——再生PA6/PA66应用、等级、性能、颜色与市场全参考（含2025-2026公开行情样本及GB/T 44392分级口径说明）
1 概述
1.1 什么是尼龙（聚酰胺）
尼龙（Nylon），学名聚酰胺（Polyamide，PA），是主链上含有酰胺键（—CO—NH—）的一类工程塑料。工业上最常见的两大品种：PA6（聚酰胺6/锦纶6），由己内酰胺开环聚合，熔点约220℃；PA66（聚酰胺66/尼龙66），由己二酸与己二胺缩聚，熔点约260℃。【网络查证/行业惯例】
尼龙的工程价值：强韧（拉伸强度高、耐冲击）、耐磨（自润滑、对金属摩擦系数低）、耐油耐化学、宽温可用（-40℃至长期使用100-120℃以上，PA66更高）。同时它是典型的吸湿性材料，吸水后尺寸与力学性能会变化，这是选型与加工必须考虑的天性。【网络查证/行业惯例】
再生尼龙指对聚酰胺废料——注塑水口料、不合格件、纺丝废丝、旧渔网、旧地毯、报废汽车尼龙件——进行分选、破碎、清洗、熔融过滤、造粒得到的再加工料；部分厂家进一步采用固相增粘（SSP）恢复黏度。因分子链在回收中降解，力学性能较原生料下降，但耐热、耐磨、耐化学等基本属性保留。【网络查证/行业惯例】
1.2 核心价值
再生尼龙的价值集中在四点：成本（价格显著低于原生料，2025年PA6/PA66废料回收行情约5000-7500元/吨区间，再生颗粒报价按等级差异大）；减碳（再生料碳足迹比原生树脂低约40%）；政策合规（欧盟ELV新规2032年新车型再生塑料≥15%、2036年≥25%，头部车企已将再生尼龙采购门槛提至≥15%质量占比）；性能保留（工程塑料里回收价值最高的品种之一）。【网络查证】
1.3 形态与体系分类
按基材体系分PA6/PA66/长链尼龙（PA11/PA12/PA46等）；按形态分注塑级、挤出级、纺丝级（纤维级）、增黏改性级；按增强分纯料与玻纤增强（GF15/GF30/GF40/GF50等）。下表汇总与选型直接相关的形态分类。【网络查证/行业惯例】
表 1 再生尼龙主要体系、形态与典型用途
| 体系/形态 | 特点 | 典型用途 |
|---|
| 再生PA6（注塑级） | 韧性好、易加工、价格友好 | 进气歧管、风扇、工具外壳、齿轮箱、日用品 |
| 再生PA66（注塑级） | 熔点约260℃、更刚更耐热 | 发动机周边件、连接器、断路器外壳、继电器底座 |
| 玻纤增强（GF15-50） | 强度、刚性、耐热大幅提升 | 结构件、承载件、电池壳体、线圈骨架 |
| 纺丝级/纤维级 | 对黏度要求高，高黏料 | 渔网回收再生、登山绳、地毯基布、速干衣 |
| 增黏改性级（SSP） | 固相增粘恢复黏度 | 笔记本外壳等高端注塑应用 |
| 阻燃/增韧/耐磨改性级 | 按改性方向定制 | 断路器（V-0）、工具卡扣、齿轮轴承座 |
2 应用领域与具体产品
再生尼龙的下游版图横跨汽车、电子电器、工业机械与纺织户外。2025年再生尼龙颗粒应用中，汽车领域约52.7亿元（占25.7%）、电子电器约48.2亿元（占23.5%）、电动工具与运动器材约31.6亿元（占15.4%）、其余（含纺织、家居、3D打印耗材等）约72.5亿元（占35.4%）。【网络查证（行业研究报告口径）】
2.1 汽车
汽车是再生尼龙最大的工程塑料战场。2023年中国汽车工业领域再生增强PA6消费量约18.5万吨，占全球总消费量约42.3%，其中发动机周边部件约6.2万吨、占汽车领域约33.5%。头部车企对再生尼龙6材料采购门槛已提至≥15%质量占比。【网络查证】
表 2 汽车领域具体产品与选材特征
| 序号 | 具体产品 | 再生尼龙价值点 / 选材特征 |
|---|
| 1 | 进气歧管 | PA6增强料为主，耐油、耐温、轻量化；再生增强PA6常用GF30 |
| 2 | 气门室盖/发动机罩盖 | PA66增强料，耐热260℃级、尺寸稳定 |
| 3 | 电池壳体/结构件 | 再生尼龙6工程料渗透快，要求阻燃与尺寸精度 |
| 4 | 门板骨架/后视镜壳体 | 再生尼龙6工程料2025年用量5.3万吨、同比+39.5% |
| 5 | 线束连接器 | PA66再生料，耐热、耐拔插、可追溯（IMDS） |
2.2 电子电器
电子电器按金额计是再生尼龙第二大应用领域。PA66再生料做连接器、线圈骨架、断路器外壳等，靠耐热、耐电弧、绝缘的老底子；电子件认证先行（UL黄卡、阻燃V-0、漏电起痕）。【网络查证】
表 3 电子电器领域具体产品与选材特征
| 序号 | 具体产品 | 再生尼龙价值点 / 选材特征 |
|---|
| 1 | 汽车/工业连接器 | PA66再生料，耐高温振动、拔插寿命长 |
| 2 | 线圈骨架/变压器骨架 | 绝缘、耐热、尺寸稳定 |
| 3 | 断路器外壳 | 无卤阻燃再生尼龙，UL94 V-0 |
| 4 | 继电器底座/传感器支架 | 耐电弧、尺寸精度高 |
| 5 | 电缆扎带/线束固定件 | 大批量、成本敏感，再生料渗透率高 |
2.3 工业机械与工具
工业方向取再生尼龙的耐磨、自润滑与抗冲击；电动工具、运动器材合计约31.6亿元（2025）。【网络查证】
表 4 工业机械与工具领域具体产品与选材特征
| 序号 | 具体产品 | 再生尼龙价值点 / 选材特征 |
|---|
| 1 | 齿轮/齿轮箱 | 耐磨、自润滑；再生增强料+增韧配方 |
| 2 | 轴承座/滑轮 | 自润滑、扛冲击 |
| 3 | 工具手柄/外壳 | 增韧再生PA6，跌落测试与耐候 |
| 4 | 泵阀配件 | 耐磨、耐化学；可掺PTFE/石墨自润滑 |
| 5 | 电动工具结构件 | GF30增强再生料，批次一致性要求高 |
2.4 纺织与户外
纺织是再生尼龙在金额口径下更大的消费场景（全球可再生尼龙市场纺织品服装约占50%）。纤维级再生对黏度要求极高，能把纤维级做稳的厂，工程料更不在话下。【网络查证】
表 5 纺织与户外领域具体产品与选材特征
| 序号 | 具体产品 | 再生尼龙价值点 / 选材特征 |
|---|
| 1 | 渔网回收再生 | PA6高黏再生料，做登山绳、工业绳网 |
| 2 | 泳衣/速干衣 | 再生锦纶纤维，品牌闭环回收需求大 |
| 3 | 地毯基布 | 旧地毯回收，量大 |
| 4 | 户外装备（背包/帐篷） | 再生尼龙面料，GRS认证常见 |
| 5 | 3D打印耗材 | 高黏再生PA6/PA12，新兴市场 |
3 行业等级体系
再生聚酰胺分级已出台国标口径：GB/T 44392-2025对再生聚酰胺给出分级指标（A/B/C级，以灰分、金属杂质等为限值）；行业同时沿用来源（PIR/PCR）、玻纤含量、改性方向、颜色等维度定价。原生尼龙牌号体系（如巴斯夫Ultramid、杜邦Zytel、兰蒂奇等）作为再生料对标性能的参照。【网络查证（标准名称以正式发布文本为准）】
表 6 再生尼龙行业等级体系总览
| 分级维度 | 具体等级 / 指标 | 说明 |
|---|
| 标准分级（GB/T 44392-2025） | A级灰分≤0.3%、金属杂质≤50ppm；B级灰分≤0.6%、金属杂质≤120ppm；C级灰分≤1.2%、金属杂质≤300ppm | 再生聚酰胺分级国标口径，具体以标准原文为准 |
| 来源分级 | PIR（工业回收料）/ PCR（消费后回收料） | PIR水口料干净批次稳；全球再生PA6料源PCR约占58.7% |
| 黏度分级 | 相对黏数（ηrel）2.2-2.7为原生PA66常见区间；再生料明显下降 | 黏数是聚合度最硬指标，跌到2.0以下基本只能做低端件 |
| 玻纤分级 | GF15/GF30/GF40/GF50；长度保留率≥65%（中档料） | 再生料GF30为绝对主力 |
| 改性分级 | 增强/阻燃（无卤V-0）/增韧（超韧）/耐磨（PTFE石墨） | 改性方向决定身价 |
| 颜色分级 | 黑色/本色/白色/灰蓝 | 黑色盖杂质量大价低；本色白色金贵 |
| 原生对标牌号（参照） | Ultramid（巴斯夫）、Zytel（杜邦）、Leona（旭化成）、DURETHAN（朗盛）等 | 再生料以原生牌号为性能对标，非同一体系 |
4 性能指标
4.1 原生尼龙典型性能值
下表为原生PA6/PA66增强料与纯料的行业通用典型区间，综合多份厂商TDS整理；不同牌号、测试条件存在差异。【网络查证】
表 7 原生尼龙典型性能值（多份TDS综合）
| 性能项目 | 原生PA6（增强GF30） | 原生PA66（增强GF30） | 备注 |
|---|
| 拉伸强度 | 约140-170 MPa | 约160-190 MPa | 纯料约60-80 MPa |
| 弯曲强度 | 约200-230 MPa | 约240-280 MPa | — |
| 热变形温度（1.8MPa） | 约200-210℃ | 约230-250℃ | 熔点PA6约220℃/PA66约260℃ |
| 悬臂梁缺口冲击 | 约10-16 kJ/m² | 约9-14 kJ/m² | 增韧级更高 |
| 吸水率（24h） | 约1.3-1.8% | 约1.0-1.5% | 饱和吸水PA6约9%、PA66约8% |
| 密度 | 约1.35-1.40 g/cm³ | 约1.35-1.40 g/cm³ | GF30增强典型 |
| 摩擦系数（对钢） | 约0.2-0.4 | 约0.2-0.4 | 自润滑，耐磨性好 |
4.2 原生与再生性能对比
再生尼龙因破碎、熔融、造粒多道热历史，力学性能较原生下降约10%-30%；再生增强PA6拉伸可做到60MPa以上（原生约70MPa口径下）。但耐热、耐磨、耐化学等“看家本领”保留。【网络查证】
表 8 原生与再生尼龙性能变化（典型值）
| 性能指标 | 原生PA6增强 | 再生PA6增强（典型） | 说明 |
|---|
| 拉伸强度 | 约70-170 MPa（按增强） | 降低10%-30%，增强料仍可≥60 MPa | 黏数与玻纤长度决定降幅 |
| 冲击强度 | 良好 | 下降，可增韧改性找回 | 超韧级可接近原生 |
| 相对黏数 | PA66约2.2-2.7 | 明显下降，需SSP增黏回补 | 黏数是聚合度证据 |
| 吸水率 | 高（天性） | 不变（天性） | 制品需调湿处理 |
| 耐热/耐化学/耐磨 | 优秀 | 基本保留 | 看家本领不随回收消失 |
| 表面质量 | 细腻 | 易玻纤外露、色泽不均 | 浅色外观件挑料 |
4.3 再生降幅机理与使用边界
表 9 再生尼龙性能降幅机理与使用边界
| 变化维度 | 再生后表现与成因 |
|---|
| 分子链降解 | 热氧+水解使酰胺键断裂，黏数下降，拉伸/冲击随之下滑 |
| 玻纤断裂 | 破碎与螺杆剪切使玻纤变短，增强效果打折、表面易外露白痕 |
| 吸水与尺寸 | 吸湿天性不变，吸湿后尺寸与强度变化，精密件必须调湿 |
| 颜色加深 | 反复受热热氧变色：本色→黄→棕→深色，浅色料稀缺 |
| 杂质残留 | 清洗/过滤不到位则黑点、气泡、断条，灰分波动大 |
| 使用边界 | 按降幅落点选应用：低负载件可直接用；结构/外观/认证件选A级+增黏料 |
4.4 按用途与改性分级
表 10 按用途与改性分级的性能/加工特点
| 分级方向 | 典型规格 | 性能/加工特点 | 典型应用 |
|---|
| 玻纤增强级 | GF15/GF30/GF40/GF50 | 强度刚性提升，越刚越脆 | 结构件、承载件 |
