CN116065419A - A preparation process for improving the brittleness of melamine-impregnated paper - Google Patents
A preparation process for improving the brittleness of melamine-impregnated paper Download PDFInfo
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- CN116065419A CN116065419A CN202310017525.5A CN202310017525A CN116065419A CN 116065419 A CN116065419 A CN 116065419A CN 202310017525 A CN202310017525 A CN 202310017525A CN 116065419 A CN116065419 A CN 116065419A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 239000003292 glue Substances 0.000 claims abstract description 128
- 239000011248 coating agent Substances 0.000 claims abstract description 84
- 238000000576 coating method Methods 0.000 claims abstract description 84
- 239000000839 emulsion Substances 0.000 claims abstract description 49
- 238000005470 impregnation Methods 0.000 claims abstract description 37
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 25
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 13
- 238000007598 dipping method Methods 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 239000002033 PVDF binder Substances 0.000 claims abstract description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 8
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 18
- 239000004202 carbamide Substances 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 13
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 12
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 12
- 239000008098 formaldehyde solution Substances 0.000 claims description 11
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical group COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 235000019253 formic acid Nutrition 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 7
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000005543 nano-size silicon particle Substances 0.000 description 4
- 239000004640 Melamine resin Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 241000270708 Testudinidae Species 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- 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
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- 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
- D21H17/07—Nitrogen-containing compounds
-
- 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
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/72—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/46—Non-macromolecular organic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H21/18—Reinforcing agents
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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
- D21H21/50—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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
Abstract
本发明涉及浸渍纸领域，具体涉及一种改善三聚氰胺浸渍纸脆性的制备工艺，本发明在胶水浸渍和胶水涂布步骤中没有添加任何无机粉体，减少了粉体团聚造成的应力集中使得浸渍纸耐冲击性差进而出现的开裂等现象。本发明通过在胶水浸渍和胶水涂布步骤之间增加了乳液涂布这一关键步骤，以能提高冲击强度的聚醋酸乙烯酯和聚偏氟乙烯基体、能迅速分散冲击力的氧化石墨烯和二氧化硅无机粉体和N‑β‑（氨乙基）‑γ‑氨丙基三甲氧基硅烷形成了一个均匀稳定的乳液体系，以乳液涂布的方式均匀的乳液涂布到浸胶后的三聚氰胺浸渍纸的表面，来提高本发明浸渍纸的耐冲击性。The invention relates to the field of impregnated paper, in particular to a preparation process for improving the brittleness of melamine-impregnated paper. The invention does not add any inorganic powder in the steps of glue impregnation and glue coating, which reduces the stress concentration caused by powder agglomeration and makes the impregnated paper Poor impact resistance leads to cracking and other phenomena. The present invention increases the key step of emulsion coating between the glue dipping and glue coating steps, so as to improve the impact strength of polyvinyl acetate and polyvinylidene fluoride matrix, the graphene oxide that can quickly disperse the impact force and Silica inorganic powder and N‑β‑(aminoethyl)‑γ‑aminopropyltrimethoxysilane form a uniform and stable emulsion system, which is uniformly coated after dipping in the form of emulsion coating The surface of the melamine impregnated paper is used to improve the impact resistance of the impregnated paper of the present invention.
Description
技术领域technical field
本发明涉及浸渍纸领域，具体涉及一种改善三聚氰胺浸渍纸脆性的制备工艺。The invention relates to the field of impregnated paper, in particular to a preparation process for improving the brittleness of melamine-impregnated paper.
背景技术Background technique
浸渍纸能形成耐水、耐热、耐磨、耐污染、富有光泽的树脂保护膜，可制成表面性能优良、花纹美观的装饰面板，因此，浸渍纸在装修装饰材料中得到了广泛的应用，主要应用于家具、地板、门业、橱柜等。Impregnated paper can form a water-resistant, heat-resistant, wear-resistant, pollution-resistant, and glossy resin protective film, and can be made into a decorative panel with excellent surface performance and beautiful patterns. Therefore, impregnated paper has been widely used in decoration and decoration materials. Mainly used in furniture, floors, doors, cabinets, etc.
