CN113150716B - Water-based coating heat-sealing adhesive, coating process and application of water-based coating heat-sealing adhesive in medical dialyzing paper - Google Patents

Water-based coating heat-sealing adhesive, coating process and application of water-based coating heat-sealing adhesive in medical dialyzing paper Download PDF

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CN113150716B
CN113150716B CN202110281147.2A CN202110281147A CN113150716B CN 113150716 B CN113150716 B CN 113150716B CN 202110281147 A CN202110281147 A CN 202110281147A CN 113150716 B CN113150716 B CN 113150716B
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parts
water
heat
based coating
coating heat
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CN113150716A (en
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胡丁根
杨刚
郭晓峰
陆佩静
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Zhejiang Winbon Special Paper Co ltd
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Zhejiang Winbon Special Paper Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J125/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
    • C09J125/02—Homopolymers or copolymers of hydrocarbons
    • C09J125/04—Homopolymers or copolymers of styrene
    • C09J125/08—Copolymers of styrene
    • C09J125/14—Copolymers of styrene with unsaturated esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/08—Homopolymers or copolymers of acrylic acid esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/21—Paper; Textile fabrics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/28—Presence of paper
    • C09J2400/283—Presence of paper in the substrate
    • 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
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The invention discloses a water-based coating heat-sealing adhesive, a coating process and application thereof in medical dialyzing paper, and relates to the field of medical instrument packaging materials. The water-based coating heat-seal adhesive comprises, by weight, 40-60 parts of water, 16-25 parts of butyl acrylate, 15-23 parts of styrene, 1-3 parts of acrylic acid, 0.5-3 parts of (Z) -capsaicin, 0-4 parts of lavender dienoic acid, 0.5-2.5 parts of sodium dodecyl sulfate, 0.5-1.5 parts of alkylphenol polyoxyethylene ether and 0.15-0.6 part of ammonium persulfate. The water-based coating heat-sealing adhesive prepared by the invention has excellent water resistance, low content of volatile organic compounds, safety and environmental protection; the high-temperature and low-temperature resistant stability is good, and the storage period is longer; after being used for the medical dialyzing paper coating, the adhesive property is good, the material strength is high, and the medical dialyzing paper can be well heat-sealed with other materials.

Description

Water-based coating heat-sealing adhesive, coating process and application of water-based coating heat-sealing adhesive in medical dialyzing paper
Technical Field
The invention belongs to the field of medical instrument packaging materials, and particularly relates to a water-based coating heat-sealing adhesive, a coating process and application thereof in medical dialyzing paper.
Background
The conventional medical dialyzing paper is made of dehydrated wood pulp, the main body of the conventional medical dialyzing paper is made of wood cellulose, and the conventional medical dialyzing paper is widely used for packaging materials of medical sterilization bags and can be subjected to ethylene oxide high-temperature steam sterilization. Because the lignocellulose of the dialysis paper can not be subjected to heat sealing with other high polymer materials such as PETG, PVC, PS, PP, APET, PET, PE and the like, a coating heat sealing adhesive which can be used for the dialysis paper needs to be developed, so that the coating heat sealing adhesive can be subjected to heat sealing with other materials, and the coating heat sealing adhesive is used for packaging various medical materials such as syringes, catheters, tweezers, masks, gloves, breathing masks and the like as medical sterilized paper plastic bags or hard plastic-absorbing sealing cover materials of third class medical instruments.
At present, the medical dialyzing paper is coated and then used for flexible packaging, the heat sealing technology for PE and CPP is mature, the requirement on peel strength is low, the gluing amount is small, paper can not be broken in the packaging and peeling process after heat sealing, paper scraps are not generated, and clean peeling is realized. In the aspect of hard plastic uptake, because the lignocellulose of the dialyzing paper is brittle, the requirements on peel strength are high, the gluing amount is large, and paper fluff and paper scraps are easily generated in the opening process of the heat-sealed package. Therefore, a new coating formula and process are needed to be developed to realize the heat sealing with the hard plastic uptake (PETG, PVC, PS, APET, PET, etc.) and realize the clean stripping.
Disclosure of Invention
The invention aims to provide a water-based coating heat-sealing adhesive, a coating process and application thereof in medical dialyzing paper, wherein the water-based coating heat-sealing adhesive has excellent water resistance, high peel strength, low content of volatile organic compounds, safety and environmental protection; and the high temperature resistance and the low temperature resistance are good in stability, and the storage period is longer.
