Summary of the invention:
Goal of the invention of the present invention, be that the performance indications that exist at the present hanging raw stock described in the background technology are desirable not to the utmost, cost is higher, the technological deficiency that industrial pollution is bigger, improve a kind of high-performance wallpaper base paper pulp and used the technology that this paper pulp carries out hanging raw stock production, adopt the present invention can significantly reduce the bubble point that hanging raw stock produces in PVC blade coating process, improve the bond strength and the stability of paper in green deformation of PVC coating and paper, to overcome the prior art deficiency, greatly reduce the production cost and the industrial pollution of hanging raw stock simultaneously.
For achieving the above object, the technical solution used in the present invention is:
A kind of high-performance wallpaper base paper pulp is made of slurry and auxiliary material, and described slurry is constituted by needle bleached wood pulp, broad-leaved bleached wood pulp, needle bleached chemical thermomechanical pulp; Described auxiliary material is constituted by starch, filler, internal sizing agent, Cypres, wet strength agent, retention agent in the slurry.
Further, in the described slurry, by percentage to the quality, the proportioning of various components in described hanging raw stock paper pulp is: needle bleached wood pulp 20%-25%; Broad-leaved bleached wood pulp 10%-15%; Needle bleached chemical thermomechanical pulp 40%-80%.
Further, in the described auxiliary material, described Cypres comprises Cypres A and Cypres B; Described retention agent comprises retention agent C and retention agent D, and by percentage to the quality, the proportioning of various components in described hanging raw stock paper pulp is: starch 0.5%-2% in the slurry; Filler 20%-25%; Internal sizing agent 1%-4%; Cypres A2.5%-3.0%; Cypres B0.2%-0.4%; Wet strength agent 2.5%-3.0%; Retention agent C is 30-100ppm; Retention agent D is 0.15%-0.25%.
Further, in the described slurry, the freedom of its needle bleached chemical thermomechanical pulp is 150-350CSF.
Further, in the described auxiliary material, affiliated internal sizing agent is AKD, and described filler is a calcium carbonate.
Further, in the described auxiliary material, stating Cypres A is oxidized starch; Described Cypres B is CMC.
As preferably, in the described auxiliary material, starch is cationic starch in the described slurry, and described wet strength agent is PAE, and described retention agent C is PAM, and described retention agent D is a Ludox.
Use a kind of high-performance wallpaper base paper pulp of the present invention and carry out the technology that hanging raw stock is produced, its technological process is:
A, needle bleached wood pulp, broad-leaved bleached wood pulp, needle bleached chemical thermomechanical pulp are mixed with slurry by described wet end furnish;
B, will starch in starch, filler, internal sizing agent, Cypres A, Cypres B, wet strength agent, retention agent C and retention agent D be formulated as auxiliary material according to described ratio of adjuvant;
C, described slurry and auxiliary material mixed after, constitute described hanging raw stock paper pulp, described body paper paper pulp is added entry, and to be modulated into online concentration be the online slurry of 0.6-0.9%, through fourdrinier wire dehydration, press dewatering, oven dry,
Further, the beating degree of described needle bleached wood pulp, broad-leaved bleached wood pulp is 20-35 ° of SR; The beating degree of described needle bleached chemical thermomechanical pulp is 40-60 ° of SR.
Among the present invention, the implication of general word is in the every profession and trade:
Bleached chemical thermomechanical pulp: i.e. BCTMP: it is with gentle chemicals dipping, through correct grinding, a kind of high yield wood pulp after the bleaching.The needle pulp brightness can reach 80%, broad-leaved pulp brightness about 85%.
BCTMP has following advantage: slurry yield height, lower production cost, environmental pollution be little, become paper to have higher bulk, the advantage of opacity and deflection.
PAE: wet strength agent for papermaking a kind of, belong to water-soluble, CATION, thermosetting resin, be another wet strength agent principal item behind present normally used Lauxite, melmac and polyamine.This product is applicable to that various requirement has the paper of wet strength performance, as: decorating base paper, napkin paper, asbestos base paper, filter paper, tea bag paper, titanium white paper, wallpaper, map paper, chart paper, art paper, medical and health paper, corrugated paper, refrigeration package case paper, warm nursery paper, various fruit paper bag, carnivorous vegetables paper, liquid food packing with wet pretend usefulness special with paper etc. of paper and various needs.
