83 油烟机外壳与风轮：高温 + 油烟 + 蒸汽三工况怎么选
一、油烟机件的工况
外壳与面板：
长期接触油烟（含油脂、醛、酚、酸）。
长期蒸汽（炒菜时）。
温度：常态 30-80℃，机内可达 100-120℃。
寿命：≥8 年。
风轮（叶轮）：
高速旋转（1200-1800 rpm）。
长期接触高温油烟。
振动 + 离心力。
高湿 + 高油污。
拆过三年没洗的油烟机的人，都对那层油膜有记忆。有个维修师傅说过一句行话：油烟机坏，一半坏在油上——油裹着灰尘糊住风轮，动平衡就没了，机器嗡嗡响，轴承先坏。
所以油烟机的塑料件选型，第一工况是力学，第二工况就是油。风轮长期泡在温热油雾里，材料既不能吸油溶胀，也不能被油里的大分子渗透脆化。
他们的风轮方案最后落在耐油增强体系上，外壳走阻燃耐候路线，一套机器两种性格。维修师傅的说法：机器洗不干净是用户的事，材料扛不扛得住油，是选料人的事。
二、外壳方案
① ASA + 阻燃 + UV
外观件主流方案，耐候 + 阻燃 + 不发黄。价格中等。
② PMMA + 阻燃
透明面板可选，高光泽。
③ PA66-GF + 阻燃 + 耐油改性
承力件或要求可焊件用。比 ASA 略贵。
三、风轮方案
① PA66-GF30 + 阻燃 + 耐油改性
主流方案。满足 1500 rpm 工况的强度与耐油。
② PA66-GF35 + 增韧 + 阻燃
高速风轮（>1500 rpm）用，抗振性能更好。
③ PPA-GF30 + 阻燃
超长寿命或商用油烟机（高转速 + 长期高温）用。
四、关键性能对照
| 指标 | ASA-GF | PA66-GF30 | PPA-GF30 |
|---|
| 耐油烟 | 好 | 中偏好（需耐油改性） | 极好 |
| 耐蒸汽 | 中 | 中偏好 | 极好 |
| 阻燃 | 加阻燃可达 | 加阻燃可达 | 天然阻燃 |
| 抗振（风轮） | 差 | 好 | 极好 |
| 长期外观 | 极好 | 中 | 中 |
| 单价 | 1.5× | 1.4× | 3.0× |
五、四个常见坑
① ASA 不耐油
ASA 耐候好，但长期接触油脂会缓慢化学降解。油烟直接打到 ASA 表面 2-3 年出现细裂。
② 玻纤 PA66 油烟环境未做耐油改性
玻纤 PA66 在长期油烟中玻纤表面被油烟浸透，粘接界面变弱。要用"耐油 + 表面封闭"的双重改性。
③ 阻燃剂迁移到表面
高温 + 油烟环境，红磷、溴系阻燃剂容易迁移到表面，表面发白、刺激人体。要选低迁移阻燃体系。
④ 风轮动平衡未做
高速风轮必须测动平衡（G2.5 等级以上），动平衡不到位的风轮振动放大噪声甚至断裂。
六、边界声明
| 工况 | 建议 |
|---|
| 普通家用油烟机外壳 | ASA + 阻燃 |
| 普通风轮 | PA66-GF30 + 阻燃 + 耐油 |
| 高速风轮 / 商用 | PPA-GF30 + 阻燃 |
| 透明面板 | PMMA + 阻燃 |
| 价格敏感低端 | ABS + 阻燃（性能一般） |
一个风轮失衡的三个月
起点是新机型风叶用普通 PA6-GF30，性能测试全部通过。
潜伏期两个月，实验室里的油雾老化测试在跑，整机已上市。爆发在入冬：北方用户开小火慢炖多，油雾温度高凝结快，部分机器噪音值爬升，用户描述为像里面有东西。
拆机发现风轮积油不均，普通料表面能高，挂油严重，动平衡被破坏。
结算动作：风叶表面做低表面能改性、筋条优化导油路径、把油雾老化后的动平衡保持率写进验收。改版机型噪音投诉归零。
油烟机件的会议，三个追问。
追问一：油雾温度与凝结量估算过吗？ 中式爆炒工况按最严算。
追问二：阻燃等级与风道位置匹配吗？ 电机舱内件阻燃是硬要求。
追问三：拆洗方式支持吗？ 用户会水洗甚至浸泡，耐清洗剂要验证。
延伸：常见问题与排查
油烟机的常见问题集中在四类：
问题一：外壳开裂
ASA 不耐油脂，长期直接接触油烟 2-3 年开裂。第一步：外壳与油烟接触位置改 PA66-GF30 + 表面封闭涂层；第二步：定期清理保持外表面。
问题二：风轮振动噪声
