The perfect molding production of PET plastic bottle embryo
Due to rising global demand for PET plastic bottles, used in the manufacture of PET plastic bottle preform is also become the focus of attention. In order to ensure the perfect molding of PET bottle embryo, many problems need to pay attention to, and from the temperature to the raw materials, each link needs to be strictly controlled. PET is a hygroscopic material. If the water content is too high, the hydrolysis will occur under high temperature treatment, and PET molecular chain will break and thermal decomposition to produce acetaldehyde. Physical and mechanical performance and reduce the rate of crystallization. Speed up, when injection bottle embryo, embryo bottle to become part of the crystal and white, it will affect the quality of the products. In advance before the injection, PET pellet drying to the moisture content must be 0. 06% or less, it can produce good non-crystalline transparent bottle embryo. After embryo bottle mold dryer desiccant, the use of high temperature air to dry the PET particle circulation in the hopper. For dry air, dew point temperature must be in - 30 ° C to - Between 40 ° C. To set the temperature between 180 ℃ to 185 ℃, and dry for 240 minutes. In the first step, the first to advance to von berg systeme of injection molding production, which is by placing the melting glue injection mold cavity, and then advance von berg systeme rapid cooling below the temperature of crystallization temperature and form, thus forming a transparent von berg systeme. The second step is to preforming embryo heated to a temperature higher than the temperature of glass transition point, and then extends, to blow molding and cooling molding. Processing methods: divided into one stage and two stages. A stage is done in the same machine injection and blow molding, and then will be preformed preforming embryo cooled to below the temperature of crystallization temperature, but still keep the thermoelastic state, the final blow in the bottle. Two-phase type by injection molding machine and blow molding machines the two machines. First of all, made the unit-cells by injection molding machine, will advance as cooling solidification temperature, remove and cool to room temperature. Bottle blowing, she sent them to the blow molding machines to heat the preforming embryo to blow molding temperature, then blow molding. Cold forming. PET bottle embryo molding injection molding process conditions in addition to the extrusion molding process, most are made of injection molded bottle embryo.
Cosmetic tube field, where is the foothold in the future?
Nowadays, in order to meet the changing needs of consumers, whether it is basic skin care brands or efficacy brands, when most of them launch new series of products, they will launch matching products with instruments, aiming to realize the effective incorporation of brands through high-tech instruments.
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).
How do small and medium-sized enterprises develop product of cosmetics.
1. Don’t make too many products. There are more and more small and medium-sized cosmetic manufacturers. Their products almost cover all kinds of cosmetics. You can see that there are many products, but in fact, they have many disadvantages. The first one is that the sales volume is not necessarily high. The 80/20 law states that 80% of the benefits of any entity come from 20% of the products, that is, 80% of the products can only contribute 20% of the benefits, which is not economic. The second one is that too many product lines are relatively backward in management, and their own strength is insufficient, enterprises can’t grasp the dynamics of consumers' hearts, so there are a lot of products which are not need by consumers. Third, most companies focus on speculation and bargain hunting. Too many product lines limit the development of an enterprise. It is difficult for consumers to form an understanding of the enterprise without a major product. And it is impossible to find the market position without the c
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!