平板四角先磨穿，样品和量产两回事。平板保护套批次不锁，良率就是赌。
结论先摆：平板套，包边批次绑一起
平板保护套是“天天拿的件”：包边、防摔、耐磨。材料要包边牢、批次稳、耐磨——结论先给：平板保护套包边用 SEBS 基 TPE 是主流；耐磨要求高，TPU 或复合优先。
平板保护套最大的坑：样品过得去，量产两回事。样品好不代表批次好——批次验证，就是台阶。
平板保护套是功能件：四角磨穿，保护就没了。材料选对，保护才稳——功能件，别省料钱。
TPE凭啥包边：包胶成熟，耐磨可加
平板保护套用 TPE 的理由：包胶成熟、耐磨可做、效率高、成本可控——四条合起来，适合保护套。
包胶是核心：TPE 包 PC/ABS 骨架。剥离强度写进验收——脱层，就是死法。
批次不能省：样品好不代表批次好——三批数据，先查再下单。
摔一天磨它：跌落、桌面摩擦、夏热
跌落工况：天天摔。防摔测试（按高度）写进验收——四角裂，就是没保护。
摩擦工况：桌面磨、包内磨。耐磨数据要验——磨穿，保护就没了。
温度工况：夏天暴晒。耐热数据要验——变形，包边就翘。
SEBS还是TPU：保护套上看磨不穿
| 维度 | SEBS 基 | TPU |
|---|
| 包胶 | 成熟 | 成熟 |
| 耐磨 | 中 | 强 |
| 防摔 | 中 | 强 |
| 成本 | 低 | 中高 |
| 手感 | 软糯 | 略硬 |
| 批次 | 稳 | 稳 |
表格读法：TPU 耐磨防摔强但贵；SEBS 基便宜——普通款 SEBS 基，防摔款 TPU。
按定位选：轻薄款 SEBS 基，防摔款 TPU——定位不同，材料不同。
两个坑：样品当量产、批次漂移
坑一：样品即量产。样品精挑细选，量产批次波动——连打三批，才算数。
坑二：批次漂移。两批货颜色性能差一截——批次数据，先查再下单。
坑三：包胶脱层。用久四角翘边——剥离强度测试，写进验收。
批次上三步：小批、中批、放量
三问：防摔按什么高度、剥离强度多少、批次数据齐不齐。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。四角磨穿、边缘包边一批一批看——三批稳，才敢上量产。
留样要成习惯：每批留样，包胶耐磨按批次复测。批次换料先对比再放量——批次稳，客诉少。
四角先磨穿：耐磨先测
批次台阶三步上：样品、小批、量产。三步都稳，边角耐磨和剥离力才兜得住——三步都稳，才叫真稳。
样品定方向：样品打样验方向。方向对，才进小批——样品，就是验证。
小批定参数：小批试产锁参数。参数锁，量产才稳——小批，就是锁定。
量产定批次：量产连打三批。三批稳，才敢上量——量产，就是考场。
| 批次台阶 | 阶段 | 说明 |
|---|
| 样品 | 验方向 | 方向对 |
| 小批 | 锁参数 | 参数稳 |
| 量产三批 | 验批次 | 批次稳 |
| 数据存档 | 全程 | 有据可查 |
表2读法：批次三台阶，一步不能跳，跳一步量产就出事。
| 材料指标 | 要求 | 说明 |
|---|
| 包胶 | 剥离强度 | 不脱层 |
| 防摔 | 按高度 | 四角不裂 |
| 耐磨 | 按使用 | 无磨穿 |
| 批次 | 三批稳定 | 量产保障 |
表3读法：四指标是保护套的体检表。四角磨穿，保护就没了。
TPE 包 PC/ABS 骨架，剥离强度写进验收。 包边用指甲抠看脱不脱，四角摔三次看裂纹，脱层就是保护套的死法。
三关台阶一步不能跳，边角磨穿才兜得住。 样品定方向、小批锁参数、量产连打三批，三批稳才敢上量。
防摔按高度验收，四角是重点。 包里挤压、边缘落地，极限工况先模拟，四角磨穿保护就没了。
样套四角摔三次看裂纹，包边指甲抠看脱不脱——一摔一抠见真章。 日常挤压加落地，双工况过了才稳。
保护套是日常件，批次才是试金石。 防摔、剥离、批次三关一起锁，样品小批量产步步过。
保护套包 PC/ABS 骨架，90° 剥离按 ≥2N/cm 验收。 指甲抠不脱、四角摔三次无裂纹，脱层就是保护套的死法。
保护套防摔按高度分档，包里挤压边缘落地先模拟。 四角磨穿保护就没了，极限工况过了日常才稳。
科隆客户案例：成本超标报价没竞争力，定制牌号回预算
青岛一家电子消费厂，平板保护套材料成本超标，报价没竞争力。科隆配合定制耐油/耐温专用牌号，性能达标，成本回到预算线内。按工况定制，成本才压得下来——成本超标，先看体系选宽了没有。
小结
平板保护套的选型没有一步到位的魔法，但判据能让你少绕圈，批次稳才是硬道理。
有些生意我们不做。
不问用途就报价的，不做。
把副牌料说成正牌卖的，不做。
The four corners of the tablet are ground through first; samples and mass production are two different things. If the tablet cases are not locked by batch, the yield is just a gamble.
Conclusion first: tablet cases, batch of edges tied together
A tablet case is an 'everyday item': edge-wrapping, drop-proof, wear-resistant. The material should have secure edge-wrapping, stable batches, and wear resistance — conclusion first: for edge-wrapping, SEBS-based TPE is mainstream; for high wear resistance, TPU or composites are preferred.
