Cosmetic packaging testing items, inspection methods and testing instruments

Languang Electromechanical Shanghai Wang Weiwei021-62350561,13764018321

As a fashionable consumer goods, cosmetics not only need exquisite packaging, but also need to protect the products during transportation or shelf life. Jinan Languang Electromechanical Technology Co., Ltd. (), as an internationally renowned supplier of testing instruments and testing services, is now combining the testing and application requirements of cosmetic packaging to summarize the testing items and testing methods, with a view to the cosmetics manufacturers and Cosmetics packaging suppliers help in packaging inspection and quality control.

First, cosmetics transport packaging testing

Cosmetics must be transported, shelf display and other links to reach the hands of consumers, you need to have good transport packaging. At present, the transportation and packaging of cosmetics are mainly corrugated boxes, and the main test indicators are the compressive strength and stacking test of the carton.

1. Carton compressive strength test: This is introduced in the labthink blue light XYD-15K carton compression tester. During the test, the corrugated box was placed between the two pressure plates of the XYD-15K carton compression tester, and the compression speed was set. The pressure at the start of the test pressurization until the carton was crushed was the carton compressive strength, which was expressed by KN. When testing the compressive strength of the carton, be sure to set the preload value (generally 220N) according to the test standard and then test.
2, carton stacking test

The carton needs to be stacked in the process of storage and transportation. In the lowest layer, the carton must withstand the pressure of the upper carton. In order not to collapse, it must have suitable compressive strength after stacking, so stacking and maximum pressure are carried out. The double detection of the collapse is very important. Labthink's XYD-15K carton compression tester has built-in stacking test function and can directly give the stacking test results.

Second , cosmetic packaging printing quality inspection

Cosmetics have a good visual aesthetic and are beautifully printed. It is more important for the detection of printing quality. At present, the conventional items for the quality inspection of cosmetic printing are the abrasion resistance (scratch resistance) of the printing ink layer, the adhesion fastness detection, and the color discrimination.
1. Wear resistance test The MCJ-01A friction tester of labthink is introduced as an example. The sample was prepared according to the provisions of GB7706, and then placed on the test plane of the friction tester for fixing. 80 g of clean offset paper was placed on the load block. After setting the number of rubs, the test was started (generally 40 round trips), and the print quality was finally evaluated by the change in density before and after the test. Generally, more than 70% is used as a condition for conformity assessment.

2, ink adhesion fastness test

For plastic printing, it needs to be tested according to the provisions of GB7707 standard. Here, Labthink Languang BLJ-02 disc peeling test machine and YGJ-02 adhesive belt rolling machine are taken as examples. First, the glass tape paper is pasted on the ink printing surface. Then, roll back and forth three times on the YGJ-02 adhesive belt roll rolling machine, place it for 5 minutes, and clamp the sample on the A disk of the BLJ-02 disc peeling test machine. The outcrop tape is fixed on the B disk, and then turned on. The A disk was rotated at a speed of 0.8 m/s to uncover the glass tape paper, and the state in which the ink layer of the test sample was peeled off was observed to determine the bonding fastness of the printing ink layer.

3, color discrimination:

People usually observe color in daylight, so the fine color-resolving work in industrial production requires that the illumination source be a spectral power distribution with near-real daylight, that is, the D65 standard light source specified in the CIE. However, in the color matching process, there is a very special phenomenon: the sample and the sample will appear the same color under the first light source, and the color difference occurs under the other light source, that is, the so-called metamerism phenomenon, so the selection standard The light source box must have dual light sources. Here, Labthink's SGB-80 D65/A standard light source is taken as an example. The instrument is equipped with dual light sources of D64 and A light, which solves the problem of metamerism.

Third, cosmetics self-adhesive label testing <br> self-adhesive labels are widely used in cosmetic packaging, the testing items are mainly for self-adhesive labels (adhesive or pressure-sensitive adhesive) bonding performance test, the main detection The project has three indicators: initial adhesion performance, holding performance, and peel strength (peeling force).

1. Initial tack test: Taking the CZY-G initial tack tester as an example, the bevel ball method is used to make a short contact between the adhesive surface of the steel ball and the pressure sensitive adhesive tape with a slight pressure. The adhesion is used to test the initial tack of the sample, and the maximum steel ball number that can be adhered is used to characterize the initial tack properties of the adhesive.

2, sticky performance: Take CZY-6S holding viscous tester as an example, the test board with the adhesive sample attached vertically hanging on the upper and lower ends of the test rack to hang the weight of the specified weight, after a certain period of time after the sample adhesive The amount of displacement or the time the sample is completely detached to characterize the tackiness of the sticker.