| 阻燃级 | 无卤阻燃（灰分8%-20%） | UL94 V-0 | 断路器、继电器、线圈骨架 |
| 增韧级 | 超韧改性 | 冲击大幅提升 | 工具外壳、卡扣、运动器材 |
| 耐磨级 | 掺PTFE/石墨 | 自润滑、低摩擦 | 齿轮、轴承座、泵阀 |
| 高黏/增黏级 | SSP固相增粘 | 黏数回补，性能接近原生 | 笔记本外壳、高端注塑件 |
5 颜色体系
再生尼龙颜色基本是明码标价表：黑色最便宜、量大料足，把杂色全盖住；本色、白色最金贵，要靠高纯度分选与本色水口料；灰色、蓝色各有主场。颜色加深的机理是加工温度高、反复受热导致热氧变色（本色→黄→棕→深），浅色基体难以保住。【行业惯例】
表 11 再生尼龙颜色体系与品级倾向
| 颜色/品级 | 原生表现 | 再生后变化 | 用途倾向 |
|---|
| 黑色 | 黑色料 | 黑色盖杂质、量最大 | 托盘、非外观结构件、工业件 |
| 本色/白色 | 本色米白 | 稀缺，需本色水口料+高纯度分选 | 家电外壳、浅色外观件，价高 |
| 灰色/蓝色 | 按客户配色 | 批次色差需控ΔE | 周转箱、特定外观件 |
| 灰黄/杂色料 | — | 色差ΔE大，上机翻车高发 | 低端内件，慎做外观 |
选料顺序：先问颜色，再谈价格。颜色谈不拢，价格再低都是白搭。【行业惯例】
6 市场与趋势
6.1 公开行情样本（2025-2026，多源）
以下为公开渠道行情样本，非统一口径，仅作量级参考：PA6尼龙废料约5000-6000元/吨、PA66约6000-7000元/吨、增强尼龙废料约3500-4500元/吨（2025-07）；废塑料回收PA约5800-7500元/吨（2026-09）；PA6尼龙GF30水口抽再生料约10100元/吨含税（2026-08）；PA66加纤/回收类约9200元/吨挂牌（2026-09）。【网络查证/待核实】
表 12 再生尼龙公开行情样本（元/吨，多源）
| 项目 | 行情样本 | 来源时间 |
|---|
| PA6废料回收 | 约5000-6000 | 2025-07 |
| PA66废料回收 | 约6000-7000 | 2025-07 |
| 增强尼龙废料 | 约3500-4500 | 2025-07 |
| 废塑料PA（回收） | 约5800-7500 | 2026-09 |
| PA6 GF30再生颗粒 | 约10100（含税） | 2026-08 |
| PA66加纤/回收挂牌 | 约9200 | 2026-09 |
注：以上为公开行情样本，口径（含税/不含税、等级、地区）不统一，正式报价以供应商当日实际为准。【待核实】
6.2 产能格局
中国是再生聚酰胺重要生产与消费国。行业研究数据显示，2025年头部企业出货量：浙江佳人新材料约3.21万吨（约占全国12.8%）、江苏瑞美福约2.86万吨（约占11.4%），据此反推全国总产量约25万吨量级（口径待核实）。【网络查证/待核实】
表 13 国内再生聚酰胺头部企业（吨/年，多源交叉，口径待核实）
| 企业 | 2025年再生聚酰胺出货（约） | 备注 |
|---|
| 浙江佳人新材料 | 约3.21万吨（约占12.8%） | 拥有国内唯一的PA6化学解聚中试线，与全球头部纺织品牌闭环回收合作 |
| 江苏瑞美福 | 约2.86万吨（约占11.4%） | — |
| 全国总产量（反推） | 约25万吨量级 | 按头部份额反推，口径待核实 |
原生PA6/PA66改性端格局（参照）：国内汽车配件用PA6工程塑料市场五强（神马股份、金发科技、南京聚隆、中广核俊尔、道恩集团）2025年合计约占63.8%；神马股份具全产业链优势，金发科技在新能源汽车电池壳体、连接器等新兴应用突破。【网络查证】
6.3 价格对比
再生尼龙相对原生料的价格优势来自省去聚合环节：废料回收价约5000-7500元/吨，再生增强颗粒按等级约9000-12000元/吨区间；原生PA6/PA66基料及增强改性料价格更高，具体以当日市场报价为准。等级与改性方向是价差主因（普通黑料与本色高纯料可差数倍）。【网络查证/待核实】
6.4 政策法规
欧盟ELV新规（EU）2026/1738（2026年8月13日生效）：2028年9月1日后新型式认证车辆、2032年9月1日起新车型整车塑料再生含量≥15%；2036年起≥25%，其中至少20%须来自报废车闭环回收塑料。另有公开报道称欧盟2026年推进乘用车塑料零部件PCR含量要求及跨国溯源，口径以官方文本为准。【网络查证】
国内：头部车企（上汽、比亚迪、宁德时代）将再生尼龙6采购门槛提至≥15%质量占比；车用再生塑料比例要求逐步落地。【网络查证】
食品接触：尼龙树脂食品接触条款以FDA 21 CFR 177.1500（Nylon resins）为主要依据；再生尼龙用于食品接触需按挑战性测试与合规评估执行，实际应用以纺织与工业为主。【网络查证/待核实】
6.5 减排数据
行业公开口径：含再生聚酰胺的配方相对原生树脂碳足迹可降低约40%（综合配方/替代比例测算）；物理回收省去聚合环节能耗，具体减排效益需结合替代比例与应用场景测算。【网络查证（厂商/行业资料）】
6.6 东南亚进口渠道与料源背景
越南、泰国、马来西亚是再生尼龙料源的重要供应地：越南胡志明有面向全球的PA与PP再生颗粒定制改性工厂（如新义忠国际，占地约2万方）；泰国曼谷有月供百吨级的PA66再生颗粒厂商；马来西亚有企业投产PA66汽车安全气囊树脂再生生产线（6条线，单基地年产能约1.2万吨）。【网络查证/待核实】
风险与待核实：东南亚尼龙废料常与PA6/PA66/长链尼龙及填充料混杂，分选难度大；进口料需核实海关归类（HS 3908项下）、巴塞尔公约口径与原产地规则；货量、纯度与关税需逐项核实，并以实地/贸易商渠道确认。【待核实】
7 系列文章写作切入建议
围绕再生尼龙可按以下6个主题切入系列文章，兼顾选材、成本、加工、认证与料源视角：
表 14 再生尼龙系列文章主题与切入点
| 序号 | 系列文章主题 | 切入点 |
|---|
| 1 | 再生尼龙的应用版图：发动机盖、连接器、登山绳 | 汽车/电子/工业/纺织四大版图，市场数据与选料逻辑 |
| 2 | 再生尼龙是什么：PIR/PCR、SSP增黏与化学回收 | 定义、体系分类、工艺链、固相增粘与化学回收路线 |
| 3 | 再生尼龙等级怎么选：GB/T 44392 A/B/C级 | 灰分、黏数、玻纤三把尺子，来源定等级 |
| 4 | 再生尼龙性能与颜色：黏数、吸水率与颜色体系 | 降解机理、干燥调湿、阻燃耐温保留、颜色标价 |
| 5 | 汽车、电子、工业机械三大主战场 | 三战场选料逻辑：汽车要证、电子要稳、工业要磨 |
| 6 | 汽车级认证门槛与料源保障：ELV与IMDS | 法规时间线、主机厂门槛、闭环回收、东南亚直采 |
8 资料来源
市场与政策：Dataintelo（再生PA6 2025约7亿美元、CAGR约8.2%；再生PA66 2025约9.7亿美元、CAGR约9.2%；汽车占比35-38.5%、亚太约42.3%、PCR占再生PA6料源约58.7%）。【网络查证】
汽车用材：豆丁/博研咨询等行业研究报告（2023年中国汽车再生增强PA6消费18.5万吨、占全球42.3%、发动机周边6.2万吨占33.5%；2025年再生尼龙6工程料5.3万吨、同比+39.5%；头部车企采购门槛≥15%）。【网络查证/待核实】
应用结构：行业研究报告（2025年再生尼龙颗粒：电子48.2亿/汽车52.7亿/工具与运动31.6亿/其余72.5亿元）。【网络查证/待核实】
分级标准：GB/T 44392-2025（再生聚酰胺分级A/B/C级灰分≤0.3%/0.6%/1.2%、金属杂质≤50/120/300ppm）；标准名称与条款以正式发布文本为准。【网络查证/待核实】
黏度与增粘：专利与行业资料（再生PA66相对黏度2.2-2.7、灰分≤0.5%；伟星新材V-RENYL®N6R经SSP将特性黏度2.1→2.8 dL/g）。【网络查证】
性能：易再生网商品规格、亿荟塑胶PA6资料（原生PA6拉伸约70MPa口径、再生增强可≥60MPa）；Patsnap（再生聚酰胺配方减碳约40%）。【网络查证】
产能格局：豆丁行业研究报告（佳人3.21万吨/12.8%、瑞美福2.86万吨/11.4%）；原生五强份额（神马21.4%、金发18.9%等，汽车PA6口径）。【网络查证/待核实】
价格：1688（PA66加纤/回收约9200元/吨）、抖音回收行情（PA6废料5000-6000、PA66废料6000-7000、增强尼龙3500-4500、废塑料PA 5800-7500）、PA6 GF30再生料约10100元/吨。口径不统一，仅作量级参考。【网络查证/待核实】
政策：欧盟ELV（EU）2026/1738（2026-08-13生效；2032/9/1新车型≥15%、2036年≥25%、≥20%闭环）；中国汽研、西美咨询、浦巍咨询等解读。【网络查证】
东南亚料源：越南新义忠国际、泰国TradeKey PA66再生颗粒厂商、中鑫宏伟马来西亚基地（PA66安全气囊树脂再生线6条、年产能约1.2万吨）。【网络查证/待核实】
FDA：21 CFR 177.1500（Nylon resins）为尼龙食品接触条款参考。【网络查证/待核实】
注：标注“待核实”的数字来自网络二手报道、行业研究报告或单一来源，正式对外引用前建议以厂商数据表、上市公司公告与官方标准原文二次确认。
——Comprehensive Reference for Recycled PA6/PA66 Applications, Grades, Performance, Colors, and Market (Including 2025-2026 Public Market Samples and GB/T 44392 Grading Criteria Explanation)
1 Overview
1.1 What is Nylon (Polyamide)
Nylon, scientifically known as Polyamide (PA), is a type of engineering plastic whose main chain contains amide bonds (—CO—NH—). The two most common industrial varieties are: PA6 (Polyamide 6/Nylon 6), which is produced by the ring-opening polymerization of caprolactam, with a melting point of about 220°C; and PA66 (Polyamide 66/Nylon 66), which is produced by the condensation of adipic acid and hexamethylenediamine, with a melting point of about 260°C. [Online verification/industry practice]