The technical scheme adopted by the invention for realizing the purpose is as follows:
the invention discloses application of (Z) -capsaicin in preparation of a water-based coating heat-sealing adhesive. The (Z) -capsaicin is adopted to modify the styrene-acrylic emulsion, the (Z) -capsaicin can participate in emulsion polymerization, so that the volatile organic compounds of the polymer are effectively reduced, basically no pungent smell exists, an environment-friendly and stable styrene-acrylic emulsion system is obtained, and the prepared water-based coating heat-sealing adhesive has excellent storage stability and freeze-thaw stability; meanwhile, the existence of the (Z) -capsaicin and other monomers are polymerized, so that the conversion rate of the monomers is improved, and the solid content of the heat-seal glue is obviously improved; after the water-based coating heat-sealing adhesive is coated on the medical dialyzing paper, the cohesiveness is good, and the stripping force is obviously improved. The water-based coating heat-sealing adhesive has a simple manufacturing process, does not need organic solvents, and is safe and environment-friendly.
The invention also discloses application of the (Z) -capsaicin in enhancing the peeling force and solid content of the water-based coating heat-seal glue.
An aqueous coating heat-seal adhesive comprising the (Z) -capsaicin of claim 1.
The heat-seal adhesive comprises, by weight, 40-60 parts of water, 16-25 parts of butyl acrylate, 15-23 parts of styrene, 1-3 parts of acrylic acid, 0.5-3 parts of (Z) -capsaicin, 0-4 parts of lavender dienoic acid, 0.5-2.5 parts of sodium dodecyl sulfate, 0.5-1.5 parts of alkylphenol polyoxyethylene ether and 0.15-0.6 part of ammonium persulfate. The addition of the Lavender dienoic acid can effectively reduce the water absorption of the adhesive film and enhance the water resistance of the adhesive film; in the presence of (Z) -capsaicin, the two components are compounded to enhance the stripping force of the heat-seal adhesive; and the existence of the Lavendienoic acid can further reduce the content of volatile organic compounds of the heat sealing adhesive and enhance the high-temperature stability and the storage life of the heat sealing adhesive.
The preparation method of the heat-seal adhesive comprises the following steps:
s1: dissolving sodium dodecyl sulfate and alkylphenol polyoxyethylene into tap water, and stirring and dissolving by using a glass rod to obtain an emulsifier solution; dissolving ammonium persulfate in tap water to obtain an initiator solution;
s2: mixing reaction monomers according to the parts by weight, adding 1/2 emulsifier solution, and stirring at a high speed for 0.5-1 h to obtain a pre-emulsion;
s3: slowly heating the rest 1/2 emulsifier solution to 80-85 ℃, slowly dripping 1/2 pre-emulsion and 1/4 initiator solution, and preserving heat for 0.5-1 h after dripping is finished; continuously and slowly dripping the residual 1/2 pre-emulsion, and dripping 1/4 initiator solution every 0.5 h;
s4: after the emulsion and the initiator solution are completely dripped, preserving heat for 1-2 h, then heating to 90-93 ℃, and continuously preserving heat for 1-1.5 h; and after the reaction is finished, when the temperature of the system is reduced to 40-45 ℃, adjusting the pH value to 6-7 by adopting a saturated sodium bicarbonate solution, cooling to room temperature, and filtering to obtain the water-based coating heat-sealing adhesive.
The invention also discloses the application of the water-based coating heat-sealing adhesive in medical dialyzing paper.
The coating process of the water-based coating heat-seal adhesive comprises the following steps:
coating glue on a wire mesh roller, transferring the water-based coating heat-sealing glue onto medical dialyzing paper through a 30-wire mesh roller, wherein the temperature of a drying tunnel is 40-50 ℃, the coating speed is 15-80 m/min, and the coating process comprises the following steps: unreeling, gluing, drying, pickling, rinsing, drying and reeling. The water-based coating heat-sealing adhesive is good in cohesiveness and high in material strength after being used for coating medical dialyzing paper, can be subjected to heat sealing with other materials (such as PET, PETG, PVC, APET, PS and the like), and is used for packaging various medical materials such as syringes, catheter tweezers, masks, gloves, breathing masks and the like as a medical sterilizing paper plastic bag or a hard plastic-absorbing sealing cover material of a third class of medical apparatus. The coating process provided by the invention is simple, convenient to operate, low in cost and easy for large-scale production.
