CN112647363A - Impregnating resin, impregnating film paper and laminate flooring - Google Patents
Impregnating resin, impregnating film paper and laminate flooring Download PDFInfo
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- CN112647363A CN112647363A CN202011452825.9A CN202011452825A CN112647363A CN 112647363 A CN112647363 A CN 112647363A CN 202011452825 A CN202011452825 A CN 202011452825A CN 112647363 A CN112647363 A CN 112647363A
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- Prior art keywords
- formaldehyde
- impregnated
- paper
- impregnating
- resin
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- 229920005989 resin Polymers 0.000 title claims abstract description 52
- 239000011347 resin Substances 0.000 title claims abstract description 52
- 238000009408 flooring Methods 0.000 title claims description 24
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 156
- 239000002516 radical scavenger Substances 0.000 claims abstract description 20
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004202 carbamide Substances 0.000 claims abstract description 18
- 229920001661 Chitosan Polymers 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000003094 microcapsule Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000123 paper Substances 0.000 claims description 92
- 238000003756 stirring Methods 0.000 claims description 22
- 239000011094 fiberboard Substances 0.000 claims description 21
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 11
- 235000010413 sodium alginate Nutrition 0.000 claims description 11
- 239000000661 sodium alginate Substances 0.000 claims description 11
- 229940005550 sodium alginate Drugs 0.000 claims description 11
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 8
- 238000007731 hot pressing Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 3
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000003495 polar organic solvent Substances 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 12
- 238000000465 moulding Methods 0.000 description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 239000011162 core material Substances 0.000 description 7
- 239000003292 glue Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920001187 thermosetting polymer 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
- D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
- D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
- D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/30—Alginic acid or alginates
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/51—Triazines, e.g. melamine
-
- 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
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- 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
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- 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
-
- 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
- D21H21/50—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 form
- D21H21/52—Additives of definite length or shape
- D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
- E04F15/102—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of fibrous or chipped materials, e.g. bonded with synthetic resins
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
- E04F15/107—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials composed of several layers, e.g. sandwich panels
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Floor Finish (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides an impregnating resin, an impregnating film paper and a reinforced floor, wherein the impregnating resin comprises the following raw materials in parts by weight: 100 parts of melamine formaldehyde resin, 3-8 parts of formaldehyde catching agent and 0.5-1 part of curing agent; wherein the formaldehyde scavenger is a microcapsule comprising a shell of chitosan and a core of urea. According to the impregnated resin, the impregnated film paper and the reinforced floor provided by the invention, the formaldehyde scavenger is added into the impregnated resin, so that the formaldehyde emission is effectively reduced.
Description
Technical Field
The invention relates to the technical field of laminate flooring, in particular to impregnating resin, impregnating film paper and laminate flooring.
Background
The reinforced floor is also called impregnated paper laminated wood floor, which is composed of a wear-resistant layer, a decorative layer, a high-density substrate layer and a balance (moisture-proof) layer, and is essentially a floor formed by impregnating one or more layers of special paper with thermosetting amino resin, paving on the surface layer of artificial board substrates such as shaving boards, high-density fiber boards and the like, adding the balance layer on the back side, adding the wear-resistant layer on the front side and carrying out hot pressing and forming.
The issue of free formaldehyde emission from laminate flooring has long been a significant concern for consumers. When the reinforced floor is used indoors, most of formaldehyde emission comes from floor base materials and impregnated bond paper. The laminate wood flooring made of the formaldehyde adhesive has the problem of normal formaldehyde release under a normal temperature drying state, and also has the problem of increased formaldehyde release under high temperature and high humidity states, because the hydrolysis and fracture of the rubber molecular chains in the board can be accelerated under the high temperature and high humidity conditions, so that the formaldehyde release of the flooring is increased.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an impregnating resin, an impregnating film paper and a reinforced floor, wherein a formaldehyde scavenger is added into the impregnating resin, so that the formaldehyde emission is effectively reduced.
The invention provides impregnating resin which comprises the following raw materials in parts by weight: 100 parts of melamine formaldehyde resin, 3-8 parts of formaldehyde catching agent and 0.5-1 part of curing agent;
wherein the formaldehyde scavenger is a microcapsule comprising a shell of chitosan and a core of urea.