Engineering value of nylon: strong and tough (high tensile strength, impact-resistant), wear-resistant (self-lubricating, low coefficient of friction with metals), oil and chemical resistant, usable over a wide temperature range (-40℃ to long-term use above 100-120℃, higher for PA66). At the same time, it is a typical hygroscopic material, and its dimensions and mechanical properties will change after absorbing water, which is a nature that must be considered for selection and processing. [Online verification/industry practice]
Recycled nylon refers to reprocessed material obtained by sorting, crushing, washing, melting and filtering, and granulating polyamide waste—such as injection molding sprues, defective parts, spinning waste, old fishing nets, old carpets, and scrapped automotive nylon parts; some manufacturers further use solid-state polymerization (SSP) to restore viscosity. Due to molecular chain degradation during recycling, mechanical properties are lower than those of virgin material, but basic properties such as heat resistance, wear resistance, and chemical resistance are retained. [Online verification/industry practice]
1.2 Core Values
The value of recycled nylon focuses on four points: cost (the price is significantly lower than that of virgin material; in 2025, the recycling market price for PA6/PA66 waste is around 5,000-7,500 RMB per ton, with recycled pellets quoted differently depending on grade); carbon reduction (the carbon footprint of recycled material is about 40% lower than that of virgin resin); policy compliance (EU ELV regulations require that by 2032, new vehicles must contain ≥15% recycled plastic, increasing to ≥25% by 2036, and leading automakers have raised the procurement threshold for recycled nylon to ≥15% by weight); and performance retention (one of the highest-value recycled varieties among engineering plastics). [Online verification]
1.3 Morphology and System Classification
Classified by base material system: PA6/PA66/long-chain nylons (PA11/PA12/PA46, etc.); classified by form: injection molding grade, extrusion grade, spinning grade (fiber grade), viscosity-modified grade; classified by reinforcement: unfilled and glass fiber reinforced (GF15/GF30/GF40/GF50, etc.). The table below summarizes the form classifications directly related to selection. [Online verification/industry practice]
Table 1 Main Systems, Forms, and Typical Uses of Recycled Nylon
| System/Form | Characteristics | Typical uses |
|---|
| Recycled PA6 (injection molding grade) | Good toughness, easy to process, budget-friendly | Intake manifold, fan, tool housing, gearbox, daily necessities |
| Recycled PA66 (injection molding grade) | Melting point about 260°C, harder and more heat-resistant | Engine peripheral components, connectors, circuit breaker housings, relay bases |
| Glass Fiber Reinforced (GF15-50) | Significant improvement in strength, rigidity, and heat resistance | Structural parts, load-bearing parts, battery casing, coil skeleton |
| Spinning grade / Fiber grade | High viscosity requirement, high viscosity material | Recycled fishing nets, climbing ropes, carpet backing, quick-drying clothing |
| Tackifying Modification Grade (SSP) | Solid-phase thickening restores viscosity | High-end injection molding applications such as notebook casings |
| Flame Retardant/Toughened/Wear-Resistant Modified Grade | Customized according to modification direction | Circuit breaker (V-0), tool buckle, gear bearing seat |
2 Application Areas and Specific Products
The downstream landscape of recycled nylon spans automobiles, electronics and electrical appliances, industrial machinery, and textile outdoor products. In 2025, the application of recycled nylon pellets is projected to be approximately 5.27 billion yuan in the automotive sector (25.7%), about 4.82 billion yuan in electronics and electrical appliances (23.5%), around 3.16 billion yuan in power tools and sports equipment (15.4%), and roughly 7.25 billion yuan in other areas (including textiles, home products, 3D printing materials, etc.) (35.4%). [Online verification (industry research report standard)]
2.1 Car
Automobiles are the biggest engineering plastics battlefield for recycled nylon. In 2023, the consumption of recycled reinforced PA6 in China's automotive industry was about 185,000 tons, accounting for approximately 42.3% of the global total consumption, of which engine peripheral components accounted for about 62,000 tons, or about 33.5% of the automotive sector. Leading car companies have raised the procurement threshold for recycled nylon 6 materials to ≥15% by weight. [Online verification]
Table 2 Specific Products and Material Selection Features in the Automotive Field
| Serial Number | Specific product | Recycled Nylon Value Points / Material Selection Features |
|---|
