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Method for testing anti-sagging performance of polyurethane wood paint under construction viscosity

A wood coating, anti-sagging technology, applied in the direction of flow characteristics, instruments, measuring devices, etc., can solve the problem of not being able to judge the coating's sag resistance well, not simulating the spraying method, and not directly reflecting the coating's sag resistance. performance issues

Inactive Publication Date: 2015-07-29
NIPPON PAINT CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that when the viscosity of the tested wood coating T-4 cup is adjusted to 16s, the sag resistance of the coating cannot be well judged due to the low viscosity of the coating, so it cannot directly reflect the anti-sagging properties of the coating in the construction state. Sag performance, and this method cannot simulate the spraying method used for furniture painting
The disadvantage of this method is that the method can only measure the film thickness with a comb-shaped wet film thickness gauge, and the wet film thickness gauge is composed of teeth that are uniformly changed in steps, and the wet film thickness measured by it is It is an interval value and cannot accurately determine the wet film thickness

Method used

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  • Method for testing anti-sagging performance of polyurethane wood paint under construction viscosity
  • Method for testing anti-sagging performance of polyurethane wood paint under construction viscosity

Examples

Experimental program
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preparation example Construction

[0106] Preparation of general method test device

[0107] Prepare to spray the bracket (A), the first backing plate (B), the second backing plate (C), and the A4 tin plate (D), such as figure 1 , 2 As shown, put the second backing board (C) on the first backing board (B), paste the two boards together with a certain distance apart, paste the A4 tin plate (D) on the second backing board (C), A4 The lower end of the tin plate (D) is lower than the lower end of the second backing plate (C) in the middle, but higher than the lower end of the first backing plate (B) on the bottom surface, and the lower end of the first backing plate (B) at the bottom is placed on the spraying bracket (A) above, the test device of the present invention was obtained.

Embodiment 1

[0109] Process and steps in the present embodiment are as follows:

[0110] Take an A4 tin plate, grind the test plate according to the grinding method (according to the national standard GB / T9271-2008), place it according to the spraying device, and apply Yishili environmental protection semi-gloss wood white paint-Yong 48 version according to the construction Adjust the ratio to Tu-4 cup viscosity 16s, and spray the paint evenly from top to bottom according to the wood coating process parameters. 40-60μm, and keep the spraying time, paint output, and gun uniformity consistent; after the first pass of spraying is completed, let it stand for 3 seconds, and then spray the second pass evenly, and proceed in sequence until the bottom of the A4 tinplate plate has Stop spraying when the paint drips out; put the test panel upright in the drying cabinet and wait for the paint film to dry naturally; after the paint film is dry, use a film thickness meter to select 3-5 points to test t...

Embodiment 2

[0125] The process and steps in this embodiment are basically the same as those in Embodiment 1 above. The difference is that the Yishili Environmental Protection Semi-gloss Wooden White Paint White Top Paint is replaced by Jinzhuang Xueyan 8 Series Anti-yellowing Environmental Protection Wooden White Primer, and the anti-sagging dry film thickness of the coating is 145 μm.

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Abstract

The invention relates to a device for testing anti-sagging performance of a polyurethane wood paint under construction viscosity. Specifically, the device includes a triangle spraying bracket; the triangle spraying bracket is provided with a base, a first side surface on the base, and a second side surface located on the base and intersecting with the first side surface; a ''Z'' shaped base plate is arranged on the triangle spraying bracket; a recess is arranged near the lower end of the ''Z'' shaped base plate; and a test panel is fixed on a second base plate. The invention also provides a method for testing anti-sagging performance of a polyurethane wood paint under construction viscosity by using the device. The method solves the problem of poor pertinency of the existing test method, can effectively judge the anti-sagging performance of the polyurethane wood paint under construction condition, and is fast, simple and in line with the current furniture painting technology.

Description

technical field [0001] The invention relates to a method for testing the anti-sagging performance of polyurethane wood coatings under construction viscosity, and belongs to the technical field of coating performance testing methods. Background technique [0002] With the development of coating synthetic resin, there are more and more types of coatings, the composition of coatings is becoming more and more complex, and the coating process is gradually increasing; moreover, with the development of acrylic polyurethane coating (commonly known as PU polyester) and gas With the introduction of dry unsaturated polyester coatings (commonly known as PE polyester), the spraying process has become a widely used construction method, and manual spraying is the main method. However, in the spraying process of wood coatings, paint film defects such as sag and flow often occur, especially on furniture facades and corners, due to gravity and edge accumulation effects, it is easy to have pai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
Inventor 李守光刘松洁刘甦琪段永超周军
Owner NIPPON PAINT CHINA
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