劝你别用降解料，除非你的产品真的需要在土里烂掉。这话听着拧巴，可做这行的都懂——“可降解”三个字听着高级，真到了车间里，怎么回收、能不能再造粒、堆肥到底靠不靠谱，一堆问题甩过来。今天这篇，就把PLA、PBAT这对降解塑料界的“双子星”讲得明明白白：它们回收造粒怎么干，跟堆肥那条路又吵出了什么结果，做降解料的厂这账到底该怎么算，这篇看完，你心里就彻底亮堂了，不用再到处去问了。
先把这对双子星认全。PLA是聚乳酸，从玉米、甘蔗这些淀粉里发酵出乳酸再聚合来的，透明、硬挺，做一次性餐盒、杯盖、餐具很拿手，工业堆肥条件下三到六个月能降解成二氧化碳和水。PBAT是聚己二酸对苯二甲酸丁二醇酯，偏石油基，软、韧、熔体强度高，吹膜特别稳，常跟PLA掺在一起，给发硬的PLA补韧性。两个搭起来，就是市面上降解购物袋、地膜、餐盒的主力配方。宁波市科隆新材料有限公司做塑料原料供应，工贸一体，常见再生塑料品类常年备货，PLA/PBAT这类降解再生料是其中环保要求高、工艺讲究多的一档。
再生PLA/PBAT的来源，跟普通塑料有点不一样。降解料量大头在一次性制品——餐盒、购物袋、地膜，消费后收上来脏得很、混得很，分选难。真正好回收的，是工厂里的工业边角料：吹膜、热成型、注塑掉下来的水口和废料，干净、单一、同配方。行业里有数据，PLA/PBAT复合废膜走“低温破碎—熔融过滤—造粒”闭环，回掺新料控制在百分之十几以内，拉伸强度还能保持在原值的九成上下。所以做降解料再生，先把住工业边角料这道门，比满世界捡旧袋子靠谱得多。宁波市科隆新材料有限公司收这类料，也是优先工厂干净边角，不拿来路不明的消费后杂膜凑。
回收造粒还是送去堆肥，两条路一直吵
降解料这圈子，这两年一直在争一件事：废塑料到底该回收造粒，还是送去堆肥？一派说，埋进土里烂掉才叫真环保；另一派说，堆肥厂根本不够用，边角料不回收造粒就是浪费。这俩听着都有道理，可落到车间里，你得知道自己站哪头。先把堆肥这条路的真实情况说透，你才知道为什么回收造粒慢慢成了主选。
图1 PLA餐盒、PBAT颗粒与造粒机组
降解料不是埋进土里就完事，堆肥没那么神
很多人对降解料有个误会：反正它能降解，用完埋土里就行了。这事得泼盆冷水。PLA的工业堆肥降解，要在五十到六十摄氏度、湿度够、还有特定微生物的堆肥厂里，三到六个月才烂得掉；你直接扔普通土壤或家里花盆，它能安安静静待上几年甚至几十年，海水里更几乎不降解。PBAT在土壤里相对快些，常温下一年左右能掉一大截分量，但也得够湿够有菌。
问题在于，国内的工业堆肥配套根本没跟上。有行业资料显示，截至2025年底，全国真正具备处理可降解塑料能力的工业堆肥厂也就一百多座，主要集中在北上广深这些试点城市，年处理能力有限。大量标称“可堆肥”的降解袋，最后还是进了填埋场或焚烧厂，在那里缺氧、没菌、温度不够，根本烂不动，反而混进传统塑料回收里添乱。这就是降解料绕不开的尴尬：设计它是为了堆肥，现实却堆肥无门。
这里头的门道，在于PLA和PBAT虽然都叫降解料，加工脾气完全两码事。PLA脆、硬，熔体强度低，单独吹膜容易吹破泡，所以纯PLA做不了薄膜，得加PBAT增韧；PBAT软而韧、熔体强度高，吹起膜来泡泡稳得很。这就决定了它们的回收也得分开看：PLA怕潮，一含水熔融就水解断链，强度往下掉，造粒前必须烘透；PBAT相对皮实些，但跟PLA掺在一起的料，回收时得认准是共混配方，别硬拆。说白了，降解料回收的头一关不是设备，是把PLA、PBAT、共混料这几样先分清楚，混着收等于白收。
所以做降解料的厂，心里得有数：别把宝全押在“用完送堆肥”上。你产品设计得再符合堆肥标准，下游消费者和环卫体系未必接得住，最后还是堆在填埋场里。真要把环保账算明白，不如在生产端就把边角料管好——厂内闭环回用，既不污染传统塑料回收，又当场降了本，这才是眼下最实在的循环。至于堆肥，有条件、有订单要求的就走认证路线，没条件的别硬凑，别花了堆肥的溢价，到头来料还是没烂成，钱也白花了。
这就逼出了第二条路——回收造粒。既然堆肥靠不住，那就跟普通塑料一样，把工厂干净的边角料收回来、再造粒、掺回去用。PLA的机械回收其实跟PET很像：破碎、清洗、干燥、熔融造粒，还能化学水解回乳酸单体。PBAT吹膜边角料熔体强度高，闭环再生性也不错。这条路不依赖堆肥厂，当场就能把边角料变钱，这也是眼下降解料再生真正跑得通的主路。
不过回收造粒这条路，也不是闭眼走就行。降解料头一个忌讳，是跟传统PE、PP混到一起。一混进去，这料在堆肥厂里就烂不动了——传统塑料不降解，混在里头等于污染了一批好料，客户要的“可堆肥”认证也跟着作废。所以做得久的回收厂，做降解料再生时都立死一条规矩：降解料专料专收，绝不在回收环节掺传统塑料。另一个讲究是别贪掺量，闭环回用的回掺比例一般控制在百分之十几，掺多了透明度、强度、降解性能都往下飘。小步试、打样看、再加量，是这行的老规矩。下面这张等级表，就是按来源和形态分的。
| 等级 | 主要来源 | 关键指标 | 典型用途 |
|---|
| PLA注塑再生料 | 透明餐具、杯盖注塑水口 | 透明偏硬，可堆肥 | 一次性餐具、杯盖、文具 |
| PLA片材/热成型再生 | 餐盒热成型边角 | 透明，可热成型 | 餐盒、吸塑盒、一次性制品 |
| PBAT吹膜再生料 | 购物袋、地膜吹膜边角 | 柔韧，熔体强度高 | 薄膜、购物袋、农膜 |
| PLA/PBAT共混再生 | 共混改性料厂内边角 | 软硬适中，韧性好 | 降解袋、膜、一次性制品 |
