CN104532662A

CN104532662A - Preparation method of mulch film for tobacco mulching cultivation

Info

Publication number: CN104532662A
Application number: CN201410458585.1A
Authority: CN
Inventors: 陈启杰; 王萍
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2014-09-11
Filing date: 2014-09-11
Publication date: 2015-04-22
Anticipated expiration: 2034-09-11
Also published as: CN104532662B

Abstract

The invention discloses a preparation method of a mulch film for tobacco mulching cultivation. The method adopts tobacco stem wastes and partially-bleached needlebush fibers as main raw materials, comprises: extraction of tobacco stems, pulp grinding with a high-concentration disc grinder, bleaching with hydrogen peroxide, combining with bleached needlebush sulfate pulp, and mixing with a specific function additive, and is a processing method for processing agricultural paper for tobacco mulching cultivation by a special method. The mulch film has high decay resistance and good agricultural adaptability; when used for tobacco mulching cultivation, the mulch film can increase the temperature, preserve moisture, promote tobacco growth and development, improve tobacco quality, and inhibit field weeds without herbicides; after mulching for about 40 days, the mulch film can degrade naturally in the soil, and thus causes no white pollution like plastic mulch films.

Description

One preparation method growing tobacco culture underglass mulch film paper

Technical field

The invention belongs to speciality paper technical field, particularly a preparation method growing tobacco culture underglass mulch film paper.

Background technology

Tobacco culture underglass has and heats damping, drought-relief, waterlogging-preventing, improves cigarette strain growing environment, improves utilization rate of fertilizer, in improvement, the illumination condition of lower tobacco leaf, alleviate the effect such as weeds and the harm of sick worm, the breeding time of cigarette strain can be shortened, alleviate cigarette strain Later growth low temperature to the impact of quality of tobacco.Common ground film generally includes the material such as polyvinyl chloride, haloflex, common ground film covers in the tobacco leaf production for many years of various places and is widely used, but this type of mulch film, owing to not easily reclaiming, not easily degrading, is trapped in soil and has a strong impact on soil texture, and cause " white pollution ".

Vega gathers the preliminary working after tobacco leaf to producing packaged cigarette overall process, can produce the offal accounting for greatly former cigarette material total amount 1/3, broken leaf, broken end etc., how be used economically by these a considerable number of leftover bits and pieces, have great importance.Utilize tobacco leftovers to produce the reconstituted tobacoo reproduced at present, and it is back to production of cigarettes process, be one of effective way realizing useless cigarette material comprehensive utilization, but also have a large amount of tobacco stem wastes effectively not utilize.Tobacco stem waste through making beating, with slurry, is manufactured paper with pulp into the mulch film paper meeting tobacco culture underglass by the present invention, can natural degradation, is back to tobacco planting endless-chain, realizes the comprehensive utilization of offal waste material.

Summary of the invention

The object of this invention is to provide a preparation method growing tobacco culture underglass mulch film paper.Prepared mulch film paper has enough mechanical strengths and good water resistant, anticorrosion, ventilative, heat-insulating property.

Technical problem to be solved by this invention is: comprehensive utilization tobacco stem waste, provides that a kind of production technology is simple, cost is low and intensity, WATER RESISTANCE etc. meet the preparation method of tobacco culture underglass mulch film paper.

Technical solution of the present invention is carried out according to following steps:

1) by offal at temperature 70 C, liquor ratio is flood extracting 1h under the hot water conditions of 1:5, is swapped out by extract, then extracting, altogether extracting 3 times, and after Separation of Solid and Liquid, offal is for subsequent use;

2) adopted by the offal of extracting process the high-density paste mill of multiple stage series connection to carry out defibrination, offal slurry defibrination is 63-66 to beating degree ^oSR;

3) adopt hydrogen peroxide bleaching to bleach offal slurry, hydrogen peroxide use 3-4%, alkali ratio is 1, temperature 70-80 DEG C, time 1h, DTPA 0.2-0.3%, MgSO ₄0.05%, Na ₂siO ₃2-3%, starches dense 10%, offal slurry whiteness 52-56%ISO after hydrogen peroxide bleaching;

4) by bleached softwood wood sulfate pulp after hydrabrusher pulping, through double plate mill making beating to 40-45 ^osR;

5) by the bleached softwood of 30% wood sulfate pulp with 70% offal starch after pond with slurry mixes, enter flow apperach;

6) by mass percentage, add the cationic starch accounting for both softwood pulp and offal slurry sum 1.0% ~ 1.2% respectively, the AKD sizing agent of 0.2%-0.4%, the PAE wet strength agent of 1.5%-2.0%, fully pump into stock pump after mixing and copy front stock tank preparation copy paper;

7) slurry is by fan pump, scummer, pressurized screen, add 0.03% ~ 0.05% cationic polyacrylamide laggard enter head box online, enter web part of paper machine dehydration, dewatering to concentration further by mechanical expression roller is again 35%-40%, and l Water Paper page forms page by cylinder dried again, two roll-in light, coil into roller, rewinding is packaged into finished product paper bowl.

