你家阳台上那根用了十几年、发白却没漏水的下水管，窗户上贴了快二十年还没变色的塑钢窗，脚底下那片仿木纹的塑料地板——它们大概率都是PVC做的。而这些东西用到报废那天，并没有真的消失，而是被回收、破碎、再造粒，换个样子又回到了管材厂、型材厂的生产线。这就是再生PVC的日常：它从不高调，却早已悄悄渗进了你生活的每一根管子里。
先花两分钟认识下主角。宁波市科隆新材料有限公司是一家工贸一体的塑料原料供应企业，长期做再生塑料原料，品类覆盖PP、PE、ABS、PC、PET、PVC等多个方向。今天说的再生PVC，是聚氯乙烯回收再造的料。PVC这东西有点特别：它本身热稳定性差，加工时不加稳定剂就会受热分解放出氯化氢，颜色一路往黄、往黑走；所以不管新料还是再生料，做PVC的厂，手里真正捏着命门的不是树脂，是那一桶桶稳定剂。再生PVC的来源也很杂——废弃的排水管材、塑钢门窗型材、废旧电缆外皮、旧地板革、人造革制品，分类、筛选、粉碎之后，要么直接当粉状未增塑料（行内叫PVC-U）用，要么熔融挤出造粒成颗粒状的再生增塑料（行内叫PVC-P）。GB/T 40006.11—2024《塑料 再生塑料 第11部分：聚氯乙烯（PVC）材料》就是给它立的规矩，2025年4月1日起正式实施。
再生PVC不是捡破烂，是把配方重新配一遍
很多人对再生PVC的印象还停留在“回炉的废料，做出来的管子不靠谱”。这话搁二十年前也许还说得过去，搁今天就落伍喽。再生PVC的真正难点，从来不是“能不能用”，而是“配方跟没跟上”。
新PVC树脂进厂，干净、分子量均匀、增塑剂和稳定剂都是按配方新配的，照着成熟配方做就行。再生PVC不一样：它进来的时候，树脂里可能已经混了碳酸钙、旧稳定剂、残留的增塑剂、颜色不一的杂质，分子量还因为上次加工掉过一截。你要是拿着新料的配方直接套，多半要出问题——颜色发暗、表面粗糙、挤出不稳。所以做再生PVC，干的就是拿一堆“半旧的料”重新配方子：补多少稳定剂、补多少增塑剂、掺多少新料兜底、加多少填充，全靠经验和检测数据一点点调。配方对了，再生料撑很多年没问题；配方错了，三个月就变色变脆。
GB/T 40006.11—2024把这种“配方底子”写得很细：再生料要求颗粒均匀、色泽一致，无杂质、油污、异物和霉变；气味等级有明确上限；重金属、以及DEHP、BBP、DBP、DIBP这几种邻苯类增塑剂都有限量要求。这些条款卡的不是“回收两个字”，而是回收过程有没有把有害物质控制住。
再把硬和软这层窗户纸捅破。PVC这一家子，做硬管子、硬型材的叫未增塑聚氯乙烯，行内缩写PVC-U，配方里不加增塑剂，靠填充和增强把硬度、刚度做上去；做电缆皮、人造革、软软管的叫增塑聚氯乙烯，行内缩写PVC-P，配方里加了增塑剂，所以柔软有弹性。这两种料回收之后不能胡乱掺——硬料里混进了软料，做出来的管子就发软、尺寸不稳；软料里混进了硬料，做护套就发硬开裂。所以再生PVC进厂的头一道关，就是把硬的和软的分开。分错了，后面配方再怎么补都救不回来。
回收再生的路子也不复杂：废旧PVC制品先按硬软、颜色分类，去掉金属、木材、橡胶这些异类杂质，再粉碎、清洗、干燥。硬质的有的直接磨成粉供挤出掺混，有的重新熔融造粒；软质的因为带增塑剂，一般造粒成PVC-P颗粒。整条线的关键不在粉碎——粉碎机谁都有，而在“分”这一步：分得越干净、越纯，造出来的料等级越高、卖得越贵；分得糊里糊涂，硬软混一锅，就只能做低填充、低要求的杂件。这也是为什么同样叫“再生PVC”，价格能差出一大截——差的就是分选的功夫。
图1 再生PVC管材挤出车间
稳定剂选对了，再生PVC才立得住
要听懂再生PVC，先把稳定剂这门课补上。PVC加工时最怕高温停留，一过热就分解变色，稳定剂的任务就是在加工温度下“按住”它，让它好好熔融成型而不是当场黑化。再生料因为经历过一轮加工，底子更虚，对稳定剂的依赖反而比新料还重。行业里主流的稳定体系就这么几派，各有各的地盘：
