CN108677615A - A kind of food wrapper oil-proofing agent and preparation method thereof - Google Patents

A kind of food wrapper oil-proofing agent and preparation method thereof Download PDF

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Publication number
CN108677615A
CN108677615A CN201810426879.4A CN201810426879A CN108677615A CN 108677615 A CN108677615 A CN 108677615A CN 201810426879 A CN201810426879 A CN 201810426879A CN 108677615 A CN108677615 A CN 108677615A
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China
Prior art keywords
parts
oil
proofing agent
cellulose
acid
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Pending
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CN201810426879.4A
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Chinese (zh)
Inventor
冯文田
冯超
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Jurong Xingwu Packaging Co Ltd
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Jurong Xingwu Packaging Co Ltd
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Priority to CN201810426879.4A priority Critical patent/CN108677615A/en
Publication of CN108677615A publication Critical patent/CN108677615A/en
Pending legal-status Critical Current

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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
    • D21H27/10—Packing 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
    • 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
    • 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
    • D21H17/25—Cellulose
    • 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
    • D21H17/28—Starch
    • 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
    • D21H17/34—Synthetic 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
    • 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
    • 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
    • D21H17/53—Polyethers; Polyesters
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

The invention discloses a kind of food wrapper oil-proofing agent and preparation method thereof, the raw material of the oil-proofing agent includes：Cationic starch, polylactic acid, chitosan, organic acid, soybean protein isolate, cellulose, sodium citrate, polyoxyethylene aliphatic alcohol ether, poloxalkol, sodium alginate, hydrogenated vegetable oil and water.The present invention is mixed and made into oil-proofing agent using chitosan and cationic starch, polylactic acid, can be used for paper for surface sizing, can also enhance the mechanical strength and pliability of paper while water proofing property, the grease proofness for improving food packaging paper.

