CN1184830A - Lignin-base vapor barrier formulations - Google Patents
Lignin-base vapor barrier formulations Download PDFInfo
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- CN1184830A CN1184830A CN96121605A CN96121605A CN1184830A CN 1184830 A CN1184830 A CN 1184830A CN 96121605 A CN96121605 A CN 96121605A CN 96121605 A CN96121605 A CN 96121605A CN 1184830 A CN1184830 A CN 1184830A
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Abstract
This invention provides for a vapor barrier formulation suitable for coating and lamination onto a paper substrate and comprises organosolv lignin in a dispersion, mica and latex. The laminated paper product is recyclable.
Description
In general, the steam shielding is one or more multilayer loading container bag or packing bag barrier, it or itself have to a certain degree prevent that steam from the ability that ambient atmosphere enters packaged product, perhaps is coated with, the dipping or lamination make it have this resistivity material.The steam shielding is general with steam transmission rates (WVTR) assessment, and WVTR is that steam is being given the speed that sees through the steam shielding under fixed temperature and the relative humidity.Steam shielding generally is used for keeping product to avoid causing inner affine to moisture that takes place that thereby physics or chemical transformation can't use of product.
Paper is widely used in many industry and mechanical field, for example production flexible package cardboard, corrugated cardboard and solid fiber cardboard.
The physical properties of paper and low relatively cost be it in some fields welcome weight Consideration.
Some performance limitations of conventional paper its application in many mechanical fields, for example, the easy moisture absorption of conventional paper, wet tenacity are especially low.Be easy to absorbing environmental water when the common paper direct contact water or when being exposed in the atmosphere, the result does not have wet tenacity basically.For many paper products, this wet tenacity that is exposed to moisture and is caused reduces can destroy their usability, thereby another character that makes paper can not be used for some field is the product that its absorption oil and fat are unsuitable for packing oil-containing or fat.
In order to enlarge the purposes of paper, always with other material to paper handle, lamination, coating or in conjunction with satisfying the needs of specific end-use to form impervious water shielding.Modally require paper to have the shielding purposes that requirement waterproof, protection against the tide, anti-fat, oil resistant, gasproof are arranged and every multilayer loading bag, wrapping paper and the food wrapper of flavor.
When combining with one or more shielding materials with special property, multiwall kraft can obtain cost/performance ratio equilibrated wrapping paper.Coating often is squeezed on the multiwall kraft matrix with single or multiple lift.Except the compound monofilm of being made up of the resin of two-layer or more multi-layered special property, coating and film also utilize got polymkeric substance that quantity increases day by day and polymer-modified, and the film of these structures can be made with extruding or bonding lamination or coextrusion.
Loading bag film often is called as freedom or carrier-less film.Yet they often seem as if carrier film are arranged in the bag of being produced, and promptly they engage by bonding or heat lamination.Up to now the highest plastic coating or the film of volume increase that is used for multilayer loading bag is polyethylene, and it can be produced the density of certain limit, different intensity, snappiness and fusing points.Main advantage factor has availability, low cost and it characteristic as the steam shielding, and this characteristic is to the modal shielding requirements of loading bag.
Laminated paper is a kind of common name, relate to one deck paper at least and be combined in arbitrary combination on folded or many stackers, plastic film, glassine paper, paper tinsel or other material, thereby the scope of laminated paper for example can be from changing to the kraft paper complex construction that is in turn laminated on polyethylene/paper tinsel/polyethylene by amylan agglutinating two Zhang Ping's plate kraft paper.
Paper tinsel/paper laminate is by binding agent or laminating agent, and the heat fusion or the polyethylene extruding that are generally wax are attached to kraft paper on the continuous metal paper tinsel plate.
Grease resistant paper is used as the shielding that contains fat or oil production together with glassine paper and vegetable parchment.Grease resistant paper utilizes the sulphite or the manufacturing of vitriol (ox-hide) paper pulp of special quilt " hydration ".Glassine paper is to make with the Steel Roll that is heated by steam by the plate of anti-fat is passed a series of alternative fibers under high pressure and high temperature.Except anti-fat, glassine paper also has the printing surface of good processibility, excellence, and can easily combine to satisfy special packing instructions with various films and paper tinsel.Because the wax layer material is softening more than 120 °F, so wax laminated glass paper is unsuitable for directly contacting awfully hot product in packaging operation.
