Standards should be smooth pan non-stick coating , color, opacity , gloss should be substantially uniform , no bubbles , no shedding , also called hot melt coating should be completely , no dirt , cracks and other obvious defects explosion point .
Second, handle the load intensity
Standard requirements for double handle pot is W = 1/2W1 +3 / 2W2, while Saucepan is W = W1 +3 W2 ( Note : W = load force , Wl = specimen from gravity , W2 = maximum capacity of the specimen water gravity . ) after testing , the handle bracket is not loose , no distortion, no crack handle .
Third, the thickness of the base material
Product matrix material should be used to meet the performance requirements of the aluminum products and aluminum materials . Frying pan , wok base material thickness of 2.0mm and a minimum 2.5mm; pans , sauce pan base material a minimum thickness of 1.6mm and 1.8mm. Thickness of base material required two considerations : First, consider the product has a certain strength ; two is to protect the non-stick coating. A non-stick pan on the gas stove to use, if the matrix material is thin, metal pot will reduce lateral heat conduction area , resulting in uneven heat distribution , which appeared hotspot. If you exceed these hot coating tolerance level , non-stick coating will cause permanent damage and shorten the life of non-stick pan .
Third, the non-stick coating thickness
Standard frying pan , wok average thickness of greater than or equal to 25 microns; pans , sauce pan average thickness of greater than or equal to 20 microns. This is an important indicator of non-stick pan , non-stick will affect the life and performance. Another non-stick coating is needed before the blast cleaned surface , increasing the surface roughness and increase adhesion, thereby increasing the adhesion fastness and scratch resistance .
Fourth, the adhesion fastness
1 , the sample was immersed in boiling water and cook for 15 minutes out, naturally cooled to room temperature with a soft cloth.
2, with a sharp single blade tip and steel ruler or template dedicated Hatch scored 11 on the coating 2.4mm length 38mm apart parallel scratches , and then along the direction perpendicular to the scratches repeat the above steps , tip must penetrate the coating to the metal .
3, with a single-sided pressure-sensitive adhesive tape adhered to the transparent scratch area, taping direction parallel with a set of scribe lines . Friction force with a nail adhesive tape, adhesive tape at the extermination of the air, and associates it with the maximum degree of coating adhesion .
4, with a finger pull tape , press 90 ℃ angle quickly pull up continuously for 3 times, each time with a new tape is required .
5, the scratches rotate 90 ℃, a tape , a new repeat steps 3 and 4 .
After the test, the coating is not the whole area zoned grid cell shedding. The trial is to prevent coating off , thus affecting the non-stick effect .
V. scratch resistance
It is tested against a variety of rigid materials cut the coating ability and hardness of the coating itself , the degree of cure , adhesion indicators.
Six , not sticky
Non-stick cookware is an important indicator that relates to the performance of paint itself , but also related to the quality of the coating curing . According to the standard , the sample stick with vegetable oil with a soft cloth to gently wipe the non-stick coating surface with warm water and detergent , then washed with water , dried eggs after the test , which does not identify non-stick sticky pros and cons.