高速风轮动平衡不到位 + 玻纤取向不均 → 噪声超标。第一步：测动平衡（G2.5 等级以上）；第二步：换 PA66-GF35 + 增韧（噪声降低 5-8 dB）。
问题三：阻燃剂迁移
高温 + 油烟环境，红磷、溴系阻燃剂迁移到表面，表面发白、刺激人体。第一步：阻燃体系换磷氮系（低迁移）；第二步：表面封闭喷涂。
问题四：风轮油污难清
玻璃化温度选低，油烟渗入玻纤界面难以清洗。第一步：换低 GF 含量（GF25 替代 GF30）；第二步：用自润滑涂层。
这四条之外还有"高温测试"——风轮 150℃ + 油烟 + 1000 rpm 持续运行 1000 小时 验证其长期表现。
实战：三个工程测试
测试一：150℃ + 油烟 1000 小时持续运行。模拟油烟机实际工况，PA66-GF + 耐油改性 性能保留率 ≥85%。未做耐油改性的：500 小时后玻纤裸露。
测试二：1000 rpm 持续高转速动平衡。G2.5 等级以上，PA66-GF35 + 增韧 通过率高。PA66-GF30 普通配方 噪声大、振动明显。
测试三：阻燃剂迁移测试。100℃ × 100 小时，红磷 / 溴系阻燃剂会迁移到表面；磷氮系阻燃剂迁移量显著低。
关键提示
油烟机风轮量产前必做150℃ + 油烟 + 1000 rpm 长期测试。PA66-GF + 阻燃 + 耐油改性 是稳的配方，缺一项 2-3 年出现表面开裂、阻燃剂迁移等问题。
工程备忘
油烟机风轮"耐油脂 + 耐高温 + 阻燃"三项不能省。没做耐油改性的 PA-GF → 500 小时玻纤裸露。阻燃剂没选低迁移体系 → 高温油烟环境表面析出。
行业感
油烟机风轮的"油脂 + 高温 + 阻燃"三件套是行业最大痛点。没做耐油改性的 PA-GF 在油烟机 500 小时玻纤裸露。
收尾补一张三问三答。
| 高频问题 | 一句话回答 |
|---|
| 风轮首选什么？ | 耐油增强 PA66 或 PPS 级方案，按成本 |
| 外壳要求什么？ | 阻燃加耐候加耐清洗，三合一 |
| 挂油怎么破？ | 低表面能改性加导油结构 |
| 油火风险？ | 阻燃等级与电机舱规范对齐 |
补一个用户的真实使用场景： 很多人清洁油烟机用强碱除油剂直接喷，塑料件接触的是 PH 值两位数的环境，比实验室的清洗剂狠得多。耐化学验证建议按强碱除油剂的稀释档做，有厂子按温和中性清洗剂做的验证，在售后清洗场景里照样翻车。用户的厨房不是实验室，验证的浓度要往用户那头偏，材料才立得住。
深一层：油烟机件的现场知识
油烟机的工况在厨房电器里独一档：高湿、高温、油烟、强碱清洗四件套叠加，还有燃气灶的热辐射从下面烘着。这个工况组合里，最狠的不是单项，是频率——一日三餐，油烟机一天工作两三次，件的负荷循环密度比烤箱高出量级。
选型时按"天"算负荷的项目，和按"次"算负荷的项目，材料答案常常不同。油烟机件要按天算，还要按年算总账。
风轮的积油问题再往深说一层：油不是均匀附着的，它在叶片根部与筋条背面富集，这些位置的挂油量能到叶片表面的几倍。低表面能改性解决的是"少挂"，导油结构解决的是"挂了能走"，两个手段配合使用效果最好。
有客户的改版方案在筋条背面开了导流槽，配合低表面能料，积油量降了六成，噪音投诉同步下降。结构与材料配合，永远比单打独斗强。
油烟对塑料的化学作用主要是增塑与溶胀：油烟里的成分会让部分塑料表面溶胀发粘，发粘的表面更容易挂灰挂油，形成恶性循环。耐油评估要看两行数据：溶胀率与表面硬度变化。
有客户的原方案表面硬度下降明显，改用耐油体系后，清洗周期从一个月延长到三个月，用户的实际体验差异比任何实验室指标都直观。
外壳件的阻燃与耐候是双重要求，但油烟机的外壳大多装在室内，紫外负担轻，阻燃负担重。灶台正上方的位置还有热辐射，局部温度比环境高不少，外壳料的长期耐温要按热辐射叠加后的实际温度算，不能按环境温度算。
有项目按常温选了低成本外壳料，夏天厨房高温时段外壳发软变形，返工的教训让他们的工况表多了一栏灶台热辐射。
拆洗是这个品类绕不开的用户行为：现代油烟机很多支持拆洗甚至自带清洗功能，塑料件会周期性接触清洗液与热水。自清洗功能的机型，清洗是高温蒸汽循环，件的工作温度范围比不清洗的机型更宽。选型前先问清洗方式，是这个品类立项的第一个问题。