浸渍纸是以特殊生产的原纸为主，经合成树脂浸渍后干燥后制成，覆盖于人造板基材上，热压粘结形成装饰面纸。目前浸渍胶常用的合成树脂主要为酚醛树脂、脲醛树脂和三聚氰胺树脂，其中三聚氰胺树脂以其较高的性价比成为目前市场最常见、应用最为广泛的浸渍树脂。然而由于三聚氰胺树脂固化后脆性大、强度低、极易脆裂，导致三聚氰胺浸渍纸在贮存、搬运、使用等过程极易发生表面破损、开裂，特别的，有些三聚氰胺浸渍工艺中直接将无机粉体加入到制胶过程中，由于分散不均匀等原因容易造成应力集中，无疑会加剧了三聚氰胺浸渍表面破损、开裂。The impregnated paper is mainly made of specially produced base paper, which is impregnated with synthetic resin and then dried. It is covered on the base material of the wood-based panel and bonded by heat to form a decorative surface paper. At present, the commonly used synthetic resins for impregnating glue are mainly phenolic resin, urea-formaldehyde resin and melamine resin, among which melamine resin has become the most common and widely used impregnating resin in the market due to its high cost performance. However, due to the high brittleness, low strength and brittle cracking of melamine resin after curing, the melamine impregnated paper is prone to surface damage and cracking during storage, transportation, use, etc. Adding it into the glue-making process will easily cause stress concentration due to uneven dispersion and other reasons, which will undoubtedly aggravate the damage and cracking of the melamine-impregnated surface.
发明内容Contents of the invention
本发明的目的在于：为解决背景技术中提到的技术问题，本发明提供了一种改善三聚氰胺浸渍纸脆性的制备工艺。The object of the present invention is: in order to solve the technical problems mentioned in the background technology, the present invention provides a kind of preparation technology that improves the brittleness of melamine-impregnated paper.
本发明为了实现上述目的具体采用以下技术方案： 一种改善三聚氰胺浸渍纸脆性的制备工艺，它包括胶水浸渍和胶水涂布，所述胶水浸渍和胶水涂布之间还设有乳液涂布，形成了依次进行的步骤（1）胶水浸渍、步骤（2）乳液涂布和步骤（3）胶水涂布三个步骤，其中，步骤（2）乳液涂布的具体步骤为 ：The present invention specifically adopts the following technical solutions in order to achieve the above object: A preparation process for improving the brittleness of melamine-impregnated paper, which includes glue impregnation and glue coating, and emulsion coating is also provided between the glue impregnation and glue coating to form Three steps of step (1) glue impregnation, step (2) emulsion coating and step (3) glue coating are carried out in sequence, and the specific steps of step (2) emulsion coating are:
（2.1）制备涂布乳液：将1-2重量份的聚醋酸乙烯酯、2-4重量份的聚偏氟乙烯、1-2重量份氧化石墨烯、1-2重量份纳米二氧化硅与90-94重量份无水乙醇共混，超声震荡，滴加5-8重量份N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷，搅拌形成稳定乳液；(2.1) Preparation of coating emulsion: 1-2 parts by weight of polyvinyl acetate, 2-4 parts by weight of polyvinylidene fluoride, 1-2 parts by weight of graphene oxide, 1-2 parts by weight of nano-silica and 90-94 parts by weight of absolute ethanol are blended, ultrasonically oscillated, 5-8 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane is added dropwise, and stirred to form a stable emulsion;
（2.2）将乳液均匀涂布在步骤（1）胶水浸渍后得到的三聚氰胺浸渍纸正反两面，烘干。(2.2) Apply the emulsion evenly on both sides of the melamine-impregnated paper obtained after the glue impregnation in step (1), and dry it.
本乳液中，N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷不仅可以形成稳定的乳液体系，而且还可以使得乳液能与浸渍胶水和涂布胶水更好的结合。In this emulsion, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane can not only form a stable emulsion system, but also make the emulsion better combine with dipping glue and coating glue.
聚偏氟乙烯除了抗冲击力外，还具有优异的稳定性，长期在阳光和紫外线光源下性能稳定，可以保护原纸花纹颜色的持久性。In addition to impact resistance, polyvinylidene fluoride also has excellent stability, and its performance is stable under sunlight and ultraviolet light sources for a long time, which can protect the durability of the base paper pattern color.
本发明所述步骤（1）胶水浸渍的具体步骤为 ：The concrete steps of step (1) glue impregnation of the present invention are:
（1.1）制备浸渍胶水:(1.1) Preparation of dipping glue:
A、向100重量份质量分数为37％的甲醛水溶液并调节pH值至8.5-9.5，升温至40-50℃，加入30-40重量份三聚氰胺和20-60重量份尿素，继续升温至90-95℃，保温反应40-60min，调节pH值至5.5-6.0，保温反应20-40min；A. To 100 parts by weight of formaldehyde solution with a mass fraction of 37%, adjust the pH value to 8.5-9.5, heat up to 40-50°C, add 30-40 parts by weight of melamine and 20-60 parts by weight of urea, and continue to heat up to 90- 95°C, keep warm for 40-60min, adjust the pH value to 5.5-6.0, keep warm for 20-40min;
B、加入10-30重量份尿素，调节pH值至8.0-9.0，继续保温反应80-100min；B. Add 10-30 parts by weight of urea, adjust the pH value to 8.0-9.0, and continue the heat preservation reaction for 80-100min;
C、降温至55-65℃，加入2-8重量份的二乙二醇醚和10-20重量份的尿素，搅拌60-90min后，降至常温，得到浸渍胶水；C. Cool down to 55-65°C, add 2-8 parts by weight of diethylene glycol ether and 10-20 parts by weight of urea, stir for 60-90 minutes, then drop to normal temperature to obtain impregnated glue;
（1.2）将原纸在浸渍胶水中浸渍10-20min，烘干，得到三聚氰胺浸渍纸。(1.2) Immerse the base paper in the impregnating glue for 10-20min, and dry it to obtain the melamine-impregnated paper.
