82 冰箱门把手与抽屉滑轨：长期低温 + 反复开合 + 食品接触怎么选
一、冰箱件的两套工况
门把手与表面件：
接触人手汗液（含盐、酸）。
反复开合 50-200 万次。
温度：冷藏区 0-8℃，冷冻区 -18℃ 以下。
食品级合规（材料与食品气相空间）。
抽屉滑轨：
高循环载荷（拉出 / 推回 50 万次以上）。
低温冲击 -25℃。
长期承重（食品 + 容器 20-50 kg）。
滑轨咬合齿轮机构（PEEK / POM 自润滑优势）。
冰箱厂的低温测试房常年零下十八度，进去拿件的人出来都要搓搓手。有个结构工程师说过一件小事：门把手的三种打样件放进冷冻室，第二天拿出来徒手掰，有一种当场裂了，声音脆得像踩断冰棍。
裂的那种是普通 PA6，常温韧性数据漂亮，低温下全数吐回。定版的方案是低温增韧体系，价格贵一点，工程师的话是：用户清早空着手开门，谁也不管什么数据，裂了就是事故。
低温这一关，冰箱件绕不过去，实验室的手感也不骗人。
二、门把手主选方案
① PA6-GF30 + 食品级配方
性价比主流。通过 FDA / EU 食品级，但只对间接接触（气相空间）合规。
② PA66-GF30 + 食品级配方
强度更好，适合承重门把手。
③ PA12 长碳链 + 食品级
吸湿低、尺寸稳定。适合要求"长期尺寸不漂移"的项目。
三、滑轨主选方案
滑轨齿轮
POM（共聚）自润滑 + 食品级配方。
PA66-GF30 也可，但要做自润滑改性。
滑轨主体
PA66-GF30 + 食品级配方。
滑轨弯角与滑道必须圆滑，否则磨损加快。
四、关键性能对照
| 指标 | PA6-GF30 | PA66-GF30 | POM（共聚） |
|---|
| 食品级合规 | 容易 | 容易 | 容易 |
| 低温冲击 | 中 | 中偏好 | 中 |
| 反复开合 | 中 | 好 | 极好 |
| 尺寸稳定（低吸水） | 中 | 中偏好 | 极好 |
| 单价 | 1.0× | 1.4× | 1.1× |
五、四个常见坑
① 食品级误以为是"全料合规"
食品级配方是特定配方目录。同样 PA6，不同改性体系配方可能不是同一个目录。采购合同要写清"配方目录号"。
② 反复开合用通用 PA6
通用 PA6 在 -18℃ 反复开合 50 万次后冲击强度下降 30-50%。要增韧或换 PA66。
③ 滑轨齿轮用 PA66-GF + 不润滑
PA66-GF + GF 摩擦系数高，滑轨在反复滑动中会磨出粉末。必须加自润滑层或换 POM。
④ 焊线强度低
门把手组装件用通用 PA6 焊接，焊线在 50 万次循环后开裂。要双增韧 + 焊接专料。
六、边界声明
| 工况 | 建议 |
|---|
| 普通冷藏区门把手 | PA66-GF30 + 食品级配方 |
| 冷冻区门把手 | PA66-GF30 + 增韧 + 食品级 |
| 抽屉滑轨齿轮 | POM（共聚）+ 食品级 |
| 抽屉滑轨主体 | PA66-GF30 + 食品级 |
| 间接接触（气相空间） | 通用食品级配方 |
| 直接接触（液体类） | 走专项配方 |
一批抽屉滑轨的卡滞风波
起点是冷冻抽屉滑轨的滚轮用普通 PA6，滑动测试在常温下完全正常。
潜伏期三个月，用户投诉集中在冬季：抽屉推拉发涩，声音发闷。
排查发现低温下 PA6 吸水后模量变化，滚轮与轨道的配合间隙被吃掉，摩擦变大。北方冬季的室内温差与冷冻室的低温循环，把这个隐患推成了投诉。
结算动作：滚轮换低吸水耐磨体系、轨道配合公差按低温校核、抽拉寿命测试加低温档。之后两个冬季售后安静。
冰箱件的会议，三个追问。
追问一：件在冷冻室还是冷藏室？ 两个舱的温湿循环完全不同，分开验收。
追问二：接触食品吗？ 接触件走食品接触合规，别拿通用料顶。
追问三：低温冲击实测过吗？ 零下十八度徒手掰，比任何常温报告诚实。
延伸：常见问题与排查
冰箱件常见问题集中在四类：
问题一：门把手反复开合开裂
PA66 通用配方在 -18℃ 反复开合 50 万次后冲击下降 30-50%。第一步：测低温脆化曲线，确认是否要加增韧。第二步：改用 PA66 + 增韧配方或 PA 长碳链 + 增韧。
问题二：滑轨齿轮磨损粉末
PA66-GF 摩擦系数高、无油润滑下磨出粉末污染抽屉。第一步：换成 POM（共聚）。第二步：粉末不能进入食品接触区域，需密封设计。
问题三：食品级目录错
