SK Chemicals YUPLENE® R370Y is a high-transparency random copolymer PP offering superior fluidity, low haze, and balanced mechanical strength for thin-walled injection molding, food packaging, and medical applications. Contact ZiJun Plastics for quotes, samples, and technical documents.
| Manufacturer | SK chemicals |
|---|---|
| MFR | 18 g/10min |
| Tensile Strength at Yield | 31.38 MPa |
| Elongation at Break | 500 % |
| Flexural Modulus | 1176.79 MPa |
Note: See the product description for additional technical specifications
Manufacturer: SK Chemicals (South Korea)
Category: Random Copolymer PP
Appearance: High-gloss, natural transparent pellets. The particles are uniform, clean, free of impurities and black specks, and feature high clarity. They can be directly used for producing transparent plastic parts or adapted for color-matching and compound modification.
SK Chemicals YUPLENE® R370Y is a mainstream injection-molding grade high-transparency random copolymer PP resin. Backed by SK Chemicals’ mature polymerization technology, it achieves a well-balanced combination of high fluidity, low haze, high rigidity, and excellent aging resistance. Featuring stable melt flowability and high molding accuracy, this grade is tailored for high-volume, thin-walled, precision injection molding. With fundamental compliance for food contact and relevant certifications, it serves as a benchmark raw material in the fields of food packaging, household daily goods, small medical consumables, and transparent home appliance accessories, earning exceptionally high recognition in global downstream processing and foreign trade procurement. ZiJun Plastics provides original factory-certified spot inventory, bulk container orders, and sample services, supported by complete compliance technical documents to meet global B2B procurement and large-scale mass production demands.
| Property | Test Value | Test Unit | Test Standard |
| Melt Flow Rate | 18 | g/10min | ASTM D1238 |
| Rockwell Hardness | 85 | — | ASTM D785 |
| Property | Test Value | Test Unit | Test Standard |
| Tensile Strength, Yield | 31.38 | MPa | ASTM D638 |
| Tensile Strain, Break | 500 | % | ASTM D638 |
| Flexural Modulus | 1176.79 | MPa | ASTM D790 |
| Izod Impact Strength, Notched 23℃ | 6 | J/m | ASTM D256 |
| Property | Test Value | Test Unit | Test Standard |
| Heat Deflection Temperature | 94 | ℃ | ASTM D648 |
| Vicat Softening Point 1.82 MPa | 135 | ℃ | ASTM D1525 |
| Property | Test Value | Test Unit | Test Standard |
| Haze | 10 | % | ASTM D1003 |
| Property | Test Value | Test Unit | Test Standard |
| Accelerated Aging | 360 | hr | ASTM D3012 |
The technical data sheet (TDS) of SK Chemicals YUPLENE® R370Y PP material from SK Chemicals corporation, if there are differences, please refer to the official website of SK Chemicals.
Excellent Transparency and Optical Performance: Designed with a native low-haze profile, achieving a haze of only 10%. Molded parts exhibit high gloss, uniform clarity, and are free from whitening or hazy defects. They meet high-end transparent plastic appearance standards without secondary polishing, making them ideal for aesthetic-driven light industrial products.
High Fluidity and Efficient Processing Attributes: Features a melt flow rate of 18 g/10min with outstanding melt filling performance. It allows for the rapid molding of thin-walled, complex-structured injection parts, effectively shortening cycle times, enhancing mass production efficiency, and reducing equipment energy consumption and defect rates.
Balanced and Stable Rigidity-Toughness: Boasts a tensile yield strength of 31.38 MPa and a flexural modulus of 1,176.79 MPa, paired with an ultra-high elongation at break of 500%. Molded articles offer adequate rigidity, strong resistance to bending and deformation, balancing structural stability with functional toughness.
Superior Heat and Aging Resistance: Features a Vicat softening point of 135℃ and a heat deflection temperature of 94℃, ensuring resistance to softening or distortion under routine daily and mild high-temperature conditions. Having passed the 360-hour standard accelerated aging test, it exhibits long-term resistance to yellowing and aging, delivering an extended service life for finished products.