所述步骤（3）胶水涂布的具体步骤为 ：The specific steps of the step (3) glue coating are:
（3.1）制备涂布胶水：(3.1) Preparation of coating glue:
A、将质量分数为37％的甲醛水溶液18-25重量份、水3-7重量份、二乙二醇醚6-10重量份混合，不断搅拌下加入三乙醇胺调节pH 至8.0-8.5，升温至72-80℃，保温反应20-30min；A. Mix 18-25 parts by weight of formaldehyde solution with a mass fraction of 37%, 3-7 parts by weight of water, and 6-10 parts by weight of diethylene glycol ether, add triethanolamine to adjust the pH to 8.0-8.5 under constant stirring, and heat up To 72-80°C, keep warm for 20-30min;
B、将40-45重量份三聚氰胺缓慢加入到步骤A的混合溶液，再加入聚乙二醇1-3重量份、己内酰胺2-4重量份，保温搅拌110-130min，冷却至室温得到涂布胶水；B. Slowly add 40-45 parts by weight of melamine to the mixed solution in step A, then add 1-3 parts by weight of polyethylene glycol and 2-4 parts by weight of caprolactam, keep stirring for 110-130min, cool to room temperature to obtain coating glue ;
（3.2）将涂布胶水涂到步骤（2）得到的三聚氰胺浸渍纸正反两面，烘干。(3.2) Apply coating glue to both sides of the melamine-impregnated paper obtained in step (2), and dry.
所述步骤（2）中涂布乳液的乳液涂布量为5-10g/㎡，烘干温度为125-135℃。In the step (2), the coating amount of the emulsion is 5-10g/㎡, and the drying temperature is 125-135°C.
所述步骤（1）胶水浸渍的上胶量为40-60g/㎡，烘干温度为125-135℃。In the step (1), the amount of glue to be impregnated with glue is 40-60g/㎡, and the drying temperature is 125-135°C.
所述步骤（3）胶水涂布的上胶量为20-30g/㎡，烘干温度为125-135℃。In the step (3), the amount of glue coated with glue is 20-30g/㎡, and the drying temperature is 125-135°C.
所述步骤（1）胶水浸渍中碱性调节剂为质量分数为10-30％的氢氧化钠溶液，酸性调节剂为质量分数为2-5％的甲酸溶液。In the step (1) of glue impregnation, the alkaline regulator is sodium hydroxide solution with a mass fraction of 10-30%, and the acidic regulator is formic acid solution with a mass fraction of 2-5%.
所述步骤（3）胶水涂布中三聚氰胺以每分钟2kg的加料速度加料。In the step (3) of glue coating, the melamine is fed at a feeding speed of 2 kg per minute.
本发明的有益效果如下：本发明在胶水浸渍和胶水涂布步骤中没有添加任何无机粉体，减少了粉体团聚造成的应力集中使得浸渍纸耐冲击性差进而出现的开裂等现象。本发明通过在胶水浸渍和胶水涂布步骤之间增加了乳液涂布这一关键步骤，以能提高冲击强度的聚醋酸乙烯酯和聚偏氟乙烯基体、能迅速分散冲击力的氧化石墨烯和二氧化硅无机粉体和 N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷形成了一个均匀稳定的乳液体系，以乳液涂布的方式均匀的乳液涂布到浸胶后的三聚氰胺浸渍纸的表面，来提高本发明浸渍纸的耐冲击性。The beneficial effects of the present invention are as follows: the present invention does not add any inorganic powder in the glue impregnation and glue coating steps, which reduces the stress concentration caused by powder agglomeration, which leads to poor impact resistance of impregnated paper and cracks. The present invention increases the key step of emulsion coating between the glue dipping and glue coating steps, so as to improve the impact strength of polyvinyl acetate and polyvinylidene fluoride matrix, the graphene oxide that can quickly disperse the impact force and Silica inorganic powder and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane form a uniform and stable emulsion system, and the emulsion is coated uniformly after dipping in the form of emulsion coating The surface of the melamine impregnated paper is used to improve the impact resistance of the impregnated paper of the present invention.
另外，本发明对胶水浸渍和胶水涂布所用的胶水也进行改性，引入更多的羟基和氨基，穿插到三聚氰胺甲醛树脂的分子链中，减弱高聚物分子链之间的作用力，提高胶水的塑性和柔韧性，进而提高耐冲击性。In addition, the present invention also modifies the glue used for glue impregnation and glue coating, introduces more hydroxyl groups and amino groups, intersperses in the molecular chain of melamine formaldehyde resin, weakens the force between polymer molecular chains, and improves The plasticity and flexibility of the glue improve the impact resistance.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将对本发明实施例中的技术方案进行清楚、完整地描述。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below.