| One | Intake manifold | Mainly PA6 reinforced material, oil-resistant, temperature-resistant, lightweight; recycled reinforced PA6 commonly uses GF30 |
| Two | Valve Cover / Engine Cover | PA66 reinforced material, heat-resistant up to 260℃, dimensionally stable |
| Three | Battery housing/structural parts | Recycled Nylon 6 engineering material penetrates quickly, requiring flame retardancy and dimensional accuracy |
| Four | Door panel frame / rearview mirror housing | The consumption of recycled Nylon 6 engineering material in 2025 is 53,000 tons, a year-on-year increase of 39.5% |
| Five | Wiring harness connector | PA66 recycled material, heat-resistant, plug-in resistant, traceable (IMDS) |
2.2 Electronics and Electrical Appliances
Electronics and electrical appliances are the second largest application field for recycled nylon in terms of value. PA66 recycled material is used to make connectors, coil bobbins, circuit breaker housings, etc., relying on its established properties of heat resistance, arc resistance, and insulation; electronic component certification comes first (UL Yellow Card, flame retardant V-0, tracking resistance). [Online verification]
Table 3 Specific Products and Material Selection Characteristics in the Electronics and Electrical Appliances Field
| Serial Number | Specific product | Recycled Nylon Value Points / Material Selection Features |
|---|
| One | Automotive/Industrial Connector | PA66 recycled material, high temperature resistance, vibration resistance, long insertion and extraction life |
| Two | Coil core/Transformer core | Insulation, heat resistance, dimensional stability |
| Three | Circuit breaker casing | Halogen-free flame-retardant recycled nylon, UL94 V-0 |
| Four | Relay Base/Sensor Bracket | Arc-resistant, high dimensional accuracy |
| Five | Cable Ties/Wire Harness Fasteners | Large volumes, cost-sensitive, high penetration of recycled materials |
2.3 Industrial Machinery and Tools
The industrial sector focuses on the wear resistance, self-lubrication, and impact resistance of recycled nylon; power tools and sports equipment amount to about 3.16 billion yuan (2025). [Online verification]
Table 4 Specific Products and Material Selection Characteristics in the Field of Industrial Machinery and Tools
| Serial Number | Specific products | Recycled Nylon Value Points / Material Selection Features |
|---|
| One | Gear/Gearbox | Wear-resistant, self-lubricating; recycled reinforced material toughening formula |
| Two | Bearing housing / pulley | Self-lubricating, impact-resistant |
| Three | Tool handle/casing | Toughened recycled PA6, drop test and weather resistance |
| Four | Pump and valve accessories | Wear-resistant, chemical-resistant; can be blended with PTFE/graphite for self-lubrication |
| Five | Electric tool structural components | GF30 reinforced recycled material, high batch consistency required |
2.4 Textiles and Outdoors
Textiles are a larger consumption scenario for recycled nylon in terms of monetary scale (textiles and apparel account for about 50% of the global recycled nylon market). Fiber-grade recycled nylon has extremely high viscosity requirements; manufacturers who can stabilize fiber-grade production can easily handle engineering materials. [Online verification]
Table 5 Specific Products and Material Selection Characteristics in the Textile and Outdoor Fields
| Serial Number | Specific product | Recycled Nylon Value Points / Material Selection Features |
|---|
| One | Fishing Net Recycling and Regeneration | PA6 high-viscosity recycled material, used for climbing ropes and industrial rope nets |
| Two | Swimsuit/Quick-dry clothing | Recycled nylon fiber, high demand for brand closed-loop recycling |
| Three | Carpet backing fabric | Old carpet recycling, large quantity |
| Four | Outdoor Equipment (Backpack/Tent) | Recycled nylon fabric, commonly GRS certified |
| Five | 3D printing materials | High-viscosity recycled PA6/PA12, emerging markets |
3 Industry Classification System
A national standard for the classification of recycled polyamide has been issued: GB/T 44392-2025 provides classification indicators (Grade A/B/C, with limits on ash content, metal impurities, etc.) for recycled polyamide; the industry also continues to price based on source (PIR/PCR), glass fiber content, modification direction, color, and other dimensions. The brand grade system of virgin nylon (such as BASF Ultramid, DuPont Zytel, Lanxess, etc.) serves as a reference for benchmarking the performance of recycled materials. [Online verification (the standard name is subject to the officially published text)]
Table 6 Overview of the Grading System in the Recycled Nylon Industry
| Hierarchical Dimension | Specific Level / Indicator | Explanation |
|---|
