摄像头进一次水，整颗镜头报废。摄像头防水圈漏一滴，维修贵一百倍。
结论先摆：摄像头防水圈，密封耐候绑一起
摄像头防水圈是“镜头的防水墙”：淋雨、水汽、温差。材料要密封好、耐候、软硬平衡——结论先给：摄像头防水圈用 SEBS 基 TPE 是主流；户外摄像头，TPV 优先。
摄像头防水圈最大的坑：软硬都有的料，才叫全能。太软压不住，太硬漏气——软硬平衡，就是关键。
摄像头防水圈是功能件：漏一滴水，镜头就废。材料选对，镜头才稳——功能件，别省料钱。
TPE凭啥防水：软硬随调，密封还好
摄像头防水圈用 TPE 的理由：软硬可调、密封好、耐候、效率高——四条合起来，适合防水圈。
软硬是核心：硬度定压紧力。软硬平衡写进验收——太软压不住，太硬漏气。
密封不能省：水密、气密。密封测试（按标准）写进验收——漏一滴水，就是事故。
淋一天考它：淋雨、温差、装配
淋雨工况：户外淋雨。水密测试（按标准）写进验收——漏水，就是事故。
温差工况：冬天夏天温差。耐温耐冷两头验——低温发硬，密封就漏。
安装工况：装配压缩量。压变数据要验——压变大了，密封就松。
TPE还是硅胶：防水圈上见漏不漏
| 维度 | TPE | 硅胶 |
|---|
| 密封 | 好 | 好 |
| 软硬 | 可调 | 软 |
| 耐候 | 好 | 极好 |
| 成本 | 低 | 中高 |
| 效率 | 注塑 | 硫化 |
| 批次 | 稳 | 稳 |
表格读法：硅胶耐候极好但贵、硫化慢；TPE 软硬可调、效率高——量产件，TPE 是主流。
极端户外场景硅胶留，常规 TPE——按场景选。
两个坑：软硬失衡、密封造假
坑一：软硬失衡。太软压不住，太硬漏气——软硬平衡，写进验收。
坑二：密封虚标。纸面水密，实测漏水——密封按实测验收。
坑三：耐候漏测。晒几年开裂——氙灯老化，户外件必测。
防水验收：泡水、压变、耐候
三问：硬度多少、密封按什么标准、耐候按多少小时。一验：淋雨实测——三问一验，供应商底细清楚。
软硬验证要先行：软硬都有的料，才叫全能。先测硬度窗口，再谈密封——软硬，就是骨架。
留样要成习惯：每批留样，密封耐候按批次复测。批次换料先对比再放量——批次稳，客诉少。
压缩永久变形是防水圈的“记性”，25% 压缩 ≤30% 才合格。 压缩量按 15%-25% 设计，压变大了用半年密封力就掉，长期受压回弹要好。
太软压不住、太硬漏气——软硬平衡按装配结构算。 Shore A 按防水圈口径和压缩量定档，让供应商按装配结构推荐硬度，别拍脑袋。
户外摄像头盐雾和 UV 一个都不能漏。 海边泡盐雾、南方直晒 UV，氙灯 1000h 加湿气循环老化，室内数据糊弄不了户外件。
负压检漏比看材料报告直观——密封是装配后的结果。 装好好放进负压仓抽真空，压缩量、硬度、结构一次暴露，三样对了防水圈才立得住。
防水圈失效换的是整个镜头模组，不是一个圈。 软硬、压变、耐候三张表一起核，漏一滴水维修费比圈贵一百倍。
摄像头防水圈验收要点表
| 项目 | 测试方法 | 合格线 |
|---|
| 硬度 | Shore A | 按设计 ±3 |
| 压缩永久变形 | 25% 压缩 | ≤30% |
| 水密 | 负压检漏 | 无泄漏 |
| 耐候 | 氙灯老化 | 1000h 无裂 |
| 批次 | 三批抽检 | 数据一致 |
摄像头防水圈常见问题与对策表
| 现象 | 原因 | 对策 |
|---|
| 漏水 | 压缩量不足 | 加厚或调硬度 |
| 漏气 | 硬度偏高 | 降硬度档 |
| 低温发硬 | 耐寒不足 | 换耐寒配方 |
| 晒裂 | UV 老化 | 加抗UV助剂 |
| 批次波动 | 配方漂移 | 锁配方窗口 |
防水圈靠压缩量密封，按 15%-25% 设计压超 30% 回不来。 压变 >30%(70℃×22h) 的料别做长期受压密封件，回弹不动就漏水。
防水圈软硬要配平，太硬压不密、太软永久变形。 Shore A 50-60 贴口不挤，装上去一周回弹才见真章。
圈体耐候按紫外和高低温验，户外摄像头别省。 晒硬裂、冻脆断都是漏水源头，批次留样按季度复测。
科隆客户案例：收缩率不稳尺寸波动，换体系续三单
重庆一家电子消费厂，摄像头防水圈收缩率不稳，尺寸波动大。科隆配合换体系换牌号（SEBS 基换 TPV 基），尺寸稳定，客户连续三个批次续单。体系换了，尺寸问题从源头断——收缩率是体系级问题。
小结
摄像头防水圈的选型，软硬先平衡，密封再实测，两件事的顺序别颠倒。
十几年，只做一件事：把尼龙改成能用的样子。
PA6、PA66 是基本盘，PA46、PA6T、PA9T 是耐高温的门槛，PA11、PA12 管水路和油路，尼龙合金补单一树脂给不了的平衡。改性热塑性弹性体、改性尼龙、改性 PPO、PPS 并行，还有各大化工巨头的尼龙树脂、副牌料、大包料现货。
同一块料，用错地方就是事故。所以先问件，再问料。
If water gets into the camera even once, the entire lens is ruined. If the waterproof ring of the camera leaks even a drop, repairs cost a hundred times more.
Conclusion first: Camera waterproof ring, sealed and weather-resistant, tied together
The waterproof ring of a camera is the 'waterproof wall of the lens': rain, moisture, temperature differences. The material needs to be well-sealed, weather-resistant, and have a balanced softness and hardness — conclusion first: SEBS-based TPE is mainstream for camera waterproof rings; for outdoor cameras, TPV is preferred.
