AU2021103705A4 - Preparation method for preparing heat-sealable filter base paper - Google Patents
Preparation method for preparing heat-sealable filter base paper Download PDFInfo
- Publication number
- AU2021103705A4 AU2021103705A4 AU2021103705A AU2021103705A AU2021103705A4 AU 2021103705 A4 AU2021103705 A4 AU 2021103705A4 AU 2021103705 A AU2021103705 A AU 2021103705A AU 2021103705 A AU2021103705 A AU 2021103705A AU 2021103705 A4 AU2021103705 A4 AU 2021103705A4
- Authority
- AU
- Australia
- Prior art keywords
- heat
- pulp
- sealing
- suspension
- dispersing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000002360 preparation method Methods 0.000 title description 4
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000001913 cellulose Substances 0.000 claims abstract description 17
- 229920002678 cellulose Polymers 0.000 claims abstract description 17
- 239000000725 suspension Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 239000003513 alkali Substances 0.000 claims abstract description 12
- 239000002585 base Substances 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- 239000012266 salt solution Substances 0.000 claims abstract description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 8
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 239000011122 softwood Substances 0.000 claims description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 238000009864 tensile test Methods 0.000 claims description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- KDOKFXJQGPCGLT-UHFFFAOYSA-N 2-hydroxyethyl-dimethyl-octadecylazanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)CCO KDOKFXJQGPCGLT-UHFFFAOYSA-N 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 241000209140 Triticum Species 0.000 claims description 2
- 235000021307 Triticum Nutrition 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 239000000908 ammonium hydroxide Substances 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- PSLWZOIUBRXAQW-UHFFFAOYSA-M dimethyl(dioctadecyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC PSLWZOIUBRXAQW-UHFFFAOYSA-M 0.000 claims description 2
- 239000011121 hardwood Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002906 medical waste Substances 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/18—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with itself, or other added substances, e.g. by grafting on the fibres
-
- 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
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
A method for preparing a heat-sealable filter base paper includes: dissociating and
dispersing commercial pulp cellulose, then adjusting the pH to 8 with alkali liquor, then
adding epichlorohydrin accounting for 0.5-lwt% of the absolute dry mass of pulp cellulose,
stirring and reacting for 1-2 h at a certain temperature wherein alkali liquor is continuously
added to increase the pH during stirring, and then removing unreacted reagents by
centrifugal washing; dissociating and dispersing the obtained modified fibers, then adding an
ammonium salt solution accounting for 1-2wt% of the absolute dry mass of pulp cellulose
into the suspension, stirring and reacting for 1-3 h at a certain temperature, and then
removing the unreacted reagents by centrifugal washing to obtain ammoniated modified
fiber suspension; selecting different types of soft and hard acrylic monomers, mixing and
dispersing the acrylic monomers in a solvent according to different proportions, then adding
the ammoniated modified fibers into the mixed solution to be dispersed uniformly, then
adding a certain amount of initiator to be stirred and reacted at 80-100°C for 1-3 h, and then
centrifugally washing the obtained suspension fully to remove the unreacted reagents; and
preparing the modified fibers into paper sheets with different basis weights by using a
handsheet former in the laboratory, heat-sealing the paper sheets at heat-sealing temperature
of 150°C for heat-sealing time of 1 s, and then testing the heat sealability.
Description
[0001] The present disclosure belongs to the technical field of novel materials, and particularly relates to a method for preparing heat-sealable filter base paper.
[0002] With the decline of air quality and the outbreak of epidemic viruses, people have gradually increased awareness of physical security and healthy travel, so that masks have become a necessity for people to travel. At present, most masks produced worldwide are mainly made of non-woven fabrics and melt-blown fabrics as main raw materials. However, the melt-blown fabrics as a core filter material are plastic materials; and the discarded medical wastes cannot be degraded, thereby causing huge pressure on the environment. Future public health security emergencies can be dealt with calmly only by increasing the investment in research and development of medical protective equipment and promoting the breakthrough and innovation of traditional products such as the masks. The previous understanding for such products needs to be changed in the breakthrough and innovation of the mask products.