很多项目以为"通用食品级配方"合规，实际是特定目录号 + 配方号——采购合同要写清"目录号 + 配方号 + 检测报告"三件套。
问题四：焊线位置多次循环开裂
通用 PA6 焊接的把手焊线 50 万次循环后开裂。双增韧 + 焊接专料是稳定解。
这四条之外还有"低温测试"——冷冻区把手必须在 -25℃ 测试 50 万次反复开合，通过率不足时应改用 PA 长碳链 + 增韧方案。
实战：四个工程测试
测试一：50 万次反复开合循环。-18℃ 冷冻区：通用 PA66 50 万次冲击下降 30-50%；PA66-GF + 增韧：保留率 ≥80%。
测试二：滑动齿轮磨损测试。100 万次拉推循环，POM（共聚）磨耗 ≤1 mm³；PA66-GF 磨耗 5-10 mm³ 且污染抽屉。
测试三：食品级合规确认。目录号 + 配方号 + 检测报告 三件套齐全。通用配方 ≠ 食品级合规。
测试四：焊线低温循环。50 万次 + -25℃，通用 PA6 焊线在 10 万次循环开裂；PA66 + 增韧 + 焊接专料可撑过 50 万次。
关键提示
冰箱件"50 万次反复开合 + -18℃ 低温"是基本疲劳测试；滑轨齿轮还要加100 万次磨损测试。任何一项失败，量产两年内集中报退。
工程备忘
冰箱件的"低温反复开合 + 食品级 + 长寿命"三件套中，通用配方撑不到 50 万次循环。PA66 + 增韧 + 焊接专料 + 食品级目录是稳的方案。
行业感
冰箱件"50 万次反复开合 + 食品级 + 长寿命"是三件套。通用 PA6 在 -18℃ 反复开合 50 万次后冲击下降 30-50%。
收尾补一张三问三答。
| 高频问题 | 一句话回答 |
|---|
| 把手首选什么？ | 低温增韧 PA6 或 ABS 拼合，按外观定 |
| 滑轨滚轮呢？ | 低吸水耐磨 PA66 或 POM |
| 低温测试怎么定档？ | 零下十八度放透后测，保温时间写死 |
| 门封条呢？ | 那是软胶的领域，别用尼龙硬凑 |
补一个关于结露的提醒： 冷冻件从低温环境拿到常温，表面立刻结露，水膜反复干湿是涂层与表面的杀手。把手与滑轨的表面处理要过结露循环测试，有厂子把这一项加进验收后，冬季的外观投诉降了一半。低温是冰箱件的底色，结露是低温的影子，两个都要写进工况表。
深一层：冰箱件的现场知识
冰箱件的工况特点是长、稳、冷：寿命要求十年起步，载荷温和但从不间歇，温度常年低温。这三条里最容易被低估的是"从不间歇"——冰箱件的疲劳循环是全天候的，开门、关门、抽拉、推回，一天几十上百次，十年就是几十万次。
这个量级的循环数，很多工业件都达不到。滑轨、铰链、卡扣这些动作件，疲劳数据比静态强度重要得多，验收文件里循环次数这一栏，建议按十万次起步写。
冷冻室的低温还有一个隐藏面：低温让塑料变脆的同时，也让油脂与润滑剂变稠。滑轨系统的润滑脂在低温下粘度上升，滚轮的阻力增大，与材料模量变化叠加，冬季的推拉手感就变了。
选型时要把低温润滑脂与低温塑料当成一个系统来选，分开选各自达标的组合，装在一起未必达标。有客户把润滑脂供应商与塑料供应商拉到一张桌上对参数，一次会议解决了一个冬天的投诉。
门把手的外观件属性让它有另一套考卷：手汗、清洁剂、指甲划痕。把手天天被手摸，手汗里的盐分与皮脂是温和但持久的介质，清洁剂则可能是强碱。
表面处理的选择要过手汗与清洁剂两道验证，特别是电镀件，镀层的针孔会让介质钻到基材，鼓泡从里面长出来。外观件的失效，一半在表面处理的附着力上。
抽屉与隔板的承载件还有个冷知识：塑料的冷流。长期承载的隔板，几年后会沿着支撑线出现轻微的永久弯曲，用户描述为隔板塌了。冷流与蠕变同源，对抗手段是加筋与提高模量，但加筋增加重量，隔板的重量又影响用户体验，这里有个平衡点。
行业里成熟的做法是按满载工况做蠕变评估，把五年后的挠度控制在视觉不可见的范围。
冰箱件的尺寸链还有一个特点：整机装配在常温，服役在低温，两种温度下的配合公差是两套。塑料件的收缩系数与金属铰链不同，门体间隙的设计要按服役温度校核，常温下完美的间隙到低温可能变成卡滞或漏冷。
有厂子吃过这个亏，新品上市后北方用户投诉门体异响，最后按低温校核重新分配了公差解决。
食品接触这个话题在冰箱件上比想象中常见：冷藏室的隔板、蛋架、瓶座都可能直接接触食物，这些位置的合规要求与厨房电器一致。