Description

A kind of food wrapper oil-proofing agent and preparation method thereof
Technical field
The invention belongs to pulp technology for making paper, and in particular to a kind of food wrapper oil-proofing agent and preparation method thereof.
Background technology
Packaging whether considers from safety or from beauty, in the food industry in occupation of very important status to food The requirement of product packaging material is all increasingly tighter, and the market share of food packaging at present accounts for more than half of packaging industry.In recent years, Food enterprise increasingly payes attention to the selection of its product packaging material.Packaging material for food type is various, and wherein plastics are tradition Packaging material, because of its lighter in weight just, cheap and good barrier property occupy in traditional food packaging market it is sizable Market.However, since plastics are harmful to health, it is difficult degradation in nature, serious dirt is caused to environment Dye, following food packaging applications will gradually ban this packaging material.In recent years, the important of environmental protection is appealed by global environmental protection organization Property, developing food products wrapping paper has prodigious development space.Papery food packaging is as a kind of environmentally protective packaging material The best substitute of the nondegradable packaging material such as plastics has boundless development prospect in food packaging applications.
When paper is applied to food packaging, different types of oil and some easy substances for causing greasy dirt can be encountered, are assigned The good grease proofing effect of paper is given, various process means may be used, special working process is carried out to paper, traditional is " grease proofing Paper " be cover one layer of metal foil or plastic film on paper surface, or with polyvinyl alcohol, polyvinylidene chloride, carboxymethyl cellulose, The high-molecular compounds such as NBR latex are coated or impregnated with paper and obtain, but there are difficult to degrade and easily move for this kind of paper-plastic package material The harm of shifting.Oil-repellent sizing is used in recent years, though solve the problems, such as degradation and recycling, however caused Halothane gene is not Hold respite.
Invention content
The object of the present invention is to provide a kind of food wrapper oil-proofing agents and preparation method thereof.
A kind of food wrapper oil-proofing agent, raw material include in parts by weight：2-5 parts of cationic starch, polylactic acid 1-2 Part, 1-3 parts of chitosan, 0.5-1 parts of organic acid, 2-4 parts of soybean protein isolate, 1-2 parts of cellulose, 0.2-0.6 parts of sodium citrate, 0.5-1.2 parts of polyoxyethylene aliphatic alcohol ether, 0.3-0.5 parts of Pluronic F68,1-3 parts of sodium alginate, hydrogenation 2-5 parts of vegetable oil, 5-10 parts of water.
Preferably, the organic acid is selected from tartaric acid, oxalic acid, malic acid or citric acid.
Preferably, the cellulose is selected from methylcellulose, ethyl cellulose, hydroxypropyl cellulose or hypromellose Element.
Preferably, the deacetylation of the chitosan is 60-70%.
Preferably, the Pluronic F68 is poloxamer P123.
The preparation method of above-mentioned food wrapper oil-proofing agent, includes the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
The present invention is mixed and made into oil-proofing agent using chitosan and cationic starch, polylactic acid, can be used for paper for surface sizing, The mechanical strength and pliability of paper can also be enhanced while water proofing property, the grease proofness for improving food packaging paper.
Specific implementation mode
Embodiment 1
A kind of food wrapper oil-proofing agent, raw material include in parts by weight：2 parts of cationic starch, 1 part of polylactic acid, chitosan 1 Part, 0.5 part of organic acid, 2 parts of soybean protein isolate, 1 part of cellulose, 0.2 part of sodium citrate, 0.5 part of polyoxyethylene aliphatic alcohol ether, 0.3 part of Pluronic F68,1 part of sodium alginate, 2 parts of hydrogenated vegetable oil, 5 parts of water.
Wherein, the organic acid is the mixture of tartaric acid and oxalic acid, and the weight ratio of tartaric acid and oxalic acid is 1：1.It is described Cellulose is methylcellulose.The deacetylation of the chitosan is 60-70%.The Pluronic F68 is Poloxamer P123.
The preparation method of above-mentioned food wrapper oil-proofing agent, includes the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
Gained oil-proofing agent is added to by the dosage of 5wt.% in Cypres and is applied over base paper surface, Cypres Dosage is 10g/m2.The tensile strength of gained greaseproof is 3.52kN/m, bursting strength 233kPa, grease proofing grade are 9 grades, Cobb60Value is 21.2g/m2。
Embodiment 2
A kind of food wrapper oil-proofing agent, raw material include in parts by weight：3 parts of cationic starch, 1.5 parts of polylactic acid, shell are poly- 2 parts of sugar, 0.7 part of organic acid, 3 parts of soybean protein isolate, 1.5 parts of cellulose, 0.4 part of sodium citrate, polyoxyethylene aliphatic alcohol ether 0.8 part, 0.4 part of Pluronic F68,2 parts of sodium alginate, 4 parts of hydrogenated vegetable oil, 7 parts of water.
Wherein, the organic acid is malic acid.The cellulose is the mixture of ethyl cellulose and hydroxypropyl cellulose, The weight ratio of ethyl cellulose and hydroxypropyl cellulose is 2：1.The deacetylation of the chitosan is 60-70%.The polyoxy second Alkene-poiyoxypropylene copolymer is poloxamer P123.
The preparation method of above-mentioned food wrapper oil-proofing agent, includes the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
Gained oil-proofing agent is added to by the dosage of 5wt.% in Cypres and is applied over base paper surface, Cypres Dosage is 10g/m2.The tensile strength of gained greaseproof is 3.48kN/m, bursting strength 224kPa, grease proofing grade are 9 grades, Cobb60Value is 20.4g/m2。
Embodiment 3
A kind of food wrapper oil-proofing agent, raw material include in parts by weight：4 parts of cationic starch, 1 part of polylactic acid, chitosan 2 Part, 0.8 part of organic acid, 3 parts of soybean protein isolate, 2 parts of cellulose, 0.5 part of sodium citrate, 0.8 part of polyoxyethylene aliphatic alcohol ether, 0.4 part of Pluronic F68,2 parts of sodium alginate, 5 parts of hydrogenated vegetable oil, 8 parts of water.
Wherein, the organic acid is the mixture of tartaric acid and citric acid, and the weight ratio of tartaric acid and citric acid is 1：2. The cellulose is hydroxypropyl cellulose and hydroxypropyl methylcellulose, and the weight ratio of hydroxypropyl cellulose and hydroxypropyl methylcellulose is 1： 1.The deacetylation of the chitosan is 60-70%.The Pluronic F68 is poloxamer P123.
The preparation method of above-mentioned food wrapper oil-proofing agent, includes the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
Gained oil-proofing agent is added to by the dosage of 10wt.% in Cypres and is applied over base paper surface, Cypres Dosage is 10g/m2.The tensile strength of gained greaseproof is 3.57kN/m, bursting strength 239kPa, grease proofing grade are 9 grades, Cobb60Value is 21.6g/m2。
Embodiment 4
A kind of food wrapper oil-proofing agent, raw material include in parts by weight：5 parts of cationic starch, 2 parts of polylactic acid, chitosan 3 Part, 1 part of organic acid, 4 parts of soybean protein isolate, 2 parts of cellulose, 0.6 part of sodium citrate, 1.2 parts of polyoxyethylene aliphatic alcohol ether gather 0.5 part of ethylene oxide-poiyoxypropylene copolymer, 3 parts of sodium alginate, 5 parts of hydrogenated vegetable oil, 10 parts of water.
Wherein, the organic acid is the mixture of tartaric acid and oxalic acid, and the weight ratio of tartaric acid and oxalic acid is 1：1.It is described Cellulose is methylcellulose.The deacetylation of the chitosan is 60-70%.The Pluronic F68 is Poloxamer P123.
The preparation method of above-mentioned food wrapper oil-proofing agent, includes the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
Gained oil-proofing agent is added to by the dosage of 10wt.% in Cypres and is applied over base paper surface, Cypres Dosage is 10g/m2.The tensile strength of gained greaseproof is 3.61kN/m, bursting strength 242kPa, grease proofing grade are 9 grades, Cobb60Value is 21.8g/m2。

