fabric printing techniques
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8/6/2019 Fabric Printing Techniques
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Fabric Printing Techniques
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T E X T I L E P R I N T I N G
A P P L I C AT I O N OF C O L O R T O A FA B R I C I N A
DESIGN O R PAT T E R N
O B J E C T I V E S
1. G O O DR E G I S T R AT I O N
2. G O O DC L A R I T Y
3. G O O DD E F I N I T I O N
4. G O O D P E N E T R AT I O N
5. G O O DFASTNESS
6 . L O W P E R C E N TA G ESECONDS
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TYPES O F P R I N T I N G P R O C E S S E S
I. AUTOMA TIC FLAT SCREEN PRI NTI NG
A. APPROXIMATELY 17% OF PRINTED GOODS
B. ' ADVANTAGES
( 1 ) LARGE REPEATS
MULTIPLE STROKES FOR PILE FABRICS
C. DISADVANTAGES
SLOW
N O CONTINUOUS PATTERNS
3
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I1 , ROTARY SCREEN PRINTING
A, APPROXIMATELY & % F PRINTED GOODS
B. A D VA N TA G E S
( 2 ) QUICK CHANGEOVER OF PATTERNS
( 3 ) CONTINUOUS PATTERNS
C. DISADVANTAGES
( 1 ) DESIGN LIMITATIONS
( 2 ) SMALL REPEATS
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111. ENGRAVED ROLLER PRINTING .
A. APPROXIMATELY 26% OF PRINTED GOODS
B. ADVANTAGES
(1.) HIGH DESIGN CAPABILITY
A. FINE DE TA IL
B. MULTIPLE TONES
C. DISADVANTAGES
(1) COPPER CYLINDERS VERY EXPENSIVE
--
( 2 ) NOT ECONOMICAL FOR SHORT RUNS
( 3 ) REQUIRES HIGHLY SKILLED WORKERS
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IV.
--
HEAT TRANSFER PRINTING
A.
B.
APPROXIMATELY 7% OF PRINTED GOODS
ADVANTAGES
( 1 ) HIGH QUALITY PRINTS
(2) - FEWER SECONDS
(3) ECONOMICAL FOR SHORT RUNS
( 4 ) PRACTICALLY POLLUTION FREE
C. DISADVANTAGES
(1) SLOW
( 2 ) PRIMARILY ONLY FOR POLYESTER
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STEPSI N
PRINTINGPROCESS
1 . P R E P A R A T I O NF P R I N T A S T E
2. P R I N T I N GF F A B R I C
3. D R Y I N G
4. F I X AT I O NO F D Y E S T U F F
5. WA S H I N G - O F F
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viscosity -t h i d m s s of t h l u i d )
pr int paste faxmula-
resist- of a f l u i d to f l o w - (ie. t.b
- a m of t h IDst impartant variables in a
- can be cmmlled by choosing from a w i d erange of possible t h k h r x x products, nrsaifif2dby
in tarperature, pH, arrl electrolyte
w i a n s - (oil-in-water, w a t e r - i n - i l )
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of Pr in t P a s t e s
E f f e c t of Eledm3ly-5
Effect of cancentration
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T H I C K F N I N GAGENTS
M U S TH A V E P S E U D O P L A S T I C FLOW B E H A V I O R
Low S H E A R= H I G HV I S C O S I T Y
H I G HS H E A R= L o w V I S C O S I T Y
i
S H E A R A T E
P S E U D O P L A S T I CB E H AV I O R
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T H I C K E N I N GM E D I A
S O L U T I O N S F P O L Y S A C C H A R I D E S- G U MA R A B I C
- G U MT R A G A C A N T H
- L O C U S TB E A NG U M
- G U A RG U M
- S O D I U M A L G I N AT E
E M U L S I O N S
-. 0 L - “ WAT E R
- WAT E R - I N - O I L
O I L I S U S U A L L Y V A R S O L
S Y N T H E T I C( A L L - A Q U E O U S )
- P O L Y A C R Y L I CA C I D
-EMA R E S I N G
E L E C T R O LY T ES E N S I T I V E
F O A M S
- A I RD I S P E R S E D I N W A T E R
11
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capable of fauning a i o n a l f i l m u s e d t o
1 - inpartant in d e t e g astrvpss
“ a l l y s y n t b t i c (lata) ~llpounds
--
1 2
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ca lgm - often used to soften e t e r
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Surfactats - used to -particles,
into the f ihe r,
S i m i l a r in 135e are protective col loids -
increasing paste s tab i l i ty,
Smfactants can be
s-
catianic S+
S
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Hurectants
. m-ials aWed t o p r i n t paste fmtrdat ians to
print paste formulations to prevent e e r evaparatim
the paste - preventing -skin-' a rd paste
i n s t ab i l i ty
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,Increase dhesion of b i d e r systan to substrate
L e , Pi-t printing of fiberglass i s e n h a n o e d
by using aninffi-
--
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Added to p r i n t pastes to " i z e f m t i m of
foan (before foan printing).
