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Comparisons of physical properties
  Comparisons of physical properties between LFT and SFT
   (short fiber reinforced thermoplastics)
 
Heat Resistance and Flexural Strength
 
LFT Physical Properties Table
Test Item Unit Test Method PP
ASTM PP-GF10 PP-GF20 PP-GF30 PP-GF40 PP-GF50 PP-GF60
GF Content wt% Ash 10 20 30 40 50 60
Dencity g/㎤ D792 0.96 1.04 1.12 1.22 1.33 1.47
Tensile Strength kgf/㎠ D638 750 1,020 1,290 1,480 1,510 1,570
Elongation % D638 3.2 3.4 3.4 3.3 2.5 2.3
Flexural Strength kgf/㎠ D790 1,100 1,400 1,620 1,860 2,140 2,360
Flexural Modulus kgf/㎠ D790 37,500 55,000 65,700 89,000 114,000 126,000
Impact Strength
23℃
kgf.㎝/㎝ D256 15 20 23 26 30 28
Impact Strength
-30℃
kgf.㎝/㎝ D256 18 24 27 35 39 40
HDT
(18.6kgf/㎠)
D648 160 162 162 163 165 165
RH R-Scale   114 116 116 118 118 118
Shrinking Rate % D955 0.8 0.6 0.4 0.3 0.2 0.2
 
LFT Injection Molding Conditions Table
Molding Condition PP PA(polyamide) PPS TPU PC/ABS POM PET
nylon6 nylon66
Drying
Condition
Temper
-ature(℃)
80 80 80 130 80 90 90 130
Time(hr) 3 4 4 4 4 4 3 4
Molding
Temper-
ature
H1 210-
230
250-
270
260-
270
305-
315
240-
255
240-
270
180-
200
240-
255
H2 215-
235
260-
285
270-
285
310-
330
245-
260
250-
280
190-
210
245-
270
H3 220-
240
260-
290
270-
290
320-
335
250-
260
260-
290
200-
220
250-
280
Nozzle 220-
240
260-
290
270-
295
330-
340
250-
260
260-
290
200-
220
260-
290
Resin 220-
240
260-
290
270-
295
310-
340
250-
260
270-
300
210-
220
260-
290
Tool Temperature(℃) 50-
70
80-
100
80-
100
120-
150
70-
90
70-
110
60-
100
70-
110
Pressure Injection
Pressure
L-M L-M L-M L-M L-M L-M L-M L-M
Back
Pressure
(kgf/㎠)
0-5 0-6 0-6 0-8 0-8 0-10 0-8 0-8
Screw rpm 40-70 40-70 40-70 40-70 40-70 40-70 40-70 40-70
 
LFT - Application
  Automobile Electric appliance &
Industrial Material
Interior Seat Base
Seat Back
Instrument Panel
Kneebolster
Parcelshelf
Roofliner
Door Module Plate
Loadfloor
Sunshade
Sunroof frame
Sunroof Rail
Pedal Box
Roof Rack

Washing Machine Drum Tub
Washing Machine Holder Glass
Washing Machine Belt Pulley
Air Conditioner Fan & Shroud

Pump& Motor Housing
Pipe Fitting
Bobbin
Concrete Mold

Exterior Door armrest Core
Bumper Beam
Silfinishing
Mirror Housing
Mirror Base Plate
Door Handle
 
Engine Room & Etc Battery Tray
Engine Under Cover
Steering Column Shield
Front End Module
Fan & Shroud
Underbody Shield
Spare Wheel Well
Gearbox Shield
 
 
LFT - Application [Automobile]
Interior (22 kgs Potential) Kgs
     Seat Base

2

     Seat Back

5

     Instrument Panel

3

     Kneebolster

1

     Parcelshelf

1

     Roofliner 1.

5

     Doorpanel

4

     Truckliner

2

     Loadfloor

1

     Sunshade

.5

     Sunroof frames

.5

     Pedal box

.5


Exterior (6.5kgs Potential) Kgs
     Bumperbeams

3.5

     Sillfinishers 2
     Mirrirhousion .5
     Doorhandles .5
Under the bonnet (10kgs Potential) Kgs
     Battery Boxes

2

     Engine shields 2
     Steering Column shield 1
     Front end modules 3.5
     Fan shrouds 1.5

Under the bonnet(10kgs Potential) Kgs
     Battery Boxes

2

     Engine shields 2
     Steering Column shield 1
     Front end modules 3.5
     Fan shrouds 1.5

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