Technique effect of the present invention: the present invention makes full use of tobacco stem waste and prepares tobacco culture underglass mulch film paper, there is higher rot-fastness energy and good agronomy adaptability, adopt this mulch film paper culture underglass tobacco, moisturizing can be heated, promote that tobacco growing is grown, improving quality of tobacco, when not using herbicide, playing the effect suppressing weeds in field; After about 40 days, paper film strength fades away, and natural degradation, in soil, can not cause the white pollution of similar plastics mulch film.

Basic mechanical design feature index of the present invention:

Quantitative: 45-55g/m ²

Dry tensile strength: >=3.0km

Wet dry by force than: >=20%

Operating period: 40-45 days

Degradation rate: 100%

Accompanying drawing explanation

Fig. 1 is process chart of the present invention.

Detailed description of the invention

embodiment 1:

By offal at temperature 70 C, liquor ratio is flood extracting 1h under the hot water conditions of 1:5, is swapped out by extract, extracting again, altogether after extracting 3 times, after Separation of Solid and Liquid, adopted by the offal of extracting process 2 high-density paste mills of connecting to carry out defibrination, offal slurry defibrination is to beating degree 63 ^oSRafter enter to kowtow rear stock tank.Adopt hydrogen peroxide bleaching to bleach offal slurry, hydrogen peroxide use 3%, alkali ratio is 1, temperature 70 C, time 1h, DTPA0.2%, MgSO ₄0.05%, Na ₂siO ₃2%, starch dense 10%, whiteness 52%ISO after the drift of offal slurry;

By bleached softwood wood sulfate pulp by belt conveyer after hydrabrusher pulping, through double plate mill defibrination to 40 ^osR; The bleached sulphate softwood pulp of 30% is starched after pond with slurry mixes with the offal of 70%, by mass percentage, add the cationic starch of 1.0% respectively, the AKD sizing agent of 0.3%, the PAE wet strength agent of 1.5%, fully pumps into stock pump after mixing and copies front stock tank preparation copy paper;

Slurry is by fan pump, one-level three sections of scummers, after one-level two sections of pressurized screens, add 0.04% cationic polyacrylamide laggard enter head box online, enter web part of paper machine dehydration, dewatering to concentration further by mechanical expression rod is again 38%, and l Water Paper page forms page by cylinder dried again, two roll-in light, directly coil into roller, rewinding is packaged into finished product paper bowl.The quantitative 48g/m of mulch film paper manufactured paper with pulp ², dry tensile strength: 3.2km, wet dry strong than 0.22, after covering 40 days Tobacco phases, 100% degrades, and effectively improves quality of tobacco.

embodiment 2:

By offal at temperature 70 C, liquor ratio is flood extracting 1h under the hot water conditions of 1:5, is swapped out by extract, extracting again, altogether after extracting 3 times, after Separation of Solid and Liquid, adopted by the offal of extracting process 2 high-density paste mills of connecting to carry out defibrination, offal slurry defibrination is to beating degree 65 ^oSRafter enter to kowtow rear stock tank.Adopt hydrogen peroxide bleaching to bleach offal slurry, hydrogen peroxide use 3.5%, alkali ratio is 1, temperature 75 DEG C, time 1h, DTPA0.3%, MgSO ₄0.05%, Na ₂siO ₃3%, starch dense 10%, whiteness 54%ISO after the drift of offal slurry;

By bleached softwood wood sulfate pulp by belt conveyer after hydrabrusher pulping, through double plate mill defibrination to 43 ^osR; The bleached sulphate softwood pulp of 30% is starched after pond with slurry mixes with the offal of 70%, by mass percentage, add the cationic starch of 1.2% respectively, the AKD sizing agent of 0.35%, the PAE wet strength agent of 2.0%, fully pumps into stock pump after mixing and copies front stock tank preparation copy paper;

Slurry is by fan pump, one-level three sections of scummers, after one-level two sections of pressurized screens, add 0.05% cationic polyacrylamide laggard enter head box online, enter web part of paper machine dehydration, dewatering to concentration further by mechanical expression rod is again 38%, and l Water Paper page forms page by cylinder dried again, two roll-in light, directly coil into roller, rewinding is packaged into finished product paper bowl.The quantitative 49g/m of mulch film paper manufactured paper with pulp ², dry tensile strength: 3.4km, wet dry strong than 0.23, after covering 40 days Tobacco phases, 100% degrades, and effectively improves quality of tobacco.

Claims

1. the tobacco culture underglass preparation method of mulch film paper, is characterized in that, it carries out according to following steps:

7) slurry is by fan pump, scummer, pressurized screen, add 0.03% ~ 0.05% cationic polyacrylamide laggard enter head box online, enter web part of paper machine dehydration, dewatering to concentration further by mechanical expression rod is again 35%-40%, and l Water Paper page forms page by cylinder dried again, two roll-in light, coil into roller, rewinding is packaged into finished product paper bowl.