The status quo and development trend of adhesive quality inspection instruments
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In the adhesive industry, foreign adhesives are widely used, and the variety of products is numerous and complete. The number of serialized products is large and growing. China's adhesive production has jumped to the third place in the world in 1999, but the output value only accounts for 7% of the world's adhesives, and the high-performance, high value-added products are not only low but also low in quality, and the varieties are single, far behind developed countries. . Due to the vast market of adhesives in China, some large foreign adhesive production companies have also moved to the domestic market.
First, Current status and problems of quality inspection of domestic adhesive products
1. There are many small and medium-sized enterprises in the adhesive industry, and the quality inspection equipment is relatively backward. A considerable number of instruments for testing quality indicators are still using the mechanical dynamometers of the 1960s and 1970s to measure the peel strength. The initial tack and stickiness testers used to test the basic indicators of adhesives are self-made products. There are also some companies that have no equipment, which is judged by the feel of the hand.
2. The implementation of the adhesive industry standards is different. Due to the wide variety of business conditions, the equipment is not the actual implementation, some only the initial viscosity, sticky index, and some only the peel strength index, some companies are not clear on the test indicators of certain adhesives, such as structural adhesives Larger products only need to stretch the shear strength, so there is no need to measure the initial stickiness and stickiness index.
3. Some enterprises have vague concepts about national standards, and all the tests are done in kind. The user sticks the wood and does it on the wood. The user sticks the glass and does it on the glass. This is simply incomparable and it is inconvenient for the industry to communicate with each other. In fact, the internationally specified indicators are made on standard test boards.
4. The utilization rate of the testing equipment is not high and does not play a greater role. A considerable number of enterprises use equipment to conduct experiments, only give experimental reports, and less analyze the experimental results to study the production process. Therefore, the use of advanced, high-precision quality inspection equipment, actively absorb and digest international advanced standards, standardize industry standards, and give full play to the role of existing equipment is the top priority in meeting the challenges of WTO entry.
Second, the introduction of advanced quality inspection equipment for adhesives
1. Initial tack tester. It is suitable for the initial tack test of pressure sensitive tapes and other related products. Adopting the international common bevel ball method, the adjustable inclination angle is 0-30°, and the standard steel ball (1/32~lin) is prepared.
2. Hold the viscosity tester. Suitable for tackiness testing of products such as adhesive tapes. Standard test board, loading plate, weight, precise timing mechanism design, and 6 sets of samples can be tested at the same time.
3. PC type intelligent electronic tensile testing machine. Suitable for 180° peeling of adhesives and 90° peeling test. The machine host LCD large-screen LCD display, PVC operation panel, high-precision speed control motor can be set to eight speeds, standard configuration HP computer, HP printer. The host LCD and computer monitor display the test process and curve throughout. Users can repair the test report and set the content according to their own requirements. The unique stripping curve automatically de-heads and tails data analysis, group test curve overlay analysis, multi-mode data past query function, allows managers to accurately grasp the control parameters and grasp the quality changes.
4. Adhesive tensile shear tester. Suitable for stretching, shearing, shearing and tearing tests of various adhesives. The test load of the machine is hydraulically dragged, and the force measurement system uses a high-precision force value sensor. The control system performs high-speed data acquisition, processing and external transmission to the test process. Configure communication cables and software for data analysis and query. The unique automatic recording test time and the end of the test show the maximum force value and test strength of the test process.