In vegetable parchment, now replaced cotton fibre with vitriol or ox-hide wood pulp, use through the not gluing of bleaching and the thin layer paper that do not have other filler as body paper.The remarkable characteristic that vegetable parchment is used to pack purposes is its anti-fat height and wet tenacity height.Standard brand paper ability is the infiltration of the oil, fat, rosin etc. of any type almost, and keeps the intensity of high percentage ratio when wet.Because the low dry tenacity performance of its intrinsic, it is difficult to operation when overlay device.
Roll wrapper often is called as and is used to wrap up paper roll in order to avoid they absorb moisture and the rotating paper of whiteness again.The most frequently used material as the steam shielding in roll wrapper is for example polyethylene, polypropylene or a wax of petroleum-based products.These products have excellent steam shielding properties; Can use economically and be widely used in the industry.Roll wrapper is typically by making two-layer sheet lining is laminated together with wax or polyethylene.
Though plastic film and roll wrapper have good shielding properties, because shielding material (polyethylene, polypropylene or wax) pollutes the finished product and cause operational difficulty in screening and other paper making equipment, so they can not reclaim in the paper feed again.Therefore after use, must carefully remove roll wrapper and carry out landfill from the paper recovery system.Owing to can utilize reducing day by day of landfill place, so the surprising height of the expense of landfill.
A replacement scheme of landfill is to incinerate and the method for compost (composting), relates to the toxicity of atmospheric discharging and ash and contaminate environment is considered this point owing to incinerate, and compost is more widely used than incineration.Suppose that be had suitable carbon-nitrogen ratio by the material of compost promptly has 25 to 30 carbon to each nitrogen, then compost will obtain more and more people's acceptance.
Because landfill space reduces, it is too high to reclaim the cost that relates to again, so the recovery again of steam shielding wrapping paper has become a big problem.Therefore it is more compatible to make wrapping paper and typical paper reclaim technology again by change steam curtain coating or laminate layers.
By method of the present invention, provide the laminated lignin-base composition that is suitable for environmentally compatible.Said composition is water base, has satisfied the technical qualification of steam shielding and the performance requriements of wrapped product, compares with current industrial standard to have promoted recirculation.The organic solvent xylogen has hydrophobicity; It is the good candidate material of composition of the present invention.
An object of the present invention is to provide vapor barrier formulations.Said composition is made up of organic solvent xylogen, mica and latex.In one embodiment, this xylogen is included in the ammoniacal liquor dispersion, and in another embodiment, this xylogen is included in the polyacrylate dispersion.Composition of the present invention can be applied and be laminated to and makes a kind of laminated paper products that can recirculation on the paper substrate.
From being described in more detail of following preferred embodiment of giving, can more easily determine further feature of the present invention and aspect and other advantage.
The used xylogen of the present invention be by a kind of novelty based on organic solvent for example alcoholic acid chemistry delignification technology from the isolated a small amount of biological polymer of plant biological suspended substance.It is a kind of free-pouring nontoxic powder, is commonly referred to as the organic solvent xylogen.Often in alkaline solution and specific organic solvent, its general feature has hydrophobicity, high purity, melt flow and low-level carbohydrate and inorganic impurity for it.
Xylogen of the present invention can be made into a kind of water base vapor barrier formulations, and it includes, but are not limited to roll wrapper, roll end, clamping plate bag paper (skid wraps), multilayer bag, vapor barrier core, corrugation case and food product pack on the way.And then, in the time of on being laminated to suitable paper substrate, can prepare the finished product with environmentally compatible with xylogen of the present invention.These the finished product can perhaps be removed xylogen by extracting from laminated paper by pulling an oar and xylogen being stayed recirculation in the recyclable papers.
This xylogen can be made into a kind of water dispersion that uses ammoniacal liquor, and the method that obtains this xylogen dispersion generally is that to make the final pH value of dispersion be from about 8 to about 12 by xylogen and ammonia soln are mixed together.For the viscosity that obtains suiting can be milled down to ultimate size to the particle diameter of xylogen is from about 0.1 micron to 20 microns, preferably from about 0.5 micron to about 1.5 microns, this dispersion can be xylogen and produces from dispersion agent, and ammoniacal liquor is volatile positively charged ion, it can be driven away when drying stays the xylogen of dredging art in composition, perhaps, also can use other dispersion agent or dispersing auxiliary.