| 淀粉共混再生料 | 淀粉基降解料边角 | 成本低，稍脆 | 低档一次性制品、缓冲 |
| 工业堆肥认证再生料 | 有可堆肥认证料的边角 | 符合堆肥标准 | 出口、品牌降解制品 |
说明：PLA/PBAT再生目前主要参照GB/T 40006.1《塑料 再生塑料 第1部分：通则》及各生产企业的企业标准；降解性能与堆肥条件相关（工业堆肥通常需55~60℃、足够湿度与特定微生物），表中指标为行业公开资料与厂家技术数据归纳，更多等级与物性参数以厂家官方TDS为准。
降解料回收造粒，省的是边角料，守的是降解身份
降解料新料不便宜，工业边角料收回来造粒，确实能省一截。可降解料的回收比普通塑料多一道坎——你不能为了省钱，把“可堆肥”这个身份给丢了。账得这么算。
| 成本项 | 新料 | 再生 | 差异说明 |
|---|
| 吨料价 | 较高 | 低一截 | 工业干净边角料便宜，消费后杂膜更乱 |
| 降解性能 | 符合堆肥标准 | 闭环再生保持较好 | 掺了传统塑料就不算降解料 |
| 透明度/外观 | 新料干净 | 干净水口尚可 | 杂料发黄、有杂质 |
| 加工稳定性 | 窗口稳定 | 需重新干燥调温 | PLA怕潮，含水易水解 |
| 堆肥出路 | 有认证即可堆肥 | 国内堆肥厂少 | 堆肥无门，再生造粒更现实 |
| 综合成本 | 基准 | 对的料才省 | 乱掺传统塑料会砸降解招牌 |
结合这笔账，下面的边界清单帮你判断手里的降解边角料怎么收、怎么用。
适合用再生：工厂干净的PLA/PBAT边角料闭环造粒、小比例掺回新料做同类型制品；地膜、购物袋厂内水口回用。
别往降解料里掺传统PE/PP：一掺进去，这料就不再是可降解料，堆肥认证也跟着作废。
PLA怕潮：再生料造粒前一定烘透，不然含水熔融时水解，分子链断、强度塌。
出口、品牌订单要求可堆肥认证的：认准有认证的再生料，别拿普通杂料冒充。
指望“埋土里就完事”的：现实里堆肥厂很少，再生造粒比堆肥更靠谱。
餐盒厂的边角料，重新流回了生产线
说个典型情景示例，宁波市科隆新材料有限公司在降解料这行经手过一些厂，下面按行业常见情形还原。
华东有家做一次性PLA餐盒的厂，热成型车间每天堆着大量切边废料。以前老板图省事，按废塑料低价处理，可眼看着PLA新料一年比一年贵，心里直打鼓。他也想过自己回用，可试过几次，再生料做出来的餐盒要么发黄、要么发脆，根本过不了客户那关，干脆又扔了。
经同行一介绍，这家厂找来了科隆新材。科隆新材没先问价，先问清楚：废料干不干净、有没有混进普通PP餐盒的边角、热成型工艺温度多高。弄明白后给的思路是：把PLA干净切边单独收，绝不跟别的料混；造粒前彻底烘透水分，低温熔融过滤，小比例掺回新料做同款餐盒；掺量别贪，先从百分之十几试，看透明度和冲片稳不稳再加。关键是守住“不掺传统塑料”这条线，保住这料的降解身份。
这笔账放到行情上看得更清楚。这两年限塑令一推，降解购物袋、可堆肥餐盒的量上得快，工厂里的工业边角料也跟着多起来。可PLA、PBAT新料本身不便宜，做一次性制品利润薄，谁能把车间边角料在它还干净的时候接住，谁的成本就下来一截。问题是这门生意门槛看着低、实则高：你得认得出PLA和PBAT、分得清共混料和纯料、还得守住不掺传统塑料的规矩。光靠热情收一屋子杂袋子，卖不上价还砸自己招牌。所以降解料回收这行，懂行的一直在闷声收工厂边角，不懂行的还在为收来的杂料发愁。
这么试下来，餐盒的透明度和成型都稳住了，边角料不再当废品贱卖，成本也降了一截。老板后来说，以前总觉得降解料回收麻烦，其实麻烦的不是回收，是没把“别乱掺”这条规矩立住。做降解料久了有个共识：它的价值不在埋进土里，在于把干净边角在它还“干净”的时候就接回来。这也是宁波市科隆新材料有限公司收PLA/PBAT再生时，坚持按来源分选、不掺传统塑料的原因——降解料的招牌，砸一次就接不回来了。
这家厂后来把回收写进了车间流程：热成型下来的PLA切边直接进专用料斗，绝不跟别的车间料混；造粒前固定烘温烘时，含水率过了才上机；掺回比例从百分之十起步，每打一批样就看透明度和冲片，稳了再慢慢加。大半年下来，切边废料外销量少了，掺回产线的多了，车间角落也清爽了。老板算了笔账，一年下来光边角料这一项，省的钱够给车间发一笔不小的奖金。
降解料选再生，先问堆肥还是再造粒
最后把应用场景和推荐等级列成一张对照，按图索骥就行。降解料这事，别光看它“能降解”，得看你的产品是真需要降解，还是只是想要个环保名头。这两者差着远着呢，别被“可降解”三个字迷了眼，以为埋在哪都能烂成泥。想明白再下单，省下来的才是真金白银，不是纸面的环保概念，更不是做给客户看、写在包装上的花架子。
| 应用场景 | 推荐等级 | 注意事项 | 何时别用 |
|---|
| 一次性餐具/杯盖 | PLA注塑再生料 | 看透明度 | 要求高透无杂质用新料 |
| 降解购物袋/地膜 | PBAT或共混再生 | 控掺量≤15% | 别掺传统PE |
| 餐盒/吸塑热成型 | PLA片材再生 | 烘透再造粒 | 含水水解别用 |
| 出口/品牌降解制品 | 堆肥认证再生料 | 保留认证 | 普通杂料别冒充 |
| 低档一次性缓冲 | 淀粉共混再生 | 成本低 | 外观要求高别用 |
| 耐用长期使用件 | 谨慎 | 降解料不耐用 | 别拿降解料干耐用活 |
降解料的归处不是土里，是回到它还干净的那条生产线。
再生PLA/PBAT，降解料的降本账
