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Basic Quality Requirements For Cosmetic Tube Packaging

Update time : 2022-11-04 18:07:28

Cosmetic tubes are commonly used packaging for cosmetics, and are divided into round cosmetic tubes, oval cosmetic tubes, flat cosmetic tubes, and ultra-flat cosmetic squeeze tubes in terms of technology. According to the product structure, it is divided into single-layer, double-layer and five-layer cosmetic tubes. They are different in terms of pressure resistance, penetration resistance and hand feeling. For example, the five-layer tube consists of an outer layer, an inner layer, two adhesive layers, and another barrier layer.

01 Basic quality requirements for tube appearance

1. Appearance requirements: In principle, under natural light or 40W fluorescent lamp, the distance is about 30cm, and there is no surface bump, embossing (no twill on the tail), scratches, scratches, and burns.

2. The surface is smooth, clean inside and outside, the glazing is uniform, the gloss is consistent with the standard sample, there is no obvious unevenness, redundant stripes, scratches or indentations, deformation, wrinkles and other abnormal shapes, no foreign matter adhesion, small uneven points The number of branch hoses shall not exceed 5. If the net content of the hose is ≥100ml, 2 flowers are allowed; if the net content of the hose is less than 100ml, 1 flower is allowed.

3. The tube body and cover are flat, no drape, no damage, no thread defect, the tube body is tightly sealed, the sealing tail line is flush, the sealing width is consistent, the standard size of the sealing tail height is 3.5-4.5mm, and the same branch is soft. The allowable deviation of the height of the pipe sealing tail line is ≤0.5mm.

4. Damage (damage or rot in any position of the pipe or cover); closed mouth; the paint layer on the surface of the hose falls off > 5 square millimeters; the end of the seal is cracked; the end is broken; serious thread deformation.

5. Hygiene: The inside and outside of the cosemtic squeeze tubes are clean, and there are obvious dirt, dust and foreign objects on the inside of the tube and cover. There is no foreign matter such as dust and oil, no peculiar smell, and meets the hygiene requirements of cosmetic-grade packaging materials: that is, the total number of colonies is ≤ 10cfu, and Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus are not detected.

02 Requirements for cosmetic tube packaging surface treatment and graphic printing

1. Printing:

The deviation of the overprint position is between the upper and lower limit positions confirmed by both parties (≤±0.1mm), and there is no ghosting.

The pictures and texts are clear and complete, in line with the color of the sample, and the color difference between the tube body and its printed graphics and text does not exceed the color difference range of the standard sample.

The size and thickness of the text are similar to the standard sample, without hyphenation, silt, and no leakage, which does not affect the recognition.

The printed font has no obvious burrs, ink edges, correct, no typos, missing characters, missing punctuation marks, missing text strokes, blurred, etc.

2. Graphics and text: Overprinting is accurate, the overprinting error of the main part is ≤1mm, and the overprinting error of the secondary part is ≤2mm. No obvious heterochromatic spots and mottles

For hoses with a net content of ≥ 100ml, there are 2 spots on the front that do not exceed 0.5mm, the total area of a single tube does not exceed 0.2mm2, and there are 3 spots on the back that do not exceed 0.5mm, and the total area does not exceed 0.2mm2. ;

If the net content of the hose is less than 100ml, the front side is allowed to have 1 place not exceeding 0.5mm, the total area of a single piece is not more than 0.2mm2, the back side is allowed to have 2 places not exceeding 0.5mm, and the total area of a single piece is not more than 0.2mm2 Heterochromatic spots and mottles.

3. Position deviation
If the net content of the hose is greater than or equal to 100ml, the upper and lower offset of the printing layout shall not exceed ±1.5mm, and the left and right offset shall not exceed ±1.5mm;

If the net content of the hose is less than 100ml, the upper and lower offset of the printing layout shall not exceed ±1mm, and the left and right offset shall not exceed ±1mm.

4. Content requirements: consistent with the film and samples confirmed by both the supply and demand sides

5. Color difference: The color of printing and bronzing is consistent with the samples confirmed by both parties, and the color deviation is between the upper and lower limit colors confirmed by both parties

03 Basic requirements for tube product structure

1. Specifications and dimensions: Measure with vernier calipers according to the requirements of the design drawings, and the tolerances are within the range specified in the drawings: the maximum allowable deviation of diameter is 0.5mm; the maximum allowable deviation of length is 1.5mm; the maximum allowable deviation of thickness is 0.05mm;

2. Weight requirements: use a balance with an accuracy of 0.1g to measure, the standard value and allowable error are within the range agreed by both parties: the maximum allowable deviation is 10% of the weight of the standard sample;

3. Full mouth capacity: After filling the container with 20℃ water and the mouth of the container is level, the full mouth capacity of the container is indicated by the quality of the poured water. The standard value and error range are within the range agreed by both parties: the maximum allowable deviation is the standard sample full mouth capacity. 5%;

4. Thickness uniformity (suitable for hoses with a content of more than 50ML): cut open the container, use a thickness gauge to measure 5 places on the upper, middle and lower sides respectively, the maximum allowable deviation is not more than 0.05mm

5. Material requirements: According to the materials stipulated in the contract signed by the supplier and the buyer, the inspection shall be carried out with reference to the corresponding national industry standards, which are consistent with the sealing sample.

04 Basic requirements for hose end closures

1. The method and shape of the end cap shall meet the contract requirements of both parties.

2. The height of the end cap meets the contract requirements of both parties.

3. The end cap is centered and straight, and the left and right deviation is less than or equal to 1mm.

4. Tail sealing firmness:

Load the water of the specified capacity, put it between the upper and lower plates, the part of the cover should be moved out of the plate, and pressurize to 10kg in the middle of the upper plate, and keep it for 5 minutes. , There is no explosion or leakage at the tail.

Use an air gun to apply 0.15Mpa air pressure to the hose for 3 seconds. No tail blast.

05 Fitting requirements for hoses and fittings
1. The tightness of the fit
Torque test (applicable to threaded fitting): When the threaded cap is tightened at a torque of 10kgf/cm at the hose port, the hose and cap will not be damaged or slippery.

Cap-opening force (suitable for fitting with capped hoses): moderate cap-opening force

2. After matching, the hose and cover are not skewed.

3. After the hose cover is matched, the gap is uniform, and the gap is unobstructed when you touch it with your hand. The maximum gap is within the range confirmed by both parties (≤0.2mm).

4. Sealing test:
After the hose is filled with about 9/10 of the water volume of the maximum capacity, cover the matching cover (if there is an inner plug, the inner plug needs to be equipped), put it in the vacuum dryer and vacuumize it to -0.06MPa and keep it for 5 minutes without leakage. ;
Put water according to the net content specified in the container, tighten the tube cap and place it flat at 40 °C for 24 hours without leakage;

06 Functional requirements for tubes
1. Compressive performance: you can refer to the following two methods
After the hose is filled with about 9/10 of the water volume of the maximum capacity, cover the matching cover (if there is an inner plug, the inner plug needs to be equipped), put it in the vacuum dryer and vacuum it up to -0.08MPa and keep it for 3 minutes without bursting or leakage.
10 samples are randomly chose from each batch of materials; the same weight or volume of water as the net content of each product is added to the sample tube, and it is placed horizontally; the tube body is statically pressed vertically for 1 minute with the specified pressure, and the pressure head area is ≥ 1/ 2 The force-bearing area of the container.

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