WO2022233095A1 - 一种牛皮纸专用的热封乳液及其制备方法 - Google Patents
一种牛皮纸专用的热封乳液及其制备方法 Download PDFInfo
- Publication number
- WO2022233095A1 WO2022233095A1 PCT/CN2021/108882 CN2021108882W WO2022233095A1 WO 2022233095 A1 WO2022233095 A1 WO 2022233095A1 CN 2021108882 W CN2021108882 W CN 2021108882W WO 2022233095 A1 WO2022233095 A1 WO 2022233095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- emulsion
- kraft paper
- heat
- cross
- sealing
- Prior art date
Links
- 239000000839 emulsion Substances 0.000 title claims abstract description 58
- 239000002655 kraft paper Substances 0.000 title claims abstract description 58
- 238000007789 sealing Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 31
- 229920006226 ethylene-acrylic acid Polymers 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000008234 soft water Substances 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 238000004132 cross linking Methods 0.000 claims abstract description 9
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims abstract description 9
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 3
- 229920003180 amino resin Polymers 0.000 claims abstract description 3
- 239000001993 wax Substances 0.000 claims description 12
- 239000003002 pH adjusting agent Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000013530 defoamer Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 229920000573 polyethylene Polymers 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004203 carnauba wax Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 21
- 239000011248 coating agent Substances 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002518 antifoaming agent Substances 0.000 abstract description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 description 8
- 235000013305 food Nutrition 0.000 description 6
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 239000005033 polyvinylidene chloride Substances 0.000 description 5
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 244000105624 Arachis hypogaea Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 241000353135 Psenopsis anomala Species 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000020232 peanut Nutrition 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003075 superhydrophobic effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds 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
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/26—Aminoplasts
-
- 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
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for 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
- 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
- D21H21/06—Paper forming aids
- D21H21/12—Defoamers
-
- 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
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- 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
- D21H27/10—Packing paper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Definitions
- the invention belongs to the technical field of polymers, and in particular relates to a special heat-sealing emulsion for kraft paper and a preparation method thereof.
- Plastic film is widely used in food packaging because of its good toughness, good moisture resistance, and easy portability.
- plastic film is not degradable.
- the problem of white pollution caused by discarded plastic film has become more and more serious.
- Due to its recyclability, kraft paper has a certain thickness and strength, it can be suitable for the packaging of foods such as sausages, peanuts, melon seeds, etc.
- kraft paper has poor waterproof and heat-sealing properties, making it suitable for packaging peanuts, melon seeds, etc.
- the application of moisture-proof and heat-sealable food packaging is limited.
- kraft paper packaging materials have certain anti- and heat-sealing properties
- hot-melt polyethylene (PE) plastic particles are usually sprayed evenly on the surface of kraft paper to form coated kraft paper.
- the film kraft paper has the characteristics of waterproof and high heat sealing, such as the production process of the film kraft paper involved in the Chinese patent CN111270557A.
- Chinese patent CN103059195A relates to a special PVDC latex for kraft paper for food packaging and its preparation method and application.
- the method is to coat kraft paper with a PVDC coating to provide waterproof and heat-sealing properties.
- due to environmental problems of PVDC developed countries such as Europe and the United States have gradually banned the use of PVDC coatings. If the waterproof and heat-sealing properties of kraft paper are improved by other technologies, the application of kraft paper in the field of food packaging will be further expanded.
- the purpose of the present invention is to provide a special heat-sealing emulsion for kraft paper and a preparation method thereof.
- the heat-sealing emulsion and kraft paper have higher adhesion and better heat-sealing strength.
- the invention provides a special heat-sealing emulsion for kraft paper, which, in terms of mass fraction, comprises the following components:
- Soft water 65-78%, ethylene-acrylic acid copolymer particles 18-25%, dispersant 3-8%, cross-linking agent 0.3-1.0%, wax emulsion 0.1-0.5%, defoamer 0.3-0.8% and pH adjuster 0.1 ⁇ 0.5%;
- the crosslinking agent is selected from one or more of polyethyleneimine, amino resin and aziridine.