The gluing quality of the water-based coating heat-sealing glue on the dialyzing paper is 1.5-4.5% of that of the original dialyzing paper.
The invention also discloses application of the coated medical dialyzing paper obtained by the coating process of the water-based coating heat-sealing adhesive to a medical sterilization packaging material.
Compared with the prior art, the invention has the following beneficial effects:
the (Z) -capsaicin is adopted to modify the styrene-acrylic emulsion, so that the volatile organic compounds of the polymer are effectively reduced, the irritation odor is basically avoided, and the prepared water-based coating heat-sealing adhesive has excellent storage stability and freeze-thaw stability; meanwhile, the existence of (Z) -capsaicin obviously improves the solid content of the heat-seal glue; after the water-based coating heat-sealing adhesive is coated on the medical dialyzing paper, the cohesiveness is good, and the stripping force is obviously improved. In addition, the water resistance of the adhesive film can be effectively enhanced by adding the Lavender dienoic acid; in the presence of (Z) -capsaicin, the two components are compounded to enhance the stripping force of the heat-seal adhesive; and the existence of the Lavendienoic acid can further reduce the content of volatile organic compounds of the heat sealing adhesive and enhance the high-temperature stability and the storage life of the heat sealing adhesive. The water-based coating heat-sealing adhesive has a simple manufacturing process, does not need an organic solvent, and is safe and environment-friendly; after the medical dialyzing paper coating is used for medical dialyzing paper coating, the adhesive property is good, the material strength is high, and the medical dialyzing paper coating can be well heat-sealed with other materials (PET, PETG, PVC, APET, PS and the like).
Therefore, the invention provides the water-based coating heat-sealing adhesive, the coating process and the application thereof in the medical dialyzing paper, and the water-based coating heat-sealing adhesive has excellent water resistance, high peel strength, low content of volatile organic compounds, safety and environmental protection; and the high temperature resistance and the low temperature resistance are good in stability, and the storage period is longer.
Drawings
FIG. 1 shows the results of IR spectroscopy in test example 1 of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 1.5 parts of acrylic acid, 2.5 parts of (Z) -capsaicin, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene ether and 0.45 part of ammonium persulfate.
Preparation of a water-based coating heat-sealing adhesive:
s1: dissolving sodium dodecyl sulfate and alkylphenol polyoxyethylene into tap water, and stirring and dissolving by using a glass rod to obtain an emulsifier solution; dissolving ammonium persulfate in tap water to obtain an initiator solution;
s2: taking all reaction monomers (butyl acrylate, styrene, acrylic acid and (Z) -capsaicin) according to the weight parts, mixing, adding 1/2 emulsifier solution, and stirring at a high speed for 0.5h under the action of a mechanical stirrer to obtain pre-emulsion;
s3: putting the rest 1/2 emulsifier solution into a four-necked bottle provided with a constant pressure dropping funnel, a thermometer, a mechanical stirring rod and a reflux condenser tube to serve as a base solution, slowly heating to 82 ℃, then slowly dropping 1/2 pre-emulsion and 1/4 initiator solution, and preserving heat for 0.5h after dropping; continuously and slowly dropwise adding the residual 1/2 pre-emulsion, and dropwise adding 1/4 initiator solution every 0.5 h;
s4: after all the emulsion is dripped, preserving heat for 1h, then heating to 92 ℃, and continuously preserving heat for 1.5 h; and after the reaction is finished, when the temperature of the system is reduced to 43 ℃, adjusting the pH value to 6-7 by using a saturated sodium bicarbonate solution, cooling to room temperature, and filtering by using a gauze or a filter screen to obtain the water-based coating heat-sealing adhesive.
The coating process of the water-based coating heat-seal adhesive comprises the following steps:
gluing and coating on a wire mesh roller, transferring the water-based coating heat-sealing adhesive onto medical dialyzing paper through a 30-wire mesh roller, wherein the drying tunnel temperature is 40 ℃, the coating speed is 50m/min, and the coating process comprises the following steps: unreeling, gluing, drying, pickling, rinsing, drying and reeling. Wherein the gluing quality of the water-based coating heat-sealing glue on the dialyzing paper is 3.6 percent of that of the original dialyzing paper.