声明：本文提及的品牌及商标权归各自原厂所有。本文为第三方选材知识分享，文中涉及的具体等级、参数、价格、认证等信息以各厂家官方最新资料为准；降解性能以对应标准检测结果为准。本文不构成任何采购或投资建议。
I advise you not to use biodegradable materials unless your product truly needs to rot in the soil. This sounds contradictory, but anyone in this industry understands—those three words 'biodegradable' sound fancy, but when it actually comes to the workshop, questions about how to recycle them, whether they can be re-pelletized, and whether composting is truly reliable all come up. Today’s article will clearly explain the 'twin stars' of biodegradable plastics, PLA and PBAT: how they are recycled and pelletized, what disputes have arisen along the composting route, and how factories producing biodegradable materials should calculate their costs. After reading this, you’ll be completely clear in your mind and won’t have to ask around anymore.
First, let's get familiar with this pair of twins. PLA is polylactic acid, made by fermenting starch from corn, sugarcane, and the like into lactic acid and then polymerizing it. It is transparent and firm, very good at making disposable food containers, cup lids, and utensils, and under industrial composting conditions, it can degrade into carbon dioxide and water within three to six months. PBAT is polybutylene adipate terephthalate, more petroleum-based, soft, tough, with high melt strength, particularly stable for film blowing, and is often blended with PLA to add toughness to the stiff PLA. Together, the two form the main formula for degradable shopping bags, mulch films, and food containers on the market. Ningbo Kolong New Materials Co., Ltd. supplies plastic raw materials, integrating both industry and trade, and commonly keeps stock of various recycled plastic types year-round. Degradable and recycled materials like PLA/PBAT fall into a category with high environmental requirements and more sophisticated processing.
The sources of recycled PLA/PBAT are somewhat different from ordinary plastics. The bulk of degradable material comes from disposable products—like food containers, shopping bags, and mulch film—which are very dirty and mixed after use, making sorting difficult. The materials that are truly easy to recycle are industrial scraps from factories: the waste bits from film blowing, thermoforming, and injection molding, which are clean, uniform, and of