- the dispersing agent is selected from sodium polyacrylate and/or sodium hexametaphosphate.
- the melting point of the ethylene-acrylic acid copolymer particles is 60-75°C.
- the particle size of the ethylene-acrylic acid copolymer particles is 20-50 meshes.
- the wax emulsion is selected from palm wax and/or polyethylene wax.
- Described defoamer is selected from silicone defoamer
- the pH adjuster is selected from sodium hydroxide and/or potassium hydroxide.
- the present invention provides a preparation method of the special heat-sealing emulsion for kraft paper according to the above technical solution, comprising the following steps:
- the crosslinking agent solution is added dropwise to the EAA solution, and the crosslinking reaction is carried out at 80-90° C. After the reaction is completed, the temperature is kept for 1-2 hours, and the wax emulsion, pH adjuster and defoamer are added, fully stirred, and allowed to stand. Cooled to room temperature to obtain a special heat-sealing emulsion for kraft paper.
- the reaction since the reaction is evacuated before heating the dissolved EAA particles, when the high temperature is dissolved, the pressure generated by the reaction is within a safe range, thereby ensuring the safety of equipment personnel.
- the invention adopts the melting point of EAA polymer particles to be 60-75 DEG C. At 75 DEG C, the coating on the kraft paper has a strong heat sealing strength, which effectively improves the production efficiency of the terminal packaging machine and avoids the high temperature of the soldering iron during sealing. Deterioration of the contents of the package.
- the carboxyl groups in the EAA particles are cross-linked by using a specific type of cross-linking agent, and the cross-linked molecular chains and the fibers on the surface of the kraft paper are chemically bonded to form a dense network molecular structure, and improve the emulsion and kraft paper.
- the adhesion of the coating also has good heat sealing strength at a certain temperature.
- the experimental results show that the water vapor transmission rate of the kraft paper after coating the heat-sealing emulsion of the present invention is 2-5 g/m 2 .day; the heat-sealing strength at 70°C is 1.8-2.4N/15mm; the heat-sealing strength at 75°C is 1.8-2.4N/15mm. 2.5 ⁇ 2.8N/15mm; heat seal strength at 85°C is 3.2 ⁇ 3.5N/15mm; heat seal strength at 90°C is 3.8 ⁇ 4.0N/15mm.
- Example 1 is an effect diagram of the heat-sealed kraft paper prepared in Example 1 of the present invention.
- the prepared cross-linking agent solution is added dropwise in the reactor, the time for adding is controlled to be 3 hours, and the cross-linking reaction temperature is controlled to be 85 ° C;
- Fig. 1 is the appearance diagram of the heat-sealed kraft paper prepared in Example 1 of the present invention.
- the heat-sealing emulsion prepared in Example 1 of the present invention was coated on 150 g/m 2 of kraft paper, and the dry coating amount of the coating was 3 g/m 2 . After drying with hot air, the prepared coated kraft paper was tested. The results are shown in the table below:
- the test method for water vapor transmission rate is GB/T1037, and the test method for heat seal strength is GB/T2358-98.
- the heat-sealing emulsion prepared in Example 2 of the present invention was coated on 80 g/m 2 kraft paper, and the dry coating amount of the coating was 4 g/m 2 . After drying with hot air, the prepared coated kraft paper was tested. , the results are shown in the following table:
- the heat-sealing emulsion prepared in Example 3 of the present invention was coated on 100 g/m 2 of kraft paper, and the dry coating amount of the coating was 5 g/m 2 . After drying with hot air, the prepared coated kraft paper was tested. , the results are shown in the following table:
- the heat-sealing emulsion prepared in Comparative Example 1 was coated on kraft paper of 150 g/m 2 , and the dry coating amount of the coating was 3 g/m 2 . After drying with hot air, the prepared coated kraft paper was tested. See the table below:
- Example 2 The PVDC emulsion of Example 2 in the patent CN103059195A was selected and coated on the kraft paper of 130g/m 2 , and the dry coating amount of the coating was 4g/m 2 . After drying with hot air, the prepared coated kraft paper was detected. The results are shown in the table below:
- the present invention uses a specific type of cross-linking agent to carry out cross-linking reaction of the carboxyl groups in the EAA particles, and chemically bonds the cross-linked molecular chains with the fibers on the surface of the kraft paper to form dense network molecules. Structure, improve the adhesion of emulsion and kraft paper, and the coating also has good heat sealing strength at a certain temperature.