Example 2:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 42 parts of water, 18 parts of butyl acrylate, 19 parts of styrene, 1 part of acrylic acid, 1.5 parts of (Z) -capsaicin, 1 part of lauryl sodium sulfate, 1 part of alkylphenol polyoxyethylene ether and 0.25 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Example 3:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 56 parts of water, 24 parts of butyl acrylate, 22 parts of styrene, 2.5 parts of acrylic acid, 3 parts of (Z) -capsaicin, 2.5 parts of sodium dodecyl sulfate, 1.5 parts of alkylphenol polyoxyethylene and 0.5 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Example 4:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 47 parts of water, 20 parts of butyl acrylate, 18 parts of styrene, 1.2 parts of acrylic acid, 2 parts of (Z) -capsaicin, 1.2 parts of sodium dodecyl sulfate, 1.1 parts of alkylphenol polyoxyethylene and 0.35 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Example 5:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 1.5 parts of acrylic acid, 2.5 parts of (Z) -capsaicin, 3 parts of Lavender dienoic acid, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene ether and 0.45 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Example 6:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 1.5 parts of acrylic acid, 3 parts of Lavender dienoic acid, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene and 0.45 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Comparative example 1:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 1.5 parts of acrylic acid, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene and 0.45 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Comparative example 2:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 1.5 parts of acrylic acid, 3 parts of vinyl acetate, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene and 0.45 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal glue is the same as that of the example 1.
Comparative example 3:
the raw material components of the water-based coating heat-sealing adhesive comprise, by weight, 50 parts of water, 22 parts of butyl acrylate, 20 parts of styrene, 2.5 parts of acrylic acid, 3 parts of N-hydroxymethyl acrylamide, 2 parts of sodium dodecyl sulfate, 1 part of alkylphenol polyoxyethylene and 0.45 part of ammonium persulfate.
A water-based coating heat-seal adhesive was prepared in the same manner as in example 1.
The coating process of the water-based coating heat-seal adhesive is the same as that of the example 1.
Test example 1:
1. infrared Spectrum test (FTIR)
An infrared spectrometer: manufactured by Nicolet corporation, usa, model number: IR 550; and (3) preparing a sample by a potassium bromide tabletting method. The polymer was first dissolved in THF to make a 1% solution, coated on potassium bromide tablets, and the solvent was evaporated to dryness at room temperature. The scanning wavelength range is 400-4000 cm -1 The number of scans was 30.
The above test was carried out on the water-based coating heat-seal adhesives obtained in comparative example 1 and example 1, and the results are shown in FIG. 1. As can be seen from the graph, the spectrum of the sample of comparative example 1 is 3150cm -1 ~2960cm -1 The range of the absorption peak is C-H stretching vibration absorption peak on benzene ring, wherein, 2960cm -1 Nearby is-CH 3 The stretching vibration absorption peak of (1); 1735cm -1 The vicinity of the peak is a C = O stretching vibration absorption peak in butyl acrylate ester group, 1499cm -1 The nearby part is a vibration absorption peak of a benzene ring framework; 1460cm -1 The vicinity is a vibration absorption peak of COO-in acrylic acid; at 1160cm -1 ~970cm -1 The range has a C-H in-plane bending vibration absorption peak of a benzene ring; 728cm -1 The vicinity is the characteristic peak of C-H out-of-plane bending of the benzene ring. Compared with the sample of the comparative example 1, the infrared spectrum of the water-based coating heat-sealing adhesive prepared in the example 1 is 3432cm -1 The characteristic peak of N-H appears nearby, 2890cm -1 near-CH 2 The characteristic absorption peak intensity of (A) is enhanced, which indicates that all four monomers participate in copolymerization.
2. Solid content
Weighing 2.5g of sample from a clean and tidy glass surface dish, slightly shaking to enable the heat sealing glue to be evenly spread on the surface dish, then putting the glass surface dish into a blowing type drying box at 105 +/-2 ℃, drying the glass surface dish to constant weight, putting the glass surface dish into a dryer, cooling the glass surface dish to room temperature, and weighing the glass surface dish. The solid content is calculated according to the following formula:
solid content = (m) 3 －m 1 ）/（m 2 －m 1 ）×100%
Wherein m is 1 Mass of glass watch glass, g; m is 2 G is the sum of the quality of the glass surface vessel and the heat sealing glue; m is 3 G is the sum of the quality of the glass surface vessel and the dried adhesive film of the heat sealing adhesive.
