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1. Overview
Internal decorative materials such as leather, plastics, textiles, and adhesives of bonding materials contain some volatile substances, especially under the sun, the temperature in the car rises in the car. High, which will exacerbate this volatile. The volatile gas condenses on the car window or windshield, causing poor sight, which will affect the driver's sight and driving safety; some volatile substances will be harmful to the human body and affect the health of the driver. In order to reasonably control the generation of volatile substances, it is necessary to perform atomization tests for materials used for car interior. Materials that exceed the standard indicators of the fog value will not be used for car interior.
The atomization test equipment generally follows the standard DIN 75201 manufacturing, which is divided into two test methods: gloss (A method) and weight method (B method). The measurement process is: put the material to be tested in In the special glass cup in high temperature liquids, the volatile substances in the material are condensed on the low -temperature glass plate or aluminum foil placed in the mouth of the glass. The weight before and after aluminum foil can be obtained by the test results of method B.
The atomization test equipment is not a single device in the simple sense, but consists of several equipment and many attachments. The experimental process must be completed in many links. Therefore More requirements are made.
2. Environmental requirements for laboratory construction
Automotive interior fabrication laboratory has certain requirements for environmental temperature, humidity, dust, ventilation, light, etc. Essence
The adjustment process of the sample before the test, the balance of the glass plate or aluminum foil after the fog condensation is over, all require the ambient temperature at 23 ℃ ± 2 ℃, otherwise it will directly affect the test results. Other links of the test process generally require the ambient temperature below 30 ° C.
The glass plate after condensation is required to balance the relative air humidity of 50 % ± 6 %.
The small particles in the air -dust, the impact on the experimental results is obvious. On the surface of the glass plate or aluminum foil, once there is dust attachment, it will directly lead to the error experimental result. Therefore The corresponding dust removal equipment should be equipped, and the test personnel should often wipe the desktop, equipment, and accessories with a wet cloth. In order to prevent dust from entering the laboratory, the experiments should wear isolation clothing, change special slippers, and ask unrelated personnel not to enter the laboratory casually.
When using some organic solvent cleaning experimental devices and glass utensils, a irritating odor will be produced. The ester (DOP) has mild toxicity, so the laboratory is required to have good ventilation conditions. However, when the glass plate is placed in the air after the condensation is over, the flow speed of the indoor air is required to be less than 1m/s, so as not to the glassThe luster of the board has an impact. At this time, the doors and windows and winding measures should be closed to prevent air flow in the room. Or the process of heating, volatilization, condensation, and the adjustment process of the sample and the balance process of glass plates and aluminum foil are arranged in different rooms.
The process of adjustment and evaporation and condensation of the sample, the balance process of condensed glass plates and aluminum foil, is strictly forbidden to expose the sunlight, so the laboratory is best to choose where the sun is not irradiated, or the doors and windows of the room and window There are reliable curtains and curtains to block the sun.
3. Laboratory infrastructure construction
A well -operated laboratory with the following infrastructure: experimental table, cabinet, water source and pool, power supply, power supply , Air -conditioning system, ventilation facilities, tile grounds (insulation), walls that have been treated with porcelain, etc.
The experimental desk and cabinet are used to place equipment, operating accessories, reagents, cleaning solvents, etc.
The laboratory's indoor water source and pool are necessary. The atomization experiments have a large amount of cleaning work to be completed by the pool. A convenient and reasonable design of a pool can greatly improve the work effect
rate rate rate rate rate rate. Provide reliable guarantees for the correct test results.
Air conditioning and ventilation facilities provide protection for temperature regulation and eliminating poisoning gas.
Good ground and walls are good for dust removal.
4. Preparation of laboratory experimental instruments and devices
Motor interior lid experiment requires many test equipment and operating devices, and some can be produced by atomized equipment to produce. Part of the manufacturer must be prepared by the laboratory formation unit.
The instruments and devices provided by the manufacturer of atomizing equipment are generally: high -temperature grooves, cooling control devices, samples, cups, fluorine rubber sealing rings, rubber ring fixed ring, square glass plate, round glass plate, round glass plate , Round aluminum foil, lid, square glass frame, round glass frame, sampler, gloss instrument, heat oil, benzhenylene (DIDP) DOP), dungeon positioning pads, luster meter isolation pads, sponge clips, etc. The above is listed as a device provided by domestic equipment manufacturers. The devices provided by imported equipment manufacturers are slightly a little bit. In addition, some consumer reagents provided by the manufacturers, such as DIDP and DOP, need to be purchased by the laboratory after use.
The experimental items that the laboratory itself needs to prepare is: two dryers with a diameter of 400mm, two stainless steel dumplings, a soft filter paper with a diameter of 120mm, disposable polypropylene gloves, glass washing agent, fog meter (fog meter Experiment of degree method), a balance of 0.1g, a balance of 0.01mg (weight method) with an accuracy of 0.01mg, annexed shelves, desiccant, distilled water, abandoned cotton balls, wide mouth bottle, pipe brush, 50ml cup, used for soaking glass Cup container and so on.
The items listed above are required by the atomization test, which is indispensable.
5. Training of experiment operators
A complete laboratory, in addition to the previous mentioned, also requires high -quality experiments, in the car, in the car The decorative atomization test personnel must go through the training of the following process: First of all, read the international and domestic standards of various atomization tests carefully, and should be understood and kept in mind the details involved in the standard. Secondly, you should also read the instructions of the atomization test equipment in detail to understand the structure, performance, operation methods and precautions of the equipment. It is particularly emphasized that the experiments should pay great attention to the cleaning process and strictly abide by the operating procedures. Any accidental operation will directly cause the test failure.
6. End words
Build an excellent laboratory, which requires the details of all aspects, especially the atomized laboratory due to the more devices used. The operation links are relatively complicated and put forward higher requirements for the construction of the laboratory. As long as we strictly follow the requirements of the test standards and carefully do the work of each link, we can build the car interior fabrication laboratory.