The xylogen dispersion of gained can for example styrene-butadiene rubber(SBR), vinylidene chloride divinyl, chloroprene rubber or any non-volatile nonmigratory latex that other can reduce the glass transformation temperature of xylogen mix mutually with latex like this, must the time can add for example mica of filler, the micaceous effect is to stablize coating dispersion and it is believed that it is a kind of steam shielding material.Proportioning with dry weight be calculated as about 40% to about 60% xylogen, the highest 33% mica and about 5% to about 35% latex, the xylogen composition of gained can be laminated on suitable paper substrate such as sheet lining or the kraft paper like this.
In another embodiment, xylogen can be made into and utilize for example aqueous based dispersions of polyacrylic ester of a kind of dispersion agent stable in acid system.The method that obtains this xylogen dispersion generally be by the water-soluble liquid-phase mixing of xylogen and this dispersion agent so that the final pH value of dispersion is that slight alkalinity is to neutrality.For obtaining suitable viscosity.Can be milled down to ultimate size to the particle diameter of xylogen is from about 0.5 micron to about 5 microns.
The polyacrylic ester xylogen dispersion of gained can for example polyvinyl acetate or any non-volatile non-migrating latex that other has the bonds well performance and can reduce the glass transformation temperature of xylogen mix mutually with latex like this.For example mica, micaceous effect are to stablize coating dispersion and it is believed that it is a kind of steam shielding toughener can to add a kind of filler in case of necessity.Proportioning is calculated as about 5% to about 40% xylogen, the highest 20% mica and about 40% to about 60% latex with dry weight.
Xylogen composition of the present invention can be used as the coating of suitable paper substrate such as kraft paper or sheet lining.Can use any suitable technology such as Meyer rod or preliminary roller spreader (forward rollcoater).Then White Board hypothallus be pressed onto glue spread for from 40 to about 60g/m
2To determine the laminating technology that will use as the type of the latex of binding agent in the composition.If thereby latex reduced the glass transformation temperature of xylogen but do not had cold bonding knot performance, coating just need carry out drying then by heating, pressurize and carry out lamination.If latex has good adhesive property, coating just need as above not planted the drying of same degree in the situation, and lamination does not need the heating or the pressurization of as much.The available WVTR value of laminating material of the present invention is to about 600g/m from about 4
2/ day.
Laminated paper of the present invention can be by for example sodium hydroxide, ammonium hydroxide or pH value are the recirculation of pulling an oar of from about 10 to about 12 high alkalinity carbonate with mineral alkali.Slurry mixes so that laminated paper is fragmented into a kind of alkaline lignin liquor of independent cellulose fiber peacekeeping under typical conditions of beating.This paper pulp filters on for example rotary filter or pressure filter so that lignin liquor is separated with the fibrefelt that is used to papermaking.Filtrate is acidificable be from about 4 to about 6 with the recycled wood quality to pH value, and perhaps, laminate product can be pulled an oar under neutrallty condition again xylogen is stayed on the fiber.Because such means cause more or less spot of recyclable papers, therefore resulting fiber is more suitable for being used in the internal layer of laminated paper product that can't see spot.On the contrary, the content of wax and poly paper even can not be as the filler in the internal layer be because their migrations or the surface that leaks into paper cause operating troubles in the drying zone of paper machine.Thereby now wax or polyethylene layer platen by landfill or burn.
Embodiment 1
To make pH value be 10 to be ready to the xylogen dispersion by mix 45% xylogen in ammonia soln.In order to reduce particle diameter, the xylogen dispersion flows through the horizontal shredder of being made by Premier MillCorporation that is called Supermill, and particle diameter is from 10% being milled down to below 1 micron 87% below 1 micron.
Embodiment 2
The xylogen dispersion of embodiment 1 is added in the coating composition shown in the table 1.
Table 1
| Component | Weight percent (%) |
| Xylogen | ?27.45 |
| Filler | ?14.10 |
| Latex | ?8.30 |
| Rheology modifier | ?0.15 |
| Water | ?50 |
The final Brookfield viscosity that records under 25 ℃ and 100rpm is about 2000cps.Final solids content is about 50%, and pH value is about 8.
