头盔内衬用半年就粉化掉渣，撞一下不敢想。头盔内衬老化寿命没看对，护头就是心里安慰。
内衬用半年就粉化，撞一下不敢想
头盔内衬是“护头的件”：缓冲、透气、贴头。材料要缓冲好、透气、贴头——结论先给：头盔内衬用发泡 TPE 是主流；高强度头盔，EPP/EPS 复合留。
头盔内衬最大的坑：寿命短在哪，老化曲线知道。老化曲线平缓，寿命长；曲线陡，寿命短——老化曲线，是内衬的寿命表。
头盔内衬是安全件：缓冲失效，就是事故。材料选对，头盔才安全——安全件，别省料钱。
头盔内衬为什么用 TPE
头盔内衬用 TPE 的理由：缓冲可做、透气可做、贴头可做、可回收——四条合起来，适合内衬。
缓冲是核心：撞击缓冲。缓冲测试写进验收——缓冲失效，就是事故。
老化不能省：老化曲线写进验收，别只看新料手感。老化曲线写进验收——老化，是内衬的寿命表。
撞击透气老化，三道关
撞击工况：撞击缓冲。缓冲数据要验——失效，就是事故。
透气工况：骑行闷热。透气数据要验——闷汗，就是问题。
老化工况：长期使用。老化曲线要验——衰减，就是问题。
TPE 还是 EPP？内衬一表看清
| 维度 | TPE | EPP |
|---|
| 缓冲 | 可做 | 好 |
| 透气 | 可做 | 一般 |
| 贴头 | 好 | 中 |
| 成本 | 中高 | 中高 |
| 回收 | 可回收 | 可回收 |
| 用途 | 骑行盔 | 竞技盔 |
表格读法：EPP 缓冲好但透气一般；TPE 贴头透气好——骑行盔 TPE，竞技盔 EPP。
按用途选：竞技 EPP，骑行 TPE。
头盔验收：老化曲线这关
| 时间 | 缓冲 | 结论 |
|---|
| 新品 | 基准 | 留档 |
| 1 年 | 复测 | 对比 |
| 2 年 | 复测 | 对比 |
| 3 年 | 复测 | 结论 |
表格读法：老化曲线做起来，寿命长短看得见——热氧老化前后硬度差、冲击保留率都要留档。
老化曲线，是内衬的寿命表。
只看新料数据，三个坑
坑一：只看新数据。新料软、晒半年就脆，不做老化等于蒙眼选料——老化必看。
坑二：缓冲虚标。失效——缓冲按实测验收。
坑三：透气漏测。闷汗——透气测试，必测。
选内衬料先看老化寿命
三问：缓冲按什么标准、老化曲线有没有、透气怎么验。一验：实际佩戴实测——三问一验，供应商底细清楚。
老化验证要先行：先把热氧老化后保留率写进指标。先看曲线，再谈价格——老化曲线，是内衬的寿命表。
留样要成习惯：每批留样，缓冲透气按批次复测。批次换料先对比再放量——批次稳，客诉少。
内衬：出问题照着排雷，一表清
| 现象 | 原因 | 对策 |
|---|
| 塌陷 | 缓冲不足 | 换高缓冲料 |
| 发硬 | 老化 | 换耐老化料 |
| 闷汗 | 透气不足 | 加透气孔 |
| 异味 | 助剂迁移 | 换低析出料 |
| 批次差 | 配方漂移 | 锁窗口 |
头盔内衬发泡密度 0.05-0.10 g/cm³，缓冲按撞击加速度测。 老化曲线做 1/2/3 年三档，曲线陡寿命就短。
EPP 缓冲好但透气一般，TPE 贴头透气好但缓冲中等。 竞技盔 EPP，骑行盔 TPE 发泡——按盔型选。
内衬寿命短不是缓冲差，是老化曲线没盯。 新数据漂亮不代表三年后还缓冲，老化曲线要留档对比。
头盔内衬验收：缓冲撞击、透气、贴头测试、老化曲线。 安全认证按国标欧标核验，认证编号要供应商出。
缓冲过检加老化曲线平缓，内衬戴三年缓冲不衰减。 每批留样测缓冲加透气，盔型系列按用途给料。
头盔内衬走 SEBS 发泡路线，Shore 00 30-50 那档果冻感才贴头。 竞技盔 EPP 缓冲强，骑行盔 TPE 发泡贴头透气，发泡倍率直接决定缓冲厚度和重量，要按盔型定档。
内衬老化曲线按 70℃×22h 压变和三年留样对比验。 新料缓冲漂亮不代表三年后还兜得住，认证编号按国标欧标核，
缓冲撞击和透气分开测，认证报告随批走。
盔型系列按用途给料，缓冲和透气按三年寿命一起盯。 每批留样测缓冲加透气，新料数据漂亮要和三年后留样对比，
老化曲线平缓才敢签长期单。
缓冲件别只测新料，三年老化曲线要留档对比。 竞技盔EPP骑行盔TPE发泡按盔型定，缓冲撞击和透气分开验，
认证编号按国标欧标核，每批留样缓冲加透气。
科隆客户案例：交期紧现货对不上，重调配方补认证
泉州一家运动器材厂，头盔内衬交期紧，现货牌号性能对不上。科隆配合重调配方（油/助剂/填充比例），通过第三方检测并补齐认证，按期交付。配方重调，性能对上了，认证也齐了——交期紧，靠的是备好的方案。
小结
头盔内衬的选型，老化先看，缓冲再测，寿命短在哪老化曲线知道，老化曲线是寿命表。
The helmet liner crumbled into powder after just half a year; I can't imagine what would happen if I hit something. I didn't check the aging lifespan of the helmet liner properly, so wearing it is just a psychological comfort.
The lining crumbled after just half a year of use, I can't even imagine what would happen if it got hit.
The helmet liner is the 'part that protects the head': cushioning, breathability, and fitting the head. The materials need to cushion well, be breathable, and fit the head—here's the conclusion first: foam TPE is the mainstream for helmet liners; for high-strength helmets, EPP/EPS composites are retained.