the same formulation. There is data in the industry showing that PLA/PBAT composite waste film can go through a 'low-temperature crushing—melt filtration—pelletizing' closed loop, with the recycled content mixed with new material kept to about ten percent, and the tensile strength can still maintain around 90% of the original value. Therefore, when producing recycled degradable materials, securing industrial scraps first is much more reliable than collecting used bags from everywhere. Ningbo Kelong New Materials Co., Ltd. collects this type of material, prioritizing clean factory scraps and not using mixed consumer waste films of unknown origin.
Whether to recycle into pellets or send it for composting, the two options have been constantly debated.
In the biodegradable materials circle, there has been an ongoing debate for the past two years: should waste plastic be recycled into pellets, or sent for composting? One side says that burying it in the soil and letting it decompose is the truly environmentally friendly way; the other side argues that composting plants simply don’t have enough capacity, and not recycling the scraps into pellets is a waste. Both arguments seem reasonable, but when it comes down to the workshop, you need to know which side you are on. Let's first explain the real situation of the composting route, so you can understand why recycling into pellets has gradually become the preferred choice.
Figure 1 PLA food container, PBAT pellets, and granulation unit
Degradable materials aren't just done by burying them in the soil; composting isn't that magical.
Many people have a misunderstanding about biodegradable materials: anyway, they can degrade, so just bury them in the soil after use. This needs to be a reality check. Industrial composting of PLA requires temperatures of 50 to 60 degrees Celsius, sufficient humidity, and a composting facility with specific microorganisms; only then will it decompose in three to six months. If you just throw it into ordinary soil or a home flower pot, it can quietly sit there for years or even decades, and it barely degrades in seawater. PBAT decomposes relatively faster in soil; under normal temperature, it can lose a significant portion of its weight in about a year, but it still requires enough moisture and microbes.