实施例1Example 1
一种改善三聚氰胺浸渍纸脆性的制备工艺，它包括胶水浸渍和胶水涂布，所述胶水浸渍和胶水涂布之间还设有乳液涂布，形成了依次进行的步骤（1）胶水浸渍、步骤（2）乳液涂布和步骤（3）胶水涂布三个步骤，其中，步骤（2）乳液涂布的具体步骤为 ：A preparation process for improving the brittleness of melamine-impregnated paper, which includes glue impregnation and glue coating, and emulsion coating is also provided between the glue impregnation and glue coating, forming the steps (1) glue impregnation, step (2) Three steps of emulsion coating and step (3) glue coating, among which, the specific steps of step (2) emulsion coating are:
（2.1）制备涂布乳液：将1重量份的聚醋酸乙烯酯、2重量份的聚偏氟乙烯、1重量份氧化石墨烯、1重量份纳米二氧化硅与90重量份无水乙醇共混，超声震荡，滴加5重量份N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷，搅拌形成稳定乳液；(2.1) Preparation of coating emulsion: Blend 1 part by weight of polyvinyl acetate, 2 parts by weight of polyvinylidene fluoride, 1 part by weight of graphene oxide, 1 part by weight of nano-silica and 90 parts by weight of absolute ethanol , ultrasonically oscillate, drop 5 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, and stir to form a stable emulsion;
（2.2）将乳液均匀涂布在步骤（1）胶水浸渍后得到的三聚氰胺浸渍纸正反两面，烘干。(2.2) Apply the emulsion evenly on both sides of the melamine-impregnated paper obtained after the glue impregnation in step (1), and dry it.
本发明所述步骤（1）胶水浸渍的具体步骤为 ：The concrete steps of step (1) glue impregnation of the present invention are:
（1.1）制备浸渍胶水:(1.1) Preparation of dipping glue:
A、向100重量份质量分数为37％的甲醛水溶液并调节pH值至8.5，升温至40℃，加入30重量份三聚氰胺和20重量份尿素，继续升温至90℃，保温反应40min，调节pH值至5.5，保温反应20min；A. To 100 parts by weight of formaldehyde solution with a mass fraction of 37%, adjust the pH value to 8.5, heat up to 40°C, add 30 parts by weight of melamine and 20 parts by weight of urea, continue to heat up to 90°C, keep the temperature for 40 minutes, and adjust the pH value To 5.5, keep warm for 20 minutes;
B、加入10重量份尿素，调节pH值至8.0，继续保温反应80min；B. Add 10 parts by weight of urea, adjust the pH value to 8.0, and continue the heat preservation reaction for 80 minutes;
C、降温至55℃，加入2重量份的二乙二醇醚和10重量份的尿素，搅拌60min后，降至常温，得到浸渍胶水；C. Cool down to 55°C, add 2 parts by weight of diethylene glycol ether and 10 parts by weight of urea, stir for 60 minutes, then drop to normal temperature to obtain impregnated glue;
（1.2）将原纸在浸渍胶水中浸渍10min，烘干，得到三聚氰胺浸渍纸。(1.2) Immerse the base paper in the impregnating glue for 10 minutes, and dry it to obtain the melamine impregnated paper.
所述步骤（3）胶水涂布的具体步骤为 ：The specific steps of the step (3) glue coating are:
（3.1）制备涂布胶水：(3.1) Preparation of coating glue:
A、将质量分数为37％的甲醛水溶液18重量份、水3重量份、二乙二醇醚6重量份混合，不断搅拌下加入三乙醇胺调节pH 至8.0，升温至72℃，保温反应20min；A. Mix 18 parts by weight of formaldehyde solution with a mass fraction of 37%, 3 parts by weight of water, and 6 parts by weight of diethylene glycol ether, add triethanolamine under constant stirring to adjust the pH to 8.0, heat up to 72 ° C, and keep the temperature for 20 minutes;
B、将40重量份三聚氰胺缓慢加入到步骤A的混合溶液，再加入聚乙二醇1重量份、己内酰胺2重量份，保温搅拌110min，冷却至室温得到涂布胶水；B. Slowly add 40 parts by weight of melamine to the mixed solution in step A, then add 1 part by weight of polyethylene glycol and 2 parts by weight of caprolactam, heat and stir for 110 minutes, cool to room temperature to obtain coating glue;
（3.2）将涂布胶水涂到步骤（2）得到的三聚氰胺浸渍纸正反两面，烘干。(3.2) Apply coating glue to both sides of the melamine-impregnated paper obtained in step (2), and dry.
