Glass Filled Polyamide(Nylon) PA6 / PA66 GF30 & PP Engineering Plastics Manufacturer

Juhai Plastics is a China plastic manufacturer specializing in Polyamide(Nylon) PA6 and PA66 plastic — including PA66 GF30 glass filled nylon — plus fiber reinforced PP and other engineering plastics. Our plastic pellets and granules are formulated for stable nylon injection molding, backed by 10+ years of R&D, 3 automated compounding lines and 100+ customers across automotive, electronics and industrial sectors.

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Glass fiber reinforced modified nylon PA66 plastic pellets produced by Juhai factory - black granules close-up

Our Modified Engineering Plastic Series

Customizable glass fiber content (10%-50%), flame retardant (UL94 V0/V2), toughened impact grades, and food grade formulations available for all series.

Modified Nylon PA6 Pellets Series

PA6 with 15%-50% glass fiber, flame retardant V0/V2, and toughened cold-resistant grades for structural and industrial applications.

GF 15%-50%,Flame Retardant,High-Impact,Toughened

Modified Nylon PA66 Pellets Series

PA66 with excellent heat resistance (HDT up to 250°C), high mechanical strength for automotive under-hood components.

High Heat,GF 20%-40%,FR V0,Automotive

Modified PP (Polypropylene) Pellets Series

GF 10%-40% Glass/mineral filled PP, impact copolymers, heat stabilized and UV resistant grades for appliances and automotive.

GF 10%-40%,Impact Modified,UV Stable,Mineral Filled

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Why Global Buyers Choose Juhai Plastics

Juhai Plastics is a specialized plastics factory in China focused on modified engineering plastic granules — nylon PA6 material, PA66 material (including GF30 glass filled nylon) and fiber reinforced PP. With our in-house R&D center, advanced twin-screw compounding lines and strict ISO9001 quality management, we deliver consistent, high-performance plastic pellets for demanding glass filled nylon injection molding and industrial applications.

Tailored Formulation: Custom GF content (10%-50%), flame retardant, impact, heat, UV modifications
Cost-Optimized Grades: Economical PA6/PA66/PP grades for high-volume projects without compromising critical properties
Fast Sampling: Custom samples ready in 3-5 working days
Small MOQ: 1,000 kg minimum for standard grades
One-Stop Service: Material selection support, process troubleshooting, logistics coordination

Learn More About Juhai

10+

R&D Engineers

Twin-Screw Lines

100+

Global Clients Served

30+

Standard Formulations

Industries & Applications

Our modified engineering plastics are trusted across multiple high-demand industries where mechanical strength, heat resistance and dimensional stability matter.

Automotive

Engine covers, intake manifolds, door handles, fasteners, under-hood structural components. PA6/PA66 GF30-GF40 grades.

Electronic & Electrical

Connectors, coil bobbins, relay housings, switch components. Flame retardant V0 grades with CTI tracking resistance.

Power Tools

Drill housings, gear boxes, tool handles. High impact PA6/PA66 toughened grades with excellent fatigue resistance.

Industrial Machinery

Gears, bearings, pulleys, brackets, wear plates. Low-friction PA6-GF grades with dimensional stability.

Garden & Power Tools

Lawn mower housings, trimmer bodies, brush cutter components. UV-stabilized and impact modified grades.

Home Appliances

Washing machine tubs, dryer components, heater housings. Heat-ageing resistant PP and PA formulations.

Industrial Automation

Sensor housings, connector bodies, valve components. Dimensional stable PA66 GF30 and impact-toughened PA6 formulations.

Sports & Leisure

Ski bindings, bicycle parts, inline skate frames. High strength-to-weight PA6/PA66 GF grades.

Certifications & Compliance

All materials are manufactured under ISO9001 quality system with full traceability.

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ISO 9001:2015

Quality Management System certified factory

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ROHS

Restriction of hazardous substances compliant

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REACH

EU Registration, Evaluation, Authorization certified

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UL Yellow Card

UL94 V0 flame retardant grades available

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FDA Food Grade

Food contact compliant PA6 & PP formulations

Technical Blog

Modification & Injection Molding Guides

Practical, data-backed articles from our R&D and process engineers — PA/PP modification technology, injection machine setup, grade selection and defect troubleshooting for production floors.

