CN104452467B - A kind of slim natural color food wrapper and preparation method thereof - Google Patents
A kind of slim natural color food wrapper and preparation method thereof Download PDFInfo
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- CN104452467B CN104452467B CN201310433524.5A CN201310433524A CN104452467B CN 104452467 B CN104452467 B CN 104452467B CN 201310433524 A CN201310433524 A CN 201310433524A CN 104452467 B CN104452467 B CN 104452467B
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Abstract
The present invention relates to a kind of slim natural color food wrapper and preparation method thereof, belongs to food wrapper field in paper industry, wherein：The brightness of the slim natural color food wrapper is 18 55%, quantification of 16 25g/m2Slim natural color food wrapper slurry used when preparing includes that 20 30% wood pulp and 70 80% does not float straw pulp, it is preferred that 22 28% wood pulp and 72 78% does not float straw pulp, the beating degree for not floating straw pulp is 38 53 ° of SR, with the addition of oil-proofing agent in slim natural color food wrapper slurry used when preparing.The slim natural color food wrapper of the present invention is mainly manufactured paper with pulp using the straw pulp that do not float of low beating degree, overcome the technology prejudice of the higher beating degree of thin page wrapping paper needs of manufacturing paper with pulp using straw pulp, and obtained paper strength height, low cost, environmental friendliness, noxious substance not being contained, its preparation method overcomes and prepares the high problem of slim food wrapper difficulty using straw pulp.
Description
Technical field
The present invention relates to a kind of slim natural color food wrapper, belongs to food wrapper field in paper industry, especially
It is related to a kind of use wood pulp and does not float slim natural color food wrapper of pulp production and preparation method thereof.
Background technology
Food wrapper is the paper packing material of the ready-to-eat foods such as confection, ice lolly, cake.Food wrapper is to food
Product provide protection, prevent food from receiving external microbe or other Substances Pollutions, prevent or reduce Food Oxidation and other reaction sides
There is irreplaceable effect in face.Food wrapper is indispensable for human lives, with the quick increasing of national economy
The continuous improvement of long and quality of life, China's food wrapper field is developed rapidly.In order to make full use of the natural resources
Reduce the expense such as postal delivery and transport as far as possible, the multiple wrapping papers for producing light basis weight are the development of our times various countries paper products
Trend.Therefore, food wrapper gradually presents the trend of slimming, and the food wrapper of light basis weight is also beneficial to reduce
Packaging for foodstuff rubbish, strengthens environmental conservation.
Slim food wrapper not only will bear larger tension force and pulling force in use in the case of very thin, and
And to also have the specific functions such as grease proofing, waterproof, protection against the tide, heat-resisting, easy bonding.At present, food wrapper mainly adopts bleached wood pulp
Produced, but China timber resources is deficient, current China's timber resources is far from being met growing pulping and paper-making work
The needs of industry.
China is large agricultural country, is traditionally used for Semen Tritici aestivi, Oryza sativa L., Cotton Gossypii and the annual production of corn lamp straw of pulping and paper-making about
4.9 hundred million tons.Grass fiber aboundresources, is manufactured paper with pulp food wrapper using straw pulp, the production of food wrapper can be greatly lowered
Cost., compared with wood pulp, average fiber length is short, fibre diameter is little, it is stiff to seem, fibrocyte wall thickness, cell are little, miscellaneous for straw pulp
Cell content is more.When therefore carrying out beating process using papermaking straw pulp, beating degree rising quickly but is difficult to realize outside fine fibre
Change.
The construction of straw pulp fiber can be divided into intercellular layer, primary wall, outer layer of secondary wall, central layer of secondary and secondary wall internal layer,
Primary wall is the porous film of one layer of similar plastics, and its thickness is 0.1-1 microns, the webbed arrangement of its fine fibre.From
Come from the point of view of structure view, it is isotropic, and lignin content is higher, thus it can only be permeable, and is unable to swollen, can also on the contrary
The swollen of central layer of secondary is limited in beating.Property of the outer layer of secondary wall in physical arrangement or chemical composition all with secondary wall
It is close.Central layer of secondary and secondary wall internal layer are the major parts of fiber, and lignin content is relatively low.Straw pulp secondary wall thickening outer layer
Thicker and relatively tight with central layer of secondary bonding, in pulping process it is difficult to remove, therefore, the water suction swollen of fiber and fine fibre
Change all extremely difficult.
Common method for bleaching is the bleaching of Strong oxdiative type, being capable of xylogen degradation so as to fragmentation and dissolution, while to fiber
Element and hemicellulose also have Oxidation.Cellulose and hemicellulose are degraded in the presence of bleach acutely, after causing bleaching
Straw pulp in fibre length shorten, fiber size diminishes, and fiber fines are more, drainage rate decline.Meanwhile, in plant cell
Parenchyma cell is a lot, is easy to crush in pulping process, and this causes straw pulp beating degree to raise rapidly, until 80-90 ° of SR
When, fiber just has an obvious lobe sub-wire, but now fiber has been chopped extremely short, causes the excessive cut-out of fiber, not only shadow
The intensity of paper is rung into, and drainage is difficult when manufacturing paper with pulp.
As slim food wrapper is quantitatively low, in general intensity is also than relatively low, in order to obtain higher paper strength,
Higher beating degree is generally needed.In addition, slim food wrapper reach quality standards require while, to paper formation etc.
Presentation quality also has higher requirement, and one shapes good slim food wrapper fibrous tissue and answers uniformity, distribution
One.Slim food wrapper requires, therefore pulp freeness requirement identical with thin page wrapping paper due to quantitative with physical strength
Should be similar.In thin page wrapping paper production, paper pulp used requires fiber longitudinal splitting, and fiber fines are more, and brooming is preferable.Tissue paper is given birth to
In product require into slurry beating degree in 80 ° of more than SR, belong to high wet stock.(referring to Zhang Shengli, " pitch of the wire is in senior thin page
Application in paper production ", Heilungkiang papermaking, 2003 (2)：39-39).Required in slim food wrapper production is beaten into slurry
Degree should also meet above-mentioned requirements.
" discussion of tissue paper paper pulp technology of being manufactured paper with pulp with little Garcinia mangostana, Mang Ganjiang gardens net paper machine " (" is used referring to Xiao Delin
Little Garcinia mangostana, Mang Ganjiang gardens net paper machine are manufactured paper with pulp the discussion of tissue paper paper pulp technology ", Guangdong paper, 1989 (3)：31-35)
Manufactured paper with pulp thin page wrapping paper using a certain amount of wood pulp of awns bar hill bamboo pulp adapted.By little Garcinia mangostana and awns bar slurry carry out steaming and decocting, bleaching,
Manufactured paper with pulp after washing, beating, the paper quality parameter for obtaining thin page wrapping paper is as follows：Quantitative 21g/m2, tightness 0.6g/cm3,
Whiteness 77.1%, average fracture length 4.15km, tearability 78mN, 0/m of dirt count2.Requirement to refining pulp quality is：Fiber fills
Divide water suction swollen, flexibility plasticity is good, brooming rate should reach more than 20%, 5-8 ° of SR of degree of hydration, average fiber length 1.0-
1.2mm, 80 ° of more than SR of beating degree, weight in wet base 4-6g.
