CN107567896A - A kind of slim non-woven agricultural mulching and preparation method of degrading of printing opacity - Google Patents
A kind of slim non-woven agricultural mulching and preparation method of degrading of printing opacity Download PDFInfo
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- CN107567896A CN107567896A CN201710881404.XA CN201710881404A CN107567896A CN 107567896 A CN107567896 A CN 107567896A CN 201710881404 A CN201710881404 A CN 201710881404A CN 107567896 A CN107567896 A CN 107567896A
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- Biological Depolymerization Polymers (AREA)
Abstract
The invention belongs to technical field prepared by agricultural mulching, there is provided a kind of slim non-woven agricultural mulching and preparation method of degrading of printing opacity.Flaxen fiber is first cut into long fibre by this method, and solve beam screening and remove colloid, starch and dust etc., then using the mixed solution immersion treatment of sodium hydroxide and sodium sulfite, and pulp liquor is made using blasting procedure, through defibrination, mashing and paper-making process, the thin layer non-woven fabrics with macroscopic void is made, then spray treatment is carried out to macroscopic void using thermoplastic starch, through hot pressing plasticizing forming, you can the slim non-woven degraded agricultural mulching of printing opacity is made.Compared with conventional method, the invention solves the technical bottleneck that the defects of flaxen fiber mulch film translucency is low and low thickness and high intensity are difficult to get both.
Description
Technical field
The invention belongs to technical field prepared by agricultural mulching, there is provided a kind of slim non-woven degraded agricultural mulching of printing opacity
And preparation method.
Background technology
Agricultural mulching is the important means of production of modern agriculture.The extensive use of agricultural plastic ground membrane soverlay technique is greatly
The development of raising and the agricultural production of crop yield is promoted, meanwhile, also bring increasingly severe " white pollution ".
Because plastic film with chemical fibre makees raw material, its main component is polypropylene, polyvinyl chloride, can remain the centuries in field and not drop
Solution.With the increase of plastic film lifespan, the plastic film scraps remained in soil are more and more, if things go on like this cause
Soil hardening, permeability are deteriorated, soil fertility declines, and have had a strong impact on growing for crop, cause crop production reduction, some ground
Square underproduction amplitude is up to more than 20%, and this case further deteriorates.It is reported that the annual residual quantity 350,000 of China's agricultural film
T, up to 42%, the plastic film of nearly half residues in soil residual rate.Covering with ground sheeting is quickly grown at present.With plastic film
The growth of area coverage, the pollution problem that it brings are also more and more tighter.Therefore, serious pollution has caused society caused by plastic film
The serious concern of meeting all circles and worry.
In order to make full use of the production-increasing function of mulch film, while eliminate the farmland soil fertility that plastic film is brought and decline and environment dirt
The harmful effects such as dye, in recent decades, domestic and international scientific worker has carried out widely studied for this problem, have developed more
Novel degradable plastics are planted to substitute traditional plastics.Wherein non-woven film forming is that can not pass through the degradable material system of thermoplastic blown film
Standby mulch film provides a preferable path.By non-woven film forming, flaxen fiber is prepared into mulch film in the form of non-woven fabrics, kept away
The defects of fiber is difficult to make mulch film is all the time exempted from.Flaxen fiber is prepared into mulch film by non-woven so that the drop of mulch film
Solution property is substantially improved, can be with the degradable modifying agent for serving as soil after having used.