Embodiment 3
To make pH value be 6 to 7 to be ready to the xylogen dispersion by mix 45% xylogen in polyacrylate solution.In order to reduce particle diameter, the xylogen dispersion is carried out as the processing among the embodiment 1.
Embodiment 4
The xylogen dispersion of embodiment 3 is added to make the composition shown in the table 2.
Table 2
| Component | Weight percent (%) |
| Xylogen | 20.30 |
| Filler | 8.70 |
| Latex | 28.71 |
| Dispersion agent | 0.29 |
| Water | 42.0 |
The final Brookfield viscosity of measuring under 25 ℃ and 100rpm is about 2500cps, and finally solids content is about 58%, and pH value is about 6.5.
Embodiment 5
At drum speed is that the composition of the following embodiment 2 of 30m/min is applied on the body paper so that reaching predetermined moisture is 5%, and the lamination glue spread is 44 to 54g/m
2Three kinds of different body paper have been coated with: 26 pounds of sheet linings, the thin layer coil paper body paper of 50 pounds of ox-hide bags and 60 pounds.The measuring result of WVTR shows, is 44.5g/m for glue spread under 25 ℃ and 50%RH
2The mean value of WVTR be 7.3g/m
2/ day, measurement is carried out on MOCONPermatran-W3/31.
Embodiment 6
At drum speed is that the composition of the following embodiment 4 of 400m/min is applied on 78 pounds of sheet lining body paper that to press glue spread be 40 to 48g/m to reach predetermined layer
2With humidity be 8 to 10%.It is 43.9g/m that the measuring result of WVTR shows under 40 ℃ and 100%RH for the amount of being coated with
2WVTR mean value be 483g/m
2/ day.Measurement is carried out on MOCONPermatran-W3/31.
Embodiment 7
Packed 7 rolled papers with the coating of the xylogen of embodiment 6, packed 7 with the wax wrapping paper and contrasted rolled papers (twice pack).Do not find differences at packaging station and curling station.Find xylogen packing volume for packing closely, it is high slightly that this results from the moisture content of roll wrapper.
Reel is divided into two groups.One group of 8 volume (4 volume paraffin paper+4 volume xylogen wrapping papers) seasoning under 25 ℃ and 56%RH, another group seasoning under 37 ℃ and 40%RH with simulation high temperature seasoning condition.Extract pattern from reel, 1/2 inch until 5/2 inch of the degree of depth at interval.32 days post analysis patterns of seasoning have or not any temperature and whiteness to change.
For pack with waxed wrapper or do not have significant whiteness and humidity to change difference with the reel that organic solvent xylogen composition is packed.As shown in table 3, the amplitude of variation is very little, thinks in the fluctuation range of overlay paper or measurement itself.
Table 3
| Whiteness (ISO) | Humidity (%) | |
| The wax wrapping paper | ||
| Initial | ????74.2 | ?????4.52 |
| At last (25 ℃, 56%RH) | ????74.3 | ?????4.65 |
| At last (37 ℃, 40%RH) | ????73.7 | ?????4.65 |
| The xylogen wrapping paper | ||
| Initial | ????74.1 | ?????4.41 |
| At last (25 ℃, 56%RH) | ????74.0 | ?????4.6 |
| At last (37 ℃, 40%RH) | ????73.9 | ?????4.6 |
Embodiment 8
In the present embodiment, by using 200HP hollander and water to pull an oar again down and reclaim the laminated paper of embodiment 6 again at pH value 75, denseness 4.5% condition with high-speed.
Da Jiang xylogen overlay paper contains large stretch of black xylogen coating again.This material with make the middle layer (the 2nd layer to the 5th layer) that is used for making 6 layers of chipboard product as the old newspaper of fiber with 50: 50 proportioning.This is that what to make with 6 kobayashi Ultra-Former under 130 inches side cuts (trim), 100m/min is 720g/m to produce basic weight
2The multilayer chipboard, its humidity is 5.5%, thickness is 500 microns, the quality of the quality of gained chipboard product of gained when only using old newspaper is the same good.There is not evidence to show that xylogen moves to the surface from internal layer.Do not observe warping phenomenon or other dimensional problem.