有客户的免拆洗机型与可拆洗机型用了不同档位的材料方案，两套方案都跑得很稳。
开关与接键的塑料件还有油污渗透的问题：油雾会沿着按键缝隙渗入，粘在内部的弹片与触点上，引发接触不良。这些小件的材料要求与外观无关，与尺寸稳定和耐油相关，用低吸水耐油体系，配合防尘筋设计。
小件的材料预算不高，但坏了的投诉体验极差，很多用户因为按键失灵整机换新，这笔账值得算给决策层听。
安装位置带来的差异也值得记录：中式厨房的油烟机普遍装得低，火苗燎到边缘的案例不是传说，进风罩下缘的耐温要按短时明火接触评估。有厂子在进风罩下缘加了金属包边，成本几块钱，把一个极端场景的召回风险压没了。
极端场景的处理原则是结构与包边解决，不靠材料硬扛，这是安全设计的通用思路。
收尾说一个数据：油烟机的平均换机周期在十年上下，塑料件的材料寿命要按十五年设计，因为拆洗后的残留件还要继续服役。十五年寿命的耐油耐热验证，用加速测试折算，行业里常用的方案是热油浸泡加循环热风的组合。
这套验证跑一次的成本不低，但摊到十五年的售后预算里，是整条产品线最便宜的一笔钱。
油烟机还有一个比较隐蔽的电气关联件值得提醒：电容与接线端子的固定座。这个位置离电机近、温度偏高，油雾也会渗入，材料要求是阻燃加耐油加尺寸稳定三合一。
它的单价在整个机器里排不进前十，但它坏的表现是机器启动异常，用户的维修判断会直接指向整机质量。我们给几个客户的建议都是同一句话：小件按大件的标准选，因为用户的抱怨从不看零件清单。
固定座这种位置，材料预算单上的排名可以靠后，标准名单上的排名不能靠后。
结语
油烟机的核心痛点是"耐油脂 + 耐热 + 阻燃"三项同时存在。外选 ASA 解决外观，风轮选 PA66-GF30 + 阻燃 + 耐油改性是主流方向。
十几年，只做一件事：把尼龙改成能用的样子。
家电厨房件长期料号选择，可以一起聊。
83 Range Hood Housing and Fan Wheel: How to Choose for High Temperature, Oil Fume, and Steam Conditions
1. Operating Conditions of the Range Hood Components
Shell and panel:
Long-term exposure to cooking fumes (including fats, aldehydes, phenols, acids).
Long-term steam (when cooking).
Temperature: Normal range 30-80℃, can reach 100-120℃ inside the machine.
Lifespan: ≥8 years.
Fan wheel (impeller):
High-speed rotation (1200-1800 rpm).
Long-term exposure to high-temperature cooking oil fumes.
Vibration Centrifugal force.
High humidity, high oil contamination.
People who have taken apart a range hood that hasn't been cleaned for three years all remember that layer of grease. A repair technician once said a piece of jargon: When a range hood breaks, half of it is because of grease—the grease, mixed with dust, coats the fan blades, upsetting the balance, causing the machine to hum, and the bearings fail first.