铅盐类稳定体系，热稳定好、成本低，硬管、型材、电缆料都能用，历史上用得很广；但铅是重金属，毒性和环保限制越来越严，民用、给水、出口类产品上正在收缩。钙锌复合体系，环保、能过RoHS这类要求，做给水管材、型材、电缆料越来越普遍，缺点是对配方调整更讲究。有机锡体系，透明性好、热稳定高，做透明片材离不开，但价格高、润滑要单独配。用量上，硬管、型材一般加2到4份（按每100份树脂计），电缆料这类软制品加到3到5份。这套体系怎么选，直接决定了你的再生PVC能不能用、用在哪。
宁波市科隆新材料有限公司跟客户对接再生PVC，头一件事不是报价，而是先把用途摸清楚：硬制品还是软制品，走挤出还是注塑，产品过不过环保和出口要求。用途定了，再去对稳定剂体系和料的等级，能少走很多弯路。
还有个细节很多新客户会忽略：再生PVC的“吃料习惯”跟新料不一样。新树脂分子量整齐，螺杆转速、温度区间照着工艺单走就行；再生料因为来源杂、分子量有高有低，同样一台挤出机，可能要把温度曲线、喂料速度、螺杆组合重新摸一遍。这就是为什么换再生料头几批总要留一点调机余量——别一上来就满负荷跑，先把工艺窗口试出来，再放量。这些经验，靠的是一家一家工厂踩出来的，不是看一页TDS就能学会的。
下面这张表，把市面上常见的再生PVC等级按来源和用途理清楚，数据依据GB/T 40006.11—2024及行业公开资料整理。
| 等级名称 | 主要来源/工艺 | 关键控制项 | 典型用途 |
|---|
| 再生PVC-U硬管级料 | 废弃管材、管件破碎分选 | 颗粒均匀、色泽一致，重金属与邻苯增塑剂达标 | 排水管材、管件、穿线管 |
| 再生PVC-U型材级料 | 塑钢门窗、型材边角料 | 加工流动性、焊角强度可控 | 型材、扣板、踢脚线、百叶 |
| 再生PVC软质颗粒（PVC-P） | 废旧电缆皮、软制品造粒 | 邻苯增塑剂限量达标，绝缘性合格 | 电缆护套、软管、人造革 |
| 再生PVC地板料 | 地板革、地砖回收再造 | 填料含量较高，耐磨压痕可控 | PVC地板、地板革、脚垫 |
| 再生PVC透明级 | 透明软片、膜回收 | 杂质少、透光性较好 | 透明片、文具、吸塑包装 |
| 再生PVC-U粉料 | 硬制品粉碎不造粒 | 符合粉状未增塑料要求 | 管材挤出、改性掺混 |
表注：以上依据GB/T 40006.11—2024《塑料 再生塑料 第11部分：聚氯乙烯（PVC）材料》及行业公开资料整理；标准对增塑剂（如DEHP、BBP、DBP、DIBP）限量、重金属及气味等级均有要求。更多等级与物性参数以厂家官方TDS为准。
账要算到配方里，光比料价容易吃亏
再生PVC的降本账，比别的料更需要拆开看。料价上，再生PVC确实比新树脂便宜，这也是管材、型材、地板这些量大、对成本敏感的行业大批量用它的原因。但PVC这行有个别的料没有的特点：你省下来的料钱，很可能被稳定剂、调机、次品给吃回去。所以光看每吨报价做决定，在PVC这行特别容易栽跟头。
举个例子：用便宜的再生硬管料配了不够用的稳定剂，挤出时温度稍高就发黄变色，一批管子颜色不均，客户拿色差说事；为了压成本把再生料掺得太猛，焊角强度不达标，型材装到窗户上一晃就裂，返工加索赔，省的钱全赔进去。宁波市科隆新材料有限公司提醒客户：算再生PVC的账，一定要把稳定剂成本、掺混比例、良率和退货一起算，不能只盯着每吨料的差价。
| 成本项 | 新料原生PVC | 再生PVC（对等级） | 差异说明 |
|---|
| 树脂采购价 | 基准价 | 低一截 | 再生料主要优势，管材型材地板明显 |
| 稳定剂成本 | 按成熟新配方配 | 可能需补稳定剂/调整体系 | 底子虚的料更吃稳定剂 |
| 加工良率 | 稳定 | 初期需调配方 | 掺混比例、稳定剂没配对就出次品 |
| 外观/色差 | 均匀 | 易偏暗、偏杂色 | 本色一致级更贵，杂色级更便宜 |
| 环保合规 | 成熟 | 邻苯、重金属需检测达标 | 给水/出口/食品相关要求更严 |
| 综合成本 | 高 | 配方到位则更低 | 配方不对，省的钱全赔回去 |
边界清单也给你列好了：
放心用：排水管材、穿线管、普通型材、扣板踢脚线、地板革、人造革、非透明软制品，这些是再生PVC的主场。
要留心：给水管、接触食品的制品，稳定剂体系和增塑剂要按环保卫生要求选，过检测；透明制品得用透明级，杂色料别硬上。
