2. ΔL Δa Δb
DATE 23/09/2016 TRIAL # HDP-16-010 MOLD HD PLAQUE
FORM
FOR-TEC-111 Rev.: A
Page 1 of 2
QUALITY SURFACE CHARACTERIZATION REPORT
GLOSS RESULTS (ISO 2813 Standard)
T=90°C - Conventional - WITHOUT 10,3 T=120°C - Roctool - WITH 93
MATERIAL
FAMILY PC GF50 SUPPLIER COVESTRO
TRADE NAME Makrolon® GRADE GF9020
LAB - COLOR DEPHT RESULTS (DIN 5033 Standard)
MEASUREMENTS
PROCESS TECHNOLOGY
COLOR SCALE DELTA
COLOR
DIFFERENCE
L* ( Lightness) a* b* ΔE
Note: L* = 0 yields black and L* = 100 indicates diffuse white. a*: negative values indicate green while positive values indicate red. b*: negative values indicate blue and positive values indicate yellow. ΔE>0,2
usual color tolerance.
PICTURES OF INJECTED SAMPLES
T=90°C - Conventional - WITHOUT T=120°C - Roctool - WITH
-0,05 0,30
T=120°C - Roctool - WITH 28,49 -0,1 -0,77
T=90°C - Conventional - WITHOUT 28,20 -0,15 -0,82
-0,29 -0,05
3D TEXTURATION RESULTS
Roughness parameters Conventional (µm3
) Roctool technology (µm3) Improvement (%)
Volume cavity (µm3
) No reach 21277,3
_
Rate replication from the mold surface (%) _ 85%
TEXTURE RESULTS - Ra (Amplitude roughnes parameter)
Roctool technology 120°C
VDI 18 (Ra=±0.80 µm) VDI 22 (Ra=±1.26 µm) VDI 27 (Ra=±2.20 µm)
CHEMICAL 0,79 1,44 2,39 Ra (µm)
EDM 0,62 0,88 1,41 Ra (µm)
LASER 0,77 0,90 1,14 Ra (µm)
Note: In conventional molding, the measurements of the VDI roughness are not mentionned as the presence of glass fibers on the surface disturb the measurement impacting the Ra value.
COMMENTS
Quality surface characterization:
1) Visible improvements using Roctool technology are observed: weld line and sink marks are removed. Glass fibers and defects are removed from the surface.
2) Significant improvement on the gloss value up to 800% with a perfect surface finish compared to conventional process. No significant impact of Roctool on the color depth.
3) The different textured areas hightlight the positive impact on the replication using Roctool technology. Also, the different roughnesses are well felt when touched. The roughness measurement carried out using
optical rugosimeter confirms the above with repliction rate of up to 85% with Roctool.
C
C
3. FORM
FOR-TEC-111 Rev.: A
Page 2 of 2
QUALITY SURFACE CHARACTERIZATION REPORT
ROUGHNESS MEASUREMENT PRINCIPLE
Optical rugosimeter is a measuring instrument used to measure a surface's profile, in order to quantify its
roughness.
In the context of HD Plastics™, two information are carried out using Alicona equipment according to the
standard ISO 4287:
- Replication rate : volume of the specific texture defined versus the one textured on the mold surface
quavity
- The surface roughness parameters : Arithmetical mean deviation (Ra) which evaluate the roughness
amplitude on a profile and Mean roughness depth (Rz) which measure the maximal amplitude roughness
average of the profile.
MEASUREMENT AREAS
1) The high gloss area framed in blue is the measurement area for the gloss, color and specific
roughness Rz* .
2) The red rectangle define the nano-replication area.
3) The green frame correspond to the multi-textured (VDI) area were the roughness is measured.
*Rz: Maximal amplitude roughness mesured for filled materials
ANNEXES
GLOSS PRINCIPLE
Gloss is an optical property which indicates how well a surface reflects light in a specular direction. It is
one of important parameters that are used to describe the visual appearance of an object. The factors
that affect gloss are the refractive index of the material, the angle of incident light and the surface
topography.
