● Appearance quality
The standard requires that the non stick coating inside the pot should be smooth, and the color, covering power, and gloss should be basically uniform and consistent, without bubbles or peeling. It also requires that the coating should be completely hot-melt, without obvious defects such as dirt, cracks, and bursting points.
● Handle load strength
The standard requirement for double handled pots is W=1/2W1+3/2W2, while for single handled pots it is W=W1+3W2 (note: W=load force, Wl=self weight of the specimen, W2=maximum water holding capacity of the specimen). ）After testing, the handle bracket remained secure, did not deform, and the handle had no cracks.
● Thickness of substrate material
The base material of the product should be selected from aluminum and aluminum alloy materials that can meet the performance requirements of the product. The minimum thickness of the base material is 1.8mm and 2.0mm respectively. There are two aspects to consider when specifying the thickness of the base material: first, considering that the product has a certain strength; The second is to protect the non stick coating. A non stick pot used on a gas stove, if the base material is thin, will reduce the transverse heat conduction area of the bottom metal of the pot, causing uneven heat distribution and resulting in hot spots. If these hotspots exceed the coating's tolerance, they will cause permanent damage to the non stick coating and shorten the service life of the non stick pot.
● Non stick coating thickness
The standard requires the average thickness of frying pans and stir fry pans to be greater than or equal to 25 microns; The average thickness of the boiling pot and milk pot is greater than or equal to 20 microns. This is an important indicator of non stick pans, which can affect the service life and performance of non stick pans. In addition, non stick pans need to undergo surface sandblasting cleaning before coating to increase surface roughness and adhesion, thereby enhancing adhesion strength and scratch resistance.
● Adhesion fastness
Standard specifies:
① Immerse the sample in boiling water and boil for 15 minutes before removing it. Allow it to cool naturally to room temperature and then dry it with a soft cloth.
② Use a sharp single-sided blade tip and a steel ruler or specialized scratch template to scratch 11 parallel scratches on the coating that are 2.4mm apart and 38mm long. Repeat the above steps in a direction perpendicular to the scratches, and the blade tip must penetrate the coating to the metal.
③ Attach a single-sided transparent pressure-sensitive adhesive tape to the scratch area, with the tape direction parallel to a set of scratch lines. Rub the tape vigorously with your nails to remove any air from the adhesive area and achieve maximum adhesion with the coating.
④ Hold one end of the tape with your fingers and quickly pull it up at a 90 ° angle for 3 consecutive times, using new tape each time.
⑤ Rotate the scratch 90 ° and repeat steps 3 and 4 with a new tape.
After the experiment, the coating in the marked area did not peel off completely. The main purpose of this experiment is to prevent coating detachment, which may affect the non stick effect.
● Scratch resistance
This is an indicator for testing the ability of coatings to resist various hard substances and the hardness, curing degree, and adhesion of the coating itself.
● Non sticky
Non stickiness is an important indicator of non stick pans, which involves the performance of the coating itself and the quality of coating curing. According to the standard, gently wipe the non stick coating surface of the sample with a soft cloth coated with vegetable oil, clean it with warm water and detergent, then rinse it with clean water, dry it, and conduct an egg frying test to identify the quality of the non stick pan.
扫码二维码关注我们