" colored II type thin page wrapping paper production technology " (referring to Wang Zengguo " colored II type thin page wrapping paper production technology ",
Northern papermaking, 1994 (4)：38-39) manufactured paper with pulp the thin page wrapping paper of colored II type using reed pulp.By reed pulp steaming and decocting, washing, sieve
Choosing, purify, bleaching, beating, filled, dyeing after carry out copy paper, prepared paper quality parameter is as follows：Quantitative 21.5g/
m2, the average 2.92km of fracture length, tearability longitudinal direction 78mN.It is beaten using medium shiny beating mode in mashing step, is beaten
Slurry concentration 6.8-6.9%, into slurry beating degree 60-62 ° SR.
Both approaches all prepare light basis weight and the standard compliant thin page wrapping paper of quality using straw pulp, but in order to improve
The intensity of paper, the uniformity and smoothness, the paper pulp used during preparation are all higher into slurry beating degree.It can be seen that, generally believe and adopt
The thin page wrapping paper of quality conformance with standard is prepared with straw pulp needs higher beating degree.As slim food wrapper is quantitative and physics
Intensity requirement is identical with thin page wrapping paper, and therefore slim food wrapper pulp freeness requires also reach above-mentioned requirements.
However, there is problems with pulp freeness height：First, the beating degree for improving straw pulp can cause beating time to prolong
Long, power consumption increases, and production capacity reduces；Second, bad, the viscous pressure roller of straw pulp drainage in paper-making process can be caused, glued
Drying cylinder, makes page break end, and paper defects increases, and directly influences the speed and productivity ratio of paper machine；3rd, due to beating equipment
Roller knife and the shear action of bed plate, improving beating degree can cause straw pulp fiber exceedingly to cut off, and substantially reduce the intensity of paper,
Particularly tearability.
In order to solve the above problems, overcoming needs the technology of higher beating degree inclined using manufacture paper with pulp slim food wrapper of straw pulp
See, need using low beating degree and can realize that the slim true qualities food bag for meeting quality standard prepared by the straw pulp of fibrillating
Dress paper.At present, the slim food wrapper for not floating straw pulp and wood pulp preparation using relatively low beating degree is not yet found.More do not send out
Now using the preparation method for not floating slim food wrapper prepared by straw pulp and wood pulp of relatively low beating degree.
Content of the invention
An object of the present invention is to provide a kind of slim natural color food wrapper.Described slim true qualities packaging for foodstuff
In paper, slurry therewith is mainly low beating degree and does not float straw pulp, and beating time is short, reduce Specific energy, improve food wrapper
Intensity and quality stability, and the slim natural color food wrapper smooth surface, uniformity, can bear quite big
Tensile strength, can adapt to high speed machine production operation.
To achieve these goals, the technical solution used in the present invention is：
A kind of slim natural color food wrapper, the brightness of the slim natural color food wrapper is 18-55%, quantification of
16-25g/m2, during the slim natural color food wrapper preparation, slurry used includes the wood pulp and 70-80% of 20-30%
Do not float straw pulp, the preferably wood pulp of 22-28% and 72-78% does not float straw pulp, and the beating degree for not floating straw pulp is 38-53 ° of SR,
Oil-proofing agent be with the addition of in slim natural color food wrapper slurry used when preparing.
Slim food wrapper manufacture paper with pulp with straw pulp more much more difficult than general cultural paper of manufacturing paper with pulp, this is because straw pulp tool
The characteristics of having itself.As well known to those skilled in the art, compared with wood pulp, fibre length is short for straw pulp, and fibre diameter is little, it appears very
Firmly, cell wall thickness, cell are little, and heteroproteose cell content is more.Therefore, food wrapper is produced with straw pulp, refining pulp quality is had higher
Requirement, " discussion of tissue paper paper pulp technology of being manufactured paper with pulp with little Garcinia mangostana, Mang Ganjiang gardens net paper machine " (referring to Xiao Delin " use
Little Garcinia mangostana, Mang Ganjiang gardens net paper machine are manufactured paper with pulp the discussion of tissue paper paper pulp technology ", Guangdong paper, 1989 (3)：31-35)
To refining pulp quality requirement it is：Fiber fully absorbs water swollen, and flexibility plasticity is good, brooming rate should reach more than 20%,
5-8 ° of SR of degree of hydration, average fiber length 1.0-1.2mm, 80 ° of more than SR of beating degree, weight in wet base 4-6g.It can be seen that, prior art is general
Think, straw pulp is manufactured paper with pulp and requires into slurry beating degree during tissue paper is produced in 80 ° of more than SR.
To have prepared various aspects of performance parameter all very excellent for the straw pulp that do not float that the present invention proposes using a kind of low beating degree
Slim natural color food wrapper, overcome the prejudice of prior art.Of the present invention do not float straw pulp beating degree low, beating
Time is short, reduce Specific energy, reduces cost, improves production capacity, and therefore there is huge economic benefit and society
Benefit；The present invention is added a small amount of wood pulp in the slurry and overcomes asking for the simple thin page wrapping paper low intensity prepared using straw pulp
Topic, improves the quality of slim food wrapper；The slim packaging for foodstuff pulp material major part of the present invention is prevented using straw pulp is not floated
The waste gas discharged in bleaching straw pulp, waste liquid pollution on the environment, and then reduce the thin page wrapping paper of preparation true qualities
When pollution on the environment.
The straw pulp that do not float can also be that the straw pulp beating degree after process is 38-48 ° through the straw pulp of oxygen delignification
SR, preferably 40-46 ° SR, more preferably 41-45 ° SR, most preferably 42-44 ° SR.
The tightness of the slim natural color food wrapper is 0.5-1.0g/cm3, preferably 0.55-0.95g/cm3, more preferably
0.6-0.9g/cm3, most preferably 0.64-0.85g/cm3；Vertically and horizontally average tensile index 24-65N.m/g, preferably 25-64N.m/g,
More preferably 29-63N.m/g, most preferably 33.5-62.9N.m/g；Burst index 1.5-4.5kPa m2/ g, preferably 1.8-
4.3kPa·m2/ g, more preferably 2.0-4.0kPa m2/ g, most preferably 2.1-3.5kPa m2/g.