The biggest pitfall of tablet cases: the sample is acceptable, but mass production is another matter. A good sample does not mean the batch will be good—batch verification is a process.
A tablet case is a functional item: if the four corners wear through, the protection is gone. Choosing the right material ensures stable protection—it's a functional item, don't skimp on materials.
Why TPE can be edge-wrapped: mature overmolding, wear-resistant and can be reinforced
Reasons for using TPE for tablet protective cases: mature coating, wear-resistant and feasible, high efficiency, controllable cost—together, these four make it suitable for protective cases.
Coating is key: TPE over PC/ABS skeleton. Peel strength is written into the acceptance—delamination is a fatal flaw.
You can't skip batches: a good sample doesn't mean the batch is good—check three batches of data before placing an order.
Throw it around all day: drops, rubbing on the table, summer heat
Drop conditions: Dropped every day. Drop test (by height) is written into the acceptance—cracks at the four corners, just no protection.
Friction conditions: tabletop grinding, internal grinding. Wear resistance data must be tested—once worn through, the protection is gone.
Temperature conditions: exposed to intense sunlight in summer. Heat resistance data must be tested—deformation, the edging will warp.
SEBS or TPU: It’s hard to wear through on the case
| Dimension | SEBS base | TPU |
|---|
| Encapsulation | Mature | Mature |
| Wear-resistant | middle | Strong |
| Drop-resistant | middle | Strong |
| Cost | Low | Medium-high |
| hand feel | soft and glutinous | Slightly hard |
| Batch | Stable | Stable |
Table reading: TPU is wear-resistant and drop-proof but expensive; SEBS-based is cheap — standard SEBS-based, TPU for drop-proof.
Choose according to positioning: slim SEBS base, drop-proof TPU – different positioning, different materials.
Two pitfalls: treating samples as mass production, batch-to-batch variation
Pitfall 1: Treating the sample as mass production. Samples are carefully selected, while mass production batches fluctuate — only after producing three consecutive batches does it count.
Pitfall 2: Batch drift. The color and performance of two batches of goods differ significantly — check batch data before placing an order.
Pitfall 3: Coating delamination. After long-term use, the four corners curl up—perform peel strength testing and include it in the acceptance criteria.