In the context of HD Plastics™, a glossmeter is used to carried out the gloss value with a incident angle
of 60° : spectro-guide 45/0 gloss (BYK). HD Plastics™ is following the ISO 2813 Standard.
The graph shows the gloss scale using glossmeter following 60° angle in the gloss unit. Low Gloss
corresponds to a textured surface, Semi Gloss and High Gloss to high polished surface.
LAB COLOR PRINCIPLE
The Lab color space describes all perceivable colors in the three dimensions L for lightness and a and b
for the color opponents green–red and blue–yellow.
In the context of HD Plastics™, a spectrophotometer is used to carried out the LAB value : spectro-guide
45/0 gloss (BYK). HD Plastics™ is following the DIN 5033 Standard.
The graph shows the LAB color scale. The lightness, L*, represents the darkest black at L* = 0, and the
brightest white at L* = 100. The a* and b* value represent the color channels. a*: negative values indicate
green while positive values indicate red. b*: negative values indicate blue and positive values indicate
yellow
White
L* = 100
Black
L* = 0
4. Sensor 1 Sensor 2 Sensor 1 Sensor 2 Sensor 1 Sensor 2 Sensor 1 Sensor 2 Sensor 1 Sensor 2 Sensor 1 Sensor 2
447 248 919,6 695,4 1391,2 1155 387,2 338,8 875,4 775,6 1339 1172,4
11,40% 12,44%Pressure Drop (%) 44,52% 24,38% 16,98% 12,50%
Sensors
Mold Pressure Avg
Pressure (Bar) 500 1000 1500
CONVENTIONAL TECHNOLOGY (80°C) ROCTOOL TECHNOLOGY (180°C)
1000 1500500
PRESSURE DROP BETWEEN THE TWO PRESSURE SENSORS
180°C -68,2% -45,5% -52,5%
FLOW LENGTH MEASUREMENT AT DIFFERENT IMM PRESSURE IMM PRESSURE DROP AT ISO FLOW LENGTH
180°C 71,5% 73,7% 74,4%
160°C
140°C -22,7% -18,2% -25,0%140°C 35,4% 30,2% 30,0%
160°C -29,1% -31,8% -38,8%49,2% 49,3% 47,3%
Pressure (Bar)
ROCTOOL TECHNOLOGY IMPROVEMENT VERSUS CONVENTIONAL TECHNOLOGY
Flow length improvement IMM Pressure improvement
Flow Length (cm) 15 25 35500 1000 1500
TRADE NAME
PICTURES OF INJECTED SAMPLES
T=80°C - Conventional - WITHOUT (1000 Bar) T=180°C - Roctool - WITH (1000 Bar)
Makrolon® GRADE GF9020
MATERIAL
FAMILY PC-50GF SUPPLIER COVESTRO
DATE 03/02/2016 TRIAL # HDP-16-010 MOLD Spiral 1.5 mm
FOR-TEC-101 Rev.: A
Page 1 of 2
FLOW AND PRESSURE STUDY REPORT
FORM
5. COMMENTS
The HD Plastics™ characterization trials shows a significant flow length and pressure drop improvment. The optimum mold temperature
is 180°C regarding to the trials performed with this material. At high mold temperarure, we obtain a longest flow with an important
reduction of the pressure drop compared to the conventional mold temperature.
Note: All the injection trials and the pressure measurements were carried out according to the protocol defined by RocTool (injection process, 2 heating sides,
cold sprue, mold design).
All pressure data are measured using eDart system (RJG).
GF9020
Flow Length improvement vs Injection Pressure in function of Mold Temperature/Mold Thickness
TRADE NAME Makrolon® GRADE
MATERIAL
FAMILY PC-50GF SUPPLIER COVESTRO
TRIAL # HDP-16-010 MOLD SpiralDATE 03/02/2016
FORM
FOR-TEC-101 Rev.: A
Page 2 of 2
FLOW AND PRESSURE STUDY REPORT
