CN113150718A - Preparation and application of environment-friendly flame-retardant adhesive for cartons - Google Patents

Preparation and application of environment-friendly flame-retardant adhesive for cartons Download PDF

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Publication number
CN113150718A
CN113150718A CN202110355652.7A CN202110355652A CN113150718A CN 113150718 A CN113150718 A CN 113150718A CN 202110355652 A CN202110355652 A CN 202110355652A CN 113150718 A CN113150718 A CN 113150718A
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CN
China
Prior art keywords
environment
retardant adhesive
cartons
flame
friendly flame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110355652.7A
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Chinese (zh)
Inventor
刘鹏
凌建娣
李明
谢丰蔚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou University
Institute of Food Science and Technology of CAAS
Original Assignee
Guangzhou University
Institute of Food Science and Technology of CAAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou University, Institute of Food Science and Technology of CAAS filed Critical Guangzhou University
Priority to CN202110355652.7A priority Critical patent/CN113150718A/en
Publication of CN113150718A publication Critical patent/CN113150718A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J103/00Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09J103/12Amylose; Amylopectin; Degradation products thereof
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/04Non-macromolecular additives inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/16Halogen-containing compounds
    • C08K2003/162Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride

Abstract

The invention belongs to the field of adhesives, and discloses preparation and application of a green and environment-friendly flame-retardant adhesive for a carton. The preparation method of the flame-retardant adhesive comprises the following steps: adding high amylose starch into a calcium chloride solution, uniformly stirring, and heating to obtain transparent colloidal fluid; and then adding glycerol into the transparent colloidal fluid, preserving heat, stirring and blending, and cooling to obtain the environment-friendly flame-retardant adhesive for the cartons. The high amylose starch refers to natural starch with the high amylose content of more than 50 percent in starch. The invention creatively adopts high amylose starch and glycerin as raw materials to prepare the environment-friendly flame-retardant adhesive for the carton, which meets the requirement of carton adhesion, has flame retardance and can prevent fire.

