Naturally degradative cotton linter plastic film and manufacture process thereof

Abstract

The invention relates to a naturally degradative short linter plastic film and a manufacture process thereof, belonging to the field of plastic films. The manufacture process comprises the following steps: dedusting short linters, ramie short fibers and silk leftover bits; uniformly mixing according to a proportion; cutting short; placing in a cooking boiler; adding NaOH, anthraquinone and water; increasing temperature; keeping pressure; boiling; preparing pulp by a sulphate pulping method; filtering pulp liquid; cleanly flushing filtered substances; adding water to prepare the pulp liquid; beating the pulp liquid at a beating degree of 50 DEG SR; adding daiamid epoxy chloropropane resin and cellulose to uniformly scatter in a pulp scattering machine; diluting with water; forming handsheets in a water circulating handsheet former; airing the handsheets at a room temperature; steeping the handsheets in a whiteruss steeping tank; immediately fishing out and smoothening the handsheets with a brush; enabling the prepared handsheets, i.e. paper-based semi-finished products of non-weaving cloth, to keep still at the room temperature; steeping the semi-finished products in a sizing liquid steeping tank; immediately fishing out and smoothening the semi-finished products; placing the semi-finished products in an oven to prebake so that sizing liquid is fully permeated and stuck to the semi-finished products; and raising the temperature and baking for molding treatment to obtain the naturally degradative short linter plastic film.

Description

Technical field: [0001] The naturally degradable cotton linter mulch film and the preparation process thereof of the present invention relate to a mulch film product. Background technique: [0002] The wide application of plastic agricultural film plays a very important role in improving the yield and quality of crops, solving the problem of early seedling raising and planting in alpine areas, and planting anti-seasonal vegetables and fruits. Due to its natural degradation time of 200-300 years, The recovery of residual film is seriously lagging behind, which has caused shocking "white pollution" to the ecological environment, and the decline of soil compaction and soil fertility has become a common phenomenon. In addition, the extensive use of plastic agricultural film has increased the consumption of limited and non-renewable petroleum resources. Therefore, in the past 30 years, research on degradable agricultural films has been widely carried out at home and abroad, and ...

AI Technical Summary

Problems solved by technology

Among them, the main raw materials used in starch-added biodegradable mulch and photodegradable mulch are still plastics and chemical fibers, which cannot completely eradicate the problem of "white pollution"; plant fiber mulch is mainly paper mulch. Type hemp mulch is represented by a series of paper mulch developed by Japan and other countries using plant fibers such as coniferous wood, broad-leaved wood, hemp, and reed. Paper mulch has poor wind and rain resistance and is easily broken, so it is not suitable for mechanical laying. Membrane and other issues

The degradable liquid mulch film uses lignite, weathered coal or peat to modify waste liquids such as papermaking black liquor, and forms polymers through lignin, cellulose and polysaccharides under the action of cross-linking agents, and then mixes them with various additives, silicon fertilizers, It is obtained by mixing trace elements, pesticides and herbicides, and the effect of heat preservation and moisture conservation of this kind of mulch film is poor

[0003] According to statistics, my country produces more than 500,000 tons of waste natural fibers such as cotton and hemp every year, and it is increasing year by year. These wastes not only endanger the environment, but also cause a great waste of resources.