CN101050611A - Surface sizing agent for improving paper deflection and paperboard circular press stength - Google Patents
Surface sizing agent for improving paper deflection and paperboard circular press stength Download PDFInfo
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Abstract
The present invention related to a surface sizing agent for raising stiffness of paper and ring crush of board. It is a mixture made up by using (by wt %) 80-99.5% of water-soluble thermosetting resin adhesive and 0.5-20% of solidifying agent. Said invention also provides its application method.
Description
One, technical field:
The present invention relates to the technical field of Cypres, specifically relate to the Cypres of the ring crush intensity of a kind of deflection that is used to improve paper and cardboard.
Two, background technology:
Domestic packaging paper product develops rapidly, has promoted the continuous growth of domestic high-strength corrugated base paper and kraft paperboard demand.The future development trend of current China corrugated case industry be fluting medium to low quantitatively, high strength, lightweight direction develops.The consumption figure of domestic high-strength corrugated base paper is also very big, should greatly develop the high-strength corrugated base paper in native country, reduces import volume.
The reinforcing agent that is used for paper and cardboard at present mainly contains: starch based chemical assistant, polyacrylamide (PAM) class reinforcing agent, copolymer emulsion type reinforcing agent also have starch and acrylamide grafted copolymer etc.The starch based chemical assistant that is used for the enhancing of fluting medium and boxboard mainly contains anionic starch, cationic starch and spray starch; The polyacrylamide reinforcing agent has cationic polyacrylamide (CPAM); Paper grade (stock) cation emulsion type reinforcing agent has the cation copolymer of styrene, acrylate, acrylamide, quaternary ammonium salt emulsion polymerisation; These reinforcing agents are to be added in the paper pulp, can increase interfibrous bond strength, and the deflection and the ring crush intensity of paper and cardboard had some improvement, and generally are no more than 20～30%.In addition, spray starch also can improve the ring crush intensity of paper arc to a certain extent between ply of board, but the problem that also exists starch to run off.
Concerning fluting medium and boxboard, seek out higher ring crush intensity, surface strength and water repelling property, must adopt top sizing.More domestic in recent years producers also begin to improve with surface sizing starch the ring crush intensity of cardboard.The Cypres that is used to strengthen can roughly be divided into starch based Cypres and synthetic surface sizing agent two big classes.China's starch based Cypres commonly used is oxidized starch, phosphate ester starch at present, and cationic oxidation starch and hydroxypropul starch also begin to use as surface sizing starch now; The synthetic surface sizing agent mainly contains polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), fluorine propylene base system macromolecular compound; And being used of starch based Cypres and synthetic surface sizing agent.Above-mentioned Cypres is owing to be subjected to the restriction of the concentration and the viscosity of Cypres, and resin added can only reach 3～5g/m
2, up improve relatively difficulty of resin added again, more effective to surface strength, the printability that improves paper, be subjected to certain restriction for the effect that improves cardboard.What therefore, provide a kind of special use is very necessary to the deflection that improves paper and the very effective Cypres of ring crush intensity of cardboard.
Three, summary of the invention:
The object of the present invention is to provide the Cypres of the ring crush intensity of a kind of deflection that improves paper and cardboard, it can overcome in the existing Cypres shortcoming of ring crush intensity, surface strength and the water repelling property deficiency of the deflection of paper and cardboard after the applying glue.
