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配方师面试技术考核& `2 K! l' @ W
Chemist Interview Evaluation Test
) X% g+ ]9 N/ _( ^" e$ \# `姓名Name: 出生年月 Birth Date: 2 d3 q l! g. i$ b' R1 A1 I) u m
, Z# c* ~4 p1 W& }
现任职位 Position: 联系电话 Phone No.: # }5 [4 y* D4 h" T
5 q+ C) l. g6 @6 i
日期Date: 备注Note;
" z7 i* y7 C8 m1 J0 c6 L1-如果需要,可加附页You may attach additional sheet as necessary
7 e/ t! }. v% \3 ^9 L6 D& v! u2-如果需要,可做必要的假设 Please make necessary assumptions to answer the questions.
! l6 }. t% z( E1.请根据提供的资料,设计一个满足要求的配方Please develop a compound recipe that will meet all the following physical property requirements.9 ^& o& l$ D1 {; m/ u) R
ASTM Specification SAE J200 M4AA717A13B13C12F17
0 _, Q" P$ L$ W; VAdditional Information Natural rubber
, r7 ]3 ?) [- CTest Item Test method Unit Specification ( c) A: [% L7 l/ F, C' [
Hardness ,Shore A ASTM D2240 70±5
, D: W. i$ `. L8 [) O4 ~# OTensile ASTM D412 MPa ≥17
/ x* [7 T) E$ mElongation ASTM D412 % ≥3005 m" j9 B0 D, O! z8 q
Tear Strength,Die C ASTM D624, KN/m /' G7 c, H( u! h% j% q
Heat resistance,70 h at 70℃ ASTM D573 " a+ B% q1 C: a
Change in hardness, MAX points +10
" V5 o& Y8 h- s( jChange in tensile strength, MAX % -25
' I* [' m( L' D E7 f4 R) wChange in ulimate elongation, MAX % -255 y) j2 F0 }0 ^/ m
Compression Set(70℃x22h) ASTM D395 Method B % ≤25" X8 L8 }/ C* | e' h
Resistance to Ozone ASTM D1171
@2 y. \7 e2 K5 X9 sQuality Retention Rating, min, Method B % 85
* S3 u3 i6 u# _9 a( jLow -temperature resistance, ASTM D2137,
! n) J" P7 J$ K# d2 SNonbrittle after 3 min at -40℃ Method A pass0 @+ ]. V6 S& I4 h1 `5 h" ?6 n
5 Z' i: T' T" @+ z, u9 {1 b1 G
Recipe配方:
9 N% P" K1 z3 ~" |Item No. Ingredient PHR
8 D( n. K* H6 ]# u: A. M9 N1 " M6 j1 P& M( U* h( m" w& Q" w/ x( J
2
* @; F, ~' ~! d- X: o6 `3 5 P7 c8 l2 ^2 r* z6 O% O
4 |- L- Q( U ?: j) T) Q6 C
5) h: a& b% E) v* ^4 K
* }. g$ _$ D4 v3 S( W5 |/ U0 Y" `
9 X# u; _0 g2 {2.Please develop a recipe based on the following application requirement.请根据以下顾客要求,设计一个合理的配方。9 t* \" |; b8 {. i$ s
顾客要求:抗静电,丁苯胶,黑色,60度(Low Static, SBR, Black, 60 shore A)
: b/ @2 j f* M+ o. M3 U1 G5 r! ^" T; j3 u- Q- w0 J! U& D
配方Recipe:
4 p& J/ L% V, u+ Z6 x/ A6 DItem No. Ingredient PHR* t" y; B6 m" G, \$ l* z. n+ p. X
1
. \7 {, l" f7 j9 p2 h; F2 ( r( v1 d) B7 }$ A& S' G, b
3
7 y( U5 {# L7 _- a4 ( o% n; }' U, F8 _! @& q5 I
5 ' n& d# q( ?0 t. {
6 2 [. Y7 J7 r# V+ o2 C, }! t
7 : `2 v2 a+ b `$ _- j: G0 Q" L7 p
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3.我们有一个NBR配方和顾客要求如下,请判断该配方是否能够满足顾客要求,如果不能,请修改配方Please tell if the following recipe can meet the customer’s requirements,if not, please modify the recipe to meet the specification requirements.
