PP

Representative PP Grades — KUMHO SUNNY PLASTICS

Modified polypropylene (PP), PP alloy and PP composite compounds from KUMHO SUNNY PLASTICS.

1. Transparent, Chemical Resistant PP — N256

Features

• Light transmittance 70 % at 1.8 mm — transparency in a low-cost, lightweight resin
• High chemical resistance — constant-stress bars show no cracking after 1 week of coating with household cleaners (bleach, Dettol, Mr Muscle, Blue Moon)
• Low cost and low density versus transparent ABS, PC or PVC
• Good heat resistance for a transparent PP

Applications Dirty-water and clean-water tanks, humidifier and dehumidifier reservoirs, dust cups, transparent small-appliance parts, water-contact appliance components.

2. Low-Warpage PP — G204DS

Features

• Warpage performance better than PP+GF — dimensional stability without the surface and warpage penalty of glass fiber
• Low CLTE: 90 × 10⁻⁶ /K (flow direction), 80 × 10⁻⁶ /K (transverse), versus 120 / 100 × 10⁻⁶ for standard PP
• Molded parts pass 96 h storage at 65 °C with acceptable deformation; base-plate injection molding validated warp-free
• Holds flatness on large thin panels through the thermal cycle

Applications Robot vacuum base stations and chassis, air conditioner air ducts, large flat appliance panels, precision-assembly housings where flatness matters.

3. High Weatherability, Paintable PP — G204D

Features

• Paint adhesion without peeling — engineered surface for reliable coating on a normally hard-to-paint resin
• Falling-dart impact ≥ 0.7 m (2 kg × 22 mm)
• Weathering: UVB 300 h, ΔE < 3
• Mold shrinkage adjustable to the tool — simplifies dimensional matching on existing molds

Applications Robotic lawn mower housings, garden and outdoor power equipment, painted outdoor parts, e-mobility components, exterior appliance panels.

4. Low-Warpage PP Alloy (ABS Mold-Compatible)

Features

• Can share a mold with ABS — drop-in substitution without new tooling
• Excellent noise reduction (anti-squeak damping), low warpage and chemical resistance in one grade
• Lower density than ABS for weight and cost reduction
• Retains dimensional stability at elevated service temperature

Applications Air conditioner air ducts and louvers, appliance internal structural parts, ABS-replacement housings targeting weight or cost reduction, low-noise moving parts.

5. Anti-Squeak / Low-Noise PP Alloy

Features

• Molecular-chain damping converts friction and compression vibration into internal energy, unlike rigid benzene-ring HIPS and ABS chains
• Better cost-performance than engineering-resin anti-squeak grades, with low-warpage characteristics
• Whole-unit testing on the anti-squeak platform: noise reduced from 40–45 dB to around 20 dB
• Removes the need for rubber gaskets, felt tape or lubricating grease at contact interfaces

Applications Air conditioner louvers and air ducts, appliance contact parts, robot vacuum moving parts, low-noise assemblies where cost and warpage both matter.

6. Halogen-Free Flame Retardant PP+GF — PP/GF FF Series

Features

• UL94 V-0 at 1.5 mm, glass-fiber reinforced, halogen free
• PFAS-free anti-dripping technology (0 ppm PFAS) replacing PTFE — better processability, surface gloss and cracking resistance than PTFE-based systems
• High rigidity and dimensional stability from glass reinforcement
• Low plate-out; anti-migration versions available for connector applications

Applications Battery pack structural parts, charging pile and charging gun housings, EV components, appliance structural brackets, electrical enclosures for the EU and US markets.

7. Burn-Through Resistant Flame Retardant PP+LFT — F2054G-A

Features

• Withstands 1300 °C flame for 10 min without burn-through (and 600 °C for 10 min) — long-glass-fiber composite engineered to replace metal barrier plates in battery packs
• UL94 V-0 at 1.6 mm
• Typical properties: density 1.26 g/cm³, tensile strength 65 MPa, flexural strength 95 MPa, flexural modulus 5300 MPa, notched Charpy 9.5 kJ/m², unnotched Charpy 28 kJ/m², HDT 150 °C at 1.8 MPa, mold shrinkage 0.3–0.6 %
• Lowest density of the burn-through family (vs PA+GF 1.48, PA/PPO+GF 1.37) — the lightweight option for thermal-runaway protection
• F2058G-A available for higher-performance requirements

Applications EV and energy storage battery pack top covers and barrier plates, thermal-runaway protection panels, battery module firewalls, safety-critical enclosures replacing sheet metal.

About Kumho Sunny Plastics

Kumho Sunny Plastics is a leading specialist in engineering plastics modification and resin alloys in China. With nearly 30 years of expertise, we serve over 1,000 home appliance clients and more than 100 Fortune Global 500 international customers. Our core capabilities span flame-retardant ceramification, high-chroma coloring, noise reduction, phase-morphology control, ultra-weatherability, low-warpage, metal replacement, and chemical resistance. We focus on application-driven property enhancement tailored to specific customer scenarios, delivering performance that far exceeds standard modified plastics.

Contact: ksmarketing@kumhosunny.com