别碰：对长期耐候、高焊角强度有硬性要求的关键受力型材，再生料掺比要收着来；来源不明、混了金属和油污的废料，重金属和邻苯不达标，再便宜也不能用。
管子变没变色，三个月后才见分晓
先说个行业里不少厂都踩过的坑（情节为便于理解做了归纳）。宁波周边一家做排水管材的厂，前两年图便宜进了一批低价再生PVC硬料，配方还是照着新料那套用。刚开始挤出看着还行，可做出来的管子放了不到三个月，颜色明显发黄变深，表面也粗糙，客户投诉色差。他们一开始以为是料的问题，换了一家供应商还是老样子，折腾了好几个月。
后来经同行牵线，这厂联系上了宁波市科隆新材料有限公司。科隆新材看过样品和他们的配方表，症结一下就清楚了：再生硬料底子偏旧，原来配的稳定剂量不够，扛不住挤出温度，料一过热就变色。接下来的做法是，把再生料和新料按合适比例掺混兜底，针对排水、穿线用途配适配的复合稳定体系，按phr用量补齐；同时每批料都要附重金属和邻苯增塑剂的检测报告。这么调完，挤出温度稳了，管子颜色均匀、放久了也不变黄，焊角强度重新达标。这厂后来就固定按这套配方走，再没因为色差和耐候性被退过货。
再生PVC这行，料价只是入场券，配方才是真本事。便宜的料配上对的稳定体系，能撑很多年；贵的料配错了方子，三个月就露馅。说真的，再生PVC不是掺得越多越省，掺到一定比例，加工窗口会变窄，良率不升反降；找到那个既省钱又稳得住的掺混点，才是真账。这个比例没有万能公式，得跟着设备、模具、制品要求一点点试出来——而这，恰恰是长期供料能帮上忙的地方。
（注：情节据行业常见问题归纳，非某一真实成交记录。）
先想清楚做什么件，再决定上什么料
最后把常见场景和推荐等级汇总成速查表，采购对着用。
| 应用场景 | 推荐等级 | 注意事项 | 何时别用 |
|---|
| 排水管材/穿线管 | 再生PVC-U硬管级料 | 配适配复合稳定剂 | 高卫生给水要求 |
| 塑钢型材/扣板 | 再生PVC-U型材级料 | 盯焊角强度与耐候 | 关键受力外窗结构件慎用 |
| 电缆护套/软管 | 再生PVC-P软质颗粒 | 邻苯增塑剂须达标 | 高绝缘指标要求高的场合 |
| PVC地板/地板革 | 再生PVC地板料 | 接受较高填料含量 | 高耐磨静音高端地板慎用 |
| 透明片/文具 | 再生PVC透明级 | 杂质少、透光要好 | 杂色再生料做透明件 |
| 改性掺混/降本 | 再生PVC-U粉料 | 按比例掺混新料兜底 | 纯再生直接做高精度件 |
排水穿线用再生料放心，给水食品件别抠料，出口订单别拿重金属赌——料怎么选，看你做的是什么件。
再生PVC，稳定体系对了能用很多年
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。本文不构成任何采购或投资建议。
The drainpipe on your balcony that has been used for more than ten years, turned white but never leaked; the uPVC window on your house that has been in place for almost twenty years without discoloration; the wood-patterned plastic flooring under your feet — chances are, they are all made of PVC. And when these items reach the end of their life, they don't really disappear; they are recycled, crushed, re-pelletized, and in a new form return to the production lines of pipe and profile factories. This is the everyday life of recycled PVC: it never shows off, yet it has quietly seeped into every pipe in your life.
