CN104480777A - Wallpaper base paper and production method thereof - Google Patents
Wallpaper base paper and production method thereof Download PDFInfo
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- CN104480777A CN104480777A CN201410640509.2A CN201410640509A CN104480777A CN 104480777 A CN104480777 A CN 104480777A CN 201410640509 A CN201410640509 A CN 201410640509A CN 104480777 A CN104480777 A CN 104480777A
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Abstract
The invention relates to the papermaking field, and concretely relates to a wallpaper base paper and a production method thereof. The wallpaper base paper is obtained through papermaking a pulp and auxiliary materials, wherein the pulp comprises 0-10 parts of a bleached chemical softwood pulp, 40-60 parts of a bleached chemical hardwood pulp, 30-60 parts of a bleached chemical thermomechanical pulp and 0-5 parts of secondary fiber; and the auxiliary materials comprise 15-25 parts of a filler, 2.0-3.5 parts of a wet strength agent, 0.5-0.7 parts of carboxymethyl cellulose, 0.8-1.2 parts of , 1.0-2.5 parts of internal starch, 1.0-2.5 parts of an internal sizing agent, a retention aid and a water filtering aid. The selection of the high-bulk bleached chemical thermomechanical pulp, the cooperative use of parts of the secondary fiber and the combined use of the wet strength agent and the carboxymethyl cellulose maximally reduce the production cost, and guarantee the extremely food strength, good dimension stability and low wet deformation rate of the base paper.
Description
Technical field
The present invention relates to field of papermaking, be specifically related to a kind of hanging raw stock and production method thereof.
Background technology
It is various that wallpaper has color, and pattern enriches, the feature that other house decorative material multiple such as luxurious style, safety and environmental protection, easy construction, affordable is incomparable, therefore the developed countries and regions more in the whole world obtains the universal of certain degree.Wallpaper kind is a lot, usually body paper is produced with bleached wood pulp, again with resin, plastics for being bonded into film, and add filler, pigment and other auxiliary material and make thermoplastic coating, then complicated manufacture craft is adopted to be combined with body paper, art decorations such as then embossing, stamp or foaming and making.Due to the complexity of back segment processing, determining hanging raw stock needs quite strict Con trolling index.Wherein mainly comprise: basic weight, thickness, tensile strength, wet anti-tensile retention rate, smoothness, whiteness, opacity, water imbibition and green deformation rate.
Hanging raw stock basic weight common on the market controls at 100g/m at present
2near, green deformation rate < 1.5%.Traditional production technology generally adopts the bleached chemical thermomechanical pulp of 40 ~ 50% and the bleached kraft pulp of part, through defibrination process to suitable freedom, add wet strength agent, dry strength agent, sizing agent, filler, be shaped through paper machine, more namely obtain hanging raw stock through top sizing and press polish process.Such as, find through retrieval, Authorization Notice No. is the patent of invention of 100585073, discloses a kind of hanging raw stock, its body paper paper pulp is made up of slurry and auxiliary material, and described slurry is combined formed by needle bleached wood pulp, broad-leaved bleached wood pulp, needle bleached chemical thermomechanical pulp; Described auxiliary material by starch interior starch, filler, internal sizing agent, Cypres, wet strength agent, retention agent combine form.
There is following defect in above-mentioned hanging raw stock: the thermomechanical pulp first but owing to adding more amount, can cause body paper insufficient strength, affects back segment processing; Secondly adding due to wet strength agent, cause the electric charge of paper machine system disorderly, cause ash content retention rate seriously to reduce, affect production efficiency; Reuse the composite use of different wood pulp, cause green deformation rate to be not easy to control.
Summary of the invention
In order to overcome the various defects existed in prior art, the first object of the present invention is to provide a kind of hanging raw stock, and the second object of the present invention is the production method providing a kind of hanging raw stock.
In order to reach the first object of the present invention, the technical solution used in the present invention is as follows: described slurry comprises by parts by mass: the bleached chemical softwood pulp of 0-10 part, the bleached chemical hardwood pulp of 40 ~ 60 parts, the secondary stock of the bleached chemical thermomechanical pulp of 30 ~ 60 parts and 0 ~ 5 part
Described auxiliary material comprises filler 15 ~ 25 parts, wet strength agent 2.0 ~ 3.5 parts, carboxymethyl cellulose 0.5 ~ 0.7 part, starch 0.8 ~ 1.2 part in slurry, internal sizing agent 1.0 ~ 2.5 parts, retains auxiliary agent, drainage auxiliary agent, retain auxiliary agent and be 50 ~ 400ppm relative to the addition of ton paper, drainage auxiliary agent is 2000 ~ 6000ppm relative to the addition of ton paper.