So for the selection of plastic parts of the range hood, the first consideration is mechanical conditions, and the second is oil. The fan wheel is immersed in warm oil mist for a long time, so the material must neither absorb oil and swell nor be penetrated and embrittled by large molecules in the oil.
Their wind wheel plan ultimately settled on an oil-resistant reinforced system, with the casing following a flame-retardant and weather-resistant approach — one machine, two personalities. According to the maintenance technicians: whether the machine gets cleaned or not is the user's responsibility, and whether the material can withstand oil is the material selector's responsibility.
2. Shell Design
① ASA Flame Retardant UV
Mainstream solutions for exterior parts, weather-resistant, flame-retardant, and non-yellowing. Moderate price.
② PMMA flame retardant
Transparent panel optional, high gloss.
③ PA66-GF Flame Retardant Oil-Resistant Modified
For load-bearing parts or parts that require welding. Slightly more expensive than ASA.
3. Wind Turbine Plan
① PA66-GF30 Flame Retardant Oil-Resistant Modified
Mainstream solution. Meets the strength and oil resistance requirements for 1500 rpm operating conditions.
② PA66-GF35 Toughened Flame Retardant
For high-speed wind turbines (>1500 rpm), the vibration resistance is better.
③ PPA-GF30 Flame Retardant
For ultra-long life or commercial range hoods (high speed, long-term high temperature).
4. Key Performance Comparison
| Indicator | ASA-GF | PA66-GF30 | PPA-GF30 |
|---|
| Oil-resistant | Good | Medium preference (requires oil-resistant modification) | Excellent |
| Steam-resistant | middle | medium preference | Excellent |
| Flame retardant | Can add flame retardant | Can add flame retardant | Natural flame retardant |
| Vibration Resistance (Wind Turbine Rotor) | poor | Good | Excellent |
| Long-term appearance | Excellent | middle | middle |
| Unit price | 1.5× | 1.4× | 3.0× |
5. Four Common Pitfalls
① ASA oil-resistant
ASA has good weather resistance, but prolonged exposure to grease can cause slow chemical degradation. If cooking fumes directly hit the ASA surface, fine cracks appear in 2-3 years.
② Glass fiber PA66 has not been oil-resistant modified for oily fume environments
In glass fiber PA66, the surface of the glass fiber is soaked by cooking oil fumes over time, weakening the bonding interface. It is necessary to use a dual modification with 'oil resistance and surface sealing'.
③ Migration of flame retardant to the surface
In high-temperature oily fume environments, red phosphorus and brominated flame retardants easily migrate to the surface, causing surface whitening and irritating the human body. A low-migration flame retardant system should be selected.
④ The wind wheel dynamic balancing has not been done
High-speed rotors must undergo dynamic balancing (G2.5 grade or above). If the dynamic balance of the rotor is inadequate, vibration can amplify noise or even cause breakage.
6. Boundary Statement
| Operating condition | Suggestion |
|---|
| Ordinary household range hood casing | ASA Flame Retardant |
| Ordinary wind wheel | PA66-GF30 Flame Retardant Oil Resistant |
| High-speed fan wheel / Commercial | PPA-GF30 Flame Retardant |
| transparent panel | PMMA flame retardant |
| price-sensitive low-end | ABS flame-retardant (performance is average) |
Three months of an unbalanced wind turbine
The starting point is that the new model's fan blades use ordinary PA6-GF30, and all performance tests have passed.
The incubation period was two months, and the oil mist aging test in the laboratory was ongoing, with the complete machine already on the market. The outbreak occurred at the beginning of winter: Northern users simmered on low heat more often, the oil mist temperature was high and condensed quickly, some machines' noise levels increased, and users described it as if there was something inside.
Disassembling revealed uneven oil accumulation on the fan wheel, the surface of ordinary material was high, oil buildup was severe, and the dynamic balance was disrupted.
Settlement actions: Modify the blade surface to have low surface energy, optimize the rib to guide the oil path, and record the retention rate of dynamic balance after oil mist aging in the acceptance. The revised model has zero noise complaints.
Meeting on the range hood parts, three follow-up questions.
Follow-up Question 1: Has the oil mist temperature and condensation amount been estimated? The Chinese-style stir-fry condition is calculated according to the strictest standard.
Follow-up Question 2: Does the flame-retardant rating match the duct position? Flame retardancy for parts inside the engine compartment is a strict requirement.
Follow-up Question 3: Does it support disassembly and washing? Users may wash it with water or even soak it, so resistance to cleaning agents needs to be verified.