8 Z4 w) r4 r5 M顾客的要求如下Customer’s requirements is as follows:
' n: L5 A8 C& T) w. s1 \9 Y3 F( ITest Item Test method Unit Specification
+ |( g7 Q4 B5 _ g, x7 _4 mHardness ,Shore A ASTM D2240 70±5 2 \0 c Y0 T2 H5 ~5 x1 ]" C* O2 S2 k
Tensile Strength, ASTM D412 MPa ≥14
8 H. }$ @3 ], f6 \5 ]9 X) ?0 WElongation ASTM D412 % ≥2500 J1 Q: \6 o2 q" ~+ U- p" ?: d
Tear Strength,Die C ASTM D624, KN/m /
/ s( G3 ]$ r) b9 j7 sHeat resistance,70 h at 125℃ ASTM D865
1 B- ~8 C2 {% F9 o& H+ KChange in hardness, MAX points 0~+15
5 I/ |0 x: n1 B7 b j- E) X- iChange in tensile strength, MAX % -25; z y' X* Z7 w- \
Change in elongation, MAX % -50/ g8 G" p- A2 Q( e- n
Compression Set(150℃x22h) ,ASTM D395 Method B % ≤30
& M' F `. P3 z# `7 E0 `7 _0 rFluid resistance,No.IRM903 Oil,150℃,70 HOURS ASTM D471 ! A+ Y& b9 k* {$ E, p: a
Change in hardness, ASTM D2240 Point -10
) A5 U) i X, z+ ?$ y0 }3 DChange in tensile strength, MAX ASTM D412 % -35
/ F# i: D7 q1 n& ~Change in elongation, MAX ASTM D412 % -35
& |# i7 \+ b$ q% k$ k7 E, RVolume change ASTM D471 % -0~25
7 J3 @) K8 e8 ILow temperature TR-10Max ASTM D1329-02 ℃ -20
; b9 p& W4 z l$ N( G' l; JLow temperature -35℃@5hrs.180。 No cracks
0 t' {- o& W5 k9 l" P' U
: `9 L0 x0 n2 M% ]# u' E2 U: O原始配方Original Recipe 改进配方Improved Recipe& U% i6 ?( [. {) z( G
Item No. Ingredients PHR (180.3) Item No. Ingredients PHR (226.88)+ w: X- v3 u/ o1 R8 N5 f
1 230S NBR 100 1/2
& y' P, p7 v$ D6 p! h( O4 F2 4010NA 1 3/4 6 a5 S; l7 z$ b8 A
3 RD 1 5
6 _7 c; D# f {4 Zinc Oxide 5 6
3 t6 n6 U, j$ A5 Stearic Acid 1 7 8 ^( o1 P! R- {! ]$ s
6 Paraffin Wax 1 8 6 \* G* `& J3 ~0 @
7 N330 23 9
- q+ w! P9 [& H' Y. h8 N770 40 10
4 P: W' L/ V6 @/ H9 i/ p% K9 DOP 5 11 u/ q3 r' p, T7 ~" _
10 TMTM 0.3 12
W9 u) {8 `, w( V7 O/ R e11 CBS 1.5 13 * t) L1 Q$ W- ~$ s0 i3 k2 X4 a
12 Sulfur 1.5 14
& u$ f1 W3 i m/ \# K 15
# t% f& A& P; g' m 1 U; g8 J! u/ o: J
4.下面是一个EPDM配方,在硫化后出模时,制品容易撕裂且不易脱模,如何改进?The parts is easy to tear and difficult to be removed after molding, please solve the problems by modifying the recipe provided., d6 R* x: r, l, C
原始配方Original Recipe 改进配方Improved Recipe
2 j6 l: D A/ y6 P8 N* Q/ hItem No. Ingredients PHR (200) Item No. Ingredients PHR (205.3)
$ u7 H2 m7 K$ q7 N9 }' E: d1 EPDM4045 100 1 2 X) \ M3 @+ I! R, ?8 _/ U3 c
2 RD 2 2
6 b$ q9 j8 V" q5 k3 Zinc Oxide 5 3 ' f: I" r+ B: D
4 Stearic Acid 0.5 4 9 G/ b: h: U0 ~6 ^
5 N770 80 5 " N, l, |* T. M% |, k# g& ^" s' x- @
6 2280 5 6 . G' h$ J$ n( f; U% A5 R
7 TAIC 1.5 7
9 ?6 a" w! I% S2 z3 \, i8 DCP 6 8 & S/ Z2 K: u" o9 b
9 5 s3 H& I9 a4 y- n, r# s
10
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$ X; N: R) U3 k, c2 E[ 本帖最后由 YUTONG1814 于 2008-8-6 10:11 编辑 ] |
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