Preferably, the formaldehyde catching agent is prepared by adopting the following method:
dissolving sodium alginate and chitosan in water to obtain a continuous phase, and dispersing urea in a non-polar organic solvent to obtain a dispersed phase; and adding the dispersed phase into the continuous phase, adding a calcium chloride cross-linking agent, and stirring for reaction to obtain the formaldehyde scavenger.
Preferably, the weight ratio of the sodium alginate to the chitosan is 1:0.5-2, the weight ratio of the sodium alginate to the urea is 1:2-5, and the weight ratio of the sodium alginate to the calcium chloride is 1: 0.5-2.
Preferably, the melamine formaldehyde resin is a melamine formaldehyde resin having a solids content of 53-58 wt%.
Preferably, the curing agent is at least one of triethanolamine or hexamethylenetetramine.
Preferably, the impregnating resin is obtained by uniformly mixing melamine formaldehyde resin, a formaldehyde scavenger and a curing agent and then carrying out a pre-curing reaction;
preferably, the temperature of the pre-curing reaction is 50-60 ℃ and the time is 1-3 min.
The invention provides impregnated film paper which is prepared by impregnating base paper with the impregnating resin and drying.
Preferably, the base paper is at least one of a decorative base paper, an abrasion-resistant base paper or a balance base paper.
The invention provides a laminate flooring, which is prepared by stacking and hot-pressing a high-density fiberboard and the impregnated film paper.
Preferably, the formaldehyde emission of the high-density fiberboard is not more than 12mg/100 g.
The impregnating resin provided by the invention is prepared by mixing a formaldehyde catching agent and melamine formaldehyde resin, wherein the formaldehyde catching agent takes sodium alginate-chitosan as a wall material, urea as a core material and calcium chloride as a cross-linking agent, and urea is embedded in a space network structure formed by micro-crosslinking of the sodium alginate-chitosan, so that the microcapsule formaldehyde catching agent with good sealing performance and a space network structure on the surface is formed.
On one hand, fine holes and gaps exist in a network structure on the surface of the microcapsule-type formaldehyde catching agent, so that urea in the core material can better react with free formaldehyde to reduce the concentration of the free formaldehyde in the floor, and the coated core material urea is released slowly and durably through the small holes and the gaps, so that the effect of durably reducing the formaldehyde can be achieved.
On the other hand, the wall material of the microcapsule-type formaldehyde scavenger contains chitosan, and the chitosan molecule contains a large amount of hydroxyl, so that the microcapsule-type formaldehyde scavenger can form condensation polymerization with melamine formaldehyde resin when being mixed with the melamine formaldehyde resin, so that the microcapsule-type formaldehyde scavenger can be well dispersed in the melamine formaldehyde, layering cannot be generated, and the formaldehyde reducing effect of the microcapsule-type formaldehyde scavenger can be more effectively exerted.
Finally, the comprehensive quality of the laminate flooring product obtained by the impregnating resin meets the requirements of GB/T18102-2007 standard, the formaldehyde emission thereof overcomes the defects in the prior art, and the laminate flooring with the formaldehyde emission less than or equal to 0.3mg/L can be prepared by using the high-density fiberboard with high formaldehyde emission, and is stable, reliable and free of rebound phenomenon.
Detailed Description
Hereinafter, the technical solution of the present invention will be described in detail by specific examples, but these examples should be explicitly proposed for illustration, but should not be construed as limiting the scope of the present invention.
