| HS Code | 274512 |
| Polymer Name | YUNGSOX PP Homopolymer 1020 |
| Material Type | Polypropylene Homopolymer |
| Form | Pellets |
| Density | 0.900 g/cm³ |
| Melt Flow Rate | 11 g/10 min (230°C/2.16 kg) |
| Tensile Strength At Yield | 35 MPa |
| Elongation At Yield | 10% |
| Flexural Modulus | 1400 MPa |
| Izod Impact Strength Notched 23 C | 3.0 kJ/m² |
| Rockwell Hardness | R95 |
| Heat Deflection Temperature 0 45 Mpa | 100°C |
| Vicat Softening Point | 150°C |
| Melting Temperature | 165°C |
As an accredited YUNGSOX PP Homopolymer 1020 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | YUNGSOX PP Homopolymer 1020 is packaged in 25 kg multi-wall paper bags, palletized and shrink-wrapped for safe handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL: YUNGSOX PP Homopolymer 1020 packed in 25kg bags, palletized and loaded securely for safe transport. |
| Shipping | YUNGSOX PP Homopolymer 1020 is a polypropylene resin in pellet form, classified as non-hazardous for transport. Ship in clean, dry containers or lined bulk bags, protected from moisture and direct heat. Avoid contamination with other resins. Standard handling precautions apply, with no special transport restrictions. |
| Storage | Store YUNGSOX PP Homopolymer 1020 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture contamination and dust buildup. Avoid contact with strong oxidizing agents. Maintain stable room temperature and protect pellets from physical damage during handling. |
| Shelf Life | Shelf life is indefinite when stored in a cool, dry place away from direct sunlight and heat. |
YUNGSOX PP Homopolymer 1020 is processed in rigid packaging closures with wall sections of 1.0 mm to 3.5 mm, where the nominal melt flow rate of 10 g/10 min under 230 °C/2.16 kg measured per ISO 1133-1:2022 creates a narrower fill window than high-flow closure grades but reduces flash formation in high-cavitation tools. For food-contact closure systems, the olefin polymer is assessed under FDA 21 CFR 177.1520(c) and EU Regulation 10/2011, with overall migration tested according to EN 1186-1 and values held below 10 mg/dm²; pharmaceutical closures for mouthwash or syrup dosage systems are further tested under USP <661.1>. Formulation practice uses the homopolymer as a neat matrix, with polypropylene-compatible color masterbatch incorporated at 1–3 wt% and a slip/antiblock masterbatch based on erucamide or oleamide added at 0.5–2.0 wt% to reduce opening torque after 24–72 h of post-mold migration. Nucleating agents are added at 0.05–0.25 wt% only when cycle time reduction below 20 s is required, because higher nucleation density reduces crystal size but can lower notched Izod impact from 2.0–3.0 kJ/m² toward 2.0 kJ/m²; this trade-off typically excludes nucleation from child-resistant overcaps. Production-scale injection molding uses hydraulic or electric machines with screw L/D ratios of 20:1 to 25:1, compression ratios of 2.5:1 to 3.0:1, shut-off nozzles, and hot runner systems with valve-gate sequencing across 16 to 64 cavities. Melt temperature is maintained at 220–250 °C, mold temperature at 15–40 °C, and hold pressure at 40–60 MPa for 0.8–1.5 s per 1.0 mm of wall thickness; insufficient hold pressure produces sink marks at the gate land, while excessive hold pressure increases frozen-in orientation stress and raises cap diameter variance after 24 h shrinkage of 1.2–1.6% per ISO 294-4. Terminal finished products include beverage overcaps, cosmetic lids, flip-top dispensing caps, and tamper-evident pharmaceutical metering caps; closed-loop regrind from rejected closures is reprocessed up to 20 wt% only with melt filtration through 100 µm screen packs to remove degraded skin and carbonized gate residue. This grade is not optimized for ultra-thin wall closures below 0.4 mm or high-speed beverage cap tools requiring melt flow rates above 30 g/10 min.
