缓冲块撞几次就发白开裂，缓冲回弹全没。缓冲块耐候没选对，撞一次就散架。
撞几次就发白开裂，回弹全没
缓冲块是“缓冲回弹的件”：回弹、耐候、耐压。材料要回弹好、耐候、耐压——结论先给：缓冲块用 SEBS 基 TPE 是主流；室外缓冲，TPV 优先。
缓冲块最大的坑：发白不用慌，先问存放条件。发白先问存放，别急着换料——存放条件，是发白的办案线索。
缓冲块是功能件：开裂、塌陷都是问题。材料选对，设备才稳——功能件，别省料钱。
缓冲块为什么用 TPE
缓冲块用 TPE 的理由：回弹可做、耐候可做、耐压可做、效率高——四条合起来，适合缓冲块。
回弹是核心：缓冲回弹。回弹测试写进验收——塌陷，就是问题。
耐候不能省：室外使用。耐候测试写进验收——开裂，就是问题。
缓冲回弹室外，三道关
缓冲工况：冲击缓冲。缓冲数据要验——震感，就是问题。
回弹工况：反复压缩。回弹数据要验——塌陷，就是问题。
室外工况：日晒雨淋。耐候数据要验——开裂，就是问题。
TPE 还是橡胶？缓冲块一表
| 维度 | TPE | 橡胶 |
|---|
| 回弹 | 可做 | 好 |
| 耐候 | 可做 | 好 |
| 耐压 | 可做 | 好 |
| 成本 | 中 | 中高 |
| 效率 | 注塑 | 硫化 |
| 回收 | 可回收 | 难 |
表格读法：橡胶回弹耐候好但贵；TPE 效率高、可回收——缓冲块，TPE 是主流。
按环境选：室外 TPV，室内 TPE。
缓冲块验收：发白先问存放
| 现象 | 原因 | 对策 |
|---|
| 存放发白 | 析出 | 换低析出料 |
| 日晒发白 | 老化 | 换耐候料 |
| 弯曲发白 | 应力发白 | 调配方 |
| 遇水发白 | 吸水 | 换耐水料 |
表格读法：发白先问存放条件，再按现象查——高温暴晒、密封袋闷放，油分析出就冒白霜。
存放条件，是发白的办案线索。
一发白就换料，三个坑
坑一：发白就换料。白霜十有八九是充油迁移，先别忙着换料——先问条件。
坑二：耐候漏测。开裂——耐候测试，必测。
坑三：回弹虚标。塌陷——回弹按实测验收。
选缓冲块料先查存放条件
三问：存放条件什么样、耐候按多少年、回弹按什么标准。一验：实际工况实测——三问一验，供应商底细清楚。
条件验证要先行：先把仓储温度、堆压、密封方式问一遍。先查条件，再谈价格——存放条件，是发白的办案线索。
留样要成习惯：每批留样，回弹耐候按批次复测。批次换料先对比再放量——批次稳，客诉少。
缓冲块：现象、原因、对策全在这
| 现象 | 原因 | 对策 |
|---|
| 塌陷 | 回弹不足 | 换高回弹料 |
| 开裂 | 耐候不足 | 换耐候料 |
| 发白 | 析出 | 换低析出料 |
| 震感 | 缓冲不足 | 加缓冲层 |
| 批次漂移 | 配方波动 | 锁窗口 |
缓冲块主流 SEBS基 TPE，Shore A 60-75，压缩量按间隙15%-25%定。 回弹靠交联不靠堆料，压变超30%的块，长期受压就塌。
SEBS软糯室内用，TPV耐候像橡胶走室外。 户外日晒选TPV，室内缓冲选SEBS——按有没有紫外线选体系。
缓冲块表面发白别急着换料，先问存放温度和充油量。 析出发白是充油往表面跑，先查充油量再查相容剂——白霜是油不是脏。
缓冲块验收：低温弯折、回弹率、耐候老化三关。 压缩量按实际间隙设计，低温发脆数据单独测——一项不过不放行。
按工况定制耐磨牌号、返工率降一半，缓冲块表面不再磨花。 每批留样测回弹加耐候，换牌号先小批试产再放量。
缓冲块表面发白是充油往表面跑，先查充油量再查相容剂。 SEBS 软糯室内用，TPV 耐候像橡胶走室外，白霜是油不是脏，存放温度单独问。
压缩量按实际间隙设计，低温发脆单独测。 回弹率和耐候老化三关一起过，按工况定耐磨牌号，每批留样测回弹加耐候。
存放温度单独问，白霜是油不是脏。 每批留样测回弹加耐候，压缩量按实际间隙设计，低温发脆按场地最低温核。
析出发白先查充油量，白霜是油不是脏。 室内SEBS室外TPV按紫外选，存放温度单独问，压缩量按实际间隙，低温发脆单独测，每批留样回弹加耐候。
科隆客户案例：耐磨不合格磨花快，定制牌号返工减半
武汉一家工业设备厂，缓冲块耐磨不合格，表面磨花快。科隆配合定制耐油/耐温专用牌号，耐磨提升，返工率降了一半。按工况定制，耐磨从配方提——耐磨问题，先看配方体系。
小结
缓冲块的选型，条件先查，回弹再测，发白不用慌先问存放条件，条件是线索。
The buffer block turns white and cracks after a few impacts, and the buffer rebound is completely gone. The buffer block's weather resistance was not chosen correctly, it falls apart after just one hit.
After a few hits, it turns white and cracks, with no rebound at all
A buffer block is a 'component that buffers and rebounds': it rebounds, is weather-resistant, and pressure-resistant. The material should rebound well, be weather-resistant, and pressure-resistant — conclusion first: SEBS-based TPE is mainstream for buffer blocks; for outdoor buffering, TPV is preferred.
The biggest pitfall with buffer blocks: don’t panic if they turn white; first, ask about the storage conditions. If they turn white, first ask about the storage, don’t rush to change the material — storage conditions are the clue to why they turned white.
