Caitu shrinkage is the source of what caused: caitu _ caitu manufacturer - hair Steel Co., Ltd. Shandong Public | Published: 2014-8-23 | Views: 9 caitu shrinkage is caused by how a light whole crack, hemp fringes 1. Causes: uneven substrate, the board has a groove after painting bubbles stay in the groove, but after entering the curing oven, warming expansion bubble burst. 2. Shape: ◎ 3. Solution: reduce the film thickness; reduce viscosity; increase paint leveling; increasing the coating roller and support roller pressure. Second, paint thinner 1. divided into two two, thinner and slow drying agent (more common), slow drying agent is not suitable for rapid heating, otherwise there will be needle-like craters. 2. Shape: ○ (under the microscope) needle-like 3. Solution: understanding is thinner characteristics, plus a reasonable use. Third, the board set the plate unreasonable temperature curing of the first paragraph 1. Tu Jing Wen played a decisive role in the first paragraph of about 170 ℃. 2. Shape: ditto 3. Solution: Set a reasonable temperature of the plate. Four, when higher viscosity 1. viscosity, paint leveling is poor. 2. :( dot shape) but not rupture or rupture to form a pinhole shape. 3. Solution: lower viscosity, reduced film thickness. Five, the paint containing water, oil immiscible liquids. 1. These debris by roller coating to the surface of the plate color coated paper, after curing baking evaporate. 2. Shape: Irregular 3. Solution: put an end to water, oil, paint easy to enter in the matter. PVDF fluorocarbon coating on the quality of laboratory test sample Shandong color coated paper, conducted on-line sample debugging qualified after their performance. Take each volume are painted head and capuchin online performance testing. The main performance requirements: gloss ≥20, on the surface of the film thickness ≥20μm, pencil hardness ≥HB, solvent resistance, T bending, impact and other performance testing standards to meet the Q / BQB440-2009 standard (see Table 1). On-line test sample applied to take 200m coatings do performance testing volume picture painted coating performance indicators pass the crown Chau color coated paper, can be carried out even painted. PVDF lime production unit at a speed of 45m / min, with the temperature test paper plate temperature, in order to achieve early fluorocarbon coated plate refined product temperature requirements, and this table 1 Q / BQB440-20097.2.7 other color coated steel sheet and strip 3.2 performance on-line coating technology requirements while adjusting the drain of fine materials Tu Tu heads roll and applicator rolls speed ratio to achieve the thickness of the bottom surface coated fine requirements. If the film thickness does not meet the requirements, will first be appropriately increased head clearance Tu Tu Jing Ji applicator roller and roll; if still can not meet the requirements of the film thickness, and then the head of Tu Tu Jing Ji feed rolls ratio by 0.45 raised to 0.50, which can meet the requirements of PVDF film thickness lime finish. Binzhou color coated coil, color coated coil Gannan, Jinhong Run steel provided by Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry. Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) strong, credible, Shandong Binzhou board (with) wood industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinhong Run steel and you hand into the brilliant, for a better future! You can also access (www.bxjhr.com/supply_details_47004190.html), for more information about the company.