Shanghai Daoqin Plastics Co., Ltd.

PVC in 文名称 is polyvinyl chloride (PVC) is chlorine ethylene polymerization 而. if is electrical method production PVC, use 汞做触媒, therefore environmental protection. generally, PVC formed product need add 人一定 for has additives.

environmental protection PVC材 material new requirements 说, generally PVC different in can has large heavy metal and 邻笨二甲 acid. processing process upper has what is the difference , main/primary is increase agent additives different , main/primary raw materials resin powder also is 一样.

自20世纪70 year 代早期开始, PVC就 already formed is ring 境保护论者, safety 倡导者 and understanding 者关注 and target/goal, main/primary inner has:

（1） chlorine ethylene can 疑 致癌 property;

（2）PVC燃烧 or waste 弃 灰烬 in can can formed 二噁英;

（3）一 PVC additives in property;

（4） and safety and ring 境风险 has various other 指责.

尽 tube/pipe in this day 持久 争论, world scope/range PVC demand still in growth. industrial upper through in mono processing 厂, polymerization 厂, resin production and generally ring in large degree reduce chlorine ethylene expand dispersion for this 主张. in addition, if can 淘汰, must through formulation reduce for that has in additives 依赖, certain heavy metal heat stabilized agent. more 进一步, waste material tube/pipe plan for 一 由PVC action separation 子以危害 ring 境名义提出 清 remove PVC 主张.

however, very obvious full 球PVC销 amount already to safety issues and 顾虑 不利 effect/influence. this issues in Europe most is obvious, that 里 反PVC运动 formed 功推动 一 抑 made property method. for/regarding therefore 而导致 full 球PVC in application in loss 失 任何估计都 is very 不确定.

受 impact most large market 包括:

（1） medical devices;

（2） toys and less year product;

（3） packaging product;

（4） automotive inner trim parts.

PVC in pipe/tube and other long cycle construction product in application this type of effect/influence very small.

2001 year A.Tukker经 long comprehensive research, using/adopting various “ from to 坟墓” LCA（生命 cycle assessment ） methods for 瑞典 PVC生命链进行 assessment, 断定: PVC生命链 for 瑞典 臭 oxygen 层消失, ring acid and 富营养化 function is has function, for/regarding 球变暖, 烟雾化 and 土埋体积 effect/influence 份额仅 is 0.15%, therefore, PVC生命链 for ring effect/influence is generally property. PVC生命链 for ring effect/influence main/primary is chlorine ethylene / chlorine ethylene production （放出二 chlorine 乙烷, chlorine ethylene mono 体, property has machine material and oxidation carbon ） and 土埋（土埋 amount ）.

当PVC生命链执行 改进 plan rear, production chlorine （汞）, chlorine 乙烷（二噁英）, manufacturing PVC products, and in use and waste material 焚烧时 generate material （铅, and 二噁英） large degree decrease/reduce, in 瑞典总 排放 amount in has amount and other or small 于0.15%. is PVC几乎不放出 a large amount of other material, has improvement for 瑞典总体 upper property and environmental protection issues.

布鲁塞尔 plastics waste product tube/pipe research already from 事一项独立 development type and specification Europe data 库, formed for packaging and frame balanced research, polyvinyl chloride (PVC) for ring 境保护 is has 利. can can substitute/replace product 取代PVC in balanced upper has what advantages.

currently, pure PVC现 already by is 无毒材 material, make by 人体摄入, 也并不 by 消化. PVC毒 property main/primary its chlorine ethylene mono and add has additives formed separation.

in 1979 year Europe 经济共同体规定 used for food packaging PVC残存 chlorine ethylene mono content upper is 1.0×10-6, and products versus 接触 食 material in chlorine ethylene content upper is 1.0×10-9. from 监视 1974 to 1985 year 间PVC products packaging material in chlorine ethylene content table/sheet 明: due to PVC technology 改进, gas technology use, Europe PVC manufacturing and processing already has difficult to this 一规定. is 并不知道 upper 限1.0×10-9 for/regarding 消费者究竟会 generate what effect/influence.

