Shanghai Daoqin Plastics Co., Ltd.

production plastics products selection antioxidant and light stabilizer 应遵循 which 原则?

plastics product in production processing selection antioxidant and light stabilizer, according to plastics material types type and Model/Grade, processing equipment and process conditions, other chemical additives product types and use amount, product use ring and and other comprehensive factors, antioxidant and light stabilizer product types, how to selection industrial use antioxidant and light stabilizer, lower Shanghai chemical industry is simple introduction lower.

1. versus property

plastics polymer generally is non property, antioxidant and light stabilizer separation tool has different degree property, solvent property relatively 差. usually antioxidant and light stabilizer in high temperature lower and polymer melt combined, polymer solid antioxidant and light stabilizer separation 子包含 in polymer separation between. in formulation use amount scope/range inner, antioxidant and light stabilizer need in processing temperature degree lower 熔化, need especially attention/notes. design formulation 时, solid antioxidant and light stabilizer melting point or melt scope/range upper 限不应 low plastics polymer processing temperature degree.

2. flow property

plastics products, especially is ratio surface and ratio （ or weight ratio ） versus for relatively small transparent products oxidation reaction main/primary in products surface, this need antioxidant and light stabilizer from plastics products internal to products surface can function. is, if toward material surface speed degree fast and amount large, antioxidant and light stabilizer 会挥发 to product surface ring in or expand dispersion to and product surface other in 而流失, this in upper is can 避免, in design formulation 时就应该首先考虑 to. has antioxidant and light stabilizer product types can selection 时, selection molecular weight versus for relatively large, melting point relatively high product types, most processing conditions and use ring is front 提确定 antioxidant and light stabilizer add amount.

3. stability property

antioxidant and light stabilizer in plastics material in maintain stability, in use ring and high temperature processing process lower, loss relatively less, color or color, separation understanding （ used for processing heat stabilized property antioxidant remove outer ）, and other additives defect chemical reaction, 不腐蚀 machine equipment, easy by product surface other material 质萃取. retardant amine type light stabilizer generally is low alkali property chemical product. selection retardant amine as is plastics material in light stabilizer 时, application in 不应含 has other acid property additives, versus plastics products in acid property ring in use.

4. can processing property

plastics products processing 时, add antioxidant and light stabilizer can can 会改变 resin melt viscosity and screw 扭矩. if antioxidant and light stabilizer melting point and resin melt scope/range versus relatively large, 就会出现 antioxidant and light stabilizer or screw phenomenon. antioxidant, light stabilizer melting point low processing temperature degree 100℃ above 时, will antioxidant, light stabilizer and resin mixed combined processing product, antioxidant, light stabilizer in product in distribution 不均, 偏流导致 processing output/production volume decline.

5. ring and 健康

resistant oxidation agent, light stabilizer in plastics products processing, manufacturing and use process in, 应无毒 or low 毒, or low 尘, for and material has effect/influence, for gas, and water system 无污染. film, food packaging box/case, toys, one-time property liquid device and other or 直接接触 food, product, medical device tool and plastics products, not only need selection through USA food product tube/pipe 理局(FDA)检验批准 or 欧盟委员会 method 令允许 use resistant oxidation agent, light stabilizer product types, but also add amount 应严格 control in most high amount below/following.