吨包单价看着香，一算良率全白搭。大包便宜，账得按良率算。
单价香良率垮，账没按良率算
TPE 大包料是“吨级货”：吨包便宜，账要按良率算。结论先给：吨包便宜，账按良率算——良率，是大包的账本。
TPE大包料最大的坑：单价省两百，良率掉五个点，白忙一场——良率，是大包的真账。
大包料是成本账：算清良率，才敢买大包。算不清，省了单价亏了良率——大包，是采购的算术题。
吨包单价低，为什么还得算总账
大包料按吨卖：单价低，运费省。大包，是成本的通道。
大包有风险：批次大，万一差全亏。良率，是大包的账本。
大包要仓储：占地方，怕吸潮。仓储，是大包的成本。
单价、良率、仓储，三本账怎么算
单价：吨包单价低。单价，是表面的便宜。
良率：良率差，单件成本高。良率，是真正的账。
仓储：仓储费用加进去。仓储，是隐藏的成本。
大包账，一张表对照清楚
| 采购方式 | 单价 | 良率 | 总账 |
|---|
| 小包 | 高 | 高 | 中 |
| 大包 | 低 | 中 | 中 |
| 吨包 | 最低 | 波动 | 算清 |
表格读法：单价越低，良率越要盯，一吨省的钱不够补报废。
按良率算，账才清楚。
算总账不吃亏，验收核这四项
| 项目 | 要求 | 判断 |
|---|
| 单价 | 对比 | 核验 |
| 良率 | 试产 | 核验 |
| 仓储 | 可控 | 核验 |
| 批次 | 锁定 | 核验 |
表格读法：大包一项项核，账看得见，良率和损耗分开记。
良率，是大包的账本。
只看单价不算良率，省钱变亏钱
坑一：只看单价。一吨省三百，报废多花两千，账反着算——良率必算。
坑二：仓储漏算。成本高——仓储必算。
坑三：批次不锁。波动——批次锁定。
良率、损耗、资金——买前问清
三问：什么单价、什么良率、什么仓储条件。一验：小批试产实测——三问一验，供应商底细清楚。
良率验证要先行：先按小批良率把吨包总成本算出来，再谈签单——良率，是大包的真账。
留样要成习惯：每批留样，物性按批次复测。批次换料先对比再放量——批次稳，客诉少。
良率低、受潮、结块：对照一张表
| 现象 | 原因 | 对策 |
|---|
| 单价低良率差 | 批次波动 | 试产验证 |
| 吸潮 | 仓储差 | 控仓储 |
| 批次漂 | 来源混 | 锁批次 |
| 成本高 | 良率低 | 换料 |
| 客诉 | 账没算清 | 按良率算 |
吨包单价最低，良率一波动就把差价赔回去。 单价看着便宜，良率一垮，总账比小包还贵。
单价越低，良率越要盯。 大包料先小批试产看良率，良率没跑稳，低价都是账面数字，落不到钱上。
小包单价高、良率稳；吨包单价低、波动大。 按年用量算总账，别只看每公斤价，用量不大上吨包不划算。
仓储是大包的“隐藏成本”，受潮结块性能就漂。 问清原包密封、防潮，库存太久的料别囤，囤陈料等于囤问题。
吨包试产良率和小包持平、仓储损耗算清，总账才真划算。 良率跑三批全稳再放大包，别一批定终身。
吨包拆包后要密封防潮，吸了潮的料颗粒发黏、下料就堵。
拆口当天用完或扎口密封，回潮料先烘料再上机，别省这道，受潮料做出来表面发雾。
大包料先小批试产看良率，良率没跑稳低价都是账面数字。三批良率都过95%再签大包，单价便宜300一吨，良率掉5%总账反而贵。
大包料库存按周转天数管，超三个月先复检再用。吨包易吸潮，梅雨季露天堆放一周就结块，上机前80℃烘2-4h，含水率超0.1%表面银纹气泡。
良率跑三批全稳再放大包，别一批定终身。问清原包密封防潮，库存太久的料别囤，囤陈料等于囤问题，按年用量算总账别只看每公斤价。
单价看着便宜良率一垮总账比小包还贵
。大包料先小批试产看良率良率没跑稳低价都是账面数字落不到钱上，按年用量算总账别只看每公斤价用量不大上吨包不划算。
大包料先小批试产三批良率都过95%再签大包。单价便宜300一吨良率掉5%总账反而贵，吨包易吸潮梅雨季露天堆放一周就结块上机前80℃烘2-4h。
科隆客户案例：异味退货压仓，定制牌号良率98%
台州一家改性料应用厂，TPE 大包料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%。按工况定制，异味从源头断——气味问题，先查基材和油。
小结
TPE大包料的采购，良率先算，单价再看，吨包便宜账按良率算，良率是账本。
The unit price of bulk bags looks appealing, but once you calculate the yield rate, it's all for nothing. Large bags are cheap, but the account must be based on the yield rate.
