Shanghai Daoqin Plastics Co., Ltd.

injection molding process conditions:
drying 处理: processing front drying is must. wet degree must low 于0.04%.
建议 drying conditions is:
伊士曼PETG drying temperature degree is 70~75℃, 4-6 small 时, attention/notes drying temperature degree need ultra- 75℃. screw temperature degree: 220~250℃.
Korea SK PETG drying temperature degree is 60~65℃, 4-6 small 时, attention/notes drying temperature degree need ultra- 65℃. screw temperature degree: 220~290℃.
mold temperature degree: 10~40℃, is 25℃. injection pressure: 300~1300bar.
injection speed degree: in 不导致脆化 front lower can use relatively high injection speed degree.
chemical and material features: PETG is transparent, non 晶体材 material. 玻璃化转化 temperature degree is 88C. PETG injection molding process conditions scope/range ratio PET need 广一, tool has transparent, high strength, high property comprehensive features.

PETG application scope

PETG is full new transparent engineering plastics series, PETG property can can is: tool has tool has good transparent property, hardness, chemical resistant agent, and resistant force whitening can force and other and other features. light transmittance 达91％, to has machine transparent, impact property tough property good 接近甚至 ultra- polycarbonate (PC). combined injection molding, 挤塑, processing. PETG application scope: product packaging container, packaging and medical transparent parts, and 人护理 product, and tool, home appliances and small home appliances transparent parts, toys, day use product, 灯饰, bottle, transparent pipe/tube and type 材, film, sheet/slice 材, sheet/plate and other field/area. PETG is types non crystallization type copolymer polyester, copolymer in CHDM increase, melting point decline, 玻璃化 temperature degree upper rise, crystallization degree decline, most rear formed 无定形 polymer. PETG brief is types transparent plastics, is types non type copolymer ester, PETG commonly used copolymer mono is 1,4- ring 己烷二甲 alcohol (CHDM), full is polyethylene terephthalate (PET) -1,4- ring 己烷二甲 alcohol ester. it is for 苯二甲 acid (TPA), ethylene glycol (EG) and 1,4- ring 己烷二甲 alcohol (CHDM)三 types mono use ester method polycondensation material, and PET comparison more 1,4- ring 己烷二甲 alcohol copolymer mono 体, and PCT ratio more ethylene glycol copolymer mono 体, therefore, PETG property can and PET, PCT large same. tool has its features, currently full has USA 伊士曼, Korea SK两家 company technology comparison formed 熟.

   generally PETG in CHDM content in 30%-40% relatively 适宜. tool has relatively good viscous property, transparent degree, color, chemical resistant agent, and resistant force whitening can force. can very fast hot molding or extrusion blow molding. viscosity ratio acrylic (亚克 force) good. its products high degree transparent, impact resistant property can excellent, especially molding thick transparent products, its processing molding property can 极佳, can according to design 者 意图进行任意形状 design, can using/adopting extrusion, injection molding, blow molding and thermoforming and other molding methods, can widely used in sheet/plate sheet/slice 材, high property can shrinkage film, bottle use and type and other market, meanwhile its processing properties excellent 良, can 进行常规 machine processing 修饰. PETG is types non type copolymer ester, its products high degree transparent, impact resistant property can excellent, especially molding thick transparent products, its processing molding property can 极佳, can according to design 者 意图进行任意形状 design, can using/adopting extrusion, injection molding, blow molding and thermoforming and other molding methods, can widely used in sheet/plate sheet/slice 材, high property can shrinkage film, bottle use and type 材, product packaging and other market, meanwhile its processing properties excellent 良, can 进行常规 machine processing 修饰.

● 清 machine:
use PETG之 front, need use transparent PC or PS material machine, can use transparent PMMA, ABS AS material machine and other its it transparent material machine, 否则材 material in tube/pipe generate chemical reaction, product mixed color transparent.
● drying temperature degree: 65℃－70℃, 5－6/h.
●炮筒 temperature degree:
1, (Domestic machine) 230℃-260℃ 2, (Imported machine) 235℃-265℃
● hot runner temperature degree: 240℃-250℃
● mold temperature degree:
建议 use front, rear 模接冻 water or machine water cooling mold, mold temperature scope/range: 15～40℃.
●射胶 time: according to product large small, thick thin, long short as versus adjustment.
● cooling time:
此材 material cooling speed rate relatively slow, in viscosity, according to mold structure, product thick degree 设置适当 temperature degree and molding cooling time. gate demolding need design in 3-5°否则 water easy mold sticking.
●射胶 pressure / speed degree: 第一段(进胶点) using/adopting low speed in pressure, its it using/adopting in speed in pressure.
●射胶位置: according to mold structure combined speed degree pressure versus combined injection shot 位置.
● back pressure:
适当 back pressure can add strong/high material and has 帮助排 gas function, selection: 5－10kgf/cm2.
● screw speed:
relatively low screw speed can anti material temperature degree high, selection: 60－90RPM, 即60%-70%.
● screw pressure:
70%-90%（此材 material viscosity relatively high, relatively small screw pressure easy screw ）
●缓冲层:
建议 use 5－10mm 缓冲层 scope/range, 一方面 can anti material 因停留 time long degradation, 另一方面 can decrease/reduce injection molding pressure loss 失.
● 停留 time:
胶 material in in time control in 5 separation inner, ultra- 5 separation 钟应清空炮筒才 can 继续啤塑, 否则材 material easy degradation 发黄而变脆.