- the surface tension of the emulsion is adjusted by the wax emulsion.
- the emulsion is coated on kraft paper and dried to form a super hydrophobic coating, forming a state of lotus leaf effect and blocking the transmission rate of water vapor.
- the experimental results show that the water vapor transmission rate of the kraft paper after coating the heat-sealing emulsion of the present invention is 2-5 g/m 2 .day; the heat-sealing strength at 70°C is 1.8-2.4N/15mm; the heat-sealing strength at 75°C is 1.8-2.4N/15mm. 2.5 ⁇ 2.8N/15mm; heat seal strength at 85°C is 3.2 ⁇ 3.5N/15mm; heat seal strength at 90°C is 3.8 ⁇ 4.0N/15mm.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
本发明提供了一种牛皮纸专用的热封乳液及其制备方法，热封乳液以质量分数计，包括以下组分：软水65～78％，乙烯-丙烯酸共聚物颗粒18～25％，分散剂3～8％，交联剂0.3～1.0％，蜡乳液0.1～0.5％，消泡剂0.3～0.8％和pH调节剂0.1～0.5％；所述交联剂选自聚乙烯亚胺、氨基树脂和氮丙啶中的一种或多种。本发明通过采用特定种类的交联剂将EAA颗粒中的羧基基团进行交联反应，通过交联分子链和牛皮纸张表面的纤维进行化学键合，形成致密的网状分子结构，提高乳液和牛皮纸具有较高的附着力，在一定温度下涂层还具有较好的热封强度。还具有优异的阻隔水蒸气透过率。
Description
本申请要求于2021年05月06日提交中国专利局、申请号为202110490704.1、发明名称为“一种牛皮纸专用的热封乳液及其制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明属于高分子技术领域，尤其涉及一种牛皮纸专用的热封乳液及其制备方法。
塑料薄膜因其具有韧性好、防潮性好、携带方便等特点而大量用于食品包装，但塑料薄膜不可降解，近几年废弃的塑料薄膜形成的白色污染问题已经越来越严重。牛皮纸由于其可回收、具有一定的厚度和强度，可适用于如腊肠、花生、瓜子等食品的包装，但牛皮纸防水性、热封性能较差，使其在包装花生、瓜子等需要具有良好的防潮性、热封性的食品包装方面的应用受到局限。
为了使牛皮纸类包装材料具有一定的防和热封性能，通常是将热熔聚乙烯(PE)塑料粒子均匀地喷淋在牛皮纸表面上，从而形成淋膜牛皮纸，相比起普通的牛皮纸，淋膜牛皮纸具有防水、高热封等特点，如中国专利CN111270557A涉及的一种淋膜牛皮纸生产工艺。但是当牛皮纸经过淋膜后，制成的食品包装袋子使用后的废弃物，若想回收分离PE层后再制浆，难度非常大。若任由自然分解，需要很长的时间，给环境造成了很大污染，同时也浪费了纸资源。
为了解决淋膜纸回收难问题，国内外已经开始研究通过功能涂层来提高牛皮纸的防水和热封性能。如中国专利CN103059195A涉及的一种用于食品包装的牛皮纸专用PVDC胶乳及其制法和应用，其方法为在牛皮纸上涂布PVDC涂层来提供防水和热封性能。但是PVDC由于环保问题，目前欧美等发达国家已经逐步禁止使用PVDC涂层。若通过其它技术提高牛皮纸的防水和热封性能，将进一步拓宽牛皮纸在食品包装领域的应用。
发明内容
有鉴于此，本发明的目的在于提供一种牛皮纸专用的热封乳液及其制备方法，该热封乳液与牛皮纸具有较高的附着力和较好的热封强度。
本发明提供了一种牛皮纸专用的热封乳液，以质量分数计，包括以下组分：
