive strength, %

6,700-9,700

18,000

2,400

2,400

8,500-10,000

Izod impact, ft-lb/in

1.0-3.6

2

No break

1.5-12

0.6-6.0

Hardness, rockwell

R111-R118

R118

R38

D60-D70[shore]

R85-R110

Elongation %

90-320

75

5

15-100

200-700

Water absorbtion, %
[24 hr.,1/8 thickness]

1.9-3.3

0

0

Less than0.01

Less than0.01

Modulus of elasticity in tension. 10p.s.I

1.5-3.6

4

1

0.8-1.5

1.3-2.0

Resistance to heat, F

175

185-250

250

250

250-320

Effect of strong acids

Attacked

Attacked

Attacked slowly by oxidizing acids

Attacked slowly by oxidizing acids

Attacked slowly by oxidizing acids

Effect of strong alkalies

None

Attacked

Very resistant

Very resistant

Very resistant