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Hydrolysis Resistance of PEEK

Views: 25     Author: Site Editor     Publish Time: 2020-03-20      Origin: Site

  1. PEEK has good heat and water resistance and steam resistance among all engineering plastics. PEEK polymer and its composite products (i.e. filled with glass fiber, carbon fiber, graphite, PTFE, etc.) can resist the chemical damage caused by water or high pressure steam, can be continuously used in hot water and high pressure steam conditions, and still maintain good mechanical properties.

  2. The good hydrolysis resistance of PEEK and its composite products can be repeatedly subjected to high temperature and high pressure steam disinfection, which can not be sustained by other thermoplastics for a long time, so PEEK has been successfully used in harsh parts of therapeutic instruments and other fields.

  3. PEEK and its composite materials under the steam conditions of 200℃ and 1.4MPa mechanical properties change detection data:

mechanical

Test standard


indicators

requirements


Time of measurement results (in hours)

75

350

1000

2000

2500

tensile strength

(MPa)


PEEK5600G

ISO527

92

95

97

97

97

97


PEEK5600GF30

134

98

93

90

92

89

bending strength

(MPa)

PEEK5600G

ISO178

142

162

165

159

169

156


PEEK5600GF30

216

177

164

167

167

166

Bending modulus

(GPa)

PEEK5600G

ISO178

3.7

4

4

3.8

4

3.6


PEEK5600GF30

9.8

9.1

8.3

9

8.9

8.7

elongation at break

(%)

PEEK5600G

ISO527

40

15

15

12

7

9


PEEK5600GF30

3

3

3

3

3

3

  4. The test shows that: PEEK polymer and its composite products can be used in high temperature and high pressure steam for medium and long-term continuous, little change mechanical properties, mechanical properties of the original work for a period of time will increase, mainly because of PEEK parts in injection molding process the release of stress, and with the increase of temperature of PEEK parts, the equivalent of PEEK parts for the heat treatment, The crystallinity is further improved.

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