CN1362469A

CN1362469A - Atmozing agent capable of being used to replace farm mulching and its prepn

Info

Publication number: CN1362469A
Application number: CN 02100581
Authority: CN
Inventors: 高克
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-06
Filing date: 2002-02-06
Publication date: 2002-08-07
Anticipated expiration: 2022-02-06
Also published as: CN1142241C

Abstract

The present invention relates to an atomization agent instead of agricultural plastic mulch film, which is characterized by that it uses vermiculite, diatomaceous earth, ban soil, microcrystal cellulose, yellow clay, cotton pump residue, pregelatinized starch, PVA and water as raw material, respectively adopts the processes of pulverizing, drying and hydrolysis treatment to make them into suspended emulsified liquor, and adopts atomization method to spay it on the soil surface to form protecting shell layer with the actios of antifreezing, raising temp., temp.-insulating, drought-resisting, preserving soil moisture and increasing fertilizer effect, and good air permeability and antiscouring property.

Description

A kind of propellant of alternative agripast mulch film and method for making thereof

Technical field

The present invention relates to a kind of soil insulating covering agent.

Background technology

Plastic film culture underglass The Application of Technology has improved the output of farm crop significantly, and economic benefit and social benefit are very remarkable.But along with the increase of plastic film usage quantity, its negative effect also displays gradually.At first, the residual film in the arable land has formed barrier layer gradually, influences growing and to the absorption of liquid manure, making crop production reduction of crop root.Scholarly forecast, like this more than 20 years, output is with decline 15-20%, if every mu of residual plastic film accumulation in ground reaches more than 34 kilograms, throughput will be lost in the soil.Secondly, plastic film reclaims difficulty, according to measuring and calculating, about 1/3 of plastic film usage quantity remains in the soil, and land structures is damaged, and is placed on the field and flies upward with the wind and reclaim the residual membrane stack come up, or on-site incineration, all can bring pollution, still there is not treating method preferably at present.

Following period of time in the past, people have dropped into great amount of manpower and material resources and financial resources for control above-mentioned " white pollution ", as the use that reduces plastic film, strengthen recycling, producing degradable mulch or the like.Certain effect has been played in these measures, covers the pollution problem that brings to ecotope but can't fundamentally solve chemical products.As use the degradable plastics mulch film, the small shreds that present technology forms the degraded back still is difficult to degraded fully in the regular hour, still soil and plant-growth are worked the mischief, add that product processes complexity, cost height, comprehensive cost are big, effect is also as one wishes not to the utmost, be difficult to the peasant and adopt.

Chinese patent discloses a kind of propellant and method for making thereof that airborne dust, sand, sand devil sand dust are kicked up of controlling for No. 01119804, it is sprayed on propellant on the top layer of administering object with the method for atomizing, form the solidified protection shell, reach and control the purpose that sand and dust are kicked up.But this propellant does not have the effect that accumulation of heat heats, preserves soil moisture and take precautions against drought because goal of the invention and prescription are limit.

Summary of the invention

Technical problem to be solved by this invention provide a kind of replace plastic film, the effective accumulation of heat propellant that heats, preserve soil moisture and take precautions against drought and don't can damage and pollute farmland and environment.

Another technical problem to be solved by this invention provides the making method of The propellant.

The alleged technical problem of the present invention is realized by following technical scheme: a kind of propellant of alternative agripast mulch film, and it makes (weight unit, down together) by following component: vermiculite 8-15; Diatomite 8-16; Soil 10-15; Yellow clay 5-80; Microcrystalline Cellulose 7-32; Cotton pulp dregs of rice 8-38; Pre-gelatinized starch 5-35; PVA 10-50; Water 1000.

The propellant of above-mentioned alternative agripast mulch film also can add water repellent agent therein, and used water repellent agent is dimethyl urea or dimethyl ethyl urea etc., and add-on is 5-20.