3. Peel strength: Peel strength is an important indicator to measure the adhesive properties of self-adhesive labels. Take the XLW intelligent electronic tensile testing machine or the BLD-200S electronic peeling testing machine as an example. The self-adhesive label is cut into 25mm width by a sampling knife, and the self-adhesive label is rolled on the standard test board by a standard pressure roller. Then, the sample and the test plate are pre-stripped, and the test plate and the pre-stripped self-adhesive label are respectively placed in the upper and lower or left and right chucks of the test intelligent electronic tensile test or the electronic peel tester. Set the test speed to 300mm/min, start the test and test, and calculate the final peel strength KN/M.

Third, cosmetics packaging barrier performance testing

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

The unsaturated bonds in the cosmetic ingredients are easily rancid and deteriorated by oxidation. The loss of moisture tends to make the cosmetics dry and harden, and the maintenance of the aromatic odor in the cosmetics plays a vital role in the sales of cosmetics. Barrier performance testing includes testing of the permeability of oxygen, water vapor, and aromatic gases in cosmetic packaging.

1. Oxygen transmission rate detection, which is mainly for the detection of oxygen transmission rate of film, composite film and cosmetic packaging bags or bottle packaging used in cosmetic packaging. Take the PERME Bom-OX2/230 oxygen transmission rate test system of Labthink as an example. 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, and oxygen molecules diffuse through the film to the other side of the high-purity nitrogen. In the middle, the flowing nitrogen is carried to the sensor, and the oxygen permeation amount is calculated by analyzing the oxygen sink measured by the sensor. The detection principle for packaging bags or bottle packaging is similar.

2. Water vapor transmission rate detection is mainly used for the determination of water vapor transmission rate of cosmetic packaging film materials and packaging containers such as bottles, bags and cans. Through the measurement of water vapor transmission rate, technical indicators for controlling and adjusting packaging materials and other products are met to meet the different needs of product applications. In the PERME-W3/330 water vapor transmission rate test system, for example, the sample is clamped between the test chambers, a stable relative humidity of nitrogen flows on the side of the film, and dry nitrogen is on the other side of the film. Flow, due to the difference in humidity, water vapor will pass through the membrane from the high-humidity side to the low-humidity side, and the water vapor transmitted through the low-humidity side will be carried to the sensor by the flowing dry nitrogen gas, and the sensor will output an electric signal to calculate the water vapor permeation amount. For containers such as bottles and bags, dry nitrogen flows through the container, and the outside of the container is in a high-humidity state.

3, the fragrance performance test, this indicator is very important for cosmetics, once the fragrance of the cosmetics lost or changed will affect the sales of the product. Therefore, it is very important to test the fragrance retention performance of cosmetic packaging. Here, Labthink's PERME-OR2/410 organic gas permeability test system is used as an example. The sample is used to separate the permeation chamber under the specified temperature conditions. One side is the high concentration side of the aromatic gas, and the other side is the low concentration side, so that a certain aromatic gas concentration difference is formed on both sides of the sample, and the aromatic gas passes through the film to enter the low concentration side and is carried by the carrier gas flow. Entering the separation chamber, the FID hydrogen flame ionization detector completes the determination of the aromatic gas content in the carrier gas, and then calculates the amount of aromatic gas per unit area of ​​the sample per unit time.

Fourth, cosmetics packaging and packaging materials, other physical and mechanical indicators testing

The mechanical properties of cosmetic packaging play a very important role in the packaging, processing and transportation of cosmetics. The quality of the food directly determines the safety of the food in the circulation. Summary of all test items include: tensile strength and elongation, composite film peel strength, heat seal strength, sealing and leakage, impact resistance, material surface smoothing performance and other indicators

1. Tensile strength and elongation, peel strength, heat seal strength, tear performance

Tensile strength refers to the maximum stress value of the material before it is broken. The detection can effectively solve the damage and breakage of the package caused by the external force due to insufficient mechanical strength of the selected packaging material. Peel strength, also referred to as composite strength or composite fastness, is the adhesion between the layers in the composite film. If the adhesive strength is too low, it is extremely easy to cause problems such as leakage due to separation between layers during use of the package. Heat seal strength, also known as heat seal strength, is the strength of the seal. During the storage and transportation of the product, once the heat seal strength is too low, it may cause problems such as cracking of the heat seal and leakage of contents. To test the above indicators, it is necessary to test by means of a tensile testing machine. Here, Labthink Languang's XLW (PC) intelligent electronic tensile test is taken as an example. Sample preparation is carried out according to the test standards corresponding to different inspection items. The sample is placed in the upper and lower fixtures of the tensile testing machine, and the test speed is set to 300 mm/min (the tensile test can also be set to 500 mm/min), and the test results are calculated by the start test. The XLW (PC) intelligent electronic tensile testing machine uses a functional menu to complete standard tests by simply selecting different test items. In addition, for the detection of heat seal strength, the preparation of the sample is required by means of a "heat seal tester", which is also one of the commonly used equipments in the cosmetic packaging laboratory.