To achieve these goals, technical scheme of the present invention is:
The Cypres of the ring crush intensity of a kind of deflection that is used to improve paper and cardboard, it is characterized in that: this Cypres is to be the mixture of the curing agent combination of 80～99.5% water miscible type thermosetting resin adhesive and 0.5-20% by percentage by weight, and this Cypres water is mixed with 1-60% concentration during use.This Cypres both can use separately, again can be composite with composite use of surface sizing starch and surface sizing starch, and the compound proportion of this Cypres and surface sizing starch is 99: 1～1: 99.Above-mentioned water miscible type thermosetting resin adhesive has one or more the mixture in Lauxite, phenolic resins, melmac or the epoxy resin.Above-mentioned Lauxite Cypres, specific curing agent have hydrochloric acid, sulfuric acid, boric acid, phosphoric acid, bisulfate, ammonium phosphate, ammonium chloride, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium formate, ammonium dihydrogen phosphate (ADP), tannic acid, chloroacetic acid, face phthalate anhydride, face phthalic acid, a kind of in acidic resins, oxalic acid or the oxamide.Above-mentioned phenolic resins Cypres, specific curing agent have a kind of in hydrochloric acid, phosphoric acid, sulfuric acid, p-methyl benzenesulfonic acid, phenolsulfonic acid, ammonium chloride, hexa or the paraformaldehyde.Above-mentioned melmac Cypres, specific curing agent have a kind of in hydrochloric acid, sulfuric acid, ammonium chloride or triethanolamine and the phthalic anhydride mixture.Above-mentioned epoxy resin surface sizing agent, specific curing agent has amine, anhydrides, polymer-type or resting form; Wherein amine curing agent has: ethylenediamine, diethylenetriamines, diethylenetriamine, four ethylidene triamines, the polyethylene triamine, diethyl amino propylamine, hexamethylene diamine, m-phenylene diamine (MPD), 4,4 '-diaminodiphenylmethane, 4,4 '-diamino-diphenyl sulfone, the β hydroxyethylethylene diamine, m-phenylene diamine (MPD) and expoxy propane phenyl ether condensation reaction thing, diethylenetriamine epoxy propane butyl ether condensation reaction thing, phenol formaldehyde (PF) hexamethylene diamine condensation reaction thing, phenol formaldehyde (PF) m-phenylene diamine (MPD) condensation reaction thing, phenol formaldehyde (PF) ethylenediamine condensation reaction thing, diethylenetriamine and acrylonitrile addition reaction, a kind of in phenol formaldehyde (PF) tetraethylene pentamine condensation reaction thing or the phenol formaldehyde (PF) diethylenetriamine condensation reaction thing; Latent curing agent has a kind of in the acrylonitrile of imidazoles, anhydrides, dicyandiamide, organic hydrazides (butanedioic acid hydrazides, adipic acid hydrazides, M-phthalic acid hydrazides), modification or the microcapsule-type curing agent; Organic acid anhydride class curing agent has: a kind of in maleic anhydride, phthalic anhydride, inner methylidyne tetrahydric phthalic anhydride, hexahydrophthalic anhydride, dodecyl maleic anhydride, chlordene inner methylidyne tetrahydric phthalic anhydride, poly-azelaic acid acid anhydride, pyromellitic dianhydride or the liquid tetrabydrophthalic anhydride; Polymer-type is that low molecule pa resin class curing agent has: a kind of in Versamid, linoleic acid two polyester and trien reactant, dimerization eleostearic acid and diethylenetriamines reactant, linoleic acid two polyester and diethylenetriamines reactant, linoleic acid two polyester and diethylenetriamine reactant, linoleic acid two polyester and tetren reactant, eleostearic acid methyl esters and trien reactant or own Inner acid amides and the diethylenetriamines reactant.The composite surface sizing starch of above-mentioned and Cypres has: heat or heat chemistry converted starch; the acid modified starch; oxidized starch, enzyme converted starch, acetylated starch; hydroxyalkyl (propyl group or ethyl) starch; the two converted starches of anionic, cationic starch, graft copolymerization starch; amphoteric starch, the mixture of one or more in octenyl succinate starch or the phosphate ester starch.
When using this Cypres, can select following three kinds of schemes:
(1), the surface sizing technique flow process is: the preparation of water-soluble thermosetting resin surface size-→ door roll-type size applicator applying glue or film transitional surface size applicator-→ cylinder dried-→ coil into paper.
(2), the surface sizing technique flow process is: water-soluble thermosetting resin and surface sizing starch be composite-→ gelatinization-→ door roll-type size applicator applying glue or film transitional surface size applicator-→ cylinder dried-→ coil into paper.
(3), the surface sizing starch aqueous solution-→ gelatinization-→ with water-soluble thermosetting resin composite-→ door roll-type size applicator applying glue or film transitional surface size applicator-→ cylinder dried-→ coil into paper.