The method of said components being made propellant of the present invention is:

1. raw material pulverizing, get vermiculite,

Soil, drying is pulverized, and makes 200-250 purpose meal; Get diatomite, be dried and be ground into 150 purpose meals;

2. get the yellow clay under the face of land, through pulverizing, be screened to the 200-250 order, heavy wash rice, be dried to meal;

3. Microcrystalline Cellulose is made by the diluted hydrochloric acid hydrolysis of natural cellulose;

4. the cotton pulp dregs of rice are made through boiling, washing, making beating, dehydration, drying by linters remaining on the cotton seed hulls;

5. pre-gelatinized starch is gone into extrusion machine extruding, expanded by the starch milk of W-Gum furnishing 15-20%, through pulverizing, be screened into 200-250 purpose meal;

6.PVA be the white powder resin, make by the Vinyl Acetate Copolymer hydrolysis;

Above-mentioned each component is mixed by proportioning, is medium with the normal-temperature water, fuses cmpletely together, is prepared into the suspension emulsion and gets final product.

The making method of above-mentioned propellant, described natural cellulose is a wood pulp, uses hydrochloric acid hydrolysis, 105 ℃ of hydrolysis temperatures, 15 minutes time.

The making method of above-mentioned propellant, the alcoholysis degree of described PVA are 65-89%.

The making method of above-mentioned propellant, described extruder head pressure 3-6MPA, head temperature 130-180 ℃.

Propellant of the present invention can form the protection shell after being sprayed at the face of land, that this shell has is antifreeze, the effect of insulation, drought resisting, soil moisture conservation and increase fertilizer efficiency, and has air permeability and good, anti-water erosion, very helps the growth of farm crop; Material non-toxic in the prescription, harmless can be by the microbiological degradation in the soil, absorption in physical environment, not contaminated soil and environment, and its composition can be used as the organic fertilizer of soil, strengthen the vigor of soil organisms and various enzymes, organic mineralisation process is accelerated, and nutritive element increases in the soil; The recruitment of using this product to save to reclaim waste mulching film, and provide a reliable approach to the pollution of soil and environment for solving residual film; This products material is cheap and easy to get, and production unit and technology are simple, and production process is pollution-free, is a kind of ideal product of alternative agripast mulch film.

Embodiment

Below in conjunction with embodiment the present invention is further specified.

The effect of each component of the present invention is as follows:

Vermiculite: be a kind of secondary metamorphic mineral of magniferous water aluminosilicate of laminate structure, form through hydrothermal alteration effect or weathering by black (gold) mica usually to have very high heat insulation, anti-performance such as freeze.Can buy in market.

Diatomite: be a kind of silicastone, mainly form that special vesicular structure is arranged by being called the unicellular waterplant algae of diatom water remains, have light weight, heat insulation, adsorptivity is strong, abrasiveness is low, the chemical stability advantages of higher.Be light heat insulation material and the absorption agent in the prescription.Can buy in market.

Soil: be a kind of hydrophilic very strong material, volume increases when meeting water, forms thixotropy gel shape material, so thickening effectiveness is arranged.Can be dispersed into as a form of gel and suspension in water medium, this medium solution has certain viscosity, thixotropy and oilness, and the adulterant of it and water, mud or fine sand has plasticity-and cohesiveness.In the prescription as thickening material, tackiness agent.

Yellow clay: be taken to the yellow clay in non-open ground, through pulverizing, be screened to 200 orders-250 order, heavy wash rice, drying are prepared into meal.As the weighting agent in the prescription.

Microcrystalline Cellulose: fiber with fine crystalline structure.The hydrochloric acid of highly purified timber slurry with 2.5mol/L was boiled 15 minutes in 105 ℃, make the non-crystalline region partial hydrolysis, residual crystal region down, and further the latter is carried out machinery or ultrasonication, obtain containing the emulsion of oarse-grained colloidal particle, spraying drying promptly gets pulverous Microcrystalline Cellulose.Mainly as dispersion agent, stablizer, tackifier, the micropore agent in the prescription.

The cotton pulp dregs of rice: employing be to remove weaving to remain on the cotton seed hulls length after with cotton fibre and velveteen less than the short flannel of 10mm.1 ton of cottonseed can obtain the 30-70kg linters, and content of cellulose reaches 65-80%, makes through processes such as boiling, washing, desanding, making beating (purpose is that required short flannel is removed from cotton seed hulls), dehydration and dryings.It uses as complexing agent in prescription.

Pre-gelatinized starch: adopt atomization to be prepared from.Be the pulse jet method, in continous way jet cooking device, with the rapid gelatinization of starch milk, spraying drying is made pre-gelatinized starch then with high compressed steam.Perhaps adopt extrusion process, the starch of soon being transferred to water content 15-20% in advance adds in the extrusion machine, starch produces heat and gelatinization through screw shaft friction extruding, be that the aperture high pressure of 1-10mm is extruded through the aperture then, when entering atmosphere, material instantaneous expansion drying, extruder head pressure 3-6MPA, head temperature 130-180 ℃, puff obtains pre-gelatinized starch through crushing screening 200-250 order.Make tackiness agent, suspension agent in the prescription.

