Pet plastic bottle production in the analysis of the causes of bubbles and vacuum bubble
Melt pet plastic bottles in the process of mold filling by gas interference, often form some hole or air bubbles on the surface of products. Now a summary about a bubble. Technological factors: 1, the speed is too fast, make the molten plastic decomposition by big shearing action, produce gas. 2, product cooling fast, uneven contraction, especially the products for the larger wall thickness, the surface cooling speed is faster than near the center, in the process of cooling, near the center of plastic shrink and expansion to the appearance, the center filling, vacuum bubble. 3, pressure and pressure is insufficient, make molten material and cavity surface is not close to, is not conducive to air discharge. 4, back pressure, back pressure control of the speed of the screw back, back pressure is small, the speed of the screw back will be quick, easy to produce feed shortage, material into the air, not from the inlet discharge, produce a large number of bubbles. Raw materials have water material factors. Die mold factors trapped gas, should maintain the mold or increase the exhaust slot.
2018 Shanghai big Hongqiao fair, Guangzhou LISSON Plastic Co., Ltd. and you will be there
2018 the fair will again be strong in the Shanghai National Convention and Exhibition Center on 5.19-21 day, and Guangzhou LISSON Plastic Co., Ltd. will come to the same time. We will meet the exhibition with such products as non vibratory eye cream import instrument, double roller unique design hose and so on, and then lift the storm event of the whole industry chain!
Guangzhou LISSON is a professional tube manufacturer specializing in the development, production and sale of tube
Innovation is the spirit. We have been pursuing the raise of the user experience, Lisson offfers cosmetic tube with applicator which has massage funtion, it can lift and whiten skin tone and keep skin clean, welcome to reach us for details.
What is the two in one tube and how to fill it in the rear? And the application of the product in skin care
Unlike a single branch tube, the most intuitive tube is a tube in the tube, which looks like a single branch, but can fill two kinds of material at the same time, at the same time extruding. When the material is not used, the material body is separated, and when used, mingling and merging.
What are the customers' concerns about cosmetic packaging enterprises
In the choice of cosmetics package enterprises, first of all to see whether the qualification of the enterprise is in line with the requirements of the national cosmetic package production. If the enterprise's qualification is blurred, it shows that the enterprise does not meet the national production requirements and the quality of the product can not be guaranteed. So when choosing cosmetic packaging enterprises, we must check the production qualification of enterprises.
What standard should cosmetic tube have in respect of oxygen resistance
Cosmetic tube as a container of cosmetics, do not react with the products is the most important function of tube, cosmetic ingredients are easy to cause the reproduction and growth of bacteria, in addition to its own factors, there is a part of the influencing factors because of the impact of oxygen and water; It can be seen that, the most important factor of cosmetic deterioration is oxygen, all cosmetic tube needs to have very good oxygen resistance and gas resistance (prevent the fragrance molecules in the cosmetics and the effective molecules of cosmetics overflow).