2, impact resistance testing,
The control of the impact resistance of the packaging material can prevent the occurrence of damage to the surface of the packaging due to insufficient toughness of the material, and effectively prevent the product from being damaged due to the impact resistance or poor drop performance of the packaging material in the circulation. Generally, it is necessary to use a dart impact tester for testing. Here, the BMC-B1 dart impact tester of labthink is introduced as an example. The dart impact tester determines the impact resistance of the plastic film by the free dart method. This is a quick and simple test that is used by most cosmetic packaging manufacturers and cosmetic manufacturers to test the energy required to tear a film sample under the specified free dart impact conditions. The energy of the package is broken when 50% of the film sample is damaged under specified conditions.

3, the coefficient of friction of the material The coefficient of friction of the material is the smooth performance of the surface of the material, is an important indicator to evaluate the smooth performance of the inside and outside of the material. It is tested to ensure that it has good opening properties or that it can be smoothly transported and packaged on a high-speed production line. The testing instruments are generally carried out according to GB10006 with a friction coefficient meter. Here, Labthink's MXD-02 friction coefficient meter is taken as an example.
1) Firstly, the sample is adjusted according to the standard, and the test surface of one sample is fixed upward and flat on the horizontal test bench. The length of the sample and the test bench should be parallel.

2) Place the test surface (63 mm × 63 mm) of the other specimen down, wrap the slider, and fix the specimen on the front and upper surfaces of the slider with tape.

3) The slider to which the sample is fixed is placed in the center of the first sample without impact, and the test directions of the two samples are parallel to the sliding direction and the force measuring system is just unstressed.

4) Start the instrument so that the two samples move relative to each other to test the dynamic and static friction coefficient.

V. Testing of the thickness of cosmetic packaging materials Whether the thickness of cosmetic packaging materials (film or sheet) is uniform is the basis for testing various properties of the film. The uneven thickness of the film not only affects the tensile strength and barrier properties of the film, but also affects the subsequent processing of the film. There are various methods for measuring the thickness, which are generally divided into non-contact type and contact type: non-contact type including ray, eddy current, ultrasonic, etc.; also known as mechanical thickness measurement in contact industry, which is divided into point contact type and surface Contact type. At present, laboratory testing of cosmetic film thickness uses mechanical surface contact testing, and this method is also used as a method of thickness arbitration. Take the labyink blue light CHY-C2 thickness gauge as an example, take the flat material on the test bench with thick test, set the time interval and the number of statistics, and start the instrument to perform automatic detection. The instrument test resolution It is 0.1 micron.

Sixth, cosmetic packaging sealing and leak detection
Sealing and leak detection of cosmetic packaging refers to the characteristics of the packaging bag to prevent other substances from entering or the contents from escaping. There are two methods for commonly used detection methods:
1. Water decompression method:

Taking Labthink's MFY-01 as an example, this seal tester is the equipment for decompression in water. The test procedure is as follows: put a proper amount of distilled water in the vacuum tank, put the sample into the vacuum tank and put it under the pressure plate. The package is completely immersed in water; then the vacuum pressure and time of the test are set, the test is started, the vacuum chamber is evacuated, the internal and external pressure difference is generated for the sample immersed in the water, and the gas escape condition in the sample is observed to determine the sample. Sealing performance;

2, positive pressure detection method

Take Labthink's LSSD-01 leak and seal strength tester as an example. The instrument is tested by positive pressure. By applying pressure to the inside of the package, the pressure resistance, sealing degree and leakage index of the flexible package are detected, thereby achieving the purpose of detecting the integrity and sealing strength.

Seven, cosmetic packaging headspace analysis:
Oxygen and water vapor are the main factors affecting the shelf life of most products. It has been found that by controlling the proportion of gas components in cosmetic packaging, the shelf life of the product can be effectively extended or the quality of preservation can be improved. When the filling is completed, a small amount of air remains in the package. In order to detect and analyze the oxygen or headspace analysis in the package, a headspace analyzer is required. Here, the labyink blue HGA-01 top air analyzer is used as an example. It can be used to seal the content of oxygen, carbon dioxide gas and mixing ratio in packaging bags, bottles, cans, etc.; it is suitable for fast and accurate gas component content and proportion in packaging materials in production lines, warehouses, laboratories, etc. Make an evaluation to guide production and ensure that the shelf life of the product is achieved.

Five, cosmetic bottle packaging testing equipment

Bottle packaging is a form of packaging that is currently used in the packaging field. The cap locking and opening torque value is one of the process parameters of the production unit offline or online key control. Whether the torque value is appropriate or not has a great influence on the intermediate transportation of the product and the final consumption. The detection of the opening and locking force of the cap needs to be detected by means of the NJY-20 torque meter.