Example 1
A laminate flooring, the method of making comprising:
(1) preparation of impregnating resins
Adding 10 parts by weight of sodium alginate and 10 parts by weight of chitosan into water, and stirring in a constant-temperature water bath at 60 ℃ for 40min until the system is uniformly dispersed to obtain a continuous phase solution; adding 30 parts of urea into dichloromethane, and stirring at a high speed (1000r/min) for 1h until the system is uniformly dispersed to obtain a dispersed phase solution; slowly adding the dispersion phase solution into the continuous phase solution under the stirring condition, dispersing at a high speed (1000r/min) for 20min, adding 50 parts of calcium chloride solution (20 wt%) under the stirring condition, heating to 40 ℃, stirring and reacting for 4h, cooling to room temperature, filtering, washing, and vacuum drying at 60 ℃ overnight to obtain microcapsules comprising a shell of chitosan and a core of urea, namely the formaldehyde scavenger;
mixing 100 parts of melamine-formaldehyde resin (with the solid content of 55 wt%), 6 parts of formaldehyde scavenger and 0.8 part of triethanolamine according to the parts by weight, uniformly stirring, and curing and reacting at 60 ℃ for 2min to obtain the impregnating resin;
(2) preparation of impregnated paper
Preparing the impregnated decorative paper: after the decorative base paper is impregnated and dried by the impregnating resin, the back surface of the decorative base paper is coated and dried for at least one time by the impregnating resin, the impregnation amount of the obtained impregnated decorative paper is 122 percent, the volatile matter content is 7.8 percent by weight, the pre-curing degree is 29 percent, and the thickness of a back surface dry glue layer is 0.03 mm;
preparing impregnated wear-resistant paper: after the wear-resistant base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated wear-resistant paper is 165%, the volatile matter content is 6.3 wt%, and the pre-curing degree is 42%;
preparing impregnated balance paper: after the balance base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated balance paper is 136%, the volatile matter content is 7.6 wt%, and the pre-curing degree is 34%;
(3) preparation of laminate flooring
And combining a high-density fiberboard (the formaldehyde emission is 6mg/100g) on the impregnated balance paper, sequentially laying the impregnated decorative paper and the impregnated wear-resistant paper on the high-density fiberboard, feeding the high-density fiberboard into a hot press for molding, performing hot pressing for 41 seconds under the conditions that the temperature is 195 ℃ and the pressure is 4MPa, molding, and performing slitting, curing balance and slotting to obtain the reinforced floor.
Example 2
A laminate flooring, the method of making comprising:
(1) preparation of impregnating resins
Adding 10 parts of sodium alginate and 5 parts of chitosan into water according to the parts by weight, and stirring in a constant-temperature water bath at 60 ℃ for 40min until the system is uniformly dispersed to obtain a continuous phase solution; adding 20 parts of urea into dichloromethane, and stirring at a high speed (1000r/min) for 1h until the system is uniformly dispersed to obtain a dispersed phase solution; slowly adding the dispersion phase solution into the continuous phase solution under the stirring condition, dispersing at a high speed (1000r/min) for 20min, adding 25 parts of calcium chloride solution (20 wt%) under the stirring condition, heating to 40 ℃, stirring and reacting for 4h, cooling to room temperature, filtering, washing, and vacuum drying at 60 ℃ overnight to obtain microcapsules comprising a shell of chitosan and a core of urea, namely the formaldehyde scavenger;
mixing 100 parts by weight of melamine-formaldehyde resin (with a solid content of 55 wt%), 3 parts by weight of formaldehyde scavenger and 0.5 part by weight of hexamethylenetetramine, uniformly stirring, and curing at 50 ℃ for 1min to obtain the impregnating resin;
(2) preparation of impregnated paper
Preparing the impregnated decorative paper: after the decorative base paper is impregnated and dried by the impregnating resin, the back surface of the decorative base paper is coated and dried for at least one time by the impregnating resin, the impregnation amount of the obtained impregnated decorative paper is 130 percent, the volatile matter content is 7.6 percent by weight, the pre-curing degree is 33 percent, and the thickness of a back surface dry glue layer is 0.03 mm;
preparing impregnated wear-resistant paper: after the wear-resistant base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated wear-resistant paper is 168%, the volatile matter content is 7.0 wt%, and the pre-curing degree is 38%;
preparing impregnated balance paper: after the balance base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated balance paper is 142%, the volatile matter content is 7.2 wt%, and the pre-curing degree is 33%;
(3) preparation of laminate flooring
And combining a high-density fiberboard (the formaldehyde emission is 6mg/100mg) on the impregnated balance paper, sequentially laying the impregnated decorative paper and the impregnated wear-resistant paper on the high-density fiberboard, feeding the high-density fiberboard into a hot press for molding, performing hot pressing for 38 seconds under the conditions that the temperature is 195 ℃ and the pressure is 4MPa, performing molding, and performing slitting, curing balance and slotting to obtain the strengthened floor.