Claims (6)

1. a kind of food wrapper oil-proofing agent, it is characterised in that：Raw material includes in parts by weight：2-5 parts of cationic starch gathers 1-2 parts of lactic acid, 1-3 parts of chitosan, 0.5-1 parts of organic acid, 2-4 parts of soybean protein isolate, 1-2 parts of cellulose, sodium citrate 0.2-0.6 parts, 0.5-1.2 parts of polyoxyethylene aliphatic alcohol ether, 0.3-0.5 parts of Pluronic F68, sodium alginate 1-3 parts, 2-5 parts of hydrogenated vegetable oil, 5-10 parts of water.
2. food wrapper oil-proofing agent according to claim 1, it is characterised in that：The organic acid be selected from tartaric acid, Oxalic acid, malic acid or citric acid.
3. food wrapper oil-proofing agent according to claim 1, it is characterised in that：The cellulose is selected from Methyl cellulose Element, ethyl cellulose, hydroxypropyl cellulose or hydroxypropyl methylcellulose.
4. food wrapper oil-proofing agent according to claim 1, it is characterised in that：The deacetylation of the chitosan is 60-70%。
5. food wrapper oil-proofing agent according to claim 1, it is characterised in that：The PULLRONIC F68 Copolymer is poloxamer P123.
6. the preparation method of food wrapper oil-proofing agent described in claim 1, it is characterised in that：Include the following steps：
Step 1, cationic starch, polylactic acid, cellulose and sodium alginate are added in water, is heated to 70-80 DEG C, stir 30- 40min is cooled to room temperature, obtains mixed liquor A；
Step 2, chitosan, organic acid, sodium citrate, soybean protein are added in mixed liquor A, stirs, obtains mixed liquid B；
Step 3, polyoxyethylene aliphatic alcohol ether, Pluronic F68, hydrogenated vegetable oil are added in mixed liquid B, Dispersion to get.
CN201810426879.4A 2018-05-07 2018-05-07 A kind of food wrapper oil-proofing agent and preparation method thereof Pending CN108677615A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110952375A (en) * 2019-11-19 2020-04-03 浙江华丰纸业科技有限公司 Food-grade oilproof paper and preparation method thereof
CN111379195A (en) * 2020-04-03 2020-07-07 山东仁丰特种材料股份有限公司 Film transfer sizing method for oilproof paper
CN111851136A (en) * 2020-07-25 2020-10-30 吉特利环保科技（厦门）有限公司 Starch-based biological fluorine-free oil-proof agent, emulsification system for preparing oil-proof agent and production process of emulsification system
CN112007941A (en) * 2020-09-16 2020-12-01 苏州威瑞成新材料有限公司 Treatment device and process for medical plastic consumables
CN116623462A (en) * 2023-06-05 2023-08-22 华邦古楼新材料有限公司 Non-laminated fluorine-free waterproof oil-proof paint and food packaging paper

