Quality Commitment
Superior Quality, Precise Oversight
Sanhao Rubber always puts quality first, building a rigorous, comprehensive quality management system from incoming material inspection and process control to final product testing.
Let the Equipment Speak, Back It with Data
We believe stable quality cannot rely on experience alone — it requires quantifiable, traceable data. That is why Sanhao has heavily invested in top Japanese, European and American inspection instruments and widely deployed in-line inspection equipment, turning “consistent quality” into a verifiable standard at every process step.
- Source Control: On arrival, raw materials are verified for cross-linking and physical properties with a rheometer and durometer, preventing defective material from entering the line.
- Full Monitoring: Numerous microscopes and temperature sensors on the line intercept dimensional and process anomalies in real time.
- Full Outgoing Inspection: Optical and 3D profile measuring systems perform gap-free dimensional and appearance inspection; only conforming products are shipped.
Certifications
International Quality & Environmental Management Certifications
Certified by the international authority TÜV Rheinland (Germany), demonstrating Sanhao’s dual commitment to quality management and environmental sustainability.
ISO 9001:2015 Quality Management System
First certified in 2008; standardized management processes ensure stable, superior product quality.
ISO 14001:2015 Environmental Management System
First certified in 2020, implementing green manufacturing and sustainable operations.
Comprehensive Certification Scope
The manufacture and sale of rubber, silicone, PU elastomer and thermoplastic elastomer products all meet the highest international standards.
Inspection Equipment
Inspection Equipment｜A Full Range of Precision Instruments, Seven Inspection Capabilities
From micron-level non-contact optical measurement to comprehensive physical, environmental, electrical and appearance inspection, Sanhao’s testing lineup meets the most demanding high-spec needs of medical, electronics and automotive industries.
01
Precision Dimensional & 3D Profile Measurement
Optical & 3D Profile Measurement
Non-contact · up to 0.0001mm
Breaking the limits of contact measurement, it instantly and precisely captures the dimensions, tolerances and 3D profiles of small precision parts and complex geometries, achieving gap-free, high-efficiency dimensional control.
| Instrument |
Resolution |
Use | Qty |
| Optical image measuring system(KEYENCE) |
0.001 mm |
Non-contact dimensional measurement | 1 unit |
| 3D profile measuring system(KEYENCE) |
0.0001 mm |
Non-contact 3D profile |
1 unit |
| 2.5D image measuring system |
0.001 mm |
Non-contact image measurement |
1 unit |
| Surface roughness tester(MITSUTOYO) |
0.01 μm |
Surface roughness |
1 unit |
02
Physical & Mechanical Strength Testing
Physical & Mechanical Properties
Physical & strength testing
From hardness and thickness to tensile and torque, we comprehensively verify the physical performance of rubber/silicone products, ensuring they meet customer specs and strength requirements.
| Instrument |
Resolution |
Use | Qty |
| Tensile testing machine |
— |
Tensile / compression testing |
1 unit |
| Durometer |
1° |
Full hardness-range measurement (ultra-soft to high-rigidity) |
Several |
| Thickness gauge |
0.01 mm |
Thickness measurement |
Several |
| Electronic thickness gauge(MITSUTOYO) |
0.001 mm |
Precision thickness measurement |
1 units |
03
Environmental & Weathering Reliability Testing
Environmental & Reliability Test
Environmental & weathering tests
Simulating harsh environments such as high temperature, high humidity and oil exposure, we verify product durability and long-term reliability under various conditions, providing the most realistic validation data.
| Instrument |
Resolution |
Use | Qty |
| Temperature & humidity chamber |
— |
Temperature/humidity weathering test |
1 unit |
| Constant-temperature oil bath |
— |
Oil-resistance test |
1 unit |
04
Raw-Material Cross-Linking Testing
Raw Material Curing Analysis
Source Control
Precise cross-linking (cure) testing at the raw-material stage captures the compound’s vulcanization characteristics — the first line of defense for stable quality and consistent batches.
| Instrument |
Use | Qty |
| Rheometer |
Raw-material cross-linking test |
1 unit |
05
Electrical & Color Analysis
Electrical & Color Analysis
Dedicated to functional products
For conductive, anti-static and other functional products and those with strict appearance requirements, scientific instruments precisely control resistance and color consistency, eliminating human judgment error.
| Instrument |
Use | Qty |
| LCR meter |
Resistance measurement |
1 unit |
| Resistance meter |
Surface resistance / anti-static |
1 unit |
| Colorimeter |
Color comparison |
1 unit |
06
Appearance & Micro Inspection
Visual & Micro Inspection
Densely deployed on the line
High-definition digital and electronic microscopes are densely deployed on the QC line for high-magnification micro imaging, ensuring every product’s details, flash-free requirements and surface cleanliness are flawless.
| Instrument |
Resolution | Use |
Qty |
| Digital microscope (7-inch) |
1080 FHD | Product appearance inspection |
Several |
| Portable LCD microscope |
1080 FHD | Product appearance inspection |
1 unit |
| Digital/electronic microscope |
1920×1080P | Product appearance inspection (incl. calibration scale) |
Several |
07
AI Automated Appearance Inspection
AI Automated Visual Inspection
AI × CCD · full automated inspection
Combining the latest AI and CCD vision technology for efficient, gap-free automated defect inspection, replacing manual visual checks and greatly improving mass-production yield and speed while minimizing the defect rate.
| Instrument |
Use |
Qty |
| AI/CCD vision full-inspection machine |
Full automated defect inspection |
1 unit |
Inspection Process
From Incoming to Shipment: a Full-Process Quality Net
Even the best equipment needs a rigorous process to deliver value. Sanhao applies inspection instruments at every checkpoint, forming an interlocking line of quality defense.
IQC
Incoming Inspection
On arrival, raw materials are checked for cross-linking with a rheometer and physical properties with a durometer, stopping defective material at the source.
IPQC
In-Process Inspection
Numerous microscopes and temperature sensors are deployed on the line to monitor dimensions and process temperature in real time, intercepting anomalies immediately.
OQC
Full / sampling inspection of finished goods
Optical and 3D profile measuring systems perform full dimensional and appearance inspection; only conforming products are released for shipment.
RELIABILITY
Reliability Verification
Temperature/humidity chambers, oil baths and tensile testing simulate harsh environments to ensure long-term durability and reliability.