Overview
Upland cotton (Gossypium hirsutum) is a perennial shrub domesticated in Mesoamerica and now accounts for approximately 97% of global cotton production. Botanically classified under Malvaceae family, this cotton species thrives in tropical and subtropical regions with 120-180 frost-free days. The term 'upland' distinguishes it from long-staple Pima cotton (Gossypium barbadense) and refers to its historical cultivation in higher elevations. The commercial value lies in the seed hairs (lint) that develop in bolls over 50-80 days after flowering. Modern cultivars like Delta Pine and Stoneville have been optimized for higher yields (3-5 bales/acre) and pest resistance. Major producing countries include the United States (Memphis/Texas regions), China (Xinjiang), India (Punjab), and Brazil (Mato Grosso).
Physical and Chemical Properties
Upland cotton fibers consist of 88-96% cellulose, with the remainder being waxes, pectins, and proteins. The fibers exhibit a natural twist (convolution density of 100-300 turns/inch) that enhances spinning performance. Under microscopic examination, the fibers show a kidney-shaped lumen and characteristic growth rings. Key physical parameters include a tenacity range of 3-5 g/denier and elongation at break of 5-10%. The moisture regain is 7-8.5% at standard conditions (70°F, 65% RH). Chemically, the fibers are resistant to weak acids but degrade in concentrated alkalis above 50°C. The crystallinity index ranges from 70-80%, contributing to its dimensional stability in textile applications.
Main Applications
Over 60% of upland cotton production supplies the apparel industry, particularly for woven fabrics (denim, chambray) and knitwear (t-shirts, socks). The medium staple length makes it suitable for rotor spinning (OE yarn) and conventional ring spinning up to 40 Ne counts. Non-apparel uses include: 1) Medical cotton (absorbent cotton USP) requiring high purity grades, 2) Cotton linters for banknote paper and cellulose derivatives, 3) Cottonseed byproducts for edible oil (smoke point 230°C) and animal feed. Emerging applications include biodegradable nonwovens and cotton-based composites for automotive interiors.
Safety and Storage
Raw cotton bales present fire hazards due to the lipid content (0.4-1.2%) and large surface area. NFPA 61 standards recommend storage warehouses with <25% relative humidity and maximum stack heights of 20 feet with 36-inch aisles. Pneumatic conveying systems require spark detection and suppression systems. Biological risks include exposure to endotoxins from Gram-negative bacteria during ginning. OSHA permissible exposure limits for cotton dust are 200 μg/m³ (8-hour TWA). Proper bale packaging (polyethylene-wrapped) prevents moisture absorption during maritime transport, which can lead to mold growth (Aspergillus spp.).
B2B Procurement Guide
Commercial contracts typically specify USDA grading parameters: staple length (1.1-1.3 inches), micronaire (3.5-4.9), strength (25-32 g/tex), and uniformity index (>82%). Premiums apply for color grades 11-21 (whiter) and leaf grade 1-3 (cleaner). For bulk imports, consider: 1) Shipping terms (CIF vs FOB), 2) ICE Futures hedging strategies, 3) Customs classifications (HS 5201.00). Sustainable options include Better Cotton Initiative (BCI) certified cotton with 18-20% lower water footprint. Quality control should verify absence of neps (>200/100 sq.in) and seed coat fragments.