The saturating oil content of the slim natural color food wrapper is<0.25mm20-2/100cm2, >=0.25mm20/
100cm2.
The quantification of 18-24g/m of the slim natural color food wrapper2, preferably 18-22g/m2, more preferably 18-20g/m2.
The air permeability of the slim natural color food wrapper is 14-41 μm/Pa s, preferably 15-20 μm/Pa s；Described
The moisture of slim natural color food wrapper is 6.0-8.0%, preferably 7.0-8.0%；The slim natural color food wrapper bright
Spend for 30-55%；The dirt count of the slim natural color food wrapper is 0.3-1.5mm20-2/m2, 0.5-1.5mm20/
m2, >=1.5mm20/m2；Non-fiber dust is 0.1-0.3mm20-20/m2, 0.3-1.5mm20/m2, 0.5-1.5mm20
Individual/m2, >=1.5mm20/m2.
Slim natural color food wrapper of the present invention does not float straw pulp as primary raw material with beating degree as 38-53 ° of SR, must
Will when coordinate a certain amount of wood pulp, then be beaten and obtained after being manufactured paper with pulp.As the straw pulp that adopted is one kind through peroxide
The low beating degree of drift lignin does not float straw pulp, and which has drainage rate fast, the premium properties such as intensity height, obtained slim true qualities
Food wrapper paper flat smooth, paper fibre even tissue, intensity are high, quality is good.
Quantitative little, the thickness of thin of slim food wrapper；Paper requires that fibrous tissue is uniform, and flat appearance, paper are fine and smooth,
Paper strength is high.Require in the production of slim food wrapper it is generally believed that straw pulp is manufactured paper with pulp into slurry beating degree in 80 ° of more than SR.
Instant invention overcomes the prejudice of prior art, it is all very excellent that proposition prepares various aspects of performance parameter using low beating degree straw pulp
Slim food wrapper, be a kind of with low cost, environmental protection, more colory compared with the food wrapper of prior art
Product.
As the straw pulp for being adopted is through oxygen delignification, reduce cellulose hemicellulose crystallization index, fibre structure is dredged
Pine, makes the easy fibrillating of straw pulp, beating easily, improve the water filtering performance of paper pulp, reduce beating degree, reduce defibrination energy
Consumption；Described do not float straw pulp and the straw pulp after bleaching compares fibre strength and improves 30-50%, fiber yield improves 10%, in length and breadth
Average fracture length improves 2-5%, so that the intensity of slim natural color food wrapper is greatly improved, such as fracture length
With tearability etc.；Straw pulp consumption is big, reduces cost, has saved timber resources；Meanwhile, a small amount of wood pulp of interpolation overcomes and makes merely
The problem of the food wrapper low intensity prepared with straw pulp, improves the quality of food wrapper.
In addition, as the whole world is to the pay attention to day by day preserved the ecological environment, the contaminated wastewater that pulp bleaching process is produced by
People are recognized.Contain toxic stronger material in pulp bleaching effluent and its sludge, such as two English toxicity greatly, have carcinogenic by force
Property, mutagenesis and cause birth defect, male can be made to feminize, affect child growth promoter, and cause Multiple Brain neuropathy and
Acute toxication, particularly has acute toxicity to aquatile, very big to environmental disruption.And also containing residual in the paper pulp after bleaching
Toxicant is stayed, is limited the purposes of wrapping paper, such as be cannot be used for packaging for foodstuff.Slim true qualities packaging for foodstuff of the present invention
Paper eliminates the complicated blanching step of step in preparation process, preparation technology is further simplified, and fundamentally
Waste gas, the waste liquid pollution on the environment discharged in bleaching straw pulp is again prevented, and then has reduced and prepare slim true qualities food
Pollution on the environment during product wrapping paper.And institute in bleaching process is not contained in prepared slim natural color food wrapper
The noxious substance of generation.
Another object of the present invention is to providing a kind of preparation side for preparing slim natural color food wrapper of the present invention
Method, the preparation method process is simple, obtained slim natural color food wrapper quality are high.
To achieve these goals, the technical solution used in the present invention is：
A kind of preparation method of the slim natural color food wrapper, including：
The preparation method of slim natural color food wrapper described in a kind of claim 1-6 any one, it is characterised in that：Institute
The preparation method that states includes：
1) dogstail raw material is carried out steaming and decocting, then after carrying out shove, washing, discongest, obtains described not floating straw pulp；Or discongest
Afterwards, oxygen delignification, the straw pulp for obtaining are carried out；
2) by wood pulp and described do not float straw pulp and be beaten respectively, the wood pulp beating consistency is 3.0-4.5%, described not
It is 3.0-4.0% to float straw pulp beating consistency, and after beating terminates, the obtained wood pulp beating degree into slurry is 55-65 ° of SR, is beaten
Weight in wet base is 5.0-7.0g, and the obtained straw pulp beating degree of not floating into slurry is 38-53 ° of SR, is beaten weight in wet base >=1.3g；
3) by beating after the above-mentioned wood pulp of slurry 20-30% and the above-mentioned of 70-80% do not float straw pulp mix equal to slurry
Even, add mix homogeneously after oil-proofing agent, the addition of oil-proofing agent is starched for 4-7kg/ tons；
4) by step 3) obtained by slurry manufactured paper with pulp, obtain the slim natural color food wrapper.
Dogstail raw material of the present invention includes the one kind or several in Caulis et Folium Oryzae, wheat straw, cotton stalk, bagasse, phragmites communiss or Arundo donax
The combination that plants.
Step 1 of the present invention) described in steaming and decocting, shove, wash, discongest adopt prior art.
Step 1 of the present invention) described in oxygen delignification include：Straw pulp will be obtained after steaming and decocting is pumped to oxygen delignification reaction
Tower, and add sodium hydroxide, magnesium sulfate, oxygen；The straw pulp carries out delignification reaction in the oxygen delignification reaction tower, obtains not
Drift straw pulp.
The straw pulp that do not float of the present invention refers to straw pulp not through chloride conventional bleaching.
Of the present invention do not float straw pulp, by carrying out oxygen delignification after steaming and decocting to straw pulp, eliminate steaming using oxygen and alkali
The a large amount of lignins retained after boiling, reduce cellulose hemicellulose crystallization index, and fibre structure is loose, makes the easy fine fibre of straw pulp
Change；Meanwhile, reduce the degraded and damage of useful to papermaking cellulose and hemicellulose in straw pulp raw material as far as possible, maintain grass
The intrinsic length of pulp fibres.The straw pulp fiber is cellulose and hemicellulose.
