CN107034730A - A kind of preparation method of moistureproof quick-dry type Cypres - Google Patents
A kind of preparation method of moistureproof quick-dry type Cypres Download PDFInfo
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- CN107034730A CN107034730A CN201710190863.3A CN201710190863A CN107034730A CN 107034730 A CN107034730 A CN 107034730A CN 201710190863 A CN201710190863 A CN 201710190863A CN 107034730 A CN107034730 A CN 107034730A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a kind of preparation method of moistureproof quick-dry type Cypres, belong to paper making additive preparing technical field.The present invention first adds chitosan into immersion in sodium hydroxide solution and is swelled, it is subsequently added chloroacetic acid solution stirring reaction, collect product suction filtration and obtain filter cake, Washing of Filter Cake is obtained into carboxymethyl chitosan, again by stearic acid, silane coupler etc. obtains mixed liquor with absolute ethyl alcohol and stirring, by itself and carboxymethyl chitosan, water heating response, with dimethyl silicone polymer after collection product revolving, the heating responses such as polyethylene glycol, last natural cooling can obtain moistureproof quick-dry type Cypres, moistureproof quick-dry type Cypres produced by the present invention have sizing efficiency good, humidity resistance is good, the fast advantage of rate of drying, every strength character of paper after applying glue can be effectively improved, improve paper moistureproof, water resistant ability, with preferable prospect of the application.
Description
Technical field
The invention discloses a kind of preparation method of moistureproof quick-dry type Cypres, belong to paper making additive technology of preparing neck
Domain.
Background technology
Except toilet paper, filter paper and cigarette paper etc. are special with addition to paper, about 80% paper be required in paper pulp addition or
Paper surface is coated with some water-resistance materials, paper is had the performance of delay fluid permeability, to reach anti-ink (as write
Paper), oil resistant (such as food wrapper) purpose, this technical process is referred to as applying glue, the material added referred to as sizing agent.Papermaking
Chemicals is widely used in the processes such as paper-making pulping, wet end, top sizing, coating and wastewater treatment.Wherein top sizing is
A process in paper finishing processes, by spraying one layer of glue on page, forms the film of one layer of nearly continuity, so as to reach
To the purpose for changing paper surface properties.The surface enhanced and printability improvement result of top sizing can improve the quality shelves of paper
Secondary and increase economic efficiency, therefore, top sizing is increasingly paid attention to by paper industry.
Conventional Cypres are divided into natural polymer Cypres and synthetic surface sizing agent, and wherein starch is one
Plant important natural polymer Cypres and paper strengthening agent.Synthetic surface sizing agent has polyvinyl alcohol (PVA), carboxymethyl
Cellulose (CMC), polyacrylamide (PAM) etc., the acrylic acid ester emulsion system studied and be most widely used at present is in body
Hard monomer styrene and acrylic compounds function monomer are introduced in system.However, these existing Cypres are applied on progress surface
Easily bubbled during glue, so that the strength character to sized paper causes detrimental effect, these existing top sizings in addition
Agent also has in Process of Applying Glue that consumption is big, slow drying speed, and the film layer of formation is easily tacky, the problem of easily getting damp, these shapes
Condition seriously hinders the application and popularization of sizing agent.