The problem is that the domestic industrial composting infrastructure has not kept up at all. Industry data shows that by the end of 2025, there will be just over a hundred industrial composting facilities nationwide capable of processing biodegradable plastics, mainly concentrated in pilot cities like Beijing, Shanghai, Guangzhou, and Shenzhen, with limited annual processing capacity. A large number of bags labeled as "compostable" eventually end up in landfills or incinerators, where there is a lack of oxygen, microorganisms, and sufficient temperature, making them impossible to decompose, and they instead get mixed into traditional plastic recycling, causing additional problems. This is the unavoidable dilemma of degradable materials: they are designed for composting, but in reality, there is nowhere to compost them.
The trick here is that although both PLA and PBAT are called biodegradable materials, their processing characteristics are completely different. PLA is brittle and hard, with low melt strength, and can easily burst when film-blown on its own, so pure PLA can’t make films and needs PBAT for toughening; PBAT is soft and tough, with high melt strength, and its bubbles are very stable when blown into film. This determines that their recycling must also be considered separately: PLA is moisture-sensitive, and once it melts with water, it hydrolyzes and breaks chains, reducing its strength, so it must be thoroughly dried before pelletizing; PBAT is relatively more robust, but material mixed with PLA must be recognized as a blend formula during recycling, and shouldn’t be forcefully separated. Simply put, the first step in recycling biodegradable materials isn’t the equipment, it’s to first distinguish between PLA, PBAT, and their blends—collecting them mixed is basically useless.
So for manufacturers making degradable materials, you need to be clear in your mind: don’t put all your hopes on 'use it up and compost it.' No matter how well your product meets composting standards, downstream consumers and sanitation systems may not be able to handle it, and in the end, it will still end up in landfills. If you really want to make the environmental balance clear, it’s better to manage scrap materials at the production stage—reusing them within the factory loop, which neither pollutes traditional plastic recycling nor increases costs on the spot. This is currently the most practical form of recycling. As for composting, follow the certification route if conditions and order requirements allow; if not, don’t force it. Don’t spend on the composting premium only to have the material remain un-decomposed in the end, wasting money.
This led to the second path—recycling and pelletizing. Since composting is unreliable, the approach is to treat it like ordinary plastic: collect clean factory scraps, re-pelletize them, and mix them back for use. The mechanical recycling of PLA is actually very similar to PET: crushing, washing, drying, and melt pelletizing, and it can also be chemically hydrolyzed back into lactic acid monomers. PBAT film edge scraps have high melt strength, and their closed-loop recyclability is also good. This path does not rely on composting facilities; the scraps can be turned into money on-site, which is actually the main viable route for the current recycling of degradable materials.
However, the path of recycling and pelletizing isn't something you can just blindly follow. One major taboo with degradable materials is mixing them with traditional PE or PP. Once mixed, this material won’t break down in composting plants—because conventional plastics don’t degrade, mixing them in effectively contaminates a batch of good material, and the 'compostable' certification that customers require becomes invalid. So recycling plants that have been in the business for a long time establish a strict rule when regenerating degradable materials: collect and use degradable materials separately, never mixing them with conventional plastics during recycling. Another point is not to overdo the mixing; in a closed-loop reuse, the recycling proportion is generally controlled at around the teens percentage-wise. Mixing too much leads to drops in transparency, strength, and degradability. The old rule in this industry is to take small steps: test, make samples, and then increase the amount. The table below shows the grades, divided by source and form.