often S i J i a X E surfactants have been d
any w h i c h bubble fanmtirm
in t b rint paste a d its no
be u s f a .
effects can
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Catalys ts
speed
A c f i e m i c a l dded t o a fanrailation t o
of a c h m k a l . reaction,
be in!Clu3f?d in pr in t paste f cu r rp lLa t ion far
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A U X I L I A R Y C H E M I C A L S
T H O S EN E C E S S A R Y F O R F I X A T I O N O F D Y E O N T O F I B E R
R E A C T I V E S- A L K A L I
V A T S - R E D U C I N GA G E N T
A C L D S- A C I D
C A T I O N I CA C ~ D
D I S P E R S E- C A R R I E R
DO N O T I N C O R P O R A T E S T R O N G A C I D , B A S E S , O X I D I Z I N G A N D R E D U C I N G
A G E N T S I N P R I N T P A S T E .
A C I DA G E R
L AT E N TR E D U C I N GA G E N T S
( S O D I U M U L F ~ X Y L A T EO R M A L D E H Y D E )
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S C R E E N E N G R A V I N G P R O C E S S
-1. P R E P A R A T I O N O F P O S I T I V E F I L M
A . C O L O R S E P A R A T I O N .
. B. S T E P A N D R E P E AT
C. R E G I S T R A T I O N A N D A C C U R A C Y
2. T R A N S F E R T O S C R E E N
A . L A C Q U E R M E T H O D
5 . G A L V A N O M E T H O D
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L A C Q U E RM E T H O D
P E R F O R AT E D S C R E E N P R E F O R M E D-
A .
B.
C.
E.
F.
G.
H .
1 .
H E A T
D E G R E A S E A N D C L E A N
C O A T W I T H L I G H T- S E N S I T I V E E M U L S
D R Y
F I L M P L A C E DI N C O N T A C T W I T H
E X P O S E T O L I G H T
W A S H
S C R E E N
I N S P E C T
C U R E
J . I N S T A L LE N DR I N G
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F L A T - B E D S C R E E N P R N T ING
M E C H A N I Z AT I O NO F H A N DSCREEN P R O C E S S
-
F A B R I C G L U E D T O B L A N K E T
S C R E E N S R I S E AND F A L L
P R I N T I N G D O N E W H I L E S C R E E NI N D O W NP O S I T I O N
R O D O R BLADE S Q U E E G . E ES Y S T E M
. U P T O F O ' U R S T R O K E S P O S S I B L E
S L O W P R O C E S S
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R O T A R Y S C R E E N P R I N T. I N G
C O N T I N U O U S S C R E E N P R I N T I N GP R O C E S S-
F A B R I C G L U E D T O B L A N K E T
F A B R I C M O V E S U N D E R R O T A T I N GS C R E E N S
R O D O R B L A D E S Q U E E G E E S Y S T E M
F I N E A D J U S T M E N T S E A S I L Y M A D E
S P E E D S U P T O 100 Y D J M I N .