The content of the invention
Present invention mainly solves technical problem：Easily bubbled in applying glue for existing Cypres, can be to applying
The strength character of gummed paper is adversely affected, and has that consumption in Process of Applying Glue is big, slow drying speed, and the film layer of formation is easy
It is tacky, easily occur after the defect got damp steeps partial hydrolysis by raw material of chitosan there is provided one kind through alkali that carboxy methylation increase is lived again
Property group, then with stearic acid increased response hydrophobicity and improving film forming viscosity stability, be re-introduced into siloxanes and organo-bismuth increase
Rate of drying is first added chitosan into sodium hydroxide solution the method for preparing moistureproof quick-dry type Cypres, the present invention
Immersion is swelled, and is subsequently added chloroacetic acid solution stirring reaction, is collected product suction filtration and is obtained filter cake, Washing of Filter Cake is obtained into carboxymethyl chitosan
Sugar, then stearic acid, silane coupler etc. and absolute ethyl alcohol and stirring are obtained into mixed liquor, itself and carboxymethyl chitosan, water are heated anti-
Should, collect after product revolving with the heating response such as dimethyl silicone polymer, polyethylene glycol, last natural cooling can obtain moistureproof fast
Dry type Cypres, moistureproof quick-dry type Cypres produced by the present invention have that sizing efficiency is good, humidity resistance is good, dried
Fireballing advantage, can effectively improve every strength character of paper after applying glue, improve that paper is moistureproof, water resistant ability, with compared with
Good prospect of the application.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
(1) 30~40g chitosans are weighed it is added to and fills 200~300mL mass fractions for 10% sodium hydroxide solution
In beaker, and it is heated to 70~80 DEG C, immersion is swelled after 4~5h, obtains the chitosan gel rubber that alkalizes, alkalization chitosan gel rubber is put
In the three-necked flask with thermometer and reflux, flask is placed in ice-water bath, control temperature is at 0~5 DEG C, then to burning
It is 25% chloroacetic acid solution that 25~30mL mass fractions are added dropwise in bottle, and it is 5~8mL/min to control drop rate, treats completion of dropping,
2~3h of stirring reaction, reaction terminates, and collects product and is placed in suction filtration in Buchner funnel, collects filter cake, is 75% with mass fraction
Ethanol solution washing filter cake 3~5 times, obtains carboxymethyl chitosan, standby；
(2) 5~8g stearic acid, 1~3g silane resin acceptor kh-550s and 0.3~0.5gN- HOSu NHSs is weighed to add
Enter into the beaker for filling 80~100mL absolute ethyl alcohols, stirring 15~20min of mixing obtains mixed liquor；
(3) carboxymethyl chitosan for taking 15~20g steps (1) standby is added in the flask for filling 200~300mL water,
Flask is placed in water-bath, the above-mentioned mixed liquors of 25~30mL are added dropwise at 25~30 DEG C, then into flask in control temperature, control drop
Acceleration is 8~10mL/min, after completion of dropping, is warming up to 80~90 DEG C, 5~6h of stirring reaction, reaction terminates, and collects production
Thing, is placed in Rotary Evaporators, and spin concentration obtains concentrate to the 1/5 of product original volume；
(4) count by weight, weigh 35~45 portions of above-mentioned concentrates, 3~5 parts of dimethyl silicone polymers, 0.3~0.5
Part DTAC, 5~8 parts of polyethylene glycol, 0.1~0.3 part of isooctyl acid bismuth, 0.8~1.0g tin dilaurates two
Butyl tin and 25~30 parts of mass fractions are 75% ethanol solution, are added in beaker, and carry out being heated to 60~70 DEG C, stirring
React after 40~50min, stop heating, treat that it naturally cools to room temperature, you can obtain moistureproof quick-dry type Cypres.
The present invention application process be：30~50L moistureproof quick-dry type Cypres produced by the present invention are added first
In paper machine feed barrel, later on paper machine carries out paper technology, when not dried after sheet formation, and paper surface is carried out
Glue-applying technique, it is 75~90 DEG C to control applying glue temperature, and resin added is 2.5~2.8kg/t paper, finally treats that applying glue is completed, by paper
Paper machine drying position is delivered to be dried.After testing, sizing agent retention produced by the present invention makes up to more than 99.5%
With efficiency high, after applying glue the tensile strength of paper up to 7~9kN/m, folding strength up to 60~90 times, paper ring crush index is 7.4~
8.6Nm/g, the bursting strength of paper is up to 600~700kPa, while sizing agent of the present invention has preferably moistureproof, water resistance,
Experiment of dripping is carried out on paper after applying glue, 2~5h does not have water to penetrate into paper, and sizing agent rate of drying of the present invention is very fast,
The drying time of paper shortens 1~2 times compared with using conventional size agent after applying glue.