Extension: Common Problems and Troubleshooting
Common problems with range hoods are concentrated in four categories:
Question 1: Cracking of the casing
ASA is not resistant to oil and grease, and will crack after 2-3 years of direct contact with cooking fumes. Step one: change the parts of the shell that contact cooking fumes to PA66-GF30 with a surface sealing coating; step two: regularly clean to maintain the exterior surface.
Question 2: Wind Turbine Vibration Noise
High-speed fan wheel dynamic balance is not in place, fiberglass orientation is uneven → noise exceeds the standard. Step one: measure dynamic balance (G2.5 level or above); step two: replace with PA66-GF35 for toughening (noise reduced by 5-8 dB).
Question 3: Flame Retardant Migration
High temperature + oil fume environment: red phosphorus and bromine-based flame retardants migrate to the surface, causing whitening and irritating the human body. Step 1: Replace the flame-retardant system with phosphorus-nitrogen system (low migration); Step 2: Surface sealing spraying.
Issue 4: Hard to clean oil stains from the fan wheel
Choose lower glass temperature for oil fumes to penetrate the fiberglass interface and be difficult to clean. Step 1: Switch to lower GF content (GF25 replaces GF30); Step 2: Use a self-lubricating coating.
Besides these four points, there is also a "high-temperature test"—fan turbine 150°C + oil fume + 1000 rpm continuous operation for 1000 hours to verify long-term performance.
Practical: Three engineering tests
Test One: 150°C + oil fume continuous operation for 1000 hours. Simulated range hood actual operating conditions: PA66-GF + oil resistance modification performance retention rate ≥85%. No oil resistance modification: glass fiber exposed after 500 hours.
Test 2: 1000 rpm sustained high speed dynamic balance. G2.5 grade and above, PA66-GF35+ toughening has a high pass rate. PA66-GF30 standard formula is noisy and vibration is obvious.
Test 3: Flame retardant migration test. At 100°C × 100 hours, red phosphorus/bromine flame retardants migrate to the surface; Phosphorus-nitrogen flame retardants migrate significantly.
Key Tips
Range hood fan turbines must undergo long-term testing at 150°C + fume + 1000 rpm before mass production. PA66-GF + flame retardant + oil-resistant modification is a stable formula; missing one will cause surface cracking and flame retardant migration issues within 2-3 years.
Engineering Memo
Range hood fan "grease resistance + high temperature resistance + flame retardancy" cannot be omitted. Without oil-resistant modification, PA-GF → exposed glass fiber after 500 hours. Flame retardant not selected for low-migration system → surface precipitation in high-temperature oil fume environments.
Industry Sensibility
The "grease + high temperature + flame retardant" three-piece set of range hood fan turbines is the biggest pain point in the industry. PA-GF without oil-resistant modification exposes glass fibers in range hoods for 500 hours.
Closing with a three-question and three-answer post.
| High-frequency questions | One-sentence answer |
|---|
| What is the first choice for a fan turbine? | Oil-resistant enhanced PA66 or PPS grade solution, according to cost |
| What do you require for the enclosure? | Flame retardancy, weather-resistant, and cleanable all-in-one . |
| How to break oil dripping? | Low surface energy modified oil-conductive structure |
| Oil and fire risk? | Flame retardant level aligned with motor compartment specifications |
Adding a real user scenario: Many people spray strong alkali degreaser directly when cleaning range hoods, and plastic parts are exposed to environments with double-digit pH values, which is much harsher than laboratory cleaning agents. Chemical resistance testing is recommended to be done at the dilution level of strong alkali degreaser. Some factories use mild, neutral detergents, but after-sales cleaning still fails. The user's kitchen is not a laboratory; the verification concentration must be biased toward the user for the material to stand.
Deeper Layer: On-site knowledge of range hood components
Range hood operating conditions are unique among kitchen appliances: high humidity, high temperature, oil fumes, strong alkali cleaning combined with the heat radiation from the gas stove below. In this combination of working conditions, the toughest part isn't individual items, but frequency—three meals a day, the range hood operates two or three times a day, and the load cycle density of the components is far higher than that of an oven.
When selecting models, the load is calculated by "days" and those calculated by "times"—the material answers often differ. Range hood components must be calculated by the day and by the year.