| Standard Classification (GB/T 44392-2025) | Grade A ash ≤0.3%, metal impurities ≤50ppm; Grade B ash ≤0.6%, metal impurities ≤120ppm; Grade C ash ≤1.2%, metal impurities ≤300ppm | Grading of recycled polyamide according to national standards; the specifics shall be based on the original text of the standard. |
| Source Classification | PIR (Post-Industrial Recycled Material) / PCR (Post-Consumer Recycled Material) | PIR water inlet material batched clean and stable; global recycled PA6 material source PCR accounts for about 58.7% |
| Viscosity grading | Relative viscosity (ηrel) 2.2-2.7 is a common range for virgin PA66; it drops significantly for recycled material | Viscosity is the most rigid indicator of polymerization degree; if it drops below 2.0, it can basically only be used for low-end products. |
| Glass Fiber Classification | GF15/GF30/GF40/GF50; length retention rate ≥65% (medium-grade material) | Recycled material GF30 is the absolute mainstay |
| Modified grading | Enhanced / Flame Retardant (Halogen-free V-0) / Toughened (Super Tough) / Wear-resistant (PTFE Graphite) | The direction of modification determines one's value |
| Color grading | Black/Natural/White/Gray Blue | Black cover is of mixed quality, large quantity, and low price; natural white is precious like gold. |
| Native reference to grade (reference) | Ultramid (BASF), Zytel (DuPont), Leona (Asahi Kasei), DURETHAN (Lanxess), etc. | Recycled materials are benchmarked against the performance of virgin grades, not of the same system. |
4 Performance Indicators
4.1 Typical Properties of Virgin Nylon
The table below shows the industry common typical ranges for virgin PA6/PA66 reinforced materials and neat materials, compiled from multiple manufacturers' TDS; differences exist depending on grade and test conditions. [Internet verification]
Table 7 Typical Properties of Virgin Nylon (Compiled from Multiple TDS)
| Performance items | Native PA6 (reinforced with GF30) | Virgin PA66 (Glass Fiber 30% Reinforced) | Remarks |
|---|
| Tensile strength | About 140-170 MPa | Approximately 160-190 MPa | Pure material about 60-80 MPa |
| Bending strength | About 200-230 MPa | About 240-280 MPa | — |
| Heat deflection temperature (1.8 MPa) | About 200-210°C | About 230-250°C | The melting point of PA6 is about 220°C / PA66 is about 260°C |
| Cantilever beam notch impact | Approximately 10-16 kJ/m² | Approximately 9-14 kJ/m² | Higher toughening grade |
| Water absorption rate (24h) | About 1.3-1.8% | About 1.0-1.5% | Saturated water absorption: PA6 about 9%, PA66 about 8% |
| Density | Approximately 1.35-1.40 g/cm³ | Approximately 1.35-1.40 g/cm³ | GF30 Reinforced Typical |
| Coefficient of friction (against steel) | Approximately 0.2-0.4 | Approximately 0.2-0.4 | Self-lubricating, good wear resistance |
4.2 Comparison of Native and Regenerative Performance
Recycled nylon experiences multiple thermal histories due to crushing, melting, and pelletizing, resulting in a decrease in mechanical properties by about 10%-30% compared to virgin material; recycled reinforced PA6 can achieve a tensile strength of over 60 MPa (about 70 MPa for virgin under the same caliber). However, its signature properties such as heat resistance, wear resistance, and chemical resistance are retained. [Verified from online sources]
Table 8 Performance Changes of Virgin and Recycled Nylon (Typical Values)
| Performance indicators | Native PA6 Reinforced | Recycled PA6 Reinforced (Typical) | Explanation |
|---|
| Tensile strength | Approximately 70-170 MPa (depending on reinforcement) | Reduce by 10%-30%, reinforced material can still be ≥60 MPa | Adhesion number and glass fiber length determine the reduction |
| Impact strength | Good | Decline, can recover by toughening modification | Super tough grade, can approach native |
| Relative viscosity | PA66 approximately 2.2-2.7 | Significant decrease, SSP needs increased viscosity replenishment | Viscosity is evidence of the degree of polymerization |
| Water absorption rate | Tall (natural disposition) | Unchanging (nature) | The product needs moisture conditioning |
| Heat-resistant / Chemical-resistant / Wear-resistant | Excellent | Basically preserved | A signature skill does not disappear with recycling |
| Surface quality | Delicate | Prone to glass fiber exposure, uneven color | Selection of light-colored exterior parts |
4.3 Mechanism of Regeneration Attenuation and Usage Boundaries
Table 9 Mechanism of Performance Decline and Usage Limits of Recycled Nylon
| Dimension of change | Performance and Causes After Regeneration |
|---|
| Molecular chain degradation | Thermo-oxidative hydrolysis causes the amide bonds to break, the viscosity decreases, and the tensile/impact strength subsequently declines. |
| Fiberglass fracture | Fracturing and screw shearing shorten the glass fibers, reducing the reinforcement effect and making the surface prone to visible white marks. |