[0003] If the degradable natural plant fiber material is used for replacing a filter interlayer of the mask through product innovation, the generation of massive medical wastes caused by the use of massive disposable masks, the great harm to the environment and possible secondary pollution can be avoided. It is necessary to establish the concept of green production, environmental protection and carbon reduction, and promote the sustainable development of mask industry. However, heat sealing is an essential step in the process of preparing the masks, so the materials are required to have excellent heat sealability.
[0004] To solve the problem that plant fibers cannot be heat-sealed, polymer resin with heat sealability is grafted on surfaces of the plant fibers through specific functional modification in the present disclosure, thereby endowing the plant fibers with excellent heat sealability, so that the heat-sealable filter base paper based on natural plant fibers is prepared. At present, such a technology is rarely reported.
[0005] To overcome the disadvantages and deficiencies of the existing materials and technologies, the primary purpose of the present disclosure is to provide heat-sealable filter base paper based on natural plant fibers and a preparation method thereof, to solve the problems that the existing materials are not degradable, and the alternative materials are not heat-sealable and unstable in performance. To achieve the above purpose, the present disclosure provides the following technical solution:
[0006] The purpose of the present disclosure is achieved by the following solution:
[0007] the preparation method of the heat-sealable filter base paper based on natural plant fibers includes the following steps:
[0008] (1) dissociating and dispersing different types of commercial pulp cellulose sold in the market to have a certain pulp consistency, then adjusting the pH to 8 with alkali liquor, then adding epichlorohydrin accounting for 0.5-1wt% of the absolute dry mass of pulp cellulose, stirring and reacting for 1-2 h at a certain temperature wherein alkali liquor is continuously added to increase the pH during stirring, and then removing unreacted reagents by centrifugal washing;
[0009] (2) dissociating and dispersing the modified fibers obtained in the step (1) to have a certain pulp consistency, then adding an ammonium salt solution accounting for 1-2wt% of the absolute dry mass of pulp cellulose into the suspension, stirring and reacting for 1-3 h at a certain temperature, and then removing the unreacted reagents by centrifugal washing to obtain ammoniated modified fiber suspension;
[0010] (3) selecting different types of soft and hard acrylic monomers, mixing and dispersing the acrylic monomers in a solvent according to different proportions, then adding the ammoniated modified fibers into the mixed solution to be dispersed uniformly, then adding a certain amount of initiator to be stirred and reacted at -100°C for 1-3 h, and then centrifugally washing the obtained suspension fully to remove the unreacted reagents; and
[0011] (4) preparing the modified fibers into paper sheets with different basis weights by using a handsheet former in the laboratory, heat-sealing the paper sheets at heat-sealing temperature of 150°C for heat-sealing time of 1 s, and then selecting specimens with clear outline edges to test the heat sealability on an intelligent electronic tensile testing machine XLW-200 N, setting an initial spacing to be 80 mm and a moving speed of a fixture to be 200 mm/min, making 10 parallel tests for each specimen, and taking the middle 8 of all data to calculate the average value of heat-sealing strength, wherein the heat-sealing strength (force per unit width), in N/m, is calculated according to formula (1): F B = -(1). b
[0012] In the formula, B refers to the heat-sealing strength (N/m); F refers to the value of force (N); and b refers to the width (m).
[0013] In the step (1), the commercial pulp cellulose is softwood pulp, hardwood pulp, wheat straw pulp, bamboo pulp and pulp cellulose prepared by physical and chemical methods with natural fibers as raw materials, which are easily available in the field of pulping and papermaking, preferably softwood pulp.
[0014] The pulp suspension has a concentration of 1-5%, preferably 2%.
[0015] The alkali liquor is a common alkaline solution, preferably NaOH.
[0016] The dosage of epichlorohydrin is preferably 0.5wt%.
[0017] The reaction temperature is preferably 60°C.
[0018] The reaction time is preferably 2 h.
[0019] In the step (2), the pulp suspension has a concentration of 1-5%, preferably 2%.