The beneficial effects of the invention are as follows：
(1) moistureproof quick-dry type Cypres consumption produced by the present invention is small, the fibre that can be penetrated into page after applying glue
Tie up in gap, so as to improve the bond strength between paper and cardboard internal fiber, tensile strength and folding strength equal strength property；
(2) moistureproof quick-dry type Cypres produced by the present invention effectively increase finished product ring crush intensity and surface it is strong
Degree, gained finished product has fairly good water resistant moisture resistance, and Cypres produced by the present invention belong to quick-dry type product, can have
Effect shortens paper drying time after applying glue, can effectively improve production efficiency.
Embodiment
30~40g chitosans are weighed first be added to fill 200~300mL mass fractions for 10% sodium hydroxide solution
In beaker, and it is heated to 70~80 DEG C, immersion is swelled after 4~5h, obtains the chitosan gel rubber that alkalizes, alkalization chitosan gel rubber is put
In the three-necked flask with thermometer and reflux, flask is placed in ice-water bath, control temperature is at 0~5 DEG C, then to burning
It is 25% chloroacetic acid solution that 25~30mL mass fractions are added dropwise in bottle, and it is 5~8mL/min to control drop rate, treats completion of dropping,
2~3h of stirring reaction, reaction terminates, and collects product and is placed in suction filtration in Buchner funnel, collects filter cake, is 75% with mass fraction
Ethanol solution washing filter cake 3~5 times, obtains carboxymethyl chitosan, standby；Then weigh 5~8g stearic acid, 1~3g silane even
Connection agent KH-550 and 0.3~0.5gN- HOSu NHS is added in the beaker for filling 80~100mL absolute ethyl alcohols, is stirred
15~20min is mixed, mixed liquor is obtained；The carboxymethyl chitosan for taking 15~20g standby again, which is added to, fills 200~300mL water
Flask in, flask is placed in water-bath, control temperature at 25~30 DEG C, then into flask be added dropwise the above-mentioned mixing of 25~30mL
Liquid, controls rate of addition for 8~10mL/min, after completion of dropping, is warming up to 80~90 DEG C, 5~6h of stirring reaction, reaction knot
Beam, collects product, is placed in Rotary Evaporators, spin concentration obtains concentrate to the 1/5 of product original volume；Finally by weight
Number meter is measured, 35~45 portions of above-mentioned concentrates, 3~5 parts of dimethyl silicone polymers, 0.3~0.5 part of trimethyl are weighed
Ammonium chloride, 5~8 parts of polyethylene glycol, 0.1~0.3 part of isooctyl acid bismuth, 0.8~1.0g dibutyl tin laurates and 25~30 parts
Mass fraction is 75% ethanol solution, is added in beaker, and 60~70 DEG C, 40~50min of stirring reaction are heated to beaker
Afterwards, stop heating, treat that it naturally cools to room temperature, you can obtain moistureproof quick-dry type Cypres.
Example 1
Weigh first 30g chitosans be added to fill 200mL mass fractions be 10% sodium hydroxide solution beaker in, and
70 DEG C are heated to, immersion is swelled after 4h, obtain the chitosan gel rubber that alkalizes, alkalization chitosan gel rubber is placed in thermometer and returned
In the three-necked flask for flowing device, flask is placed in ice-water bath, control temperature is at 0 DEG C, then the dropwise addition 25mL mass point into flask
Number is 25% chloroacetic acid solution, and it is 5mL/min to control drop rate, treats completion of dropping, stirring reaction 2h, reaction terminates, and is collected
Product is placed in suction filtration in Buchner funnel, collects filter cake, is that 75% ethanol solution washs filter cake 3 times with mass fraction, obtains carboxylic
Methyl chitosan, it is standby；5g stearic acid, 1g silane resin acceptor kh-550s and 0.3gN- HOSu NHSs is then weighed to add
Into the beaker for filling 80mL absolute ethyl alcohols, stirring mixing 15min obtains mixed liquor；The carboxymethyl chitosan for taking 15g standby again
It is added in the flask for filling 200mL water, flask is placed in water-bath, control temperature is added dropwise at 25 DEG C, then into flask
The above-mentioned mixed liquors of 25mL, control rate of addition for 8mL/min, after completion of dropping, are warming up to 80 DEG C, stirring reaction 5h, reaction knot
Beam, collects product, is placed in Rotary Evaporators, spin concentration obtains concentrate to the 1/5 of product original volume；Finally by weight
Measure number meter, weigh 35 portions of above-mentioned concentrates, 3 parts of dimethyl silicone polymers, 0.3 part of DTAC, 5 parts gather
Ethylene glycol, 0.1 part of isooctyl acid bismuth, 0.8g dibutyl tin laurates and 25 parts of mass fractions are 75% ethanol solution, are added to
In beaker, and beaker is heated to after 60 DEG C, stirring reaction 40min, stops heating, treat that it naturally cools to room temperature, you can
To moistureproof quick-dry type Cypres.