软水65～78％，乙烯-丙烯酸共聚物颗粒18～25％，分散剂3～8％，交联剂0.3～1.0％，蜡乳液0.1～0.5％，消泡剂0.3～0.8％和pH调节剂0.1～0.5％；
所述交联剂选自聚乙烯亚胺、氨基树脂和氮丙啶中的一种或多种。
在本发明中，所述分散剂选自聚丙烯酸钠和/或六偏磷酸钠。
在本发明中，所述乙烯-丙烯酸共聚物颗粒的熔点为60～75℃。
在本发明中，所述乙烯-丙烯酸共聚物颗粒的粒度为20～50目。
在本发明中，所述蜡乳液选自棕榈蜡和/或聚乙烯蜡。
所述消泡剂选自有机硅消泡剂；
所述pH调节剂选自氢氧化钠和/或氢氧化钾。
本发明提供了一种上述技术方案所述牛皮纸专用的热封乳液的制备方法，包括以下步骤：
将部分软水和交联剂混合，得到交联剂溶液；
将剩余部分软水和乙烯-丙烯酸共聚物颗粒、分散剂混合，抽真空，降压至-(0.06～0.08)MPa，搅拌条件下，升温至100～110℃保持1～2h，使EAA颗粒溶解，得到EAA溶液；
将所述交联剂溶液滴加至EAA溶液中，在80～90℃下交联反应，反应结束后继续保温1～2h，加入蜡乳液、pH调节剂和消泡剂，充分搅拌，静置冷却至室温，得到牛皮纸专用的热封乳液。
本发明在溶解EAA颗粒加热前，由于先将反应进行抽真空，使高温溶解时，反应产生的压力在安全范围内，保证设备人员的安全。本发明采用EAA聚合物颗粒的熔点为60～75℃，在75℃时牛皮纸上的涂层就有较强的热封强度，有效提高终端包装机的生产效率，避免因封口时烙铁温度过高造成包装内物的变质。
本发明通过采用特定种类的交联剂将EAA颗粒中的羧基基团进行交联反应，通过交联分子链和牛皮纸张表面的纤维进行化学键合，形成致密的网状分子结构，提高乳液和牛皮纸的附着力，在一定温度下涂层还具有较好的热封强 度。EAA颗粒分散成乳液状态后，通过蜡乳液调节乳液的表面张力，乳液涂在牛皮纸上烘干后形成超强的疏水涂层，形成荷叶效应状态，阻隔水蒸气的透过率。实验结果表明：涂布本发明的热封乳液后牛皮纸的水蒸汽透过率为2～5g/m
2.day；70℃下热封强度为1.8～2.4N/15mm；75℃下热封强度为2.5～2.8N/15mm；85℃下热封强度为3.2～3.5N/15mm；90℃下热封强度为3.8～4.0N/15mm。
图1为本发明实施例1制备的热封牛皮纸效果图。
下面结合实施例对本发明提供的一种牛皮纸专用的热封乳液及其制备方法进行详细地描述，但不能将它们理解为对本发明保护范围的限定。
实施例1
1、配方：
2、制备：
(1)将15wt％的软水和1.0wt％的交联剂加入到配料罐中，在室温下搅拌1小时，搅拌速度为100转/min，得到交联剂溶液待用；
(2)在反应釜中先加入剩余的软水，再加入25wt％的EAA颗粒料，8wt％的分散剂，关闭反应釜的各个进出口阀门，开启真空泵对反应釜内进行抽真空，将釜内压力降到-0.06MPa，开启搅拌，转速为400转/分，升温到110℃保持1小时，使EAA母料完全溶解；
(3)通过计量泵将配制好的交联剂溶液滴加到反应釜中，滴加时间控制 为3小时，并控制好交联反应温度为85℃；
(4)待交联剂溶液滴加完成后，继续85℃下保温1小时，然后降温到65℃，加入0.4wt％的聚乙烯蜡乳液，0.1wt％的pH调节剂，0.5wt％的有机硅消泡剂，充分搅拌0.5小时，静置待冷却到室温后，得到牛皮纸专用热封乳液。
图1为本发明实施例1制备的热封牛皮纸外观图。
将本发明实施例1制得的热封乳液涂布在150g/m
2的牛皮纸上，涂层干涂布量为3g/m
2，经热风烘干后，将制成的涂布牛皮纸检测，结果见下表：
表1 实施例1制备的牛皮纸专用乳液的性能测试结果
备注：水蒸汽透过率的检测方法为GB/T1037，热封强度检测方法为GB/T2358-98。
实施例2
1、配方：
2、制备：
(1)将15wt％的软水和0.8wt％的交联剂加入到配料罐中，在室温下搅拌0.5小时，搅拌速度为150转/min，得到交联剂溶液待用；
(2)在反应釜中先加入剩余的软水，再加入19％wt的EAA颗粒料，10wt％的分散剂，关闭反应釜的各个进出口阀门，开启真空泵对反应釜内进行抽真空， 将釜内压力降到-0.08MPa，开启搅拌，转速为500转/分，升温到100℃保持2小时，使EAA母料完全溶解；