| Water Absorption and Size | The hygroscopic nature does not change, and the size and strength change after moisture absorption, so precision parts must be conditioned for humidity. |
| Color deepening | Repeated heating and thermal oxidation discoloration: original color → yellow → brown → dark color, light-colored material is scarce |
| Residual impurities | If washing/filtration is inadequate, there will be black spots, bubbles, broken strips, and large fluctuations in ash content |
| Use border | Select applications according to the drop in range: low-load parts can be used directly; structure/appearance/certification parts should use Grade A adhesive enhancer |
4.4 Classification by Use and Modification
Table 10 Performance/Processing Characteristics Classified by Application and Modification
| Grading direction | Typical specifications | Performance/Processing Characteristics | Typical Applications |
|---|
| Glass fiber reinforced grade | GF15/GF30/GF40/GF50 | Strength and rigidity increase; the more rigid, the more brittle. | Structural components, load-bearing components |
| Flame retardant grade | Halogen-free flame retardant (ash content 8%-20%) | UL94 V-0 | Circuit breakers, relays, coil frames |
| Toughened grade | Super-tough modification | Significant impact increase | Tool casing, clips, sports equipment |
| wear-resistant grade | Blended PTFE/graphite | Self-lubricating, low friction | Gears, bearing housings, pump valves |
| High Viscosity / Adhesion Enhancement Grade | SSP solid-phase thickening | Stick multiple times to refill, performance close to native | Laptop casing, high-end injection molded parts |
5 Color System
The colors of recycled nylon are basically listed with clear prices: black is the cheapest, with large quantities available, covering all mixed colors; natural color and white are the most valuable, relying on high-purity sorting and natural-colored sprue material; gray and blue each have their own main applications. The mechanism for color darkening is that high processing temperatures and repeated heating cause thermal oxidation discoloration (natural color → yellow → brown → dark), and it is difficult for light-colored bases to remain intact. [Industry practice]
Table 11 Color System and Grade Trends of Recycled Nylon
| Color/Grade | Native performance | Changes after regeneration | Usage tendency |
|---|
| Black | Black material | Black cap impurities, largest quantity | Pallets, non-appearance structural parts, industrial parts |
| Natural/White | Natural off-white | Scarce, requires raw water mouth material, high purity sorting | Home appliance shells, light-colored exterior parts, high price |
| Gray/Blue | According to the customer's color scheme | Batch color difference needs to control ΔE | Turnover boxes, specific exterior parts |
| Grayish-yellow / mixed color material | — | Large color difference ΔE, high incidence of production errors | Low-end interior parts, be cautious with appearance |
Material selection order: First ask about the color, then talk about the price. If the color can't be agreed on, no matter how low the price is, it's useless. [Industry practice]
6 Market and Trends
6.1 Public Market Sample (2025-2026, Multi-source)
The following are sample market prices from public sources, not standardized, for reference only: PA6 nylon scrap about 5,000-6,000 RMB/ton, PA66 about 6,000-7,000 RMB/ton, reinforced nylon scrap about 3,500-4,500 RMB/ton (July 2025); recycled PA from waste plastics about 5,800-7,500 RMB/ton (September 2026); PA6 nylon GF30 sprue regrind about 10,100 RMB/ton including tax (August 2026); PA66 fiber-reinforced/recycled type about 9,200 RMB/ton listed (September 2026). [Online verification/pending confirmation]
Table 12 Sample Prices of Recycled Nylon (Yuan/Ton, Multiple Sources)
| Project | Market Sample | Source Time |
|---|
| PA6 Waste Recycling | About 5000-6000 | 2025-07 |
| PA66 Waste Recycling | About 6000-7000 | 2025-07 |
| Reinforced nylon waste | About 3500-4500 | 2025-07 |
| Waste plastic PA (recycled) | About 5800-7500 | 2026-09 |
| PA6 GF30 recycled pellets | Approximately 10,100 (including tax) | 2026-08 |
| PA66 Glass-Filled/Recycled Label | About 9200 | 2026-09 |
Note: The above are public market samples, with inconsistent specifications (including tax/excluding tax, grade, region). The official quotation shall be based on the supplier's actual price on the day. [To be verified]
6.2 Production Capacity Pattern
China is an important producer and consumer of recycled polyamide. Industry research data shows that the shipment volume of leading companies in 2025: Zhejiang Jiaren New Materials is about 32,100 tons (approximately 12.8% of the national total), Jiangsu Ruimeifu is about 28,600 tons (approximately 11.4%). Based on this, the total national production is inferred to be around 250,000 tons (figures to be verified). [Online verification/to be confirmed]