Let's take two minutes to get to know the main character. Ningbo Cologne New Materials Co., Ltd. is a plastic raw material supply company that integrates both trade and manufacturing. It has long been engaged in recycled plastic raw materials, covering a variety of categories including PP, PE, ABS, PC, PET, PVC, and more. Today, we're talking about recycled PVC, which is material made from recycled polyvinyl chloride. PVC is a bit special: it has poor thermal stability on its own, and if no stabilizer is added during processing, it will decompose when heated and release hydrogen chloride, with its color gradually turning yellow and then black. Therefore, whether it is new or recycled material, what PVC manufacturers truly rely on is not the resin itself but the barrels of stabilizer in their hands. The sources of recycled PVC are also quite diverse — discarded drainage pipes, PVC doors and window profiles, waste cable sheaths, old flooring, and artificial leather products. After sorting, screening, and crushing, it can either be directly used as a powdered non-plasticized material (known in the industry as PVC-U) or melt-extruded into granulated recycled plasticized material (known in the industry as PVC-P). GB/T 40006.11—2024 'Plastics—Recycled Plastics—Part 11: Polyvinyl Chloride (PVC) Materials' sets the rules for this, and it will be officially implemented on April 1, 2025.
Recycled PVC is not about picking up scraps; it's about reformulating the recipe.
Many people still have the impression that recycled PVC is 'scrapped material melted down, and the pipes made from it are unreliable.' This statement might have been acceptable twenty years ago, but today it is outdated. The real difficulty with recycled PVC has never been 'whether it can be used,' but 'whether the formulation has kept up.'
When new PVC resin arrives at the factory, it is clean, has a uniform molecular weight, and the plasticizers and stabilizers are freshly prepared according to the formula—just follow the established recipe. Recycled PVC is different: when it comes in, the resin may already be mixed with calcium carbonate, old stabilizers, residual plasticizers, and impurities of different colors, and its molecular weight may have decreased due to previous processing. If you try to apply a formula made for new material directly, it will likely cause problems—darkened color, rough surface, and unstable extrusion. So, working with recycled PVC involves taking a batch of 'semi-old material' and re-formulating it: how much stabilizer to add, how much plasticizer to supplement, how much new material to mix in for backup, and how much filler to include—all adjusted little by little based on experience and test data. With the right formula, recycled PVC can last for many years without issues; with the wrong formula, it will discolor and become brittle in three months.
GB/T 40006.11—2024 details this kind of 'formulation base' very thoroughly: recycled materials are required to have uniform granules, consistent color, and be free of impurities, oil stains, foreign matter, and mildew; there is a clear upper limit for odor levels; heavy metals, as well as phthalate plasticizers such as DEHP, BBP, DBP, and DIBP, all have limit requirements. These provisions are not focused on the word 'recycling,' but on whether harmful substances are controlled during the recycling process.
