试产摔过了，量产两批货防摔差一截。防摔壳不连打三批，等于没试。
结论先摆：防摔壳，防摔批次绑一起
防摔壳是“宣传防摔的件”：标榜防摔，就要真防摔。材料要防摔好、批次稳、耐磨——结论先给：防摔壳用 TPU 是主流；软硬复合结构，TPE 加 TPU 复合优先。
防摔壳的最大坑：试产过了，量产还要看。试产样品好，量产批次飘——批次验证，就是台阶。
防摔壳是功能件：防摔是卖点，也是责任。材料选对，口碑才稳——功能件，别省料钱。
TPU凭啥稳：防摔强，批次还不飘
防摔壳用 TPU 的理由：防摔强、批次稳、耐磨、颜色可定制——四条合起来，适合防摔壳。
防摔是核心：四角缓冲。防摔测试（按高度）写进验收——防摔，就是命。
批次不能省：防摔等级随批次飘——三批数据，先查再下单。
三摔三温磨它：跌落、冬夏、磨损
跌落工况：不同高度跌落。防摔测试按高度分级验——四角裂，就是事故。
温度工况：冬天发脆。低温跌落测试（-20℃）——冬天场景，别漏。
磨损工况：天天磨。耐磨数据按实际使用验——磨亮，防摔就降。
TPU还是TPE：防摔壳上见高低
| 维度 | TPU | TPE |
|---|
| 防摔 | 强 | 中 |
| 低温 | 好 | 可做 |
| 耐磨 | 强 | 中 |
| 成本 | 中高 | 低 |
| 复合 | 好 | 好 |
| 批次 | 稳 | 稳 |
表格读法：TPU 防摔全面占优；TPE 便宜——主流防摔壳 TPU，复合结构 TPU+TPE。
按结构选：一体 TPU，复合软硬 TPU+TPE——结构不同，材料不同。
两个自欺：试产当量产、防摔造假
坑一：试产即量产。样品好不等于批次好，连打三批才见真章——批次稳，才敢放量。
坑二：防摔虚标。宣传防摔，实际四角裂——防摔按实测验收。
坑三：真假料混用。副牌料指标飘——真假辨别（批次、报告）不能省。
连打三批再放量：批次先锁
三问：防摔按什么高度、批次数据齐不齐、耐磨按什么方法。一验：连打三批实测——三问一验，供应商底细清楚。
批次验证要先行：连打三批，逐批对比。防摔等级、耐磨、外观一批一批摸——三批稳，才敢上量产。
留样要成习惯：每批留样，防摔耐磨按批次复测。批次换料先对比再放量——批次稳，客诉少。
试产过了不算过：连打三批说话
三批验证连打三批：防摔、耐磨、外观逐批测。批次硬度飘差超过±3A，手感就分层——三批稳，才敢上量产。
首批打基准：防摔等级、耐磨数据记基准。基准清楚，对比才有据——基准，就是起点。
第二批第三批对比：波动≤5% 才放行。波动超限，查根源——波动，就是警报。
三批数据存档：量产对比有据。数据存档，是批次管理的底账——存档，就是保险。
| 批次验证 | 项目 | 通过线 |
|---|
| 首批 | 基准数据 | 记基准 |
| 第二批 | 同上 | 波动≤5% |
| 第三批 | 同上 | 波动≤5% |
| 三批汇总 | 存档 | 连续稳定 |
表2读法：连打三批，逐批对比，任一批波动都要查原因。
| 材料指标 | 要求 | 说明 |
|---|
| 防摔 | 按高度 | 四角不裂 |
| 低温 | -20℃ 跌落 | 冬天不裂 |
| 耐磨 | 按使用 | 无磨亮 |
| 批次 | 三批稳定 | 量产保障 |
表3读法：四指标是防摔壳的体检表。一批好是运气，批批好才是材料。
防摔等级按高度写死，1 米、1.5 米分档验收。 冬天发脆，冻一晚再摔一次，低温抗冲是防摔壳的隐藏考点。
试产过了不代表量产稳，三批数据存档才上台阶。 首批打基准、第二批第三批对比，波动 ≤5% 才放行。
TPE 吸能好但偏软，TPU 硬挺但偏涩——同是防摔手感差一截。 按定位选，运动款 TPU、日常款 SEBS 基 TPE。
样壳装满沙袋摔三次看四角，冻一晚再补一摔。 冬夏两季都过，防摔数据随批走，摔裂一次宣传全打脸。
防摔壳是卖点也是责任，摔裂一次口碑就垮。 批次、低温、高度三关一起锁，批批好才是真材料。
防摔壳冬天要冻一晚再摔，低温发脆是隐形考点。 冻到零下再做跌落，脆裂一次宣传全打脸，运动款 SEBS 基偏软吸能更好。
科隆客户案例：异味被退货压仓，定制牌号良率98%
台州一家电子消费厂，防摔壳成品异味被下游退回，货压在仓库。科隆配合定制耐油/耐温专用牌号，异味消除，量产良率稳定在 98%。异味是配方问题，定制才根治——通用料扛不住，就定制。
小结
防摔壳的选型没有一步到位的魔法，但判据能让你少绕圈，功夫在选型之前。
总有人问：副牌料到底能不能用。
我们的回答一直没变——能用的地方很多，不能用的地方一处都不能碰。它和回料是两回事：一个是指标偏了，一个是分子链断了。
宁波市科隆新材料有限公司，主营改性热塑性弹性体、改性尼龙（PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T 及尼龙合金）、改性 PPO / PPS；各大化工巨头的尼龙树脂、副牌料、大包料现货。
- 批次：第 8 批｜TE2
- 主关键词：防摔壳材料；次关键词：手机防摔保护套、防摔壳材质、防摔壳TPE、防摔壳批次
- 摘要：防摔壳材质怎么选？试产过了，量产还要看。防摔、批次、耐磨三张表一次讲清。
- 更新时间：待定
The trial production failed the drop test, and the mass-produced batches were still somewhat lacking in drop resistance. Not testing the shockproof case across all three batches is equivalent to not testing at all.
Conclusion first: put the anti-drop cases and the anti-drop batches together
A shockproof case is a 'promoted shockproof item': if it advertises being shockproof, it must truly be shockproof. The materials should be good at resisting drops, have stable batches, and be wear-resistant — conclusion first: using TPU is mainstream for shockproof cases; for soft-hard composite structures, TPE combined with TPU is preferred.
