ERICHSEN 耐擦洗試驗(yàn)機(jī)494 MC主要用于評(píng)估油漆
涂層的耐擦洗性
主要用于評(píng)估油漆
涂層的耐擦洗性. 測(cè)試參數(shù)可靈活設(shè)置也可用于客戶
特殊的測(cè)試用途如測(cè)試清潔劑等.
測(cè)試原理(摘錄原標(biāo)準(zhǔn))
a) Test in accordance with DIN 53 778- 2 *)
The scrub body is a defined pig bristle brush, which
is charged with 250 g. The washing fluid is
continuously fed by a micro dosing pump. Whether
the contamination has been removed or the coating
is scrubbed through to the substrate, will be
checked after an agreed number of scrubbing
cycles.
*) withdrawn, replaced by DIN EN ISO 11998
b) Test in accordance with ASTM D 2486
The scrub body is a defined nylon brush, which is
charged with 454 g. The washing liquid is applied
manually during the test at regular intervals and in a
defined amount. For sharpening the wear effect of
the scrubbing action, a narrow thin strip of metal
sheet will be placed centrally and transversely to
the stroke direction unter the foil. The test result is
the number of double strokes up to scrubbed
through to the substrate.
c) Test in accordance with DIN EN ISO 11 998
The scrubbing body is a defined type of abrasive
pad **) loaded with 135 g, which is moistened prior
to the test only once with a defined quantity of the
washing fluid. After scrubbing strain (200 double
strokes) the mass loss per unit area of the coating
and the average layer thickness loss will be
determined.
**) Abrasive pad "3M Scotch Brite, No. 7448" can be obtained
from the local dealer.
工作原理
儀器底部螺絲可調(diào)水平,上面裝有鋼槽用于測(cè)試. 兩
側(cè)配備樣品夾緊裝置.通過(guò)精密地步進(jìn)馬達(dá)和微處理
器確保運(yùn)行速度準(zhǔn)確可靠,具有的重復(fù)性.
可旋轉(zhuǎn)的摩擦刷固定架可以同時(shí)安裝3個(gè)摩擦刷,這
樣可以同時(shí)進(jìn)行3個(gè)測(cè)試.
通過(guò)按鍵和6位顯示屏進(jìn)行操作,具有以下功能:
- 控制行程 (啟動(dòng),停止,重置),
- 設(shè)置測(cè)試參數(shù) (摩擦速度, 路徑,摩擦次數(shù)),
- 可存儲(chǔ)最多20個(gè)測(cè)試程序。