At present, there are some progress to agricultural mulching, especially numb mulch film both at home and abroad.Zhang etc. has invented one kind
The preparation method of fiber paper base mulch film, the mixture of ramee or viscose staple fibre or ramie and viscose staple fibre is sheared
Pre-processed；Then polyamide fibre net filtration is used, filters off slurries, washing, 80 DEG C of drying；To ramee or viscose staple fibre or ramie
The mixture of fiber crops and viscose staple fibre adds water that fiber dispersion system is made；Dispersant, penetrating agent JFC are added, and stirs, be beaten
Until form finely dispersed fiber slurry；Fiber slurry is poured into polyamide fibre net handshcet former to copy handsheet is made, by handsheet
It is dried to obtain paper mulch sheet semi-finished product；By PVA solution brush on the surface of the mulch film semi-finished product of acquisition, its leaching is made by pressure roller extruding
Mulch film semi-finished product are being filled the submergence of atoleine again after drying, are carrying out an immersing and rolling processing by the uniform bubble removing side by side of glue；So
Preliminary drying is carried out afterwards and is baked.In terms of numb mulch film, Hemp Inst., China Academy of Agricultural Sciences Wang et al. has invented a kind of environmental protection
Type fiber crops mulch film and its manufacturing process, the numb mulch film are that flaxen fiber synthesis resinoid type adhesive is bonded the film formed, film surface
It is accompanied by the waterproof layer of one layer of permeable watertight.The manufacturing process of the numb mulch film of the present invention is:The blended shredding of flaxen fiber, dedusting remove
After miscellaneous, first once combed through carding machine, shell numb networking, then secondary networking is carried out through random web-laying equipment, after secondary networking
Fibrilia net carry out chemical adhesion consolidation film forming with adhesive, numb mulch film surface after consolidation applies water repellent and carries out surface
Water-proofing treatment, most carry out satinage through cold-rolling mill afterwards.
As fully visible, the environmental disruption of conventional plastic film is very big, and the preferable flaxen fiber of environment friendly is non-woven
Preparing non-woven fabrics mulch film and be different from common thermoplastic Blown film, obvious than conventional plastic the thickness of thickness, its translucency is extremely low,
Even with attempt to making, non-woven fabrics thickness is thinner, and due to the opaqueness of flaxen fiber itself, the lifting of its printing opacity is not notable, and intensity meeting
Drastically reduce.For problem above, it is proposed that a kind of slim non-woven degraded agricultural mulching of printing opacity and preparation method, its is notable
Advantage be non-woven fabrics by the way that flaxen fiber to be prefabricated into slim macropore, be according to this skeleton, thermoplastic starch be compressed on macropore
Place, so as to form using flaxen fiber as net, thermoplastic starch is the non-woven numb mulch film of nethike embrane, and it is saturating to efficiently solve numb mulch film
Photosensitiveness is poor, the defects of thin layer intensity difference, and can be degradable.Used so as to promote the large-scale promotion of numb mulch film.
The content of the invention
It is poor for the numb mulch film translucency of existing degraded, it is thicker the defects of, the present invention proposes a kind of slim non-woven agriculture of printing opacity
It is the non-woven fabrics by the way that flaxen fiber to be prefabricated into slim macropore with the numb mulch film of degraded and preparation method, its significant advantage, according to this
For skeleton, thermoplastic starch is compressed at macropore, so as to form using flaxen fiber as net, thermoplastic starch is that the non-of nethike embrane is knitted
Numb mulch film is made, it is poor to efficiently solve numb mulch film translucency, the defects of thin layer intensity difference, and can be degradable.Effectively solve
Conventional method flaxen fiber mulch film translucency, low thickness and high intensity are difficult to the technical bottleneck to get both, have good promote
Property.
