Shanghai Daoqin Plastics Co., Ltd.

industry: water property coating material, property coating material

摘 need: coating material fine degree is material, filling material in coating material in dispersion degree types amount degree. in experiment/testing conditions lower, through standards fine degree sheet/plate upper obtain 读数, 该读数 table/sheet fine degree certain 处凹槽 deep degree, mono generally micron table/sheet 示.

刮 sheet/plate fine degree method testing principle, is utilizing sheet/plate fine degree upper 打楔形沟槽 will coating material 刮出一 楔形层, use 肉眼辨别 wet film inner pellets significantly 位置, 以 出 fine degree 读数. effect/influence coating material fine degree degree factors has lower 几点:

一, 刮 sheet/plate degree

刮 sheet/plate 仪槽两边 is will belt/tape 一定 误差. simple testing sheet/plate methods, use combined 格 刮刀, will good coating material upper toward lower lower, if can 刮净不挂 coating material, generally can its surface is 平面; if rear 邻近槽边 surface can 刮净, relatively surface 位置刮不净则判定 is in high; is in 凹. if rear 槽两边 surface upper has 花纹, 则说明刮 sheet/plate upper surface is 一平面.

二, 刮刀平直 degree

刮刀 刀刃平直 degree according to requirements, 刮刀 刀刃平直 degree 允许误差 is 0.002mm/ full long. is to 刮刀平直 degree indicators, has production 商 刀口 abrasion formed and 刀身垂直 small 平面. this type of use is 垂直握刀刮 lower, specific as in has 一定 误差, 理想 刮刀边缘应 abrasion formed 15°弧 degree, 以避免 this type of 误差, generally degree small, 刀锋锋利, fine degree low, 反之亦然.

三, 操 as property

testing front separation Sample, has table/sheet property Sample; generally liquid degree and fine degree formed ratio, liquid degree low, solvent agent 挥发越 fast, make pellets easy 显露出; solvent agent speed degree fast, fine degree value high; testing 时, 刮刀应尽 amount maintain 垂直, toward rear 倾斜, fine degree value small, toward front 倾斜, fine degree value large, testing di use force need uniform; due to testing front Sample 往往会 空 gas belt/tape bubbles, gas bubbles in fine degree upper 显现出, formed 读数误差, therefore rear Sample 应放置一段 time, bubbles again 做实验; testing coating material more project 时, testing fine degree.

四, external ring effect/influence

testing fine degree ring need maintain 无飞尘, and other material 应事先准备 good. ring temperature degree can low, upper testing fine degree and temperature degree, temperature degree 无关 观点欠妥. most good in standards temperature wet degree conditions lower testing.

结语: fine degree and coating material formed film quality, color, gloss, resistant property, stability property and other has 密切 关系. fine degree small, coating material coating film color uniform, surface 平整, gloss good, but also process in material easy generate 沉淀, block and other phenomenon.