Description

Preparation and application of environment-friendly flame-retardant adhesive for cartons
Technical Field
The invention belongs to the field of adhesives, and particularly relates to preparation and application of a green and environment-friendly flame-retardant adhesive for a carton.
Background
With the explosive development of electronic commerce and express delivery, hundreds of millions of commodities are transported to various places through cartons every day. The carton belongs to inflammable substance, and a large amount of cartons are piled up and are deposited and are very easily cause fire accidents. For example, the Guangdong Shenzhen in 2019 jointly issued with Xingxi paper products factory generates great fire, and the loss is as high as 2 hundred million yuan; in the 'double 11' period of 2019, one express delivery truck is on fire, and 13 tons of express packages are burnt.
In order to avoid fire accidents of the carton in factory buildings and transportation processes, the carton needs to be subjected to flame retardant treatment. Most of the existing flame-retardant cartons are made by spraying flame retardant, adding flame-retardant filler or making flame-retardant fibers into paper-making fibers, so that the paper has a flame-retardant effect. These methods have high production cost and complex operation process, and part of the methods can not effectively resist flame. On the other hand, starch is a common carton adhesive, but the processing procedure of the common starch adhesive is complex, starch prepared from modified starch is easy to agglomerate in the sizing process, the starch is not easy to dry after being coated on corrugated boards, and the corrugated boards are easy to absorb water and deform.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention mainly aims to provide a preparation method of a green environment-friendly flame-retardant adhesive for a carton.
The invention also aims to provide the environment-friendly flame-retardant adhesive for the cartons, which is prepared by the method.
The invention further aims to provide application of the environment-friendly flame-retardant adhesive for the cartons. According to the invention, the sizing process is simplified by modifying starch, so that the starch glue is more viscous and has stronger binding power; on the other hand, the ignition point of the starch glue is improved, and the safety of transportation and storage is improved.
The purpose of the invention is realized by the following scheme:
a preparation method of a green environment-friendly flame-retardant adhesive for cartons comprises the following steps:
adding high amylose starch into a calcium chloride solution, uniformly stirring, and heating to obtain transparent colloidal fluid; and then adding glycerol into the transparent colloidal fluid, preserving heat, stirring and blending, and cooling to obtain the environment-friendly flame-retardant adhesive for the cartons.
The high amylose starch refers to natural starch with the amylose content of not less than 50 percent in starch.
The mass ratio of the calcium chloride to the water in the calcium chloride solution is 1: 1.25-1: 2.5, and preferably 1:2.
The dosage of the high amylose starch and the calcium chloride solution meets the following requirements: the mass ratio of the high amylose starch to the calcium chloride solution is not less than 1:10, preferably 1.4: 10-1.7: 10.
The temperature of the heating treatment is not lower than 65 ℃, and preferably 75 ℃;
the time of the heat treatment is not shorter than 0.5h, preferably 1.5 h.
The glycerol is used in such an amount that the mass ratio of glycerol to high amylose is greater than 1:19, preferably 9: 41.
The time for mixing and stirring under heat preservation is not less than 0.5h, preferably 1 h.
The sample prepared by the method is cooled to obtain the adhesive liquid.
The environment-friendly flame-retardant adhesive for the cartons, which is prepared by the method, is disclosed.
The green environment-friendly flame-retardant adhesive for the carton is applied to the carton.
The application method of the environment-friendly flame-retardant adhesive for the cartons adopts a hot sizing mode to coat: the adhesive is first heated to over 80 deg.c to form flowable sol, and then coated directly onto the surface of paperboard to adhere other paperboards. After bonding, the paper box is dried for 10-20min in an environment with the temperature of more than 60 ℃, the paper boards can be firmly bonded, and the bonding part can be flame-retardant.
The mechanism of the invention is as follows:
the amylopectin content of common starch is high. The gelatinized amylopectin has high viscosity but weak binding force to water, so the formed glue solution has high free water content, volatile water, unstable performance and weak binding force. In the high amylose starch, the content of the amylose is high, and the formed gel structure has strong binding force on water molecules, so that the glue solution does not contain free water, and has strong binding force and stable performance. Meanwhile, the glue solution contains a large amount of bound water, and has a flame retardant effect. And secondly, the calcium chloride solution promotes the gelatinization of the high amylose starch, the gelatinization difficulty is reduced, and the contained chloride ions have flame retardance. The addition of glycerol improves the fluidity of the mucus and ensures the stability of hot sizing.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention prepares the adhesive for the carton with good flame retardance. The adhesive has simple components, low cost, simple preparation process, no three-waste discharge and environmental protection.
(2) The flame-retardant adhesive prepared by the invention has excellent flame retardance and cohesiveness, and can meet the requirements of carton bonding and flame retardance.
(3) The flame-retardant adhesive prepared by the invention is convenient to use: the gel is solid gel at room temperature, and is convenient to store and transport; when in use, the adhesive can be applied by heating and melting.
Drawings
FIG. 1 is a diagram of the burning state of the paperboard coated with the flame retardant adhesive of example 1.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The reagents used in the examples are commercially available without specific reference.
Example 1
(1) Weighing 25g of calcium chloride, adding the calcium chloride into 50g of water, and stirring and dissolving the calcium chloride until the calcium chloride is clear to obtain a calcium chloride solution.
(2) 12.5g of high amylose corn starch (amylose content 70%) was weighed and added to the solution in (1) and stirred well to form a starch/salt suspension.
(3) And (3) heating the suspension in the step (2) to 75 ℃ while stirring, and heating for 2h to obtain a transparent colloidal fluid.
(4) And (3) weighing 5.36g of glycerol, adding the glycerol into the system in the step (4), continuously stirring for 1h at 75 ℃ to ensure that the glycerol and the glue solution are completely blended, and cooling to room temperature to obtain the flame-retardant adhesive.
(5) Weighing 10g of flame-retardant adhesive, heating at 80 ℃ for 30min until the adhesive flows dynamically, and coating the adhesive on the surface of a paperboard. Then the paper board is dried for 20min at 60 ℃ and can be firmly bonded. At this time, if the paper is forcibly torn, the paper is torn and cannot be peeled from the adhesive portion.
(6) The flame retardant adhesive coated paperboard is shown in figure 1 during burning. When burning, it can be observed that the flame is gradually extinguished at the coating site, and the adhesive coated area cannot be ignited.
Example 2
(1) 60g of anhydrous calcium chloride solid is weighed and added into 120g of water, and the mixture is stirred and dissolved until the mixture is clear, so that calcium chloride solution is obtained.
(2) Weighing 25g of high amylose corn starch (amylose content is 70%), adding the solution in (1), and stirring uniformly to form a starch/salt suspension.
(3) And (3) heating the suspension in the step (2) to 90 ℃ while stirring, and heating for 1h to obtain a transparent colloidal fluid.
(4) And (3) weighing 5.36g of glycerol, adding the glycerol into the system in the step (3), continuously stirring for 0.5h at 90 ℃ to ensure that the glycerol and the glue solution are completely blended, and cooling to room temperature to obtain the flame-retardant adhesive.
(5) Weighing 10g of flame-retardant adhesive, heating at 80 ℃ for 30min until the adhesive flows dynamically, and coating the adhesive on the surface of a paperboard. Then the paper board is dried for 20min at 60 ℃ and can be firmly bonded. At this time, if the paper is forcibly torn, the paper is torn and cannot be peeled from the adhesive portion.
(6) The flame retardant adhesive coated cardboard was similar to fig. 1 in the burning state, and it was observed that the flame was gradually extinguished at the coated area, and the adhesive coated area could not be ignited.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (9)