Concrete technical scheme of the present invention is as follows：
A kind of preparation method of the slim non-woven agricultural numb mulch film of degraded of printing opacity, is first cut into long fibre, and solve beam by flaxen fiber
Screening removes colloid, starch and dust etc., then using the mixed solution immersion treatment of sodium hydroxide and sodium sulfite, and adopts
Slurries are made with blasting procedure, through defibrination, mashing and paper-making process, the thin layer non-woven fabrics with macroscopic void is made, then using thermoplastic
Property starch to macroscopic void carry out spray treatment, through hot pressing plasticizing forming, you can be made printing opacity it is slim it is non-woven it is agricultural degraded fiber crops ground
Film；What is prepared comprises the following steps that：
（1）Flaxen fiber is cut into long fibre in fibre cutting machine, after its naturally dry to moisture content is less than 3%, imported
In roll squeezer, fibre structure is set to tend to be loose under the high pressure effect between roller, and then solve beam and obtain microfibre；It is then introduced into sieve
In extension set, it is sieved using netted vibratory sieve, most of powdery colloid, starch and dust in flaxen fiber is removed, obtains
The fine flaxen fiber higher to purity；
（2）The mixed solution of certain density sodium hydroxide and sodium sulfite is configured, with step（1）The fine flaxen fiber of gained is pressed
Ratio mixes, and stirs, at normal temperatures and pressures immersion treatment certain time, is then introduced into steam blasting device, applies certain
Pressure, raw material moment explosion is entered in receiver after handling certain time, obtain flaxen fiber paper pulp；Then high consistency refining is used
Machine carries out three sections of defibrinations to paper pulp, then it is beaten with PFI mills；Then paper pulp is poured on grid cloth and be provided with uniformly greatly
On the paper machine of hole, l Water Paper page is formed it into, then through press dewatering, thin layer and the flaxen fiber nonwoven with macroscopic void is made
Cloth；
（3）Using spray equipment, in step（2）Thermoplastic starch is sprayed at the macroscopic void of the non-woven fabrics of gained, has all been sprayed
Afterwards, progress is hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics
Further drying and dehydrating is obtained, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
Preferably, step（1）The flaxen fiber is one in ramie, jute, piemarker, hemp, flax, bluish dogbane or gombo hemp
Kind is several, and the long fiber length after it cuts is 50 ~ 80mm；
Preferably, step（1）The roll gap pressure of the roll squeezer is 120 ~ 150MPa；
Preferably, step（1）The screen-aperture of the netted vibratory sieve is 2 ~ 3mm；
Preferably, step（2）In the mixed solution, the mass fraction of sodium hydroxide is 2 ~ 4%, the mass fraction of sodium sulfite
For 5 ~ 8%；
Preferably, step（2）The mixing quality ratio of the mixed solution and flaxen fiber is 1:5~1:4；
Preferably, step（2）The time of the immersion treatment is 20 ~ 24h；
Preferably, step（2）The explosion treatment pressure is 1 ~ 1.3MPa；
Preferably, step（2）The mashing revolution is 5000 ~ 8000 turns；
Preferably, step（2）A diameter of 3 ~ 6mm of the macroscopic void；
Step（3）Institute's thermoplastic starch is from the thermoplastic starch reported at present；It is further preferred that the thermoplastic starch
One kind in the gelatinized starch slurry for being 25% for solid content, esterification starch slurry, etherification starch slurry.
Preferably, step（3）The hot pressing temperature is 120 ~ 150 DEG C.
A kind of slim non-woven agricultural numb mulch film of degraded of printing opacity, it is characterized in that being prepared by the above method.The printing opacity
The slim non-woven agricultural numb mulch film of degraded is the non-woven fabrics for preparing thin layer by flaxen fiber copy paper method and having macroscopic void, further spray
Thermoplastic starch is applied, thermoplastic starch forms light-transmissive film at the macroscopic-void of non-woven fabrics after hot pressing, obtains the non-woven fiber crops of light-transmission type
Mulch film.
Flaxen fiber is cut into long fibre by the present invention, is then dried, rolling absent-mindedness makes flaxen fiber solution beam be microfibre, sieve
Divide and remove most of powdery colloid, starch, dust；Then slurrying, thin layer is prepared by copy paper method and there is the nonwoven of macroscopic void
Cloth, thermoplastic starch is further sprayed, thermoplastic starch not only serves as fiber binder, and thermoplastic starch exists after hot-pressing
Light-transmissive film is formed at the macroscopic-void of non-woven fabrics, obtains the non-woven numb mulch film of light-transmission type.Its significant advantage is by by flaxen fiber
The non-woven fabrics of slim macropore is prefabricated into, is according to this skeleton, thermoplastic starch is compressed at macropore, so as to form with flaxen fiber
For net, thermoplastic starch is the non-woven numb mulch film of nethike embrane, efficiently solves that numb mulch film translucency is poor, and thin layer intensity difference lacks
Fall into, and can be degradable.Used so as to promote the large-scale promotion of numb mulch film.
