CN108797201A - A kind of corrugation paper gluing agents and preparation method thereof - Google Patents
A kind of corrugation paper gluing agents and preparation method thereof Download PDFInfo
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- CN108797201A CN108797201A CN201810595020.6A CN201810595020A CN108797201A CN 108797201 A CN108797201 A CN 108797201A CN 201810595020 A CN201810595020 A CN 201810595020A CN 108797201 A CN108797201 A CN 108797201A
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/18—Homopolymers or copolymers of nitriles
- C09J133/20—Homopolymers or copolymers of acrylonitrile
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention discloses a kind of corrugation paper gluing agents and preparation method thereof, include the following steps：Prepare mix monomer, prepare initiator solution, 400 parts by weight of deionized water are added into a jacketed stirred tank, stirring is opened, the oxidised maize starch of 30~35 parts by weight is added, opens heating, when temperature of charge reaches 90 DEG C, heat preservation 30 minutes, sequentially adds 0.01~0.02 parts by weight of ferrous sulfate, 2~3 parts by weight of hydrogen peroxide, then keeps the temperature 15 minutes；Add 0.3~0.5 parts by weight of cationic emulsifier N- [3- dodecyl polyoxyethylene ethers (9) -2- hydroxyls] propyl-N, N, N- trimethyl ammonium chloride；Then start to be slowly added to mix monomer and initiator solution simultaneously, the time was added at 2~4 hours in control, keeps the temperature 1 hour in 90 DEG C of temperature after the completion of charging, obtains corrugation paper gluing agents.
Description
Technical field
The present invention relates to a kind of corrugation paper gluing agents and preparation method thereof.
Background technology
Top sizing be it is a kind of to paper surface processing to improve the important way of its application performance.It is needed in processing procedure
It to be coated with a certain amount of sizing material in the equal sentence of paper surface（General coating weight control is in 0.3~2g/m2Between）.At top sizing
Reason not only increases the resistant to liquids penetrating power of paper, and can also improve its mechanical strength, surface property and printing performance, together
When reduce the dosage of internal sizing agent, alleviate due to the problems such as machinery stains caused by plasm-glue-blending.Cypres
Type is divided into three kinds of cationic, anionic and nonionic.Cationic surface-sizing agent can be to the moon of paper fibre
Ionic group generates suction-operated, and hydrophobic grouping forms hydrophobic layer after stablizing, so as to improve the performance of paper.Anionic surface
Sizing agent using when need additional precipitating reagent to be complexed and be gathered in paper surface, the performance of paper is improved after film forming.
The principal item of Cypres have starch, guar gum, gelatin, cellulose and hemicellulose, shellac, chitin and
Alginic acid, gum rosin etc..With the development of petrochemical industry and high polymer synthesis industry, the surface of acrylate polymer series is applied
Application of the jelly in papermaking is more and more extensive.It includes the homopolymer and copolymer of acrylic ester monomer.For producing third
The monomer of olefine acid ester polymer can be divided into soft monomer, hard monomer and function monomer three classes.Glass transition temperature is lower（Methyl）
Alkyl acrylate is common soft monomer, it has softness, good fluidity, adhesion strength high and is easy to soak sticker surface etc.
Feature.But since cohesive performance is undesirable, polymer prepared by when exclusive use is too soft to influence practical application performance.Therefore,
People are generally copolymerized using the higher hard monomer of glass transition temperature and soft monomer to adjust the glass transition temperature of polymer, and raising makes
With temperature, improve hydrophobicity, adhesive strength and the transparency.In the molecule of function monomer containing carboxyl, epoxy group, hydroxyl, amido,
The functional groups such as amide groups can adjust the polarity of polymerizate, and can form crosslinking polymer, realize the work(of polymer
Energyization.Due to acrylate polymer have excellent weatherability, film forming and caking property, molecular structure can as needed into
Row adjustment, and multiple functions monomer can be added, polymer is made to have special function, it can significantly improve the property of paper
Can, become the research hotspot of domestic and foreign scholars.Someone has synthesized the cationic crosslinked polymerization containing epoxy and quaternary ammonium group
Object Cypres have studied influence of the factors such as monomeric species and dosage, initiator type to top sizing effect.Grind the hair that makes internal disorder or usurp
The film forming of existing surface size can significantly improve paper performance.Azodiisobutyronitrile is to be suitable for preparing efficient surface sizing agent
Initiator.