(3)通过计量泵将配制好的交联剂溶液滴加到反应釜中，滴加时间控制为4小时，并控制好交联反应温度为90℃；
(4)待交联剂溶液滴加完成后，继续90℃下保温2小时，然后降温到50℃，加入0.1wt％的棕榈蜡乳液，0.3wt％的pH调节剂，0.8wt％的有机硅消泡剂，充分搅拌1小时，静置待冷却到室温后，得到牛皮纸专用热封乳液。
将本发明实施例2制得的热封乳液涂布在80g/m
2的牛皮纸上，涂层干涂布量为4g/m
2，经热风烘干后，将制成的涂布牛皮纸进行检测,结果见下表：
表2 实施例2制备的牛皮纸专用乳液的性能测试结果
实施例3
1、配方：
2、制备：
(1)将15wt％的软水和0.7wt％的交联剂加入到配料罐中，在室温下搅拌0.7小时，搅拌速度为130转/min，得到交联剂溶液待用；
(2)在反应釜中先加入剩余的软水，再加入17wt％的EAA颗粒料，3wt％的分散剂，关闭反应釜的各个进出口阀门，开启真空泵对反应釜内进行抽真空，将釜内压力降到-0.07MPa，开启搅拌，转速为300转/分，升温到105℃保持 1.5小时，使EAA母料完全溶解；
(3)通过计量泵将配制好的交联剂溶液滴加到反应釜中，滴加时间控制为5小时，并控制好交联反应温度为80℃；
(4)待交联剂溶液滴加完成后，继续80℃下保温1.5小时，然后降温到55℃，加入0.5wt％的聚乙烯蜡乳液，0.5wt％的pH调节剂，0.3wt％的有机硅消泡剂，充分搅拌0.7小时，静置待冷却到室温后，得到牛皮纸专用热封乳液。
将本发明实施例3制得的热封乳液涂布在100g/m
2的牛皮纸上，涂层干涂布量为5g/m
2，经热风烘干后，将制成的涂布牛皮纸进行检测,结果见下表：
表3 实施例3制备的牛皮纸专用乳液的性能测试结果
对比例1：
1、配方：
2、制备：
(1)将15wt％的软水和1.0wt％的交联剂加入到配料罐中，在室温下搅拌1小时，搅拌速度为100转/min，得到交联剂溶液待用；
(2)在反应釜中先加入剩余的软水，再加入25wt％的EAA颗粒料，8wt％的分散剂，关闭反应釜的各个进出口阀门，开启真空泵对反应釜内进行抽真空，将釜内压力降到-0.06MPa，开启搅拌，转速为400转/分，升温到110℃保持1小时，使EAA母料完全溶解；
(3)通过计量泵将配制好的交联剂溶液滴加到反应釜中，滴加时间控制为3小时，并控制好交联反应温度为85℃；
(4)待交联剂溶液滴加完成后，继续85℃下保温1小时，然后降温到65℃，加入0.4wt％的石蜡乳液，0.1wt％的pH调节剂，0.5wt％的有机硅消泡剂，充分搅拌0.5小时，静置待冷却到室温后，得到牛皮纸专用热封乳液。
将对比例1制得的热封乳液涂布在150g/m
2的牛皮纸上，涂层干涂布量为3g/m
2，经热风烘干后，将制成的涂布牛皮纸进行检测，结果见下表：
表4 对比例1制备的牛皮纸专用热封乳液的性能测试结果
对比例2：
选用专利CN103059195A中实施例2的PVDC乳液，涂布在130g/m
2的牛皮纸上，涂层干涂布量为4g/m
2，经热风烘干后，将制成的涂布牛皮纸进行检测，结果见下表：
表5 对比例2制备的牛皮纸专用乳液的性能测试结果
由以上实施例可知，本发明通过采用特定种类的交联剂将EAA颗粒中的羧基基团进行交联反应，通过交联分子链和牛皮纸张表面的纤维进行化学键合，形成致密的网状分子结构，提高乳液和牛皮纸的附着力，在一定温度下涂层还具有较好的热封强度。EAA颗粒分散成乳液状态后，通过蜡乳液调节乳液的表面张力，乳液涂在牛皮纸上烘干后形成超强的疏水涂层，形成荷叶效应状态，阻隔水蒸气的透过率。实验结果表明：涂布本发明的热封乳液后牛皮纸的水蒸汽透过率为2～5g/m
2.day；70℃下热封强度为1.8～2.4N/15mm；75℃下热封强度为2.5～2.8N/15mm；85℃下热封强度为3.2～3.5N/15mm；90℃下热封 强度为3.8～4.0N/15mm。
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
Claims (7)
- 一种牛皮纸专用的热封乳液，以质量分数计，包括以下组分：软水65～78％，乙烯-丙烯酸共聚物颗粒18～25％，分散剂3～8％，交联剂0.3～1.0％，蜡乳液0.1～0.5％，消泡剂0.3～0.8％和pH调节剂0.1～0.5％；所述交联剂选自聚乙烯亚胺、氨基树脂和氮丙啶中的一种或多种。
