Shanghai Daoqin Plastics Co., Ltd.

in PVC and CPVC processing system in, lubricant selection 往往直接 effect/influence processing stability property, products appearance and overall formulation 窗口. how to in "足够 lubricated " and "不 degree lubricated " between balanced, is formulation optimization key/critical.

Sasolwax A28, as is 一款 oxidation type wax （Oxidized Fischer-Tropsch wax）, positive is this core issues development.

一, from structure 出发: belt/tape " can lubricated "

Sasolwax A28 由羧 acid, ester and alcohol type formed, tool 备一定极 property, this structure belt/tape and 传统石 wax or PE wax different is:

• function wax in 极 property 基团（如羧基, ester 基） make its can more good and PVC/CPVC melt versus function

• meanwhile provide outer lubricated and inner lubricated function

• has 效避免 non oxidation wax Common lubricated issues

in processing in, this type of " can property " has 助于:

• decrease/reduce 析出（plate-out）

• reduce 模口流涎（die drool）

• improves overall processing stability property

拓 wide processing 窗口, let extrusion more stability

in high output/production volume extrusion （如 pipe/tube, type 材） in, processing wide narrow effect/influence production efficiency and property. Sasolwax A28 一 important function in 于: 适 degree melt combined （fusion）, reduce 扭矩峰 value （torque spikes）, improvement melt uniform property , this make its in high extrusion conditions lower, can 够帮助 system more add 平稳.

二, and metal system 协同效应

Sasolwax A28 in acid property 基团, can and Common stability system 发生协同 function, 例如:

• hard acid 钙（calcium stearate）

• 钙 zinc stability system （Ca-Zn stabilizers）

this type of belt/tape is: improve/increase lubricated efficiency, in more low add amount lower achieve same more excellent 效果. from formulation degree 看, this more high active property and optimization 空间.

stability can forecast property can 源

Sasolwax A28 一 key/critical indicators is its acid value control in 26-30 mg KOH/g, distribution scope/range relatively narrow （典 type value 约 28）. this features belt/tape in 于:

• property can more 一致

• batch more small

• processing performance more can forecast

meanwhile, relatively high acid value has 助于 more fast melt combined speed degree （fusion time）, is pipe/tube and pipe fittings provide more good force property can adjustment 空间.

key/critical data : in same acid value conditions lower, oxidation wax melt combined time ratio oxidized polyethylene wax more short.

in PVC/CPVC in performance

according to application and testing 反馈, Sasolwax A28 in processing in performance 出:

• reduce melt pressure

• more stability and pressure 曲线

• extrusion products surface more add light slip

in CPVC system in, also to:

• more high tensile property can （tensile）

• more high heat deflection temperature (HDT) （HDT）

三, processing and substitute/replace value

Sasolwax A28 suitable for:

• hard PVC（Rigid PVC）

• CPVC

• other polymer processing system

meanwhile tool 备: can as is  LD-OxPE or HD-OxPE substitute/replace solution/scheme , in separation system in can achieve more low add amount.

key/critical material property 一览

结语

当 PVC/CPVC processing more high stability property and property requirements stage/phase, lubricated system again is " additives ", is processing performance important amount.

Sasolwax A28 价 value, in mono property can improves, in 于:

• in lubricated and melt combined between balanced

• in efficiency and stability between provide 空间

• in formulation in belt/tape more high can property

this is formulation optimization provide more tool property selection.

lubricated can 控, stability more excellent.