This Cypres can use separately or with the composite use of surface sizing starch, the compound proportion of this Cypres and surface sizing starch is 99: 1～1: 99, to paper and paperboard surface applying glue, can increase substantially the ring crush intensity of paper and cardboard, significantly improve the surface strength and the water repelling property of paper and cardboard.Compare with Cypres, the viscosity of this Cypres is less, therefore can be with higher concentration applying glue, the top sizing of the also long-range traditional surface agent of spread, and along with the increase of sizing agent concentration, resin added constantly rises, and it is also obvious more that ring crush intensity strengthens amplitude, studies show that the ring crush intensity of fluting medium can increase by 169%.It is better than oxidized starch that this Cypres improves ring crush intensity, and identical resin added, this Cypres raising ring crush intensity are 2.5 times of oxidized starch.With this Cypres and the composite use of oxidized starch, find that this Cypres and oxidized starch have synergy, to the humidification of the ring crush intensity of cardboard greater than adding oxidized starch or water-soluble thermosetting resin separately, adopt compound scheme can improve the ring crush intensity of cardboard on the one hand, can reduce the cost of Cypres on the other hand, improve the competitiveness of product in market.
This Cypres also is applicable to the paper of some specific uses, produce the electro-photographic paper of filling out of height, improve the filer content of paper, the deflection of paper will inevitably descend, and adopt the applying glue of water miscible thermosetting resin Cypres, can make the deflection of electro-photographic paper reach quality requirement, the high amount of filler of paper, thereby reduced product cost.
Utilize the paper and the cardboard of Cypres applying glue provided by the invention, can promote the class of product on the one hand, when not changing product quality, can reduce the quantitative of product and reduce cost on the other hand.
The determination method GB/T2679.8-1995 of ring crush index is adopted in the detection of cardboard ring crush intensity.
Four, the specific embodiment:
Embodiment 1
The Cypres of the ring crush intensity of a kind of deflection that is used to improve paper and cardboard, it is to be the mixture that the hydrochloric acid of 80% Lauxite and 20% is combined into by percentage by weight, water is mixed with 10% concentration during use.
Embodiment 2
The Cypres of the ring crush intensity of a kind of deflection that is used to improve paper and cardboard, it is to be the mixture that the sulfuric acid of 90% phenolic resins and 10% is combined into by percentage by weight, water is mixed with 20% concentration during use.
Embodiment 3
A kind ofly be used to improve the deflection of paper and the Cypres of cardboard ring crush intensity, it is to be the mixture that the ammonium chloride of 95% melmac and 5% is combined into by percentage by weight, and water is mixed with 30% concentration during use.
Embodiment 4
A kind ofly be used to improve the deflection of paper and the Cypres of cardboard ring crush intensity, it is to be the mixture that 95% epoxy resin and 5% ethylenediamine are combined into by percentage by weight, and water is mixed with 40% concentration during use.
Embodiment 5
Take from the fluting medium of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 105.9g/m2, and the raw material of fluting medium is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Fluting medium is cut into 400mm * 150mm pattern, adopts self-control door roll-type top sizing device to carry out Cypres, and applying glue is after 105 ℃ of heating of baking oven aeration-drying gets fluting medium applying glue product.Be detected as the ring crush intensity of paper, detection mode adopts the determination method GB/T2679.8-1995 of ring crush index.Cypres adopts the mixture of phenolic resins and ammonium chloride, and prescription is 97% phenolic resins and 3% ammonium chloride.This Cypres water is mixed with 10% concentration during use.This experiment does not have that the ring crush intensity of fluting medium is 6.37N.m/g before the applying glue, resin added 10.8g/m
2The ring crush intensity of fluting medium is 9.64N.m/g, and the ring crush intensity of fluting medium has increased by 51.3%.
Embodiment 6
Take from the boxboard of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 125.9g/m2, and the raw material of boxboard is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Boxboard is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.Cypres adopts the mixture of melmac and hydrochloric acid, and prescription is 99% phenolic resins and 1% hydrochloric acid.This Cypres water is mixed with 30% concentration during use.This experiment does not have that the ring crush intensity of boxboard is 8.21N.m/g before the applying glue, resin added 20.3g/m
2The ring crush intensity of boxboard is 14.14N.m/g, and the ring crush intensity of boxboard has increased by 72.2%.
Embodiment 7
Take from the fluting medium of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 105.9g/m2, and the raw material of fluting medium is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Fluting medium is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.Cypres adopts the mixture of epoxy resin and ethylenediamine, and prescription is 95% epoxy resin and 5% ethylenediamine.This Cypres water is mixed with 30% concentration during use.This experiment does not have that the ring crush intensity of fluting medium is 6.37N.m/g before the applying glue, resin added 24.1g/m
2The ring crush intensity of boxboard is 13.44N.m/g, and the ring crush intensity of boxboard has increased by 111%.