For straw pulp, fibrillating under low beating degree has the impact of following several respects to oxygen delignification process：(1) straw pulp
Hydrogen bond fracture between fiber fine fibre, it is easy to which longitudinal splitting and sub-wire occur.Cellulose and hemicellulose are in alkaline solution
Obvious swollen is produced, due to the hydrogen bond oxidation between the effect straw pulp fiber fine fibre of the oxygen dissolved in swollen pressure and alkali liquor
Rupture, reduces cellulose and hemicellulose crystallization index, and cellulose crystallite area receives destruction, and fibre structure becomes loose, fine
Dimension wildness.(2) oxygen delignification eliminates partial lignin, alleviates limit of the lignin to cellulose hemicellulose swollen
System.In the presence of alkali liquor and oxygen, the lignin of primary wall and outer layer of secondary wall is degraded in a large number, and the oxygen dissolved in alkali liquor
Easily through the fiber surface of swollen has been produced, enter fibrous inside, be mixed in cellulose and hemicellulose or with
The lignin that cellulose hemicellulose is combined closely reacts, and the removal of lignin is conducive to profit of the straw pulp fiber in beating
Swollen, there is longitudinal splitting and produce fine fibre；(3) alleviate pulping process to act on the transversely cutting of straw pulp fiber.De- through peroxide
The abundant swollen of straw pulp fiber after lignin, fiber become flexible, flexible, generate the phenomenons such as deformation, curling and kink, can make
The transversely cutting being not readily susceptible in straw pulp fiber pulping process；(4) purity of cellulose and hemicellulose is improve.The de- wood of oxygen
During element between straw pulp fiber skin Organic substance and fiber impurity under the effect of the oxygen also can dissolution in alkali liquor, reduce straw pulp
Middle impurity and the content of tiny cell, improve the purity of useful to papermaking cellulose in straw pulp and hemicellulose, improve
The drainage rate of straw pulp.The impact of above several respects makes the abundant swollen bending of the straw pulp fiber after oxygen delignification, fiber table
Face starts to fluff, and is conducive to cellulose and hemicellulose fibrillating in follow-up mashing step.
Preferably described oxygen delignification of the invention is single hop oxygen delignification, using an oxygen delignification reaction tower；Described
Straw pulp concentration is 8-18%, and temperature of the straw pulp in the reaction tower entrance is 90-100 DEG C, and pressure is 0.9-1.2Mpa；Go out
Temperature at mouthful is 95-105 DEG C, and pressure is 0.2-0.4Mpa；In described oxygen delignification, alkali charge is with sodium hydroxide
2-4% of the meter to oven dry stock amount, 3-5% of the magnesium sulfate consumption for oven dry stock amount, the addition of oxygen are starched for 20-40kg/ tons；Institute
Response time of the straw pulp that states in the reaction tower is 60-90 minutes.
The present invention using single hop oxygen delignification primarily to be further ensured that the intensity of paper pulp, with respect to multistage oxygen delignification
For, single hop oxygen delignification is less to the Degradation of cellulose.The technological parameter of currently preferred single hop oxygen delignification is total
For temperature relatively low, relative time is longer, primarily to gentleer carries out delignification reaction, is avoided to fiber as far as possible
The degraded of element.During oxygen delignification, add magnesium sulfate successfully control the degraded of cellulose as protective agent, maximum
Degree protects damage of the oxygen delignification process to cellulose and hemicellulose.
Preferably concentration of the straw pulp before oxygen delignification is carried out of the invention is 8-18%.In dense under the conditions of carry out oxygen take off
Lignin, major advantage is：Investment is little；Dense mixing and the success of pumping technology due in, the process of slurry are more much easier than highly concentrated；
Slurry concentration is relatively low, and the corrosion of equipment is few, the danger that does not also burn in oxygen.Straw pulp is not floated after oxygen delignification
Beating degree is 32-36 ° of SR.Straw pulp after oxygen delignification only needs light beating just can realize fibrillating, reaches and copies
Make the requirement of food wrapper.
Beating of the present invention is carried out in double-arc spline fiberizer.
Described do not float straw pulp and the wood pulp is separately beaten, refining pulp quality is easily controlled, and each slurry is all reached optimal
Intensity.And avoid that beating is uneven, few fibers are too beaten, and few fibers are beaten inadequate situation.
Of the present invention manufacturing paper with pulp is carried out in long network multi-cylinder paper machine.
Step 2 of the present invention) described in wood pulp beating consistency be 3.2-4.0%, the straw pulp beating consistency that do not float is
3.0-4.0%, after beating terminates, the obtained wood pulp beating degree into slurry is 58-64 ° of SR, and beating weight in wet base is 5.0-
5.5g；Obtained is 40-46 ° of SR into straw pulp beating degree is not floated described in slurry, and beating weight in wet base is 1.4-1.8g.
Step 3 of the present invention) add additive in slurry, the additive includes starching dispersant, alkane in interior starch, slurry
Base ketene dimer and drying cylinder remover.
The addition of additive of the present invention is respectively：Starch 8-10kg/ tons slurry in slurry, dispersant 1-5kg/ tons in slurry
Slurry, alkyl ketene dimer 8-12kg/ tons are starched.
In the slurry, starch can improve the bursting strength and tensile strength of slim natural color food wrapper, increase deflection and resist
Pull-up and linting.In the slurry dispersant can effectively dispersing pulp fiber, improve fiber fines and filling retention, improve
Paper pulp evenness and the pliability of paper, make the paper being copied into avoid hole, evenness high, good hand touch, it is also possible to improve speed of manufacturing paper with pulp.Institute
It is a kind of more common rubber polymer of papermaking to state alkyl ketene dimer (AKD).AKD is one kind of response type neutral sizing agent, it
Have and cellulose in hydroxyl direct reaction active group, with the hydroxyl direct reaction of cellulose so as to reaching the mesh of applying glue
's.The drying cylinder remover thoroughly can solve the problems, such as to manufacture paper with pulp in viscous cylinder, keep system clean, page can be played without oil mark
Good stripping, lubrication, light enhancing effect；Meanwhile, paper broken end, hair loss, dry linting phenomenon can be also reduced, raising paper by a relatively large margin
Smoothness, glossiness, do not affect the intensity of paper, quality of finished paper is improved, and has good lubrication to drying cylinder creping doctor
Protective effect, extends the service life of scraper.
In for the detection test of harmful substance in slim natural color food wrapper of the present invention, two English and adsorbable
Organohalogen compounds are not detected.
Slim natural color food wrapper of the present invention can add prior art in the slurry according to the needs of product
In the dyestuff commonly used so as to become the food wrapper of shades of colour, not comprising two English and can inhaling in this kind of food wrapper
The insalubrious material such as attached organohalogen compounds.