In the preparation process of the present invention, the preparation process of fine flaxen fiber belongs to physical process, and its control is not required to excessively
Finely.In slurries preparation and defibrination, mashing, paper-making process, reply technical process is strictly controlled.Sodium hydroxide mainly with
Acidic materials reaction in flaxen fiber, and the energy a small amount of lignin of dissolution, therefore its dosage can not be too big.Meanwhile sodium hydroxide play it is swollen
Swollen dose of effect, sodium sulfite is set to be more easy to immerse fibrous inside, and fiber is more easy to completely separate during making explosion, defibrination.It is sub-
Sodium sulphate can play oxidant effect, while can increase the hydrophilic radical of fiber surface, beneficial to improve in hot pressing fiber with
The bond strength of thermoplastic starch.Pulping process is to promote the cell membrane of fiber bulk, layers delamination, is being copied
Reintegrated during paper, the hemicellulose separated plays a part of bonding agent in mashing, can be between reinforcing fiber and fine
Bond strength between dimension and thermoplastic starch, to improve every mechanical property of mulch film.
The invention provides a kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, with prior art phase
Than, its protrude the characteristics of and excellent effect be：
1. numb mulch film prepared by the present invention, using flaxen fiber as net, thermoplastic starch is nethike embrane, and mutual bond strength is higher, thin
The tensile strength and elongation at break of film are higher, meet requirement.
2. numb mulch film prepared by the present invention, thickness can as little as 0.008 ~ 0.01mm, the lighter weight of unit area, can save
Cost.
3. numb mulch film prepared by the present invention, because the nethike embrane in structure is thermoplastic starch, its translucency is fine, does not influence
Crop daylighting.
4. numb mulch film prepared by the present invention, flaxen fiber and starch are biodegradable, and the feature of environmental protection is good.
5. the method preparation method of the present invention is simple, formula and technique are easily controllable, scale application can be achieved.
Embodiment
Below by way of embodiment, the present invention is described in further detail, but this should not be interpreted as to the model of the present invention
Enclose and be only limitted to following example.In the case where not departing from above method thought of the present invention, according to ordinary skill knowledge
The various replacements or change made with customary means, should be included in the scope of the present invention.
Embodiment 1
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Ramee is cut into the long fibre that length is 80mm in fibre cutting machine, treats that its naturally dry is low to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 120MPa between roller, and then solve beam and obtain
Microfibre.It is then introduced into screening machine, uses aperture to be sieved for 2mm netted vibratory sieve to it, removes in flaxen fiber
Most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configure hydroxide mass fraction be 4%,
Sodium sulfite mass fraction is 5% mixed solution, and 1 is pressed with flaxen fiber:4 mass ratio mixing, stirs, normal in normal temperature
Immersion treatment 20h is depressed, is then introduced into steam blasting device, enters raw material moment explosion after 8min is handled under 1MPa pressure
In receiver, flaxen fiber paper pulp is obtained.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then it entered with PFI mills
8000 turns of row mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 6mm, made
It forms l Water Paper page, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
The gelatinized starch that solid content is 25% is sprayed at the macroscopic void of non-woven fabrics to starch, and after all having sprayed, is entered under 150 DEG C and 150MPa
Row is hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics is entered
The drying and dehydrating of one step, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 1, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Embodiment 2
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Hemp is cut into the long fibre that length is 60mm in fibre cutting machine, treats that its naturally dry is low to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 130MPa between roller, and then solve beam and obtain