This example operation is easy, is made in use, first adding 30L moistureproof quick-dry type Cypres produced by the present invention
In paper machine feed barrel, later on paper machine carries out paper technology, and when not dried after sheet formation, paper surface is glued
Technique, it is 75 DEG C to control applying glue temperature, and resin added is 2.5kg/t paper, finally treats that applying glue is completed, paper sheet delivery to paper machine is dried
Dried at position.After testing, sizing agent retention produced by the present invention is up to 99.6%, and service efficiency is high, paper after applying glue
The tensile strength opened reaches 7kN/m, and folding strength is up to 60 times, and paper ring crush index is 7.4Nm/g, and the bursting strength of paper reaches
600kPa, while sizing agent of the present invention has carries out experiment of dripping on preferably moistureproof, water resistance, the paper after applying glue,
2h does not have water to penetrate into paper, and sizing agent rate of drying of the present invention is very fast, and the drying time of paper is applied compared with using tradition after applying glue
Jelly shortens 1 times.
Example 2
Weigh first 35g chitosans be added to fill 250mL mass fractions be 10% sodium hydroxide solution beaker in, and
75 DEG C are heated to, immersion is swelled after 4h, obtain the chitosan gel rubber that alkalizes, alkalization chitosan gel rubber is placed in thermometer and returned
In the three-necked flask for flowing device, flask is placed in ice-water bath, control temperature is at 3 DEG C, then the dropwise addition 28mL mass point into flask
Number is 25% chloroacetic acid solution, and it is 7mL/min to control drop rate, treats completion of dropping, stirring reaction 2h, reaction terminates, and is collected
Product is placed in suction filtration in Buchner funnel, collects filter cake, is that 75% ethanol solution washs filter cake 4 times with mass fraction, obtains carboxylic
Methyl chitosan, it is standby；7g stearic acid, 2g silane resin acceptor kh-550s and 0.4gN- HOSu NHSs is then weighed to add
Into the beaker for filling 90mL absolute ethyl alcohols, stirring mixing 18min obtains mixed liquor；The carboxymethyl chitosan for taking 18g standby again
It is added in the flask for filling 250mL water, flask is placed in water-bath, control temperature is added dropwise at 28 DEG C, then into flask
The above-mentioned mixed liquors of 28mL, control rate of addition for 9mL/min, after completion of dropping, are warming up to 85 DEG C, stirring reaction 5h, reaction knot
Beam, collects product, is placed in Rotary Evaporators, spin concentration obtains concentrate to the 1/5 of product original volume；Finally by weight
Measure number meter, weigh 40 portions of above-mentioned concentrates, 4 parts of dimethyl silicone polymers, 0.4 part of DTAC, 7 parts gather
Ethylene glycol, 0.2 part of isooctyl acid bismuth, 0.9g dibutyl tin laurates and 29 parts of mass fractions are 75% ethanol solution, are added to
In beaker, and beaker is heated to after 65 DEG C, stirring reaction 45min, stops heating, treat that it naturally cools to room temperature, you can
To moistureproof quick-dry type Cypres.