PAM: i.e. polyacrylamide, effect is the quality that can improve paper, improves the de-watering of slurries performance, improves the retention of fiber fines and filler, reduces raw-material consumption and to the pollution of environment etc.The effect of using in papermaking depends on the activity of its mean molecule quantity, ionic nature, ionic strength and other copolymer.Nonionic PAM is mainly used in the filter that improves paper pulp, increases dried paper intensity, improves the retention of fiber and filler; Anionic copolymer is mainly as wet reinforcing agent of doing of paper and presence agent; Cationic copolymer is mainly used in paper waste and handles and filtrating aid function, for the retention that improves filler effect is preferably arranged also in addition.In addition, PAM also is applied to paper waste processing and fiber recovery.
CMC: i.e. sodium carboxymethylcellulose, it is a kind of water-soluble cellulose ether, great majority aqueous solution preparation viscosity commonly used is changed between the 5000cP at 5cP, and the simplification molecular formula of CMC is as follows: Cell-O-CH2-COONa CMC is reacted to each other by chloroacetic acid and alkali cellulose and gets.Alkali cellulose itself is produced by cellulose and NaOH reaction.The step of alkali cellulose is necessary for the reaction of simplifying between etherifying agent and the cellulose chain.The substitution value (DS) and the degree of polymerization (DP) are the typical index of each grade NaCMC.CMC can make paper smooth agent, sizing agent in paper industry.Add 0.1%~0.3% CMC and can make paper strengthen tension stress 40%~50% in paper pulp, resistance to compression degree of breaking increases by 50%, 4~5 times of rubbing property increases.
Beating degree and freedom: the mensuration to Pulp Drainage Properties has the whole bag of tricks, wherein obtains than extensive use with freedom and beating degree.North america and Japanese multiselect Canadian Standard Freeness, degree Schopper-Riegler then is accustomed to using by Europe and China, and freedom and beating degree are different just measures difference on the method for expressing.Every beating degree is bigger, and the freedom of paper stock is just little, and vice versa.In general, the freedom big paper stock of healing, drainage rate are faster.Used measuring instrument of Canadian Standard Freeness and degree Schopper-Riegler instrument are approximate, and freedom and beating degree can convert each other, and its conversion table is as follows:
The conversion table of Canadian Standard Freeness and degree Schopper-Riegler
Canadian Standard Freeness degree Schopper-Riegler Canadian Standard Freeness degree Schopper-Riegler
(ml) (°SR) (ml) (°SR)
25 90.0 425 30.0
50 80.0 450 28.5
75 73.2 475 26.7
100 68.0 500 25.3
125 63.2 525 23.7
150 59.0 550 22.5
175 54.8 575 21.0
200 51.5 600 20.0
225 48.3 625 18.6
250 45.4 650 17.5
275 43.0 675 16.5
300 40.3 700 15.5
325 38.0 725 14.5
350 36.0 750 13.5
375 34.0 775 12.5
400 32.0 800 11.5
Beneficial effect of the present invention is:
1, adopt 70% change machine slurry on the wet end furnish. after changing raw material mix,, given full play to the slurry characteristics of change machine slurry because change machine slurry ratio height has been created condition for raisingization machine beating degree.The greatest improvement part of its product is that the binding ability of product and PVC coating improves, and finished product wallpaper surface smoothing, exquisiteness have solved the PVC hanging raw stock and added in coating and produce layering and bubble point problem man-hour, have improved properties of product.
2, traditional handicraft will be through high temperature disappear latent, washing, making beating etc. to the processing of change machine slurry, and technical process is loaded down with trivial details, consumes a large amount of steam.And the raising machine that new technology adopts slurry beating degree guarantees pulp quality, has both improved refining pulp quality, has reduced the slurry processing cost again.
3, the production of traditional hanging raw stock is mainly carried out applying glue with rosin, plain boiled water is easy to generate a large amount of foams in the production process, sizability is also unstable, production process operation and constant product quality are impacted, owing to be under acidity, to manufacture paper with pulp, become the easy brightness reversion of paper, because the particularity of slurry slurrying of change machine and bleaching process, slurry contains a large amount of anionic trashes, though can add PAE in process of production as the anionic trash catcher, but the rosin ester micelle still can interact with anionic trash and PAE and generate condensation product, and sizing efficiency is descended.New technology adopts the AKD neutral sizing, and uses calcium carbonate instead and add and fill out, and it is fine and smooth to make into the paper surface, becomes paper thickness to increase, and has overcome the shortcoming that becomes the easy brightness reversion of paper.