[0020] The ammonium salt is at least one of ammonium hydroxide, ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, dimethyldioctadecyl ammonium bromide and octadecyl dimethyl hydroxyethyl ammonium; the dosage of the ammonium salt is preferably lwt%.
[0021] The reaction temperature is preferably 60°C.
[0022] The reaction time is preferably 2 h.
[0023] In the step (3), the acrylic monomer is at least one of methacrylic acid, styrene, butyl acrylate and methyl methacrylate; the ratio of the soft monomer to the hard monomer is preferably 2: 8.
[0024] The solvent is a commonly used polymer solvent such as toluene or butyl acetate, preferably butyl acetate.
[0025] The initiator is a commonly used initiator such as azobisisobutyronitrile (AIBN) and dibenzoyl peroxide (BPO), preferably BPO; the dosage of the initiator is preferably 0.2%.
[0026] The reaction temperature is preferably 100°C;
[0027] The reaction time is preferably 2 h.
[0028] According to the present disclosure, the natural plant fibers are subjected to amino modification treatment, and the thermoplastic polymer resin is further grafted on the surfaces of fibers, so that the heat-sealable filter base paper based on the natural plant fibers is prepared, thereby solving the problem that the plant fibers cannot be heat-sealed.
[0029] Compared with the prior art, the present disclosure has the following advantages and beneficial effects:
[0030] The production efficiency of the heat-sealable filter base paper can be increased obviously by using the preparing method.
[0031] The present disclosure will be further described in detail below in combination with embodiments, but the embodiments of the present disclosure are not limited thereto.
[0032] The materials involved in the following embodiments are all available from 2 commercial channels. The basis weight of all filter base paper is set as 15 g/m
. Embodiment 1
[0033] The present embodiment comprises: accurately weighing 10 g of absolutely dry softwood pulp fibers to be dissociated and dispersed, adjusting the pulp consistency to 2%, then adjusting the pH to 8 with alkali liquor, then adding epichlorohydrin accounting for 0.5% of the absolute dry mass of pulp cellulose, stirring and reacting at 60°C for 1 h wherein alkali liquor is continuously added to increase the pH during stirring, and then removing unreacted reagents by centrifugal washing; dissociating and dispersing the modified fibers to have a pulp consistency of 2%, then adding an ammonium chloride solution accounting for lwt% of the absolute dry mass of pulp cellulose, stirring and reacting at 60°C for 1 h, and then removing unreacted reagents by centrifugal washing to obtain ammoniated modified fiber suspension.
[0034] Selecting methacrylic acid and butyl acrylate as monomers to be mixed and dispersed in a solvent at a ratio of 2: 8, then adding the ammoniated modified fibers into the mixed solution to be dispersed uniformly, then adding 0.2% of BPO to be stirred and reacted at 80°C for 1 h, centrifugally washing the obtained suspension fully to remove the unreacted reagents. Finally, preparing the modified fibers into paper sheets with different basis weights by using a handsheet former in the laboratory, heat-sealing the paper sheets at heat-sealing temperature of 150°C for heat-sealing time of 1 s, and then selecting specimens with clear outline edges to test the heat sealability on an intelligent electronic tensile testing machine XLW-200N, wherein the heat-sealing strength of base paper measured in the experiment is 252 N/m. Embodiment 2
[0035] The present embodiment comprises: accurately weighing 10 g of absolutely dry softwood pulp fibers to be dissociated and dispersed, adjusting the pulp consistency to 2%, then adjusting the pH to 8 with alkali liquor, then adding epichlorohydrin accounting for 1% of the absolute dry mass of pulp cellulose, stirring and reacting at 60°C for 2 h wherein alkali liquor is continuously added to increase the pH during stirring, and then removing unreacted reagents by centrifugal washing; dissociating and dispersing the modified fibers to have a pulp consistency of 2%, then adding a dodecyl dimethyl benzyl ammonium chloride solution accounting for 2wt% of the absolute dry mass of pulp cellulose, stirring and reacting at 60°C for 3 h, and then removing unreacted reagents by centrifugal washing to obtain ammoniated modified fiber suspension.
