回料做的件一开箱就是味，车内熏得慌。气味等级差一级，口碑差一截。
一开盖就刺鼻，是回料气味没压住
TPE 回料再造粒，气味和性能都要核：气味、物性、掺混比。结论先给：回料味冲，车厢里先被客户退——气味，是回料的门槛。
TPE回料最大的坑：气味等级差一级，车内差一个口碑。气味差一级，口碑差一截——气味，是回料的等级线。
TPE 回料是成本关：省料要看场合。回料用对，成本才省——成本关，别省过头。
回料性能会打折，为什么先核比例
回料是再生料：分子链受损，性能打折。拉伸强度下降，回弹变差——性能，是回料的底线。
回料气味高风险：助剂残留、降解产物。气味测试写进验收——超等级，就是问题。
回料批次波动大：来源混杂，性能不稳。批次追溯，是回料的稳定器。
比例、用途、测试，掺混怎么定
比例：新料加回料，比例按件定。回料多了，性能降——比例，是回料的天平。
用途：回料用低要求件。内饰件慎用——用途，是回料的分级。
测试：掺混后全项测。物性达标才放量——测试，是回料的验收。
新料回料，一张表对照清楚
| 用途 | 掺混 | 测试 |
|---|
| 包边 | 30% | 常规 |
| 垫片 | 20% | 常规 |
| 内饰 | 0% | 严禁 |
| 玩具 | 0% | 严禁 |
表格读法：用途分等级，掺混按等级——内饰玩具，回料禁用。
按用途定，回料才不踩。
闻着不冲不辣眼，验收测这四项
| 等级 | 场景 | 判断 |
|---|
| 1级 | 内饰 | 达标 |
| 2级 | 通用 | 达标 |
| 3级 | 外饰 | 关注 |
| 4级 | 禁 | 换料 |
表格读法：气味等级按舱内法评，掺混比高了味就冲——车内件，气味评级差一档口碑就掉。
气味，是回料的等级线。
全用回料省成本，气味先翻车
坑一：全用回料。掺多了味道散不掉，开暖风就熏人——回料比例和脱挥要一起控。
坑二：性能不测。开裂——掺混后全项测。
坑三：来源不核。批次乱——批次追溯必做。
比例、气味、用途——掺混前问清
三问：什么来源、掺混多少、什么用途。一验：掺混后全项实测——三问一验，供应商底细清楚。
气味验证要先行：按舱内气味法评级，回料比例和脱挥工艺跟着调。先测气味，再谈回料——气味，是回料的等级线。
留样要成习惯：每批留样，性能按批次复测。批次换料先对比再放量——批次稳，客诉少。
刺鼻、发脆、变色：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 气味超 | 助剂残留 | 换来源 |
| 开裂 | 性能降 | 降掺混 |
| 色差 | 来源混杂 | 锁来源 |
| 发黄 | 降解 | 换新料 |
| 批次漂移 | 配方波动 | 锁窗口 |
回料能用，但不是随便用——分子链受损，回弹和拉伸都打折扣。 高要求件少用或不用；来源不明的回料不入厂，来源先登记。
掺混后必须全项复测，性能达标才放量。 拉伸、回弹、硬度对比新料，差距看得见；用量按用途分级，掺混比例记录可追溯。
回料管理三步：登记来源、定死掺混比、掺后全项复测。 储存防潮，吸潮影响性能；气味等级按应用核，车内件要求更高。
副牌料便宜三成，硬度漂移也大三成——省的钱正好够赔客诉。 回料同理；别只算单价，把报废率算进去才是真账。
分级使用后，非外观件掺回料成本降一成，性能全项达标。 每批留样对比；回料记录归档，批次追溯有据。
TPE 回料不是不能用，是比例和批次要锁死，乱掺就是硬度漂移的源头。
干净同体系回料掺 10%-20% 通常可控；来源杂、受污染的回料发黏析出，别进外观件和接触件，回料先过筛除杂。
用回料先小批试，测硬度、压变和外观再谈比例。
回料比例波动硬度就漂移，漂移超 ±3A 客户摸得出来；每批测熔融和硬度，接触食品医疗件原则上不用回料。
回料收尾验收：掺比锁定、硬度漂移、外观三项随批走。 干净同体系掺 10%-20%，每批测硬度漂移不超 ±3A；批次换料先小批试，接触件原则上不用回料。
科隆客户案例：回弹不足不达标，调参数过气味验收
无锡一家注塑加工厂，TPE 回料件回弹不足，功能件性能不达标。科隆配合调整注塑参数（模温/料温/保压），回弹恢复，气味等级通过客户验收标准。参数窗口锁死，回弹从源头稳——回弹问题，先看参数再看配方。
小结
TPE回料的选型，气味先测，性能再核，气味等级差一级车内差一个口碑，气味是等级线。
The parts made from recycled material emit a smell as soon as the box is opened, making the car interior very unpleasant. The odor level is one grade worse, and the reputation is significantly lower.
As soon as you open the lid, it smells pungent; it's the smell of recycled material not being suppressed.
TPE reprocessed material remelting, both odor and performance need to be checked: odor, physical properties, mixing ratio. Conclusion first: the reprocessed material has a strong smell, the vehicle cabin was first rejected by the customer—the odor is the threshold for reprocessed material.
The biggest pitfall of recycled TPE: one level difference in odor can lead to a one-step difference in the car's reputation. One level worse in odor, one step worse in reputation — odor is the grade line for recycled material.
Recycled TPE is a cost issue: saving material depends on the situation. Using recycled material correctly saves costs—it's about cost management, don't overdo it.
The performance of the recycled material will be reduced, so why first check the ratio?