The unit price and yield rate are bad, and the accounts were not calculated according to the yield rate.
TPE bulk material is a 'tonnage-level product': ton bags are cheap, but accounts must be calculated according to yield. Here's the conclusion first: ton bags are cheap, accounts are based on yield — yield is the ledger of bulk material.
The biggest pitfall of TPE bulk materials: saving 200 per unit in price, losing 5% in yield, all for nothing — yield is the real account of bulk materials.
Bulk material is a cost account: only when the yield rate is calculated clearly can one dare to buy in bulk. If it's not calculated clearly, saving on unit price results in losing on yield — bulk buying is an arithmetic problem for procurement.
The unit price of the ton bag is low, so why do we still have to calculate the total account?
Bulk materials are sold by the ton: low unit price, saving on shipping costs. Bulk is a channel for cost.
Big batches carry risks: if the batch is large, any defect could lead to total loss. Yield is the ledger for big batches.
Large bags require storage: they take up space and are prone to moisture absorption. Storage is the cost of large bags.
Unit price, yield, storage—how to calculate the three accounts
Unit price: The unit price of ton bags is low. Unit price is superficially cheap.
Yield: Poor yield, high cost per unit. Yield is the real account.
Warehousing: Include warehousing costs. Warehousing is a hidden cost.
A comprehensive account, everything clearly compared on one sheet
| Procurement Method | Unit price | Yield | General Ledger |
|---|
| Small package | Tall | Tall | middle |
| big bag | Low | middle | middle |
| ton bag | lowest | Fluctuation | Settle accounts |
How to read the table: The lower the unit price, the more closely you need to monitor the yield, because the money saved per ton is not enough to cover the cost of scrap.
The accounts are only clear when calculated by yield.
Keeping track ensures no loss, check these four items during inspection
| Project | Requirement | Judgment |
|---|
| Unit price | Contrast | Verification |
| Yield | Trial Production | Verification |
| Storage | Controllable | Verification |
| Batch | Lock | Verification |
How to read the table: Check each item in large batches, the accounts are visible, and yield and loss are recorded separately.
Yield rate is the ledger of the large package.
Only looking at the unit price doesn't count the yield; saving money turns into losing money.
Pitfall 1: Only looking at the unit price. Saving 300 per ton but spending an extra 2,000 on scrapped products, the math is reversed—you must calculate yield.
Pitfall 2: Storage costs being overlooked. High costs — storage must be accounted for.
Pitfall three: batches are not locked. Fluctuation — batch locking.
Yield, loss, funds — ask clearly before buying
Three questions: what unit price, what yield, what storage conditions. One test: small batch trial production measurement — with three questions and one test, the supplier's details are clear.
Yield verification must come first: first calculate the total cost of the bulk bag based on the small batch yield, then discuss signing the order—yield is the true account of the large bag.
Making sample retention a habit: retain samples for each batch, and re-test the physical properties by batch. Before switching materials between batches, compare them first before scaling up—the batch is stable, and customer complaints are few.
