Identify the injection molding material, the simple physical identification method will be done!

　　As a PVC Plastic Tube Core Manufacturer, share with you how to identify injection molding.

　　Appearance method:

　　Appearance identification mainly observes the appearance characteristics of plastic products through visual, tactile, olfactory, etc., such as product shape, transparency, color, gloss, hardness and the like.

　　After the plastic is recycled and reprocessed, the color, gloss, strength, etc. will change. The color of the non-returned material will generally be more transparent. The product mixed with the recycled material will reduce the transparency; the gloss of the returned material is relatively poor; the experienced old injection molding Personnel can use the bite of the teeth to initially determine the strength of the plastic, and the added material is relatively brittle. The appearance method is generally used as a preliminary identification of plastic return materials.
                                                                                             
                                                                                                                           PVC Packing Plastic Tube Core

　　Physical property test method:

　　Different kinds of plastics usually have a large difference in density, and the difference in density between the same plastic before and after re-recycling will be quite different.

　　The density method can be used for the rough identification of plastic return materials, but it cannot be used to completely judge the plastic return material, because many defects or other defects will occur during the plastic recycling process. For example, the regeneration process of ABS/PC produces many tiny holes, and the number of holes increases as the number of regenerations increases. Our company's products are ABS Plastic Tube Core For Film.

　　For impact strength, tensile strength, compressive strength, flexural strength and other strength properties, there will be a significant decrease with the increase of the plastic return material content, especially the tensile strength and bending strength will be significantly reduced.

　　These reductions in strength properties are closely related to the formation of voids and defects in the recycling process, and the reduction in molecular weight. Therefore, for the identification of plastic return materials, these strength properties of the plastic can be tested, and the comparison can be used to initially determine whether the product contains the return material.

　　Dissolution method:

　　By using the solubility of plastic in different organic solvents, different plastics can be identified, and plastics can be identified. Due to the high recovery of recycled materials, it is difficult to achieve high purity, and some impurities will exist, resulting in no solubility of the recycled materials. The raw materials are good, and the plastic returning material will have a residue in the process of dissolving the organic solvent.

　　Commonly used plastic dissolved organic solvents are benzene, xylene, tetrahydrofuran, diethyl ether, acetone and formic acid. However, the dissolution method has a very large limitation. Many plastic products are filled with various fillers during processing, which affects the comparison between the recycled material and the original material.

　　Therefore, the dissolution method has a large error in the identification of the return material, but it is a relatively quick method for identifying the type of plastic return material.

　　Our company PVC Packing Plastic Tube Core is on sale, if you are interested, welcome everyone to consult.