Recycled material is reclaimed material: the molecular chains are damaged, and performance is compromised. Tensile strength decreases, rebound worsens — performance is the bottom line for recycled material.
High risk of recycled material odor: additive residues, degradation products. Include odor testing in acceptance—if it exceeds the standard, it's a problem.
Large fluctuations in recycled material batches: mixed sources, unstable performance. Batch traceability is the stabilizer for recycled material.
Ratio, usage, testing, how to determine blending
Ratio: New material added to recycled material, the ratio is determined per piece. If there is too much recycled material, performance decreases — the ratio is the balance for the recycled material.
Usage: Low-quality parts for recycled material. Use interior parts with caution — usage refers to the grading of recycled material.
Test: Full testing after mixing. Only when the physical properties meet the standards will quantity be released — testing is the inspection of returned material.
New material and recycled material, clearly compared in one table
| Purpose | blending | Test |
|---|
| Edging | 30% | Regular |
| Gasket | 20% | Regular |
| Interior | 0% | Strictly prohibited |
| Toy | 0% | Strictly prohibited |
Table reading: Uses are classified by grade, blending is according to grade — interior toys, recycled material is prohibited.
Sort by usage, and the recycled material won't go to waste.
It doesn't smell strong or irritate the eyes, check these four items for inspection
| Level | Scene | Judgment |
|---|
| Level 1 | Interior | Meet the standard |
| Level 2 | General | Meet the standard |
| Level 3 | Exterior trim | Follow |
| Level 4 | Forbidden | Material change |
Table reading: The odor level is assessed according to the cabin method; if the blending ratio is too high, the smell will be strong— for interior car parts, if the odor rating drops by one level, the reputation will fall.
Smell is the grade line of recycled material.
Using all recycled materials to save costs, the smell backfired first
Pitfall 1: Using all recycled material. If too much is mixed in, the smell won't dissipate, and turning on the heater makes it stifling — the ratio of recycled material and the removal of volatiles must be controlled together.
Pitfall 2: Performance is unpredictable. Cracking—test all items after mixing.
Pitfall 3: Sources not verified. Batch confusion — batch traceability must be implemented.
Proportion, smell, use—ask before mixing
Three questions: what is the source, how much is mixed, and what is the purpose. One test: after mixing, measure all items—three questions and one test make the supplier's details clear.
Odor verification must come first: Rate according to the cabin odor method, then adjust the proportion of recycled material and the degassing process accordingly. Measure the odor first, then discuss the recycled material — odor is the benchmark for the recycled material grade.
Make sample retention a habit: retain samples for each batch and retest performance batch by batch. When changing materials for a batch, compare first before scaling up—stable batches mean fewer customer complaints.
Pungent, Brittle, Discolored: A Fault Comparison Table
| Phenomenon | Reason | Countermeasure |
|---|
| The smell is amazing | Additive residue | Change source |
| Cracking | Performance degradation | Reduced blending |
| Color difference | Mixed sources | Lock source |
| Yellowed | Degradation | Change to new material |
| Batch Drift | Formula fluctuation | Lock window |
Recycled material can be used, but not casually — molecular chains are damaged, and both resilience and stretch are compromised. Use it sparingly or not at all for high-demand parts; recycled material of unknown origin is not allowed in the factory, and the source must be registered first.
After blending, all tests must be fully repeated, and production can only increase once performance meets the standards. The differences in tensile strength, rebound, and hardness compared to new material are visible; usage is graded according to purpose, and blending ratios are recorded for traceability.
Three steps for recycled material management: register the source, fix the mixing ratio, and re-test all items after mixing. Store to prevent moisture, as moisture absorption affects performance; odor level is checked according to application, with higher requirements for interior car parts.
Secondary materials are 30% cheaper, but hardness variation is also 30% higher — the money saved is just enough to cover customer complaints. The same goes for recycled materials; don’t just calculate the unit price, including the scrap rate is the real accounting.
After classified use, the cost of non-appearance recycled materials decreases by 10%, and all performance indicators meet the standards. Samples are retained for comparison in each batch; recycled material records are archived, and batch traceability is well-documented.
TPE recycled material is not unusable; the proportion and batch need to be fixed. Random mixing is the source of hardness variation.
Mixing 10%-20% of clean same-system recycled material is usually controllable; recycled material that is from mixed sources or contaminated may become sticky and precipitate, so it should not be used in appearance parts or contact parts. Recycled material should be screened to remove impurities first.
First test small batches with recycled material, then discuss the ratio after measuring hardness, compression, and appearance.
The hardness fluctuates with the proportion of recycled material, and if the drift exceeds ±3A, the customer can notice it; measure the melt flow and hardness for each batch, and in principle, recycled material should not be used for food and medical contact parts.
Regrind finishing acceptance: The three items of blend ratio locking, hardness drift, and appearance follow each batch. For the same clean system, blend 10%-20%, and the hardness drift of each batch should not exceed ±3A; when changing batch materials, start with a small trial batch, and in principle, contact parts should not use regrind.
Cologne customer case: insufficient rebound does not meet the standard, adjusting parameters causes odor during acceptance
A plastic injection processing factory in Wuxi had TPE recycled material parts with insufficient rebound and functional parts not meeting performance standards. Kolon cooperated to adjust the injection molding parameters (mold temperature/material temperature/holding pressure), restoring the rebound, and the odor level met the client's acceptance standards. The parameter window was locked, stabilizing the rebound from the source—when there is a rebound issue, first look at the parameters, then the formulation.
Summary
For TPE regrind selection, first test the smell, then verify the performance. A difference of one level in smell can lead to a difference in reputation inside the car; smell is the benchmark for grading.