Fu little Long etc. is connect using the method for emulsifier-free emulsion polymerization on cationic starch molecule using Fenton reagent as initiator
Branch styrene-acrylic monomer, has synthesized a kind of St/ba Soap-free Emulsion Cypres.The emulsion particle diameter narrow distribution of synthesis, film forming
Property is preferable.When Cypres dosage is 0.4%, the ring crush index and degree of sizing of paper significantly improve.Somebody is with benzene second
Alkene, butyl acrylate, acrylamide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and vinyl silane triisopropoxide are original
Material, cation type organic silicon acrylic acid ester emulsion Cypres are prepared for by semi-continuous emulsion polymerizing method.The lotion has
There is excellent stability, can significantly improve the hydrophobicity and mechanical performance of corrugated paper.It is glued body with pure anion tapioca
System compares, and is applied using what 0.4% cation type organic silicon acrylic acid ester emulsion and 99.6% anion tapioca formed
Colloid system handling of paper can make its Cobb value decline 40%, and ring crush index increases by 20%.Zhang Guanghua etc. is good using compatibility
Vinyl monomer dissolving recycling waste polystyrene foam material, be prepared for the no-solvent type Cypres haveing excellent performance,
This Cypres can make the top sizing degree of paper improve 17 times, and ring crush intensity improves 21%, and deflection improves 33%.
Chinese patent CN201610747606.0 discloses preparation method and its production of a kind of corrugated paper Cypres
Product and application.Wherein, the corrugated paper Cypres are mixed by corrugated paper Cypres base-material, cationic additive
Uniformly it is made；The preparation process of corrugated paper Cypres base-material includes：By cationic monomer, cross-linking monomer,（Methyl）Third
Olefin(e) acid esters monomer,（Methyl）Styrene, initiator, acetic acid and water are added into reaction vessel, carry out Raolical polymerizable,
Generate corrugated paper Cypres base-material；The preparation process of cationic additive includes：By alkyl ketene dimer be added to
It in the aqueous solution of cationic emulsifier, is sufficiently stirred, carries out emulsion dispersion, obtain cationic additive.It is carried according to the present invention
Cypres are not only able to rapid aging made from the method for confession, increase substantially the ring crush intensity of corrugated paper, are greatly reduced
Cobb values, and with very strong anti-performance of getting damp.
Chinese patent CN201610746733.9 discloses a kind of preparation method of efficient surface sizing agent, including following step
Suddenly：Methyl styrene, acrylic ester monomer, cross-linking monomer, cationic monomer and initiator are uniformly mixed and are formed by step 1
Mix monomer；The mix monomer obtained in 10-20% step 1 is added in four-hole boiling flask, is warming up to 80-140 DEG C for step 2,
Remaining mix monomer is added dropwise after 5-20 minutes in reaction, then keeps the temperature 0.5-1.5 hours for 80-140 DEG C；Acetic acid is added in step 3,
80-140 DEG C is reacted 20-60 minutes；The deionized water of 80-100 DEG C of preheating is added in step 4, and the reaction was continued 0.5-2 hours, cold
But, it filters, obtains efficient surface sizing agent.Cobb values, energy can be not only greatly reduced quickly in the efficient surface sizing agent of the present invention
Curing, substantially lower machine is just ripe, and the surface that paperboard body paper can be increased substantially in the case where sizing agent dosage is constant is strong.
