Manufacturing technology and properties of the hot

2022-09-23
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Production process and performance of plant fiber foaming packaging products

plant fiber foaming packaging products and its molding technology is a new packaging product material made of plant fibers (waste newspapers, carton paper, other plant fiber materials, etc.) and starch additive materials. It has the advantages of no pollution to the environment, simple production process, low cost, wide source of raw materials The shock proof and isolation performance is better than that of pulp molded products

this material can not only be used for shockproof, but also replace EPS J as a filling particle object. Its effect is basically equivalent to that of EPS products, but this product is still under research and development. The research on the manufacture and mechanism of foaming plant fiber cushioning packaging materials at home and abroad has achieved phased results to varying degrees. The samples made in the laboratory are enough to show that the development of this product has great market potential

I. performance characteristics of plant fiber foaming products:

(1) the main raw materials of plant fiber foaming packaging products are waste paper, bagasse, wheat straw, straw and other fiber materials, as well as industrial starch, which will not cause obstacles to the environment and recycling, and is conducive to the export of manufacturers' products

(2) plant fiber foaming packaging products are suitable for Jinan experimental machine factory. You are welcome to use a wide range of products. With the progress of plant fiber foaming technology, this product can be used to replace the EPS foam lining and filling packaging currently used

(3) low comprehensive cost. Compared with pulp molding products, plant fiber foaming products have simple process, no need of complex shape forming mold and hot pressing mold, short production time and cycle, low energy consumption and raw material cost

(4) the anti-static and anti-corrosion performance is better than that of EPS firing materials, and the shock resistance and isolation performance is better than that of pulp plastic film products. The cushioning performance of products is basically the same, without the need for paper film products to form a mechanical structure through complex geometric shapes to increase the cushioning performance

(5) in force value detection, shock absorption and shock resistance are better than pulp molding products. The document is jointly issued by Henan Provincial Department of industry and information technology, the development and Reform Commission, the Department of science and technology, the Department of Finance and other four departments, and various auxiliary additives such as reinforcing agent, softener, waterproof agent, oil proof agent, flame retardant can be added according to the requirements of different packaged products to achieve a variety of functions

(6) it can be used to make packaging liners and fillers for large household appliances and electronic products, which can fill the gap that pulp molding products have not been able to make such packaging products so far

II. Manufacturing process and equipment characteristics:

compared with foaming plastics, plant fiber foaming materials have a relatively simple production process without multiple foaming and cooling processes. There are two main foaming processes for plant fiber foaming products: the use of chemical foaming agents and regional chemical foaming agents

(1) plant fiber foaming products without foaming agent are old book waste; Paper or other fibers and starch are used as raw materials. The foaming products do not need the foaming agent of the chemical plant, but are foamed by the action of steam. The production purpose of the products will not damage the environment. The used products can be treated like ordinary garbage, and can also be recycled and reprocessed. In terms of economic benefits, fiber foamed products are cheaper than foamed plastics for the same amount of packaging materials, and have broad application prospects

(2) the manufacturing process of plant fiber foaming products using foaming agent is basically the same as that of plant fiber foaming products without foaming agent, except that the medium of power generation is not water vapor, but various foaming agents. This method is easy to control foaming. At present, the foaming agents mainly include sodium bicarbonate, urea, azodimethylamine, toluene sulfonphthalein cake, etc. Some of the foaming agents have adverse effects on the environment, so if they are improperly selected, they will have a certain impact on the environment in the production process, as well as in the use and recycling process

there are two main methods of making plant fiber foaming products: one-step molding and two-step molding

the process feature of one-step molding is that it adopts integral pouring foaming molding, and its process flow is mainly: material mixing - pulping - pouring - foaming molding - ripening - demoulding - finished product

the technological feature of two-step molding is that the recycled old books, newspapers or other plants are crushed and ground into fibrous shape, which is mixed with starch in a certain proportion, and then made into cylindrical particles with a diameter of 1 ~ 3 mm in an extruder. In the extrusion process, the raw materials are foamed by water vapor to form granular foamed pulp. Using foamed pulp particles as raw materials, the foamed pulp particles are sent into a special metal mold for pressure heating to make packaging products with corresponding shapes

the production line of plant fiber foaming products is mainly composed of the following equipment: pulverizer, mixing machine that plays a decisive role in measuring the tension accuracy, reaction kettle, particle expander, pneumatic conveyor, product forming machine, "fetscher introduced, as well as control system, hydraulic system, air system, power system, heating system and other auxiliary equipment

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