涂層附著力測試儀 
為滿意的涂裝質(zhì)量，涂層粘結(jié)在被涂裝的底材上。有三種不同的附著力測試方法來評估涂層在底材上剝落的能力。劃格試驗又被稱為劃格法，使用刀片切割涂層至底材。至少以 90° 夾角十字切割兩次，得到一個直角格子圖案。觀察十字切割區(qū)域是否有脫漆現(xiàn)象。第二種涂層附著力測試方法使用針型劃針或環(huán)型劃針，在被測涂層上逐漸加大作用力，直至涂層剝離底材。第三種方法稱為拉開法附著力試驗，測量將涂層從底材上拉脫下來的拉張應力大小。將膠粘柱塊粘合到涂層表面，在粘合劑完全固化后，將膠粘柱塊連接到載荷夾具。在垂直方向上逐漸增加張力，直至膠粘柱塊下方的涂層從底材上分離。記錄下導致涂層脫離所需力的。 

霍夫曼劃痕硬度儀是經(jīng)濟實用的涂層附著力測試儀。 

尺寸小，適用于現(xiàn)場或工廠測試 
設(shè)計靈活，可以施加過2400克的力 
易于使用和操作 

基本配置: 
1塊標準大游碼 
1塊標準小游碼, 另加一個刮劃工具 
攜帶箱 
操作手冊

 

Hoffman Scratch Hardness Tester

Article No. 1610

Hoffman Scratch Tester
Adhesion tester for scratch and mar resistance

 

Features

The Hoffman Scratch Hardness Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings.

• Small size for in the field or plant testing
• Flexible design – can apply more than 2400 gram force
• Easy to use and operate

 

Procedure

To operate, attach riders to the scale arm at the numbered positions. The carriage is held down firmly by hand and moved in the opposite direction, to cause a trailing scratch. The large standard rider loads 100 g per division, while the small rider loads 25 g per division. This small rider may be used for making low-range measurements involving small increments of pressure, or it may serve as a vernier with the large rider in making more precise medium-range measurements.

Scratch Hardness
The force necessary to cut through the film to the substrate.

Adhesion
The force required to scrape a path through the film, when the stylus begins its motion on an uncoated portion of the panel.

 

Technical Attributes

 

General

• Weight

  0.7 kg

• Weight

  1.5 lb

• Dimensions: L x W x H

  28 x 2.5 x 3.8 cm

• Dimensions: L x W x H

  11 x 1 x 1.5 in
  
   

 

Delivery Content

Tester
Large Rider (1612)
Small Rider (1613)
Scratching tool (1611)
Manual
Carrying case