充电线折半年外被就裂，铜线露出来谁敢插。充电线护套耐候和柔韧没选对，线用一季就废。
折半年外被就裂，铜线露着谁敢插
充电线护套是“弯折日晒的件”：耐候、柔韧、耐磨。材料要耐候、柔韧、耐磨——结论先给：充电线护套用 SEBS 基 TPE 是主流；高温充电，TPEE 优先。
充电线护套最大的坑：护套料，先过耐候关。耐候不过，护套就废——耐候，是护套的门槛。
充电线护套是功能件：发黄、开裂都是问题。材料选对，线缆才稳——功能件，别省料钱。
充电线护套为什么用 TPE
充电线护套用 TPE 的理由：耐候可做、柔韧可做、耐磨可做、效率高——四条合起来，适合护套。
耐候是核心：日晒老化。耐候测试写进验收——发黄，就是问题。
柔韧不能省：反复弯折。弯折测试写进验收——开裂，就是问题。
弯折日晒拉扯，三道关
弯折工况：反复弯折。柔韧数据要验——开裂，就是问题。
日晒工况：日晒老化。耐候数据要验——发黄，就是问题。
拉扯工况：拉扯使用。强度数据要验——拉断，就是问题。
SEBS 基还是 TPEE？护套一表
| 维度 | SEBS基TPE | TPEE |
|---|
| 耐候 | 可做 | 好 |
| 柔韧 | 好 | 好 |
| 耐磨 | 可做 | 强 |
| 成本 | 中 | 中高 |
| 耐温 | 可做 | 高 |
| 用途 | 常规 | 高温 |
表格读法：TPEE 耐候耐温好但贵；SEBS 基性价比高——常规充电线 SEBS 基，高温 TPEE。
按温度选：高温 TPEE，常规 SEBS 基。
充电线验收：先过耐候这关
| 时间 | 状态 | 判断 |
|---|
| 500h | 微黄 | 合格 |
| 1000h | 浅黄 | 关注 |
| 1500h | 黄 | 警惕 |
| 2000h | 开裂 | 换料 |
表格读法：UV老化、热氧老化逐档过，露天用的护套最见真章——暴晒半年不裂不粘，才算站住。
耐候，是护套的门槛。
只看颜色，三个坑柔韧漏
坑一：只看颜色。新线黑亮挺括，晒一季就发粘开裂——颜色管新不管旧，耐候才管户外。
坑二：柔韧漏测。开裂——弯折测试，必测。
坑三：耐候虚标。发黄——耐候按实测验收。
选充电线护套先查耐候
三问：耐候按多少小时、弯折按多少次、温度多少。一验：实际使用实测——三问一验，供应商底细清楚。
耐候验证要先行：按使用地点定老化时长，户外件把UV剂量加上去。先测耐候，再谈价格——耐候，是护套的门槛。
留样要成习惯：每批留样，耐候柔韧按批次复测。批次换料先对比再放量——批次稳，客诉少。
充电线护套：现象原因对策，一张表收
| 现象 | 原因 | 对策 |
|---|
| 发黄 | 耐候不足 | 换耐候料 |
| 开裂 | 柔韧不足 | 换高柔韧料 |
| 拉断 | 强度不足 | 换高强度料 |
| 发粘 | 助剂迁移 | 换低析出料 |
| 批次漂移 | 配方波动 | 锁窗口 |
充电线护套主流 Shore A 85-95，弯着不塌、拉着不抻。 太软插头处易堆胶、太硬冬天发脆，这档天天绕包里不打结。
线冬天一弯就发白、一折就裂，不是料突然变脆，是低温韧性没配够。 按使用地区最低温做低温弯折，耐寒靠基材加增韧体系两头做。
护套验收按弯折加拉扯两轴：弯折看开裂次数，拉扯看断裂强度。 弯曲半径别小于线径 4 倍，绕折一万次不发白才进量产。
PVC 线皮便宜但冬天硬、有增塑剂，TPE 线皮低温柔软、无邻苯。 充电线天天搓绕，手感和耐低温算一本账，TPE 更经用。
换耐低温 SEBS 基护套，-20℃ 弯折不发白、绕折一万次不开裂。 冬天退货“线硬折裂”的工单当月清零。
充电线护套天天折，Shore A 85-95 的 TPE 才耐弯折，太软弯两下就发白、太硬冬天不跟手。 线径小、转弯多，弯曲半径小于线径 4 倍耐折必挂；
选 SEBS 基耐折配方，弯折上万次不开裂、表面不发白，插头根部加厚做软段过渡，插着不发硬。
线材护套验收看两头：根部耐折、表面低析出不粘手。 充电线冬天摸久了发黏，是低分子组分往表面跑；
每批测弯折寿命和表面手感，开线口做应力释放，反复弯折不白不裂再出货，批次换料先小批绕线对比。
充电线护套收尾验收：弯折寿命、表面析出、根部应力三项随批走。 每批留样测弯折上万次和表面手感，冬天不发黏、根部不开裂；
批次换料先绕线对比，不白不黏再出货。
科隆客户案例：低温开裂整批报废，留样数据合格率98%
温州一家线缆厂，充电线护套低温下一批开裂，整批报废。科隆配合提供同批次留样与物性数据，低温韧性恢复，批次合格率稳定在 98% 以上。留样加数据，低温关一次过——低温开裂，先看增韧体系。
小结
充电线护套的选型，耐候先测，柔韧再验，护套料先过耐候关，耐候是门槛。
The charging cable cracked half a year after being used, and the copper wire was exposed—who would dare to plug it in? If the charging cable's sheath doesn't have the right weather resistance and flexibility, the cable will be ruined after just one season.
After being folded for half a year, it cracked; who would dare to plug in exposed copper wires?
The charging cable sheath is a 'part exposed to bending and sunlight': weather-resistant, flexible, and wear-resistant. The material needs to be weather-resistant, flexible, and wear-resistant — conclusion first: SEBS-based TPE is mainstream for charging cable sheaths; for high-temperature charging, TPEE is preferred.
