Quality of Hyundai Kia MS213-24 Polypropylene (PP) Copolymer

The “Hyundai Kia MS213-24 Polypropylene (PP) Copolymer Quality” standard, developed by Hyundai-Kia Motors, the oldest motor vehicle manufacturer in Korea, defines the quality of polypropylene (PP) copolymer . This material is used for injection-molded interior and exterior parts of the vehicle, such as pillar trim, deflection nozzles, door trims, transverse pillar trim, and similar parts as specified in the drawings.

In this specification, the types are classified as follows in the table titled “Type and classification” given in the standard:

• Type A: Melting index 1,5 plus/minus 0,5
• Type B: Melting index 4.0 plus/minus 1.0
• Type C: Melting index 8.0 plus/minus 2.0
• Type D: Melt index 16.0 plus/minus 3.0
• Type E: Melting index 35.0 plus/minus 5.0
• Type G: Melt index at least 7.0
• Type G: Melt index at least 9.0

In terms of general requirements, parts using this material must comply with all requirements of the relevant assembly performance specification. The chemical composition and processing conditions that may affect the quality of the parts should not be changed inappropriately. Before changing the chemical composition of the material, it is necessary to consult with the material and quality departments. The final parts made of this material should be free from defects, uneven gloss, burn marks, warpage, silver lines, cracks, uneven color, flow marks, weld lines, sink marks or other defects.

To determine the detailed requirements, this material is tested using the methods specified in the standard and must comply with the requirements specified in the table titled “Detailed requirements”. The detailed requirements in the table are listed on the following basis:

• Melting index
• Specific gravity
• Pulling Power
• Elongation
• Bending strength
• Flexural modulus
• Izod impact power
• Rockwell hardness
• Heat distortion temperature
• Scratch resistance (Erichsen method)
• Resistance to contamination
• Fourier transform-infrared spectroscopy (FT-IR)
• Thermal gravimetric analyzer (TGA)
• Differential scanning calorimetry (DSC)
• Smell
• Prohibition of harmful substances
• Flammability resistance

In general, tests are performed in the following environment:

• The standard condition of the laboratory is 23 degrees plus/minus 2 degrees temperature and 50 percent relative humidity/minus 5 percent relative humidity.
• Standard condition of the test sample: Tests are performed 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.

It must comply with the following standards in terms of melt index:

• “ISO 1133-1 Plastics - Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR) of thermoplastics Part 1: Standard method”.
• “ASTM D1238-13 Standard test method for melt flow rates of thermoplastics by extrusion plastometer”.

It must comply with the following standards in terms of 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”.

It must comply with the following standard in terms of tensile strength and elongation:

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

In terms of sample type, it must comply with the following standards:

• “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).

It must comply with the following standards in terms of 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).

Izod must comply with the following standards in terms of 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).

It must meet the following standards 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).

It must comply with the following standards in terms of 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”.

It must meet the following standards for scratch resistance:

• “MS210-05 Molded plastic parts - Internal” (the grain types of the sample for scratch evaluation are mainly HL-225 and KM-138 respectively). Any evaluation using real automobile grains takes precedence over those using HL-225 and KM-138.

Resistance to contamination

• “MS210-05 Molded plastic parts - Internal” (for contamination assessment, the grain types of the sample are tested using parts or samples with HL-225 and KM-138 grains respectively. Any assessment using real automobile grains takes precedence over those using HL-225 and KM-138.

It must comply with the following standard for Fourier transform-infrared spectroscopy (FT-IR):

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

In terms of thermal gravimetric analyzer (TGA), it must comply with the following standard:

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

For differential scanning calorimetry (DSC), it must comply with the following standard:

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

In terms of odor, it must meet the following standard:

• MS300-34 “Odor test method for indoor materials” (the sample is prepared by injection molding, the sample size should conform to this standard, the sample thickness is 2,5 mm).

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