The biggest pitfall of waterproof rings for cameras: only materials that are both soft and hard can be called versatile. Too soft and it won't compress properly; too hard and it will leak—finding the right balance between soft and hard is the key.
The waterproof ring of the camera is a functional component: if even a drop of water leaks in, the lens will be ruined. Only if the material is chosen correctly will the lens be stable—it's a functional component, don't skimp on materials.
Why is TPE waterproof: softness and hardness adjustable, and sealing is also good
Reasons for using TPE for the camera waterproof ring: adjustable hardness, good sealing, weather resistance, and high efficiency—together, these four make it suitable for a waterproof ring.
Softness and hardness are key: hardness determines clamping force. The balance between soft and hard is written into the acceptance criteria — too soft won't clamp, too hard leaks air.
Sealing cannot be neglected: watertight and airtight. Seal tests (according to standards) must be recorded in the acceptance process—if even a drop of water leaks, it is an accident.
Test it by exposing it to one day of rain: rain, temperature difference, assembly
Rain test conditions: Outdoor rain. Water tightness test (according to standards) written into acceptance—leakage is an accident.
Temperature difference conditions: the temperature difference between winter and summer. Tested for both heat and cold—becomes hard at low temperatures, and the seal then leaks.
Installation condition: assembly compression amount. Pressure variation data must be checked — if the pressure variation is large, the seal will loosen.
TPE or silicone: check for leaks on the waterproof ring
| Dimension | TPE | Silicone |
|---|
| Seal | Good | Good |
| soft and hard | Adjustable | soft |
| weather-resistant | Good | Excellent |
| Cost | Low | Medium-high |
| Efficiency | Injection molding | Vulcanization |
| Batch | Stable | Stable |
Table reading: Silicone has excellent weather resistance but is expensive and vulcanizes slowly; TPE hardness can be adjusted and efficiency is high— for mass-produced parts, TPE is mainstream.
For extreme outdoor scenarios, choose silicone; for regular TPE — select according to the scenario.
Two pitfalls: imbalance between softness and hardness, and fake sealing
Pitfall 1: Imbalance between softness and hardness. Too soft and it can't hold, too hard and it leaks air — balance between softness and hardness should be included in the acceptance criteria.
Pitfall 2: False labeling of sealing. Water-resistant on paper, but leaks in actual measurement — sealing should be inspected and accepted based on actual tests.
Pitfall 3: Weather resistance under-test. Cracking after a few years of sun exposure — xenon lamp aging, outdoor parts must be tested.
