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220 clicksPA6+30% GF (Glass Fiber Reinforced Nylon 6, General-purpose Reinforced Material for Home Appliances)
Base material: Polyamide 6 + 30 wt% short-cut alkali-free glass fiber; natural off-white color, available in black or colored modifications.
Flame-retardant PA66 (FR PA66, two main routes: halogen-free and halogen-containing; mainstream for safety components in home appliances)
Base material: Polyamide 66 with flame-retardant additives, typically combined with glass fiber reinforcement (e.g., FR PA66-GF15/25/30), meeting UL94 V0 flammability rating.
Key Differentiation: The two materials serve entirely different roles in home appliance housings. For structural load-bearing enclosures, PA6+30GF is preferred; for electrical insulation housings and safety-critical components, flame-retardant PA66 is the primary choice.
| Performance | PA6 + 30% Glass Fiber (Reinforced) | Flame-Retardant PA66 (FR PA66-GF25 V0, typical) |
|---|---|---|
| Density | 1.33–1.36 g/cm³ | 1.38–1.42 g/cm³ |
| Melting Point | 220 °C | 262 °C |
| Heat Deflection Temperature (1.8 MPa) | 190–210 °C | 220–240 °C |
| Equilibrium Water Absorption | 1.8%–2.4% | 1.3%–1.8% |
| Stiffness & Strength | High; good toughness | Higher; superior creep resistance vs. PA6+30GF |
| Flame Rating | Non-flame-retardant (standard grade); can be compounded | UL94 V0 (at 0.8 mm / 1.6 mm) |
| Surface Finish | Prone to glass-fiber float; low-float-fiber grade required for visible parts | Float-fiber risk present; improved via optimized formulation |
| Relative Cost | Lower | Higher than PA6+30%GF |
3. Application Scenarios and Advantages/Disadvantages of PA6 + 30% GF for Household Appliance Enclosures
Core advantage
High cost-effectiveness, it is the most economical reinforced nylon solution for the structural shells of household appliances;
Sufficient rigidity and impact resistance, suitable for shells that need support and resistance to deformation;
Good processing fluidity, suitable for injection molding of large-area and complex structure shells;
Resistant to engine oil, grease, and cleaning agents, with good environmental tolerance for kitchen appliances.
Weak points
High water absorption rate, size and rigidity fluctuate more under temperature and humidity changes;
The surface of ordinary formula is prone to floating fibers, and the exposed decorative shells must purchase modified brands with low floating fibers;
The base material is non-flame retardant; cannot be directly used for the shells of components with electricity;
The long-term continuous use temperature upper limit is lower than PA66.
Typical applications of household appliance shells
Internal support shell of washing machine, drum support shell
Air conditioner fan support, outdoor unit structural shell (non-electric area)
Bottom support shell of blender, food processor (without strong electricity)
Structural framework of vacuum cleaner, internal load-bearing shell of vacuum cleaner robot
Prohibited direct use: sockets, switches, power modules, heating components surrounding electrified shells (without flame retardant).
4. Application Scenarios and Advantages/Disadvantages of Flame-Retardant PA66 (FR PA66) for Household Appliance Enclosures
The mainstream of the household appliance industry can be divided into two routes:
Halogen-free flame-retardant PA66: Environmentally friendly, low smoke, preferred for high-end white appliances and export appliances;
Brominated flame-retardant PA66: High flame-retardant efficiency and lower cost, used in traditional domestic appliances. Core advantage
UL94 V0 flame retardant, meeting the safety standards for household appliances (IEC/GB 4706), with strict requirements for live components;
Higher heat resistance, less prone to softening and deformation when close to heating elements (oven, heater, coffee machine);
Lower water absorption rate than PA6, better dimensional stability; Strong anti-settling property, less likely to deform under long-term heating;
Excellent CTI leakage current traceability index, reliable insulation and safety.
Weak points
Raw material cost is higher than PA6 by 30%;
The flame retardant system will slightly reduce impact toughness, requiring a toughening formula;
The same as with glass fiber float fibers, the appearance shell needs to be customized and optimized;
More strict drying requirements, more likely to have silver fibers and bubbles.
Typical household appliance shell applications
Heating modules for heaters, toasters, air fryers
Power adapter shells, protection shells for electronic control boards, terminal shell
Electrical control boxes for washing machines, air conditioners
Insulation shells around heating components of blenders, coffee machines.
5. Decisions on Appliance Shell Selection
Select the condition of 【PA6 + 30% GF】
The parts do not carry high voltage electricity and have no fire protection mandatory requirements;
Focus on structural load-bearing and impact resistance, not being in close proximity to heat sources for a long time;
Budget priority, pursuing cost-effectiveness;
Recommendation for optional selection: Exposed appearance shell → Specify low float fiber and thermally stable PA6 + 30GF.
Select the condition of 【Flame Retardant PA66】
Enclosure for electrical components, electrical control shell, close to heating elements;
Product certification requires UL94 V0 flame retardant grade;
Requires higher long-term heat resistance and smaller size deformation;
Recommendation for optional selection: For export appliances, priority should be given to halogen-free flame-retardant reinforced PA66-GF; For white appliances, you can choose the brand with no flaking and no frosting.
6. Key Process Points for Production Implementation
Common Requirements
Full Drying: Moisture content controlled below 0.2%; PA6: 80 - 85℃; Flame-retardant PA66: 85 - 95℃;
Mold temperature 80 - 90℃, enhancing surface smoothness and reducing floating fibers;
Uniform wall thickness, increasing R-radius at corners to reduce stress cracking.
PA6 + 30GF Special Attention
More sensitive to moisture absorption, ensure good moisture-proofing during storage and for semi-finished products; Increase assembly gap in high-humidity environments.
Flame-retardant PA66 Special Attention
Processing temperature should not be too high (≤ 285℃) to prevent decomposition of flame-retardants and flaking of the product;
Avoid prolonged heating during shutdown to prevent material degradation;
Avoid long-term retention of fuel in the screw and barrel to prevent carbon deposition.
7. Model Selection Summary
Do not use ordinary PA6 + 30GF as the flame-retardant component shell. It cannot pass the fire protection test for household appliances;
The visible exterior shell can be made of either material, but neither can be directly purchased with a general reinforcing agent. It is necessary to require the modification factory to formulate a low-fiber formula;
For the shell close to the heat source, priority should be given to flame-retardant PA66. PA6 is prone to creep and deformation under long-term high temperature;
For pure structural internal shells without fire protection requirements, PA6 + 30GF is a more economical solution.
* The application cases shown may not fully match your target products. Please inform us of your specific requirements, and we will assist you in material selection.