| Regulatory domain | Standard / Code | Test method | Limit / condition |
|---|---|---|---|
| US food contact | FDA 21 CFR 177.1520(c) | Solvent extraction under 21 CFR conditions | No migration of extractives beyond applicable limits |
| EU food contact | EU Regulation 10/2011, Annex I | EN 1186-1 overall migration | <10 mg/dm² |
| Pharmaceutical closures | USP <661.1> | Physicochemical and extractables battery | Pass / no toxic extractables |
Storage boxes, hangers, and modular drawer systems produced from YUNGSOX PP Homopolymer 1020 rely on the balance between tensile yield stress of 36 MPa measured per ISO 527-2 and flexural modulus of 1,600 MPa measured per ISO 178, permitting stacking loads without the brittle fracture observed in styrene-based resins at equivalent wall stock. The applicable compliance framework for storage articles in the EU includes REACH Annex XVII restrictions on phthalates and heavy metals, as well as EN 71-3 migration limits when the article is classified as a toy or children’s item; kitchen and pantry storage requires repeated-use food-contact status under EU Regulation 10/2011 and FDA 21 CFR 177.1520(c), with sensory and migration testing performed on the finished molded article rather than on raw pellets. Typical formulation addition ratios for opaque housewares incorporate 1–4 wt% of a polypropylene-compatible pigment masterbatch, while antistatic compartment trays intended for electronic component handling are modified with 0.5–1.0 wt% of a glycerol-monostearate-based antistatic concentrate to bring surface resistivity below 1012 Ω/sq when tested per IEC 61340-2-3. Injection molding of stackable storage boxes uses direct edge gates or subgates on multicavity tools, with mold temperature controlled at 20–50 °C, melt temperature at 210–250 °C, and screw back pressure at 0.5–1.5 MPa to stabilize color dispersion. Living hinges on polypropylene boxes and divided compartments require gate placement that orients polymer chains perpendicular to the hinge axis; hinge thickness is maintained at 0.25–0.50 mm with mold temperature not below 30 °C to avoid frozen-in orientation that reduces flexural endurance below 1 million cycles when validated by repeated bending. Terminal molded products include under-bed storage boxes, domestic stackable crates, clothes hangers, drawer organizers, and compartment trays; the operational boundary for this homopolymer is around −20 °C, below which notched Izod impact values under 3.0 kJ/m² make thin snap-fit features susceptible to fracture during transport.
For injection-molded electrical appliance housings such as fan bases, vacuum cleaner hoods, and external covers, the primary production criterion is not elongation at break but the ability to hold rib-to-wall flatness below 0.5 mm over a 300 mm housing dimension after 48 h of uncontrolled warehouse storage. The homopolymer’s flexural modulus of 1,600 MPa and heat deflection temperature of 105 °C under 0.45 MPa load per ISO 75-2/B define the upper service environment for non-current-carrying housing components. Component-level compliance is evaluated under IEC 60695-2-11 glow-wire testing at 550 °C for appliances above 0.5 A and at 750 °C for unattended appliances, with the neat homopolymer classified UL 94 HB; any requirement for V-2 or V-0 cannot be met by the 1020 base alone and would require compounding with an intumescent ammonium polyphosphate system at 25–35 wt%, a formulation step that reduces melt flow and shifts the processing window outside the scope of this grade. IEC 60335-1 household appliance safety and IEC 60065 audio/video equipment requirements may govern the finished appliance, while internal specifications often require glow-wire ignition temperature above 650 °C for plastic parts near potential ignition sources. Formula addition ratios for unpainted appliance sections consist of 2–3 wt% pigment masterbatch, 0.2–0.5 wt% of a phenolic antioxidant package to protect against melt degradation in hot runner systems, and 0.75–1.5 wt% of a non-blooming antistatic additive for dust-sensitive electronic housings. Processing on production-scale injection molding machines uses screw L/D ratios of 20:1 to 25:1, melt temperature of 210–240 °C, mold temperature of 30–60 °C, injection velocity of 60–120 mm/s at the screw, and holding pressure of 50–70 MPa; corner weld lines formed behind bosses are a documented failure initiation point when melt front temperature drops below 200 °C, so sequential valve gating is specified on tools with more than 4 drop locations. Terminal products include vacuum cleaner hoods, electric fan bases, dehumidifier shells, and non-live electrical enclosure covers where reduced mass and chemical resistance to cleaning agents are weighted over high-gloss surface retention.
