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Inspection Method for Stainless Steel Insulated Water Bottle
The stainless steel insulated water bottle is made of double layered stainless steel inside and outside. The inner and outer shells are welded together using welding technology, and the air inside the interlayer between the inner and outer shells is extracted using vacuum technology to achieve vacuum insulation effect. The quality of stainless steel insulated bottles is determined by inspection. So how to inspect stainless steel thermos bottles? This article will provide a detailed introduction to the inspection methods and standards for stainless steel thermos bottles.
Table of Contents
I. Inspection standards for stainless steel insulated water bottles
Thermal insulation efficiency: Thermal insulation efficiency is the core indicator of insulated containers.
Capacity: The capacity of an insulated container is not only related to the ability to hold enough items, but also directly related to the degree of insulation, that is, for the same diameter, the larger the capacity, the higher the required degree of insulation. So the positive and negative deviations of the capacity of the insulated container should not be too large.
Hot water leakage: The quality of insulated cups is related to safety and affects the aesthetics of the usage environment. To check if there are serious issues with the quality of the insulated cup, simply lift the cup filled with water. If hot water leaks between the cup liner and the cup shell, whether the amount is large or small, it indicates that the quality of the cup cannot meet the standard.
Impact resistance: The high quality of stainless steel insulated water bottles directly affects the service life of insulated cups. During the use of the product, it is inevitable that there will be bumps and impacts. If the material used for the product accessories has poor shock absorption or the accuracy of the accessories is insufficient, there will be gaps between the bottle liner and the shell. The shaking and bumps during use may cause displacement of the asbestos pad, cracks in the small tail, and affect the insulation performance of the product. In severe cases, it may also cause cracks or even breakage in the bottle liner.
II. Simple Inspection Method for Stainless Steel Insulated Water Bottles
Simple identification method for thermal insulation performance: Pour boiling water into a thermos cup and tighten the bottle stopper or lid clockwise for 2-3 minutes. Then touch the outer surface of the cup body with your hand. If there is obvious warmth on the cup body, especially at the bottom, it indicates that the product has lost its vacuum degree and cannot achieve good insulation effect. The bottom of the insulated cup is always cool. Misconception: Some people use their ears to hear if there is a sizzling sound to determine its insulation performance, but their ears cannot tell if it is vacuum.
Sealing performance identification method: After adding water to the cup, tighten the bottle stopper or cup lid in a clockwise direction, place the cup flat on the table, and there should be no water seepage; The screwing in and out of the cup (pot) lid and cup mouth should be flexible without any gaps. Fill a glass of water and invert it for four to five minutes, or shake it vigorously a few times to verify if there is any water leakage.
Plastic accessory identification method: Food grade new plastic features: low odor, bright surface, no burrs, long service life, and not easy to age. The characteristics of ordinary plastic or recycled plastic are: strong odor, dark color, many burrs, and easy aging and breakage of plastic. This will not only affect the service life, but also affect the hygiene of drinking water.
Capacity simple identification method: The depth of the inner liner is basically the same as the height of the outer shell, with a difference of 16-18mm, and the capacity is consistent with the nominal value. Some domestic brands add sand and cement blocks to the cup in order to cut corners and make up for the weight loss of materials. Misconception: A heavier cup doesn’t necessarily mean it’s good.
Simple identification method for stainless steel materials: There are many specifications for stainless steel materials, among which 18/8 indicates that this stainless steel material contains 18% chromium and 8% nickel. Materials that meet this standard and comply with national food grade standards are green and environmentally friendly products that are rust resistant and corrosion-resistant. The color of ordinary stainless steel cup body appears white or dark. If soaked in 1% saline solution for 24 hours, rust spots will appear, and some of the elements contained in it exceed the standard, directly endangering human health.
The appearance recognition method of cups. Check whether the polishing of the inner and outer surfaces is uniform and whether there are any scratches or dents; Secondly, check whether the welding at the mouth is smooth and consistent, which is related to whether the feeling when drinking water is comfortable; Check if the internal seal is tight and if the plug matches the cup body; Look at the rim of the cup, the rounder the better.
Check the label and other attachments of the cup. Check if the product name, capacity, caliber, manufacturer name and address, standard number used, usage method, and precautions during use are indicated. A manufacturer that values quality will strictly comply with relevant national standards to indicate the performance of their products.