所述步骤（2）中涂布乳液的乳液涂布量为5g/㎡，烘干温度为125℃。In the step (2), the coating amount of the emulsion is 5g/㎡, and the drying temperature is 125°C.
所述步骤（1）胶水浸渍的上胶量为40g/㎡，烘干温度为125℃。In the step (1), the amount of glue to be impregnated with glue is 40g/㎡, and the drying temperature is 125°C.
所述步骤（3）胶水涂布的上胶量为20g/㎡，烘干温度为125℃。In the step (3), the amount of glue coated with glue is 20g/㎡, and the drying temperature is 125°C.
所述步骤（1）胶水浸渍中碱性调节剂为质量分数为10％的氢氧化钠溶液，酸性调节剂为质量分数为2％的甲酸溶液。In the step (1), the alkaline regulator in the glue impregnation is a sodium hydroxide solution with a mass fraction of 10%, and the acidic regulator is a formic acid solution with a mass fraction of 2%.
实施例2Example 2
一种改善三聚氰胺浸渍纸脆性的制备工艺，它包括胶水浸渍和胶水涂布，所述胶水浸渍和胶水涂布之间还设有乳液涂布，形成了依次进行的步骤（1）胶水浸渍、步骤（2）乳液涂布和步骤（3）胶水涂布三个步骤，其中，步骤（2）乳液涂布的具体步骤为 ：A preparation process for improving the brittleness of melamine-impregnated paper, which includes glue impregnation and glue coating, and emulsion coating is also provided between the glue impregnation and glue coating, forming the steps (1) glue impregnation, step (2) Three steps of emulsion coating and step (3) glue coating, among which, the specific steps of step (2) emulsion coating are:
（2.1）制备涂布乳液：将2重量份的聚醋酸乙烯酯、3重量份的聚偏氟乙烯、2重量份氧化石墨烯、1重量份纳米二氧化硅与92重量份无水乙醇共混，超声震荡，滴加6重量份N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷，搅拌形成稳定乳液；(2.1) Preparation of coating emulsion: Blend 2 parts by weight of polyvinyl acetate, 3 parts by weight of polyvinylidene fluoride, 2 parts by weight of graphene oxide, 1 part by weight of nano-silica and 92 parts by weight of absolute ethanol , ultrasonically oscillate, drop 6 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, and stir to form a stable emulsion;
（2.2）将乳液均匀涂布在步骤（1）胶水浸渍后得到的三聚氰胺浸渍纸正反两面，烘干。(2.2) Apply the emulsion evenly on both sides of the melamine-impregnated paper obtained after the glue impregnation in step (1), and dry it.
为了提高浸渍纸的整体冲击下，本发明所述步骤（1）胶水浸渍的具体步骤为 ：In order to improve the overall impact of impregnated paper, the specific steps of step (1) glue impregnation of the present invention are:
（1.1）制备浸渍胶水:(1.1) Preparation of dipping glue:
A、向100重量份质量分数为37％的甲醛水溶液并调节pH值至9.0，升温至45℃，加入35重量份三聚氰胺和40重量份尿素，继续升温至92℃，保温反应50min，调节pH值至5.8，保温反应30min；A. To 100 parts by weight of formaldehyde solution with a mass fraction of 37%, adjust the pH value to 9.0, heat up to 45°C, add 35 parts by weight of melamine and 40 parts by weight of urea, continue to heat up to 92°C, keep the temperature for 50 minutes, and adjust the pH value To 5.8, keep warm for 30 minutes;
B、加入20重量份尿素，调节pH值至8.5，继续保温反应90min；B. Add 20 parts by weight of urea, adjust the pH value to 8.5, and continue the heat preservation reaction for 90 minutes;
C、降温至60℃，加入6重量份的二乙二醇醚和15重量份的尿素，搅拌70min后，降至常温，得到浸渍胶水；C. Cool down to 60°C, add 6 parts by weight of diethylene glycol ether and 15 parts by weight of urea, stir for 70 minutes, then drop to normal temperature to obtain impregnated glue;
（1.2）将原纸在浸渍胶水中浸渍15min，烘干，得到三聚氰胺浸渍纸。(1.2) Immerse the base paper in the impregnating glue for 15 minutes and dry to obtain the melamine impregnated paper.