The buffer block is a functional component: cracking and collapse are both problems. Only with the right material will the equipment be stable — for functional components, don’t skimp on material costs.
Why use TPE for the buffer block
Reasons for using TPE for buffer blocks: can provide rebound, can withstand weathering, can handle pressure, high efficiency — all four together make it suitable for buffer blocks.
Rebound is key: cushioning rebound. Rebound testing is included in acceptance—collapse is a problem.
Weather resistance cannot be compromised: for outdoor use. Weather resistance testing should be included in the acceptance—if it cracks, it’s a problem.
Outside the buffer rebound chamber, three checkpoints
Buffer operating condition: impact cushioning. Buffer data needs to be verified—vibration sensation, that's the issue.
Rebound condition: repeated compression. Rebound data must be verified—collapse indicates a problem.
Outdoor conditions: exposure to sun and rain. Weather resistance data must be tested—cracking is a problem.
TPE or rubber? A chart of buffer blocks
| Dimension | TPE | Rubber |
|---|
| rebound | Can be done | Good |
| weather-resistant | Can do | Good |
| Pressure-resistant | Can do | Good |
| Cost | middle | Medium-high |
| Efficiency | Injection molding | Vulcanization |
| Recycle | Recyclable | Difficult |
Table reading: Rubber has good rebound and weather resistance but is expensive; TPE is efficient and recyclable — for buffer blocks, TPE is mainstream.
Choose according to the environment: TPV for outdoor, TPE for indoor.
Buffer block acceptance: if it turns white, first check the storage
| Phenomenon | Reason | Countermeasure |
|---|
| Stored and discolored | Precipitation | Change to low precipitation material |
| Faded by the sun | Aging | Replace with weather-resistant material |
| Curved and pale | Stress whitening | Formulate a prescription |
| Turns white when wet | Absorb water | Change to waterproof material |
How to read the table: If it appears whitish, first ask about the storage conditions, then check according to the symptoms—exposed to high temperatures and sunlight, sealed in a bag for a while, the oil will produce white frost when analyzed.
Storage conditions are clues to cases that have gone cold.
Change the material as soon as it turns white, three pits
Pitfall 1: Change the material as soon as it turns white. White frost is most likely oil migration, so don't rush to change the material—check the conditions first.