[0036] Selecting methacrylic acid and methyl acrylate as monomers to be mixed and dispersed in a solvent at a ratio of 2: 8, then adding the ammoniated modified fibers into the mixed solution to be dispersed uniformly, then adding 0.2% of BPO to be stirred and reacted at 100°C for 3 h, centrifugally washing the obtained suspension fully to remove the unreacted reagents. Finally, preparing the modified fibers into paper sheets with different basis weights by using a handsheet former in the laboratory, heat-sealing the paper sheets at heat-sealing temperature of 150°C for heat-sealing time of 1 s, and then selecting specimens with clear outline edges to test the heat sealability on an intelligent electronic tensile testing machine XLW-200N, wherein the heat-sealing strength of base paper measured in the experiment is 321 N/m.
[0037] The above embodiments are only preferred embodiments of the present disclosure, and are not intended as a limit to the embodiments of the present disclosure. Any other changes, modifications, substitutions, combinations and simplifications made without departing from the spirits and principles of the present disclosure shall be considered as equivalent substitutions and fall within the protection scope of the present disclosure.
Claims (10)
- CLAIMS: 1. A method for preparing a heat-sealable filter base paper, comprising the following steps: (1) dissociating and dispersing different types of pulp cellulose to have a certain pulp consistency, then adjusting the pH to 8 with alkali liquor, then adding epichlorohydrin accounting for 0.5-lwt% of the absolute dry mass of pulp cellulose, stirring and reacting for 1-2 h at a certain temperature wherein alkali liquor is continuously added to increase the pH during stirring, and then removing unreacted reagents by centrifugal washing; (2) dissociating and dispersing the modified fibers obtained in the step (1) to have a certain pulp consistency, then adding an ammonium salt solution accounting for 1-2wt% of the absolute dry mass of pulp cellulose into the suspension, stirring and reacting for 1-3 h at a certain temperature, and then removing the unreacted reagents by centrifugal washing to obtain ammoniated modified fiber suspension; (3) selecting different types of soft and hard acrylic monomers, mixing and dispersing the acrylic monomers in a solvent according to different proportions, then adding the ammoniated modified fibers into the mixed solution to be dispersed uniformly, then adding a certain amount of initiator to be stirred and reacted at -100°C for 1-3 h, and then centrifugally washing the obtained suspension fully to remove the unreacted reagents; and (4) preparing the modified fibers into paper sheets with different basis weights by using a handsheet former in the laboratory, heat-sealing the paper sheets at heat-sealing temperature of 150°C for heat-sealing time of 1 s, and then selecting specimens with clear outline edges to test the heat sealability on an intelligent electronic tensile testing machine XLW-200 N, setting an initial spacing to be 80 mm and a moving speed of a fixture to be 200 mm/min, making 10 parallel tests for each specimen, and taking the middle 8 of all data to calculate the average value of heat-sealing strength, wherein the heat-sealing strength (force per unit width), in N/m, is calculated according to formula (1): F B = -(1) b wherein B refers to the heat-sealing strength (N/m); F refers to the value of force (N); and b refers to the width (in).
- 2. The method according to claim 1, wherein in the step (1), the pulp cellulose is softwood pulp, hardwood pulp, wheat straw pulp, bamboo pulp and pulp cellulose prepared by physical and chemical methods with natural fibers as raw materials, which are easily available in the field of pulping and papermaking, preferably softwood pulp.
- 3. The method according to claim 1, wherein in the step (1), the pulp suspension has a concentration of 1-5%; and in the step (2), the pulp suspension has a concentration of 1-5%.
- 4. The method according to claim 1, wherein in the step (1), the alkali liquor is a common alkaline solution; and in the step (1), the dosage of epichlorohydrin is 0.5wt%.
- 5. The method according to claim 1, wherein in the step (1), the reaction temperature is 60°C; in the step (2), the reaction temperature is 60°C; and in the step (3), the reaction temperature is 100°C.