4, traditional hanging raw stock product generally can only be starched by adapted 50% change machine, and new technology machine slurry ratio brings up to 70%, and production cost of products is descended, and has increased the economic benefit of product.And reduced the pollution of slurrying, saved timber resources.
The performance indications that the present invention is directed to the present hanging raw stock existence described in the background technology are desirable not to the utmost, cost is higher, the technological deficiency that industrial pollution is bigger, a kind of high-performance wallpaper base paper pulp is provided and has used the technology that this paper pulp carries out hanging raw stock production, adopt the present invention can significantly reduce the bubble point that hanging raw stock produces in PVC blade coating process, improve the bond strength and the stability of paper in green deformation of PVC coating and paper, to overcome the prior art deficiency, greatly reduce the production cost and the industrial pollution of hanging raw stock simultaneously, and manufacturing technique of the present invention is simple, low cost of manufacture.The hanging raw stock of using the present invention's production is done, wet strength is high, and DIMENSIONAL STABILITY is good, and bulk is good, and the opacity height is difficult for brightness reversion.Slurry therewith is mainly high yield machine slurry, saves the forest reserves, and pollutional load is low, and is high for domestic present paper industry cost, and forest resourceies scarcity and the serious present situation of industrial pollution caused by paper manufacturing have dissemination preferably.
The specific embodiment:
A kind of high-performance wallpaper base paper pulp is made of slurry and auxiliary material, and described slurry is constituted by needle bleached wood pulp, broad-leaved bleached wood pulp, needle bleached chemical thermomechanical pulp; Described auxiliary material is constituted by starch, filler, internal sizing agent, Cypres A, Cypres B, wet strength agent, retention agent C and retention agent D in the slurry.In the described slurry, by percentage to the quality, the proportioning of various components in described hanging raw stock paper pulp is: needle bleached wood pulp 20%-25%; Broad-leaved bleached wood pulp 10%-15%; Needle bleached chemical thermomechanical pulp 40%-80%.In the described auxiliary material, by percentage to the quality, the proportioning of various components in described hanging raw stock paper pulp is: starch 0.5%-2% in the slurry; Filler 20%-25%; Internal sizing agent 1%-4%; Cypres A2.5%-3.0%; Cypres B0.2%-0.4%; Wet strength agent 2.5%-3.0%; Retention agent D0.15%-0.25%.In the described slurry, the freedom of its needle BCTMP wood pulp is 150-350CSF.In the described auxiliary material, affiliated internal sizing agent is AKD, and described filler is a calcium carbonate.In the described auxiliary material, stating Cypres A is oxidized starch; Described Cypres B is CMC.In the described auxiliary material, starch is cationic starch in the described slurry, and described wet strength agent is PAE, and described retention agent C is PAM, and described retention agent D is a Ludox.
Use a kind of high-performance wallpaper base paper pulp of the present invention and carry out the technology that hanging raw stock is produced, its technological process is:
A, needle bleached wood pulp, broad-leaved bleached wood pulp, needle bleached chemical thermomechanical pulp are mixed with slurry by described wet end furnish;
B, will starch in starch, filler, internal sizing agent, Cypres A, Cypres B, wet strength agent, retention agent C and retention agent D be formulated as auxiliary material according to described ratio of adjuvant;
C, described slurry and auxiliary material mixed after, constitute described hanging raw stock paper pulp, described body paper paper pulp is added entry, and to be modulated into online concentration be the online slurry of 0.6-0.9%, through fourdrinier wire dehydration, press dewatering, oven dry,
In the present invention, the beating degree of described needle bleached wood pulp, broad-leaved bleached wood pulp is 20-35 ° of SR; The beating degree of described needle BCTMP wood pulp is 40-60 ° of SR.
What must note is, the specific embodiment only is to of the present invention further specifying and non-limiting, and any employing the present invention spirit and only structure of the present invention is made simple transformation is still in protection scope of the present invention.