Table 13 Leading Domestic Recycled Polyamide Companies (tons/year, multiple sources, figures to be verified)
| Enterprise | 2025 recycled polyamide shipments (approximate) | Remarks |
|---|
| Zhejiang Jiaren New Materials | Approximately 32,100 tons (about 12.8%) | Possesses the only domestic PA6 chemical depolymerization pilot line and collaborates on closed-loop recycling with leading global textile brands |
| Jiangsu Ruimeifu | Approximately 28,600 tons (about 11.4%) | — |
| National total output (reverse calculation) | About 250,000 tons | Based on the headshare estimate, the caliber needs to be verified |
Native PA6/PA66 modified end pattern (for reference): The top five domestic automotive parts PA6 engineering plastics market leaders (Shenma Co., Kingfa Technology, Nanjing Julong, CGN Juner, Dawn Group) are expected to account for about 63.8% of the total by 2025; Shenma Co. has advantages across the entire industry chain, and Kingfa Technology has breakthroughs in emerging applications such as new energy vehicle battery housings and connectors. [Online verification]
6.3 Price Comparison
The price advantage of recycled nylon compared to virgin materials comes from skipping the polymerization process: the price of recycled waste is about 5,000–7,500 yuan/ton, while recycled reinforced pellets range from about 9,000–12,000 yuan/ton depending on the grade; the price of virgin PA6/PA66 base materials and reinforced modified materials is higher, with specific prices based on the current market quotation. Grade and modification type are the main reasons for the price difference (ordinary black material and natural high-purity material can differ by several times). [Online verification/pending confirmation]
6.4 Policies and Regulations
EU ELV New Regulation (EU) 2026/1738 (effective August 13, 2026): From September 1, 2028, new type-approved vehicles, and from September 1, 2032, new vehicle models must have a minimum of 15% recycled content in plastics; from 2036, this requirement increases to ≥25%, of which at least 20% must come from closed-loop recycled plastics from end-of-life vehicles. There are also public reports that the EU will promote requirements for PCR content in passenger car plastic components and cross-border traceability by 2026, with the official text taking precedence. [Online verification]
Domestic: Leading car companies (SAIC, BYD, CATL) have raised the procurement threshold for recycled Nylon 6 to ≥15% by weight; requirements for the proportion of recycled plastics used in vehicles are gradually being implemented. [Online verification]
Food Contact: Nylon resin food contact provisions are mainly based on FDA 21 CFR 177.1500 (Nylon resins); recycled nylon used for food contact needs to be carried out according to challenge testing and compliance assessment, with actual applications mainly in textiles and industry. [Online verification / To be verified]
6.5 Emission Reduction Data
Industry public statement: Formulations containing recycled polyamide can reduce the carbon footprint by about 40% compared to virgin resin (based on comprehensive formulation/substitution ratio calculations); physical recycling eliminates the energy consumption of the polymerization stage, and the specific emission reduction benefits need to be calculated in combination with the substitution ratio and application scenario. [Verified online (manufacturer/industry data)]
6.6 Southeast Asia Import Channels and Material Source Background
Vietnam, Thailand, and Malaysia are important sources of recycled nylon materials: Ho Chi Minh City in Vietnam has custom modification factories for global PA and PP recycled pellets (such as Xinyi Zhong International, covering about 20,000 square meters); Bangkok in Thailand has PA66 recycled pellet manufacturers supplying hundreds of tons per month; Malaysia has companies that have put into operation PA66 recycled production lines for automotive airbag resin (6 lines, with an annual capacity of about 12,000 tons per site). [Online verification/pending confirmation]
Risks and to be verified: Southeast Asian nylon waste is often mixed with PA6/PA66/long-chain nylon and fillers, making sorting difficult; imported materials need to verify customs classification (under HS 3908), Basel Convention regulations, and rules of origin; quantity, purity, and tariffs need to be verified item by item and confirmed through on-site inspections or trader channels. [To be verified]
Suggestions for Approaching the Writing of the 7-Series Articles
A series of articles on recycled nylon can be approached from the following six themes, taking into account material selection, cost, processing, certification, and source of materials.