The biggest pitfall of drop-proof cases: the trial production is done, but mass production is still uncertain. The trial production samples may be good, but the mass production batches can vary—batch verification is a crucial step.
A shockproof case is a functional item: being drop-resistant is both a selling point and a responsibility. Choosing the right material ensures a solid reputation—it's a functional item, so don't skimp on material costs.
Why TPU is stable: strong drop resistance, and batches are consistent
Reasons for using TPU for protective cases: strong drop resistance, stable batches, wear resistance, customizable colors—together, these four make it suitable for protective cases.
Drop protection is key: cushioning at all four corners. Drop test (by height) should be included in acceptance criteria—drop protection is a matter of life.
Batches cannot be skipped: Drop resistance level varies by batch — check three batches of data before placing an order.
Three falls, three temperatures, and rubbing it: dropping, winter and summer, wear
Drop conditions: dropping from different heights. Anti-drop tests are graded by height—cracks at the four corners are considered accidents.
Temperature conditions: brittle in winter. Low-temperature drop test (-20℃) — winter scenario, don't miss it.
Wear conditions: ground every day. Wear resistance data is verified according to actual use—polished, impact resistance decreases.
TPU or TPE: the differences show on drop-proof cases
| Dimension | TPU | TPE |
|---|
| Drop-resistant | Strong | middle |
| Low temperature | Good | Can be done |
| Wear-resistant | Strong | middle |
| Cost | Medium-high | Low |
| Compound | Good | Good |
| Batch | Stable | Stable |
Table reading: TPU is fully superior in drop resistance; TPE is cheap — mainstream drop-resistant cases use TPU, composite structures use TPU and TPE.
Select by structure: integrated TPU, composite soft and hard TPU TPE—the structure is different, and the materials are different.
Two self-deceptions: pilot production as mass production, fake anti-drop
Pitfall 1: Trial production is the same as mass production. Just because the sample is good doesn't mean the batch will be good. It takes three consecutive batches to see the real result—only when the batch is stable can you dare to ramp up production.
Pitfall 2: Misleading drop-resistance claims. Promoted as drop-resistant, but the corners actually crack—drop resistance should be verified by actual testing.
Pitfall Three: Mixing real and fake materials. The indicators of secondary brand materials fluctuate — the identification of authenticity (batch, report) cannot be skipped.
Strike three batches in a row before increasing volume: lock the batches first
Three questions: At what height should it be drop-tested, are the batch data complete, and what method should be used for abrasion resistance. One test: Conduct real measurements for three consecutive batches — three questions and one test, suppliers' details are clear.