Embodiment 8
Take from the fluting medium of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 105g/m2, and the raw material of fluting medium is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Fluting medium is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.Table 1 is the ring crush intensity enhancing table of the different resin addeds of water miscible thermosetting resin Cypres, from table 1, draw, the resin added of 10.5g/m2, the ring crush intensity of fluting medium can improve 94%, 31.5g/m2 resin added, the ring crush intensity of fluting medium has increased by 167%.
The different resin addeds of the water miscible thermosetting resin Cypres of table 1 fluting medium strengthen table
| Sizing agent concentration, % | 0 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 20 | 25 | 33 | 45 |
| Resin added, g/m2 | 0 | 2.1 | 4.2 | 6.3 | 8.4 | 10.5 | 15.5 | 21 | 26.2 | 31.5 | 42 |
| Ring crush index, N*m/g | 5.2 | 6.3 | 7.2 | 8.7 | 9.4 | 10.1 | 11.3 | 12.7 | 13 | 13.9 | 14 |
| Strengthen percentage, % | 0 | 21 | 38 | 67 | 81 | 94 | 117 | 144 | 150 | 167 | 169 |
Embodiment 9
Take from the fluting medium of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 105g/m2, and the raw material of fluting medium is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Fluting medium is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.Oxidized starch and water miscible thermosetting resin Cypres are mixed with 10% surface size concentration respectively, table 2 is that the ring crush intensity of water-soluble thermosetting resin and the identical resin added of oxidized starch Cypres strengthens the table of comparisons, from table 2, see, 8.4g/m2 resin added, adopt its ring crush intensity of fluting medium of oxidized starch top sizing to improve 32.7%, identical resin added, adopt its ring crush intensity of fluting medium of water-soluble thermosetting resin top sizing but to increase by 81%, the enhancing amplitude is 2.47 times of employing oxidized starch top sizing.
Water miscible thermosetting resin of table 2 fluting medium and oxidized starch top sizing strengthen the table of comparisons
| Ring crush index, N*m/g | Strengthen percentage, % | |
| Fluting medium | 5.2 | 0 |
| Oxidized starch top sizing (8.4g/m2) | 6.9 | 32.7 |
| Thermosetting resin top sizing (8.4g/m2) | 9.4 | 81 |
Embodiment 10
Take from the boxboard of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 125g/m2, and raw material is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Boxboard is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.The water-soluble thermosetting resin Cypres is mixed with different surface size concentration on demand.Table 3 is the different resin added enhancing of the water miscible thermosetting resin Cypres of boxboard tables, from table, see, adopt 10% water miscible thermosetting resin surface size concentration applying glue, resin added 7.5g/m2, the ring crush intensity of boxboard improves 50%, adopt the water miscible thermosetting resin Cypres applying glue of 26% concentration, resin added 21.5g/m2, the ring crush intensity of boxboard has increased by 110%.
The different resin addeds of the water miscible thermosetting resin Cypres of table 3 boxboard strengthen table
| Sizing agent concentration, % | 0 | 5 | 10 | 15 | 20 | 26 |
| Resin added, g/m2 | 0 | 3.3 | 7.5 | 12.0 | 15.0 | 21.5 |
| Ring crush index, N*m/g | 8.7 | 9.6 | 13 | 13.9 | 14.6 | 18.2 |
| Strengthen percentage, % | 0 | 10.3 | 50.0 | 60.0 | 67.8 | 110 |
Embodiment 11
Take from the boxboard of boxboard paper plant of Ma'an Mountain eagle group, grammes per square metre is 125g/m2, and raw material is reduced remaining leftover pieces etc. for the waste carton of purchase, carton factory, uses common long mesh paper making machine papermaking.Boxboard is cut into 400mm * 150mm pattern, and the method for top sizing and the detection method of sample are with embodiment 1.It is composite that water-soluble thermosetting resin Cypres and oxidized starch are undertaken by different proportionings, is mixed with 10% surface size concentration during top sizing.Table 4 is that the composite top sizing of water miscible thermosetting resin of boxboard and oxidized starch strengthens tables of data, and as can be seen from the table, water-soluble thermosetting Cypres and oxidized starch are composite can to produce synergistic enhancing effect, obtains better sizing efficiency.Resin added all is controlled at 10.5g/m2, adopt the boxboard of oxidized starch top sizing, ring crush intensity improves 36%, and it is composite to adopt water-soluble thermosetting resin Cypres and oxidized starch respectively to account for 50% ratio, ring crush intensity increasing degree maximum has reached 86.7%.And use the water-soluble thermosetting resin Cypres to carry out top sizing separately, and identical resin added, the ring crush intensity of boxboard has only increased by 68%.