Waterproof Acceptance: Water Immersion, Compression Deformation, Weather Resistance
Three questions: What is the hardness, according to what standard is the sealing, and how many hours of weather resistance? One test: Rain test—three questions and one test, the supplier's details are clear.
Verification of softness and hardness should come first: Only materials that have both soft and hard qualities can be called versatile. Test the hardness window first, then discuss sealing—softness and hardness are the framework.
Making sample retention a habit: retain samples from each batch, seal them, and conduct periodic retests by batch. Compare before scaling up with a new batch of material — stable batches lead to fewer customer complaints.
Compression set is the 'memory' of a waterproof ring; it is considered qualified if 25% compression ≤ 30%. The compression amount is designed at 15%-25%; if the compression set is too large, sealing force will decrease after half a year, so long-term resilience under pressure should be good.
Too soft and it can't hold down, too hard and it leaks air — balance softness and hardness according to the assembly structure. Shore A is set according to the diameter and compression of the waterproof ring, letting the supplier recommend the hardness based on the assembly structure, don't make decisions on a whim.
Outdoor cameras cannot miss either salt spray or UV. Soak in salt spray by the sea, expose directly to UV in the south, xenon lamp 1000h with humidified air circulation aging; indoor data cannot fool outdoor components.
Negative pressure leak testing is more intuitive than looking at material reports—sealing is the result after assembly. After properly assembling, put it into a negative pressure chamber to vacuum it; compression, hardness, and structure are all revealed at once, and only when all three are correct can the waterproof ring stand.
When the waterproof ring fails, the entire lens module is replaced, not just the ring. The three tables for hardness, compression, and weather resistance are checked together, and a single drop of water costs a hundred times more in repair than the ring.
Camera Waterproof Ring Acceptance Checklist
| Project | Test method | Passing line |
|---|
| Hardness | Shore A | ±3 by design |
| Compression set | 25% compression | ≤30% |
| Watertight | Negative pressure leak detection | Leak-proof |
| weather-resistant | Xenon lamp aging | 1000h no cracks |
| Batch | Three rounds of random inspections | Data consistency |
Common Problems and Solutions Table for Camera Waterproof Rings
| Phenomenon | Reason | Countermeasure |
|---|
| Water leakage | Insufficient compression | Thicken or adjust hardness |
| air leak | Hardness is relatively high | Reduce hardness level |
| Hardening at low temperature | Insufficient cold resistance | Switch to a cold-resistant formula |
| Sunburned and cracked | UV aging | Add UV-resistant additive |
| Batch fluctuation | Formula Drift | Lock Recipe Window |
The waterproof ring seals by compression. It is designed for 15%-25% compression; if compressed over 30%, it will not return. Materials with compression deformation >30% (70℃ × 22h) should not be used for long-term compression seals, as they will leak if they do not rebound.
The waterproof ring's hardness should be balanced; if it's too hard, it won't seal tightly, and if it's too soft, it will permanently deform. Shore A 50-60 won't squeeze when fitted, and the true effect is only seen after a week of rebound once installed.
The enclosure's weather resistance should be tested for UV and high and low temperatures; don't skimp on outdoor cameras. Sun-induced cracking and frost brittleness are sources of leaks, and batch samples should be re-tested quarterly.
Cologne Customer Case: Unstable shrinkage and size fluctuations, continued three orders after changing the system
An electronics consumer factory in Chongqing had unstable shrinkage rates for the waterproof rings of their cameras, resulting in large size fluctuations. With Cologne's assistance in changing the system and the grade (from SEBS-based to TPV-based), the size stabilized, and the customer placed repeat orders for three consecutive batches. After changing the system, the size issue was solved at the source — shrinkage rate is a system-level problem.
Summary
When selecting a waterproof ring for a camera, first balance softness and hardness, then test the sealing; don’t reverse the order of these two steps.
For more than ten years, I've been doing only one thing: turning nylon into something usable.
PA6 and PA66 are the basic materials, PA46, PA6T, and PA9T are the high-temperature threshold materials, PA11 and PA12 are used for water and oil channels, and nylon alloys supplement the balance that a single resin cannot provide. Modified thermoplastic elastomers, modified nylons, modified PPO, and PPS run in parallel, along with nylon resins, generic materials, and bulk material stock from major chemical giants.
Using the same material in the wrong place can lead to accidents. So first ask about the part, then ask about the material.
