Quality of KIA MS211-47 Reinforced PA66 (Polyamide 66)

The standard “KIA MS211-47 Quality of Reinforced PA66 (polyamide 66)” developed by Hyundai-Kia Motors Company, the oldest motor vehicle manufacturer in Korea, defines the quality of PA66 (polyamide 66) compound reinforced with glass fiber or mineral powder. In the table titled “Types and classification” given in the standard, the classification of glass fiber or mineral powder reinforced polyamide 66 compound is made as follows:

• Type A1: 15-20 percent glass fiber (vacuum connector, solenoid valve)
• Type A2-1: 30 percent glass fiber (oil guide fitting, radiator inlet/outlet tank
• Type A2-3: 30 percent glass wool (assembly fluid resistance) (hydro motor mounted nozzle)
• Type A3-1: 45 percent glass wool (gear support)
• Type A3-2: 45 percent glass wool (assembly fluid resistance) (hydro motor mounted nozzle)
• Type A4: 20 percent glass wool (high impact resistance) (fuel filler cap bracket)
• Type A5: 50 percent glass wool (engine mount)
• Type 6: 30 percent (low friction) (multi-box)
• Type A7: 35 percent (insulation improvement) (rear wheel bearing sensor cover)
• Type B1: 40 percent mineral powder (fuel filler cap)
• Type B2: 40 percent mineral powder (high flow) (fuel filler cap)
• Type C2: 40 percent glass wool and mineral powder (speedometer driven gear sleeve)
• Type E: 50 percent glass wool (shock absorber spacer)

The parts marking method must comply with the standard “KIA MS 201-01 Marking of materials for automotive parts”.

In terms of general requirements, parts using this material shall comply with all requirements of the relevant assembly performance specification. The chemical composition and processing conditions that may affect the quality of the parts shall not be changed inappropriately. Before changing the chemical composition of the material, the part performance, durability and similar aspects shall be tested and approval shall be obtained from the material and quality control departments. The final parts made of this material shall be free from defects, uneven gloss, burn marks, warpage, silver line, cracks, uneven color, flow marks, weld lines, collapse marks or other defects.

To determine the detailed requirements, this material is tested using the methods specified in the standard. The results must conform to the requirements specified in the table titled “Detailed requirements”.

In general, the standard condition of the laboratory in the tests is 23 degrees plus/minus 2 degrees temperature and 50 percent plus/minus 5 percent relative humidity. The samples are carried out on the samples immediately after a conditioning period of at least 48 hours in the standard condition specified above at least 24 hours after molding.

The following standards are followed for specific gravity:

• “ISO 1183-1 Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pycnometer method and titration method”.
• “ASTM D792-08 Standard test methods for density and specific gravity (relative density) of plastics by displacement”.

The following standards are followed for tensile strength and elongation:

• “ISO 527-1 Plastics - Determination of tensile properties”.

The following standards are followed for sample type:

• “ISO 3167 Plastics - Multi-purpose test specimens” (specimen type Type A, test speed 50 mm/min).
• “ASTM D638-14 Standard test method for tensile properties of plastics” (specimen type Type 1, test speed: 50 mm/min).

The following standards are followed for flexural strength and modulus:

• “ISO 178 Plastics - Determination of flexural properties” (specimen size 80,0 × 10,0 × 4,0 mm, span length 64 mm, test speed: 2 mm/min).
• “ASTM D 790 Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials” (specimen size 127,0 × 12,7 × 6,4 mm, test speed: 30 mm/min).

The following standards are complied with for Izod impact resistance:

• “ISO 180 Plastics - Determination of Izod impact strength” (sample type Type A, sample size 80 × 10 × 4,0 mm (notched), hammer 2,94 J).
• “ASTM D256-23 Standard test methods for determining the Izod pendulum impact resistance of plastics” (specimen size 63,5 × 12,7 × 6,4 mm (notched), hammer 2,94 J).

The following standards are followed for thermal distortion temperature:

• “ISO 75-1 Plastics - Determination of deflection temperature under load” sample size 80 × 10 × 4,0 mm, flat method, tensile load: 0,45 MPa)”.
• “ASTM D648-06 Standard test method for deflection temperature of plastics under bending load in axial position” specimen size 127 × 12,7 × 6,4 mm, tension load 0,45 MPa”.

The following standards are followed for Rockwell hardness:

• “ISO 2039-2 Plastics - Determination of hardness - Part 2: Rockwell hardness”.
• “ASTM D 785 Standard test method for Rockwell hardness of plastics and electrical insulating materials” (specimens R scale).

Thermal aging resistance: Thermal aging test is performed by following the test items and aging conditions in the table given in the standard. In the case of tensile strength and IZOD impact strength tests, the retention of strength is calculated.

The following standards are followed for creep stress:

• “ASTM D2990-17 Standard test methods for tensile, compressive and flexural creep and creep-rupture of plastics”.
• “JIS K7115 Plastics - Determination of creep behaviour - Part 1: Tensile creep”.

For high-rate impact resistance, the following standard is complied with:

• “ASTM D3763-18 Standard test method for high-speed puncture properties of plastics using load and displacement sensors”.

The following standards are followed for melt index:

• “ISO 1133 Plastics - Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR) of thermoplastics”.
• “ASTM D1238-10 Standard test method for melt flow rates of thermoplastics by extrusion plastometer”.

Humidity aging resistance: Painted fuel filler cap should have no performance problems after 80 hours at 95 degrees and 72 percent relative humidity with almost the same installation conditions. After 2 hours at room temperature, the gap and washing difference between before and after the test are measured.

Mount liquid aging resistance: After aging the tensile sample described in this standard at 125 degrees plus/minus 2 degrees for 1.000 hours under mount liquid conditions, the strength at the moment of fracture is measured.

The following standards are followed for the surface friction coefficient:

• “ISO 8295 Plastics - Films and sheets - Determination of coefficients of friction”.
• “ASTM D1894-24 Standard test method for static and kinetic coefficients of friction of plastic films and sheets”.

The following standards are complied with for oil resistance:

• Tensile strength: The sample is immersed in transmission oil for 130 hours in an oven at 720 degrees. Then, the tensile strength and elongation test method is followed.
• Flexural strength: The test condition is the same as above. Then, the flexural strength and modulus test method is followed.
• Izod impact strength: The test condition is the same as above. Then follow the Izod impact strength test method.

The following standards are followed for melting point:

• “ISO 11357 Plastics - Differential scanning calorimetry (DSC)”.
• “ASTM D3418-21 Standard test method for transition temperatures and enthalpies of fusion and crystallization of polymers by differential scanning calorimetry” (heating and cooling rate 20 degrees/min).

The following standard is followed for the moisture absorption rate:

• “ASTM D570-22 Standard test method for water absorption of plastics”.

For volume resistance the following standard is followed:

• “IEC 60093 Test methods for volume resistivity and surface resistivity of solid electrical insulating materials”.

The following standard is complied with for flammability:

• “KIA MS300-08 Standard test method for flammability resistance for interior materials”.

For Fourier transform-infrared spectroscopy (FT-IR), the following standard is followed:

• “KIA MS200-61 Test standard - Plastic standard analysis”.

The following standard is followed for the thermal gravimetric analyzer (TGA):

• “KIA MS200-61 Test standard - Plastic standard analysis”.

For differential scanning calorimetry (DSC), the following standard is followed:

• “KIA MS200-61 Test standard - Plastic standard analysis”.

Our organization has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. Among the numerous test, measurement, analysis and evaluation studies provided for businesses in various sectors, there are also testing services in accordance with the "KIA MS211-47 Reinforced PA66 (polyamide 66) quality" standard.