PVA: be white powder, get by the Vinyl Acetate Copolymer hydrolysis.Because content has a large amount of side group-hydroxyls on the molecular chain, it has good water-solubility, film-forming properties, cohesive force and emulsifying property, and remarkable grease resistance and solvent resistance are arranged.Emulsifying agent and protective colloid for letex polymerization.

With above each component rational proportion, be medium with the normal-temperature water, fuse cmpletely together, be prepared into the suspension emulsifying aq.

Each component of above-mentioned propellant can be adjusted in the scope that prescription provides according to different construction objects, provides 3 embodiment below.

Component title (weight part) embodiment 1 embodiment 2 embodiment 3

Vermiculite 8 11 12

Diatomite 8 10 13

Soil 10 15 19

Yellow clay 5 10 28

Microcrystalline Cellulose 79 20

The cotton pulp dregs of rice 8 12 16

Pre-gelatinized starch 5 10 15

PVA 10 16 20

Water 1,000 1,000 1000

Also can add water repellent agent in practice,,, avoid rainwash, lose the function of protection shell to improve the water tolerance of its protection shell as dimethyl urea, dimethyl ethyl urea etc.Because the difference of region, the weight part of added water repellent agent can be adjusted between 5-20.

In practice, this propellant can also add agricultural chemicals, weedicide and fertilizer, becomes multi-functional composite environmental-friendly filming agent.

Can use agricultural atomizer, the method for power driven sprayer during construction, construct on operational level, form the solidified protection shell to atomize, deep and thorough layer 2-5mm, consumption is 1000ml/M ²

Claims

1. the propellant of an alternative agripast mulch film is characterized in that: by weight the unit meter it make by following component:

Vermiculite 8-15;

Diatomite 8-16;

Soil 10-15;

Yellow clay 5-80;

Microcrystalline Cellulose 7-32;

Cotton pulp dregs of rice 8-38;

Pre-gelatinized starch 5-35;

PVA 10-50；

Water 1000.

2. the propellant of alternative agripast mulch film according to claim 1 is characterized in that: also can add water repellent agent therein, used water repellent agent is dimethyl urea or dimethyl ethyl urea etc., and add-on is 5-20.

3. the method for making of the propellant of an alternative agripast mulch film is characterized in that:

A. raw material pulverizing, get vermiculite, Soil, drying is pulverized, and makes 200-250 purpose meal; Get diatomite and pulverize, be dried and be ground into 150 purpose meals;

B. get the yellow clay under the face of land, through pulverizing, be screened to the 200-250 order, heavy wash rice, be dried to meal;

C. Microcrystalline Cellulose is made by the diluted hydrochloric acid hydrolysis of natural cellulose;

D. the cotton pulp dregs of rice are made through boiling, washing, making beating, dehydration, drying by linters remaining on the cotton seed hulls;

E. pre-gelatinized starch is gone into extrusion machine extruding, expanded by the starch milk of W-Gum furnishing 15-20%, through pulverizing, be screened into 200-250 purpose meal; PVA is the white powder resin, is made by the Vinyl Acetate Copolymer hydrolysis;

F. with the reasonable proportioning of above-mentioned each component warp, be medium, fuse cmpletely together, be prepared into the suspension emulsion and get final product with the normal-temperature water.

4. the method for making of the propellant of alternative agripast mulch film according to claim 3 is characterized in that: also can add water repellent agent therein, used water repellent agent is dimethyl urea or dimethyl ethyl urea etc., and add-on is 5-20.

5. according to the method for making of the propellant of claim 3 or 4 described alternative agripast mulch films, it is characterized in that: described natural cellulose is a wood pulp, and used acid is hydrochloric acid, 105 ℃ of hydrolysis temperatures, 15 minutes time.

6. the method for making of the propellant of alternative agripast mulch film according to claim 5 is characterized in that: the alcoholysis degree of described PVA is 65-89%.

7. the method for making of the propellant of alternative agripast mulch film according to claim 6 is characterized in that: described extruder head pressure 3-6MPA, head temperature 130-180 ℃.