Hose pipe in the choice of

        

      First of all, the materials used to meet relevant health standards, heavy metals, fluorescent agents harmful substances should be controlled within the limits prescribed. For example, exports to the United States, plastic hoses, the use of polyethylene (PE), polypropylene (PP) to reach the United States Food and Drug Administration (FDA) standard 21CFR117.1520.

Second, the barrier property of materials. If the Japanese enterprise package contents are particularly sensitive to oxygen (for example, a number of whitening cosmetics) or very likely to be volatile flavor (such as essential oils or some fat, acid, salt and other corrosive chemicals) products, at this time five-layer co-extruded tubes should be used. Because the five-layer co-extruded tube (polyethylene / adhesive resin / EVOH / adhesive resin / polyethylene) and oxygen transmission rate is 0.2 to 1.2 units, while the average single-layer polyethylene pipe of oxygen through the rate is 150 ~ 300 units. In a certain period of time, dressed weight loss rate of ethanol co-extruded tubes test several times lower than the single-layer tubes. In addition, EVOH is an ethylene - vinyl alcohol copolymer, has excellent barrier properties, Paul fragrance (15 to 20 microns thickness effect of the most ideal).

Third, the material stiffness. Japan-based business-to-plastic hose stiffness requirements vary, so how to obtain the desired stiffness it? Commonly used in the plastic tube of polyethylene to low density polyethylene, high density polyethylene, linear low density polyethylene-based. Including high-density polyethylene stiffness better than the low-density polyethylene, so by adjusting the high-density polyethylene / low-density polyethylene ratio can achieve the desired stiffness.

Fourth, the materials, chemical resistance. Low-density polyethylene high-density polyethylene have a better chemical resistance.

Fifth, the materials weather resistance. Plastic hose to control the short-term or long-term performance, need to be considered: the appearance of pressure / drop performance, seal strength, resistance to environmental stress cracking (ESCR value), fragrance, and loss of active ingredients and other factors.