Example 3
A laminate flooring, the method of making comprising:
(1) preparation of impregnating resins
Adding 10 parts by weight of sodium alginate and 20 parts by weight of chitosan into water, and stirring in a constant-temperature water bath at 60 ℃ for 40min until the system is uniformly dispersed to obtain a continuous phase solution; adding 50 parts of urea into dichloromethane, and stirring at a high speed (1000r/min) for 1h until the system is uniformly dispersed to obtain a dispersed phase solution; slowly adding the dispersion phase solution into the continuous phase solution under the stirring condition, dispersing for 20min at a high speed (1000r/min), adding 100 parts of calcium chloride solution (20 wt%) under the stirring condition, heating to 40 ℃, stirring and reacting for 4h, cooling to room temperature, filtering, washing, and vacuum drying at 60 ℃ overnight to obtain microcapsules comprising a shell of chitosan and a core of urea, namely the formaldehyde scavenger;
mixing 100 parts of melamine-formaldehyde resin (with the solid content of 55 wt%), 8 parts of formaldehyde scavenger and 1 part of triethanolamine according to the parts by weight, uniformly stirring, and curing and reacting for 3min at 60 ℃ to obtain the impregnating resin;
(2) preparation of impregnated paper
Preparing the impregnated decorative paper: after the decorative base paper is impregnated and dried by the impregnating resin, the back of the decorative base paper is coated and dried for at least one time by the impregnating resin, the impregnation amount of the obtained impregnated decorative paper is 137%, the volatile matter content is 8.0 wt%, the pre-curing degree is 35%, and the thickness of a back dry glue layer is 0.03 mm;
preparing impregnated wear-resistant paper: after the wear-resistant base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated wear-resistant paper is 158%, the volatile matter content is 7.9 wt%, and the pre-curing degree is 45%;
preparing impregnated balance paper: after the balance base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated balance paper is 130 percent, the volatile matter content is 7.8 percent by weight, and the pre-curing degree is 39 percent;
(3) preparation of laminate flooring
And combining a high-density fiberboard (the formaldehyde emission is 6mg/100g) on the impregnated balance paper, sequentially laying the impregnated decorative paper and the impregnated wear-resistant paper on the high-density fiberboard, feeding the high-density fiberboard into a hot press for molding, performing hot pressing for 43 seconds under the conditions that the temperature is 195 ℃ and the pressure is 4MPa, performing molding, and performing slitting, curing balance and slotting to obtain the reinforced floor.
Comparative example 1
A laminate flooring, the method of making comprising:
(1) preparation of impregnating resins
Mixing 100 parts of melamine formaldehyde resin (with the solid content of 55 wt%) and 0.8 part of triethanolamine according to the parts by weight, uniformly stirring, and carrying out curing reaction at 60 ℃ for 2min to obtain the impregnating resin;
(2) preparation of impregnated paper
Preparing the impregnated decorative paper: after the decorative base paper is impregnated and dried by the impregnating resin, the back surface of the decorative base paper is coated and dried for at least one time by the impregnating resin, the impregnation amount of the obtained impregnated decorative paper is 122 percent, the volatile matter content is 7.5 percent by weight, the pre-curing degree is 32 percent, and the thickness of a back surface dry glue layer is 0.03 mm;
preparing impregnated wear-resistant paper: after the wear-resistant base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated wear-resistant paper is 165%, the volatile matter content is 6.7 wt%, and the pre-curing degree is 46%;
preparing impregnated balance paper: after the balance base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated balance paper is 136%, the volatile matter content is 7.9 wt%, and the pre-curing degree is 35%;
(3) preparation of laminate flooring
And combining a high-density fiberboard (formaldehyde release amount is 6mg/100mg) on the impregnated balance paper, sequentially laying the impregnated decorative paper and the impregnated wear-resistant paper on the high-density fiberboard, feeding the high-density fiberboard into a hot press for molding, performing hot pressing for 41 seconds under the conditions that the temperature is 195 ℃ and the pressure is 4MPa, molding, and performing slitting, curing balance and slotting to obtain the reinforced floor.
