Barrier properties, heavy metals, friction coefficient, tensile strength and elongation, appearance, heat resistance, cold resistance, pH value, total number of bacteria, total number of molds and yeasts, compatibility, peel strength, mild hot air, sealing and leakage, impact resistance, thickness, solvent residue, printing quality, etc.

1. cosmetics transport packaging testing

Cosmetics after transportation, shelf display and other links to reach the hands of consumers in good condition, it is necessary to have a good transport packaging. At present, the transportation and packaging of cosmetics are mainly corrugated boxes, and the main detection indicators are the compressive strength and stacking test of cartons.

1. Test of carton compressive strength: During the test, the corrugated carton is placed between the two pressure plates of the XYD-15K carton compressive testing machine, and the compression speed is set. The pressure when the test is started and the carton is crushed is the compressive strength of the carton, which is expressed by KN. When testing the compressive strength of cartons, we must pay attention to setting the preloading value (generally 220N) according to the testing standard.

2. Carton stacking test: Cartons need to be stacked during storage and transportation. Cartons at the lower level of zui have to bear the pressure of multiple cartons at the upper level. In order not to collapse, they must have appropriate compressive strength after stacking. It is very important to carry out two-item detection of stacking and zui large crushing force.

2. cosmetics packaging printing quality inspection

Cosmetics have good visual beauty and are beautifully printed, so it is important to detect the printing quality. At present, the regular items of cosmetic printing quality inspection are the abrasion resistance (scratch resistance) and adhesion fastness inspection and color identification of printing ink layer.

1. Wear resistance test: prepare the sample according to GB7706, then place it on the test plane of the friction tester for fixation, and take 80g of clean offset paper and install it on the load block. After setting the number of friction, the test is started (usually 40 rounds). zui finally evaluates the printing quality by the change of density before and after the test. Generally more than 70% as a condition of conformity assessment.

2. Inspection of ink adhesion fastness: For plastic printing, the inspection shall be carried out according to GB7707 standard. First, the glass tape paper shall be pasted on the ink printing surface, then the glass tape paper shall be rolled back and forth for 3 times on the YGJ-02 adhesive tape roller, and the sample shall be clamped on the plate of the BLJ-02 disc peeling tester for 5min. The exposed adhesive tape shall be fixed on the B plate, and the plate shall be turned on to uncover the glass tape shall be rotated at a speed of 0.8 m/s, the state in which the ink layer of the test sample was peeled was observed to determine the printed ink layer bonding fastness.

3. Color discrimination: People usually observe colors in sunlight. The fine color discrimination work in industrial production requires that the lighting source is a spectral power distribution similar to real sunlight, that is, the D65 standard light source specified in CIE. In the color matching process, there is a very special phenomenon: the sample and the sample will have the same color under the first light source, while the color difference will appear under another light source, which is the so-called metameism phenomenon. When selecting the standard light source box, it must have double light sources.

3. cosmetics adhesive label detection

Adhesive labels are widely used in cosmetic packaging. Their testing items are mainly aimed at testing the bonding performance of self-adhesive labels (self-adhesive or pressure-sensitive adhesive). The main testing items are: initial adhesion, holding adhesion, and peel strength (peel force).

1. Initial viscosity test: The inclined ball rolling method is used to test the initial viscosity of the sample by the adhesion of the adhesive tape to the steel ball when the steel ball and the adhesive surface of the pressure-sensitive adhesive tape sample are in short contact with a slight pressure, and the initial viscosity of the self-adhesive is characterized by the large zui steel ball number that can be adhered.

2. Adhesion holding performance: The test plate with adhesive sample is vertically hung on the upper and lower ends of the test frame to hang a weight of specified weight, and the adhesion holding performance of the self-adhesive label is characterized by the displacement of the adhesive sample or the time when the sample is completely detached after a certain period of time.

3. Peel strength: Peel strength is an important index to measure the adhesive performance of adhesive labels. The adhesive label is cut into a width of 25mm with a sampling knife, the adhesive label is rolled on the standard test plate with a standard pressure roller, then the sample and the test plate are pre-peeled, and the test plate and the pre-peeled adhesive label are respectively placed in the upper and lower or left and right chucks of the intelligent electronic tensile test or electronic peeling test machine. Set the test speed of 300 mm/min, start the test to test, and count the peel strength KN/M of zui.

Detection of barrier properties of 4. cosmetics packaging

The barrier property of packaging is one of the important testing items of cosmetic packaging. Barrier property refers to the barrier effect of packaging materials on gas, liquid and other permeants, and barrier property is an important factor affecting the quality of products during shelf life.

The unsaturated bond in cosmetic ingredients is easy to cause rancidity and deterioration due to oxidation, the loss of water is easy to make cosmetics dry and hardened, and the maintenance of aromatic odor in cosmetics also plays a vital role in the sale of cosmetics. The barrier performance test includes the test of the permeability of oxygen, water vapor and aromatic gas in cosmetic packaging.

1, oxygen transmission rate detection, the index is mainly for the film used in cosmetic packaging, composite film and cosmetic packaging bags or bottles of overall packaging oxygen transmission rate detection. The pre-treated sample is clamped between the test chambers, oxygen or air flows on one side of the film, high-purity nitrogen flows on the other side of the film, oxygen molecules diffuse through the film to the high-purity nitrogen on the other side, are carried to the sensor by the flowing nitrogen, and the oxygen permeability is calculated by analyzing the oxygen temperature measured by the sensor. The detection principle for packaging bags or bottles is similar.

2, water vapor transmission rate detection, mainly used for cosmetic packaging film materials and bottles, bags, cans and other packaging containers of water vapor transmission rate determination. Through the determination of water vapor transmission rate, to control and adjust the technical indicators of packaging materials and other products to meet the different needs of product applications. Clamp the sample between the test chambers. Nitrogen with a stable relative humidity flows on one side of the film and dry nitrogen flows on the other side of the film. Due to the humidity difference, water vapor will pass through the film from the high humidity side into the low humidity side. The water vapor transmitted on the low humidity side is carried to the sensor by the flowing dry nitrogen. The sensor outputs an electrical signal to calculate the transmission amount of water vapor. In the case of containers such as packaging bottles and bags, the dry nitrogen gas flows inside the container, and the outside of the container is in a high humidity state.

3, fragrance performance testing, the index is very important for cosmetics, once the fragrance of cosmetics lost or changed will affect the sales of products. It is very important to detect the fragrance retention performance of cosmetic packaging. Under the specified temperature conditions, the permeation cavity is separated by the sample, one side is the high concentration side of aromatic gas, and the other side is the low concentration side. In this way, a certain concentration difference of aromatic gas is formed on both sides of the sample. The aromatic gas will pass through the film into the low concentration side and be carried by the carrier gas flow into the separation chamber, the content of aromatic gas in the carrier gas is determined by FID hydrogen flame ionization detector, and the amount of aromatic gas passing through the sample per unit area per unit time is calculated.