Wherein, the effect adding bleached chemical softwood pulp is to ensure paper strength, thus makes paper machine operation smooth; Its seeds generally select Southern Pine, north pine, dragon spruce or Oak Tree, and one or more compounds also can; Beating degree selects Canadian freeness to be 350 ~ 550ml, preferred Canadian freeness 400 ~ 500ml.
Wherein, bleached chemical hardwood pulp to the various performance of intensity between bleached chemical softwood pulp and bleached chemical thermomechanical pulp, therefore it can under the prerequisite ensureing paper properties production control cost; Its seeds generally select white poplar, Eucalyptus, Acacia or maple etc., and one or more compounds also can; Beating degree selects Canadian freeness to be 350 ~ 550ml, preferred Canadian freeness 400 ~ 500ml.
Wherein, bleached chemical thermomechanical pulp has good dimensional stability, and its bulk that paper can be provided excellent, the bulk of paper and green deformation rate can be made after adding to control in certain limit.
In order to make hanging raw stock have higher bulk and higher intensity, the bleached chemical thermomechanical pulp selected of the present invention is the mechanical pulp of high bulky, and bulk is 3.0cm
3/ more than g.
Add secondary stock and both can save cost declining, also can to a certain degree suppress paper green deformation simultaneously; Dry, the wet broke of preferred body paper.
The present invention, by the adjustment to slurry and auxiliary material composition and content, not only makes hanging raw stock have splendid intensity, DIMENSIONAL STABILITY, bulk, and reduces production cost to greatest extent.
In order to obtain the better products of index such as intensity, green deformation rate and thickness, the present invention preferably adopts following technical scheme: described slurry comprises by parts by mass: described slurry comprises by parts by mass: the bleached chemical softwood pulp of 5 ~ 10 parts, the bleached chemical hardwood pulp of 45 ~ 55 parts, the secondary stock of the bleached chemical thermomechanical pulp of 30 ~ 37 parts and 3 ~ 5 parts; Retain auxiliary agent and be 250 ~ 400ppm relative to the addition of ton paper, drainage auxiliary agent is 2500 ~ 4000ppm relative to the addition of ton paper.
Concrete, described filler choose in grinding calcium carbonate (GCC) and precipitated calcium carbonate (PCC) one or both; Wet strength agent chooses one or more of Lauxite (U-F), melamine resin (M-F) and polyamide diamines epichlorohydrin resin (PAE); In slurry, starch chooses cationic oxidation starch; Internal sizing agent choose in alkyl ketene dimer (AKD) or alkenyl succinic anhydride (ASA) one or both; Reservation auxiliary agent chooses positive reservation auxiliary agent and negative reservation auxiliary agent; Drainage auxiliary agent chooses Ludox or bentonite.
More specifically, precipitated calcium carbonate chosen by described filler; Described wet strength agent chooses polyamide diamines epichlorohydrin resin; Internal sizing agent chooses alkenyl succinic anhydride; Positive polyacrylamide chosen by the positive auxiliary agent that retains, and negative polyacrylamide chosen by the negative auxiliary agent that retains; Ludox selected by drainage auxiliary agent.
PAE, U-F, M-F wet strength agent has stronger cationic, paper machine System Charges can be caused after interpolation unbalance, this can have a strong impact on the retention of all components, and the present invention can balancing charge and can promote paper strength to a certain extent by add after carboxymethyl cellulose.
Another technical scheme of the present invention, the production method of hanging raw stock, comprises the following steps:
(1) loose slurry, clean slurry, the defibrination of bleached chemical hardwood pulp: add carboxymethyl cellulose before bleached chemical hardwood pulp defibrination, add wet strength agent after bleached chemical hardwood pulp defibrination, obtain mixture;
(2) mixture of step (1) gained and bleached chemical softwood pulp, bleached chemical thermomechanical pulp, secondary stock are mixed with mixed slurry;
(3) starch, the positive auxiliary agent that retains in internal sizing agent, part slurry are mixed, obtain auxiliary material mixture 1; Drainage auxiliary agent and the negative auxiliary agent that retains are mixed, obtains auxiliary material mixture 2;
(4) in the mixed slurry of step (2) gained, starch in remaining slurry is added successively, filler, auxiliary material mixture 1, auxiliary material mixture 2; Through online dehydration, press dewatering, dry, must without the hanging raw stock of top sizing;
(5) carry out top sizing to the hanging raw stock without top sizing of step (4) gained, soft calender, obtains hanging raw stock.Cypres can select arbitrary technical scheme of the prior art.