In order to present disclosure and technical scheme are clearly described, below some nouns used in the present invention are made such as
Give a definition, in the case of the definition made by other any documents and the present invention is inconsistent, with the definition done by the present invention be
Standard, specific as follows：
Of the present invention do not float straw pulp and refer to adopt annual plant, including but be not limited only to wheat straw, Caulis et Folium Oryzae, Cotton Gossypii
Bar, corn straw, Arundo donax, phragmites communiss etc., by their one or more of combination raw materials completely without any bleaching obtained by
Straw pulp.
Wood pulp of the present invention is bleached wood pulp or does not float wood pulp.
Slim natural color food wrapper of the present invention refers to that main is the complete of raw material preparation using grass kind plant
Without food wrapper prepared by the straw pulp obtained by any bleaching and a small amount of wood pulp.
As the food wrapper of the present invention does not float straw pulp by low beating degree and wood pulp is obtained, do not float straw pulp beating degree low,
Beating time is short, reduce Specific energy, reduces cost, improves production capacity, therefore have huge economic benefit and
Social benefit.The invention has benefit that：
(1) slim natural color food wrapper of the invention does not mainly float straw pulp using low beating degree, overcomes in prior art
The technology prejudice of the higher beating degree of food wrapper needs of being manufactured paper with pulp using straw pulp, is reduced the beating cut-out excessive to fiber and is made
With reducing the impact to fracture length, tearability, improve the intensity of paper.
(2) preparation method of slim natural color food wrapper of the invention overcomes and prepares slim wrapping paper beating using straw pulp
The high prejudice of degree, solves because beating degree is high and causes bad, the viscous pressure roller of straw pulp drainage in paper-making process, viscous drying cylinder and paper
There is the phenomenon of broken end in page, obtained food wrapper is homogeneous, smooth surface.
(3) using do not float straw pulp can avoid in bleaching process produce harmful chemical, reduce paper waste, be conducive to
Environmental protection and the cost of enterprise's sewage disposal is substantially reduced, do not contained in bleaching process in the slim natural color food wrapper of the present invention
Produced noxious substance, expands range of application, is such as used for packaging for foodstuff etc..
Specific embodiment
The present invention is described in more detail below in conjunction with embodiment, it should be pointed out that reality given below
Apply example to be merely exemplary, protection scope of the present invention is not constituted and is limited.Those of ordinary skill in the art are without prejudice to this
Can carry out various improvement and change under the spirit of invention, and these changes and change each fall within protection scope of the present invention it
Interior.Protection scope of the present invention is defined by appending claims.
In the examples below that, the various quality index for measuring are measured under the following conditions：Temperature：23.1 DEG C, relative
Humidity：50.9% (after balance).
Embodiment 1
Wheat straw raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 13% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 5% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 4% for adding 20kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 90 DEG C, and pressure is 1.1Mpa, and stopping enables the slurry carry out fully for 75 minutes
Delignification reaction, the temperature in exit is 105 DEG C, and pressure remains 0.2Mpa.The slurry is spurted stock tank after the completion of process
And dilute, obtain described not floating straw pulp.The beating degree for not floating straw pulp is 35 ° of SR.
Wood pulp will not floated and do not float straw pulp and be beaten respectively, do not float wood pulp beating consistency 3.0%, do not float straw pulp beating dense
Degree 3.5%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Wood pulp beating is not floated
55 ° of SR of degree, weight in wet base 5.5g do not float 41 ° of SR of straw pulp beating degree, weight in wet base 1.5g.The wood pulp that do not float does not float wood for prior art
Slurry, including not floating kp softwood pulp, not floating sulphite softwood pulp etc..
The above-mentioned of slurry 30% after by beating does not float wood pulp and the 70% above-mentioned straw pulp that do not float mixes uniform to slurry, adds
Plus in oil-proofing agent 4kg/ tons slurry, slurry, starch 8kg/ tons are starched, dispersant 3kg/ tons are starched, alkyl ketene dimer 10kg/ tons slurry, drying cylinder
Remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtain described slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：18.0g/m2；
Tightness：0.50g/cm3；
Vertically and horizontally average tensile index：29N.m/g；
Burst index：1.8kPa·m2/g；
Air permeability：18μm/(Pa·s)；
Saturating oil content：<0.25mm2：2/100cm2, >=0.25mm2：0/100cm2；Dirt count：0.3-1.5mm2：0/
m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：12/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.4%；
Brightness：40%.
Embodiment 2
Bagasse raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtain after discongesting
8% straw pulp of concentration is pumped in oxygen delignification reaction tower and carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
In with oxygen, the magnesium sulfate to oven dry stock amount 3% and the alkali to oven dry stock amount in terms of sodium hydroxide 3% for adding 20kg/ tons slurry
Liquid mixes, and is passed through steam in pipeline by slurry addition intensification.The slurry is wherein entered after fully mixed in mixing afterwards
Oxygen delignification reaction tower, the temperature of reaction tower entrance is 95 DEG C, and pressure is 0.9Mpa, and stopping enables the slurry be filled for 75 minutes
The delignification reaction for dividing, the temperature in exit is 100 DEG C, and pressure remains 0.4Mpa.The slurry is spurted slurry after the completion of process
Pond simultaneously dilutes, and obtains described not floating straw pulp.The beating degree for not floating straw pulp is 36 ° of SR.
Wood pulp will not floated and do not float straw pulp and be beaten respectively, do not float wood pulp beating consistency 3.5%, do not float straw pulp beating dense
Degree 3.0%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Wood pulp beating is not floated
63 ° of SR of degree, weight in wet base 7.0g do not float 42 ° of SR of straw pulp beating degree, weight in wet base 1.4g.
The above-mentioned of slurry 20% after by beating does not float wood pulp and the 80% above-mentioned straw pulp that do not float mixes uniform to slurry, adds
Plus oil-proofing agent 7kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 5kg/ tons slurry, alkyl ketene dimer 12kg/ tons are starched, dried
Cylinder remover 0.8kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：25.0g/m2；
Tightness：0.55g/cm3；
Vertically and horizontally average tensile index：33.5N.m/g；
Burst index：2.0kPa·m2/g；
Air permeability：14μm/(Pa·s)；
Saturating oil content：<0.25mm2：1/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：0/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.8%；
Brightness：30%.
Embodiment 3
Arundo donax raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 13% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 4% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 2% for adding 30kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 100 DEG C, and pressure is 1.02Mpa, and stopping enables the slurry be filled for 90 minutes
The delignification reaction for dividing, the temperature in exit is 105 DEG C, and pressure remains 0.4Mpa.The slurry is spurted slurry after the completion of process
Pond simultaneously dilutes, and obtains described not floating straw pulp.The beating degree for not floating straw pulp is 35 ° of SR.