The biggest trap for charging cable jackets: the jacket material must first pass the weather resistance test. If it fails the weather resistance, the jacket is useless—the weather resistance is the threshold for the jacket.
The charging cable sheath is a functional component: yellowing and cracking are both issues. Only with the right material choice will the cable be stable—functional components, don't skimp on materials.
Why is TPE used for charging cable sheaths?
Reasons for using TPE for charging cable sheaths: weather resistance - check, flexibility - check, wear resistance - check, high efficiency - check. Altogether, it is suitable for sheaths.
Weather resistance is key: sun aging. Weather resistance testing is written into the acceptance criteria—yellowing is a problem.
Flexibility cannot be skipped: repeatedly bend. Include bending tests in the acceptance—if it cracks, it’s a problem.
Bending, sun exposure, pulling, three passes
Bending conditions: repeated bending. Flexibility data must be tested—cracking indicates a problem.
Sun exposure condition: sun aging. Weather resistance data must be tested—yellowing indicates a problem.
Tensile condition: used for pulling. Strength data must be tested—to the point of breaking, that's the issue.
SEBS base or TPEE? Sheath comparison table
| Dimension | SEBS-based TPE | TPEE |
|---|
| weather-resistant | Can do | Good |
| Flexible | Good | Good |
| Wear-resistant | Can do | Strong |
| Cost | middle | Medium-high |
| Temperature resistant | Can be done | Tall |
| Purpose | Regular | High temperature |
Table reading: TPEE has good weather and temperature resistance but is expensive; SEBS has a high cost-performance ratio — regular charging cables are SEBS-based, high-temperature ones are TPEE.
Choose by temperature: high-temperature TPEE, regular SEBS base.
Charging Cable Inspection: First Pass the Weather Resistance Test
| Time | State | Judgment |
|---|
| 500h | Slightly yellow | Qualified |
| 1000h | Light yellow | Follow |
| 1500 hours | Yellow | Be alert |
| 2000h | Cracking | Material change |
Table reading method: UV aging and thermal-oxidative aging should be tested step by step. The real test comes with cable sheaths used outdoors—only after six months of exposure to the sun without cracking or sticking can they be considered reliable.
Weather resistance is the threshold of the sheath.
Just looking at the color, the three holes are soft and leaky
Pitfall 1: Only looking at the color. The new wires are black, shiny, and stiff, but after being exposed to the sun for a season, they become sticky and crack — color matters for newness, not for durability; weather resistance is what matters for outdoor use.
