epdm材料:EPDM 65:5 SHD 或者是SHO是什么东西

hunterall

请教一下高人
我现在碰到一个材料是：
( M: g. ~2 ~& Z: w5 g; K& h# r' }EPDM 65:5 SHD 或者是SHO
; L" k1 l% W' L+ N到底是什么东西？？
) x/ K7 g5 D% K* l; J==============
没有人清楚吗？

swrcc

应该是Shore D或Shore O 65±5度罢!
# N  q! j2 u4 W" Y  D; n
The Shore test has been used since 1907 to determine the hardness of a wide variety of rubber and soft plastics. Originally there were only 4 different scales for rubbers. However, now there are 12 scales to allow testing an even wider range of materials from small rubber O rings to very soft foam products. The testers that perform Shore tests have been commonly referred to as Durometers and the results frequently called Durometer hardness. With the exception of the M scale testers, all Durometers can be used either as a portable unit or in an operating stand. This flexibility adds greatly to the usefulness of the Shore scale.
$ W5 T0 d) V% V1 ?, t/ xStandards
2 ^; \+ G* Z  ]: N4 C; I4 y. u/ QShore test methods are defined in the following standards:
+ [# @6 N3 _# S9 D·        ASTM D-2240
- f: u/ Q) B- F% P% J·        DIN 53 505
5 R( ]# Z. J, w·        ISO 7619 Part 1
·        JIS K 6301*
·        ASKER C-SRIS-0101
+ M6 W% N! f8 \! P' q* X; X% K*Note: The JIS standard is very similar to the ASTM 2240 standard. However, there are small but important differences.
9 F5 L" D5 M7 vShore Test Method
0 m! x7 A+ g0 y; ^The Shore test uses a hardened indenter, an accurately calibrated spring, a depth indicator, and a flat presser foot. The indenter is mounted in the middle of the presser foot and extends 2.5mm from the surface of the foot. In the fully extended position the indicator displays zero. When the indenter is depressed flat even with the presser foot's surface, the indicator displays 100. Therefore, every Shore point is equal to 0.0025mm penetration (M scale is 0.00125mm).
In use the unit is placed on the sample so that the presser foot is held firmly against the test surface. The spring pushes the indenter into the sample and the indicator indicates the depth of penetration. The deeper the indentation the softer the material and the lower the indicator reading.
The different Shore scales, A, B, C, D, DO, E, M, O, OO, OOO, OOO-S and R are created by using 7 different indenter shapes, 5 different springs, 2 different indenter extensions an 2 different presser foot specifications. The A and D scales are by far the most commonly used. The M scale uses a very low force spring and was developed to allow testing very small parts like O rings that can not be tested in the normal A scale. Because different materials respond to the test scales in different ways, there is no correlation between the different scales.
- D( M* x. a! U! ~) [Applications
: z9 M1 Z+ ?$ T: oAll Durometers except for the M scale units can be used as a portable device. Test stands are recommended for best accuracy and are required for M scale testing because of its increased sensitivity. Some stands have extra weights to make sure that the force on the presser foot is constant from test to test. Normally multiple tests are done on each sample and the average result is used.
Strengths
1.        Fast, easy to use
2.        Inexpensive
% X& ~, y+ l4 ^# X) b$ ~3.        Wide range of materials can be tested
4 ~. t9 r0 q  ?& W5 t& [4.        Non destructive, part can normally be used after testing
Weaknesses
1.        Dwell time variables can cause poor readings.
' `/ j. h; S4 b/ N: I2.        Inconsistent force on the presser foot will cause errors.
3.        Difficulties keeping the indenter perpendicular to the test surface will cause errors.
8 ]8 [( y8 ?* E" c* T/ _3 V4.        The test surface must be large enough to support the presser foot.

angleNo

鉴别橡胶类型.pdf
橡胶技术网 http://bbs.sto.net.cn/thread-11673-1-1.html

arron_mao

楼上的仁兄搞这么复杂干吗，，SHD不就是shore hardness durometer   肖氏硬度

陈必来

同意上楼 的看法！