The composite top sizing of water miscible thermosetting resin of table 4 boxboard and oxidized starch strengthens table
| OS accounts for percentage, % | Body paper | 100 | 80 | 75 | 67 | 50 | 33 | 25 | 20 |
| Ring crush index, N*m/g | 6.0 | 8.2 | 9.2 | 9.8 | 10.5 | 11.2 | 10.7 | 10.5 | 10.1 |
| Strengthen percentage, % | 0 | 36.0 | 53.3 | 63.3 | 75 | 86.7 | 78.3 | 75 | 68.3 |
Annotate: OS is that oxidized starch Oxide Starch writes a Chinese character in simplified form
Embodiment 12
For the paper plant of the production electro-photographic paper of commodity in use slurry, door roll-type top sizing or film applying glue by the paper machine add the applying glue of water miscible thermosetting resin Cypres, and resin added is 1.5 ~ 3g/m2.Deflection is measured and is adopted the paper sheet stiffness analyzer, paper is cut into the wide paper slip of 20cm * 1cm, block with clamp, slowly to front slide, when running into paper sheet stiffness instrument slope, the crooked 45 degree paper of paper slip stop to slide, reading clamp on scale is reading to the distance of paper tail, deducts reading with 20cm and is the paper sheet stiffness value, and unit is cm.According to GB/T2679.15-1997, surface strength utilize IGT gigging speed instrument and in sticking printing ink measure, according to standard GB 12911-91, carry out the mensuration of paper KN ink absorption.Table 5 is that the enhancing of electro-photographic paper deflection and surface strength, ink absorption change.As seen from Table 5, Lauxite strengthens more effective than the oxidized starch to the deflection of electro-photographic paper, the composite deflection enhancing to electro-photographic paper of Lauxite and oxidized starch is better than the applying glue of independent use Lauxite again, adopt Lauxite and oxidized starch composite to the electro-photographic paper applying glue, 2.7g/m2 the resin added deflection improved 33%, significantly improved the deflection of electro-photographic paper.Adopt the independent applying glue of Lauxite or with the composite applying glue of oxidized starch, can improve the surface strength of electro-photographic paper, the composite applying glue of Lauxite and oxidized starch, the surface strength of electro-photographic paper has improved 50%.Adopt Lauxite to the electro-photographic paper top sizing, little to the KN ink absorption influence of electro-photographic paper, be better than the KN ink absorption of oxidized starch to the electro-photographic paper applying glue.After the deflection of Lauxite electro-photographic paper improved, it not only can reduce the consumption of other Cypres, thereby improved paper machine speed, can also improve at least 4% filer content, reduced product cost.
Deflection enhancing of table 5 electro-photographic paper and surface strength, ink absorption change
| Applying glue concentration, % | Body paper | OS(5％) | OS(10％) | UF(5％) | UF(10％) | OS+UF(5％) | OS+UF (10％) |
| Quantitative after the applying glue, g/m2 | 72.8 | 73.9 | 74.2 | 74.3 | 74.6 | 74.5 | 75.5 |
| Surface strength m/s | 1.59 | 2.36 | 2.54 | 2.18 | 2.00 | 2.28 | 2.39 |
| KN absorption of inks value, % | 60.48 | 47.85 | 43.44 | 57.99 | 57.63 | 55.4 | 52.6 |
| Paper sheet stiffness, cm | 15.1 | 16.5 | 16.8 | 17.5 | 17.8 | 18.9 | 20.0 |
(annotate: oxidized starch Oxide Starch, be called for short OS; Lauxite is called for short UF)
Claims (11)
1. one kind is used to improve the deflection of paper and the Cypres of cardboard ring crush intensity, it is characterized in that: this Cypres is to be the mixture of the curing agent combination of 80～99.5% water miscible type thermosetting resin adhesive and 0.5-20% by percentage by weight, and this Cypres water is mixed with 1-60% concentration during use.