- 根据权利要求1所述的热封乳液，其特征在于，所述分散剂选自聚丙烯酸钠和/或六偏磷酸钠。
- 根据权利要求1所述的热封乳液，其特征在于，所述乙烯-丙烯酸共聚物颗粒的熔点为60～75℃。
- 根据权利要求1所述的热封乳液，其特征在于，所述乙烯-丙烯酸共聚物颗粒的粒度为20～50目。
- 根据权利要求1所述的热封乳液，其特征在于，所述蜡乳液选自棕榈蜡和/或聚乙烯蜡。
- 根据权利要求1所述的热封乳液，其特征在于，所述消泡剂选自有机硅消泡剂；所述pH调节剂选自氢氧化钠和/或氢氧化钾。
- 一种权利要求1～6任一项所述牛皮纸专用的热封乳液的制备方法，包括以下步骤：将部分软水和交联剂混合，得到交联剂溶液；将剩余部分软水和乙烯-丙烯酸共聚物颗粒、分散剂混合，抽真空，降压至-(0.06～0.08)MPa，搅拌条件下，升温至100～110℃保持1～2h，使EAA颗粒溶解，得到EAA溶液；将所述交联剂溶液滴加至EAA溶液中，在80～90℃下交联反应，反应结束后继续保温1～2h，加入蜡乳液、pH调节剂和消泡剂，充分搅拌，静置冷却至室温，得到牛皮纸专用的热封乳液。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490704.1A CN113201963A (zh) | 2021-05-06 | 2021-05-06 | 一种牛皮纸专用的热封乳液及其制备方法 |
| CN202110490704.1 | 2021-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022233095A1 true WO2022233095A1 (zh) | 2022-11-10 |
Family
ID=77029002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2021/108882 WO2022233095A1 (zh) | 2021-05-06 | 2021-07-28 | 一种牛皮纸专用的热封乳液及其制备方法 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113201963A (zh) |
| WO (1) | WO2022233095A1 (zh) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691225A (zh) * | 2020-06-15 | 2020-09-22 | 天津科技大学 | 一种提高纸页透明度和防水性能的方法 |
| CN113699828A (zh) * | 2021-09-02 | 2021-11-26 | 海南必凯水性新材料有限公司 | 一种热封型eaa乳液、其制备方法与复合纸张 |
| CN113717660A (zh) * | 2021-09-24 | 2021-11-30 | 海南必凯水性新材料有限公司 | 一种低温热封胶及其制备方法 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060292323A1 (en) * | 2005-04-18 | 2006-12-28 | Hutchinson Gerald A | Water-resistant coated articles and methods of making same |
| US20070087189A1 (en) * | 2005-10-13 | 2007-04-19 | Michelman, Inc. | Coating for enhancing low temperature heat sealability and high hot tack to polymeric substrates |
| CN108026421A (zh) * | 2015-08-06 | 2018-05-11 | 阿塔卡北美公司 | 用于热封涂层的包含聚氨酯和烯属共聚物的水性分散体 |