Three steps in batch ramp-up: small batch, medium batch, mass production
Three questions: what height should it withstand drops, what is the peel strength, and are the batch data complete. One test: actually test three batches in a row——three questions, one test, the supplier's background is clear.
Batch validation must be done first: hit three batches consecutively and compare them batch by batch. Check each batch for corners worn through and edge wrapping—only after three batches are stable will we dare to go to mass production.
Making sample retention a habit: retain samples for each batch, and re-test the coated wear-resistant material batch by batch. When changing material for a batch, compare first before scaling up—stable batches result in fewer customer complaints.
Grind the corners first: test wear resistance first
Three steps in batch ramp-up: sample, small batch, mass production. Only when all three steps are stable can the corners withstand wear and the peeling strength hold — stability in all three steps is what real stability means.
Sample orientation determination: Sample proofing to check orientation. Only if the orientation is correct will it proceed to a small batch—the sample is for verification.
Small batch parameter setting: small batch trial production locks parameters. Parameter lock, stable only in mass production——small batch means locking.
Mass production batched: mass production in three consecutive batches. Only if all three batches are stable can we dare to increase the volume—mass production is like an exam.
| Batch step | Stage | Explanation |
|---|
| Sample | Check direction | The direction is correct |
| small batch | Lock parameters | Parameters are stable |
| Mass-produce three batches | Batch inspection | Batch stable |
| Data Archive | the whole process | There is evidence to verify |
Table 2 reading: Batch three steps, you can't skip a step, skipping one step will cause production problems.
| Material specifications | Requirement | Explanation |
|---|
| Overmolding | Peel strength | Does not delaminate |
| Drop-resistant | By height | No cracking at the four corners |
| Wear-resistant | According to use | Unworn |
| Batch | Three Batches Stable | Mass production assurance |
Table 3 reading: The four indicators are the health check form of the condom. If the four corners are worn through, protection is gone.
TPE wraps PC/ABS frame, peel strength is recorded in the acceptance. Check the edging by prying with a fingernail to see if it comes off, drop each of the four corners three times to see if there are cracks; delamination is the death of the protective case.
You can't skip a step on the three-step platform; only by wearing down the corners can you control it. Determine the direction with a sample, lock the parameters with a small batch, and go through three batches in mass production; only when the three batches are stable can you dare to scale up.
Drop resistance is inspected based on height, with the four corners being the key points. Squeezing in the bag and landing on edges are simulated first under extreme conditions; once the four corners wear through, the protection is gone.
Test the sample by dropping it on all four corners three times to check for cracks, and pick at the edges with your fingernail to see if it comes off—only after repeated dropping and picking will the true quality be revealed. It only becomes stable after enduring daily squeezing and falling, passing both conditions.
Protective cases are an everyday item, but the batch is the touchstone. Drop resistance, peel strength, and batch consistency are locked together, and small batches of samples pass every step of production.
The protective case has a PC/ABS frame, with a 90° peel test requiring ≥2N/cm for acceptance. It should not come off when scratched with a fingernail, and after dropping on all four corners three times, there should be no cracks. Delamination is the fatal flaw for the protective case.
Protective cases are classified by height for drop resistance; first simulate edge impacts in the bag. Once the four corners wear through, protection is gone; extreme conditions are only stable after surpassing everyday use.
Cologne Customer Case: Cost exceeded, quotes not competitive, customized grade back within budget
An electronics consumer goods factory in Qingdao found that the material cost for tablet protective cases was over budget, and the quotation was not competitive. Cologne cooperated to customize a special grade resistant to oil and temperature, meeting performance standards and bringing the cost back within the budget. Customizing according to working conditions is the only way to bring costs down—if the cost is over budget, first check whether the system specification was chosen too broadly.
Summary
There is no magic to choosing a tablet case in one step, but criteria can help you take fewer detours; stable batches are the hard truth.
There are some businesses we don't do.
We do not provide quotes without knowing the purpose.
Selling secondary cloth as the main brand, not doing it.