Low yield, moisture absorption, caking: compare with a table
| Phenomenon | Reason | Countermeasure |
|---|
| Low unit price, poor yield | Batch fluctuation | Trial Production Verification |
| Moisture absorption | Poor storage | Controlled storage |
| Batch bleaching | Source Mixed | Lock batch |
| High cost | Low yield | Material change |
| Customer complaint | The accounts haven't been settled | Calculated based on yield |
The unit price of bulk bags is the lowest, but any fluctuation in yield will wipe out the price difference. The unit price looks cheap, but if the yield collapses, the total cost will be higher than that of small packages.
The lower the unit price, the more closely you need to monitor the yield. For bulk materials, start with a small trial production to check the yield. If the yield is not stable, a low price is just a number on paper and won't translate into actual money.
Small packages have a high unit price and stable yield; ton bags have a low unit price and large fluctuations. Calculate the total cost based on annual usage, don't just look at the price per kilogram; if the usage is not large, buying ton bags is not cost-effective.
Storage is the 'hidden cost' of large bags; if exposed to moisture, they clump and their performance declines. Make sure to check the sealing of the original package and moisture protection; don't stock materials that have been in inventory for too long, storing old materials is equivalent to storing problems.
The yield of trial production with ton bags is on par with small bags, and only when storage losses are accounted for is the overall cost truly worthwhile. Wait until the yield is stable over three batches before scaling up to large bags; don’t make a lifetime decision based on a single batch.
After unpacking ton bags, they should be sealed to prevent moisture. Moisture-absorbed material particles become sticky and will clog during feeding.
Use up the material on the day the package is opened or seal it tightly. Moisture-absorbed material should be dried before use; don’t skip this step, as products made from damp material will have a foggy surface.
For large orders, first do a small trial production to see the yield. If the yield is not stable, the low price is just a theoretical number. Only sign a large order after three batches all exceed 95% yield. If the unit price is 300 cheaper per ton but the yield drops by 5%, the total cost actually becomes higher.
Bulk material inventory is managed according to turnover days. If it exceeds three months, it must be re-inspected before use. Ton bags are prone to moisture absorption; during the plum rain season, storing them outdoors for a week will cause clumping. Before feeding into the machine, bake at 80°C for 2-4 hours. If the moisture content exceeds 0.1%, surface silver streaks and bubbles will appear.
Run three batches to stabilize the yield before scaling up the full batch; don't decide lifespan based on a single batch. Ask clearly about the original package's sealing and moisture protection. Don't stock materials that have been in storage for too long; hoarding old materials is like hoarding problems. Calculate the total cost based on annual usage instead of just looking at the price per kilogram.
The unit price looks cheap, but if the yield collapses, the total cost is even higher than small packages.
For large orders of materials, first conduct a small-batch trial production to see the yield. If the yield is unstable, low prices are just numbers on paper and won't translate into actual money. When calculating the total cost based on annual usage, don’t just look at the price per kilogram; if the usage isn’t large, buying by the ton is not cost-effective.
For large batches of material, first conduct small trial productions; once the yield rate exceeds 95% in three batches, then sign for the large batch. If the unit price is 300 cheaper per ton but the yield rate drops by 5%, the total cost will actually be higher. Ton bags are prone to absorbing moisture; during the plum rain season, if stored outdoors for a week, they clump together and need to be dried at 80°C for 2-4 hours before being processed.
Cologne Customer Case: Returns Due to Odor, Overstocking, Customized Grade Yield 98%
A modified material application factory in Taizhou had its large TPE compound products returned by downstream customers due to odor, and the goods were held in the warehouse. Kolon cooperated to customize oil-resistant/temperature-resistant special grades, eliminating the odor, with mass production yield stabilizing at 98%. Customized according to working conditions, the odor is cut off from the source—when dealing with smell issues, first check the base material and oil.
Summary
For the procurement of large TPE batches, first calculate the yield, then look at the unit price. The cost of bulk bags is calculated based on the yield; yield is the ledger.
