Tunnel segment gasket
Tunnel segment gasket
Tunnel segment gasket
Tunnel segment gasket

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Tunnel segment gasket has two types of materials: EPDM and hydrophilic rubber.  The general shape of porous can reduce the compression assembly stress, has good resistance to compression stress relaxation performance, can prolong the service life of the rubber sealing pad. It has double performance of water swelling : elastic sealing and water expansive.


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Property


Items

Hydrophilic rubber 

PZ-150

PZ-250

PZ-400

PZ-600

Hardness                     Shore A

42±7

42±7

45±7

48±7

Tensile strength         Mpa ≥

3.5

3.5

3

3

Elongation                   %≥

450

450

350

350

Expansion rate            %  

150

250

400

600

 

Repeated immersion test

Tensile strength    Mpa≥

3

3

2

2

Expansionary         %

350

350

250

250

Expansion rate   % ≥

150

250

300

500

Low temperature brittleness (-20℃x2h)

No crack

           Items

          EPDM

Hardness                         Shore A

            60±5

Tensile strength             Mpa ≥

            15

Elongation                      %≥

            450

Compression set  (-70℃x24h)    %≤

            25

Low temperature brittleness      ℃≤

            -50

Hot air aging

(-70℃x96h)

Tensile strength  Mpa≥

            12

Elongation   % ≥

            350

Hardness change 

               ±10

Features


1)       Co-extruded rubber

2)       Excellent flexibility and good resistance to aging, chemical medium and ozone

3)       Play a good waterproof performance and weather resistant property in a big temperature range

4)       Profiles could be designed according to concrete segment structure

5)       Hydrophilic EPDM sealing gasket gives a “double-insurance” sealing to the concrete segment. Once EPDM gasket is leaked, hydrophilic rubber strip will slowly expand by swelling water to prevent water in, playing a second waterproof role.


cuijin@shuanglinrubber.com cuijin789 008618831898808