In a word, the xylogen overlay paper is proved to be and can pulls an oar again.If the xylogen spot mustn't occur in the recyclable papers, then can limit the use of in the field of for example chipboard containing getting the raw materials ready of xylogen, it can be added in the internal layer to have hidden visible xylogen spot here.
Can understand the present invention and many attached advantages thereof with above stated specification, obviously only otherwise break away from all its material advantages of essence of the present invention and category or sacrifice, can carry out various changes and change, foregoing certain material, technology and embodiment are preferred embodiment.
Claims (18)
1. suitable vapor barrier formulations that is laminated on the paper substrate comprises and calculates from about 40% to about 60% organic solvent xylogen with dry weight, maximum 33% mica and from about 5% to about 35% latex.
2. according to the composition of claim 1, wherein said xylogen is included in the ammoniacal liquor dispersion.
3. according to the composition of claim 2, wherein said xylogen particle diameter is from about 0.2 to about 20 microns.
4. suitable vapor barrier formulations that is laminated on the paper substrate comprises and calculates from about 5% to about 40% organic solvent xylogen with dry weight, maximum 33% mica and from about 5% to about 35% latex.
5. according to the composition of claim 4, wherein said xylogen is included in the polyacrylate dispersion.
6. according to the composition of claim 5, the particle diameter of a wherein said quality is from about 0.5 to about 5 microns.
7. one kind by paper substrate with contain the coat composed platen of recovery layer again of vapor barrier formulations, and vapor barrier formulations comprises with dry weight and calculates from about 40% to about 60% organic solvent xylogen, maximum 33% mica and from about 5% to about 35% latex.
8. according to the laminated paper of claim 7, wherein said xylogen is included in the ammoniacal liquor dispersion.
9. laminated paper according to Claim 8, wherein the particle diameter of said xylogen is from about 0.1 to about 20 microns.
10. one kind by paper substrate with contain the coat composed platen of recovery layer again of vapor barrier formulations, and vapor barrier formulations comprises with dry weight and calculates about 5% to about 40% organic solvent xylogen, maximum 33% mica and from about 5% to about 35% latex.
11. according to the laminated paper of claim 10, wherein said xylogen is included in the polyacrylate dispersion.
12. according to the laminated paper of claim 11, wherein the particle diameter of said xylogen is from about 0.5 to about 5 microns.
13. the manufacture method with steam shielding properties laminated paper, said method comprises the following steps:
In composition, mix and calculate from about 40% to about 60% organic solvent xylogen with dry weight, maximum 33% mica and from about 5% to about 35% latex,
Said composition be applied on the paper substrate with the preparation glue spread for from 40 to about 60g/m
2Coating, and
The said coating of lamination.
14. according to the method for claim 13, wherein said xylogen is included in the ammoniacal liquor dispersion.
15. according to the method for claim 14, wherein said xylogen particle diameter is from about 0.1 to about 20 microns.
16. the manufacture method with laminated paper of steam shielding properties, said method comprises the following steps:
In composition, mix with dry weight and calculate from about 5% to about 40% organic solvent xylogen element, maximum 33% mica and from about 5% to about 35% latex,
Said composition be applied on the paper substrate with the preparation glue spread for from about 40 to about 60g/m
2Coating, and
The said coating of lamination.
17. according to the method for claim 16, a wherein said quality is included in the polyacrylate dispersion.
18。According to the method for claim 17, wherein the particle diameter of said xylogen is from about 0.5 to about 5 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96121605A CN1184830A (en) | 1996-12-11 | 1996-12-11 | Lignin-base vapor barrier formulations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96121605A CN1184830A (en) | 1996-12-11 | 1996-12-11 | Lignin-base vapor barrier formulations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1184830A true CN1184830A (en) | 1998-06-17 |
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ID=5126952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96121605A Pending CN1184830A (en) | 1996-12-11 | 1996-12-11 | Lignin-base vapor barrier formulations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1184830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718995A (en) * | 2012-07-05 | 2012-10-10 | 张仲伦 | Industrial lignin reinforcing rubber and preparation method of industrial lignin reinforcing rubber |
-
1996
- 1996-12-11 CN CN96121605A patent/CN1184830A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718995A (en) * | 2012-07-05 | 2012-10-10 | 张仲伦 | Industrial lignin reinforcing rubber and preparation method of industrial lignin reinforcing rubber |
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