Wood pulp will not floated and do not float straw pulp and be beaten respectively, do not float wood pulp beating consistency 3.0%, do not float straw pulp beating dense
Degree 3.7%, beating are carried out in Double-pillar jordan, and after beating, obtained pulp quality standard is：Wood pulp beating is not floated
58 ° of SR of degree, weight in wet base 5.5g do not float 50 ° of SR of straw pulp beating degree, weight in wet base 1.8g.
The above-mentioned of slurry 22% after by beating does not float wood pulp and the 78% above-mentioned straw pulp that do not float mixes uniform to slurry, adds
Plus oil-proofing agent 7kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 5kg/ tons slurry, alkyl ketene dimer 12kg/ tons are starched, dried
Cylinder remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：22.1g/m2；
Tightness：1.0g/cm3；
Vertically and horizontally average tensile index：64N.m/g；
Burst index：4.3kPa·m2/g；
Air permeability：30μm/(Pa·s)；
Saturating oil content：<0.25mm2：2/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：0/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.2%；
Brightness：55%.
Embodiment 4
Straw raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 15% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 3% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 2% for adding 30kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 98 DEG C, and pressure is 1.2Mpa, and stopping enables the slurry carry out fully for 90 minutes
Delignification reaction, the temperature in exit is 95 DEG C, and pressure remains 0.4Mpa.The slurry is spurted stock tank simultaneously after the completion of process
Dilution, obtains described not floating straw pulp.The beating degree for not floating straw pulp is 33 ° of SR.
Wood pulp will not floated and do not float straw pulp and be beaten respectively, do not float wood pulp beating consistency 4.5%, do not float straw pulp beating dense
Degree 4.0%, beating are carried out in Double-pillar jordan, and after beating, obtained pulp quality standard is：Wood pulp beating is not floated
58 ° of SR of degree, weight in wet base 7.0g do not float 53 ° of SR of straw pulp beating degree, weight in wet base 1.5g.
The above-mentioned of slurry 25% after by beating does not float wood pulp and the 75% above-mentioned straw pulp that do not float mixes uniform to slurry, adds
Plus in oil-proofing agent 5kg/ tons slurry, slurry, starch 8kg/ tons are starched, dispersant 1kg/ tons are starched, alkyl ketene dimer 8kg/ tons slurry, drying cylinder
Remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：20.0g/m2；
Tightness：0.64g/cm3；
Vertically and horizontally average tensile index：62.9N.m/g；
Burst index：2.1kPa·m2/g；
Air permeability：14μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：10/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：6.5%；
Brightness：50%.
Embodiment 5
Phragmites communiss raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 12% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 5% and the alkali to oven dry stock amount in terms of sodium hydroxide 3.5% for adding 40kg/ tons slurry
Liquid mixes, and is passed through steam in pipeline by slurry addition intensification.The slurry is wherein entered after fully mixed in mixing afterwards
Oxygen delignification reaction tower, the temperature of reaction tower entrance is 95 DEG C, and pressure is 0.9Mpa, and stopping enables the slurry be filled for 70 minutes
The delignification reaction for dividing, the temperature in exit is 95 DEG C, and pressure remains 0.3Mpa.The slurry is spurted stock tank after the completion of process
And dilute, obtain described not floating straw pulp.The beating degree for not floating straw pulp is 36 ° of SR.
Wood pulp will not floated and do not float straw pulp and be beaten respectively, do not float wood pulp beating consistency 4.0%, do not float straw pulp beating dense
Degree 4.0%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Wood pulp beating is not floated
60 ° of SR of degree, weight in wet base 7.0g do not float 44 ° of SR of straw pulp beating degree, weight in wet base 1.6g.
The above-mentioned of slurry 28% after by beating does not float wood pulp and the 72% above-mentioned straw pulp that do not float mixes uniform to slurry, adds
Plus in oil-proofing agent 6kg/ tons slurry, slurry, starch 9kg/ tons are starched, dispersant 1kg/ tons are starched, alkyl ketene dimer 8kg/ tons slurry, drying cylinder
Remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：16.0g/m2；
Tightness：0.85g/cm3；
Vertically and horizontally average tensile index：63N.m/g；
Burst index：3.8kPa·m2/g；
Air permeability：32μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：20/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.0%；
Brightness：38%.
Embodiment 6
Cotton haulm raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 15% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 3% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 4% for adding 40kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 95 DEG C, and pressure is 0.9Mpa, and stopping enables the slurry carry out fully for 60 minutes
Delignification reaction, the temperature in exit is 95 DEG C, and pressure remains 0.2Mpa.The slurry is spurted stock tank simultaneously after the completion of process
Dilution, obtains described not floating straw pulp.The beating degree for not floating straw pulp is 32 ° of SR.
By bleached wood pulp and do not float straw pulp and be beaten respectively, bleached wood pulp beating consistency 4.2% does not float straw pulp beating dense
Degree 3.9%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Bleached wood pulp is beaten
64 ° of SR of degree, weight in wet base 6.2g；46 ° of SR of straw pulp beating degree, weight in wet base 1.8g are not floated.
The above-mentioned bleached wood pulp of the slurry 30% after by beating and the 70% above-mentioned straw pulp that do not float mix uniform to slurry, add
Plus oil-proofing agent 4kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 3kg/ tons slurry, alkyl ketene dimer 10kg/ tons are starched, dried
Cylinder remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：19.2g/m2；
Tightness：0.60g/cm3；
Vertically and horizontally average tensile index：65N.m/g；
Burst index：4.5kPa·m2/g；
Air permeability：34μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：8/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.8%；
Brightness：54%.
Embodiment 7
It is 1 by mass ratio:3:1 Caulis et Folium Oryzae, wheat straw and phragmites communiss raw material carry out steaming and decocting using conventional method, then carry out shove,
Wash, discongest.18% straw pulp of concentration obtained after discongesting is pumped in oxygen delignification reaction tower and carries out oxygen delignification, should
Slurry is before reaction tower is entered with the oxygen, the magnesium sulfate to oven dry stock amount 4% for adding 20kg/ tons to starch and to over dry in pipeline
The alkali liquor mixing of slurry amount in terms of sodium hydroxide 4%, and steam is passed through in pipeline by slurry addition intensification.The slurry is in mixing afterwards
Oxygen delignification reaction tower is wherein entered after fully mixed, and the temperature of reaction tower entrance is 100 DEG C, and pressure is 1.15Mpa,
Stopping enables the slurry carry out sufficient delignification reaction for 75 minutes, and the temperature in exit is 100 DEG C, and pressure remains 0.4Mpa.
The slurry is spurted stock tank after the completion of process and is diluted, obtain described not floating straw pulp.The beating degree for not floating straw pulp is 33 °
SR.
