Plastic containers are widely used in people’s daily life. This is a type of product that can be produced and circulated in the market through simple production processes and assembly. Compared with other materials, plastic containers have their own advantages in many aspects, such as price, product life, shape, and so on. So is it safe to source plastic containers from China? This article will walk you through some basic information.
Production Process of Plastic Containers
We use all kinds of plastic containers in our daily life. In the kitchen, we will use the food crisper; in the living room coffee table, and dining table, we will use the tissue box; in the bathroom, we will use the soap dish; in the laundry room, we will use the laundry basket. It can be said that plastic products are found in every corner of our homes.
When producing plastic products, we choose the material and adjust the color, and mix the plastic particles and masterbatch particles together. The raw material is then transformed into a fixed shape using a suitable production process. There are different production processes for different plastics and products such as injection molding, blow molding, drop molding, blister molding, etc. The fittings are formed into plastic fittings according to the design of the mold. The different plastic parts are assembled together to become the finished product.
Types of Plastic Raw Materials
Plastics commonly used are not a single component, they are formulated from many materials. Among them, high molecular polymers (or synthetic resins) are the main components of plastics. In addition, in order to improve the performance of plastics, various auxiliary materials, such as fillers, plasticizers, lubricants, and stabilizers, should be added to the polymer compounds. , colorants, antistatic agents, etc., can become plastics with good performance. Our common plastic containers are produced from five general plastics, namely PE, PP, PVC, PS, and ABS.
Commonly used polyethylene can be divided into low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE). Among the three, HDPE has better thermal properties, electrical properties, and mechanical properties, while LDPE and LLDPE have better flexibility, impact properties, and film-forming properties. LDPE and LLDPE are mainly used in packaging films, agricultural films, plastic modification, etc., while HDPE is widely used in films, pipes, injection daily necessities, and other fields.
Relatively speaking, polypropylene has more varieties, complex uses, and many fields. The varieties mainly include homopolymer polypropylene (homopp), block copolymer polypropylene (copp), and random copolymer polypropylene (rapp). Homopolymer is mainly used in drawing, fiber, injection, BOPP film, and other fields, copolymer polypropylene is mainly used in household appliance injection parts, modified raw materials, daily injection products, pipes, etc., atactic polypropylene is mainly used in transparent products, high-performance products, high-performance pipes, etc.
Due to its low cost and self-flame retardant properties, it is widely used in the field of construction, especially for sewer pipes, plastic steel doors, windows, plates, artificial leather, etc.
As a transparent raw material, it is widely used when there is a need for transparency, such as in automobile lampshades, daily transparent parts, transparent cups, cans, etc.
ABS has the unique advantages of toughness, rigidity, and hardness, and has developed rapidly and is widely used. Its good mechanical properties can be used to make many mechanical parts. Such as gears, bearings, impellers, motor housings, instrument housings, etc.
Test for Plastic Containers
To ensure that plastic containers are usable, we must guarantee the safety of the product. Such product testing is essential. We have a dedicated introduction to testing related to food contact. Read the link. In addition, there are some products that need to be structurally tested. For example, for crisper products, we also need to check whether there is water leakage to ensure that the products are airtight. We usually require raw material suppliers to provide relevant certificates, so that the products we produce will also have corresponding test reports, and only products that pass the test will be exported and circulated in the market.