Chinese patent CN201610747571.0 discloses preparation method and its production of a kind of corrugated paper Cypres
Product and application.Wherein, the corrugated paper Cypres are mixed by corrugated paper Cypres base-material, cationic additive
Uniformly it is made；The preparation process of corrugated paper Cypres base-material includes：By cationic monomer, siloxanes,（Methyl）Propylene
Esters of gallic acid monomer,（Methyl）Styrene, initiator, acetic acid and water are added into reaction vessel, carry out Raolical polymerizable, raw
At corrugated paper Cypres base-material；The preparation process of cationic additive includes：Zhiyang is added in alkyl ketene dimer
It in the aqueous solution of ionic emulsifying agent, is sufficiently stirred, carries out emulsion dispersion, obtain cationic additive.It is provided according to the present invention
Method made from Cypres be not only able to rapid aging, increase substantially the ring crush intensity of corrugated paper, be greatly reduced
Cobb values, and with very strong anti-performance of getting damp.
Invention content
A kind of corrugation paper gluing agents of the present invention and preparation method thereof, include the following steps：Prepare mix monomer：By acrylic acid
15~20 parts by weight of butyl ester, 10~15 parts by weight of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl methacrylate 70
~80 parts by weight, 8~12 parts by weight of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：2~3 parts by weight of hydrogen peroxide, 30 parts by weight of deionized water carry out being mixed and made into initiator water-soluble
Liquid；
400 parts by weight of deionized water are added into a jacketed stirred tank, open stirring, the oxidation that 30~35 parts by weight are added is beautiful
Rice starch opens heating, when temperature of charge reaches 90 DEG C, keeps the temperature 30 minutes, sequentially adds 0.01~0.02 weight of ferrous sulfate
Part, 2~3 parts by weight of hydrogen peroxide are measured, then keep the temperature 15 minutes；Add cationic emulsifier N-[3-dodecyl polyoxy second
(9)-2-hydroxyl of alkene ether] propyl-N, N, 0.3~0.5 parts by weight of N-trimethyl ammonium chloride；Then start while slow
It is added mix monomer and initiator solution, the time is added at 2~4 hours in control, and 1 is kept the temperature in 90 DEG C of temperature after the completion of charging
Hour, obtain corrugation paper gluing agents.
Specific implementation mode
Embodiment 1
Prepare mix monomer：By 15 kg of butyl acrylate, 10 kg of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl-prop
70 kg of e pioic acid methyl ester, 8 kg of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：Hydrogen peroxide 2kg, 30 kg of deionized water carry out being mixed and made into initiator solution；
400 kg of deionized water is added into a jacketed stirred tank, opens stirring, the oxidised maize starch of 30 kg is added, opens
Heating is opened, when temperature of charge reaches 90 DEG C, 30 minutes is kept the temperature, sequentially adds ferrous sulfate 10g, 2 kg of hydrogen peroxide, then protect
Temperature 15 minutes；Add cationic emulsifier N-[(9)-2-hydroxyl of 3-dodecyl polyoxyethylene ether] propyl-N, N
, 0.3 kg of N-trimethyl ammonium chloride；Then start to be slowly added to mix monomer and initiator solution simultaneously, when control is added
Between at 2 hours, keep the temperature 1 hour in 90 DEG C of temperature after the completion of charging, obtain corrugation paper gluing agents.
Embodiment 2
Prepare mix monomer：By 20 kg of butyl acrylate, 15 kg of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl-prop
80 kg of e pioic acid methyl ester, 12 kg of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：3 kg of hydrogen peroxide, 30 kg of deionized water carry out being mixed and made into initiator solution；
400 kg of deionized water is added into a jacketed stirred tank, opens stirring, the oxidised maize starch of 35 kg is added, opens
Heating is opened, when temperature of charge reaches 90 DEG C, 30 minutes is kept the temperature, sequentially adds ferrous sulfate 20g, 3 kg of hydrogen peroxide, then protect
Temperature 15 minutes；Add cationic emulsifier N-[(9)-2-hydroxyl of 3-dodecyl polyoxyethylene ether] propyl-N, N
, 0.5 kg of N-trimethyl ammonium chloride；Then start to be slowly added to mix monomer and initiator solution simultaneously, when control is added
Between at 4 hours, keep the temperature 1 hour in 90 DEG C of temperature after the completion of charging, obtain corrugation paper gluing agents.