Table 14 Topics and Entry Points of Recycled Nylon Series Articles
| Serial Number | Series of article topics | Entry point |
|---|
| One | Application map of recycled nylon: engine covers, connectors, climbing ropes | Automotive/Electronics/Industrial/Textile Four Major Sectors, Market Data and Material Selection Logic |
| Two | What is Recycled Nylon: PIR/PCR, SSP Viscosity Enhancement, and Chemical Recycling | Definition, system classification, process chain, solid-phase thickening and chemical recycling routes |
| Three | How to choose recycled nylon grades: GB/T 44392 Grade A/B/C | Ash content, viscosity, and glass fiber—three rulers to determine grades |
| Four | Performance and Color of Recycled Nylon: Viscosity, Moisture Absorption, and Color System | Degradation mechanism, drying and moisture adjustment, flame retardant and heat resistance retention, color and pricing |
| Five | The three main battlegrounds: automobiles, electronics, and industrial machinery | Three battlefield selection logic: cars need certification, electronics need stability, industry needs refinement |
| Six | Automotive-grade Certification Thresholds and Material Source Assurance: ELV and IMDS | Regulation timeline, OEM threshold, closed-loop recycling, direct sourcing from Southeast Asia |
8 References
Market and Policy: Dataintelo (Recycled PA6 approximately $700 million in 2025, CAGR about 8.2%; Recycled PA66 approximately $970 million in 2025, CAGR about 9.2%; automotive accounts for 35-38.5%, Asia-Pacific about 42.3%, PCR accounts for about 58.7% of recycled PA6 feedstock). [Online verification]
Automotive materials: Industry research reports by Douding/Boyan Consulting and others (In 2023, China's consumption of recycled reinforced PA6 for automobiles was 185,000 tons, accounting for 42.3% of the global amount; engine peripheral applications were 62,000 tons, accounting for 33.5%; by 2025, recycled nylon 6 engineering materials will reach 53,000 tons, a year-on-year increase of 39.5%; the procurement threshold for leading automakers is ≥15%). [Online verification/to be confirmed]
Application structure: Industry research report (2025 recycled nylon pellets: Electronics 4.82 billion / Automotive 5.27 billion / Tools and sports 3.16 billion / Others 7.25 billion). [Online verification / to be confirmed]
Grading Standards: GB/T 44392-2025 (Recycled polyamide grading A/B/C ash content ≤0.3%/0.6%/1.2%, metal impurities ≤50/120/300 ppm); the standard name and clauses are subject to the officially published text. [Online verification / to be confirmed]
Viscosity and Thickening: Patents and industry materials (Recycled PA66 relative viscosity 2.2-2.7, ash content ≤0.5%; Weixing New Materials V-RENYL®N6R through SSP increased inherent viscosity 2.1→2.8 dL/g). [Online verification]
Performance: EasyRecycle net product specifications, Yihui Plastics PA6 data (virgin PA6 tensile strength about 70 MPa, recycled reinforced ≥60 MPa); Patsnap (Recycled polyamide formulation carbon reduction about 40%). [Online verification]
Capacity Layout: DouDing industry research report (JiaRen 32.1 kt / 12.8%, Ruimeifu 28.6 kt / 11.4%); top five virgin shares (Shenma 21.4%, Kingfa 18.9%, etc., automotive PA6 reference). [Online verification / to be confirmed]
Prices: 1688 (PA66 fiber-reinforced / recycled about 9,200 RMB/ton), Douyin recycling market (PA6 waste 5,000-6,000, PA66 waste 6,000-7,000, glass fiber reinforced nylon 3,500-4,500, waste plastic PA 5,800-7,500), PA6 GF30 recycled material about 10,100 RMB/ton. Different reference bases, for magnitude reference only. [Online verification / to be confirmed]
Policies: EU ELV (EU) 2026/1738 (effective 2026-08-13; new models ≥15% by 2032/09/01, ≥25% by 2036, ≥20% closed-loop); interpretations by China Automotive Research, Ximei Consulting, Puwei Consulting, etc. [Online verification]
Southeast Asia Material Sources: Vietnam Xinyi Zhong International, Thailand TradeKey PA66 recycled pellet manufacturers, Zhongxin Hongwei Malaysia base (PA66 airbag resin recycling line 6 units, annual capacity about 12,000 tons). [Online verification / to be confirmed]
FDA: 21 CFR 177.1500 (Nylon resins) as reference for nylon food contact clauses. [Online verification / to be confirmed]
Note: Numbers marked as 'to be confirmed' come from secondary online reports, industry research reports, or single sources; it is recommended to reconfirm with manufacturer datasheets, public company announcements, and official standard texts before formal external citation.