Microfibre.It is then introduced into screening machine, uses aperture to be sieved for 2mm netted vibratory sieve to it, removes in flaxen fiber
Most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configure hydroxide mass fraction be 2%,
Sodium sulfite mass fraction is 5% mixed solution, and 1 is pressed with flaxen fiber:4 mass ratio mixing, stirs, normal in normal temperature
Immersion treatment 24h is depressed, is then introduced into steam blasting device, enters raw material moment explosion after handling 5min under 1.3MPa pressure
Enter in receiver, obtain flaxen fiber paper pulp.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then ground with PFI to it
Carry out 5000 turns of mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 3mm,
L Water Paper page is formed it into, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
Spray the esterification starch that solid content is 25% at the macroscopic void of non-woven fabrics to starch, after all having sprayed, under 120 DEG C and 200MPa
Carry out hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics obtains
Further drying and dehydrating, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 2, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Embodiment 3
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Tossa is cut into the long fibre that length is 70mm in fibre cutting machine, treats that its naturally dry is low to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 140MPa between roller, and then solve beam and obtain
Microfibre.It is then introduced into screening machine, uses aperture to be sieved for 2mm netted vibratory sieve to it, removes in flaxen fiber
Most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configure hydroxide mass fraction be 3%,
Sodium sulfite mass fraction is 7% mixed solution, and 1 is pressed with flaxen fiber:5 mass ratio mixing, stirs, normal in normal temperature
Immersion treatment 22h is depressed, is then introduced into steam blasting device, enters raw material moment explosion after handling 7min under 1.2MPa pressure
Enter in receiver, obtain flaxen fiber paper pulp.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then ground with PFI to it
Carry out 6000 turns of mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 4mm,
L Water Paper page is formed it into, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
The etherification starch slurry that solid content is 25% is sprayed at the macroscopic void of non-woven fabrics, after all having sprayed, at 130 DEG C and 160MPa
Lower progress is hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics obtains
To further drying and dehydrating, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 3, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Embodiment 4
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Piemarker fiber is cut into the long fibre that length is 70mm in fibre cutting machine, treats that its naturally dry is low to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 140MPa between roller, and then solve beam and obtain
Microfibre.It is then introduced into screening machine, uses aperture to be sieved for 3mm netted vibratory sieve to it, removes in flaxen fiber
Most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configure hydroxide mass fraction be 3%,
Sodium sulfite mass fraction is 7% mixed solution, and 1 is pressed with flaxen fiber:4 mass ratio mixing, stirs, normal in normal temperature
Immersion treatment 23h is depressed, is then introduced into steam blasting device, enters raw material moment explosion after handling 7min under 1.1MPa pressure
Enter in receiver, obtain flaxen fiber paper pulp.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then ground with PFI to it
Carry out 7000 turns of mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 5mm,
L Water Paper page is formed it into, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
The thermoplastic starch slurry of glycerine plasticising is sprayed at the macroscopic void of non-woven fabrics, after all having sprayed, under 140 DEG C and 180MPa
Carry out hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics obtains
Further drying and dehydrating, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 4, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Embodiment 5