The production method of hanging raw stock of the present invention, by adding carboxymethyl cellulose before bleached chemical hardwood pulp defibrination, wet strength agent is added after bleached chemical hardwood pulp defibrination, efficiently solve the system retention compromises caused because adding wet strength agent, the maintenance paper machine stability of a system and the smooth and easy operation of guarantee paper machine are of great importance.
When hanging raw stock produced by paper machine, concrete, step (1) wet strength agent makes an addition to the rear storage barrel exit of bleached chemical hardwood pulp mill.
Step (2) bleached chemical softwood pulp being starched through faling apart, only being starched before preparation; CTMP before preparation through discongesting, only starching.
Starch in the described part slurry of step (3), accounts for the 4-12% of the interior starch of all slurries in mass ratio.
The concrete steps of step (4) are in paper machine stock tank, add starch in residue slurry in the mixed slurry of step (2) gained; Filler was added before one section of fan-shaped pump; Auxiliary material mixture 1 was added before two sections of fan-shaped pumps; Auxiliary material mixture 2 is added after two sections of fan-shaped pumps; Through online dehydration, press dewatering, dry, must without the hanging raw stock of top sizing.
Step (5) adopts soft calender, is 5 ~ 80kg/cm, preferably 20 ~ 40kg/cm on front side of calendering pressure with rear side.
Hanging raw stock provided by the invention is by selecting the bleached chemical thermomechanical pulp of high bulk, with the use of a part of secondary stock, wet strength agent and carboxymethyl cellulose conbined usage, not only reduce production cost to greatest extent, and ensure that hanging raw stock has splendid intensity, good DIMENSIONAL STABILITY and lower green deformation rate.
Detailed description of the invention
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment 1-embodiment 3
The hanging raw stock of embodiment 1-embodiment 3 is manufactured paper with pulp by slurry and auxiliary material and is formed, and the composition of its slurry and auxiliary material is as shown in table 1.
The composition of table 1 embodiment 1-embodiment 3 slurry and auxiliary material
The production method of embodiment 1 hanging raw stock is as follows:
(1) loose slurry, clean slurry, the defibrination of bleached chemical hardwood pulp: add carboxymethyl cellulose before bleached chemical hardwood pulp defibrination, wet strength agent is added after bleached chemical hardwood pulp defibrination, wet strength agent makes an addition to the rear storage barrel exit of bleached chemical hardwood pulp mill, obtains mixture.
(2) mixture of step (1) gained and bleached chemical softwood pulp, bleached chemical thermomechanical pulp and secondary stock are mixed with mixed slurry, bleached chemical softwood pulp being starched through faling apart, only being starched before preparation; CTMP before preparation through discongesting, only starching.
(3) starch, the positive auxiliary agent (polyacrylamide) that retains in internal sizing agent, 4kg slurry are mixed, obtain auxiliary material mixture 1; Drainage auxiliary agent and the negative auxiliary agent (polyacrylamide) that retains are mixed, obtains auxiliary material mixture 2;
(4) in the mixed slurry of step (2) gained, in paper machine stock tank, starch in remaining slurry is added; Filler was added before one section of fan-shaped pump; Auxiliary material mixture 1 was added before two sections of fan-shaped pumps; Auxiliary material mixture 2 is added after two sections of fan-shaped pumps; Through online dehydration, press dewatering, dry, must without the hanging raw stock of top sizing.
(5) carry out top sizing, soft calender to the hanging raw stock without top sizing of step (4) gained, batching calendering pressure is 40/40kg/cm (front/rear), obtains hanging raw stock.Cypres in the present embodiment selects oxidized starch and CMC.
Except except starch in adding 3kg in step (3) and starching in the production method of embodiment 2 hanging raw stock, all the other steps are identical with embodiment 1.
Except except starch in adding 5kg in step (3) and starching in the production method of embodiment 3 hanging raw stock, all the other steps are identical with embodiment 1.
In embodiment 1-embodiment 3, the performance of hanging raw stock is as shown in table 2.
The performance of table 2 embodiment 1-embodiment 3 hanging raw stock
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Basic weight (g/m 2) | 95 | 95 | 95 |
| Bulk (cm 3/g) | 1.78 | 1.75 | 1.72 |
| Tensile index (Nm/g) | 45 | 47 | 52 |
| Cobb60(g/m 2) | 25 | 23 | 22 |
| Wet anti-tensile retention rate (%) | 15 | 18 | 17 |
| Smoothness sec/10cc | 15/15 | 15/14 | 13/15 |
| Pull out wax degree ° A | 16/16 | 16/16 | 16/16 |
| Ash content (%) | 20 | 25 | 22 |
| Percentage elongation (%) in water | 1.43 | 1.47 | 1.42 |
Embodiment 4-embodiment 6
The hanging raw stock of embodiment 4-embodiment 6 is manufactured paper with pulp by slurry and auxiliary material and is formed, and the composition of its slurry and auxiliary material is as shown in table 3.
The composition of table 3 embodiment 4-embodiment 6 slurry and auxiliary material
Except except starch in adding 4kg in step (3) and starching in the production method of embodiment 4 hanging raw stock, all the other steps are identical with embodiment 1.
Except except starch in adding 3kg in step (3) and starching in the production method of embodiment 5 hanging raw stock, all the other steps are identical with embodiment 1.
Except except starch in adding 5kg in step (3) and starching in the production method of embodiment 6 hanging raw stock, all the other steps are identical with embodiment 1.
In embodiment 4-embodiment 6, the performance of hanging raw stock is as shown in table 4.
The performance of table 4 embodiment 4-embodiment 6 hanging raw stock
| Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Basic weight (g/m 2) | 100 | 110 | 90 |
| Bulk (cm 3/g) | 1.77 | 1.68 | 1.68 |
| Tensile index (Nm/g) | 53 | 58 | 59 |
| Cobb60(g/m 2) | 23 | 25 | 22 |
| Wet anti-tensile retention rate (%) | 15.3 | 14.9 | 15.5 |
| Smoothness sec/10cc | 7/7 | 9/9 | 8/9 |
| Pull out wax degree ° A | 16/16 | 16/16 | 16/16 |
| Ash content (%) | 19.3 | 19.1 | 19.1 |
| Percentage elongation (%) in water | 1.40 | 1.44 | 1.44 |
Comparative example
The hanging raw stock selected in comparative example is manufactured paper with pulp by slurry and auxiliary material and is formed, and wherein slurry comprises bleached chemical softwood pulp, 250kg; Bleached chemical hardwood pulp, 100kg; Bleached chemical thermomechanical pulp, 650kg;
Auxiliary material comprises precipitated calcium carbonate 250kg; PAE, 28kg; Oxidized starch, 30kg; CMC, 2kg; Starch in slurry, 20kg; AKD, 10kg; Ludox, 2kg; PAM, 800ppm.
In comparative example, the preparation method of hanging raw stock is as follows:
(1) needle bleached wood pulp, bleached chemical hardwood pulp, bleached chemical thermomechanical pulp are mixed with slurry by composition;
(2) starch, calcium carbonate, AKD, oxidized starch, CMC, PAE, PAM and Ludox in slurry are formulated as auxiliary material according to described ratio of adjuvant;
(3) by after described slurry and auxiliary material mixing, form described hanging raw stock paper pulp, described body paper paper pulp is added water and be modulated into the online slurry that online concentration is 0.6-0.9%, through fourdrinier wire dehydration, press dewatering, oven dry, top sizing, press polish ornamenting, finally roll as hanging raw stock.
Hanging raw stock prepared by comparative example is tested, obtains its performance as follows:
| Comparative example | |
| Basic weight (g/m 2) | 95 |
| Bulk (cm 3/g) | 1.68 |
| Cobb60(g/m 2) | 25 |
| Tensile index (Nm/g) | 40 |
| Wet anti-tensile retention rate (%) | 12 |
| Smoothness sec/10cc | 10/10 |
| Pull out wax degree ° A | 14/14 |
| Ash content (%) | 20 |
| Percentage elongation (%) in water | 1.5 |
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (10)
1. a hanging raw stock, manufactured paper with pulp by slurry and auxiliary material and form, it is characterized in that: described slurry comprises by parts by mass: the bleached chemical softwood pulp of 0-10 part, the bleached chemical hardwood pulp of 40 ~ 60 parts, the secondary stock of the bleached chemical thermomechanical pulp of 30 ~ 60 parts and 0 ~ 5 part;
Described auxiliary material comprises filler 15 ~ 25 parts, wet strength agent 2.0 ~ 3.5 parts, carboxymethyl cellulose 0.5 ~ 0.7 part, starch 0.8 ~ 1.2 part in slurry, internal sizing agent 1.0 ~ 2.5 parts, retains auxiliary agent, drainage auxiliary agent, retain auxiliary agent and be 50 ~ 400ppm relative to the addition of ton paper, drainage auxiliary agent is 2000 ~ 6000ppm relative to the addition of ton paper.