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F I X A T I O N M E T H O D S
1. AT M O S P H E R I CS T E A M
- T R E AT M E N T A T 2 1 2 D E G R E E S F W I T H S AT U R AT E D S T E A M
- U S E DW I T H
D I R E C T D Y E S
V A T D Y E S
N A P H T H O LD Y E S
A C I D D Y E S-
C AT I O N I C D Y E S -
R E A C T I V ED Y E S
- F E S T O O N T E A M E RM O S TC O M M O NE Q U I P M E N T
A C I D A G E RF O R A C I D D Y E S
2 . P R E S S U R E S T E A M
- T R E A T M E N TA T 230 D E G R E E S F U N D E R L O N P g E S S U R E
- U S E D W I T H D I S P E R S E D Y E S
- T U R B O - A U T O C L AV EM O S T C O M M O N E Q U I P M E N T
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3 . H I G HT E M P E R AT U R ES T E A M
- T R E AT M E N T W I T H S P U E R H E A T E DS T E A M A T T E M P E R AT U R E U P T O
4 2 0 D E G R E E S F
- U S E D W I T H
D i S P E R S E D Y E S
P I G M E N T S
- C A N A L S O B E U S E D As A N AT M O S P H E R I CS T E A M E R
4 . D R YH E AT
- T R E AT M E N TW I T H D R YH E ATA T T E M P E R A T U R E SU P T O 4 2 0 D E G R E E S
- U S E D W I T H
D I S P E R S E D Y E S
R E A C T I V ED Y E S
P I G M E N T S
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R E A S O N S FO R S C O U R I N G
R E M O V E T H E T H I C K E N I N G . A G E N T
R E M O V E A U X I L I A R I E S
R E M O V E E X C E S SD Y E S T U F F
I M P R O V E B R I L L I A N C EO F P R I N T
I M P R O V E F A S T N E S S P R O P E R T I - E SO FP R I N T
P R O B L E M -
B A C K S T A I N I N G O FU N D Y E D A R E A S
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P I G M E N TP R I N T I N G
70% O F A L L P R I N T E DF A B R I C SI N U.S. A R E P R I N T E DI T H P I G M E N T S
C O M P O S I T I O N OF P R I N T P A S T E
P I G M E N T
T H I C K E N E R( E M U L S I O NR A L LA Q U E O U S )
. B I N D E R ( A C R Y L I CP O LY M E R )
Low C R O C KB I N D E R
S O F T E N E R
P R O C E S S
1. P R I N T
2. D R Y
3. C A R E
A D VA N TA G E S
- A L LF I B E R SN D F I B E RB L E N D S
- No A F T E R WA S H
D I S A D VA N T A G E S
- P O O RC R O C KF A S T E N E S S
- H A R S HH A R D--
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Typica l P i p t Print E b m u h t i o n
8 nrywtxight
10%
3%
2%
1/108
5-10%
18
1/10%
1/28
2%
77%
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--
DEFECTS I N SCREEN PRINTING
OUT OF REGISTRATION
LINT A N DI I I R E A L I M A R K S
GLUE STREAK
C OLOR SMEAR
COLOR OUT
CREASED FABRIC
P I N H O L E
DAMAGED SCREEN
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F a b r i c i s f i r s t p r in t ed w i t h a r e s i s t i n g a g e n t , t h en dy ed .
P r o d u c e s s i m i l a r e ffec t s t o d i s c h ar g e p r i n t i n g .
Can use whi te or c o l o r e d resists.
Can u s e dyes of much h i g h e r s t a b i l i t y t h a n th o s e u s ed i n d i s c h a rg e
p r i n t i n g and, t h e r e f o r e , much h i g h e r f a s t n e s s c a n be o b t a i n e d .
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D ischa rge p r i n t i ng i s a method where a "dyed" fabric i s p r i n t e d w i t h
d is ch a rg in g a g en t s M c h s e l e c t i v e l y d e s t ro y t h e d ye.
produced.
A w h i t e d i s cha rge i s
An a l t e rna t i ve me thod i s t o p r i n t along wi th d i s c h a rg ing a g e n t s ,
nondischargeab le dye wtrich g iv es a c olore d d isc har ge surrounded bya
"ground"color.
Advantages
1)
2 )
Large areas of g round co lo r pos s ib l e
Delicate c o l o r s a nd I n t r i c a t e p a t t e r n s p o s s i b l e on d ee p ground c o l o r -excellent dep th and c l a r i t y po ss ib l e
Hig he r p roduc t i on c os t s bu t long l a s t i n g , un i q u e s t y l e s)
--
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HEAT TRANSFERPR INTING
Advantages
I.
2.
3.
4.
5.
6.
Easier handling of units
Easier training of operators
Better registration and clarity
Fewer Seconds (2% vs. 10%)
1nventory in paper
Pollution - free
Disadvantages
1. Slow
2 Limited to synthetic fibkrsmainly polyester
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PRESENTUSESOF HEAT TRANSFERPR I NTS
Kni t ted Appare l
Woven App arel
Drapery Fabr ic
Uphols te ryFabric
A u t o m o b i l e I n t e r i o r s
--
Carpet Tiles
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RECENT
Deep
I NNOVATIONS I N HEAT TRANSFERPR1NTlNG
P e n e t r a t i n g
Cationic Dyes for
Dyesfor Pile Fabrics
P ri ting Acrylics -
Processes for Pr in tin g PolyesterlCottonBlends
1 Coating CottonFiber with Polyester Resin.2. Resin Fixing Dyes on Cotton.
Wet Heat Transfer Pr in t ing