Overview
Natta, commonly referred to as polypropylene (PP), is a thermoplastic polymer discovered by Giulio Natta in the 1950s. It is produced via chain-growth polymerization of propylene monomers and is known for its versatility, cost-effectiveness, and recyclability. Natta's molecular structure can be isotactic, syndiotactic, or atactic, with isotactic being the most commercially significant due to its crystallinity and strength. Polypropylene is the second-most widely produced commodity plastic globally, after polyethylene. Its applications span multiple industries, including packaging, automotive, textiles, and healthcare. The material's adaptability to various processing methods like injection molding, extrusion, and thermoforming makes it a preferred choice for manufacturers.
Physical and Chemical Properties
Natta exhibits a unique combination of physical and chemical properties that make it suitable for diverse applications. It has a low density (0.855-0.946 g/cm³), making it one of the lightest thermoplastics available. The material's melting point ranges between 130-171°C, depending on its tacticity and crystallinity. It shows excellent resistance to acids, bases, and organic solvents, though it is susceptible to oxidation at high temperatures. Mechanically, polypropylene offers good fatigue resistance, making it ideal for living hinges (e.g., bottle caps). Its electrical insulation properties are noteworthy, and it has a high dielectric strength. However, Natta has poor UV resistance unless stabilized with additives. The material's thermal expansion coefficient is relatively high, which must be considered in precision applications.
Main Applications
Natta's applications are vast due to its adaptability and performance. In packaging, it is used for food containers, films, and caps due to its moisture resistance and FDA compliance. The textile industry utilizes PP fibers for carpets, ropes, and non-woven fabrics like medical masks and diapers. Automotive components such as bumpers, battery cases, and interior trim rely on Natta for its lightweight and durability. In healthcare, polypropylene is used in syringes, medical vials, and surgical meshes because of its sterilizability and chemical inertness. Consumer goods like furniture, kitchenware, and toys also incorporate PP. Recent innovations include bio-based polypropylene and advanced composites for specialized industrial uses.
Safety and Storage
Polypropylene is generally considered safe for most applications, earning FDA approval for food contact. However, precautions are necessary during processing. Molten PP can release volatile organic compounds (VOCs), so adequate ventilation is essential. Workers should avoid inhalation of dust generated during machining or grinding. Storage recommendations include keeping Natta in a cool, dry environment away from direct sunlight to prevent UV degradation. Bulk pellets should be stored in sealed containers to avoid moisture absorption, which can affect processing. Fire safety measures are critical, as polypropylene is flammable and produces dense smoke when burned. Proper grounding is advised to prevent static accumulation during handling.
B2B Procurement Guide
When procuring Natta (polypropylene), buyers must specify key parameters to ensure material suitability. The melt flow index (MFI) indicates processability, with lower values for extrusion and higher for injection molding. Homopolymers offer higher stiffness, while copolymers provide better impact resistance. Additives like UV stabilizers, flame retardants, or anti-static agents should be requested based on application needs. Suppliers typically offer PP in pellet form, with standard packaging being 25-kg bags or bulk shipments for large-scale buyers. Pricing varies by grade, quantity, and geographic region, with commodity grades starting at approximately $1.20/kg. Buyers should verify certifications like ISO 9001 and request technical datasheets for critical applications. Lead times can range from 2-6 weeks, depending on customization requirements.
