Overview
Polypropylene (PP) is a semi-crystalline thermoplastic polymer derived from propylene monomers. It ranks among the most widely produced plastics globally due to its balance of performance, processability, and cost. PP is categorized into homopolymers (stiffness-focused) and copolymers (impact-resistant), making it adaptable to diverse industrial needs. First commercialized in the 1950s, PP has become indispensable in sectors like packaging, where its moisture resistance and clarity are valued. Its recyclability (resin ID code 5) further enhances its appeal in sustainability-driven markets. PP’s versatility stems from its ability to be molded, extruded, or thermoformed with relative ease.
Physical and Chemical Properties
PP exhibits a low density (0.855–0.946 g/cm³), making it lighter than many competing plastics like polyethylene. Its melting point ranges from 130–171 °C, depending on crystallinity and grade. PP resists acids, alkalis, and organic solvents but degrades under prolonged UV exposure unless stabilized. The material’s tensile strength (30–40 MPa) and fatigue resistance suit dynamic applications like living hinges (e.g., bottle caps). PP is food-safe and FDA-compliant in many grades, though additives (e.g., flame retardants) may require specific certifications for industrial use.
Main Applications
PP dominates rigid packaging (food containers, caps) and flexible packaging (woven bags, films) due to its barrier properties and printability. In automotive manufacturing, PP is used for bumpers, dashboards, and battery casings, leveraging its impact resistance and weight savings. Medical applications include syringes and sterilization trays, where PP’s autoclavability is critical. Consumer goods like furniture, toys, and kitchenware also rely on PP for its durability and color versatility. Non-woven PP fabrics are essential in disposable medical gowns and geotextiles.
Safety and Storage
PP is chemically inert under normal conditions, posing minimal health risks. However, inhalation of dust during machining or fumes from overheating (＞200 °C) may irritate respiratory systems. Proper ventilation and PPE (e.g., masks) are recommended during high-temperature processing. Storage requires protection from direct sunlight to prevent UV degradation. Bulk pellets should be kept in sealed containers to avoid moisture absorption, which can affect processing. Fire hazards are low, but PP burns readily once ignited, releasing acrid smoke.
B2B Procurement Guide
When sourcing PP, specify the grade (e.g., isotactic homopolymer for stiffness, random copolymer for clarity). Key certifications include ISO 9001, FDA, or EU 10/2011 for food contact. UV-stabilized grades are critical for outdoor applications. Suppliers often offer compounded PP with additives (e.g., glass fiber for reinforcement). MOQs vary; large-volume buyers (＞1 ton) can negotiate prices below $1.50/kg. Verify lead times, as specialty grades may require longer production cycles. Regional pricing differences exist—Asian markets often offer lower costs but longer shipping times.
Related Manufacturers
- 主营：PP、工程塑料
- 主营：聚丙烯、科思创PC/ABS、杜邦 POM、PP 博禄北欧化工、PP 道达尔能源、PPS塞拉尼斯、PP利安德巴塞尔、聚碳酸酯塑料胶粒、PBT 沙特基础、德国科思创 TPU、PC韩国乐天化学、聚碳酸酯塑料、塑料合金、PA66德国巴斯夫、日本宝理 PBT
- 主营：共聚物、rtpesd800、玻璃珠、挤出pps、pps塑胶、abs合金、燃料油、emi密度、聚苯醚、增强fda、导电sds、导电fda、电绝缘、pa6耐热、pa6阻燃、杜邦pbt、耐候物、流动pom、tc-873rv1、耐热中、聚丙烯、缩水率、增强sds、耐酸pom、耐候sds
- 主营：POM聚甲醛、工程塑料PA6/66、防弹胶PC、通用塑料PP/ABS、特种塑料PPS/LCP、500P杜邦POM、PC/ABS合金品牌、PBT/PET、聚乙烯PE
- 主营：导电材料、医疗塑料、汽车塑料、PP、PPS、高温塑料、抗静电塑料、耐磨材料、生物基塑料、红外光穿透、PE、ABS、POM、PBT、PC、PA、PMMA、EVA、PEI、ETFE、PTFE、POE
- 主营：PA66原料、PA6原料、POM原料、洗碗机门衬垫PP、PA尼龙
- 主营：PMMA、PVC、TPE、PPS、PP、PPO、TPU、PCT、PC、PBT、POM、PC/ABS、MABS、CAP、CAB、TPV、CA、PCTG、PA66、PA6、PA6T、PA9T、PET
- 主营：POM、PA66、PC、Pom100p、Pom500p、Pom900p、Pom100t、M90-44、F20-03、ABS747、abs757、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：POE、EVA、PA66、PP、PE、ABS、LDPE、HDPE、PC、PA6、POM、PEEK、PVDF、PBT
- 主营：正牌料、高温特种塑胶、工程材料、PP、橡胶原料、通用塑胶、PA66、POM、PFA、ETFE、PVDF、PBT、PC、ABS、PEEK、PTFE、FEP、PC/ABS
- 主营：PA6、PBT、PC、PPS、PPO/PPE、PPA、PC/ABS、TPU、TPV、ABS、PA66、POM、PMMA、ASA、EMAA、TPEE、PCTG、POE、EVA、PCT、SEBS、EAA、PEEK、PSU、PEI
- 主营：PC、PBT、ABS、PP、PPO、POM、EVA、PE、PA6、LDPE、TPEE、TPU、PA66、LLDPE、PA46、EAA、PMMA、PET
- 主营：POM、PBT、PC、PPA、PPS、PC/ABS、PCTG、LCP、PETG、PCTA
- 主营：POM、PA66、PA6、安特普3381、铁氟龙、TPU、PBT、PC、特种工程塑料
- 主营：LCP、PA66、PSU、PPSU、PPS、TPEE、PEEK、PA12、PBT/ASA、PC、PC/ABS、ABS、润滑脂、PTFE、特富龙
- 主营：PA66、PA12、PC、PPA、PPO、PPS、PPE、ABS、POM、TPU、EVA、PBT、ASA、PC/ABS、PEEK、POE、TPEE、TPE、EAA、EMA、PET、PMMA
- 主营：PC ABS、特种塑料
- 主营：PC通用塑料、耐高温塑料、尼龙塑料、安特普LCP3487、PVDF铁氟龙
- 主营：安特普605TFE15、阻燃剂、pc阻燃剂、阻燃母粒
- 主营：POM、PA66、POE、安特普6042、各种进口工程塑料、工程塑料改性