Stable Dimensional Accuracy: Features mature polymerization technology, minimal batch-to-batch property fluctuations, and uniform molding shrinkage. Finished products have low probabilities of warpage and distortion with controllable dimensional tolerances, making them suitable for standardized mass production of precision transparent injection-molded parts.
Comprehensive Compliance Tailored for Export: The base resin complies with RoHS and REACH environmental regulations as well as food contact safety standards, accommodating multi-regional export orders and compliance audits worldwide.
Powered by its comprehensive advantages of high transparency, high fluidity, balanced rigidity-toughness, aging resistance, and robust compliance, SK Chemicals YUPLENE® R370Y PP is widely applied across multiple core sectors including food packaging, medical consumables, home appliances, daily chemicals, and household goods:
Food Packaging Containers: Microwave-safe lunch boxes, transparent fresh-keeping boxes, food storage containers, drinking cups, bottle caps, and thin-walled food-contact accessories. Leveraging its food-contact compliance attributes and high-transparent appearance, it adapts seamlessly to routine food storage and heating scenarios.
Medical Care Consumables: Disposable transparent medical accessories, sampling tube housings, and small transparent medical device structural parts. With high material purity and stable performance, it satisfies regular medical consumable manufacturing requirements.
Home Appliance and Consumer Electronics Accessories: Small appliance transparent decorative panels, device observation windows, internal lightweight appliance structural parts, and digital product transparent auxiliary plastic components, balancing visual texture with structural stability.
Daily Chemical Packaging Products: Transparent packaging shells for skincare and personal care products, cosmetic decorative caps, and transparent beauty packaging components. Parts exhibit a smooth molded surface, uniform coloration, and premium product texture.
General Household Goods: Transparent storage boxes, household plastic accessories, and small transparent decorative plastic parts, suitable for large-scale mass production of economical transparent injection-molded articles.
Q1: Does SK Chemicals YUPLENE® R370Y PP require drying before processing?
A: This PP base resin has an extremely low water absorption rate, allowing properly sealed and stored dry raw materials to be fed directly into the injection molding machine. However, if the raw material has absorbed moisture, packaging bags are damaged, or materials are exposed to high-humidity environments for extended periods—especially when producing high-transparency, high-gloss products—pre-drying at 70–80℃ for 2–3 hours is recommended to completely remove surface moisture and prevent molding defects such as silver streaks, bubbles, and uneven haze.
Q2: What are the selection differences between R370Y random copolymer PP and general homopolymer PP?
A: R370Y is a random copolymer polypropylene whose core advantages are superior transparency, high fluidity, and enhanced toughness, making it specifically tailored for thin-walled transparent injection-molded products. General homopolymer PP offers slightly better rigidity and heat resistance, but suffers from poor transparency, brittleness, and lower molding fluidity. If the application prioritizes a transparent appearance, complex thin-walled structures, and bending-resistant usage scenarios, R370Y is the preferred choice; if the focus is on high rigidity, high temperature resistance, and non-transparent structural parts, a homopolymer PP grade should be selected.
Q3: Does this grade meet European and American export compliance requirements, and what qualification documents can be provided?
A: SK Chemicals YUPLENE® R370Y PP complies with RoHS and REACH environmental regulations while meeting routine food contact safety standards, making it suitable for export to overseas markets such as Europe, North America, and Southeast Asia. ZiJun Plastics can provide original factory TDS, MSDS, and COA quality inspection reports along with shipments to support customers with customs clearance, factory inspections, and compliance audits.
Q4: What processing techniques is R370Y suited for, and what precautions should be taken during production?
A: This grade is a specialized injection-molding grade PP, best suited for precision injection molding and high-speed thin-walled injection molding processes. It is not recommended for extrusion, blow molding, or spinning. During processing, a barrel temperature range of 180–220℃ is recommended. Capitalizing on its high fluidity, injection pressure can be appropriately reduced to minimize internal stress in the parts. Avoid prolonged high-temperature dwell times to prevent material aging and yellowing, thereby ensuring finished product transparency and dimensional stability.
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