PA (Nylon) Modification Technology

How glass fiber reinforcement, flame retardant, toughening and mineral filling modify Nylon PA6/PA66 — formulations, mechanisms and property trade-offs explained.

4 article

PP (Polypropylene) Modification Technology

Glass and mineral filled PP (Polypropylene), impact copolymers, heat-stabilized and UV-resistant grades — formulations, stiffness/toughness balance and typical applications.

2 article

Injection Processing & Setup

Machine-side know-how: pre-drying, barrel and mold temperatures, injection pressure and speed, holding and cooling parameters for stable production.

2 article

Material Selection

PA6 vs PA66, glass fiber content, PA vs PP — choosing the right grade with real ISO test data and cost-per-performance analysis.

5 article

Defect Troubleshooting

Splay, float fiber, warpage, weld lines and voids — root-cause diagnosis with step-by-step machine parameter and formulation fixes.

2 article

Industry Applications & Cases

Real production cases for automotive, electronics, power tools and appliances — which grade was chosen for which part, and why it passed.

1 article

Standards & Compliance

UL94 V0/V2, ROHS, REACH, FDA food contact and CTI/IEC electrical ratings — what each certification means and which one your drawing should specify.

2 article

Testing & Quality Control

ISO/ASTM test methods explained — tensile, impact, HDT, MFR — plus how to read a TDS datasheet and verify incoming material lot by lot.

3 article

Latest Technical Articles

Material Selection 2026-10-03

MCB Housing Material: Nylon PA6 or Polypropylene PP? How to Choose the Right Injection Molding Resin

Material Rumah MCB: PA6 atau PP? Cara Memilih Resin Injeksi yang TepatJika Anda mencetak rumah minia···

PA (Nylon) Modification Technology 2026-10-03

PA6 GF30 Warpage: 9 Injection Molding Adjustments That Actually Fix It

PA6 GF30 Warpage: 9 Injection Molding Adjustments That Actually Fix ItA flat plaque that comes out o···

Injection Processing & Setup 2026-10-03

PA6 GF30 Floating Fiber: 9 Injection Molding Adjustments That Actually Fix It

Injection Molding Guide · Updated October 3, 2026PA6 GF30 Floating Fiber: 9 Injection Molding Adjust···

PP (Polypropylene) Modification Technology 2026-09-12

PP GF30 Formulation Breakdown — Resin, Glass Fiber, PP-g-MAH Coupling & Additives

Compounding Formulation · September 12, 2026 · Juhai R&D CenterPP GF30 Formulation Breakdown — R···

Industry Applications & Cases 2026-09-12

Modified PA6 in Low-Voltage Electrical Appliances — MCCB & Contactor Housings, Flame Retardant & Electrical Safety

Industry Application · September 12, 2026 · Juhai R&D CenterModified PA6 in Low-Voltage Electric···

Standards & Compliance 2026-09-12

PA6 Automotive Compliance — IATF 16949, IMDS, ELV, Thermal Aging & OEM Specs

Automotive Compliance · September 12, 2026 · Juhai R&D CenterPA6 Automotive Compliance — IATF 16···

Standards & Compliance 2026-09-12

PA6 Standards & Compliance — ISO Test Methods, FDA Food Contact, UL94, RoHS & REACH

Standards & Compliance · September 12, 2026 · Juhai R&D CenterPA6 Standards & Compliance···

PA (Nylon) Modification Technology 2026-09-12

Rincian Formulasi PA6 GF30 — Resin, Serat Kaca, Agen Pengikat, dan Aditif

Compounding Formulation · September 12, 2026 · Juhai R&D CenterPA6 GF30 Formulation Breakdown — ···

Testing & Quality Control 2026-09-12

PA6 GF30 vs PA66 GF30 — Side-by-Side ISO Test Data Comparison

ISO Test Data Comparison · September 3, 2026 · Juhai R&D CenterPA6 GF30 vs PA66 GF30 — Side-by-S···

