Process for making full-degradable paper mulching film for agricultural use from agronomic crop stalks

Abstract

Disclosed is a method for making an agricultural full-degradation paper film by crop straws. The plant full-degradation agricultural paper film substitutes for the plastic film and is used for farmland mulching, resulting in good economic benefit and complete elimination of serious soil pollution caused by the plastic film. Development and use of the paper film made of plant fibers can produce good biodegradability. The method uses agricultural straw fibers as raw materials, and adopts a high-tech and novel process technique, namely a degradation method by dipping and oxidation catalysis, without high temperature and high pressure, and having no generation of black smoke and pollution; straw fibers can be degraded intactly without alkali, thereby changing properties of lignin, separating colloid ash content, and improving the physical property. The paper film made of straws has properties of wet-dry strength, warmth retaining and light transmittance required for applications, and is applicable to various weather such as wind and rain, overcast and shine by properly adding necessary additives; and the product has advantages of good full biodegradation performance, non pollution, low cost and strong market competitiveness.

Description

Technical field: [0001] Fully degradable agricultural paper mulch is used to cover farmland, instead of plastic mulch, and eliminates the serious pollution caused by plastic mulch to the soil. The development and use of plant fiber as paper mulch has good biodegradability. Background technique: [0002] The efficiency increase (about 20%) of agricultural polyethylene mulch film in agricultural production has been widely valued and recognized by the society, and has become a huge demand and an indispensable means of production. However, since the fragments of the plastic mulch film after use remain in the soil and cannot be decomposed, the soil structure is destroyed. According to the test of the relevant unit: the use of polyethylene mulch film in the wheat field for two consecutive years left about 6 kg per mu, and the wheat yield decreased by 9%; it was used continuously for 5 years, and the residual of about 20 kg per mu land reduced the wheat yield by 20%. The polyethy...

AI Technical Summary

Problems solved by technology

The use of agricultural plastic film to keep heat, moisture and fertilizer has a better effect on increasing production; but long-term use will destroy the soil structure, seriously affect the growth of crop roots, the land will be polluted, and the yield will decrease, which greatly restricts the promotion and application of agricultural film.

[0004] After years of hard work in the research and development of agricultural film in the world, only starch agricultural film has made a breakthrough, but it has not reached the level of wide application due to its high price (13 times that of polyethylene film).

Images