Embodiment 3
Prepare mix monomer：By 20 kg of butyl acrylate, 12 kg of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl-prop
70 kg of e pioic acid methyl ester, 12 kg of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：Hydrogen peroxide 2kg, 30 kg of deionized water carry out being mixed and made into initiator solution；
400 kg of deionized water is added into a jacketed stirred tank, opens stirring, the oxidised maize starch of 35 kg is added, opens
Heating is opened, when temperature of charge reaches 90 DEG C, 30 minutes is kept the temperature, sequentially adds ferrous sulfate 10g, 3 kg of hydrogen peroxide, then protect
Temperature 15 minutes；Add cationic emulsifier N-[(9)-2-hydroxyl of 3-dodecyl polyoxyethylene ether] propyl-N, N
, 0.3 kg of N-trimethyl ammonium chloride；Then start to be slowly added to mix monomer and initiator solution simultaneously, when control is added
Between at 4 hours, keep the temperature 1 hour in 90 DEG C of temperature after the completion of charging, obtain corrugation paper gluing agents.
Embodiment 4
Prepare mix monomer：By butyl acrylate 18kg, 14 kg of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl-prop
75 kg of e pioic acid methyl ester, 10 kg of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：2.5 kg of hydrogen peroxide, 30 kg of deionized water carry out being mixed and made into initiator solution；
400 kg of deionized water is added into a jacketed stirred tank, opens stirring, the oxidised maize starch of 32kg is added, opens
Heating keeps the temperature 30 minutes, sequentially adds ferrous sulfate 15g, 2.5 kg of hydrogen peroxide, then protect when temperature of charge reaches 90 DEG C
Temperature 15 minutes；Add cationic emulsifier N-[(9)-2-hydroxyl of 3-dodecyl polyoxyethylene ether] propyl-N, N
, N-trimethyl ammonium chloride 0.4kg；Then start to be slowly added to mix monomer and initiator solution simultaneously, the time is added in control
At 3 hours, 1 hour is kept the temperature in 90 DEG C of temperature after the completion of charging, obtains corrugation paper gluing agents.
Embodiment 5
Prepare mix monomer：By 17 kg of butyl acrylate, 13 kg of methacrylic acid acyloxyethyl trimethyl ammonium chloride, methyl-prop
78 kg of e pioic acid methyl ester, acrylonitrile 11kg carry out being mixed and made into mix monomer；
Prepare initiator solution：2.8 kg of hydrogen peroxide, 30 kg of deionized water carry out being mixed and made into initiator solution；
400 kg of deionized water is added into a jacketed stirred tank, opens stirring, the oxidised maize starch of 33 kg is added, opens
Heating is opened, when temperature of charge reaches 90 DEG C, 30 minutes is kept the temperature, sequentially adds ferrous sulfate 18kg, 2.8 kg of hydrogen peroxide, then
Heat preservation 15 minutes；Add cationic emulsifier N-[(9)-2-hydroxyl of 3-dodecyl polyoxyethylene ether] propyl-N
, N, 0.45 kg of N-trimethyl ammonium chloride；Then start to be slowly added to mix monomer and initiator solution simultaneously, control adds
The angle of incidence kept the temperature 1 hour in 90 DEG C of temperature after the completion of charging, and obtained corrugation paper gluing agents at 4 hours.