合规文件的管理前文说过，这里补一句冰箱特有的：冷藏室的高湿环境会加速不符合规的析出，实验室常湿条件下的合格数据在冷藏室里会打折扣。接触件的验证要按高湿条件复测，这是冰箱与常温家电在合规上的差异点。
说一个维修视角的观察：冰箱塑料件的报修率与温度传感器的关系。有些机器的冷藏室温控偏移，实际温度比设定低几度，用户不会发现温度问题，只会发现抽屉裂了、饮料冻了。
售后接到塑料件投诉时，顺手记录当时箱内实际温度，能把材料问题与环境问题分开。这个习惯的成本是零，收集一年的数据就能绘制出真实的温度分布图，对下一代的材料选型是无价之宝。
最后讲讲冰箱件的分级策略：冷冻室件、冷藏室件、外部件三档，材料成本递减。冷冻室件用低温增韧加低吸水，冷藏室件用常规改性体系，外部件用成本优先的通用方案。三档的边界画清楚，材料预算的效率最高。
有整机厂把这套分级做成了选材手册，新项目立项直接对档取料，选型周期从两周缩到两天。手册化的选型，是规模化企业的必修课。
冰箱件的运输环节也值得单独说：整机运输的低温与振动是叠加的，冷链物流里的冰箱要经历零下的货厢温度加路面振动，塑料件在这段旅程里的表现与实验室的静置低温不同。
有出口项目在海运冷柜里泡了一个月，到岸后抽屉支架的卡扣脆断率升高，排查发现是低温加振动让装配内应力释放成了微裂纹。运输验证加一段低温振动，能把这类事故挡在港口之前。
冰箱的售后有相当比例发生在开箱环节，那段旅程的材料标准，别让它成为工况表上最薄的一页。
结语
冰箱件是 PA66-GF30 + 食品级 + 增韧（按需）的标准工况。关键是分清"间接接触"与"直接接触"——目录不同。
十几年，只做一件事：把尼龙改成能用的样子。
家电食品接触件长期料号选择，可以一起聊。
82 Refrigerator door handles and drawer rails: long-term low temperatures, repeated opening and closing, how to choose for food contact
1. Two sets of operating conditions for the refrigerator components
Door handles and surface components:
Contact with human hand sweat (including salt and acid).
Repeatedly opened and closed 500,000 to 2 million times.
Temperature: Refrigerated section 0-8℃, frozen section below -18℃.
Food-grade compliance (materials and food air space).
Drawer slide:
High cycle load (pull out / push back over 500,000 times).
Low temperature shock -25°C.
Long-term load-bearing (food containers 20-50 kg).
Slide rail meshing gear mechanism (PEEK / POM self-lubricating advantages).
The low-temperature testing room at the refrigerator factory is kept at minus eighteen degrees year-round. Anyone who goes in to get something has to rub their hands afterward. A structural engineer once mentioned a small incident: three prototype samples of a door handle were put into the freezer, and when taken out the next day to be bent by hand, one of them cracked on the spot, making a crisp sound like snapping an ice pop.