Comparative example 2
A laminate flooring, the method of making comprising:
(1) preparation of impregnating resins
Mixing 100 parts of melamine formaldehyde resin (with the solid content of 55wt percent), 6 parts of urea and 0.8 part of triethanolamine according to the parts by weight, uniformly stirring, and curing and reacting for 2min at the temperature of 60 ℃ to obtain the impregnating resin;
(2) preparation of impregnated paper
Preparing the impregnated decorative paper: after the decorative base paper is impregnated and dried by the impregnating resin, the back surface of the decorative base paper is coated and dried for at least one time by the impregnating resin, the impregnation amount of the obtained impregnated decorative paper is 122 percent, the volatile matter content is 7.6 percent by weight, the pre-curing degree is 28 percent, and the thickness of a back surface dry glue layer is 0.03 mm;
preparing impregnated wear-resistant paper: after the wear-resistant base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated wear-resistant paper is 165%, the volatile matter content is 6.1 wt%, and the pre-curing degree is 48%;
preparing impregnated balance paper: after the balance base paper is impregnated and dried by the impregnating resin, the impregnation amount of the obtained impregnated balance paper is 136%, the volatile matter content is 7.8 wt%, and the pre-curing degree is 35%;
(3) preparation of laminate flooring
And combining a high-density fiberboard (the formaldehyde emission is 6mg/100g) on the impregnated balance paper, sequentially laying the impregnated decorative paper and the impregnated wear-resistant paper on the high-density fiberboard, feeding the high-density fiberboard into a hot press for molding, performing hot pressing for 41 seconds under the conditions that the temperature is 195 ℃ and the pressure is 4MPa, molding, and performing slitting, curing balance and slotting to obtain the reinforced floor.
The results of examining the formaldehyde emission amount of the laminate flooring obtained in examples 1 to 3 and comparative examples 1 to 2 are shown in Table 1.
Table 1 the results of measuring the formaldehyde emission of the laminate flooring are as follows
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The impregnating resin is characterized by comprising the following raw materials in parts by weight: 100 parts of melamine formaldehyde resin, 3-8 parts of formaldehyde catching agent and 0.5-1 part of curing agent;
wherein the formaldehyde scavenger is a microcapsule comprising a shell of chitosan and a core of urea.
2. The impregnating resin of claim 1, wherein said formaldehyde scavenger is prepared by the following method:
dissolving sodium alginate and chitosan in water to obtain a continuous phase, and dispersing urea in a non-polar organic solvent to obtain a dispersed phase; and adding the dispersed phase into the continuous phase, adding a calcium chloride cross-linking agent, and stirring for reaction to obtain the formaldehyde scavenger.
3. The impregnating resin according to claim 2, wherein the weight ratio of sodium alginate to chitosan is 1:0.5-2, the weight ratio of sodium alginate to urea is 1:2-5, and the weight ratio of sodium alginate to calcium chloride is 1: 0.5-2.
4. Impregnating resin according to any of claims 1-3, wherein said melamine formaldehyde resin is a melamine formaldehyde resin having a solids content of 53-58 wt%.
5. The impregnating resin of any one of claims 1-4, wherein said curing agent is at least one of triethanolamine or hexamethylenetetramine.
6. The impregnating resin according to any one of claims 1 to 5, wherein the impregnating resin is obtained by uniformly mixing the melamine formaldehyde resin, the formaldehyde scavenger and the curing agent, and then carrying out a pre-curing reaction;
preferably, the temperature of the pre-curing reaction is 50-60 ℃ and the time is 1-3 min.
7. An impregnated paper, which is obtained by impregnating a base paper with the impregnating resin according to any one of claims 1 to 6 and then drying the impregnated paper.
8. The impregnated paper of claim 7, wherein the base paper is at least one of a decorative base paper, an abrasion-resistant base paper, or a balance base paper.
9. A laminate flooring obtained by stacking a high-density fiberboard and the impregnated paper sheet according to claim 7 or 8 and then hot-pressing the stacked sheets.
10. The laminate flooring according to claim 9, wherein the high-density fiberboard has a formaldehyde emission of not more than 12mg/100 g.
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| CN202011452825.9A CN112647363A (en) | 2020-12-11 | 2020-12-11 | Impregnating resin, impregnating film paper and laminate flooring |
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| KR20010025930A (en) * | 1999-09-01 | 2001-04-06 | 문상돈 | Preparation methods of chitosan polyelectrolyte complex microcapsule |
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