| CN108102472A (zh) * | 2017-12-21 | 2018-06-01 | 海南必凯水性新材料有限公司 | 一种薄膜用低温热封涂料及其制备方法 |
| CN108148215A (zh) * | 2017-12-21 | 2018-06-12 | 海南必凯水性新材料有限公司 | 一种低温热封eea乳液及其制备方法 |
| CN108176573A (zh) * | 2017-12-21 | 2018-06-19 | 海南赛诺实业有限公司 | 一种低温热封涂布膜及其制造方法 |
| JP2020164554A (ja) * | 2019-03-28 | 2020-10-08 | Dic株式会社 | コーティング剤、これを塗工した積層体、包装材及び加工品 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU666760B2 (en) * | 1992-07-23 | 1996-02-22 | Graphic Packaging International, Inc. | Dual ovenable food container |
| JP5133477B2 (ja) * | 2001-04-27 | 2013-01-30 | 東邦化学工業株式会社 | 樹脂エマルション組成物 |
| CN102850891B (zh) * | 2012-09-09 | 2014-10-08 | 海南必凯水性涂料有限公司 | 一种涂布用低温热封型丙烯酸乳液及其制备方法 |
| CN103059783B (zh) * | 2012-12-26 | 2015-02-25 | 海南必凯水性涂料有限公司 | 一种用于塑料薄膜复合的改性水性丙烯酸酯复膜胶及其制备方法、应用 |
| CN103008212B (zh) * | 2012-12-26 | 2015-01-21 | 海南赛诺实业有限公司 | 巧克力热敏性食品涂布膜的涂布方法及实施该方法的涂布系统 |
| KR20180005216A (ko) * | 2015-05-12 | 2018-01-15 | 바스프 에스이 | 표면-처리된, 수성계 중합체 코팅을 포함하는 코팅된 기판 및 그를 제조하고 사용하는 방법 |
| CN106638121B (zh) * | 2016-12-30 | 2018-11-13 | 北京蓝海黑石科技有限公司 | 一种纸张含浸液及其制备方法 |
| CN108084370A (zh) * | 2017-12-21 | 2018-05-29 | 海南必凯水性新材料有限公司 | 一种低温热封eva乳液及其制备方法和用途 |
-
2021
- 2021-05-06 CN CN202110490704.1A patent/CN113201963A/zh active Pending
- 2021-07-28 WO PCT/CN2021/108882 patent/WO2022233095A1/zh active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060292323A1 (en) * | 2005-04-18 | 2006-12-28 | Hutchinson Gerald A | Water-resistant coated articles and methods of making same |
| US20070087189A1 (en) * | 2005-10-13 | 2007-04-19 | Michelman, Inc. | Coating for enhancing low temperature heat sealability and high hot tack to polymeric substrates |
| CN108026421A (zh) * | 2015-08-06 | 2018-05-11 | 阿塔卡北美公司 | 用于热封涂层的包含聚氨酯和烯属共聚物的水性分散体 |
| CN108102472A (zh) * | 2017-12-21 | 2018-06-01 | 海南必凯水性新材料有限公司 | 一种薄膜用低温热封涂料及其制备方法 |
