For cosmetics, the aesthetic appearance of the packagin […]
For cosmetics, the aesthetic appearance of the packaging can directly affect the consumer's recognition of the brand and product quality. It is generally believed that first-class cosmetics should be equipped with first-class packaging commensurate with it, so each cosmetic brand is on its product packaging. The investment is very large, and in addition to ensuring the quality of the product, it pays particular attention to the aesthetic appearance of the appearance and the convenience of use. From the consumer's point of view, the printing, opening properties of the packaging, the surface feel of the packaging material, the printing effect, and the exterior design have all become important considerations for selecting the product. However, in addition to the exterior design, these factors are closely related to the performance testing of packaging materials.
1 Printing quality Cosmetics have a good visual aesthetic and are beautifully printed. It is important to check the printing quality. At present, the conventional items for the quality inspection of cosmetic packaging printing are the abrasion resistance (scratch resistance) of the printing ink layer, the adhesion fastness detection of the ink, and the color discrimination. Among them, ink adhesion fastness detection and color discrimination have clear detection methods, but it is necessary to pay attention to the wear resistance test. At present, the standard test method requires the load block to adopt linear motion, but the international standard requires the load block to adopt curve motion. In the form of ASTM D5264 (Labthink PARAMTM RT-01 Friction Tester), the tester should synthesize the exit test to determine the test method used.
2 Self-adhesive label testing Self-adhesive labels are widely used in cosmetic packaging. The testing items are mainly for the adhesive performance test of self-adhesive labels (stickers or pressure-sensitive adhesives). The main testing items have initial adhesive properties. Adhesive properties, peel strength (peeling force) three indicators. Initial tack test, using the bevel ball method, the initial tack of the test specimen is tested by the adhesion of the adhesive tape to the steel ball when the steel ball and the pressure sensitive adhesive tape are briefly contacted by a slight pressure. The largest steel ball number that is stuck to characterize the initial tack properties of the sticker. For the adhesion test, the test plate with the adhesive tape sample is suspended vertically on the test frame, the weight of the specified weight is suspended at the lower end, and the displacement of the sample adhesive or the time when the sample is completely detached after a certain time is used. To characterize the adhesive properties of self-adhesive labels. The peel strength is an important indicator to measure the adhesive properties of the self-adhesive label. Usually, the test can be carried out by an electronic tensile tester or an electronic peel tester.
3 Easy opening bottle packaging is a form of packaging that is used more in the field of cosmetic packaging. The size of the cap lock and the 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 can be detected by means of a torque meter, and the opening and locking force detection of the cap should also be related to the sealing test of the package. Packaging bags are also widely used in the field of cosmetics, especially for small-capacity packaging. The easy opening is mainly determined by the tearing properties of the packaging materials, heat-sealing properties and the friction coefficient of the surface of the material. It should be noted that the clamping force provided to the material during the tear test is large enough so that there is no "slip" of the material during the test, but if the consumer actually opens the package, if the material surface The frictional force is not well matched with the tearing force of the material, and it is often the case that the opening slip phenomenon occurs in the case where the grip strength is not large enough, which in turn causes difficulty in opening. In the design of the package, it is necessary to comprehensively consider the two indicators of the packaging material and perform simulation tests under various grip conditions.