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Publication number Priority date Publication date Assignee Title
CN101935440A (en) * 2010-09-26 2011-01-05 华南理工大学 Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof
KR20150089904A (en) * 2014-01-28 2015-08-05 곽한대 manufacturing method of antibacterial food paper using bactoster alexin and antibacterial food paper thereby
CN105518214A (en) * 2013-09-05 2016-04-20 盟迪股份公司 Food wrap paper and method of manufacturing same
CN106638139A (en) * 2016-12-09 2017-05-10 苏州艾博迈尔新材料有限公司 Compound oil-proofing agent for paper and preparation method of compound oil-proofing agent
CN106702812A (en) * 2016-12-09 2017-05-24 苏州艾博迈尔新材料有限公司 Coating type paper sheet oil-proof agent and preparation method of coating type paper sheet oil-proof agent
CN107675552A (en) * 2017-10-24 2018-02-09 苏州丰倍生物科技有限公司 A kind of plant type paper products water and oil repellent agent capable of washing and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935440A (en) * 2010-09-26 2011-01-05 华南理工大学 Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof
CN105518214A (en) * 2013-09-05 2016-04-20 盟迪股份公司 Food wrap paper and method of manufacturing same
KR20150089904A (en) * 2014-01-28 2015-08-05 곽한대 manufacturing method of antibacterial food paper using bactoster alexin and antibacterial food paper thereby
CN106638139A (en) * 2016-12-09 2017-05-10 苏州艾博迈尔新材料有限公司 Compound oil-proofing agent for paper and preparation method of compound oil-proofing agent
CN106702812A (en) * 2016-12-09 2017-05-24 苏州艾博迈尔新材料有限公司 Coating type paper sheet oil-proof agent and preparation method of coating type paper sheet oil-proof agent
CN107675552A (en) * 2017-10-24 2018-02-09 苏州丰倍生物科技有限公司 A kind of plant type paper products water and oil repellent agent capable of washing and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110952375A (en) * 2019-11-19 2020-04-03 浙江华丰纸业科技有限公司 Food-grade oilproof paper and preparation method thereof
CN111379195A (en) * 2020-04-03 2020-07-07 山东仁丰特种材料股份有限公司 Film transfer sizing method for oilproof paper
CN111851136A (en) * 2020-07-25 2020-10-30 吉特利环保科技（厦门）有限公司 Starch-based biological fluorine-free oil-proof agent, emulsification system for preparing oil-proof agent and production process of emulsification system
CN111851136B (en) * 2020-07-25 2022-07-08 吉特利环保科技（厦门）有限公司 Starch-based biological fluorine-free oil-proof agent, emulsification system for preparing oil-proof agent and production process of emulsification system
CN112007941A (en) * 2020-09-16 2020-12-01 苏州威瑞成新材料有限公司 Treatment device and process for medical plastic consumables
CN116623462A (en) * 2023-06-05 2023-08-22 华邦古楼新材料有限公司 Non-laminated fluorine-free waterproof oil-proof paint and food packaging paper
CN116623462B (en) * 2023-06-05 2024-02-13 华邦古楼新材料有限公司 Non-laminated fluorine-free waterproof oil-proof paint and food packaging paper

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Application publication date: 20181019