The biggest problem with helmet liners: knowing where the short lifespan is, and understanding the aging curve. A gentle aging curve means a long lifespan; a steep curve means a short lifespan — the aging curve is the lifespan chart of the liner.
The helmet lining is a safety component: if the cushioning fails, it's an accident. Only with the right material is the helmet safe—it's a safety component, don't skimp on materials.
Why is TPE used in helmet liners
Reasons for using TPE for helmet lining: cushioning is possible, breathability is possible, fitting the head is possible, recyclable — together, these four make it suitable for lining.
Cushioning is key: impact cushioning. Cushioning tests are written into acceptance criteria—cushioning failure means an accident.
Aging can't be skipped: include the aging curve in acceptance tests, don't just rely on the feel of new material. Include the aging curve in acceptance tests—aging is the lifespan chart of the lining.
Impact, ventilation aging, three barriers
Impact condition: impact buffering. Buffering data must be verified — failure means an accident.
Breathability condition: riding feels hot and stuffy. Breathability data must be checked—if it causes sweaty discomfort, then it's a problem.
Aging condition: long-term use. The aging curve needs to be tested — decay, that's the problem.
TPE or EPP? Check the lining at a glance
| Dimension | TPE | EPP |
|---|
| Buffer | Can be done | Good |
| Breathable | Can be done | general |
| Post head | Good | middle |
| Cost | Medium-high | Medium-high |
| Recycle | Recyclable | Recyclable |
| Purpose | Cycling Helmet | Competitive helmet |
Table reading: EPP has good cushioning but average breathability; TPE fits the head and has good breathability — TPE for cycling helmets, EPP for competitive helmets.
Choose by use: competitive EPP, cycling TPE.
Helmet Acceptance: The Aging Curve Test
| Time | Buffer | Conclusion |
|---|
| New product | Benchmark | File for record |
| 1 year | Retest | Contrast |
| 2 years | Retest | Contrast |
| 3 years | Retest | Conclusion |
How to read the table: Create the aging curve, and you can see the lifespan — record the differences in hardness and impact retention before and after thermal-oxidative aging.
The aging curve is the lifespan chart of the lining.