Next, poke through the layer separating hard and soft. The PVC family: the ones used to make hard pipes and rigid profiles are called unplasticized polyvinyl chloride, abbreviated in the industry as PVC-U; their formula doesn't include plasticizers, relying on fillers and reinforcements to achieve hardness and rigidity. Those used for cable insulation, artificial leather, and soft tubes are called plasticized polyvinyl chloride, abbreviated as PVC-P; their formula includes plasticizers, so they are soft and elastic. After recycling, these two materials cannot be mixed carelessly—if soft material gets into hard material, the produced pipes will become soft and dimensionally unstable; if hard material gets into soft material, the coatings will become hard and crack. Therefore, the first crucial step when recycled PVC enters the factory is to separate the hard from the soft. If separated incorrectly, no matter how the formula is adjusted later, it cannot be salvaged.
The recycling and regeneration process is not complicated: used PVC products are first sorted by hardness, softness, and color, and foreign materials like metal, wood, and rubber are removed, then they are crushed, washed, and dried. Hard PVC can either be ground into powder for mixing during extrusion or melted again and pelletized; soft PVC, containing plasticizers, is generally pelletized into PVC-P granules. The key to the whole production line is not the crushing—anyone can have a crusher—but the 'sorting' step: the cleaner and purer the sorting, the higher the grade of the material and the more expensive it can be sold; if sorting is sloppy and hard and soft materials are mixed together, it can only be used for low-filling, low-requirement miscellaneous items. This is why products all called 'recycled PVC' can vary so much in price—the difference lies in the sorting process.
Figure 1 Recycled PVC Pipe Extrusion Workshop
Choosing the right stabilizer is the only way for recycled PVC to stand firm
To understand recycled PVC, first catch up on the topic of stabilizers. The biggest fear during PVC processing is prolonged high temperatures; once it overheats, it decomposes and changes color. The role of stabilizers is to 'hold it steady' at processing temperatures, allowing it to melt and shape properly instead of turning black on the spot. Recycled material, having already gone through one processing cycle, is more vulnerable and actually relies on stabilizers even more than virgin material. The main stabilizer systems in the industry are limited to a few types, each with its own territory:
Lead salt stabilized systems have good thermal stability and low cost, and can be used for rigid pipes, profiles, and cable materials. They were widely used historically; however, lead is a heavy metal, and its toxicity and environmental restrictions are becoming increasingly strict, leading to a reduction in use for civil, water supply, and export products. Calcium-zinc composite systems are environmentally friendly, can meet RoHS and similar standards, and are increasingly used for water pipes, profiles, and cable materials. The drawback is that they require more careful formulation adjustments. Organic tin systems have good transparency and high thermal stability and are indispensable for making transparent sheets, but they are expensive and require separate lubrication. In terms of usage, rigid pipes and profiles typically add 2 to 4 parts (per 100 parts of resin), while soft products like cable materials are added at 3 to 5 parts. How this system is chosen directly determines whether your recycled PVC can be used and what it can be used for.
Ningbo Kelong New Materials Co., Ltd. connects with customers regarding recycled PVC, and the first thing they do is not to quote a price, but to first understand the intended use: whether it is for rigid or flexible products, whether it will be processed by extrusion or injection molding, and whether the product meets environmental and export requirements. Once the use is determined, they then address the stabilizer system and the grade of the material, which can avoid many detours.
There's another detail that many new customers overlook: the “feeding habits” of recycled PVC are different from those of virgin material. Virgin resin has uniform molecular weight, so you can just follow the processing sheet for screw speed and temperature zones; recycled material, because of its mixed origin and varying molecular weights, may require adjusting the temperature profile, feed rate, and screw configuration even on the same extruder. This is why when switching to recycled material, you always need to leave some margin in the first few batches—don’t run at full load right away; first find the process window, then increase the volume. These experiences are gained through trial and error at each factory, not something you can learn from a single page of TDS.