The cracked type is ordinary PA6, with nice toughness data at room temperature, but it completely fails at low temperatures. The finalized solution is a low-temperature toughening system, which is a bit more expensive. As for the engineers, they say: early in the morning, the user opens the door empty-handed, no one cares about any data, if it cracks, it's an accident.
When it comes to low temperatures, the refrigerator parts can't be avoided, and the feel in the lab doesn't lie.
2. Main Selection Plan for Door Handles
① PA6-GF30 Food Grade Formula
Cost-effective and mainstream. Approved by FDA/EU for food grade, but only compliant for indirect contact (air phase space).
② PA66-GF30 Food-grade formulation
Stronger, suitable for load-bearing door handles.
③ PA12 Long carbon chain, food grade
Low moisture absorption, dimensionally stable. Suitable for projects that require 'long-term dimensional stability'.
3. Main Options for Slide Rail
Sliding rail gear
POM (copolymer) self-lubricating, food-grade formula.
PA66-GF30 is also acceptable, but it needs to be modified for self-lubrication.
Slide rail body
PA66-GF30 Food grade formula.
The bends of the slide rail and the slide path must be smooth, otherwise wear will accelerate.
4. Key Performance Comparison
| Indicator | PA6-GF30 | PA66-GF30 | POM (copolymer) |
|---|
| Food Grade Compliance | Easy | Easy | easy |
| Low temperature shock | middle | medium preference | middle |
| Repeatedly opening and closing | middle | Good | Excellent |
| Dimensional stability (low water absorption) | middle | medium preference | Excellent |
| Unit price | 1.0× | 1.4× | 1.1× |
5. Four Common Pitfalls
① Food grade mistakenly thought to be 'fully compliant with all ingredients'
Food-grade formulations refer to specific formulation catalogs. Similarly, for PA6, different modified system formulations may not belong to the same catalog. The purchasing contract must clearly specify the 'formulation catalog number'.
② Repeated opening and closing uses general-purpose PA6
General PA6 experiences a 30-50% decrease in impact strength after 500,000 cycles of opening and closing at -18°C. Toughening is needed or PA66 should be used instead.
③ Sliding rail gears use PA66-GF, no lubrication
PA66-GF GF has a high coefficient of friction, and the guide rail will produce powder after repeated sliding. It is necessary to add a self-lubricating layer or switch to POM.
④ Low solder joint strength
The door handle assembly is welded using general PA6, and the weld line cracks after 500,000 cycles. A specialized welding material with double toughening is required.
6. Boundary Declaration
| Operating condition | Suggestion |
|---|
| Regular refrigerated area door handle | PA66-GF30 Food Grade Formula |
| Freezer Compartment Door Handle | PA66-GF30 Toughened Food Grade |
| Drawer slide gear | POM (Copolymer) Food Grade |
| Drawer slide main body | PA66-GF30 Food Grade |
| Indirect contact (gaseous space) | General food-grade formula |
| Direct contact (liquid type) | Use a specialized formula |
A batch of drawer slide sticking controversy
The starting point is that the rollers of the freezer drawer slide rails use ordinary PA6, and the sliding test is completely normal at room temperature.
The incubation period is three months, and user complaints are concentrated in winter: drawers are hard to pull, and the sound is muffled.
Investigation found that under low temperatures, after PA6 absorbs moisture, its modulus changes, the clearance between the roller and the track is taken up, and friction increases. The indoor temperature difference in northern winters and the low-temperature cycling of the freezer caused this hidden problem to turn into complaints.
Settlement action: Replace the roller with a low water absorption and wear-resistant system, check the track fit tolerance according to low-temperature verification, and add a low-temperature setting for the draw test life. After that, two winters of after-sales are quiet.
Meeting about the refrigerator parts, three follow-up questions.
Follow-up question 1: Is the item in the freezer compartment or the refrigerator compartment? The temperature and humidity cycles of the two compartments are completely different, so they should be inspected separately.
Follow-up Question 2: Does it come into contact with food? Components that come into contact with food must comply with food contact regulations; don’t use general materials as a substitute.
Follow-up Question 3: Have you actually tested the low-temperature impact? Breaking it by hand at minus 18 degrees is more honest than any room-temperature report.