Pitfall 2: Flexibility overlooked. Cracking—bend test is a must.
Pitfall 3: False weather resistance labeling. Yellowing — weather resistance should be accepted based on actual test results.
When choosing a charging cable sheath, first check its weather resistance.
Three questions: How many hours for weather resistance, how many times for bending, what temperature. One verification: actual measurement in use—three questions and one verification make the supplier's details clear.
Weather resistance verification must come first: determine the aging duration according to the usage location, and for outdoor parts, add the UV dosage. Test weather resistance first, then discuss the price — weather resistance is the threshold for the sheath.
Making sample retention a habit: retain samples for each batch and retest weather resistance and flexibility by batch. When changing materials between batches, compare first before scaling up — stable batches lead to fewer customer complaints.
Charging Cable Sheath: Causes, Symptoms, and Countermeasures, All in One Table
| Phenomenon | Reason | Countermeasure |
|---|
| Yellowed | Insufficient weather resistance | Replace with weather-resistant material |
| Cracking | Insufficient flexibility | Switch to high-flexibility material |
| tear off | Insufficient strength | Switch to high-strength material |
| sticky | Additive migration | Change to low precipitation material |
| Batch Drift | Formula fluctuation | Lock window |
The mainstream Shore A of charging cable sheaths is 85-95; it doesn’t collapse when bent and doesn’t stretch when pulled. If it’s too soft, the plug area tends to accumulate excess material; if too hard, it becomes brittle in winter. This range can be coiled in a bag every day without tangling.
In winter, the wire turns white when bent and cracks when folded. It's not that the material suddenly became brittle; it's because the low-temperature toughness is insufficient. The low-temperature bending should be tested according to the minimum temperature of the area where it will be used, and the cold resistance relies on both the base material and the toughening system.
The sheath acceptance is based on bending and pulling along two axes: bending checks the number of cracks, and pulling checks the breaking strength. The bending radius should not be less than 4 times the wire diameter, and it can only go into mass production if it does not turn white after ten thousand bends.
PVC wire sheaths are cheap but become hard in winter and contain plasticizers, while TPE wire sheaths are soft at low temperatures and free of phthalates. Charging cables are twisted and bent every day, so hand feel and low-temperature durability are important; TPE lasts longer.
Switch to wear-resistant, low-temperature SEBS-based jacket, which does not turn white when bent at -20℃ and does not crack after being bent ten thousand times. Return orders for 'hard wire breakage' in winter will be cleared within the same month.
The charging cable sheath is bent every day. Only TPE with Shore A 85-95 can withstand bending. If it's too soft, it turns white after bending a couple of times; if it's too hard, it doesn't flex well in winter. With a small wire diameter and many bends, a bending radius less than four times the wire diameter will inevitably cause breakage.
Choose an SEBS-based flexible formula, which can withstand tens of thousands of bends without cracking or whitening on the surface. The base of the plug is thickened to create a soft transition, so it doesn't feel stiff when plugged in.
The inspection of wire sheaths looks at both ends: the base should be resistant to bending, and the surface should have low exudation and not be sticky to the touch. When a charging cable feels sticky after being touched for a long time in winter, it is because low-molecular components migrate to the surface.
Each batch is tested for bending life and surface feel, stress relief is done at the wire opening, and repeated bending without whitening or cracking is required before shipment. When changing materials for a batch, a small batch of winding is compared first.
Charging cable sheath final inspection: Bending life, surface deposition, and root stress are checked for each batch. Samples from each batch are tested for tens of thousands of bends and surface feel; in winter, they should not become sticky, and the root should not crack.
For batch material changes, first compare by winding; only ship if it is not white and not sticky.
Cologne Customer Case: Entire Batch Scrapped Due to Low-Temperature Cracking, Sample Data Pass Rate 98%
A cable factory in Wenzhou experienced cracking of a batch of charging cable sheaths at low temperatures, and the entire batch was scrapped. Cologne cooperated by providing samples and physical property data from the same batch, restoring low-temperature toughness, and the batch pass rate stabilized above 98%. With samples and data, passing the low-temperature test is straightforward—when low-temperature cracking occurs, first check the toughening system.
Summary
For the selection of charging cable sheaths, test for weather resistance first, then verify flexibility. The sheath material should pass the weather resistance test first, as weather resistance is the threshold.