By bleached wood pulp and do not float straw pulp and be beaten respectively, bleached wood pulp beating consistency 3.9% does not float straw pulp beating dense
Degree 3.7%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Bleached wood pulp is beaten
65 ° of SR of degree, weight in wet base 6.1g do not float 48 ° of SR of straw pulp beating degree, weight in wet base 1.7g.
The above-mentioned bleached wood pulp of the slurry 20% after by beating and the 80% above-mentioned straw pulp that do not float mix uniform to slurry, add
Plus in oil-proofing agent 5kg/ tons slurry, slurry, starch 9kg/ tons are starched, dispersant 1kg/ tons are starched, alkyl ketene dimer 10kg/ tons slurry, drying cylinder
Remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：19.8g/m2；
Tightness：0.55g/cm3；
Vertically and horizontally average tensile index：49N.m/g；
Burst index：1.5kPa·m2/g；
Air permeability：21μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：0/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：8.0%；
Brightness：18%.
Embodiment 8
Wheat straw raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 12% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 3% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 4% for adding 20kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 100 DEG C, and pressure is 1.05Mpa, and stopping enables the slurry be filled for 75 minutes
The delignification reaction for dividing, the temperature in exit is 100 DEG C, and pressure remains 0.3Mpa.The slurry is spurted slurry after the completion of process
Pond simultaneously dilutes, and obtains described not floating straw pulp.The beating degree for not floating straw pulp is 33 ° of SR.
By bleached wood pulp and do not float straw pulp and be beaten respectively, bleached wood pulp beating consistency 3.5% does not float straw pulp beating dense
Degree 3.5%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Bleached wood pulp is beaten
62 ° of SR of degree, weight in wet base 6.8g do not float 38 ° of SR of straw pulp beating degree, weight in wet base 1.6g.
The above-mentioned bleached wood pulp of the slurry 22% after by beating and the 78% above-mentioned straw pulp that do not float mix uniform to slurry, add
Plus oil-proofing agent 4kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 3kg/ tons slurry, alkyl ketene dimer 10kg/ tons are starched, dried
Cylinder remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：22.0g/m2；Tightness：0.59g/cm3；
Vertically and horizontally average tensile index：24N.m/g；
Burst index：3.5kPa·m2/g；
Air permeability：18μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：2/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.2%；
Brightness：53%
Embodiment 9
It is 1 by mass ratio:1 Caulis et Folium Oryzae and wheat straw raw material carry out steaming and decocting using conventional method, then carry out shove, washing, dredge
Solution.10% straw pulp of concentration obtained after discongesting is pumped in oxygen delignification reaction tower and carries out oxygen delignification, and the slurry is entering
Before entering reaction tower in pipeline with add the oxygen of 30kg/ tons slurry, the magnesium sulfate to oven dry stock amount 4% and to oven dry stock amount with
The alkali liquor mixing of sodium hydroxide meter 4%, and steam is passed through in pipeline by slurry addition intensification.The slurry is wherein passed through in mixing afterwards
Entrance oxygen delignification reaction tower after being sufficiently mixed is crossed, the temperature of reaction tower entrance is 100 DEG C, and pressure is 0.9Mpa, stops 80
Minute enables the slurry to carry out sufficient delignification reaction, and the temperature in exit is 100 DEG C, and pressure remains 0.3Mpa.Process
The slurry is spurted stock tank into after and is diluted, obtain described not floating straw pulp.The beating degree for not floating straw pulp is 34 ° of SR.
By bleached wood pulp and do not float straw pulp and be beaten respectively, bleached wood pulp beating consistency 4.3% does not float straw pulp beating dense
Degree 3.9%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Bleached wood pulp is beaten
55 ° of SR of degree, weight in wet base 6.4g do not float 47 ° of SR of straw pulp beating degree, weight in wet base 1.5g.
The above-mentioned bleached wood pulp of the slurry 28% after by beating and the 72% above-mentioned straw pulp that do not float mix uniform to slurry, add
Plus oil-proofing agent 6kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 3kg/ tons slurry, alkyl ketene dimer 10kg/ tons are starched, dried
Cylinder remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：23.9g/m2；
Tightness：0.95g/cm3；
Vertically and horizontally average tensile index：25N.m/g；
Burst index：1.8kPa·m2/g；
Air permeability：15μm/(Pa·s)；
Saturating oil content：<0.25mm2：0/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：1/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：7.4%；
Brightness：40%.
Embodiment 10
Arundo donax raw material is carried out steaming and decocting using conventional method, then is carried out shove, is washed, discongests.Obtained after discongesting is dense
Spending 12% straw pulp and being pumped in oxygen delignification reaction tower carries out oxygen delignification, and the slurry is before reaction tower is entered in pipeline
With oxygen, the magnesium sulfate to oven dry stock amount 3% and the alkali liquor to oven dry stock amount in terms of sodium hydroxide 3% for adding 30kg/ tons slurry
Mixing, and steam is passed through in pipeline by slurry addition intensification.The slurry wherein enters oxygen after fully mixed in mixing afterwards
Delignification reaction tower, the temperature of reaction tower entrance is 95 DEG C, and pressure is 0.9Mpa, and stopping enables the slurry carry out fully for 80 minutes
Delignification reaction, the temperature in exit is 105 DEG C, and pressure remains 0.4Mpa.The slurry is spurted stock tank after the completion of process
And dilute, obtain described not floating straw pulp.The beating degree for not floating straw pulp is 34 ° of SR.
By bleached wood pulp and do not float straw pulp and be beaten respectively, bleached wood pulp beating consistency 4.2% does not float straw pulp beating dense
Degree 3.9%, beating are carried out in double-arc spline fiberizer, and after beating, obtained pulp quality standard is：Bleached wood pulp is beaten
60 ° of SR of degree, weight in wet base 6.2g do not float 43 ° of SR of straw pulp beating degree, weight in wet base 1.8g.
The above-mentioned bleached wood pulp of the slurry 25% after by beating and the 75% above-mentioned straw pulp that do not float mix uniform to slurry, add
Plus oil-proofing agent 4kg/ tons are starched, the interior starch 10kg/ tons slurry of slurry, dispersant 3kg/ tons slurry, alkyl ketene dimer 10kg/ tons are starched, dried
Cylinder remover 0.5kg/ tons are starched, and after mix homogeneously, routinely technique is manufactured paper with pulp, and obtains the slim natural color food wrapper.
Every quality index of the slim natural color food wrapper is as follows：
Quantitatively：23.2.0g/m2；
Tightness：0.90g/cm3；
Vertically and horizontally average tensile index：59N.m/g；
Burst index：4.2kPa·m2/g；
Air permeability：21μm/(Pa·s)；
Saturating oil content：<0.25mm2：2/100cm2, >=0.25mm2：0/100cm2；
Dirt count：0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=1.5mm2：0/m2；
Non-fiber dust：0.1-0.3mm2：0/m2, 0.3-1.5mm2：0/m2, 0.5-1.5mm2：0/m2, >=
1.5mm2：0/m2；
Moisture：6.0%；
Brightness：49%.