Related Manufacturers
- 主营：桂花、榆叶梅、水蜡苗、娜塔栎、绣线菊、金叶女贞、红叶小檗、亮晶女贞、连翘苗、红王子锦带、海棠、紫薇、木槿、鼠尾草、水生植物、花灌木、地被草花、草坪、大叶黄杨、小叶黄杨、地被菊、月季、火炬花、完美石竹、大花金鸡菊、小丽花
- 主营：红梅、榆叶梅、美人梅、娜塔栎、红叶李、金叶女贞、红王子锦带、绿萼梅、小叶黄杨、大叶黄杨、红叶石楠、金森女贞、白玉兰、红枫、垂丝海棠、红帽月季、丰花月季、水蜡、卫矛、红瑞木、生态浮岛、黄金枸骨、人工浮床、高杆月季、五彩锦带、梅花
- 主营：金叶女贞、红叶小檗、木槿、娜塔栎、紫薇、红枫、桂花、大王椰子、加拿利海枣、紫荆、五彩锦带、榆叶梅、红梅、美人梅、棕榈、大叶黄杨、小叶黄杨、红瑞木、水蜡苗、西府海棠、红叶李、洒金柏、白玉兰、樱花、碧桃、法国冬青
- 主营：红叶李、五角枫、落叶乔木、25公分娜塔栎、8公分海棠、9公分海棠、15公分海棠、14公分海棠、11公分紫叶李、14公分紫叶李、绿化观赏造型树、行道绿化观赏树、国槐、丛生五角枫、丛生紫叶李、樱花、15公分国槐、20公分国槐、法桐、白蜡、榉树、黄金槐、红枫、造型松、榆叶梅、海棠
- 主营：西府海棠、绿化苗木、垂丝海棠、娜塔栎、北美海棠、五彩锦带、大叶黄杨、小叶黄杨、水蜡苗、红王子锦带、红瑞木、丰花月季、红帽月季、梅花、红梅、绿梅、榆叶梅、美人梅、腊梅、紫竹、刚竹、金镶玉竹、八仙花、绣球花、观赏竹、冬青
- 主营：五彩锦带、大叶黄杨、小叶黄杨、娜塔栎、金叶女贞、亮金女贞、亮晶女贞、银姬小蜡、月季、桂花、茶梅、杜鹃、棕榈、三角梅、红枫、木芙蓉、法国冬青、红叶小檗、龙柏、垂丝海棠、西府海棠、红叶李、卫矛、卫矛球、大叶黄杨球、荷兰菊
- 主营：五彩锦带、法国冬青、彩叶杞柳、娜塔栎、金叶女贞、红叶小檗、梅花、榆叶梅、月季、红枫、海棠、大叶黄杨、小叶黄杨、金边胡颓子、美人梅、红梅、八仙花、绣球花、亮金女贞、垂丝海棠、龙柏、红王子锦带、紫荆、紫薇
- 主营：龙柏、金叶女贞、连翘、娜塔栎、大叶黄杨、小叶黄杨、红叶石楠、金森女贞、月季、红瑞木、紫薇、碧桃、红梅、美人梅、榆叶梅、垂柳、八仙花、紫叶李、垂丝海棠、红枫、洒金柏、木香花、桂花、绣球花、浮岛、木绣球
- 主营：金镶玉竹、八仙花、紫竹、娜塔栎、红叶石楠、兰花莉、葱兰、大花雏菊、月季、海棠、落新妇、桂花、石菖蒲、马蹄金、鸢尾、金鸡菊、美人梅、木香花、水果篮、金钟花、千鸟花、金叶女贞、西洋杜鹃、比利时杜鹃、太阳花
- 主营：五彩锦带、大叶黄杨、小叶黄杨、娜塔栎、龙柏、榆叶梅、红梅、红叶李、紫叶李、桂花、雪松、水蜡、红枫、紫丁香、人工浮岛、生态浮岛、金叶女贞、海棠、锦带、月季、绿萼梅、美人梅、腊梅、紫薇
- 主营：五彩锦带、龙柏、法国冬青、娜塔栎树、蜀桧、红梅、榆叶梅、美人梅、水腊、红叶李、海棠、大叶黄杨、小叶黄杨、紫竹、刚竹、草坪、金镶玉竹、早园竹、红瑞木、红王子锦带、红枫、高杆月季、丰花月季、梅花、水蜡苗
- 主营：红叶石楠、金森女贞、五彩锦带、娜塔栎、穗花牡荆、鼠尾草、麦冬草、大叶黄杨、小叶黄杨、龙柏、桂花、金桂、红枫、红花继木、茶花、朴树、瓜子黄杨、月季、卫矛球、金叶女贞、北海道黄杨、洒金柏、花境植物、水生植物、金丝桃
- 主营：紫丁香、花叶蔓、火棘球、娜塔栎价格、水果兰、南天竹、菲油果、广玉兰、矮紫薇、连翘苗、毛杜鹃、海桐球、郁李苗、黄金菊、龙柏苗、红梅、宫粉梅、榆叶梅、生态浮岛、金叶女贞、大叶黄杨、龙柏、红枫、美人梅、黄杨、月季
- 主营：银杏树、美国红枫、樱花、娜塔栎、海棠、榉树、法桐、国槐、白蜡、鸡爪槭、垂柳、红冠红枫、早樱、晚樱、30银杏树、绿化树苗、道路行道树、景观绿化树、公园景观树、绿化工程树、街道绿化树
- 主营：银杏树、白蜡、国槐、娜塔莉、海棠、法桐、樱花、玉兰、红枫、红枫红冠、小苗基地、速生白蜡、红枫基地、樱花小苗、红梅基地、红枫小苗、丛生白蜡