Only looking at the new material data, three pitfalls
Pitfall 1: Only looking at new data. New material is soft and becomes brittle after six months of exposure; not conducting aging tests is like selecting material blindly — aging must be checked.
Pitfall 2: Overstated cushioning. Invalid — cushioning should be accepted based on actual measurements.
Pitfall 3: Air permeability testing failure. Sweat from stuffiness — air permeability test must be done.
When choosing lining material, first look at its aging life
Three questions: What is the standard for cushioning, is there an aging curve, how to test breathability. One test: actual wear test—three questions and one test, the supplier's details are clear.
Aging verification must come first: first write the retention rate after thermal-oxidative aging into the indicators. Look at the curve first, then discuss the price — the aging curve is the lifespan chart of the liner.
Making sample retention a habit: retain samples for each batch, and re-test the buffer ventilation by batch. When changing material for a batch, compare first before scaling up — stable batches lead to fewer customer complaints.
Lining: If there’s a problem, troubleshoot accordingly; everything is clear at a glance
| Phenomenon | Reason | Countermeasure |
|---|
| collapse | Insufficient buffer | Replace with high cushioning material |
| become hard | Aging | Replace with aging-resistant material |
| clammy sweat | Insufficient breathability | Add ventilation holes |
| Odor | Additive migration | Change to low precipitation material |
| Batch difference | Formula Drift | Lock window |
The foam density of the helmet liner is 0.05-0.10 g/cm³, and the cushioning is measured according to impact acceleration. The aging curve is made in three stages: 1/2/3 years; the steeper the curve, the shorter the lifespan.
EPP has good cushioning but average breathability, while TPE lining has good breathability but moderate cushioning. Competitive helmets use EPP, and cycling helmets use TPE foam—choose according to the helmet type.
A short lining lifespan is not due to poor cushioning; it's because the aging curve wasn't monitored. New data being good doesn't mean it will still cushion well after three years; the aging curve needs to be archived for comparison.
Helmet liner inspection: cushioning impact, breathability, head fit test, aging curve. Safety certification is verified according to national and European standards, and the certification number must be provided by the supplier.
The cushioning passing test and aging curve are smooth, and the lining does not degrade in cushioning after three years of use. Samples from each batch are tested for cushioning and breathability, and the helmet series is fed according to its intended use.
The helmet liner follows the SEBS foaming route, with a Shore 00 30-50 range giving that jelly-like feel that fits the head. Competitive helmets use EPP for strong cushioning, cycling helmets use TPE foaming for a head-fitting and breathable feel. The foaming ratio directly determines the cushioning thickness and weight, and should be set according to the helmet type.
The aging curve of the lining is tested by comparing the compression deformation at 70°C × 22 hours and the three-year retained sample. Just because the new material's cushioning is good does not mean it will still hold up after three years. The certification number is verified according to national and European standards.
Impact cushioning and breathability are tested separately, and the certification report follows each batch.
The helmet series is fed according to its use, and cushioning and ventilation are monitored together over a three-year lifespan. Samples from each batch are kept to test cushioning and ventilation, and the data from new materials must be compared with samples kept after three years.
I only dare to sign long-term orders when the aging curve is gradual.
For cushioning components, don't just test new materials; the three-year aging curves should be archived for comparison. Competition helmets use EPP, cycling helmets use TPE foaming based on helmet type, and cushioning impact and ventilation are tested separately.
The certification number is verified according to national and European standards, and samples from each batch are kept with cushioning and ventilation.
Cologne Customer Case: Tight delivery schedule with mismatched stock, formula readjustment to re-certify
A sports equipment factory in Quanzhou had tight delivery deadlines for helmet liners, but the performance of the available grades did not match. Cologne assisted in readjusting the formulation (oil/additives/filler ratios), got third-party testing done, and completed the certifications, delivering on schedule. After the formulation was readjusted, the performance matched and the certifications were complete—when delivery deadlines are tight, it relies on having a prepared plan.
Summary
For the selection of helmet liners, check for aging first, then test cushioning; where the lifespan is short, the aging curve will show it. The aging curve is the lifespan chart.
