Quality Control System

Quality Inspection System

• The product control follows a two-tier, four-stage quality inspection process.
• First Tier: In-house Quality Inspection (Four Stages)
• Incoming QC → In-Process QC → Final QC → COA
• Second Tier: External Inspection
• Regularly conducted by certified professional inspection organizations like Taiwan Inspection Technology (SGS)
• Industrial Technology Research Institute (ITRI)

International Standard Compliance Testing

• RoHS Specification Compliance Testing: Reference to IEC 62321:2008
• Heavy Metal-Free Testing: EN71-3 or ASTM-F963
• Specific Surface Area (BET): ASTM D3663-2003
• Tensile Testing: ASTM D412 JIS-k6251, JIS-k6252
• Purity Testing: CNS 1625 (Analysis conducted according to CNS1625 method [HCl titration])
• Oil Absorption Measurement: JIS-K5101
• Ignition Loss: JIS-K5101
• pH: JIS-K5101

PVC Masterbatch Quality Inspection System

PVC raw material incoming inspection → PVC in-process quality check → PVC process control

PVC raw material incoming inspection

• PVC powder and other powdered substances:

  • Fish eye test
  • Particle size distribution test
  • Transparency check

• The testing items for liquid substances include:
  • Specific gravity test
  • Volatile content test

PVC in-process quality check

Every 30 minutes, take a 500g sample for testing. 

• The testing items include:
  • Specific gravity
  • Hardness
  • Color difference
  • Gelation degree
  • Sheet extrusion trial

Process Control in PVC Manufacturing

Key Controls:

• Computerized automated measurement - to minimize human error.
• Closed-space pipeline design for conveying - ensuring no powder leakage.
• Process technology to reduce powder occurrence and effectively prevent spillage.
• Employee discipline and upkeep of standards.