2. hanging raw stock according to claim 1, it is characterized in that: described slurry comprises by parts by mass: the bleached chemical softwood pulp of 5 ~ 10 parts, the bleached chemical hardwood pulp of 45 ~ 55 parts, the secondary stock of the bleached chemical thermomechanical pulp of 30 ~ 37 parts and 3 ~ 5 parts;
Retain auxiliary agent and be 250 ~ 400ppm relative to the addition of ton paper, drainage auxiliary agent is 2500 ~ 4000ppm relative to the addition of ton paper.
3. hanging raw stock according to claim 1 and 2, is characterized in that: described filler choose in grinding calcium carbonate and precipitated calcium carbonate one or both; Wet strength agent chooses one or more of Lauxite, melamine resin and polyamide diamines epichlorohydrin resin; In slurry, starch chooses cationic oxidation starch; Internal sizing agent choose in alkyl ketene dimer or alkenyl succinic anhydride one or both; Reservation auxiliary agent chooses positive reservation auxiliary agent and negative reservation auxiliary agent; Drainage auxiliary agent chooses Ludox or bentonite.
4. hanging raw stock according to claim 3, is characterized in that: precipitated calcium carbonate chosen by described filler; Described wet strength agent chooses polyamide diamines epichlorohydrin resin; Internal sizing agent chooses alkenyl succinic anhydride; Positive polyacrylamide chosen by the positive auxiliary agent that retains, and negative polyacrylamide chosen by the negative auxiliary agent that retains; Ludox selected by drainage auxiliary agent.
5. hanging raw stock according to claim 1 and 2, is characterized in that: the bulk of described bleached chemical thermomechanical pulp is 3.0cm
3/ more than g.
6. the production method of hanging raw stock described in claim 1-5, is characterized in that, comprises the following steps:
(1) loose slurry, clean slurry, the defibrination of bleached chemical hardwood pulp: add carboxymethyl cellulose before bleached chemical hardwood pulp defibrination, add wet strength agent after bleached chemical hardwood pulp defibrination, obtain mixture;
(2) mixture of step (1) gained and bleached chemical softwood pulp, bleached chemical thermomechanical pulp, secondary stock are mixed with mixed slurry;
(3) starch quality, the positive auxiliary agent that retains in internal sizing agent, part slurry are mixed, obtain auxiliary material mixture 1; Drainage auxiliary agent and the negative auxiliary agent that retains are mixed, obtains auxiliary material mixture 2;
(4) in the mixed slurry of step (2) gained, starch in remaining slurry is added successively, filler, auxiliary material mixture 1, auxiliary material mixture 2; Through online dehydration, press dewatering, dry, must without the hanging raw stock of top sizing;
(5) carry out top sizing to the hanging raw stock without top sizing of step (4) gained, soft calender, obtains hanging raw stock.
7. production method according to claim 6, is characterized in that: step (1) wet strength agent makes an addition to the rear storage barrel exit of bleached chemical hardwood pulp mill.
8. production method according to claim 6, is characterized in that: step (2) bleached chemical softwood pulp being starched through faling apart, only being starched before preparation; CTMP before preparation through discongesting, only starching.
9. production method according to claim 6, is characterized in that: starch in the described part slurry of step (3), accounts for the 30-60% of the interior starch of all slurries in mass ratio.
10. production method according to claim 6, is characterized in that: the concrete steps of step (4) are in paper machine stock tank, add starch in residue slurry in the mixed slurry of step (2) gained; Filler was added before one section of fan-shaped pump; Auxiliary material mixture 1 was added before two sections of fan-shaped pumps; Auxiliary material mixture 2 is added after two sections of fan-shaped pumps; Through online dehydration, press dewatering, dry, must without the hanging raw stock of top sizing.