Dunnage trays, collapsible tote boxes, and light-duty distribution containers molded from YUNGSOX PP Homopolymer 1020 are specified when dimensional repeatability under warehouse temperature swings is more important than sub-zero drop impact. Because the homopolymer exhibits a crystalline melting peak at 160–165 °C per ISO 11357-3 and heat deflection temperature of 105 °C under 0.45 MPa, containers made from it tolerate contact with warm return-air conveyor systems but are not rated for hot-fill packaging or continuous exposure above 90 °C. The regulatory framework for non-food industrial logistics applications is primarily REACH and the RoHS Directive 2011/65/EU Annex II restructured heavy-metal limits, applicable when containers are used to move electronic subassemblies within a manufacturing site; containers exported to Japan for cleanroom logistics are additionally checked against JIS Z 2801 antibacterial surface certification only if an antimicrobial additive package is used. Formulation practice in this segment commonly allows up to 20–30 wt% of clean in-house regrind from the same YUNGSOX 1020 molding stream, with color masterbatch at 0.5–1.5 wt% for dark grey or black logistics colors and a hindered-amine light stabilizer package at 0.2–0.5 wt% when containers are stored outdoors. Injection molding of crates and totes uses thick-walled tools with wall sections of 3.0–4.5 mm, melt temperature of 210–240 °C, mold temperature of 15–40 °C, and holding pressure of 35–55 MPa applied for 15–25 s; insufficient hold time in thick boss areas produces vacuum voids with diameter 0.5–1.5 mm, which are detected by cross-sectioning and are not always visible on the surface. Mold design specifications include draft angles of 1.5–3.0° on side walls, rib-to-wall thickness ratios no greater than 0.6:1, and corner radii above 1.5 mm to avoid notched stress concentration during pallet strapping. Terminal finished product types include collapsible distribution totes, garment storage boxes, postal trays, and returnable dunnage for automotive tier-one parts; the product boundary for this material is defined by notched Izod impact of 2.0–3.0 kJ/m² at 23 °C, which is insufficient for pallet edge drops from 1.5 m at −20 °C without impact-modifier addition or selection of a copolymer grade.
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YUNGSOX PP Homopolymer 1020 is a pelletized isotactic polypropylene homopolymer intended for injection molding. The intended application range includes injection molded caps, closures, thin-wall food packaging, housewares, crates, appliance housings, and general-purpose rigid parts where continuous service temperature does not exceed 90°C. The producer grade code 1020 is internal nomenclature and does not serve as a melt flow rate specification unless the lot-specific certificate of analysis states otherwise. Controlled release parameters commonly include melt mass-flow rate under ISO 1133-1:2022 at 230°C/2.16 kg, tensile yield stress per ISO 527-2:2012, flexural modulus per ISO 178:2019, notched Charpy impact strength per ISO 179-1:2010, density per ISO 1183-1:2019, and mold shrinkage per ISO 294-4:2018. The certificate of analysis is normative for all lot-specific limits.
Relative to random copolymer PP of comparable melt flow class, YUNGSOX PP Homopolymer 1020 shows higher flexural modulus, higher tensile yield stress, higher heat deflection temperature under low load, lower optical clarity, and lower notched impact strength at room temperature. Relative to heterophasic impact copolymer PP, the grade shows lower sub-ambient notched impact strength and is not intended for freezer-grade packaging or automotive exterior impact components. Table 1 summarizes comparative ranges reported in the literature for unfilled material classes.
| Property / test method | PP homopolymer | PP random copolymer | PP impact copolymer |
|---|---|---|---|
| Flexural modulus, ISO 178:2019 | 1200–1600 MPa | 800–1150 MPa | 900–1400 MPa |
| Tensile yield stress, ISO 527-2:2012 | 30–38 MPa | 25–32 MPa | 20–30 MPa |
| Notched Charpy impact at 23°C, ISO 179-1:2010 | 2.0–4.5 kJ/m² | 3.0–10 kJ/m² | 8–30 kJ/m² |
| Notched Charpy impact at -20°C, ISO 179-1:2010 | 1.0–2.0 kJ/m² | 1.5–3.0 kJ/m² | 4.0–10 kJ/m² |
| Deflection temperature under load, 0.45 MPa, ISO 75-2:2013 | 90–105°C | 75–90°C | 80–100°C |
| Mold shrinkage, ISO 294-4:2018 | 1.2–1.6% | 1.0–1.5% | 1.1–1.8% |
Table 2 identifies the analytical methods used for lot release or incoming inspection of unfilled PP homopolymers of the 1020 injection-molding class. Lot-specific values are not shown because they are batch-dependent.
| Parameter | Test method | Reported unit | Condition |
|---|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | g/10 min | 230°C/2.16 kg |
| Tensile yield stress | ISO 527-2:2012 | MPa | 50 mm/min |
| Flexural modulus | ISO 178:2019 | MPa | 2 mm/min |
| Notched Charpy impact at 23°C | ISO 179-1:2010 | kJ/m² | V-notch |
| Density | ISO 1183-1:2019 | g/cm³ | 23°C |
| Mold shrinkage | ISO 294-4:2018 | % | 60×60×2 mm plaque |
| Deflection temperature under load | ISO 75-2:2013 | °C | 0.45 MPa or 1.8 MPa |
YUNGSOX PP Homopolymer 1020 lacks a dispersed ethylene-propylene rubber phase. As a result, the material exhibits a ductile-to-brittle transition at higher temperatures than impact copolymer grades. At -20°C, notched Charpy impact values for unfilled homopolymer PP of this class are consistently below 2.0 kJ/m², whereas heterophasic impact copolymers may remain above 4.0 kJ/m². The grade is therefore excluded from quick-freeze container lids, frozen food pails, and other sub-ambient impact-sensitive packaging. The limitation arises from polymer architecture rather than processing; impact modification would require blending with an elastomer or selecting an impact copolymer grade.