- 6. The method according to claim 1, wherein in the step (1), the reaction time is 2 h; in the step (2), the reaction time is 2 h; and in the step (3), the reaction time is 2 h.
- 7. The method according to claim 1, wherein in the step (2), the ammonium salt is at least one of ammonium hydroxide, ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, dimethyldioctadecyl ammonium bromide and octadecyl dimethyl hydroxyethyl ammonium; and the dosage of the ammonium salt is lwt%.
- 8. The method according to claim 1, wherein in the step (3), the acrylic monomer is at least one of methacrylic acid, styrene, butyl acrylate and methyl methacrylate; and the ratio of the soft monomer to the hard monomer is 2: 8.
- 9. The method according to claim 1, wherein in the step (3), the solvent is a commonly used polymer solvent such as toluene or butyl acetate.
- 10. The method according to claim 1, wherein in the step (3), the initiator is a commonly used initiator such as azobisisobutyronitrile (AIBN) and dibenzoyl peroxide (BPO), and the dosage of the initiator is 0.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103705A AU2021103705A4 (en) | 2021-06-29 | 2021-06-29 | Preparation method for preparing heat-sealable filter base paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103705A AU2021103705A4 (en) | 2021-06-29 | 2021-06-29 | Preparation method for preparing heat-sealable filter base paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021103705A4 true AU2021103705A4 (en) | 2021-08-19 |
Family
ID=77274311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021103705A Ceased AU2021103705A4 (en) | 2021-06-29 | 2021-06-29 | Preparation method for preparing heat-sealable filter base paper |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021103705A4 (en) |
-
2021
- 2021-06-29 AU AU2021103705A patent/AU2021103705A4/en not_active Ceased
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102115998B (en) | Dry strengthening agent used for making papers and preparation method and application thereof | |
| AU2007293922B2 (en) | Glyoxalation of vinylamide polymer | |
| CN103987746B (en) | The preparation of polyvinylamide cellulose reactive addition product | |
| CN103788315B (en) | A kind of preparation method of both sexes water-in-oil inverse emulsion | |
| CN103554348A (en) | Polymer and preparation method and application thereof | |
| US20220186015A1 (en) | Method of producing resin modifier, resin modifier, and composite material | |
| CN112252084B (en) | Heat-sealable filter base paper based on natural plant fibers and preparation method thereof | |
| CN108368208A (en) | The preparation method of aqueous polymer dispersion | |
| CN111676728B (en) | Natural-color high-stiffness high-water-resistance raw paper for straw and preparation method thereof | |
| CN112662346B (en) | Glue for masking tape and preparation method thereof | |
| CN105985601A (en) | Polymethyl methacrylate-carboxylated carbon nanotube composite based on charge conjugation synergism and preparation method thereof | |
| AU2021103705A4 (en) | Preparation method for preparing heat-sealable filter base paper | |
| CN104628946A (en) | Dry strength agent for coated paper and preparation method of dry strength agent | |
| CN113754830A (en) | Hydrogel with wet-state adhesion performance and preparation method and application thereof | |
| CN106351063A (en) | Dispersed copolymer of organic boron composite crosslinking agent and cationic polymer, and preparation method thereof and application, papermaking method | |
| GB1007941A (en) | Preparation of hydrolyzed graft polymer | |
| KR20180022698A (en) | Method for producing a material having a network of at least two polymers, use of the product and product | |
| CN108642959A (en) | A kind of lignin Cypres and preparation method thereof | |
| CN103643591B (en) | There is the dry strength of enhancing and the paper of wet strength | |
| CN103254347A (en) | Preparation and application of emulsion type reinforcing agent for case board paper | |
| CN113493665B (en) | Palm oil-based underwater adhesive and preparation method thereof | |
| DE69003972T2 (en) | Process for making paper. | |
| CN110029526B (en) | Paper dry strength agent, preparation method and application thereof | |
| CN107383266A (en) | A kind of reinforcing agent preparation method for carton | |
| CN114263065B (en) | Interlayer reinforcing agent for papermaking, raw material composition thereof and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |