工业护套晒半年就发脆开裂，线露在外头。工业护套耐温和透光没选对，护线就是裸线。
晒半年就发脆，线露在外头
工业护套是“护线防尘的件”：耐温、透光、柔韧。材料要耐温、透光、柔韧——结论先给：工业护套用 SEBS 基 TPE 是主流；高温护套，TPV 优先。
工业护套最大的坑：透光率差10%，档次差一截。透光率差10%，外观差一截——透光，是护套的档次线。
工业护套是功能件：开裂、发黄都是问题。材料选对，线缆才稳——功能件，别省料钱。
工业护套为什么用 TPE
工业护套用 TPE 的理由：耐温可做、透光可做、柔韧可做、效率高——四条合起来，适合护套。
耐温是核心：环境温度。耐温测试写进验收——变形，就是问题。
透光不能省：外观档次。透光测试写进验收——档次低，就是问题。
护线温度外观，三道关
护线工况：保护线缆。柔韧数据要验——开裂，就是问题。
温度工况：环境温度。耐温数据要验——变形，就是问题。
外观工况：透光档次。透光数据要验——档次低，就是问题。
SEBS 基还是 TPV？护套一表
| 维度 | SEBS 基 | TPV |
|---|
| 耐温 | 可做 | 好 |
| 透光 | 好 | 中 |
| 柔韧 | 好 | 好 |
| 成本 | 中 | 中高 |
| 耐介质 | 中 | 好 |
| 用途 | 常规 | 高温 |
表格读法：TPV 耐温耐介质好但贵；SEBS 基透光好——常规护套 SEBS 基，高温 TPV。
按温度选：高温 TPV，常规 SEBS 基。
护套验收：透光差一截档次差
| 透光率 | 外观 | 判断 |
|---|
| 90% | 透亮 | 合格 |
| 85% | 中 | 关注 |
| 80% | 雾 | 警惕 |
| 75% | 浊 | 换料 |
表格读法：透光一档档测，档次看得见——透光不均、发黄，护套外观档次直接掉。
透光，是护套的档次线。
只看价，三个坑透光漏
坑一：只看价。透光差一截，透明护套雾蒙蒙——透光必测。
坑二：耐温漏测。变形——耐温测试，必测。
坑三：柔韧虚标。开裂——柔韧按实测验收。
选工业护套先核透光
三问：耐温多少度、透光率多少、柔韧按什么标准。一验：实际工况实测——三问一验，供应商底细清楚。
透光验证要先行：把透光率和雾度一起测。先测透光，再谈价格——透光，是护套的档次线。
留样要成习惯：每批留样，耐温透光按批次复测。批次换料先对比再放量——批次稳，客诉少。
工业护套：出问题别乱拆，先看这张表
| 现象 | 原因 | 对策 |
|---|
| 开裂 | 柔韧不足 | 换高柔韧料 |
| 变形 | 耐温不足 | 换耐温料 |
| 档次低 | 透光差 | 换高透光料 |
| 发黄 | 耐黄变弱 | 换耐黄变料 |
| 批次漂移 | 配方波动 | 锁窗口 |
护套主流 SEBS基 TPE，Shore A 70-85，透光率差10%档次差一截。 透明护套看基材纯度，透光数据按批次测——外观档次靠纯料。
SEBS柔韧透光室内用，TPV耐温扛高温护线。 室温护套SEBS，高温走线TPV——按线温选体系。
护套发黄耐候差，先查UV助剂体系，别怪基材。 透光发黄是耐候剂没配够，先核助剂再换料。
护套验收：壁厚均匀、线径配合、耐油浸泡三件套。 内径按线径核，出口环保按批次核报告。
跟产调参把溶胀消除、一次过1000h老化，护套批量不再变形。 每批留样测透光加耐油，批次换料先对比再放量。
护套按线温选，室温 SEBS、高温走线 TPV。 SEBS 柔韧透光室内用，TPV 耐温扛高温护线，护套发黄先查 UV 助剂体系别怪基材，透光发黄是耐候剂没配够。
壁厚均匀和线径配合三件套一起验。 内径按线径核，出口环保按批次核报告，耐油浸泡做溶胀试，每批留样测透光加耐油。
内径按线径核，出口环保按批次核报告。 每批留样测透光加耐油，护套发黄先查UV助剂体系，透光发黄是耐候剂没配够。
护套发黄先查UV助剂，别怪基材。 室温SEBS高温走线TPV按线温选，壁厚均匀线径配合三件套，内径按线径核，每批留样透光加耐油。
护套每批留样测透光加耐油，出口环保按批次核报告。 发黄不是基材问题是耐候剂没配够，内径按线径核，溶胀测试做过再谈换料。
科隆客户案例：耐油不足溶胀变形，跟产过1000h老化
宁波一家工业设备厂，工业护套耐油性不足，泡油后溶胀变形。科隆配合现场跟产调试到良率稳定，溶胀消除，一次性通过 1000h 老化测试。跟产调试，把溶胀锁死在量产前——耐油问题，先看配方再看参数。
小结
工业护套的选型，透光先测，耐温再验，透光率差10%档次差一截，透光是档次线。
最麻烦的询盘是这一句：料没变，件出问题了。
料确实没变，变的是批次、湿度、模具磨损、机台，或者为了省钱动的某一项。参数是慢慢飘的，问题是一夜之间出来的。
宁波市科隆新材料有限公司，做改性热塑性弹性体、改性尼龙（PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T 及尼龙合金）、改性 PPO / PPS，以及各大化工巨头尼龙树脂、副牌料、大包料现货。
- 批次：第 14 批｜TI18
- 主关键词：工业护套；次关键词：工业护套TPE、护套耐温、护套透光、护套材料
- 摘要：工业护套用什么TPE？透光率差10%，档次差一截。耐温、透光、选型三张表一次讲清。
- 更新时间：待定
Industrial sheaths become brittle and crack after being exposed to the sun for half a year, leaving the wires exposed. The industrial sheaths' temperature resistance and light transmission were not chosen correctly, so the wire protection is just bare wire.
After being dried in the sun for half a year, it becomes brittle, with the wires exposed outside.
Industrial sheaths are 'components for protecting wires and preventing dust': temperature-resistant, light-transmitting, flexible. The materials should be temperature-resistant, light-transmitting, and flexible — conclusion first: SEBS-based TPE is mainstream for industrial sheaths; for high-temperature sheaths, TPV is preferred.
The biggest pitfall of industrial sheathing: a 10% difference in light transmittance results in a significant difference in grade. A 10% difference in light transmittance leads to a noticeable difference in appearance—light transmittance is the grade line of the sheath.
Industrial sheaths are functional parts: cracking and yellowing are problems. Only with the right material will the cable be stable—functional parts are not the place to save on material costs.
Why use TPE for industrial jackets
Reasons for using TPE for industrial sheathing: can withstand high temperatures, can be made transparent, can be made flexible, high efficiency—together, these four make it suitable for sheathing.
Temperature resistance is key: ambient temperature. Temperature resistance testing should be included in the acceptance criteria—deformation equals a problem.
Translucency cannot be compromised: appearance grade. Include the translucency test in the inspection—if the grade is low, it’s a problem.
Appearance of wire protection temperature, three checkpoints
Cable protection operation: protect the cables. Flexibility data must be tested—cracking indicates a problem.
Temperature working condition: ambient temperature. Temperature resistance data must be tested — deformation is the problem.
Appearance condition: light transmittance grade. The light transmittance data must be checked—if the grade is low, it is a problem.
SEBS base or TPV? Sheath at a glance
| Dimension | SEBS base | TPV |
|---|
| Temperature resistant | Can do | Good |
| Translucent | Good | middle |
| Flexible | Good | Good |
| Cost | middle | Medium-high |
| Media-resistant | middle | Good |
| Purpose | Regular | High temperature |
Table reading: TPV has good temperature and media resistance but is expensive; SEBS has good light transmission — conventional sheath uses SEBS base, high temperature uses TPV.
Select by temperature: high-temperature TPV, conventional SEBS-based.
Sheath inspection: poor light transmission indicates lower quality
| Light Transmittance | Appearance | Judgment |
|---|
| 90% | Transparency | Qualified |
| 85% | Medium | Focus |
| 80% | Fog | Vigilant |
| 75% | Cloudy | Material Change |
Table Reading: Measure light transmission at level 1, grade visible—uneven light transmission and yellowing will directly lower the sheath's appearance.
Light transmission is the grade line for the sheath.
Only look at price, three pits for light leakage
Pit 1: Only look at the price. Light transmission is a notch worse, transparent sheath is misty—light transmission must be tested.
Pit 2: Temperature resistance missed test. Deformation—temperature resistance test, mandatory.
Pit 3: False label for flexibility. Cracking—Flexibility accepted according to actual test.
When choosing industrial sheaths, check for light transmission
Three questions: What temperature resistance is this, what is the light transmittance rate, what standards for flexibility should be met. First inspection: Actual working condition test — Three questions and one inspection, supplier details are clear.
Light transmission verification must come first: measure light transmittance and haze together. Test light transmission first, then discuss price—light transmission is the quality line of the sheath.
Make it a habit to retain samples: keep samples for each batch, retest temperature resistance and light transmission by batch. Compare batch material changes before scaling up — stable batches, few customer complaints.
Industrial Sheath: If there is a problem, don't disassemble it randomly. First, check this chart
| Phenomenon | Cause | Countermeasures |
|---|
| Cracking | Insufficient Flexibility | Replace with Higher Flexible Material |
| Deformation | Insufficient Temperature Resistance | Change to heat-resistant material |
| Low grade | Poor light transmission | Switch to high light-transmitting material |
| Yellowing | Yellowing weakened | Switch to yellow-resistant material |
| Batch drift | Formula fluctuation | Window lock |
Mainstream SEBS base TPE, Shore A 70-85, light transmittance difference 10%, grade gap. Transparent sheaths are judged by the purity of the substrate, and light transmittance data is measured by batch—the appearance grade depends on pure materials
SEBS flexible, translucent indoor use, TPV heat-resistant and high-temperature wire protection. Room temperature sheath SEBS, high-temperature wiring TPV—select system by line temperature.
Sheath yellowing and poor weather resistance, first check UV additive system, don't blame the base material. Light-transmitting yellowing means not enough weathering agent is prepared; first test additives before changing materials.
Sheath acceptance: wall thickness uniform, wire diameter matched, oil-resistant soaking three-piece set. Inner diameter is measured by wire diameter, export environmental protection is reported by batch.
Monitor production and adjustment to eliminate swelling, aging for 1000 hours in one go, sheath batch no longer deformation. Each batch retains samples to test light transmission and oil resistance; batch material changes are compared before scaling up.
Sheath should be selected by wire temperature, room temperature SEBS, high-temperature trace TPV. SEBS is flexible and translucent for indoor use, TPV is heat-resistant and protects high-temperature wires. For sheath yellowing, check the UV additive system first and don't blame the substrate; yellowing is due to insufficient weathering agents.
Wall thickness uniformity and wire diameter are tested together as a three-piece set. Inner diameter is checked by wire diameter, export environmental protection is reported by batch, oil resistance soaking test is done for swelling test, and each batch retained sample tests for light transmission and oil resistance.
Inner diameter is tested by wire diameter; export environmental protection tests by batch for batch reporting. Each batch of samples is tested for light transmission plus oil resistance; if the sheath yellows, first check the UV additive system; yellowing is due to insufficient weathering agents.
For sheath yellowing, first check UV additives; don't blame the substrate. Room temperature SEBS high-temperature routing TPV should be selected according to line temperature, wall thickness uniform wire diameter with three-piece set, inner diameter according to wire diameter core, each batch retained for light transmission and oil resistance.
Sheath samples per batch for light transmittance and oil resistance, export environmental protection reported by batch. Yellowing is not a substrate issue; insufficient weathering agent is used. Inner diameter is measured by wire diameter; after swelling testing, material replacement is discussed.
Columbus customer case: insufficient oil resistance swelling and deformation, after 1000 hours of aging
an industrial equipment factory in Ningbo, industrial sheath has insufficient oil resistance and swelling and deformation after oil soaking. Cologne cooperated with on-site production debugging until yield stabilized and swelling was eliminated, passing the 1000h aging test in one go. Production debugging locked in before mass production—oil resistance issues, first look at the formula, then the parameters.
Summary
Selection of industrial sheaths: light transmittance tested first, temperature resistance then tested; a 10% difference in light transmittance means a notch of grade; light transmission is the grade line.
The most troublesome inquiry was: the material hasn't changed, but the parts have issues.
The material really hasn't changed; what has changed are batch, humidity, mold wear, machine, or some item changed to save money. Parameters fluctuate slowly, problems arise overnight.
Ningbo Kelong New Materials Co., Ltd. produces modified thermoplastic elastomers, modified nylon (PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T and nylon alloys), modified PPO / PPS, as well as nylon resins, sub-brand materials, and large packages from major chemical giants in stock
- Batch: Batch 14｜TI18
- Main keywords: Industrial sheath; Secondary keywords: Industrial sheath TPE, sheath temperature resistance, sheath light transmittance, sheath materials
- Summary: What TPE is used for industrial sheaths? A 10% difference in light transmittance can make a big difference in quality. Temperature resistance, light transmittance, and selection tables explained all at once.
- Update time: To be determined
