A. Hygiene of cosmetic plastic hose materials
First of all, the materials used must meet relevant sanitary standards, and harmful substances such as heavy metals and fluorescent agents should be controlled within the specified range. For example, for hoses exported to the United States, the polyethylene (PE) and polypropylene (PP) used must meet the US Food and Drug Administration (FDA) standard 21CFR117.1520.
B. Barrier properties of cosmetic plastic hose materials
If the contents of the daily chemical company’s packaging are products that are particularly sensitive to oxygen (such as some whitening cosmetics) or whose fragrance is very easy to volatilize (such as essential oils or some fats, acids, salts and other corrosive chemicals), then Five-layer co-extruded pipe should be used. Because the oxygen transmission rate of the five-layer co-extruded pipe (polyethylene/adhesive resin/EVOH/adhesive resin/polyethylene) is 0.2 to 1.2 units.
The oxygen transmission rate of ordinary polyethylene single-layer pipes is 150 to 300 units. In a certain period of time, the weight loss rate test of the co-extruded tube containing ethanol is dozens of times lower than that of the single-layer tube. In addition, EVOH is an ethylene-vinyl alcohol copolymer with excellent barrier properties and fragrance retention (the effect is ideal when the thickness is 15-20 microns). Double-layer pipe: adopts high-density HDPE and LDPE low-density PE materials. The pipe drawing method matched with the ratio of, the high-speed rotation method can achieve the effect of mixing uniformly. This method can appropriately adjust the softness and hardness of the hose. Compared with the single-layer pipe, the pipe body is thicker and has better resistance. Corrosive barrier properties and lower oxygen transmission rate are adopted by the majority of cosmetics manufacturers.
C. Stiffness of cosmetic plastic hose material
Daily chemical companies have different requirements for hose stiffness, so how to obtain the desired stiffness? The polyethylene commonly used in hoses is mainly low-density polyethylene, high-density polyethylene, and linear low-density polyethylene. Among them, the stiffness of high-density polyethylene is better than that of low-density polyethylene, so the desired stiffness can be achieved by adjusting the ratio of high-density polyethylene/low-density polyethylene.
D. Chemical resistance of cosmetic plastic hose materials
High density polyethylene lower density polyethylene has better chemical resistance.
E. Weather resistance of cosmetic plastic hose materials
To control the short-term or long-term performance of the hose, it is necessary to consider factors such as appearance, pressure/drop performance, sealing strength, environmental stress crack resistance (ESCR value), fragrance and active ingredient loss.
Post time:Dec-11-2021