This example operation is easy, is made in use, first adding 40L moistureproof quick-dry type Cypres produced by the present invention
In paper machine feed barrel, later on paper machine carries out paper technology, and when not dried after sheet formation, paper surface is glued
Technique, it is 83 DEG C to control applying glue temperature, and resin added is 2.6kg/t paper, finally treats that applying glue is completed, paper sheet delivery to paper machine is dried
Dried at position.After testing, sizing agent retention produced by the present invention is up to 99.7%, and service efficiency is high, paper after applying glue
The tensile strength opened reaches 8kN/m, and folding strength is up to 75 times, and paper ring crush index is 8.0Nm/g, and the bursting strength of paper reaches
650kPa, while sizing agent of the present invention has carries out experiment of dripping on preferably moistureproof, water resistance, the paper after applying glue,
4h does not have water to penetrate into paper, and sizing agent rate of drying of the present invention is very fast, and the drying time of paper is applied compared with using tradition after applying glue
Jelly shortens 1 times.
Example 3
Weigh first 40g chitosans be added to fill 300mL mass fractions be 10% sodium hydroxide solution beaker in, and
80 DEG C are heated to, immersion is swelled after 5h, obtain the chitosan gel rubber that alkalizes, alkalization chitosan gel rubber is placed in thermometer and returned
In the three-necked flask for flowing device, flask is placed in ice-water bath, control temperature is at 5 DEG C, then the dropwise addition 30mL mass point into flask
Number is 25% chloroacetic acid solution, and it is 8mL/min to control drop rate, treats completion of dropping, stirring reaction 3h, reaction terminates, and is collected
Product is placed in suction filtration in Buchner funnel, collects filter cake, is that 75% ethanol solution washs filter cake 5 times with mass fraction, obtains carboxylic
Methyl chitosan, it is standby；8g stearic acid, 3g silane resin acceptor kh-550s and 0.5gN- HOSu NHSs is then weighed to add
Into the beaker for filling 100mL absolute ethyl alcohols, stirring mixing 20min obtains mixed liquor；The carboxymethyl chitosan for taking 20g standby again
Sugar is added in the flask for filling 300mL water, and flask is placed in water-bath, and control temperature is added dropwise at 30 DEG C, then into flask
The above-mentioned mixed liquors of 30mL, control rate of addition for 10mL/min, after completion of dropping, are warming up to 90 DEG C, stirring reaction 6h, reaction knot
Beam, collects product, is placed in Rotary Evaporators, spin concentration obtains concentrate to the 1/5 of product original volume；Finally by weight
Measure number meter, weigh 45 portions of above-mentioned concentrates, 5 parts of dimethyl silicone polymers, 0.5 part of DTAC, 8 parts gather
Ethylene glycol, 0.3 part of isooctyl acid bismuth, 1.0g dibutyl tin laurates and 30 parts of mass fractions are 75% ethanol solution, are added to
In beaker, and beaker is heated to after 70 DEG C, stirring reaction 50min, stops heating, treat that it naturally cools to room temperature, you can
To moistureproof quick-dry type Cypres.
This example operation is easy, is made in use, first adding 50L moistureproof quick-dry type Cypres produced by the present invention
In paper machine feed barrel, later on paper machine carries out paper technology, and when not dried after sheet formation, paper surface is glued
Technique, it is 90 DEG C to control applying glue temperature, and resin added is 2.8kg/t paper, finally treats that applying glue is completed, paper sheet delivery to paper machine is dried
Dried at position.After testing, sizing agent retention produced by the present invention is up to 99.8%, and service efficiency is high, paper after applying glue
The tensile strength opened reaches 9kN/m, and folding strength is up to 90 times, and paper ring crush index is 8.6Nm/g, and the bursting strength of paper reaches
700kPa, while sizing agent of the present invention has carries out experiment of dripping on preferably moistureproof, water resistance, the paper after applying glue,
5h does not have water to penetrate into paper, and sizing agent rate of drying of the present invention is very fast, and the drying time of paper is applied compared with using tradition after applying glue
Jelly shortens 2 times.