Related Manufacturers
- 主营：[]
- 主营：棉被、救灾棉被、床上用品棉被、床上用品、棉胎、床上用品四件套、被子、棉絮
- 主营：床上用品、棉被子、酒店民宿被子被芯棉被子、学校学生床上用品棉被子、学校学生床上用品六件套三件套、医院医用棉被子褥子、医院医用床上用品六件套三件套、幼儿园床上用品棉被子褥子、幼儿园床上用品六件套三件套、宿舍床上用品三件套六件套棉被子褥子、民政应急救灾棉被子褥子、民政应急救灾棉花被子褥子、民政应急救灾防寒服羽绒服、民政应急救灾棉大衣军大衣、民政应急救灾棉衣裤、民政应急救灾物资充气防潮垫、民政应急救灾应急包生活包、学校学生蚊帐、民政应急救灾毛巾被、毛毯、凉席、救灾床上用品、酒店床上用品、酒店布草、棉胎棉絮
- 主营：涤纶莫代尔、针织纯棉纱、亚麻粘胶纱、细绒棉缝纫线、赛纺竹纤维、阻燃涤纶纱、粘胶竹节纱、腈纶纱针织、粘胶羊毛纱、棉纱天丝粘胶、纯棉合股纱、天丝棉纱
- 主营：亚麻纱、涤纶纱、莱赛尔纱、长绒棉纱线、固体腈纶纱、涤包涤缝纫线、漂白原色纱线、再生涤纶纱 再生棉纱、兰精天丝纱 国产天丝纱、有机棉纱美棉纱巴西棉纱埃及棉纱皮马棉纱
- 主营：长绒棉、腈纶纱、纤维纱、细绒棉80支、粘胶纱32支、竹纤维16支、40支竹纤维、澳棉包漂白、竹纤维粗支、阻燃腈棉纱、竹纤维染色纱
- 主营：天丝纱、莫代尔、长绒棉纱、粘胶纱、腈纶纱、晴纶纱、竹纤维纱、丝光棉、精梳棉、混纺纱、合股纱、涤纶纱、人棉纱、全棉纱、纯棉纱、阻燃纱、纯涤纱、埃及棉、匹马棉、涡流纺纱、染色纱、包芯纱、强捻纱
- 主营：毛毡垫、毛毡轮、羊毛毡、细绒棉抛光革、汇朋毛毡、书画毛毡、润滑吸油、毛毡油封、工业毛毡、魔术贴扣、毛毡床垫、抛光耐磨、毛毡刮板、防震吸油、毛毡笔袋、陶瓷抛光、汽车抛光、彩色毛毡、手套底布、羊毛磨头、钢板擦油、中粗毛毡、冲压吸油、毛毡齿轮、密封吸油、阻燃防火
- 主营：恒温纱、色纺纱、粘胶纱、大麻纱、竹节纱、天丝纱、澳棉纱、羊毛纱、亚麻纱、腈纶纱、涤兰精、包芯纱、涤纶纱、灰色纱、缝纫线、腈粘纱、纤维纱、腈棉纱、染色纱、绢丝纱、赛尔棉纱、汉麻棉纱、羊毛棉纱、长绒棉纱、精梳棉纱
- 主营：纺织品、检测技术、覆面材料、锯齿加工细绒棉检测、纺织面料、检测中心、五氯苯酚、儿童服装、童装绳索、检测平台、服装机械、检测设备、纤维检测、检测实验室、儿童服饰安全
- 主营：锯齿加工细绒棉检测、检测
- 主营：羊绒絮片、羊毛毛纺、大衣面料、细质羔子绒、袜子面料、山羊绒絮片、进口羊毛、山羊绒原料、羊羔绒、丝光羊绒、丝光英毛、驼绒、驼绒絮片、绵羊绒、绵羊绒絮片、丝光脱脂羊绒、纯羊毛毡、羊驼毛条、珍珠棉、大衣填充内胆、驼绒粘合絮片、精梳丝光绵羊绒、白色羊绒毛、羊羔绒面料、纺纱羊绒
- 主营：钢丝棉、钢绵卷、瓦楞纸包、大卷低碳、犀牛钢丝绒、金属工艺品、进口钢丝绵、大卷抛光棉、清洁球钢丝、家具抛光棉、打磨抛光棉、低碳钢刹车片、除金属玻璃划、抛光红木家具、土红色双鹰尼卷、打磨抛光钢丝绒、汽车刹车片钢棉、木材专用抛光棉、钢丝绒木头木器
- 主营：羊毛絮片、羊毛棉、鸭绒棉、山羊绒絮片、驼绒棉、羊驼绒絮片、蚕丝絮片、GOTS有机棉、GOTS有机羊毛棉、RWS羊毛棉、GRS再生棉、芳纶毡、驼毛棉、木棉絮片、兰精天丝絮片、竹纤维絮片、大豆棉、脱脂棉花絮片、铝箔保温棉、吸湿发热棉、石墨烯棉、填充物、棉絮片、发热棉、花絮片
- 主营：夏凉垫、乳胶床、四件套、包床垫、凉席垫、隔凉席、保护垫、无纺布、防水床单、冰丝床笠、乳胶凉席、纯棉被套、天丝床笠、矿石床垫、隔尿床罩、高箱乳胶、两面凉席、纯棉床单、软垫硬垫、加密床单、椰棕薄垫、床笠床套、冰丝凉席、防水枕套、天丝枕套
- 主营：吸水棉、不燃棉、石墨烯、水洗棉、棉夹棉、亚麻垫、化纤维、吸水毡、苎麻垫、吸油棉、仿丝棉、羽绒棉、针刺毡、驼绒棉、羊绒棉、竹纤维毡、阻燃毛毡、环保无菌、纤维絮片、隔尿垫棉、羊毛弹力、竹纤维棉、黏胶纤维、竹纤维针刺棉、针刺棉