Advantages and weaknesses of pulp molding products

Four, the advantages and weaknesses of pulp molding products

Advantages of Pulp Molded products Pulp molded parts have a number of significant advantages over EPS buffer parts:

The raw materials of pulp molding packaging products are waste paper and various fiber materials, which are widely sourced and easy to collect, and will not cause obstacles to the environment and recycling, which is conducive to the export of products. As foamed plastics come from petroleum products, resource depletion and price problems will become more and more serious.

(2) Pulp molded packaging products have a wide range of applications, and the products that use foam as lining can basically be replaced by pulp molded products. Pulp molding products can be stacked for storage, which accounts for 1/2 ~ 2/5 less storage space than foamed plastics, and the freight and storage costs are smaller.

③ Paper products have good anti-static property, foam plastic friction is easy to produce static electricity, which has a better protective effect on electronic products and home appliances.

When packaging plastic products, food moisture is not volatile, easy to mold and rot, and paper products have permeable gas performance, so as to achieve anti-corrosion effect.

2. The weakness of pulp molding products:

① The production process of pulp molding products itself is weak. The production quality of pulp molding products is easily affected by various production factors, such as: if the quality of raw materials is unstable, the shrinkage ratio of products after drying is not consistent with the original design process, and the improper ratio of beater slurry will cause high product breakage rate; The same set of molds are produced on different types of molding machines, and there are certain differences between the products, which leads to the increase of scrap rate during the molding process; If the surface of the hot pressing molding mold is not smooth, there are more sand holes, or when the molding mold is installed, the upper and lower molds are not parallel, the friction phenomenon is serious during the molding, and it is easy to wipe the product. The humidity of the formed wet product is not well controlled during drying, resulting in high scrap rate. If the deformation of the dried product is too large, the overall quality will be affected. If a large number of products after drying do not run in time, long-term air drying leads to low moisture content of the product, excessive shrinkage, and high scrap rate when finishing.

② Raw materials are still relatively single, and it is urgent to develop new sources of raw materials. Pulp molding products need to consume a lot of natural forest resources, which is not conducive to ecological balance.

(3) The production equipment of pulp molding products is not advanced and automated enough. The advanced nature of pulp molding equipment is relatively backward compared with the foam plastic production equipment, such as the automatic molding machine of pulp molding, whether it is the production efficiency or the stability of the equipment is not as good as the foam plastic production equipment, and the degree of automation between the various process equipment on the whole production line is low. The artificial dependence of the production line on transportation, operation, scheduling and monitoring is still relatively serious.

④ The cost performance ratio of pulp molding products is high. Compared with foamed plastic products, the cost of paper molding products is high, mainly because of: high raw material cost, high cost of chemical additives, low degree of automation. In order to achieve the purpose of waterproof and oil proof, paper mold packaging products also need to be coated with plastic or add various additives, which will inevitably increase the difficulty of recycling and increase the cost, and also affect its inherent degradation performance.

⑤ The structural strength and buffering properties of pulp molded products are poor.