The following table organizes the commonly seen recycled PVC grades on the market according to their source and usage. The data is compiled based on GB/T 40006.11—2024 and publicly available industry information.
| Level Name | Main Sources / Processes | Key control item | Typical uses |
|---|
| Recycled PVC-U rigid pipe grade material | Scrapping and Sorting of Discarded Pipes and Pipe Fittings | The particles are uniform in size and color, and the heavy metals and phthalate plasticizers meet the standards | Drainage pipes, pipe fittings, conduit pipes |
| Recycled PVC-U profile grade material | Plastic steel doors and windows, profile offcuts | Machinability and weld fillet strength controllable | Profiles, ceiling panels, skirting boards, louvers |
| Recycled PVC soft granules (PVC-P) | Recycling of old cable sheaths and soft products into granules | The limit for phthalate plasticizers has been met, and the insulation is qualified. | Cable sheaths, hoses, artificial leather |
| Recycled PVC flooring material | Flooring vinyl and floor tile recycling and remanufacturing | The filler content is relatively high, and wear and indentation resistance is controllable | PVC flooring, vinyl flooring, floor mats |
| Recycled PVC Transparent Grade | Transparent soft sheets, film recycling | Fewer impurities, better light transmission | Transparency sheets, stationery, blister packaging |
| Recycled PVC-U powder | Hard products are crushed but not granulated | Meets the requirements for non-plasticized powder | Pipe material extrusion, modification and blending |
Table Note: The above is compiled based on GB/T 40006.11—2024 "Plastics—Recycled Plastics—Part 11: Polyvinyl Chloride (PVC) Materials" and publicly available industry information; the standard imposes limits on plasticizers (such as DEHP, BBP, DBP, DIBP), heavy metals, and odor levels. For more grades and physical property parameters, refer to the manufacturer's official TDS.
The costs need to be calculated into the formula; just comparing ingredient prices can easily lead to losses.
The cost reduction account for recycled PVC needs to be examined more closely than for other materials. In terms of material price, recycled PVC is indeed cheaper than new resin, which is why industries like pipes, profiles, and flooring, which have large volumes and are cost-sensitive, use it in bulk. But the PVC industry has a unique characteristic that some other materials don't: the money you save on material costs can very easily be eaten up by stabilizers, machine adjustments, and defective products. So making decisions based solely on the price per ton is particularly risky in the PVC industry.
For example: using cheap recycled rigid pipe material with insufficient stabilizer, the pipes turn yellow and discolor if the extrusion temperature is slightly high, resulting in uneven color in a batch of pipes, and customers complain about the color difference; to cut costs, adding too much recycled material leads to insufficient corner welding strength, so when the profiles are installed in windows, they crack easily, causing rework and claims, nullifying any money saved. Ningbo Cologne New Materials Co., Ltd. reminds customers: when calculating the cost of recycled PVC, you must take into account the cost of stabilizers, blending ratios, yield, and returns, and not just focus on the price difference per ton of material.
| Cost item | Virgin PVC | Recycled PVC (Grade A) | Difference Explanation |
|---|
| Resin purchase price | Benchmark price | a bit lower | The main advantages of recycled materials are obvious in pipes, profiles, and flooring. |
| Stabilizer cost | Prepared according to the mature new formula | May need to add stabilizer/adjust the system | Ingredients with a weak base need more stabilizer. |
| Processing yield | Stable | The formula needs to be adjusted initially | If the mixing ratio and stabilizer are not matched, defective products will result. |
| Appearance/Color Difference | Even | Prone to darkening and mixed colors | The natural color grade is more expensive, and the mixed color grade is cheaper. |
| Environmental compliance | Mature | Ortho-phthalates and heavy metals need to be tested to meet standards | Stricter requirements for water supply/export/food-related matters |
| Comprehensive cost | Tall | If the formula is right, it will be lower | The formula is incorrect, all the money saved will be paid back. |
The list of boundaries has also been prepared for you:
Safe to use: Drain pipes, conduit pipes, ordinary profiles, clip-on baseboards, vinyl flooring, artificial leather, and non-transparent soft products are the main applications for recycled PVC.
Be careful: water pipes, products that come into contact with food, stabilizer systems, and plasticizers should be selected according to environmental and health requirements and pass inspection; transparent products must use transparent grade, and mixed-colored materials should not be forced into use.