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Flax fiber is cut into the long fibre that length is 60mm in fibre cutting machine, treats that its naturally dry is low to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 150MPa between roller, and then solve beam and obtain
Microfibre.It is then introduced into screening machine, uses aperture to be sieved for 2mm netted vibratory sieve to it, removes in flaxen fiber
Most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configure hydroxide mass fraction be 3%,
Sodium sulfite mass fraction is 7% mixed solution, and 1 is pressed with flaxen fiber:5 mass ratio mixing, stirs, normal in normal temperature
Immersion treatment 21h is depressed, is then introduced into steam blasting device, enters raw material moment explosion after handling 5min under 1.3MPa pressure
Enter in receiver, obtain flaxen fiber paper pulp.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then ground with PFI to it
Carry out 7500 turns of mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 4mm,
L Water Paper page is formed it into, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
The thermoplastic starch that spraying polyethylene alcohol is plasticized at the macroscopic void of non-woven fabrics, after all having sprayed, under 150 DEG C and 150MPa
Carry out hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics obtains
Further drying and dehydrating, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 5, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Embodiment 6
A kind of printing opacity slim non-woven agricultural degrade numb mulch film and preparation method, it prepares the detailed process for numb mulch film of degrading such as
Under：
Apocynum fibre is cut into the long fibre that length is 70mm in fibre cutting machine, treats its naturally dry to moisture content
After 3%, import in roll squeezer, fibre structure is tended to be loose under the high pressure effect of the 150MPa between roller, and then solve beam and obtain
To microfibre.It is then introduced into screening machine, uses aperture to be sieved for 3mm netted vibratory sieve to it, removes flaxen fiber
In most of powdery colloid, starch and dust, obtain the higher fine flaxen fiber of purity；Configuring hydroxide mass fraction is
2%th, sodium sulfite mass fraction is 8% mixed solution, and 1 is pressed with flaxen fiber:4 mass ratio mixing, stirs, in normal temperature
Immersion treatment 24h under normal pressure, it is then introduced into steam blasting device, enters raw material moment explosion after handling 5min under 1MPa pressure
Enter in receiver, obtain flaxen fiber paper pulp.Then three sections of defibrinations are carried out to paper pulp using high-density paste mill, then ground with PFI to it
Carry out 6500 turns of mashing.Then paper pulp is poured on grid cloth on the paper machine for the macroscopic void for being provided with uniform a diameter of 3mm,
L Water Paper page is formed it into, then through press dewatering, thin layer and the bast fiber nonwoven fabric with macroscopic void is made；Using spray equipment,
The thermoplastic starch of dimethyl sulfoxide (DMSO) plasticising is sprayed at the macroscopic void of non-woven fabrics, after all having sprayed, at 120 DEG C and 190MPa
Lower progress is hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics obtains
To further drying and dehydrating, that is, the slim non-woven agricultural numb mulch film of degraded of printing opacity is made.
The numb mulch film obtained to embodiment 6, tests its thickness, light transmittance, tensile strength and elongation at break, and with it is common
Numb mulch film contrast, obtained data are as shown in table 1.
Table 1：
| Specific embodiment | Thickness（mm） | Light transmittance（%） | Tensile strength（MPa） | Elongation at break（%） |
| Common numb mulch film | ＞ 0.1 | 35 | 24.5 | 285 |
| Embodiment 1 | 0.008 | 92 | 36.7 | 312 |
| Embodiment 2 | 0.009 | 91 | 37.1 | 336 |
| Embodiment 3 | 0.01 | 94 | 35.6 | 342 |
| Embodiment 4 | 0.01 | 90 | 36.4 | 338 |
| Embodiment 5 | 0.008 | 90 | 36.8 | 329 |
| Embodiment 6 | 0.01 | 89 | 37.8 | 327 |
From table 1：
（1）The method of the present invention, the smaller numb mulch film of thickness can be made, and in the case where numb ground film thickness reduces, preferably
Its mechanical property is maintained, tensile strength and common numb mulch film are similar, do not reduce, elongation at break increases on the contrary.
（2）Numb mulch film prepared by the present invention, its light transmittance are 2 ~ 3 times of common numb mulch film, are highly suitable as farming land
Film.
