Tinplate (SPTE, tin-coated iron) is the common name of cold-rolled electroplated tin sheet, which refers to the cold-rolled low-carbon sheet steel or steel strip coated with commercial pure tin on both sides. Tinplate sheet,Tinned iron plate,cold rolled low carbon sheet steel,electroplated tin sheet steel Shandong Fengbao Metal Products CO.,LTD. , https://www.fbsteelpipes.com
Characteristic advantage
1.Light permeability
In addition to triggering deterioration reactions in foods, light also causes changes in proteins and amino acids. The exposure of vitamin C to light makes it easier to interact with other food ingredients, resulting in a large loss. According to research and analysis, the loss of vitamin C in transparent glass bottles of milk is 14 times higher than that in dark bottles of milk, light will also cause milk to produce oxidative smell, as well as nuclide, methionine and other cracking and loss of nutritional value, tinplate can opaque light makes the highest preservation rate of vitamin C.
2.Good sealing
The barrier of packaging containers to air and other volatile gases is very important for the preservation of nutrients and sensory quality. The comparison of various juice packaging containers showed that the oxygen permeability of the container directly affected the Browning and vitamin C preservation of the juice. The preservation of vitamin C is better in metal cans, glass bottles, aluminum foil glue layers and cartons with low oxygen transmission rate, of which iron cans are the best.
3.Reduction of tin
The tin in the inner wall of the tin plate will interact with the oxygen remaining in the container during filling, reducing the chance of the food ingredients being oxidized. The reducing effect of tin has a good preservation effect on the flavor and color of light colored fruits and juices, so the juice cans filled with unpainted iron cans have better nutritional preservation than those filled with other packaging materials, and the Browning change is slight, the acceptance of flavor quality is better, and the storage period is extended.
Use
The application of tinplate is very wide, from as food and beverage packaging materials to grease cans, chemical cans and other miscellaneous cans, the advantages and characteristics of tinplate provide content in the physical and chemical properties of good protection.
Zhuhai Testing Institute successfully developed elevator door door lock mesh depth detector
[ Instrument network instrument research and development ] Recently, Zhuhai Testing Institute successfully developed contact-based displacement sensor and electromagnetic induction on-off detection switch based on the research project of the former Guangdong Provincial Bureau of Quality and Technical Supervision "Research on the elevator door door engagement depth detecting device". The principle of the elevator floor door lock engagement depth detector.
In the daily maintenance and inspection process of the elevator, the door system is usually the target of hidden dangers. The elevator door lock is an important part of the door system. If the fault occurs, the elevator car may be in the unlocked area, and the landing door is accidentally opened. The accident caused the personnel to fall into the hoistway. Therefore, the depth of the hook hook engagement is an important indicator of the door door lock inspection, which is of great significance for ensuring the safe operation of the elevator. At present, the existing detection methods mainly test the engagement depth of the door lock by the steel ruler, and there are cases where the subjective judgment is random and the test precision is low, and the problem that the door lock circuit is turned on and off is not well judged.
The detector is convenient to use the fashion clip, adopts the single chip as the processing core, can automatically recognize the moment of the electrical contact of the door lock, and automatically displays the meshing depth value through the LED display, which is easy to operate, has high test precision and relatively low cost. Has a good practical value and promotion and application prospects.
(Original title: Zhuhai Testing Institute successfully developed elevator door door lock mesh depth detector)