Material Selection 2026-09-12

PA6 vs PA66 Nylon — The Complete 2026 Material Comparison Guide

Material Comparison Guide · Updated August 15, 2026 · Juhai R&D CenterPA6 vs PA66 Nylon — The Co···

Defect Troubleshooting 2026-06-29

13 Common Defects in Injection Molding GF-Nylon Parts & Solutions

Processing Troubleshooting · Updated June 29, 2026 · Juhai R&D Center13 Common Defects in Inject···

Material Selection 2026-06-18

How to Choose Glass Fiber Content: 15% vs 20% vs 30% vs 35% vs 50% GF in PA6

Selection Guide · Updated July 18, 2026 · Juhai R&D CenterHow to Choose the Right Glass Fiber Co···

Injection Processing & Setup 2026-06-12

Drying Nylon PA6 / PA66 Before Injection: Why 80°C × 4 Hours Matters

Processing Guide · Updated June 10, 2026 · Juhai R&D CenterDrying Nylon PA6 / PA66 Before Inject···

PA6 vs PA66 nylon comparison guide - side by side test bars

Material Selection August 1, 2026 · 14 min read

PA6 vs PA66 Nylon — The Complete 2026 Material Comparison Guide

Side-by-side comparison of Nylon 6 and Nylon 66: tensile, impact, HDT, chemical resistance, moisture absorption, cost and 15 real-world cases of when to choose which.

Graph of PA6 tensile modulus vs glass fiber content 0 to 50 percent

PA Modification July 18, 2026 · 11 min read

How to Choose Glass Fiber Content: 15% vs 20% vs 30% vs 35% vs 50% GF in PA6

Mechanical property curves at each GF loading, warpage trade-offs, surface finish impact, tooling constraints, shrinkage data and stiffness-per-dollar optimization.

Glass fiber nylon injection molded defects: splay marks, warpage, fiber bundles, voids

Defect Troubleshooting June 29, 2026 · 16 min read

13 Common Defects in Injection Molding GF-Nylon Parts & Solutions

Troubleshooting manual for splay, float fiber, warpage, weld-line weakness, voids, burning, jetting and shrinkage — root cause plus parameter and formulation fixes.

Nylon PA6 granules being dried in hopper dryer before injection molding

Injection Processing June 10, 2026 · 7 min read

Drying Nylon PA6 / PA66 Before Injection: Why 80°C × 4 Hours Matters

How 1.8% moisture causes splay, hydrolysis brittleness and voids. Desiccant vs hopper dryers, Karl Fischer testing and drying charts for PA6, PA66 and PP.

What Our International Customers Say

Over 128 verified buyers across 25+ countries rate Juhai Plastics 4.9 out of 5 for quality, consistency and support.

★★★★★

"Consistent quality across 4 consecutive container shipments of PA6 GF30 economy grade. Tensile and impact data matched their datasheet every time. Our injection molding line rejects dropped by 68%. Strongly recommended for European automotive tier suppliers."

Michael R. Purchasing Manager · Automotive Tier 2 · Germany

★★★★★

"Juhai's R&D team helped us customize a PA66 GF25 FR V0 grade for our smart meter housings. We had very specific CTI & glow wire requirements and they hit the spec in two iterations. Sampling within 5 days. Communication in English was excellent."

Suresh K. Technical Director · Smart Meters OEM · India

★★★★☆

"Sourced their toughened PA6 for power tool housings. Notched Izod impact at -20°C was exactly as quoted. Minor delay on first shipment due to port congestion, but their team proactively communicated and partially air-freighted the urgent batch at their cost. Very professional."

David T. Sourcing Lead · Power Tools · USA

Need a Custom Modified Plastic Formulation?

Tell us your application requirements — temperature, impact strength, flame rating, color, preferred glass-fiber content — and our engineers will recommend the optimal grade within 24 hours.

Request Custom Quote Email Sales: vip@nbjuhai.com