The basic quality requirements of cosmetic bottle caps are described
The plug or gasket in direct contact with the contents shall meet the requirements of GB9687 and GB14944: lead ≤1.0 mg and potassium permanganate consumption ≤10 mg.
2. Surface treatment and graphic printing
4)Position Deviation of top pattern: using a vernier caliper with an accuracy of 0.02 mm to measure the blank width of the largest and smallest symmetrical parts of the sample; : A = (B 1-b 2)/2. The position deviation of the printing pattern center on the top to the center of the outside diameter of the bottle cap is not more than 0.5%. 6mm
7)For electroplated or sprayed surfaces, test for adhesion:
A: 3m adhesive tape: Stick to the test part twice, tear and pull at a 45-90 ° angle, and observe the phenomenon of shedding.
B:100 grid test: draw the grid with the blade on the plating surface, then use 3M adhesive tape and pull it 2 times. Do not allow more than 5% of the coating in the grid to come off
3. Assembly and fit requirements
1) When the groove is cut, the dislocation is less than 0.2 mm.
2) Matching inspection: the pipe and the outer cover are connected smoothly with the outer cover under the specified torsion without wrinkle and crack deformation, the gap between the outer cover and the pipe is less than 1.0 mm, and the hand can not be obviously scraped under the specified torsion without sliding buckle phenomenon.
3)The bottle and the cap with a suitable fit, can not make the bottle cap obvious bulge deformation, and can not make the bottle cap have obvious loose.
4)Use normal force. Do not remove the lid from the bottle.
5) the cap liner and stopper have enough toughness and good sealing, after the bottle and cap Assembly, the liner, and stopper are close to the bottle mouth and do not percolate.
6) The Assembly of a complete bottle cap at each junction should meet the design requirements.
7) Seal the applicable sample bottle and measure the opening torque with a torque meter. The opening moment is 0.5 N · m ~ 2.5 N · m
8) lift cover (small core, folding cover): small core without perforation, deformation, fracture, upper and lower cover with smooth in place, normal folding when accurate
9) The exterior dimensions shall be carried out according to the design drawings or technical contracts for the development of new products
10) The material should be consistent with the standard sample.
4. Functional test
2) Heat and cold resistance test
3) Glossiness test: the test method of comparing the glossiness of the sample with the observed angle of 45 ° at the distance of 30 cm-40 cm.
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