| CN108148215A (zh) * | 2017-12-21 | 2018-06-12 | 海南必凯水性新材料有限公司 | 一种低温热封eea乳液及其制备方法 |
| CN108176573A (zh) * | 2017-12-21 | 2018-06-19 | 海南赛诺实业有限公司 | 一种低温热封涂布膜及其制造方法 |
| JP2020164554A (ja) * | 2019-03-28 | 2020-10-08 | Dic株式会社 | コーティング剤、これを塗工した積層体、包装材及び加工品 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113201963A (zh) | 2021-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022233095A1 (zh) | 一种牛皮纸专用的热封乳液及其制备方法 | |
| CN104354362B (zh) | 一种超高阻隔透明镀氧化铝薄膜及其制造方法 | |
| CN107353605B (zh) | 一种多功能石墨烯/pet复合膜及其制备方法 | |
| CN109629326B (zh) | 一种阻隔疏水纸基涂料的制备方法及应用 | |
| US11739227B2 (en) | Graphene painting with anti-corrosion and heat dissipation properties | |
| CN110117004A (zh) | 一种还原氧化石墨烯基复合膜的制备方法 | |
| CN104801245A (zh) | 一种环氧树脂填充取向碳纳米管束胶囊及其制备方法 | |
| WO2022205702A1 (zh) | 一种纸张用的热封型丙烯酸乳液及其制备方法 | |
| CN107523229A (zh) | 一种压敏性储能胶带及其制备方法 | |
| CN107325781A (zh) | 有机硅密封胶组合物、有机硅密封胶及其制备方法 | |
| CN104356802A (zh) | 一种水性丙烯酸氨基烤漆 | |
| WO2023273192A1 (zh) | 一种改性二氧化硅填料及其制备方法 | |
| CN113150625A (zh) | 一种用于pe涂布膜的pvoh乳液及其制备方法 | |
| CN113524843A (zh) | 一种高阻隔复合膜及其制备方法 | |
| CN108822409B (zh) | 一种可调温的cpp/bopp复合包装薄膜及制备方法 | |
| CN108250475A (zh) | 一种具有高阻隔性能的pvdc涂层材料及其制备方法 | |
| CN107541180A (zh) | 一种酸性室温硫化硅酮密封胶 | |
| KR101209851B1 (ko) | 1액형 유/무기 에멀젼 수지 조성물 및 이의 제조 방법 | |
| CN110862576A (zh) | 一种改性氮化硼颗粒及其制备方法和应用 | |
| CN116373397A (zh) | 一种动力型锂电池用耐腐蚀复合膜的制备方法 | |
| CN113699828A (zh) | 一种热封型eaa乳液、其制备方法与复合纸张 | |
| CN114456647A (zh) | 一种酸奶不沾盖专用乳液及其制备方法和应用 | |
| CN107022092A (zh) | 一种以水滑石作为成核剂制备聚丙烯/水滑石纳米复合材料的方法 | |
| CN113461993A (zh) | 一种离型力极轻离型膜及生产方法 | |
| CN114106370A (zh) | 一种低密度复合型相变薄膜材料及其制备方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21939740 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 21939740 Country of ref document: EP Kind code of ref document: A1 |