Blog

Cracking is one of the most common problems in plastic products, the main factor being due to stress deformation. There are residual stresses, external stresses, and stress deformations caused by the external environment. (-) crack caused by residual stress Residual stress is mainly caused by the following three conditions, namely, overfilling, demolding, and metal inserts. If the filling is excessive and the plastic product is cracked, it can be solved from these directions: (1) Since the pressure loss of the […]

Many families buy some toys at different ages, which means that the previous toys are abandoned. However, as children grew older, they lost interest in the old plastic dolls. This caused many families to pile up a lot of old plastic dolls. The problem of parents’ headaches is how to deal with the old plastic dolls. It’s a pity to throw them, not to throw them. Also occupy the place. We can clean up the old toys that are outdated. […]

First, in the selection of materials to consider: 1. Physical and mechanical properties of plastics such as strength, rigidity, toughness, elasticity, water absorption and sensitivity to stress; 2, plastic molding process, such as fluidity, crystallization rate, sensitivity to molding temperature, pressure, etc.; 3. The shrinkage of plastic products after molding and the difference in shrinkage ratios. Second, in the shape of the product: can meet the requirements of use, is conducive to filling, exhausting, feeding, and can be adapted to […]

Today, I will introduce you to the identification of plastic toys: How to identify non-toxic plastic glue? First, Put the plastic bag on the bottom of the water. Because of the different specific gravity, polyethylene and polypropylene float on the surface of the water and are non-toxic. Polyvinyl chloride and polystyrene sink to the bottom and are poisonous. Second, from the appearance of polyethylene, polypropylene is relatively soft, basically transparent, but polyethylene milky white, polypropylene white; and PVC plastic bags […]

To facilitate the recycling of plastics, the Society of the Plastics Industry, Inc. (USA) proposes a labeling system that uses plastic types to classify: “Resin Identification Code” (often translated as “plastic” Material code” or “plastic code”). Recyclable plastic containers are accompanied by a triangular label surrounded by three arrows, which indicate the type of plastic. Decomposable plastic Knives, forks and spoons made from degradable starch plastic. Main article: Biodegradable plastic Decomposable plastic can decompose in the sun. Starch is also […]

The color matching of plastics is the key to the coloring of plastics. Only with good color can we make a good product. In the color matching process, first of all, to determine the application requirements of the product, and according to the coloring properties of the plastic material, select the appropriate colorant. When selecting the color, the technician should strictly check the color, tinting strength, dispersibility, performance, processing balance stability, mixing and cost of the available pigments, and then […]

In the production of plastic toys, the identification method of plastics is usually identified by appearance and use, density test, softening point or melting point, burning test, and comprehensive identification method. The following commonly used methods are used for learning: Appearance and use To dissect an unknown polymer sample, the first thing is to look at the hand touch, to determine which category it belongs to in its appearance. If possible, understand its source and know as much as possible […]

To facilitate the recycling of plastics, the Society of the Plastics Industry, Inc. (USA) proposes a labeling system that uses plastic types to classify: “Resin Identification Code” (often translated as “plastic” Material code” or “plastic code”). Recyclable plastic containers are accompanied by a triangular label surrounded by three arrows, which indicate the type of plastic. Decomposable plastic Knives, forks and spoons made from degradable starch plastic. Main article: Biodegradable plastic Decomposable plastic can decompose in the sun. Starch is also […]

In daily life, we are all inseparable from plastic products and plastic craft toys, which are inseparable from our sight. Therefore, toys bring us a lot. Today, we introduce the difference between plastic and plastic. Plastic definition: It is mainly composed of carbon, oxygen, hydrogen and nitrogen and other organic or inorganic elements. The finished product is solid and is a molten liquid in the manufacturing process. Therefore, it can be melted by machine heating, pressurized to flow, and cooled […]

1. The plastic material is thermally expanded, and the coefficient of linear expansion is much larger than that of metal; 2. The rigidity of general plastic materials is an order of magnitude lower than that of metals; 3. The mechanical properties of plastic raw materials will decrease significantly under long-term heating; 4. The general plastic material will be permanently deformed under normal temperature and under the stress of its yield strength, and permanent deformation will occur; 5. Plastic materials are […]