Extension: Common Problems and Troubleshooting
Common problems with refrigerators are concentrated in four categories:
Question 1: The door handle repeatedly cracks from opening and closing
After 500,000 cycles of repeated opening and closing at -18°C, the impact of the PA66 general formula decreases by 30-50%. Step 1: Measure the low-temperature embrittlement curve to determine if toughening needs to be added. Step 2: Switch to a toughened PA66 formula or use PA long-chain toughening.
Question 2: Sliding rail gear wear powder
PA66-GF has a high friction coefficient, and under oil-free lubrication, it grinds into powder that contaminates the drawer. Step one: switch to POM (copolymer). Step two: the powder must not enter areas in contact with food, so a sealed design is required.
Question 3: Food-grade catalog error
Many projects think the "universal food-grade formula" is compliant, but in reality, it's a specific catalog number + formula number—the procurement contract must clearly state the "catalog number + formula number + test report" three-piece set.
Issue 4: Multiple cycles of wire welding at the wire welding position
Handle weld wire for general PA6 cracks after 500,000 cycles. Dual toughening + welding of special material is the stable solution.
Besides these four items, there is also a "low-temperature test"—the handle in the frozen zone must be tested at -25°C for 500,000 repeated openings and closings. If the pass rate is insufficient, switch to a PA long carbon chain + toughening solution.
Practical: Four engineering tests
Test one: 500,000 repeated opening and closing cycles. -18°C freezing zone: General PA66 reduces 500,000 impacts by 30-50%; PA66-GF + toughening: retention rate ≥80%.
Test 2: Sliding gear wear test. 1 million pull-push cycles, POM (copolymer) wear ≤1 mm³; PA66-GF wears 5-10 mm³ and contaminates drawers.
Test 3: Food-grade compliance confirmation. Catalog number + formula number + test report—complete three-piece set. Universal formula ≠ food-grade compliant.
Test 4: Wire welding low-temperature cycling. 500,000 cycles + -25°C, universal PA6 welding wire cracks after 100,000 cycles; PA66 + toughening + welding special material can withstand 500,000 cycles.
Key Tips
Refrigerator Parts "500,000 repeated opening and closing cycles + -18°C low temperature" is the basic fatigue test; Slide rail gears also require 1 million wear tests. Any failure will result in centralized retirement within two years of mass production.
Engineering Memo
Among the refrigerator parts' "low-temperature repeated opening and closing + food-grade + long lifespan" three-piece set, the general formula cannot withstand 500,000 cycles. PA66 + toughening + welding special material + food-grade catalog is a stable solution.
Industry Sensibility
Refrigerator Parts"500,000 Repeated Opening/Closing Cycles + Food-Grade + Long Life" is a three-piece set. General PA6 drops by 30-50% after 500,000 repeated opening and closing at -18°C.
Closing with a three-question and three-answer post.
| High-Frequency Questions | One-sentence Answer |
|---|
| Which handle should you prefer? | Low-temperature toughening PA6 or ABS assembly, decide based on appearance |
| What about slide rail rollers? | Low water absorption and wear-resistant PA66 or POM |
| How to set the low-temperature test schedule? | After fully soaking at -18 degrees, the retention time is fixed |
| Where's the door seal? | That's the field of soft rubber, don't force it with nylon |
A reminder about condensation: When refrigerated parts are taken from a low-temperature environment to room temperature, condensation immediately appears, and repeated wet and dry water films are killers of the coating and surface. The surface treatment of handles and slides must pass condensation cycle tests. After some factories added this item to acceptance, winter appearance complaints dropped by half. Low temperature is the base color of refrigerator parts, condensation is the shadow of low temperatures; both must be recorded in the condition sheet.
Deeper Layer: On-site Knowledge of Refrigerator Parts
The characteristics of refrigerator parts are long, stable, and cold: lifespan requires at least ten years, mild but never intermittent, and temperature is consistently low. Among these three, the most easily underestimated is "never intermittent"—refrigerator parts have all-weather fatigue cycles: opening, closing, pulling, pushing back, dozens or hundreds of times a day, ten years is hundreds of thousands of cycles.
Many industrial parts cannot reach this level of cycle count. For moving parts like slides, hinges, and latches, fatigue data is much more important than static strength. In the acceptance documents, the cycle count column should be at least 100,000 cycles.