Batch validation must come first: test three batches consecutively, comparing them batch by batch. Hand-check each batch for drop resistance, wear resistance, and appearance — only if all three batches are stable can mass production proceed.
Making sample retention a habit: retain samples for each batch and retest batch by batch for drop resistance and wear resistance. When changing materials for a batch, compare first before scaling up — stable batches lead to fewer customer complaints.
Trial production doesn't count as passing: talking about three consecutive batches
Three batches of validation repeatedly tested in three batches: each batch is measured for drop resistance, wear resistance, and appearance. If the hardness variation between batches exceeds ±3A, the feel becomes layered—only when three batches are stable do we dare to go into mass production.
First batch sets the benchmark: Anti-drop level and wear resistance data are recorded as the benchmark. With a clear benchmark, comparisons are supported—the benchmark is the starting point.
Comparison between the second batch and the third batch: release only if the fluctuation ≤5%. If the fluctuation exceeds the limit, investigate the source — fluctuation is an alert.
Three batches of data archived: evidence for mass production comparison. Data archiving is the fundamental record of batch management—archiving is insurance.
| Batch verification | Project | Through line |
|---|
| first batch | Benchmark data | Record benchmark |
| The second batch | Same as above | Fluctuation ≤5% |
| The third batch | Same as above | Fluctuation ≤5% |
| Three batches summary | Archive | Continuous and stable |
Table 2 reading method: Hit three batches consecutively, compare them batch by batch, and investigate the reason if there is fluctuation in any batch.
| Material specifications | Requirement | Explanation |
|---|
| Shockproof | By height | The four corners are intact |
| Low temperature | Fall at -20℃ | Does not crack in winter |
| Wear-resistant | According to usage | No polishing |
| Batch | Stable third batch | Mass production guarantee |
Table 3 reading: The four indicators are the physical inspection form for the shockproof case. Good batch is luck; batch quality is the material.
Drop resistance grades are fixed by height, 1 meter and 1.5 meter are graded for acceptance. Brittle in winter, drop again after freezing overnight; low-temperature impact resistance is a hidden test point for shockproof cases.
Passing trial production doesn't mean stable mass production; only after three batches of data are they higher. The first batch was benchmarked, the second and third batches compared, only allowed with a fluctuation of ≤5%.
TPE Good absorption but soft, TPU is stiff but a bit rough—both drop resistance feels a bit worse. Choose by position: sport TPU, daily SEBS base TPE.
Sample case filled with sandbags, drop three times to check the corners, freeze overnight and then reseal the drop. Lasts through both winter and summer, drop data is distributed with batch data, but once broken, the reputation is completely proven wrong.
Crash case is both a selling point and responsibility; cracking once can ruin reputation. Lock batch size, low temperature, and height all at once; only good batches are the real material.
Shockproof cases freeze overnight in winter before dropping; low temperature brittleness is a hidden test. Freezing to below zero before dropping, brittle cracks once and the marketing is completely proven wrong; the sporty SEBS base is softer and absorbs better.
Cologne customer case: odor returned and stored in storage, custom grade has a yield rate of 98%.
An electronics factory in Taizhou, finished shockproof case odor was returned downstream, and goods were stored in the warehouse. Cologne cooperated with custom oil- and temperature-resistant special grades, eliminating odors and stabilizing mass production yield at 98%. Odor is a formula issue; customization solves it — if generic materials can't handle it, then customize.
Summary
There is no one-step magic for choosing shockproof cases, but criteria can help you avoid detours; the effort is before selecting the model.
People always ask: Can sub-brand materials actually be used?
Our answer has never changed—there are many usable areas, but not a single place where we can't touch them. It's different from recycled materials: one is the misalignment, the other is the molecular chain break.
Ningbo Kelong New Materials Co., Ltd. mainly produces modified thermoplastic elastomers, modified nylon (PA6 / PA66 / PA46 / PA11 / PA12 / PA6T / PA9T and nylon alloys), modified PPO / PPS; Nylon resin, sub-brand materials, and bulk materials from major chemical giants in stock.
- Batch: 8th batch | TE2
- Main keywords: shockproof case material; Subkeywords: phone shockproof protective case, shockproof case material, TPE protective case, shockproof case batch
- Summary: How to choose the material of the shockproof case? Trial production has passed, but mass production still depends on the results. Drop protection, batch size, and wear resistance are explained all at once
- Update time: To be determined
