A kind of production technology of polypropylene product and its application

Abstract

The invention discloses a production process and applications of a polypropylene product. The production process comprises: preparing a mold matched to the shape of a product, and filling the moldingcavity of the mold with an aged polypropylene material, wherein the mold comprises a solid mold and a moving mold, and the moving mold is controllably matched with the solid mold through a driving mechanism. According to the production process, when the molding cavity of the mold is filled with polypropylene and molding is performed, mold pre-heating, material entering, material returning, secondary mold pre-heating, cross cutting of the solid mold, heating molding, product shaping, water cooling, vacuumizing and demolding are sequentially performed; the moving mold mirror surface treatment process is set after the cross cutting of the solid mold; and the moving is subjected to steam heating to achieve the temperature of 180-200 DEG C, the mold is tightly pressed, and the moving mold bearsthe pressure of 10-13 kg / cm<2> after the steam is introduced. According to the present invention, through high-temperature molding and mirror surface treatment, the combination gap between the polypropylene particles and the particles are completely closed so as to improve the quality of the product.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to a production process and application of polypropylene products. Background technique [0002] In the prior art, EPP (Expandable Polypropylen, expandable polypropylene) is a new high-performance compression-resistant cushioning and thermal insulation material with excellent physical properties, stable chemical properties, and easy recycling and disposal. EPP product molding is roughly divided into two categories. One is to directly produce packaging products by using a packaging forming machine and equipped with corresponding molds, which are widely used in shock-absorbing packaging of electrical appliances and light industrial products, fresh-keeping transportation of fruits and seafood, and casting And other fields, can also be used to make toys. The other is to use a sheet forming machine to produce large-volume rectangular foam products, which are cut into sheets and used as co...

AI Technical Summary

Problems solved by technology

[0003] At present, it is found that the existing products such as food takeaway boxes and cold chain turnover boxes have poor overall hardness and are easy to scratch, and due to the large distance between the particles that make up the product, the waterproof effect and thermal insulation effect are poor. Therefore, a new molding process is needed. To solve the above problems, and be able to extend this process to other products