The low temperature in the freezer compartment has another hidden aspect: while low temperatures make plastics brittle, they also thicken grease and lubricants. The grease in the slide rail system viscosity increases at low temperatures, increasing roller resistance, and combined with changes in material modulus, the winter push and pull feel changes.
When selecting models, treat low-temperature grease and low-temperature plastic as one system, selecting combinations that meet their respective standards; assembling them together may not meet standards. A customer brought grease and plastic suppliers together to compare parameters, solving a winter's complaint in one meeting.
The appearance attributes of door handles give it another test: hand sweat, cleaning agents, nail scratches. Handles are touched daily; salt and sebum in sweat are mild but persistent media, and cleaning agents may be strong alkalis.
The choice of surface treatment must be verified through both hand sweat and detergent, especially for electroplated parts. Pin holes in the coating allow the medium to penetrate the substrate, causing bubbles to form inside. Half the failure of exterior parts lies in the adhesion of the surface treatment.
Another fun fact about drawers and shelves is cold flow in plastics. Shelves that bear long-term load will develop slight permanent bends along the support lines after a few years, with users describing the partition collapsing. Cold flow and creep share the same origin; countermeasures include reinforcement and increased modulus, but reinforcement adds weight and affects user experience. There is a balance here.
A mature industry practice is to conduct creep evaluations under full load conditions, keeping deflection within a visually invisible range after five years.
Another feature of refrigerator component size chains: the entire unit is assembled at room temperature and operates at low temperatures, with two sets of fit tolerances under these two temperatures. The shrinkage coefficient of plastic parts differs from metal hinges; the door gap design must be checked according to service temperature, so a perfect gap at normal temperature may become stuck or leak cool.
Some factories have suffered this loss: after the new product launched, northern users complained about door noises, but in the end, tolerances were redistributed based on low-temperature verification to resolve the issue.
Food contact is more common in refrigerator parts than expected: shelves, egg racks, and bottle holders in the refrigerator compartment may come into direct contact with food, and compliance requirements for these areas are consistent with kitchen appliances.
Management of compliance documents As mentioned earlier, here is a special mention of refrigerators: the high-humidity environment of the refrigerator room accelerates the release of non-compliant items, and the compliance data under normal humidity in the lab is discounted in the refrigerator compartment. Verification of contact parts must be retested under high humidity conditions, which is the compliance difference between refrigerators and ambient temperature appliances.
Sharing a maintenance perspective: the relationship between the repair rate of refrigerator plastic parts and temperature sensors. Some machines have temperature control deviations in the refrigerator compartment, with the actual temperature a few degrees below the set limit. Users won't notice temperature issues, only cracked drawers or frozen drinks.
When after-sales staff receive complaints about plastic parts, they casually record the actual temperature inside the box at that moment, separating material issues from environmental issues. This habit has zero cost; collecting data for a year can produce a real temperature distribution map, which is invaluable for next-generation material selection.
Finally, let's talk about the grading strategy for refrigerator parts: freezer compartment parts, refrigerator compartment parts, and external components, with three tiers, reducing material costs. Freezer compartments use low-temperature toughening with low water absorption; refrigerator compartments use conventional modification systems; external components use cost-priority general solutions. Clearly defined boundaries among these three tiers maximize material budget efficiency.
Some OEMs have made this grading manual into a material selection manual, directly matching materials for new project initiation, shortening the selection cycle from two weeks to two days. Manual selection is a required course for large-scale enterprises.
The transportation of refrigerator components also deserves special mention: the low temperatures and vibrations during full-machine transport are combined. In cold chain logistics, refrigerators must endure subzero cargo bed temperatures combined with road vibrations. The performance of plastic parts during this journey differs from the low temperatures of the laboratory when standing still.
An export project soaked in a sea frozen container for a month. After docking, the brittle break rate of drawer brackets increased. Investigation revealed that the combination of low temperature and vibration released internal assembly stress into microcracks. Transport verification combined with a period of low-temperature vibration can prevent such accidents before the port
A considerable proportion of refrigerator after-sales issues occur during the unboxing stage. The material standards for that stage of the journey should not be the thinnest page on the operating conditions sheet.
Conclusion
Refrigerator components follow the standard operating conditions of PA66-GF30, food-grade, toughened (as needed). The key is to distinguish between 'indirect contact' and 'direct contact' — the catalogs are different.
For more than ten years, we have focused on one thing: making nylon usable.
For long-term material selection of household appliance food-contact parts, we can discuss it together.