Pitfall 2: Missed weather resistance testing. Cracking — weather resistance testing is a must.
Pitfall three: Overstated rebound. Subsidence — Rebound should be measured and accepted based on actual measurement.
When selecting buffer block material, first check the storage conditions
Three questions: What are the storage conditions, how many years is it weather-resistant, and what standard is used for rebound? One test: actual working conditions measurement—three questions and one test make the supplier's details clear.
Condition verification must come first: first ask about the storage temperature, stacking pressure, and sealing method. Check the conditions before discussing the price — storage conditions are the fading leads of a case.
Making sample retention a habit: retain samples for each batch, and retest rebound and weather resistance by batch. When changing materials for a batch, compare first before scaling up—the more stable the batch, the fewer the customer complaints.
Buffer Blocks: Phenomena, Causes, and Countermeasures All Here
| Phenomenon | Reason | Countermeasure |
|---|
| collapse | Insufficient rebound | Replace with high-resilience material |
| Cracking | Insufficient weather resistance | Replace with weather-resistant material |
| pale | Precipitate | Switch to low precipitation material |
| Vibration sense | Insufficient buffering | Add a buffer layer |
| Batch Drift | Formula fluctuation | Lock window |
Mainstream buffer block SEBS-based TPE, Shore A 60-75, compression amount determined by a gap of 15%-25%. Rebound relies on crosslinking rather than layering; blocks with a compression deformation over 30% will collapse under long-term pressure.
SEBS is soft and sticky, suitable for indoor use, while TPV is weather-resistant and rubber-like, suitable for outdoor use. For outdoor sun exposure, choose TPV; for indoor cushioning, choose SEBS — select the material system based on the presence of UV light.
Don't rush to change the material when the surface of the buffer block turns white; first check the storage temperature and oil filling level. The whitening is caused by the oil migrating to the surface; check the oil filling level first, then the compatibilizer — the white frost is oil, not dirt.
Buffer block acceptance: Three tests of low-temperature bending, rebound rate, and weathering aging. Compression amount is designed according to the actual gap, and low-temperature brittleness is measured separately—if any item fails, it will not be released.
Customize wear-resistant grades according to working conditions, halving the rework rate, and the surface of the buffer blocks is no longer scratched. Keep samples from each batch to test rebound and weather resistance, and when changing grades, first conduct a small batch trial production before scaling up.
The whitening on the surface of the buffer block is due to oil seeping to the surface; first check the oil fill level and then check the compatibilizer. SEBS is soft and sticky, suitable for indoor use, while TPV is weather-resistant like rubber and used outdoors. The white frost is oil, not dirt. Ask separately about the storage temperature.
The compression amount is designed according to the actual gap, and low-temperature brittleness is tested separately. The rebound rate and weathering aging are passed together in three tests, wear-resistant grades are determined according to operating conditions, and samples from each batch are retained to test rebound and weathering resistance.
Ask separately about the storage temperature. The white frost is oil, not dirt. Keep samples from each batch to test resilience and weather resistance. Design the compression according to the actual gap. For brittleness at low temperatures, base it on the lowest temperature at the site.
When whitening occurs during precipitation, first check the oil filling amount; the white frost is oil, not dirt. For indoor use, choose SEBS; for outdoor use, select TPV according to UV resistance. Ask separately about storage temperature, measure compression according to the actual gap, test brittleness at low temperatures separately, and for each batch, keep samples for rebound and weather resistance testing.
Cologne Customer Case: Wear resistance fails quickly, customized grades reduce rework by half
An industrial equipment factory in Wuhan had issues with buffer blocks being wear-resistant but failing quality standards, with surfaces wearing quickly. Cologne collaborated to customize special oil- and temperature-resistant grades, improving wear resistance and cutting the rework rate by half. Customized according to operating conditions, wear resistance is enhanced starting from the formula—when there is a wear resistance issue, first look at the formula system.
Summary
For selecting buffer blocks, first check the conditions, then test the rebound. Do not panic if they turn white; first ask about the storage conditions. Conditions are the clues.
