Overview
The putty scraper is a QNG model product designed and manufactured by SHIBO according to the coating and scrapping method in GB1727 "film general preparatory method". The instrument is suitable for uniformly preparing putty film and thick paint film on various substrates (tinplate, steel plate, Aluminum Panel) to prepare for measuring the general performance of the film.
Features
1. Structural design composed of baseplate, membrane frame and drawdown blade
2. Standard templates with three different Film thicknesses (1 +/- 0.05mm, 0.7 +/- 0.035mm, 0.5 +/- 0.03mm)
3. Free choice of film thickness according to product standards
4. The baseplate is equipped with fixing screws, which can firmly fix the membrane frame
5. Comply with GB/T1727 execution standards
Principle
After fixing the film frame on the baseplate, press and scrape with a drawdown blade to obtain a uniform putty film thickness. Due to the different compositions in the paint, the dry-film thickness formed when the wet-film becomes Dry-Film is also different, so this should be fully considered when choosing to use the standard Film thickness film frame.
Applications
Film performance test, putty film preparatory, thick paint film preparatory
Steps
1. The surface preparation of the baseplate: tinplate or steel plate with No. 0 emery cloth or No. 200 water sandpaper sanding derusting, cleaning with solvent and wiping; Aluminum Panel cleaning with solvent and drying
2. Put the test plate on the base of the putty coating scraper, select the standard film frame according to the requirements and place it on it, and press the template with swirl/spin compression screws
3. Use a metal drawdown blade to evenly scrape the putty on the substrate from front to back
4. Loosen the pressing nut, remove the standard template, and place the scraped putty sample flat at constant temperature and humidity or in the drying oven
Notice
• The instrument should be placed in a drying place to prevent corrosion damage
• Regularly proofread the standard film frame Film thickness, if it exceeds the tolerance requirements should be replaced
• When not in use for a long time, protective oil needs to be applied to prevent corrosion
• Clean with gasoline or solvent after use
• drying conditions according to product standards, constant temperature and humidity conditions are 25 +/- 1 ℃, relative humidity 65 +/- 5%
• Metal drawdown blade long-term coating will produce abrasion, need to pay attention to Film thickness changes