| Level | Main source | Key indicators | Typical uses |
|---|
| PLA injection molded recycled material | Transparent tableware, cup lid injection molding gate | Transparent and slightly hard, compostable | Disposable tableware, cup lids, stationery |
| PLA Sheet Material / Thermoformed Recycled | Heat-formed edges of the lunch box | Transparent, thermoformable | Lunch boxes, blister packs, disposable products |
| PBAT blown film recycled material | Shopping bags, mulch film blown film edges | Flexible, high melt strength | Film, shopping bags, agricultural film |
| PLA/PBAT Blend Recycling | In-plant scraps of blended modified materials | Moderately soft and hard, with good toughness | Degradable bags, films, disposable products |
| Starch Blend Recycled Material | Starch-based biodegradable material scraps | Low cost, slightly crispy | Low-end disposable products, cushioning |
| Industrial Compost Certified Recycled Material | Scraps with compostable certification | Meets composting standards | Export, Brand Degradable Products |
Explanation: The recycling of PLA/PBAT currently mainly refers to GB/T 40006.1 "Plastics – Recycled Plastics – Part 1: General Rules" and the corporate standards of various manufacturers; degradation performance is related to composting conditions (industrial composting usually requires 55~60°C, sufficient moisture, and specific microorganisms). The indicators in the table are summarized from publicly available industry information and manufacturers' technical data. For more grades and physical property parameters, please refer to the manufacturers' official TDS.
Degradable material recycling and granulation saves the scraps and maintains the degradable identity.
Degradable material is not cheap when new, and collecting industrial scraps for granulation can indeed save a bit. But the recycling of degradable materials has an extra hurdle compared to ordinary plastics—you can't sacrifice the 'compostable' status just to save money. The calculations have to be done this way.
| Cost item | New material | Regeneration | Difference Explanation |
|---|
| Price per ton of material | Higher | a bit lower | Industrial clean scraps are cheap, but after use, the miscellaneous films are even more messy. |
| Degradation performance | Meets composting standards | Closed-loop regeneration maintains relatively well | If mixed with traditional plastic, it is no longer considered biodegradable material. |
| Transparency/Appearance | The new material is clean | The fresh water outlet is acceptable | The miscellaneous material is yellowed and contains impurities |
| Processing stability | Window stabilization | Needs to be dried and conditioned again | PLA is afraid of moisture; it easily hydrolyzes when containing water. |
| Composting outlet | Composting is allowed with certification | There are few domestic composting plants | No access to composting, recycling into granules is more realistic |
| Comprehensive cost | Benchmark | Using the right materials saves. | Mixing in traditional plastics will damage the biodegradability reputation |
Based on this account, the boundary list below helps you determine how to collect and use the degraded scraps in your hands.
Suitable for recycling: Factory-clean PLA/PBAT scraps can be reprocessed through closed-loop granulation and mixed back in small proportions with new material to make the same type of products; the sprues from mulch film and shopping bag production can be reused in the factory.
Do not mix traditional PE/PP into degradable materials: once they are mixed in, the material is no longer degradable, and the composting certification will also become invalid.
PLA is afraid of moisture: recycled material must be thoroughly dried before granulation, otherwise the water will hydrolyze during melting, breaking the molecular chains and causing strength collapse.
For export and brand orders that require compostable certification: make sure to use certified recycled materials, and do not pass off ordinary mixed materials as certified.
Relying on 'just burying it in the ground will do': In reality, composting facilities are rare, and recycling into pellets is more reliable than composting.
The scraps from the lunch box factory flowed back into the production line.
Let me give a typical scenario example. Ningbo Cologne New Materials Co., Ltd. has dealt with some factories in the field of degradable materials. Below, we will restore common situations in the industry.
In East China, there is a factory that produces disposable PLA meal boxes, and the thermoforming workshop piles up a lot of trimmed waste every day. Previously, the boss took the easy route and disposed of it at a low price as waste plastic, but seeing that new PLA material was getting more expensive year by year made him nervous. He also considered recycling it himself, but after several attempts, the meal boxes made from recycled material would either turn yellow or become brittle, and simply could not pass customer inspections, so he ended up throwing them away again.
Through a peer introduction, this factory brought in Cologne New Materials. Cologne New Materials didn’t ask about the price first; they asked for clarity first: whether the waste was clean, whether scraps of ordinary PP lunch boxes were mixed in, and how high the thermoforming process temperature was. After understanding these, their suggestion was: collect the PLA cleanly trimmed separately, never mix it with other materials; thoroughly dry the moisture before granulating, melt and filter at low temperature, and blend a small proportion back with new material to make the same type of lunch box; don’t be greedy with the blending ratio—start from just over 10% to see if the transparency and sheet stability are okay before increasing. The key is to stick to the principle of 'no mixing with conventional plastic' to preserve the degradable nature of this material.