For refrigerated applications above 0°C with wall thickness above 0.6 mm, the grade may satisfy stiffness and stacking-load requirements in closed-container designs. Field experience on multi-cavity tools with 16 to 64 cavities indicates that unbalanced filling becomes limiting when flow length exceeds 250 mm at 0.8 mm wall thickness; published data for this specific configuration is limited.
Melt processing of YUNGSOX PP Homopolymer 1020 on hot-runner systems requires barrel temperatures between 200°C and 250°C. The manifold is typically held at 230°C to 240°C, with nozzle tips 10°C to 15°C below the manifold setpoint to reduce stringing and drool. Injection speed is set from 100 mm/s to 200 mm/s for wall thicknesses of 0.8 mm to 1.5 mm. Vent depths should be maintained at 0.02 mm to 0.03 mm to avoid flash while allowing cavity air to escape.
Plastication units with L/D ratios of 20:1 to 24:1 and compression ratios of 2.5:1 to 3.0:1 are adequate for this homopolymer grade. Clamp force calculations commonly fall between 0.5 ton/cm² and 0.8 ton/cm² of projected area for closure and container tools. The material does not require predrying under normal covered storage because polypropylene is hydrophobic; if condensation is visible, a hot-air dryer at 80°C for 2 h to 3 h is sufficient. Residence time at melt temperature should be kept below 10 min to limit thermo-oxidative degradation.
When a color masterbatch is added to YUNGSOX PP Homopolymer 1020 at 2% by mass, the melt pressure at constant screw speed may shift by 5% to 10% depending on carrier resin and pigment surface treatment. For light-sensitive thin-wall containers, the processing window between short shots and flash can narrow to ±5°C in melt temperature; molders should perform a viscosity-limited process capability study before setting production alarms.
Shrinkage anisotropy in unfilled polypropylene homopolymer is governed by orientation generated during cavity filling and subsequent packing. Under ISO 294-4:2018, mold shrinkage of unfilled homopolymer PP of this class is reported between 1.2% and 1.6% in the flow direction and 1.3% to 1.7% in the transverse direction. Differential shrinkage exceeding 0.2 percentage points between flow and cross-flow directions is a common driver of warpage in thin-wall rectangular containers. To control anisotropy, mold temperature is maintained at 40°C to 60°C, packing time is set until the gate freezes, and gate location is placed to avoid unbalanced orientation.
Gate freeze time for a 0.8 mm wall section in homopolymer PP of this class is typically below 1.0 s; the holding pressure profile should therefore transfer from injection to packing before gate seal. Packing pressure is generally set at 60% to 80% of peak injection pressure for 3 s to 8 s. Insufficient packing produces sink marks and vacuum voids; excessive packing increases frozen-in stress and warpage after demolding.
Surface adhesion of unfilled homopolymer PP requires pretreatment because the non-polar surface has wetting tension below 30 mN/m. Flame, corona, or plasma treatment raises the surface energy to 38 mN/m to 44 mN/m, measured by ASTM D2578-17 or ISO 8296:2003. For printing, lamination, or adhesive bonding, treatment must be applied in-line immediately before the secondary operation because migration of low molecular weight additives can reduce treated surface energy within hours. This limitation is inherent to polyolefin chemistry and is not a defect specific to YUNGSOX PP Homopolymer 1020.
Unstabilized PP homopolymer is susceptible to photo-oxidative chain scission during outdoor weathering. For outdoor applications, a UV stabilization package based on hindered amine light stabilizers is required; carbon black at 2% to 3% loading is commonly used for non-load-bearing parts. Accelerated weathering tests are conducted according to ISO 4892-2:2013 or ASTM D4329-13. Without stabilization, gloss loss and surface embrittlement can occur within months of direct sunlight; the exact lifetime depends on geographic irradiance, part thickness, and pigment package. This grade is not supplied as a UV-stabilized compound unless the lot documentation explicitly states otherwise.
