Overview
S-Series Standard Polyester, a subtype of polyethylene terephthalate (PET), is a thermoplastic polymer prized for its balance of mechanical properties and processability. It is synthesized through polycondensation of terephthalic acid and ethylene glycol, resulting in a linear, semi-crystalline structure. The 'S-Series' designation typically indicates standardized grades optimized for consistent performance in extrusion, injection molding, or fiber spinning. Globally, it accounts for a significant share of polyester production due to its versatility and recyclability. Industries favor it for its ability to be engineered into films, fibers, or rigid containers while maintaining cost efficiency. Its compatibility with additives (e.g., UV stabilizers, flame retardants) further expands its utility across sectors.
Physical and Chemical Properties
S-Series Polyester exhibits a glass transition temperature (Tg) of 70-80°C and a melting range of 250-260°C, making it suitable for applications requiring thermal stability below these thresholds. Its semi-crystalline nature contributes to high tensile strength (50-80 MPa) and moderate elasticity, though additives can adjust these properties. Chemically, it resists dilute acids, alkalis, and most organic solvents at room temperature but degrades in strong bases or at elevated temperatures. Hydrolysis resistance is moderate; prolonged exposure to moisture at high temperatures can reduce molecular weight. UV resistance varies but can be enhanced with stabilizers for outdoor use.
Main Applications
In textiles, S-Series Polyester is spun into fibers for apparel, home furnishings, and technical textiles (e.g., seat belts, tire cords) due to its wrinkle resistance and durability. The packaging industry uses it for bottles (food, beverages) and films (laminates, shrink wraps), leveraging its gas barrier properties and clarity. Industrial applications include engineering plastics for automotive parts, electrical insulation, and conveyor belts. Recycled grades (rPET) are increasingly adopted in sustainable packaging and fiber production, aligning with circular economy initiatives.
Safety and Storage
While S-Series Polyester is generally non-toxic under normal conditions, processing at high temperatures (above 300°C) may release acetaldehyde or other volatile compounds, necessitating proper ventilation. Dust from pellets or flakes poses minimal hazard but should be controlled to prevent respiratory irritation. Storage recommendations include keeping materials in sealed containers to prevent moisture absorption, which can affect processing. Pellets are hygroscopic and may require drying (120-160°C for 4-6 hours) before extrusion or molding to avoid defects like hydrolytic degradation.
B2B Procurement Guide
Buyers should specify key parameters such as intrinsic viscosity (IV: 0.6-1.0 dl/g for fibers, 0.7-0.8 for bottles), carboxyl end-group content (affects hydrolysis resistance), and color (L* value for clarity-critical applications). Food-contact grades require FDA or EU compliance documentation. Supplier audits are advisable to verify consistency in molecular weight distribution and additive formulations. Bulk procurement (20+ metric tons) typically offers 5-15% cost savings, but just-in-time delivery may offset inventory costs. Recycled content premiums vary by region (e.g., 10-20% higher for 30% rPET).
Related Manufacturers
- 主营：Pa66、通用塑料、工程塑料、聚酯基TPU、聚丙烯、聚乙烯、POM、聚甲醛、亚克力、弹性体、EVA、PP、PC、LDPE、LLDPE、TPE、TPEE、TPU、PC/ABS、粉料、GPPS、HDPE、PBT、SEBS、PETG、PA12
- 主营：正牌料、高温特种塑胶、工程材料、橡胶原料、通用塑胶、PA66、POM、PFA、ETFE、PVDF、PBT、PC、ABS、PEEK、PTFE、FEP、PP、PC/ABS
- 主营：ABS、PC、POM、热致液晶聚酯、TPU、PP、LCP、PBT、PMMA、Pom100p、Pom900p、Pom500p、M90-44、F20-03、ABS747、ABS757、PEEK、PVDF、PPSU、PPA、PARA、PCTG、PA9T、Pa12、COC
- 主营：PC、耐高温材料、ABS、防火ABS、防火阻燃PC、PC防火阻燃V0抗UV、PA66、POM、PBT、PP、PC/ABS、TPU、PBT 加纤防火、PA66 加纤防火、PA66 加纤
- 主营：氟碳漆、防腐胶泥、氟碳面漆、乙烯基不饱和聚酯树脂、防水涂料、丙烯酸面漆、环氧富锌漆、环氧煤沥青漆、聚氨酯防腐漆、环氧树脂涂料、丙烯酸树脂漆、玻璃鳞片胶泥、特种氰凝涂料、环氧富锌底漆、玻璃鳞片涂料、氟碳金属防腐漆、环氧富锌防锈漆、8710饮用水涂料、环氧乙烯基树脂、环氧沥青漆、聚脲防水涂料、水泥基渗透结晶、三布五油防腐施工、环氧云铁中间漆
- 主营：镜片料、聚苯砜、聚丙烯、聚甲醛、PA66、PA6、PPS、PBT、POM100p、Pom500p、Pom900p、M90-44、F20-03、pa9t、TPU、PPSU、PEEK、PVDF、PPA、PMMA、HIPS、LDPE、HDPE、赛刚pom
- 主营：工程塑料
- 主营：宝钢彩涂卷、宝钢彩钢卷、宝钢彩涂板、宝钢彩钢板、镀铝锌彩涂卷、彩钢板、彩涂板、铝镁锌、黄石彩涂卷、镀铝锌板、彩钢卷、马钢彩钢板
- 主营：abs、pom、pc、pe
- 主营：TPEE弹性体、TPE原料、TPU聚氨酯、沙林树脂、PTFE聚四氟乙烯、PFA全氟乙烯、PVDF、PPA、PA12、PA46、PA9T、聚砜PSU、PPSU、PEEK、PEI、COC、ETFE、THV
- 主营：工业级白油、食品级白油、食品酒精、无水乙醇、白凡士林、三乙醇胺、溶剂油、P507萃取剂、二甲基丙烯酰胺、正十二烷、8-羟基喹啉、阻聚剂701、聚乙二醇、三乙二醇、桐油、1227杀菌剂、乙醇钠、乙酸乙酯、二甲苯
- 主营：玻璃鳞片胶泥、玻璃钢防腐树脂、乙烯基、不饱和聚酯树脂、水性彩钢漆、防腐胶泥、彩钢屋面防水涂料、环氧树脂涂料、氰凝防腐防水涂料、聚氨酯面漆、环氧富锌漆、三布五涂、建筑隔热涂料、热放射隔热涂料、萤丹防腐底漆、湿固化环氧封闭底漆、红丹防锈底漆、无机富锌底漆、各色氯化橡胶面漆、醇酸底漆、聚脲防腐涂料、油性环氧腻子、双组分防碳化涂料、丙烯酸防腐漆、银箔漆、彩钢瓦翻新漆
- 主营：二氧化硅、乳化剂、消泡剂、不饱和聚酯树脂、分散剂、润湿剂、增稠剂、树脂、抗氧剂、杀菌防腐防霉剂、uv单体
- 主营：POM、PA66、PC、abs757、Pom100p、Pom500p、Pom900p、Pom100t、M90-44、F20-03、ABS747、TPU、美国杜邦pom、日本旭化成pom、日本宝理pom、ASA、COC、PEEK、PVDF、PCTG、PCTA、PA612、Pa6t、Pa9t
- 主营：聚烯烃、机械仪器、工业壳体、抗紫外线聚酯橡胶、升级透明聚丙烯
- 主营：PA6、PA66、PBT、PC、POM、PC/ABS、科思创、美国杜邦、日本宝理、日本东丽、日本旭化成