2. Cypres according to claim 1 is characterized in that this Cypres both can use separately, also can with the composite use of surface sizing starch, the compound proportion of this Cypres and surface sizing starch is 99: 1～1: 99.
3. Cypres according to claim 1 is characterized in that: described water miscible type thermosetting resin adhesive has one or more the mixture in Lauxite, phenolic resins, melmac or the epoxy resin.
4. Cypres according to claim 3, it is characterized in that described Lauxite Cypres, specific curing agent has hydrochloric acid, sulfuric acid, boric acid, phosphoric acid, bisulfate, ammonium phosphate, ammonium chloride, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium formate, ammonium dihydrogen phosphate (ADP), tannic acid, chloroacetic acid, faces phthalate anhydride, faces phthalic acid, a kind of in acidic resins, oxalic acid or the oxamide.
5. Cypres according to claim 3, it is characterized in that described phenolic resins Cypres, specific curing agent has a kind of in hydrochloric acid, phosphoric acid, sulfuric acid, p-methyl benzenesulfonic acid, phenolsulfonic acid, ammonium chloride, hexa or the paraformaldehyde.
6. Cypres according to claim 3 is characterized in that described melmac Cypres, and specific curing agent has a kind of in hydrochloric acid, sulfuric acid, ammonium chloride or triethanolamine and the phthalic anhydride mixture.
7. Cypres according to claim 3 is characterized in that described epoxy resin surface sizing agent, and specific curing agent has a kind of in amine, anhydrides, polymer-type, the resting form.
8. Cypres according to claim 7, it is characterized in that described amine curing agent has: ethylenediamine, diethylenetriamines, diethylenetriamine, four ethylidene triamines, the polyethylene triamine, diethyl amino propylamine, hexamethylene diamine, m-phenylene diamine (MPD), 4,4 '-diaminodiphenylmethane, 4,4 '-diamino-diphenyl sulfone, the β hydroxyethylethylene diamine, m-phenylene diamine (MPD) and expoxy propane phenyl ether condensation reaction thing, diethylenetriamine epoxy propane butyl ether condensation reaction thing, phenol formaldehyde (PF) is diamines condensation reaction thing, phenol formaldehyde (PF) m-phenylene diamine (MPD) condensation reaction thing, phenol formaldehyde (PF) ethylenediamine condensation reaction thing, diethylenetriamine and acrylonitrile addition reaction, a kind of in phenol formaldehyde (PF) tetraethylene pentamine condensation reaction thing or the phenol formaldehyde (PF) diethylenetriamine condensation reaction thing.
9. Cypres according to claim 7 is characterized in that described latent curing agent has a kind of in the acrylonitrile of imidazoles, anhydrides, dicyandiamide, organic hydrazides (butanedioic acid hydrazides, adipic acid hydrazides, M-phthalic acid hydrazides), modification or the microcapsule-type curing agent.
10. Cypres according to claim 7 is characterized in that described polymer-type is that low molecule pa resin class curing agent has: Versamid, linoleic acid two polyester and trien reactant, dimerization eleostearic acid and diethylenetriamines reactant, linoleic acid two polyester and diethylenetriamines reactant, linoleic acid two polyester and diethylenetriamine reactant, linoleic acid two polyester and tetren reactant, eleostearic acid methyl esters and trien reactant or caprolactam and diethylenetriamines reaction species a kind of.
11. Cypres according to claim 2; it is characterized in that described surface sizing starch has: heat or heat chemistry converted starch, sour modified starch, oxidized starch; enzyme converted starch; acetylated starch, hydroxyalkyl (propyl group or ethyl) starch, the two converted starches of anionic; cationic starch; graft copolymerization starch, amphoteric starch, the mixture of one or more in octenyl succinate starch or the phosphate ester starch.
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| US6375788B1 (en) * | 1996-07-16 | 2002-04-23 | Premark Rwp Holdings, Inc. | Method of coating melamine resin on laminating paper |
| CN1632220A (en) * | 2004-12-29 | 2005-06-29 | 浙江东经包装有限公司 | Process for online reinforcing corrugated raw paper in corrugated paperboard production |
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