Production-scale handling of YUNGSOX PP Homopolymer 1020 must account for lot-to-lot variation in melt flow rate and additive package. Incoming inspection should include melt flow rate determination by ISO 1133-1:2022 and optionally differential scanning calorimetry to confirm melting peak. For tinted parts, variations in nucleating agents or antistatic additives can shift crystallization temperature by 2°C to 5°C, altering cooling time and mold shrinkage. Manufacturers should compare each lot’s certificate of analysis against internal processing windows before start-up.
Compared with talc-filled or glass-fiber-reinforced PP, YUNGSOX PP Homopolymer 1020 has lower flexural modulus and lower heat deflection temperature but higher elongation at break and lighter part weight. The unfilled grade also produces lower mold abrasion and allows thinner wall sections in filling-limited designs. When part stiffness requirements exceed 1500 MPa flexural modulus, filled PP is normally required; the homopolymer grade should not be selected solely for stiffness.
Where service temperatures remain below approximately 100°C, YUNGSOX PP Homopolymer 1020 retains dimensional stability under low mechanical load. The deflection temperature under load at 0.45 MPa for unfilled homopolymer PP of this class is reported in the range 90°C to 105°C by ISO 75-2:2013. At 1.8 MPa, the same parameter falls commonly to 50°C to 60°C. Continuous exposure to engine components above 90°C is outside the intended use envelope for an unfilled homopolymer; talc-filled PP or polyamide is normally specified in such locations.
Chemical resistance to aqueous acids, alkalis, and polar solvents is governed by the non-polar semicrystalline homopolymer structure. At 23°C, immersion in 10% sodium hydroxide and 10% sulfuric acid for 7 days produces negligible mass change in unfilled PP; however, strong oxidizing acids such as concentrated nitric acid and halogens attack the polymer. Swelling occurs in aliphatic and aromatic hydrocarbons, chlorinated solvents, and hot fats. Food-contact compliance must be verified against FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011, using migration testing according to the EN 1186 series and specific migration limits in the applicable food simulants.
Living hinge designs require orientation of the polymer chain perpendicular to the hinge line and a hinge thickness below 0.5 mm. For unfilled homopolymer PP of the 1020 class, mold temperatures of 40°C to 60°C and packing pressures sufficient to avoid sink marks are used. Field data from laboratory flexural endurance tests on homopolymer PP of similar melt flow class show acceptable hinge life beyond 100,000 cycles, provided the hinge is gated to orient flow across the hinge and the hinge is not notched. Published data for this specific YUNGSOX grade is limited.
For integral caps and closures, torque retention after 24 h to 72 h is affected by stress relaxation and thread geometry more than by short-term tensile properties. The homopolymer grade is less suitable than random copolymer PP for applications requiring high clarity or low-temperature drop impact. In colored or opaque closures, the stiffness and creep resistance of the homopolymer support thread stability at service temperatures up to 40°C to 50°C, provided the design avoids excessive interference and hot-fill thermal shock.
In commodity PP homopolymers, higher melt flow rate is frequently obtained by controlled rheology and is associated with lower notched impact strength. Therefore, a 1020-class grade may exhibit a trade-off between filling pressure and room-temperature impact. If a part requires both high flow length and high impact, an impact copolymer or a lower-MFR homopolymer with higher packing should be considered. This trade-off is quantified in the producer’s technical data; published data for this specific configuration is limited.
In food-contact applications, unfilled PP homopolymer grades are routinely evaluated for overall migration under EU Regulation (EU) No 10/2011 using food simulants A, B, C, D1, D2, and E according to the EN 1186 test methods. The non-polar homopolymer shows low migration in aqueous simulants; fatty simulants such as olive oil or 95% ethanol present the most restrictive case. Specific migration limits for additives used in the grade must be confirmed by the compounder’s formulation disclosure. Under FDA 21 CFR 177.1520, olefin polymers may be used in contact with food subject to end-use temperature and food type limitations in the regulation.
Organoleptic boundaries are more relevant for closures and containers in direct contact with fats, essential oils, or oxygen-sensitive products. Scalping of flavor compounds into the non-polar polymer matrix can occur; the effect is not unique to YUNGSOX PP Homopolymer 1020 but applies to all unfilled polyolefins. For flavored aqueous products, shelf-life testing should include sensory evaluation because published data for this specific grade is limited.
The grade, if unfilled and unpigmented, contains no intentionally added lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above the thresholds in RoHS Directive 2011/65/EU; pigment masterbatches and additives may alter the final article’s regulatory status. Aerospace or medical specifications require separate lot qualification because this product is not marketed as a medical-grade polymer.