Delving deeper into the oil accumulation problem of the wind wheel: oil does not adhere evenly; it accumulates at the base of the blade and on the back of the ribs, and the oil drip at these spots can reach several times the blade surface. Low surface energy modification solves "less snagging," while the oil conduction structure solves "sting but can leave." The best results are achieved when both methods are used together.
A client's modification plan included a flow guide groove on the back of the reinforcement bar, combined with low surface energy material, reducing oil accumulation by 60%, and noise complaints simultaneously decreased. Structure and material coordination is always better than working alone.
The chemical effect of oil fume on plastics mainly involves plasticization and swelling: the components in oil fume cause some plastic surfaces to swell and become sticky, making the sticky surfaces more prone to dust and oil accumulation, creating a vicious cycle. Oil resistance evaluation requires two lines of data: swelling rate and surface hardness changes.
Some customers' original plan showed a significant drop in surface hardness. After switching to an oil-resistant system, the cleaning cycle was extended from one month to three months, and the actual user experience was more noticeable than any laboratory indicator.
The enclosure components require dual flame retardancy and weather resistance, but most range hood shells are installed indoors, with light UV exposure and heavy flame retardant load. There is also thermal radiation directly above the stove, with local temperatures much higher than the environment. The long-term temperature resistance of the shell material must be calculated based on the actual temperature after the heat radiation is added, not by the ambient temperature.
Some projects selected low-cost shell materials at room temperature. In summer, the kitchen shells soften and deform during high temperatures, and the lessons from rework have added a new column for stove heat radiation in their work charts.
Disassembly and washing is an unavoidable user behavior in this category: many modern range hoods support disassembly and even come with built-in cleaning functions, and the plastic parts periodically come into contact with cleaning liquid and hot water. Self-cleaning models use high-temperature steam circulation for cleaning, and the working temperature range of parts is wider than those without cleaning. Asking about the cleaning method before choosing is the first question in this category.
Some customers use different material solutions for both the no-disassembly and washable models, and both solutions run very smoothly.
The plastic parts of the switch and button also have oil contamination issues: oil mist seeps through the gaps of the button and sticks to the internal springs and contacts, causing poor contact. The material requirements for these small parts are not related to appearance, but to dimensional stability and oil resistance, using low-absorption and oil-resistant systems combined with dustproof rib designs.
The material budget for small parts is not high, but complaints about breakdowns are extremely poor. Many users replace their entire machines due to button malfunctions, and this is worth paying for to decision-makers. The differences brought by installation location by
are also worth recording: Chinese kitchen range hoods are generally installed low, and cases where flames reach the edges are not legendary; the temperature resistance of the lower edge of the intake hood should be evaluated based on short-term open flame contact. Some factories added metal edging to the lower edge of the intake hood, costing only a few yuan, which eliminates the risk of recall in an extreme scenario.
The principle for handling extreme scenarios is to solve the problem with structure and edging, not relying on materials to bear the load. This is a general approach in safety design.
To wrap up, here's a statistic: the average replacement cycle for range hoods is around ten years, and the plastic parts should be designed for a lifespan of fifteen years, because residual parts after disassembly and cleaning must continue to be used. For fifteen-year oil and heat resistance testing, accelerated testing is commonly used. The industry commonly uses a combination of hot oil soaking and circulating hot air.
This verification runs at a high cost, but when you add up to the fifteen-year after-sales budget, it's the cheapest cost in the entire product line.
Another hidden electrical component worth noting: the capacitor and terminal mounting mount. This location is close to the motor and the temperature is high, so oil mist can seep in. The material requirements are a combination of flame retardancy, oil resistance, and dimensional stability.
Its unit price doesn't rank in the top ten of the entire machine, but its fault is abnormal machine start, and users' repair decisions directly point to the overall machine quality. Our advice to several customers is the same: choose small parts according to the standards of large parts, because users never look at the parts list for complaints.
For positions like fixed seats, they can rank lower on the material budget list, but not on the standard list.
Conclusion
The core pain points of range hoods are the simultaneous presence of "oil resistance, heat resistance, and flame retardancy." For the exterior, ASA is chosen to solve appearance issues, while the fan wheel is made of PA66-GF30, with flame retardancy and oil-resistant modification being the mainstream direction.
For over ten years, we have been doing only one thing: making nylon usable.
For long-term material selection for home appliance kitchen components, we can discuss it together.