所述步骤（3）胶水涂布的具体步骤为 ：The specific steps of the step (3) glue coating are:
（3.1）制备涂布胶水：(3.1) Preparation of coating glue:
A、将质量分数为37％的甲醛水溶液22重量份、水5重量份、二乙二醇醚8重量份混合，不断搅拌下加入三乙醇胺调节pH 至8.3，升温至78℃，保温反应25min；A. Mix 22 parts by weight of formaldehyde solution with a mass fraction of 37%, 5 parts by weight of water, and 8 parts by weight of diethylene glycol ether, add triethanolamine under constant stirring to adjust the pH to 8.3, heat up to 78 ° C, and keep the temperature for 25 minutes;
B、将42重量份三聚氰胺缓慢加入到步骤A的混合溶液，再加入聚乙二醇2重量份、己内酰胺3重量份，保温搅拌120min，冷却至室温得到涂布胶水；B. Slowly add 42 parts by weight of melamine to the mixed solution in step A, then add 2 parts by weight of polyethylene glycol and 3 parts by weight of caprolactam, heat and stir for 120 minutes, cool to room temperature to obtain coating glue;
（3.2）将涂布胶水涂到步骤（2）得到的三聚氰胺浸渍纸正反两面，烘干。(3.2) Apply coating glue to both sides of the melamine-impregnated paper obtained in step (2), and dry.
所述步骤（2）中涂布乳液的乳液涂布量为8g/㎡，烘干温度为132℃。The coating amount of the emulsion coated in the step (2) is 8g/㎡, and the drying temperature is 132°C.
所述步骤（1）胶水浸渍的上胶量为50g/㎡，烘干温度为130℃。In the step (1), the amount of glue to be impregnated with glue is 50g/㎡, and the drying temperature is 130°C.
所述步骤（3）胶水涂布的上胶量为25g/㎡，烘干温度为131℃。In the step (3), the glue coating amount is 25g/㎡, and the drying temperature is 131°C.
所述步骤（1）胶水浸渍中碱性调节剂为质量分数为20％的氢氧化钠溶液，酸性调节剂为质量分数为4％的甲酸溶液。In the step (1), the alkaline regulator in the glue impregnation is a sodium hydroxide solution with a mass fraction of 20%, and the acidic regulator is a formic acid solution with a mass fraction of 4%.
实施例3Example 3
一种改善三聚氰胺浸渍纸脆性的制备工艺，它包括胶水浸渍和胶水涂布，所述胶水浸渍和胶水涂布之间还设有乳液涂布，形成了依次进行的步骤（1）胶水浸渍、步骤（2）乳液涂布和步骤（3）胶水涂布三个步骤，其中，步骤（2）乳液涂布的具体步骤为 ：A preparation process for improving the brittleness of melamine-impregnated paper, which includes glue impregnation and glue coating, and emulsion coating is also provided between the glue impregnation and glue coating, forming the steps (1) glue impregnation, step (2) Three steps of emulsion coating and step (3) glue coating, among which, the specific steps of step (2) emulsion coating are:
（2.1）制备涂布乳液：将2重量份的聚醋酸乙烯酯、4重量份的聚偏氟乙烯、2重量份氧化石墨烯、2重量份纳米二氧化硅与94重量份无水乙醇共混，超声震荡，滴加8重量份N-β-（氨乙基）-γ-氨丙基三甲氧基硅烷，搅拌形成稳定乳液；(2.1) Preparation of coating emulsion: Blend 2 parts by weight of polyvinyl acetate, 4 parts by weight of polyvinylidene fluoride, 2 parts by weight of graphene oxide, 2 parts by weight of nano-silica and 94 parts by weight of absolute ethanol , ultrasonically oscillate, drop 8 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, and stir to form a stable emulsion;
（2.2）将乳液均匀涂布在步骤（1）胶水浸渍后得到的三聚氰胺浸渍纸正反两面，烘干。(2.2) Apply the emulsion evenly on both sides of the melamine-impregnated paper obtained after the glue impregnation in step (1), and dry it.
为了提高浸渍纸的整体冲击下，本发明所述步骤（1）胶水浸渍的具体步骤为 ：In order to improve the overall impact of impregnated paper, the specific steps of step (1) glue impregnation of the present invention are:
（1.1）制备浸渍胶水:(1.1) Preparation of dipping glue:
A、向100重量份质量分数为37％的甲醛水溶液并调节pH值至9.5，升温至50℃，加入40重量份三聚氰胺和60重量份尿素，继续升温至95℃，保温反应60min，调节pH值至6.0，保温反应40min；A. To 100 parts by weight of formaldehyde aqueous solution with a mass fraction of 37%, adjust the pH value to 9.5, heat up to 50°C, add 40 parts by weight of melamine and 60 parts by weight of urea, continue to heat up to 95°C, keep the temperature for 60 minutes, and adjust the pH value To 6.0, keep warm for 40 minutes;
B、加入30重量份尿素，调节pH值至9.0，继续保温反应100min；B. Add 30 parts by weight of urea, adjust the pH value to 9.0, and continue the heat preservation reaction for 100 minutes;
C、降温至65℃，加入8重量份的二乙二醇醚和20重量份的尿素，搅拌90min后，降至常温，得到浸渍胶水；C. Cool down to 65°C, add 8 parts by weight of diethylene glycol ether and 20 parts by weight of urea, stir for 90 minutes, then drop to normal temperature to obtain impregnated glue;
（1.2）将原纸在浸渍胶水中浸渍20min，烘干，得到三聚氰胺浸渍纸。(1.2) Immerse the base paper in the impregnating glue for 20 minutes and dry to obtain the melamine impregnated paper.