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| CN104911957A (en) * | 2015-07-06 | 2015-09-16 | 湖北工业大学 | Ecological functional type wallpaper raw paper doped with dihydrate phosgypsum crystal whiskers and preparation method thereof |
| CN105735035A (en) * | 2016-03-02 | 2016-07-06 | 福建希源纸业有限公司 | Method for producing base wallpaper from waste paper deinking pulp |
| CN106192552A (en) * | 2016-08-12 | 2016-12-07 | 海南金海浆纸业有限公司 | A kind of high bulk is coated with white kraft paper and preparation method thereof |
| CN106638113A (en) * | 2016-11-29 | 2017-05-10 | 安徽索亚装饰材料有限公司 | Heat preservation wallpaper |
| CN107299555A (en) * | 2016-04-15 | 2017-10-27 | 轻工业杭州机电设计研究院 | High-strength seam connecting belt body paper and preparation method thereof |
| CN107956191A (en) * | 2017-11-03 | 2018-04-24 | 常州市雄图纺织有限公司 | A kind of preparation method of hanging raw stock |
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| CN111795934A (en) * | 2020-07-16 | 2020-10-20 | 山东世纪阳光纸业集团有限公司 | Evaluation and analysis method of titanium dioxide for decorative base paper |
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| CN104911957A (en) * | 2015-07-06 | 2015-09-16 | 湖北工业大学 | Ecological functional type wallpaper raw paper doped with dihydrate phosgypsum crystal whiskers and preparation method thereof |
| CN104911957B (en) * | 2015-07-06 | 2017-03-15 | 湖北工业大学 | Ecotype wallpaper base stock of admixture phosphogypsum dihydrate whisker and preparation method thereof |
| CN105735035A (en) * | 2016-03-02 | 2016-07-06 | 福建希源纸业有限公司 | Method for producing base wallpaper from waste paper deinking pulp |
| CN107299555A (en) * | 2016-04-15 | 2017-10-27 | 轻工业杭州机电设计研究院 | High-strength seam connecting belt body paper and preparation method thereof |
| CN106192552A (en) * | 2016-08-12 | 2016-12-07 | 海南金海浆纸业有限公司 | A kind of high bulk is coated with white kraft paper and preparation method thereof |
| CN106638113A (en) * | 2016-11-29 | 2017-05-10 | 安徽索亚装饰材料有限公司 | Heat preservation wallpaper |
| CN106638113B (en) * | 2016-11-29 | 2018-02-16 | 安徽索亚装饰材料有限公司 | A kind of insulation wallpaper |
| CN107956191A (en) * | 2017-11-03 | 2018-04-24 | 常州市雄图纺织有限公司 | A kind of preparation method of hanging raw stock |
| CN108265559A (en) * | 2018-01-09 | 2018-07-10 | 广西金桂浆纸业有限公司 | A kind of method and paper for improving paper strength |
| CN108265559B (en) * | 2018-01-09 | 2021-04-13 | 广西金桂浆纸业有限公司 | Method for improving paper strength and paper |
| CN108824093A (en) * | 2018-08-10 | 2018-11-16 | 南京林业大学 | A kind of production method reducing hanging raw stock expansion and contraction |
| CN109610225A (en) * | 2018-12-24 | 2019-04-12 | 淄博欧木特种纸业有限公司 | Latex paper and preparation method thereof |
| CN109610225B (en) * | 2018-12-24 | 2021-06-04 | 山东华沙新材料有限公司 | Latex paper and preparation method thereof |
| CN110578263A (en) * | 2019-09-16 | 2019-12-17 | 牡丹江恒丰纸业股份有限公司 | Production technology for improving wet tensile strength of wet-process paper |
| CN111795934A (en) * | 2020-07-16 | 2020-10-20 | 山东世纪阳光纸业集团有限公司 | Evaluation and analysis method of titanium dioxide for decorative base paper |
| CN114541175A (en) * | 2020-11-24 | 2022-05-27 | 金华盛纸业（苏州工业园区）有限公司 | Preparation method of high wet strength paper and high wet strength paper |
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Effective date of registration: 20220705 Address after: 212132, No. 8 Tung Hing East Road, Dagang, Jiangsu, Zhenjiang Patentee after: Goldeast Paper (Jiangsu) Co.,Ltd. Address before: Suzhou City, Jiangsu province 215126 Industrial Park Shengpu Kim Seung Road No. 2 Patentee before: GOLD HUASHENG PAPER (SUZHOU INDUSTRIAL PARK) Co.,Ltd. |