Overview
Cast plastic, also known as cast film, is produced through a continuous extrusion process where molten polymer is spread onto a chilled roll to form a uniform thin film. This method yields materials with superior optical clarity and dimensional stability compared to blown films. The technology originated in the mid-20th century as demand grew for high-quality plastic films in packaging applications. Today, it represents a significant segment of the plastic film market, with polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET) being the most common base materials.
Physical and Chemical Properties
Cast plastic films exhibit excellent mechanical properties including high tensile strength, tear resistance, and flexibility. The rapid cooling process during production results in films with lower crystallinity than blown films, contributing to their superior transparency. Chemical resistance varies by polymer type, but most cast films demonstrate good resistance to water, acids, and alkalis. Oxygen and moisture barrier properties can be enhanced through co-extrusion or coating technologies, making them suitable for sensitive product packaging.
Main Applications
The primary application of cast plastic is in flexible packaging, particularly for food products where clarity and barrier properties are essential. It's widely used for snack food packaging, confectionery wraps, and pharmaceutical blister packs. In industrial applications, cast plastic serves as release liners, decorative laminates, and photovoltaic backsheets. The medical industry utilizes sterilizable cast films for surgical drapes and device packaging due to their purity and consistency.
Safety and Storage
Most cast plastic films are considered non-hazardous under normal handling conditions. However, dust accumulation on film rolls can create slip hazards in production environments, requiring proper housekeeping measures. Storage recommendations include maintaining temperatures below 40°C with relative humidity under 70%. Film rolls should be stored vertically on appropriate racks to prevent deformation, with protective end caps to avoid edge damage during handling.
B2B Procurement Guide
When sourcing cast plastic films, buyers should clearly specify technical parameters including material grade, thickness tolerance (typically ±5%), width, and core size. For packaging applications, barrier requirements (OTR, MVTR) and seal initiation temperature are critical specifications. Quality indicators include consistent gauge distribution, absence of gels or contaminants, and good winding quality. For large-volume purchases, consider suppliers with in-line quality control systems and ask for certification of compliance with relevant food contact or medical standards as applicable.
Related Manufacturers
- 主营：[]
- 主营：F20-03、m90-44、m90-45、PC-1100、pom100p、pom500p、pom900p、云天化pom、宝理pom、旭化成pom、杜邦pom、巴斯夫pa66、杜邦pa66、聚甲醛原料、聚丙烯pp、埃克森美孚POE、美国苏威PPSU、科思创PC、沙伯基础PC、李长荣聚丙烯、路博润TPU、埃克森ldpe、巴塞尔ldpe、韩华ldpe、日本三菱pom
- 主营：[]
- 主营：[]
- 主营：PA66、POM、PA6、透明健身器材塑料、TPU
- 主营：[]
- 主营：[]
- 主营：PA6基础创新塑料、专用注塑原料
- 主营：输送带、四氟膜、无缝带、流延F46薄膜、密封件、ptfe薄膜、氟塑薄膜、乙烯薄膜、车削薄膜、铁氟龙薄膜、四氟焊接膜、支持包边接头、无缝粘合机带、特氟龙无缝带、铁氟龙无缝带、无缝传送带、铁氟龙输送带、特氟龙输送带、铁氟龙胶带、聚四氟乙烯薄膜、铁氟龙膜胶带、聚四氟乙烯膜、聚四氟乙烯电子薄膜、防腐蚀特氟龙膜、铁氟龙四氟膜、宽幅铁氟龙胶带
- 主营：耐高温材料、LCP、尼龙原料、塑料颗粒、PPA、PC、PC/ABS、PPS、EVA、PP、POM、POE、PA6、PA66、TPU、PET、ABS、聚丙烯、PA12、PBT、PPO、PPE、合金料、LDPE、万华化学tpu、HDPE
- 主营：云天化pom、美国杜邦pom、日本宝理pom、塑料颗粒、日本旭化成pom、德国巴斯夫tpu、科思创tpu、奇美abs、德国朗盛pa66、美国首诺pom、泰科纳pom、韩国可隆pom、韩国工程pom、韩国乐天pc、日本三菱pom、PPO、沙伯基础pc/abs、法国阿科玛pvdf、PPA、云天化POM m90、美国陶氏poe、埃克森美孚poe、云天化聚甲醛、pom云天化m90、LCP、PTFE
- 主营：玻璃砂、研磨玻璃珠、喷砂玻璃微珠、玻璃粉、透明粉、玻璃鳞片、负离子液、硅微粉、空心玻璃微珠、反光粉、反光玻璃微珠、电气石、氧化铈抛光粉、酒瓶玻璃珠、玻璃球、玻璃微珠、除醛液、玻璃珠
- 主营：pom、杜邦pom、宝理pom、旭化成pom、巴斯夫、pom100p、聚甲醛共聚物、赛钢聚甲醛原料、pom500p、pom900p、奇美abs、浙石化、中石化、pvdf、PCTG、PARA、沙伯基础、pmma、pps、日本东丽pa66、云天化、科思创TPU、陶氏POE、埃克森美孚POE、美国苏威
- 主营：pps加纤、pbt树脂、abs塑胶、abs塑料、工程塑料、脱模pom、透明abs、聚丙烯、pps玻纤、阻燃abs、pp李长荣、聚乙烯pe、耐水解psu、PC原料、LDPE原料
- 主营：美国杜邦、PBT、德国巴斯夫、塑料原料、工程塑料、德国朗盛、PA66、PC+ABS、PET、韩国LG、日本旭化成、PC、尼龙PA、POM、PPO、PPS、奇美abs、PA6、TPU、POM100p、POM500p、pom900p、pc1100、pc/abs、日本宝理pom
- 主营：耐磨pom、pom代理、伊士曼、巴斯夫、聚甲醛、红外线、一诺威、高熔指、光扩散、塑胶pla、聚乙烯、铁氟龙、中石化、胺塑胶、增韧pom、尼龙-pa、旭化成、pa6韩国、氟塑胶、聚酰胺、弹性体、耐冲击、66-塑胶、聚碳酸脂、高温塑胶
- 主营：EVA、PP、PC、塑料颗粒、PA6、PA66、POM聚甲醛、ABS、PPS、PE、PETG、PMMA、PBT
- 主营：聚烯烃、机械仪器、工业壳体、塑料颗粒、升级透明聚丙烯
- 主营：ABS、PC、POM、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：塑胶原料、铁氟龙、PTFE、工程塑料、蜡塑料pvc、塑料玩具、HDPE、PVDF、PC、PP、pPA6、PA66、hhm5502lw、c2950-111、聚乙烯、ppo塑胶、pcg-3430r、t-45注塑、pc243r-111、pese2010g4、包装薄膜、电线电缆、照明灯具、汽车部件、耐低温热
- 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：POM塑胶原料、PA66塑胶原料、PA6塑胶原料、PVA降解塑料、PA12塑胶原料、LCP塑胶原料、PPO塑胶原料、ABS塑胶原料、PC塑胶原料、TPEE塑胶原料、TPU塑胶原料