所述步骤（3）胶水涂布的具体步骤为 ：The specific steps of the step (3) glue coating are:
（3.1）制备涂布胶水：(3.1) Preparation of coating glue:
A、将质量分数为37％的甲醛水溶液25重量份、水7重量份、二乙二醇醚10重量份混合，不断搅拌下加入三乙醇胺调节pH 至8.5，升温至80℃，保温反应30min；A. Mix 25 parts by weight of formaldehyde solution with a mass fraction of 37%, 7 parts by weight of water, and 10 parts by weight of diethylene glycol ether, add triethanolamine under constant stirring to adjust the pH to 8.5, heat up to 80 ° C, and keep the temperature for 30 minutes;
B、将45重量份三聚氰胺缓慢加入到步骤A的混合溶液，再加入聚乙二醇3重量份、己内酰胺4重量份，保温搅拌130min，冷却至室温得到涂布胶水；B. Slowly add 45 parts by weight of melamine to the mixed solution in step A, then add 3 parts by weight of polyethylene glycol and 4 parts by weight of caprolactam, heat and stir for 130 minutes, cool to room temperature to obtain coating glue;
（3.2）将涂布胶水涂到步骤（2）得到的三聚氰胺浸渍纸正反两面，烘干。(3.2) Apply coating glue to both sides of the melamine-impregnated paper obtained in step (2), and dry.
所述步骤（2）中涂布乳液的乳液涂布量为10g/㎡，烘干温度为135℃。The coating amount of the emulsion in the step (2) is 10g/㎡, and the drying temperature is 135°C.
所述步骤（1）胶水浸渍的上胶量为55g/㎡，烘干温度为125℃。In the step (1), the amount of glue to be impregnated with glue is 55g/㎡, and the drying temperature is 125°C.
所述步骤（3）胶水涂布的上胶量为30g/㎡，烘干温度为135℃。In the step (3), the glue coating amount is 30g/㎡, and the drying temperature is 135°C.
所述步骤（1）胶水浸渍中碱性调节剂为质量分数为30％的氢氧化钠溶液，酸性调节剂为质量分数为5％的甲酸溶液。In the step (1) of glue impregnation, the alkaline regulator is 30% sodium hydroxide solution, and the acidic regulator is 5% formic acid solution.
对比例1Comparative example 1
本实施例与实施例2的不同之处在于：一种改善三聚氰胺浸渍纸脆性的制备工艺，它仅包括步骤（1）胶水浸渍和步骤（3）胶水涂布二个步骤，不采用步骤（2）乳液涂布，其他地方均相同。The difference between this example and Example 2 is: a preparation process for improving the brittleness of melamine-impregnated paper, which only includes two steps of step (1) glue impregnation and step (3) glue coating, and does not use step (2) ) emulsion coating, other places are the same.
对比例2Comparative example 2
本实施例与实施例2的不同之处在于：一种改善三聚氰胺浸渍纸脆性的制备工艺，它仅包括步骤（1）胶水浸渍和步骤（3）胶水涂布二个步骤，不采用步骤（2）乳液涂布，但是将步骤（2）中的2重量份氧化石墨烯、1重量份纳米二氧化硅加入到步骤（1）中，其他地方均相同。The difference between this example and Example 2 is: a preparation process for improving the brittleness of melamine-impregnated paper, which only includes two steps of step (1) glue impregnation and step (3) glue coating, and does not use step (2) ) emulsion coating, but adding 2 parts by weight of graphene oxide and 1 part by weight of nano-silica in step (2) to step (1), and the other places are the same.
具体的，（1.1）制备浸渍胶水:Specifically, (1.1) prepare impregnated glue:
A、向100重量份质量分数为37％的甲醛水溶液并调节pH值至9.0，升温至45℃，加入35重量份三聚氰胺和40重量份尿素，继续升温至92℃，保温反应50min，调节pH值至5.8，保温反应30min；A. To 100 parts by weight of formaldehyde solution with a mass fraction of 37%, adjust the pH value to 9.0, heat up to 45°C, add 35 parts by weight of melamine and 40 parts by weight of urea, continue to heat up to 92°C, keep the temperature for 50 minutes, and adjust the pH value To 5.8, keep warm for 30 minutes;
B、加入20重量份尿素，调节pH值至8.5，继续保温反应90min；B. Add 20 parts by weight of urea, adjust the pH value to 8.5, and continue the heat preservation reaction for 90 minutes;
C、降温至60℃，加入6重量份的二乙二醇醚、2重量份氧化石墨烯、1重量份纳米二氧化硅和15重量份的尿素，搅拌70min后，降至常温，得到浸渍胶水；C. Cool down to 60°C, add 6 parts by weight of diethylene glycol ether, 2 parts by weight of graphene oxide, 1 part by weight of nano-silicon dioxide and 15 parts by weight of urea, stir for 70 minutes, then drop to normal temperature to obtain impregnated glue ;
（1.2）将原纸在浸渍胶水中浸渍15min，烘干，得到三聚氰胺浸渍纸。(1.2) Immerse the base paper in the impregnating glue for 15 minutes and dry to obtain the melamine impregnated paper.