Looking at this account in terms of the market makes it clearer. In the past two years, with the push of the plastic restriction orders, the quantity of biodegradable shopping bags and compostable meal boxes has increased rapidly, and the industrial scraps in factories have also increased. But PLA and PBAT new materials themselves are not cheap, and making disposable products yields thin profits. Whoever can catch the workshop scraps while they are still clean can reduce their costs a bit. The problem is that this business, which looks low-threshold, is actually high-threshold: you need to be able to recognize PLA and PBAT, distinguish between blends and pure materials, and follow the rule of not mixing in traditional plastics. Just collecting a roomful of miscellaneous bags with enthusiasm won't earn a good price and might even damage your reputation. So in the business of recycling degradable materials, insiders quietly collect factory scraps, while outsiders are still worried about the miscellaneous materials they’ve gathered.
After trying this out, the transparency and molding of the food containers stabilized, the scraps were no longer sold cheaply as waste, and costs dropped significantly. The boss later said that he used to think that recycling biodegradable materials was troublesome, but actually the problem wasn’t with recycling itself, it was that the rule of 'don’t mix randomly' hadn’t been firmly established. Those who have worked with biodegradable materials for a long time have reached a consensus: their value is not in being buried in the soil, but in retrieving clean scraps while they are still 'clean.' This is also why Ningbo Cologne New Materials Co., Ltd. insists on sorting PLA/PBAT recyclables by source and not mixing them with conventional plastics — because the brand of biodegradable materials can’t be restored once it’s ruined.
The factory later incorporated recycling into the workshop process: the trimmed PLA from thermoforming goes directly into a dedicated hopper, never mixed with materials from other workshops; before granulation, the drying temperature and time are fixed, and only materials with excessive moisture content are put into the machine; the recycling ratio starts at 10%, and every batch is checked for transparency and sheet quality, gradually increasing once stable. After more than half a year, the external sales of trim waste decreased, more was recycled back into the production line, and the workshop corners became cleaner. The boss calculated that in just one year, the savings from trim materials alone were enough to give the workshop a substantial bonus.
Choose recycled material for degradation, first ask whether it is for composting or re-pelletizing
Finally, list the application scenarios and recommended levels in a comparison chart, and just follow it. Regarding degradable materials, don't just look at the fact that they 'can degrade'; you need to consider whether your product really needs to be degradable or if you just want an eco-friendly label. There's a big difference between the two. Don't be blinded by the words 'degradable' and think it will turn to mud anywhere it's buried. Make sure you understand this before placing an order; the real savings are actual money, not just the conceptual idea of being eco-friendly, and certainly not something to show off to customers or print on packaging.
| Application scenario | Recommendation Level | Precautions | When not to use |
|---|
| Disposable tableware/cup lid | PLA injection molded recycled material | Check the transparency | Requires high transparency, no impurities, using new material |
| Degradable shopping bags/ground film | PBAT or blended recycling | Control admixture content ≤ 15% | Don't mix in traditional PE |
| Meal Box / Thermoformed Blister | PL A Material Recycling | Bake through before granulation | Do not use with aqueous hydrolysis |
| Export/Brand Biodegradable Products | Compostable Certified Recycled Material | Retain certification | Don't pretend ordinary junk is something special |
| Low-grade disposable cushioning | Starch blending regeneration | Low cost | High appearance standards, do not use |
| Durable long-term use part | Cautious | Degradable materials are not durable | Don't use degradable materials to do durable work |
The destination of degradable materials is not the soil, but back to the production line where they are still clean.
Recycled PLA/PBAT, Cost Reduction Account for Degradable Materials
Disclaimer: The brands and trademarks mentioned in this article belong to their respective original manufacturers. This article is a third-party material selection knowledge sharing; specific grades, parameters, prices, certifications, and other information mentioned herein are subject to the latest official data from each manufacturer; degradability performance is based on the corresponding standard test results. This article does not constitute any procurement or investment advice.