Claims (1)
1. a kind of corrugation paper gluing agents and preparation method thereof, include the following steps：Prepare mix monomer：By butyl acrylate 15~
20 parts by weight, 10~15 parts by weight of methacrylic acid acyloxyethyl trimethyl ammonium chloride, 70~80 weight of methyl methacrylate
Part, 8~12 parts by weight of acrylonitrile carry out being mixed and made into mix monomer；
Prepare initiator solution：2~3 parts by weight of hydrogen peroxide, 30 parts by weight of deionized water carry out being mixed and made into initiator water-soluble
Liquid；
400 parts by weight of deionized water are added into a jacketed stirred tank, open stirring, the oxidation that 30~35 parts by weight are added is beautiful
Rice starch opens heating, when temperature of charge reaches 90 DEG C, keeps the temperature 30 minutes, sequentially adds 0.01~0.02 weight of ferrous sulfate
Part, 2~3 parts by weight of hydrogen peroxide are measured, then keep the temperature 15 minutes；Add cationic emulsifier N-[3-dodecyl polyoxy second
(9)-2-hydroxyl of alkene ether] propyl-N, N, 0.3~0.5 parts by weight of N-trimethyl ammonium chloride；Then start while slow
It is added mix monomer and initiator solution, the time is added at 2~4 hours in control, and 1 is kept the temperature in 90 DEG C of temperature after the completion of charging
Hour, obtain corrugation paper gluing agents.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810595020.6A CN108797201A (en) | 2018-06-11 | 2018-06-11 | A kind of corrugation paper gluing agents and preparation method thereof |
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| CN108797201A true CN108797201A (en) | 2018-11-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892440A (en) * | 2022-05-15 | 2022-08-12 | 成都奥睿尔科技创新服务有限公司 | Special glue applying powder for packaging paper |
| CN115010861A (en) * | 2022-07-07 | 2022-09-06 | 华东理工大学 | Preparation method of corrugated paper surface sizing agent |
| CN117488557A (en) * | 2024-01-03 | 2024-02-02 | 江苏奥凯环境技术有限公司 | Filter bag capable of inhibiting condensation and dust adhesion and processing technology thereof |
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| CN101225623A (en) * | 2008-01-09 | 2008-07-23 | 杨春先 | Surface sizing agent for paper making |
| CN101558093A (en) * | 2006-12-14 | 2009-10-14 | 巴斯夫欧洲公司 | Fine-particulate polymer dispersions comprising starch |
| CN104592448A (en) * | 2014-05-10 | 2015-05-06 | 嘉兴市汇丰环保材料有限公司 | Surface sizing agent preparation method |
| CN108004841A (en) * | 2017-12-25 | 2018-05-08 | 浙江传化华洋化工有限公司 | A kind of Cypres and preparation method thereof |
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2018
- 2018-06-11 CN CN201810595020.6A patent/CN108797201A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558093A (en) * | 2006-12-14 | 2009-10-14 | 巴斯夫欧洲公司 | Fine-particulate polymer dispersions comprising starch |
| CN101225623A (en) * | 2008-01-09 | 2008-07-23 | 杨春先 | Surface sizing agent for paper making |
| CN104592448A (en) * | 2014-05-10 | 2015-05-06 | 嘉兴市汇丰环保材料有限公司 | Surface sizing agent preparation method |
| CN108004841A (en) * | 2017-12-25 | 2018-05-08 | 浙江传化华洋化工有限公司 | A kind of Cypres and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892440A (en) * | 2022-05-15 | 2022-08-12 | 成都奥睿尔科技创新服务有限公司 | Special glue applying powder for packaging paper |
| CN115010861A (en) * | 2022-07-07 | 2022-09-06 | 华东理工大学 | Preparation method of corrugated paper surface sizing agent |
| CN117488557A (en) * | 2024-01-03 | 2024-02-02 | 江苏奥凯环境技术有限公司 | Filter bag capable of inhibiting condensation and dust adhesion and processing technology thereof |
| CN117488557B (en) * | 2024-01-03 | 2024-03-29 | 江苏奥凯环境技术有限公司 | Filter bag capable of inhibiting condensation and dust adhesion and processing technology thereof |
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Application publication date: 20181113 |