The cosmetic bottle cap is one of the main container accessories in the cosmetic package material, its shape and the plastic bottle, the glass bottle, the hose and so on container combination, thus effectively protects the content the security and the consumer's application experience, cosmetic bottle cap can be divided into ABS cap, PP cap, acrylic cap, aluminum cap, aluminum-plastic combination cap, according to the process can also be divided into plating cap, blow molding cap, according to product modeling and structural application can be divided into butterfly cover, Qiangqiu cover, screw cap and so on. The content of this article is only for the procurement of quality friends in the community reference.

1.Appearance quality requirements

1.1: Cap Shape: complete, full, no obvious Dent, Burr, batch front, no obvious crack surface no perforation

1.2: The surface is smooth, clean, no Burr on the cover, no scratch on the coating, no scratch on the coating, no obvious shrinkage, no sand hole.

1.3: even color, tonal clear, bright solid, not straight dew color, string color soft run, natural friction and use of solvents (such as water, agent) rub does not fade. The glossiness is within the upper and lower limits

1.4: The surface of the component is clean, complete and without any defects, no obvious burrs, Flash, warpage and impurities.

1.5: the liner is smooth, no natural off phenomenon. Radial Notch ≤0.6 mm.

1.6: No black residue, plastic burr, dust and other impurities can be adhered in the finished cover.

1.7: the bottle cap material should be non-toxic, no odor, do not dissolve in water or emulsion content.

The plug or gasket in direct contact with the contents shall meet the requirements of GB9687 and GB14944: lead ≤1.0 mgl and potassium permanganate consumption ≤10 mgl.

2.Surface treatment and graphic printing

2.1:Explanation of color difference: there is no obvious color difference compared with the sample, and there is no color separation in the range of upper and lower limit, the object and the standard sample were detected by the method of color comparison with the standard sample at the viewing angle of 45 ° at the distance of 30 cm-40 cm.

2.2: pattern, text clear and complete, standard correct font, printing tone clear, clear, no obvious missed print, scratch, no pattern should be no extra printing.

2.3: When the bottle cap is coated, the hardness of the coating is not less than 2h pencil hardness

2.4: Position Deviation of top pattern: using vernier caliper with 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

2.5: The height of the cover shall be measured with a precision of 0,02 mm, and the Vernier scale, groove and hobbing depth shall be measured with a projector and a reading magnifying glass.

2.6: The height deviation of printing pattern bottom margin is ± 0.20 mm, the joint dislocation is not more than 0.30 mm, the joint overlap is not more than 1.5 mm, the joint has no gap.

2.7: For electroplated or sprayed surfaces, test for adhesion:

1)3m adhesive tape: Stick to the test part twice, tear and pull at 45-90 ° angle, observe the phenomenon of shedding.

2)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

3.1. When the groove is cut, the dislocation is less than 0.2 mm.

3.2. 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.

3.3. 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.

3.4. Use normal force. Do not remove the lid from the bottle.

3.5 the cap liner, stopper to have enough toughness and good sealing, after the bottle, cap assembly, the liner, stopper close to the bottle mouth and do not percolate.

3.6. the Assembly of a complete bottle cap at each junction should meet the design requirements.

3.7. Seal on 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

3.8.lift cover (small core, folding cover) : small core without perforation, deformation, fracture, upper and lower cover with smooth in place, normal folding when accurate

3.9. The exterior dimensions shall be carried out according to the design drawings or technical contracts for the development of new products

3.10. material should be consistent with the standard sample.

4. Functional test

4.1 Sealing test:

Fill the contents in the bottle with the cap to the standard capacity. After sealing the cap, place it horizontally or upside down for 60 minutes, no leakage.

Enter the vacuum electrothermal drying box sealed test box, no leakage of liquid phenomenon

After the cap is assembled, shake the bottle around 45 degrees for 6 times and Pat the bottom of the bottle 3-5 times.

4.2 Heat and cold resistance test.

4.3. 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.