对比例3Comparative example 3
本实施例与实施例2的不同之处在于：一种改善三聚氰胺浸渍纸脆性的制备工艺，它仅包括步骤（1）胶水浸渍和步骤（3）胶水涂布二个步骤，不采用步骤（2）乳液涂布，但是将步骤（2）中的2重量份氧化石墨烯、1重量份纳米二氧化硅加入到步骤（3）中，其他地方均相同。The difference between this example and Example 2 is: a preparation process for improving the brittleness of melamine-impregnated paper, which only includes two steps of step (1) glue impregnation and step (3) glue coating, and does not use step (2) ) emulsion coating, but adding 2 parts by weight of graphene oxide and 1 part by weight of nano-silica in step (2) to step (3), and the other places are the same.
具体的，（3.1）制备涂布胶水：Specifically, (3.1) Prepare coating glue:
A、将质量分数为37％的甲醛水溶液22重量份、水5重量份、二乙二醇醚8重量份混合，不断搅拌下加入三乙醇胺调节pH 至8.3，升温至78℃，保温反应25min；A. Mix 22 parts by weight of formaldehyde solution with a mass fraction of 37%, 5 parts by weight of water, and 8 parts by weight of diethylene glycol ether, add triethanolamine under constant stirring to adjust the pH to 8.3, heat up to 78 ° C, and keep the temperature for 25 minutes;
B、将42重量份三聚氰胺缓慢加入到步骤A的混合溶液，再加入聚乙二醇2重量份、己内酰胺3重量份、2重量份氧化石墨烯、1重量份纳米二氧化硅，保温搅拌120min，冷却至室温得到涂布胶水；B. Slowly add 42 parts by weight of melamine to the mixed solution of step A, then add 2 parts by weight of polyethylene glycol, 3 parts by weight of caprolactam, 2 parts by weight of graphene oxide, and 1 part by weight of nano silicon dioxide, and keep stirring for 120min. Cool to room temperature to obtain coating glue;
（3.2）将涂布胶水涂到步骤（2）得到的三聚氰胺浸渍纸正反两面，烘干。(3.2) Apply coating glue to both sides of the melamine-impregnated paper obtained in step (2), and dry.
将实施例1-3和对比例1-3的浸渍纸进行形成测试，见下表，测试标准为：拉伸强度：GB/T13022-1991、抗冲击强度：GB/T1843-2008、表面耐龟裂GB/T17657-2013。The impregnated papers of Examples 1-3 and Comparative Examples 1-3 were tested for formation, see the table below, the test standards are: tensile strength: GB/T13022-1991, impact strength: GB/T1843-2008, surface tortoise resistance Crack GB/T17657-2013.
。 .
从上表可以看出，对比例1未采用乳液涂布，浸渍纸的拉伸强度、表面耐龟裂、抗冲击强度等远远比不上实施例1-3的数据，对比文件2将2重量份氧化石墨烯、1重量份纳米二氧化硅加入到胶水浸渍步骤中，形成浸渍纸的内层，对浸渍纸的拉伸强度影响不大，但表面耐龟裂、抗冲击强度则大大下降，对比文件3将2重量份氧化石墨烯、1重量份纳米二氧化硅加入到胶水涂布步骤中，形成浸渍纸的外层，反而提高浸渍纸的拉伸强度，但表面耐龟裂、抗冲击强度还是大大下降。As can be seen from the above table, Comparative Example 1 did not use emulsion coating, and the tensile strength, surface crack resistance, and impact strength of the impregnated paper were far inferior to the data of Examples 1-3. Comparative Document 2 compared 2 Parts by weight of graphene oxide and 1 part by weight of nano silicon dioxide are added to the glue impregnation step to form the inner layer of the impregnated paper, which has little effect on the tensile strength of the impregnated paper, but the surface crack resistance and impact strength are greatly reduced , Comparative Document 3 adds 2 parts by weight of graphene oxide and 1 part by weight of nano-silicon dioxide into the glue coating step to form the outer layer of impregnated paper, which improves the tensile strength of the impregnated paper, but the surface is resistant to cracking and anti-corrosion. The impact strength is still greatly reduced.
在本说明书的描述中，参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention.
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Denomination of invention: A preparation process for improving the brittleness of melamine impregnated paper Granted publication date: 20240723 Pledgee: China Postal Savings Bank Co.,Ltd. Dongguan Changping Branch Pledgor: GUANGDONG FUMEI NEW MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2025980000092 |