USA, 1958 year front already 经广泛 using/adopting PVC as is food packaging materials, therefore FDA 承认 it is GRAS（普遍认 is is safety ） grade material. 20世纪60 year to 70 year 代, due to chlorine ethylene mono formed from 业者特定人群出现AOL（肢端骨质 solvent understanding, accoosteolysis） and ASL（angiosarcoma, 肝癌一 types ）病变, 而引起人们 关注 and in-depth research. due to 担心致癌 material ——残留 chlorine ethylene 会进入 to packaging food in, BATF（酒, and light device tube/pipe 理局） prohibited use hard 质PVC bottle 子装酒. therefore, 1975 year FDA 提出建议（40FR40259）撤销 hard 质PVC GRAS材 material 位, prohibited it used for food packaging, 但并不 prohibited soft 质PVC packaging materials food. PVC resin manufacturing technology and plastics industrial speed reaction, in very short time inner PVC in chlorine ethylene concentrated degree drop to very low, remove 消费者 顾虑, is FDA 一直 to 1986 year 才撤销 1975 year 建议, also heavy new 肯定 PVC food packaging safety property, is need combined FDA for chlorine ethylene degree requirements （51FR4173）. according to for Delancy strip/profile understanding 释, FDA 并不认 is in hard PVC packaging in a small amount of chlorine ethylene mono for type and ring generate effect/influence.

绝 large more 数接触 food PVC packaging materials is soft 质, more is film, has PVC coating. this category of packaging safety property again by FDA 认 is has issues. must ensure using/adopting increase agent is safety.

according to Ficken理论, small separation from plastics or through plastics expand dispersion function is local solvent polymer steps 进行, in pipe/tube and food packaging materials device upper concentrated degree degree, is solvent 质运动 provide force. balanced 时迁移 speed rate is time 平方, temperature degree and concentrated degree 函数, main/primary made factors is concentrated degree. from and 实际考虑设置 concentrated degree low 限, low 于此, has obvious function, experiment/testing already 经肯定理论 forecast. in hard 质PVC in chlorine ethylene concentrated degree low 于1.0×10-6 or more small 时, in water in concentrated degree will low 于实际 testing degree 1 or 2×10-9; in non water food solvent agent in low can 测定限 degree 约1.0×10-9. has in 存储时 夸 large lower, can can to small 于1.0×10-6 function.

will production PVC resin in container inner long 期储存 rear, in 自由空间 in chlorine ethylene concentrated degree ultra- 出OSHA indicators, 即0.5×10-6. if 工人进入 used for or material and 槽车, 应当予以通风 or belt/tape upper 呼吸面罩. bag product or 运输车辆稍 good, usually has 足够自然通风就 can anti ultra- standards 暴露. is, in a large amount of bag material 密闭场 也 has ultra- 标 can can.

in mixed process in, especially is in add hot and stage/phase 会释放 certain chlorine ethylene, through this steps will 失 1/3~2/3残存 chlorine ethylene. if in increase agent or in mixed more in high temperature lower as, more more chlorine ethylene; if is 一部操 as, formed hard 粒, chlorine ethylene less.

in use water pipe fittings in, production factory 自行提出 products standards, its in chlorine ethylene content large 于10×10-6. upper, usually resin low 于10×10-6, therefore in mixed rear need again testing is ultra- 标. pipe/tube use and general purpose resin in 交货时常远 low 于5×10-6, a small amount of chlorine ethylene in mixed process in 释放出. need 足够 通风 use control powder and add hot increase agent and stabilizer odor. using/adopting extrusion machine 以1t/h speed rate processing has 2.0×10-6 chlorine ethylene resin 时, chlorine ethylene large 约1g/h, speed rate 约6m3/h就足够.