Application of the hottest HDPE hollow blow moldin

2022-10-16
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Application of HDPE hollow blow molding technology in the dairy industry

with the improvement of people's living standards, dairy products are popular for their rich nutritional value and health care functions. As an integral part of dairy products, dairy packaging affects the development of dairy industry

using HDPE blow molded hollow containers to pack liquid milk has the characteristics of convenient carrying, light weight and low cost. Moreover, HDPE bottles have many advantages, such as good impact resistance, shatterproof, leak proof, repeatable opening and closing of the cover, recyclability and so on, so they have developed rapidly in the field of dairy products

in the past 25 years, the dairy packaging in Mexico, Canada, Britain, Australia and South Africa has changed from paper and glass products to plastic packaging. In the United States, the vast majority of HDPE liquid milk packages with a capacity of 0.5 to 1 gallon are processed using a bottle blowing system

processing advantages improve productivity

compared with ordinary shuttle machine (reciprocating equipment), uniloy Milacron's recip series bottle blowing machine has low production cost, high mold cavity number and short production cycle. For example, if the circulation time of HDPE bottle with blowing volume less than 1L is controlled within 5s~6s, the output of the whole equipment can be greatly improved. The capacity of the equipment is shown in the table below

working principle

the working principle of this system is that the screw rotates continuously during the plasticization process. When the system needs blank after a cycle, the screw blank injection technology is used to replace the traditional die core sitting technology in the extrusion head. At the same time, the equipment also adopts a simple and unique mode locking structure and a full closed-loop computer control system

scope of application

in addition to high-density polyethylene (HDPE), the raw materials for this equipment include low-density polyethylene (LDPE), polypropylene (PP) and polyvinyl chloride (PVC). The products produced can be used in the packaging of liquid milk, flavored milk, soymilk, liquid fermented milk, fruit juice, water drinks and tea drinks

n2n production mode

recip series reciprocating equipment can support the simultaneous extrusion of two preforms on one die in a neck to neck manner, thereby doubling the output and improving production efficiency. In this way, users can get double product output without increasing the equipment model. This production method is applicable to packaging bottles without handles. The volume is between 50ml~1000ml, and the agreement of staggering peak production is consciously fulfilled. The plastic bottles produced are sterile products, which can be directly filled. The position of the bottle mouth can be placed in the center of the bottle top or in the upper corner according to the different needs of users

at the same time, this series of bottle blowing machines can provide a complete set of production systems or some equipment according to the different requirements of users. The complete set of systems includes bottle blowing equipment, molds, trimming system, crushing system, cooling, and transmission system

broad market prospects

after polyurethane was invented by the German company of covestro (formerly Bayer materials technology) in 1937,

in the face of increasingly fierce market competition, many dairy enterprises have higher and higher requirements for dairy packaging. For example, many dairy products rich in vitamins in the market require a UV isolation layer in the packaging bottle wall to keep their nutrients from being damaged by light, sunlight and so on, In particular, UV light and oxygen are shielded. In Europe, taking France as an example, since 1990, UHT milk products have been packaged with multi-layer co extruded HDPE, and the market share of products has been growing. Multi layer HDPE plastic bottles have occupied nearly 70% of the milk product packaging market. Recip reciprocating series is also meeting the needs of the market and will soon achieve three-tier co extrusion

at present, the output of many domestic customers cannot reach the maximum energy limit of the recip reciprocating series equipment, which causes a waste of resources and limits the space for the development of the equipment in China. In China, the emissions of CO2 and SO2 can be reduced by more than 64 million tons. Uniloy Milacron has begun to produce and launch small equipment to meet the production needs of domestic small and medium-sized customers, and gradually develop the production technology of PET materials

source: Dairy China

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