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1、Multi-Nip Calender Covers
[5 R3 f) G8 H" T4 w) Z$ ~Required cover properties/ S. ~% u0 u! |+ ?9 P+ [( e; z
.Superior impact resistance
# H9 @: l" n2 Z6 P.Superior wear resistance
" ~6 S- x, c: V0 b( E2 D- i" G.Good doctorability
2 `. [- |. b- [) N.Superior barring resistance; W& j9 R3 p4 x) U4 |) r8 I
.Homogenious, smooth cover surface for SC/Release/LWC1 _4 _0 h3 U7 x$ B q1 `; ?
.Ultra-fine surface for coated fine paper
+ W4 @4 L% ?! T0 q1 S) n: {0 b.Low heat build-up0 u4 O8 a/ Y, J4 t2 v0 m7 T
2\Calender Cover Demand" R6 Q( n- V. O4 s1 i' i! N
2.1 Application Properties
+ f! S6 U1 p' S+ x- Grinding Interval+ M% H* o' k8 A P( n3 `- u
- Wear Resistance
' q. s ~7 b [ B& }- Damage Tolerance9 L; E: c4 d2 Q2 z; s
- Surface Topography0 y$ K" m; F+ b% H+ D
- Hardness
6 s( r$ H8 v$ q- Self Cleaning Properties% z5 ^ q" f& O: k3 D8 L. \* n
- Doctorability! B, ]- a$ U% W4 `. t& K
- Colour
1 I. p9 i- A: i: q6 V: E2.2 Machine Factors1 T, Z: k+ A/ _! v) ]5 `
- Linier Load" D- |; w. Y" L, r- d, I% ^
- Speed
0 t0 F8 L7 n% W1 r8 @( a- Dimensions
$ W1 \* A2 _4 h+ J( q- Calender Type
& P* s3 z: f' u, l/ K- Roll Type
# S9 g8 H8 n' Z+ t- u4 ]- s! V+ {- Paper Quality
+ T1 H1 ^- d- i" _" L0 D- Temperature
) N# b1 _& J& |. I2 ?2.3 PhysicalProperties
3 }* \' V0 q7 U1 J! Y! F/ i- E′ (t, x, y, z)" K' o1 i, ]' B# K: \
- tan d (t)" b5 k* x- S3 d( K! A
- sB (t)
- Q- G, V- |. x- aT (x, y, z)
: b; c% m1 }7 h4 L, g- Wspez0 R0 y6 j( v4 I/ V
- K1C
- c2 B& M9 G" K- Y$ c9 E- sZ (t)6 j9 h4 z- H: R! E- P/ E
3\ Calender Cover Criteria8 K2 C. q8 I* l5 \; i8 c
3.1 Finishing Results
/ l+ y' y$ N' K. T$ _. l) _7 F -Dynamic deformation behaviour
/ b3 z- ]* l( Y& e* v -Hardness
5 V' s2 E) k8 _) q -Surface Topography
5 B) m' Z) B. h/ \- v4 u -Less dirt accumulation
1 ~8 E% A; @8 @- x6 n' z3.2 Damage Tolerance+ f" \0 z' n& T7 @, Y
Residual Stress+ X z( q) s9 G7 R5 |$ _ n) x
- Fracture Toughness2 Z- l( w0 j8 x m' I
- Impact Behaviour$ q/ c3 ~/ z V* u2 `/ }. l' x
- Dynamic Heat buildup
, o% b+ F: E& F; j$ N- Thermal Expansion Coefficient
& C( w, ?4 r9 \) |9 b7 Y. t3 S3.3 Tribological Properties3 G2 v+ v$ I9 T+ N4 O( Q
- Wear resistance7 C4 U9 S6 M" Q4 N
- Structural Strength
+ m5 W* A, q( s0 U& }- Coefficient of friction |
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