Shanghai Daoqin Plastics Co., Ltd.

幕 coating can in coating material in 卷入空 gas, gas spray coating very easy 卷入空 gas, in versus for relatively low wet degree conditions lower or in high temperature conditions lower spray coating very easy generate bubbles.

1, water property coating material is what 起泡?

答: is surface active property agent, dispersant, solvent agent and resin 本身都 has make bubbles formed stability can force; pure water (or pure liquid 体) is generate foam.

2, how to control experiment/testing?

答: although can use 理论计算 methods certain types chemical mixed combined material control bubbles has property, it 们却不 can use forecast its property, function, mixed combined difficult easy and other. therefore recommendation use “ rear add method ”, selection defoamer coating material as is for sample, make its to 剪切, and hot aging function, in coating rear 评定. use this type of methods can can to more more specific data.

3, defoamer defect function what?

答: tube/pipe in coating material in defoamer use amount very less, generally formulation weight 0.1% to 1% add 入, defoamer use 不当会导致 shrink 孔, shrinkage, 鱼眼, material property 差, 发花, color, filament 纹, month strip/profile and its it defect 效果. use is defoamer type type selection 错误, use amount less or more.

4, how to coating film defect?

答: through positive its formulation positive. generally application its it additives control function. 例如, if has 鱼眼(has by is is shrink 孔)出现, that 么就应当 for formulation in can factors 进行仔 fine 检查, for formulation in separation type type, concentrated degree and add methods adjustment, 而不应不 add use anti-cratering agent. positive manufacturing steps, use combined concentrated degree suitable defoamer, is 不应当 generate this coating film defect.

5, is what in formulation in recommendation use types above defoamer ?

答: mono product types defoamer, need is in manufacturing process in can more has control foam, need is in coating material in more has control foam, 二者不 can 兼, this is generally 规律. 偶尔也 has in abrasion and 调漆两 stage/phase use types defoamer 情形, need most 佳结果, is using/adopting in abrasion in use has machine silicon type defoamer, in 调漆时 use non silicon type defoamer this methods. 协同效应 in this function.

6, is what need recommendation use has machine silicon defoamer product?

答: has machine silicon defoamer product most tool property (指 modified has machine silicon, is simple 二甲基 poly silicon oxygen liquid 体). selection and add 入, for material can property has 任何不利 effect/influence, less ratio large more non has machine silicon product effect/influence need small. in manufacturing process in, in 贮存期间, in high flow or in coating 施工时, can can need tool has property.

7, has machine silicon defoamer heavy coating property how to?

答: if for has machine silicon product selection combined 适, and use amount and add methods positive 确, its heavy coating property is formed issues.

8, for factory application 说, 实验室筛选结果 is what is positive 确?

答: most important causes, is in 实验室 experiment/testing in method full 模拟实际 manufacturing conditions. can can make 实验室筛选 process and manufacturing 程序接近, in manufacturing process in 严格遵守 process requirements and quality control.