描述

BGD 500 数字拉脱附着力测试仪

使用

为了能有满意的表现, 涂层必须粘附在其所涂敷的基材上. 在实践中, three different test procedures are used to assess the resistance of paints and coatings to separation from substrates:

Cross-Cut Test

This test method specifies a procedure for assessing the resistance of paints and coatings to separation from substrates when a right angle lattice pattern iscut into the coating, penetrating through to the substrate.

The method may be used for a quick pass/fail test. When applied to a multi-coat system, assessment of the resistance to separation of individual layers of thecoating from each other may be made.

Scrape Adhesion

This test method covers the determination of the adhesion of organic coatings such aspaint, 漆, and lacquer when applied to smooth, 平坦的(planar)panel surface.It has been found useful in providing relative ratings for a series of coated panels exhibiting significant difference in adhesion.

The materials under test are applied at uniform thickness to flat panels, usually sheet metal of uniform surface texture. After drying, the adhesion is determined by pushing the panels beneath a rounded stylus or loop that is loaded with increasing amount of weight until the coating is removed from the substrate surface.

BGD 500 数字拉脱附着力测试仪

Pull-off Test

Adhesion of asingle coating or a multi-coat system of paint, varnish or related products is assessed by measuring the minimum tensile stress necessary to detach or rupture the coating in a direction perpendicular to the substrate. This method maximizes tensile stress as compared to the shear stress applied by other methods such as scratch adhesion and results may not be comparable. The test is performed by securing a loading fixture (dolly) perpendicular to the surface of the coating with an adhesive. After the adhesive is cured, a testing apparatus is attached to the loading fixture and aligned to apply tension perpendicular to the testsurface. 逐渐增加并监测所施加的力，直到涂层材料的塞子脱落, 或达到指定值.

digital pull-off adhesion tester is a portable, 手动仪器，用于测量使用液压将指定测试直径的涂层拉离基材所需的力. 压力显示在数字液晶显示屏上，代表涂层对基材的附着力.

评价附着力 (pull-offstrength) 通过确定涂层在分离前可以承受的最大拉伸拉脱力来评估涂层的性能. 突破点, 通过断裂面证明,沿着由小车组成的系统内最弱的平面发生, 粘合剂,涂层和基材.

测试标准

① ISO 4624 《Paints and varnishes-Pull-offtest for adhesion》

② ASTM D 4541 《StandardTest Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers》

③ ASTM D7234 《Standard Test Method for Pull-OffAdhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers》

BGD 500 数字拉脱附着力测试仪

主要技术参数

■ 移动车尺寸： 20毫米（标准）；10毫米、14毫米、50毫米（可选）

■ 分辨率： 0.01兆帕(1psi)

■ 准确度： ±1% 满量程

■ 最大. 拉脱压力：Φ10mm dolly →0-80 MPa；Φ14mm dolly→0-40 MPa；
Φ20mm dolly→0-20 MPa；Φ50mm dolly→0-3.5 MPa；

■ 电源：内置可充电锂电池, 和标准配置充电适配器.
■ Adhesion Tester Size：360mm×75mm×115mm（L x W x H）

■ Adhesion Tester Weight：3公斤

■ 包装清单：

① Adhesion Tester with digital display

② 20mm铝制试验台车（20个）

③ 20mm台车的切削费用，

④ 3M胶和胶枪

⑤ Micro-USB 线

⑥ 操作手册

⑦ 手提箱