Model SDSC-1200 Series :
Slitting Jig Vulcanized
Rubber Tear Test Specimen
(Jointly developed product with Shin-Etsu Chemical Co., Ltd.)

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Jointly developed product with Shin-Etsu Chemical Co., Ltd.

This is the special tool to cut a slit of the specified dimension to the test specimen.
Unlike conventional type, the slit can be certainly cut as specified to the soft material like silicone rubber.
Because, the blade edge slides to cut like an arc.

Model SDSC-1200NJ for JIS K6252, ISO 34-1 Crescent test specimenNick depth 1.00±0.2㎜
Model SDSC-1200J for JIS K6301　A-shapedNick depth 0.50±0.08㎜
Model SDSC-1200AS for ASTM D624 Die BNick depth 0.50±0.05㎜
Operation Method 1.Set a test specimen in the cavity (photo upside) and close the lid.
2.The operation is completed only by lightly pressing down the cavity part.
Dimensions (Approx.) (W)130×(D)150×(H)220㎜

Ⅰ Comparison of a slit part by the pictures between Conventional jig and New jig

Hardness: JIS-A 62
Tensile strength: 5.49MPa
Elongation: 240%

LEFT：Conventional jig
RIGHT:New jig

Hardness: JIS-A 14
Tensile strength: 4.31MPa
Elongation: 760%

LEFT：Conventional jig
RIGHT:New jig

Ⅱ Comparison by data between Conventional jig and New jig

Table 1Comparison of result in silicone rubber
  Conventional jig (0.5㎜) New jig (0.5㎜) New jig (1.0㎜)
Average value (㎜) of
slitting length		 Shallow 0.442 0.488 0.986
Deep 0.688 0.545 1.055
Average *1 0.565 0.517 1.020
Difference of slitting 0.246 0.057 0.069
CV value (％) of
slitting		 Shallow 21.4 5.5 7.8
Deep 24.3 6.9 10.0
Average *2 12.6 4.9 8.7
CV value (％) of tear strength 2.7 2.1 1.7

*0　Reference Value : Hardness: JIS-A 60, Tensile strength: 7.94MPa, Elongation: 290%】
*1　Average is length calculated by (Shallow + Deep) / 2
*2　Calculated based on average value of each [*1]

Table 2Comparison in various rubbers
Kinds Reference property Slitting length (㎜) *1 CV value (％) of slitting *1
Hardness Tensile strength Elongation Conventional jig
(0.5㎜)		 New jig (0.5㎜) Conventional jig
(0.5㎜)		 New jig (0.5㎜)
A JIS-A 14 4.31MPa 760％ 0.867 0.475 23.3 19.0
B JIS-A 30 4.70MPa 340％ 1.058 0.548 26.6 6.8
C JIS-A 38 7.06MPa 350％ 1.018 0.510 9.2 3.9
D JIS-A 60 7.84MPa 290％ 0.565 0.517 12.6 5.0
E JIS-A 62 5.49MPa 240％ 0.492 0.475 2.9 0.0

*1 Slitting length and CV value of slitting are calculated by average of slitting. (Average of slitting of front and back of test specimen (Shallow + Deep) / 2)

Kinds Reference property Slitting length (㎜) *1 CV value (％) of slitting *1
Hardness Tensile strength Elongation Conventional jig
(0.5㎜)		 New jig (0.5㎜) Conventional jig
(0.5㎜)		 New jig (0.5㎜)
For roll JIS-A 1 0.98MPa 450％ not slit 0.625 not slit 0.0
For roll JIS-A 10 1.27MPa 300％ 0.900 0.592 7.4 6.5
Rubber contact JIS-A 13 4.12MPa 740％ 1.317 0.625 17.6 14.4
Rubber contact JIS-A 14 4.31MPa 760％ 0.867 0.475 23.3 19.0
For die making JIS-A 30 4.70MPa 340％ 1.058 0.548 26.6 6.8
For nipple JIS-A 35 10.78MPa 890％ 0.485 0.586 37.8 7.1
For die making JIS-A 36 11.76MPa 900％ 0.858 0.617 13.1 2.3
Rubber contact JIS-A 38 7.06MPa 350％ 1.018 0.510 9.2 3.9
For insulating
material		 JIS-A 60 7.84MPa 290％ 0.565 0.517 12.6 5.0
For die making JIS-A 62 5.49MPa 240％ 0.492 0.475 2.9 0.0

*1 Slitting length and CV value of slitting are calculated by average of slitting. (Average of slitting of front and back of test specimen (Shallow + Deep) / 2)

  Unevenness of slitting of all products
CV value (％) Manual CV value (％) Machine (0.5㎜) CV value (％) Machine (1.0㎜)
Shallow 53.0 10.4 6.4
Deep 33.0 11.9 8.1
Average 37.3 8.5 6.7

  Average (mm) of slitting of all products
Manual Machine (0.5㎜) Machine (1.0㎜)
Shallow 0.640 0.495 1.002
Deep 0.966 0.575 1.098
Average 0.803 0.535 1.050
Difference of front & back 0.326 0.080 0.096

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