Claims (1)
1. a kind of preparation method of moistureproof quick-dry type Cypres, it is characterised in that specifically preparation process is：
(1) 30~40g chitosans are weighed and are added to the beaker for filling that 200~300mL mass fractions are 10% sodium hydroxide solution
In, and be heated to 70~80 DEG C, immersion is swelled after 4~5h, obtains the chitosan gel rubber that alkalizes, will alkalization chitosan gel rubber be placed in
In three-necked flask with thermometer and reflux, flask is placed in ice-water bath, control temperature is at 0~5 DEG C, then to flask
25~30mL of middle dropwise addition mass fractions are 25% chloroacetic acid solution, and it is 5~8mL/min to control drop rate, treats completion of dropping, stirs
2~3h of reaction is mixed, reaction terminates, collect product and be placed in suction filtration in Buchner funnel, collect filter cake, be 75% second with mass fraction
Alcoholic solution washing filter cake 3~5 times, carboxymethyl chitosan is obtained after drying, standby；
(2) 5~8g stearic acid, 1~3g silane resin acceptor kh-550s and 0.3~0.5gN- HOSu NHSs is weighed to be added to
In the beaker for filling 80~100mL absolute ethyl alcohols, stirring 15~20min of mixing obtains mixed liquor；
(3) carboxymethyl chitosan for taking 15~20g steps (1) standby is added in the flask for filling 200~300mL water, will be burnt
Bottle is placed in water-bath, and the above-mentioned mixed liquors of 25~30mL are added dropwise at 25~30 DEG C, then into flask in control temperature, controls that speed is added dropwise
Spend for 8~10mL/min, after completion of dropping, be warming up to 80~90 DEG C, 5~6h of stirring reaction, reaction terminates, collect product, and
It is placed in Rotary Evaporators, concentrated by rotary evaporation obtains concentrate to the 1/5 of product original volume；
(4) count by weight, weigh 35~45 portions of above-mentioned concentrates, 3~5 parts of dimethyl silicone polymers, 0.3~0.5 part ten
Dialkyl group trimethyl ammonium chloride, 5~8 parts of polyethylene glycol, 0.1~0.3 part of isooctyl acid bismuth, 0.8~1.0g di lauric dibutyls
Tin and 25~30 parts of mass fractions are 75% ethanol solution, are added in beaker, and are heated to 60~70 DEG C to beaker, and stirring is anti-
Answer after 40~50min, stop heating, treat that it naturally cools to room temperature, you can obtain moistureproof quick-dry type Cypres.
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| CN201710190863.3A CN107034730A (en) | 2017-03-28 | 2017-03-28 | A kind of preparation method of moistureproof quick-dry type Cypres |
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| CN201710190863.3A CN107034730A (en) | 2017-03-28 | 2017-03-28 | A kind of preparation method of moistureproof quick-dry type Cypres |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835821A (en) * | 2016-12-09 | 2017-06-13 | 苏州艾博迈尔新材料有限公司 | A kind of paper composite fortifier and preparation method thereof |
| CN112060675A (en) * | 2020-10-13 | 2020-12-11 | 常熟荣亿包装材料有限公司 | Antiskid waterproof paper slip tray |
| CN117886968A (en) * | 2024-03-18 | 2024-04-16 | 烟台万利医用品有限公司 | Preparation process of carboxymethyl chitosan and carboxymethyl chitosan gel |
-
2017
- 2017-03-28 CN CN201710190863.3A patent/CN107034730A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835821A (en) * | 2016-12-09 | 2017-06-13 | 苏州艾博迈尔新材料有限公司 | A kind of paper composite fortifier and preparation method thereof |
| CN112060675A (en) * | 2020-10-13 | 2020-12-11 | 常熟荣亿包装材料有限公司 | Antiskid waterproof paper slip tray |
| CN117886968A (en) * | 2024-03-18 | 2024-04-16 | 烟台万利医用品有限公司 | Preparation process of carboxymethyl chitosan and carboxymethyl chitosan gel |
| CN117886968B (en) * | 2024-03-18 | 2024-05-28 | 烟台万利医用品有限公司 | Preparation process of carboxymethyl chitosan and carboxymethyl chitosan gel |
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