Claims (18)
1. a kind of slim natural color food wrapper, it is characterised in that：The brightness of the slim natural color food wrapper is 18-
55%, quantification of 16-25g/m2, during the slim natural color food wrapper preparation, slurry used includes the wood pulp of 20-30%
With the straw pulp that do not float of 70-80%, the straw pulp that do not float is the straw pulp through oxygen delignification, and the straw pulp beating degree after process is
38-48 ° of SR, with the addition of oil-proofing agent in slim natural color food wrapper slurry used when preparing.
2. a kind of slim natural color food wrapper according to claim 1, it is characterised in that：The slim true qualities food bag
What when filling made of paper standby, slurry used included the wood pulp and 72-78% of 22-28% does not float straw pulp.
3. a kind of slim natural color food wrapper according to claim 1, it is characterised in that：Straw pulp beating degree after process
For 40-46 ° of SR.
4. a kind of slim natural color food wrapper according to claim 3, it is characterised in that：Straw pulp beating degree after process
For 41-45 ° of SR.
5. a kind of slim natural color food wrapper according to claim 4, it is characterised in that：Straw pulp beating degree after process
For 42-44 ° of SR.
6. a kind of slim natural color food wrapper according to claim 1, it is characterised in that：The slim true qualities food bag
The tightness of dress paper is 0.5-1.0g/cm3；Vertically and horizontally average tensile index 24-65N.m/g；Burst index 1.5-4.5kPa m2/
g.
7. a kind of slim natural color food wrapper according to claim 6, it is characterised in that：The slim true qualities food bag
The tightness of dress paper is 0.55-0.95g/cm3；Vertically and horizontally average tensile index 25-64N.m/g；Burst index is 1.8-
4.3kPa·m2/g.
8. a kind of slim natural color food wrapper according to claim 7, it is characterised in that：The slim true qualities food bag
The tightness of dress paper is 0.6-0.9g/cm3；Vertically and horizontally average tensile index 29-63N.m/g；Burst index is 2.0-4.0kPa
m2/g.
9. a kind of slim natural color food wrapper according to claim 8, it is characterised in that：The slim true qualities food bag
The tightness of dress paper is 0.64-0.85g/cm3；Vertically and horizontally average tensile index 33.5-62.9N.m/g；Burst index is 2.1-
3.5kPa·m2/g.
10. a kind of slim natural color food wrapper according to claim 1, it is characterised in that：The slim true qualities food
The saturating oil content of wrapping paper is<0.25mm20-2/100cm2, >=0.25mm20/100cm2.
A kind of 11. slim natural color food wrappers according to claim 1, it is characterised in that：The slim true qualities food
The quantification of 18-24g/m of wrapping paper2.
A kind of 12. slim natural color food wrappers according to claim 11, it is characterised in that：The slim true qualities food
The quantification of 18-22g/m of wrapping paper2.
13. slim natural color food wrappers according to claim 12, it is characterised in that：The slim true qualities packaging for foodstuff
The quantification of 18-20g/m of paper2.
A kind of 14. slim natural color food wrappers according to claim 1, it is characterised in that：The slim true qualities food
The air permeability of wrapping paper is 14-41 μm/Pa s；The moisture of the slim natural color food wrapper is 6.0-8.0%；Described thin
The brightness of type natural color food wrapper is 30-55%；The dirt count of the slim natural color food wrapper is 0.3-1.5mm20-2
Individual/m2, 0.5-1.5mm20/m2, >=1.5mm20/m2；Non-fiber dust is 0.1-0.3mm20-20/m2, 0.3-
1.5mm20/m2, 0.5-1.5mm20/m2, >=1.5mm20/m2.
A kind of 15. slim natural color food wrappers according to claim 14, it is characterised in that：The slim true qualities food
The air permeability of wrapping paper is 15-20 μm/Pa s；The moisture of the slim natural color food wrapper is 7.0-8.0%.
The preparation method of slim natural color food wrapper described in a kind of 16. claim 1-15 any one, it is characterised in that：Institute
The preparation method that states includes：
1) dogstail raw material is carried out steaming and decocting, then after carrying out shove, washing, discongest, obtains described not floating straw pulp；Or after discongesting,
Oxygen delignification is carried out, the straw pulp for obtaining；
2) by wood pulp and described do not float straw pulp and be beaten respectively, the wood pulp beating consistency is 3.2-4.0%, described does not float grass
Slurry beating consistency is 3.0-4.0%, and after beating terminates, obtained is 58-64 ° of SR into slurry wood pulp beating degree, and being beaten weight in wet base is
5.0-5.5g；Obtained does not float straw pulp beating degree for 40-46 ° of SR into slurry, and beating weight in wet base is 1.4-1.8g；
3) by beating after the above-mentioned wood pulp of slurry 20-30% and the above-mentioned of 70-80% do not float straw pulp and mix uniform to slurry, add
Plus mix homogeneously after oil-proofing agent, the addition of oil-proofing agent is 4-7kg/ tons slurry；
4) by step 3) obtained by slurry manufactured paper with pulp, obtain the slim natural color food wrapper.
17. preparation methoies according to claim 16, it is characterised in that：Step 3) add additive in slurry, described add
Plus agent includes starching dispersant, alkyl ketene dimer and drying cylinder remover in interior starch, slurry.
18. preparation methoies according to claim 17, it is characterised in that：The addition of the additive is respectively：In slurry
Starch 8-10kg/ tons are starched, and dispersant 1-5kg/ tons slurry in slurry, alkyl ketene dimer 8-12kg/ tons are starched.
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| CN105350377A (en) * | 2015-11-05 | 2016-02-24 | 义乌市义南纸业有限公司 | Bacteriostatic tissue wrapping paper and preparation method thereof |
| CN107034737B (en) * | 2017-05-25 | 2019-06-18 | 句容市兴武包装有限公司 | A method of food wrapper is prepared by matrix of moso bamboo |
| CN107594347A (en) * | 2017-09-30 | 2018-01-19 | 刘期春 | The wrapping paper and the method with wrapping paper production Zongzi that large-scale production Zongzi uses |
| CN110318282B (en) * | 2019-06-12 | 2020-11-10 | 浙江舜浦新材料科技有限公司 | Preparation method of uvioresistant woven base paper |
| CN112982028B (en) * | 2021-03-15 | 2022-06-07 | 浙江理工大学 | Preparation method of biodegradable hydrophobic oilproof paper |
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