1. The preparation method of the environment-friendly flame-retardant adhesive for the cartons is characterized by comprising the following steps of:
adding high amylose starch into a calcium chloride solution, uniformly stirring, and heating to obtain transparent colloidal fluid; and then adding glycerol into the transparent colloidal fluid, preserving heat, stirring and blending, and cooling to obtain the environment-friendly flame-retardant adhesive for the cartons.
2. The preparation method of the environment-friendly flame-retardant adhesive for the cartons, as claimed in claim 1, is characterized in that:
the high amylose starch refers to natural starch with the amylose content of not less than 50 percent in starch.
3. The preparation method of the environment-friendly flame-retardant adhesive for the cartons, as claimed in claim 1, is characterized in that:
the mass ratio of calcium chloride to water in the calcium chloride solution is 1: 1.25-1: 2.5;
the dosage of the high amylose starch and the calcium chloride solution meets the following requirements: the mass ratio of the high amylose starch to the calcium chloride solution is not less than 1: 10.
4. The preparation method of the environment-friendly flame-retardant adhesive for the cartons, as claimed in claim 1, is characterized in that:
the temperature of the heating treatment is not lower than 65 ℃;
the time of the heat treatment is not shorter than 0.5 h.
5. The preparation method of the environment-friendly flame-retardant adhesive for the cartons, as claimed in claim 1, is characterized in that:
the glycerol is used in an amount such that the mass ratio of the glycerol to the high amylose is greater than 1: 19.
6. The preparation method of the environment-friendly flame-retardant adhesive for the cartons, as claimed in claim 1, is characterized in that:
the time for mixing and stirring is not less than 0.5 h.
7. An environment-friendly flame retardant adhesive for cartons, prepared by the method of any one of claims 1-6.
8. The use of the green, environmentally friendly flame retardant adhesive for cartons according to claim 7 in cartons.
9. A method of using the environmentally friendly flame retardant adhesive for cartons of claim 7, comprising the steps of:
heating the environment-friendly carton by using the flame-retardant adhesive to a flowable sol state in an environment with the temperature of more than 80 ℃, then directly coating the flame-retardant adhesive on the surface of the paperboard, then bonding other paperboards, and drying the carton in an environment with the temperature of more than 60 ℃ for 10-20min after bonding.
CN202110355652.7A 2021-04-01 2021-04-01 Preparation and application of environment-friendly flame-retardant adhesive for cartons Pending CN113150718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110355652.7A CN113150718A (en) 2021-04-01 2021-04-01 Preparation and application of environment-friendly flame-retardant adhesive for cartons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110355652.7A CN113150718A (en) 2021-04-01 2021-04-01 Preparation and application of environment-friendly flame-retardant adhesive for cartons

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114800762A (en) * 2022-05-27 2022-07-29 广州大学 Preparation method of green environment-friendly flame-retardant wood-plastic plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034015A (en) * 1987-11-19 1989-07-19 云南省轻工业科学研究所 Adhesive from canna ednlis starch and preparation thereof
CN103468162A (en) * 2013-09-29 2013-12-25 成都新柯力化工科技有限公司 Powder type white emulsion and preparation method thereof
CN106398586A (en) * 2016-10-14 2017-02-15 宝艺新材料股份有限公司 Low-temperature adhesive for corrugated cardboard production lines and method for preparing low-temperature adhesive
CN107384248A (en) * 2017-08-16 2017-11-24 成都市九华义远包装有限公司 Cardboard adhesive based on starch and preparation method thereof
CN112457801A (en) * 2020-11-24 2021-03-09 张家港市欣发包装有限责任公司 Low-temperature glue making method for reducing heat of composite forming of paperboard

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034015A (en) * 1987-11-19 1989-07-19 云南省轻工业科学研究所 Adhesive from canna ednlis starch and preparation thereof
CN103468162A (en) * 2013-09-29 2013-12-25 成都新柯力化工科技有限公司 Powder type white emulsion and preparation method thereof
CN106398586A (en) * 2016-10-14 2017-02-15 宝艺新材料股份有限公司 Low-temperature adhesive for corrugated cardboard production lines and method for preparing low-temperature adhesive
CN107384248A (en) * 2017-08-16 2017-11-24 成都市九华义远包装有限公司 Cardboard adhesive based on starch and preparation method thereof
CN112457801A (en) * 2020-11-24 2021-03-09 张家港市欣发包装有限责任公司 Low-temperature glue making method for reducing heat of composite forming of paperboard

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* Cited by examiner, † Cited by third party
Title
李子东等: "《现代胶粘技术手册》", 31 January 2002, 新时代出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114800762A (en) * 2022-05-27 2022-07-29 广州大学 Preparation method of green environment-friendly flame-retardant wood-plastic plate

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