Claims (10)
1. a kind of preparation method of the slim non-woven degraded agricultural mulching of printing opacity, is first cut into long fibre, and solve beam by flaxen fiber
Screening removes colloid, starch and dust etc., then using the mixed solution immersion treatment of sodium hydroxide and sodium sulfite, and adopts
Slurries are made with blasting procedure, through defibrination, mashing and paper-making process, the thin layer non-woven fabrics with macroscopic void is made, then using thermoplastic
Property starch spray treatment is carried out to macroscopic void, through hot pressing plasticizing forming, you can printing opacity slim non-woven degraded agricultural mulching is made；
What is prepared comprises the following steps that：
（1）Flaxen fiber is cut into long fibre in fibre cutting machine, after its naturally dry to moisture content is less than 3%, imported
In roll squeezer, fibre structure is set to tend to be loose under the high pressure effect between roller, and then solve beam and obtain microfibre；It is then introduced into sieve
In extension set, it is sieved using netted vibratory sieve, most of powdery colloid, starch and dust in flaxen fiber is removed, obtains
The fine flaxen fiber higher to purity；
（2）The mixed solution of certain density sodium hydroxide and sodium sulfite is configured, with step（1）The fine flaxen fiber of gained is pressed
Ratio mixes, and stirs, at normal temperatures and pressures immersion treatment certain time, is then introduced into steam blasting device, applies certain
Pressure, raw material moment explosion is entered in receiver after handling certain time, obtain flaxen fiber paper pulp；Then high consistency refining is used
Machine carries out three sections of defibrinations to paper pulp, then it is beaten with PFI mills；Then paper pulp is poured on grid cloth and be provided with uniformly greatly
On the paper machine of hole, l Water Paper page is formed it into, then through press dewatering, thin layer and the flaxen fiber nonwoven with macroscopic void is made
Cloth；
（3）Using spray equipment, in step（2）Thermoplastic starch is sprayed at the macroscopic void of the non-woven fabrics of gained, has all been sprayed
Afterwards, progress is hot-forming, thermoplastic starch is formed light-transmissive film, and to being bonded between non-woven fabrics fiber, while non-woven fabrics
Further drying and dehydrating is obtained, that is, the slim non-woven degraded agricultural mulching of printing opacity is made.
A kind of 2. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（1）The flaxen fiber is the one or more in ramie, jute, piemarker, hemp, flax, bluish dogbane or gombo hemp, after it cuts
Long fiber length be 50 ~ 80mm.
A kind of 3. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（1）The roll gap pressure of the roll squeezer is 120 ~ 150MPa.
A kind of 4. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（1）The screen-aperture of the netted vibratory sieve is 2 ~ 3mm.
A kind of 5. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（2）In the mixed solution, the mass fraction of sodium hydroxide is 2 ~ 4%, and the mass fraction of sodium sulfite is 5 ~ 8%.
A kind of 6. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（2）The mixing quality ratio of the mixed solution and flaxen fiber is 1:5~1:4.
A kind of 7. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（2）The time of the immersion treatment is 20 ~ 24h；The explosion treatment pressure is 1 ~ 1.3MPa；The mashing revolution is 5000
~ 8000 turns；A diameter of 3 ~ 6mm of the macroscopic void.
A kind of 8. preparation method of the slim non-woven degraded agricultural mulching of printing opacity according to claim 1, it is characterised in that：Step
Suddenly（3）Institute's thermoplastic starch is from one kind in the gelatinized starch slurry, esterification starch slurry, etherification starch slurry that solid content is 25%.
A kind of 9. slim non-woven degraded agricultural mulching of printing opacity, it is characterized in that being prepared by any one of claim 1-8 methods described
Obtain.
A kind of 10. slim non-woven degraded agricultural mulching of printing opacity according to claim 9, it is characterised in that：The printing opacity is thin
The non-woven degraded agricultural mulching of type is the non-woven fabrics of the macroscopic void prepared by flaxen fiber, further sprays thermoplastic starch, hot pressing
Thermoplastic starch forms light-transmissive film at the macroscopic-void of non-woven fabrics afterwards, the non-woven numb mulch film of obtained light-transmission type.
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| CN115387153A (en) * | 2022-08-24 | 2022-11-25 | 陕西科技大学 | Full-coal-carbon waste humic acid paper-based functional degradable mulching film and preparation method thereof |
| CN116607350A (en) * | 2023-05-16 | 2023-08-18 | 李有明 | Degradable paper mulching film and preparation method thereof |
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