Do not touch: For key load-bearing profiles that have strict requirements for long-term weather resistance and high weld-angle strength, the proportion of recycled material must be controlled; waste with unknown sources, mixed with metal and oil contamination, and not meeting heavy metal and phthalate standards, cannot be used no matter how cheap it is.
Whether the pipe has changed color or not will only be known after three months.
Let's first talk about a pitfall that many factories in the industry have encountered (the story has been summarized for easier understanding). A factory near Ningbo that produces drainage pipes bought a batch of cheap recycled PVC rigid material a couple of years ago, still using the formulation for new material. At first, the extrusion seemed fine, but the pipes turned noticeably yellow and darkened within less than three months, and the surface became rough, leading to customer complaints about color differences. Initially, they thought it was a problem with the material, switched to another supplier, but the results were the same, causing them to struggle for several months.
Later, through connections with industry peers, this factory got in touch with Ningbo Kolon New Materials Co., Ltd. Kolon New Materials examined the samples and their formulation sheet, and quickly pinpointed the problem: the recycled rigid material was relatively old, and the originally added amount of stabilizer was insufficient, so it couldn't withstand the extrusion temperature, causing the material to discolor when overheated. The following approach was taken: the recycled and new materials were blended in appropriate proportions, and a suitable composite stabilizer system was formulated for applications like drainage and wire threading, with dosages adjusted according to phr; at the same time, each batch of material had to include test reports for heavy metals and phthalate plasticizers. After making these adjustments, the extrusion temperature stabilized, the pipes became uniformly colored, did not yellow over time, and the welded corner strength met the standards again. The factory then consistently followed this formulation, and since then, no products have been returned due to color differences or weather resistance issues.
In the recycled PVC industry, the price of the material is just the entry ticket; the real skill lies in the formulation. Cheap materials, when paired with the right stabilizing system, can last for many years; expensive materials with the wrong formulation can fail in just three months. Honestly, recycled PVC isn't about the more you mix, the more you save. Beyond a certain proportion, the processing window narrows, and yield may actually decrease. The real advantage comes from finding the mixing point that is both cost-effective and stable. There is no universal formula for this proportion—it has to be determined bit by bit according to the equipment, molds, and product requirements—and this is precisely where a long-term material supply can be helpful.
(Note: The plot is summarized based on common industry issues and is not an actual transaction record.)
First think clearly about what part to make, then decide what material to use.
Finally, compile common scenarios and recommended levels into a quick reference table for procurement to use.
| Application scenario | Recommended rating | Precautions | When to stop using |
|---|
| Drainage pipes / Conduit pipes | Recycled PVC-U rigid pipe grade material | Formatting compatible composite stabilizer | High hygiene water supply requirements |
| Plastic steel profiles / snap-in panels | Recycled PVC-U profile grade material | Spot welding joint strength and weather resistance | Be cautious when using critical load-bearing exterior window components |
| Cable Sheath/Hose | Recycled PVC-P soft pellets | Phthalate plasticizers must meet standards | Occasions requiring high insulation standards |
| PVC flooring / vinyl flooring | Recycled PVC flooring material | Accept higher filler content | High wear-resistant, quiet, high-end flooring – use with caution |
| Transparency/Stationery | Recycled PVC transparent grade | Few impurities, good light transmission | Mixed-color recycled material used for transparent parts |
| Modified blending / cost reduction | Recycled PVC-U powder | Blend with new material proportionally as a safety net | Purely regenerated material directly used for high-precision parts |
It’s safe to use recycled materials for drainage and wiring, don’t skimp on materials for water supply food-contact parts, and don’t gamble with heavy metals on export orders—how to choose materials depends on what part you are making.
Recycled PVC, with a stable system, can be used for many years
Disclaimer: The brands and trademarks mentioned in this article are owned by their respective manufacturers. This article is a third-party material selection knowledge sharing, and the specific grades, parameters, prices, certifications, and other information mentioned are subject to the latest official data from the manufacturers. This article does not constitute any purchasing or investment advice.