The heat-seal adhesives prepared in comparative examples 1-2 and examples 1-6 were subjected to the above test, and the results are shown in Table 1:
table 1 solids content data
Sample (I) Solids content/%
Comparative example 1 43.43
Comparative example 2 41.24
Comparative example 3 42.73
Example 1 50.91
Example 2 49.14
Example 3 50.45
Example 4 50.03
Example 5 50.72
Example 6 44.41
As can be seen from Table 1, the solid content of the heat-seal adhesive prepared in example 1 is higher than that of comparative examples 1-3, which shows that the existence of (Z) -capsaicin causes polymerization with other monomers, so that the conversion rate of the monomers is improved, and the solid content of the heat-seal adhesive is obviously improved. The effect of example 5 is equivalent to that of example 1, and the effect of example 6 is equivalent to that of comparative examples 1-3, which shows that the addition of the Lavenudadienone has no negative influence on the increase of the solid content of the heat-seal adhesive.
Test example 2:
1. water absorption rate
Taking a clean and tidy glass slide, weighing the glass slide, and recording the mass as m 1 Uniformly coating the sample glue on a glass slide (thickness of about 1 μm) with a glass rod, placing in a blowing type drying oven at 105 + -2 deg.C, oven drying to constant weight, taking out, placing in a dryer to constant temperature, weighing its mass as m 2 . Then, the place of the glass slide coated with the sample glue is completely soaked in a beaker filled with distilled water, the glass slide is taken out every 15min, the water on the surface is sucked dry by filter paper, the mass is weighed and recorded as m 3 。
The water absorption was calculated according to the following formula:
water absorption = (m) 3 －m 2 ）/（m 2 －m 1 ）×100%
Wherein m is 1 Mass of slide, g; m is 2 G is the sum of the mass of the glass slide and the mass of the adhesive film; m is 3 Is the mass after absorption, g.
The heat-seal adhesives prepared in comparative examples 1-2 and examples 1-6 were subjected to the above test, and the results are shown in Table 2:
table 2 water absorption test results
Sample (I) Water absorption/%)
Comparative example 1 10.7
Comparative example 2 9.8
Comparative example 3 4.2
Example 1 9.3
Example 2 10.1
Example 3 9.1
Example 4 9.5
Example 5 2.1
Example 6 2.7
As can be seen from Table 3, the water absorption of the heat-seal adhesive prepared in example 1 is equivalent to that of comparative examples 1-2, the effect of example 5 is better than that of example 1, and the effect of example 6 is better than that of comparative example 1, which shows that the water absorption of the heat-seal adhesive can be effectively reduced and the water resistance of the heat-seal adhesive can be remarkably improved by adding the Lavenudadienone acid.
2. Content of Volatile Organic Compounds (VOC)
The test was carried out using a gas chromatograph model Agilent Technologies 68020. First, standard curves are made for the test results of standard concentrations 0%, 0.025%, 0.05%, 0.1% and 0.5%, and then the sample gum is passed through the standard curves to find out the residual monomer content.
The heat-seal adhesives prepared in comparative examples 1-2 and examples 1-6 were subjected to the above test, and the results are shown in Table 3:
TABLE 3 VOC content
Sample (I) Residual monomer content/ppm
Comparative example 1 2014
Comparative example 2 2118
Comparative example 3 304.8
Example 1 213.4
Example 2 229.1
Example 3 207.6
Example 4 221.9
Example 5 204.7
Example 6 951.5
As can be seen from Table 3, the residual monomer content of the heat-seal adhesive prepared in example 1 is less than that of comparative examples 1-3, which indicates that the existence of (Z) -capsaicin polymerizes with other monomers to form a stable network structure, and the content of volatile organic compounds in the heat-seal adhesive can be remarkably reduced. Example 6 is more effective than comparative example 1, indicating that the addition of Lavendienoic acid also reduces the amount of volatile organic compounds in the heat seal.
3. Stability of
The storage stability of the heat-seal adhesive is measured according to GB/T6753.3-1986;
the freeze-thaw stability of the heat-seal adhesive is determined according to GB/T9268-2008;
and (3) testing the high-temperature stability: the heat-seal glue sample is placed in a closed glass bottle, heat preservation is carried out for 5 days and nights at the temperature of 60 ℃, and state change is observed and recorded. If no change occurs, the high-temperature stability of the sample is good; if a precipitate or gel appears, it is filtered off, dried and weighed. The more gel in the dry state, the poorer the high temperature stability.
The heat-seal adhesives prepared in comparative examples 1-2 and examples 1-6 were subjected to the above test, and the results are shown in Table 4:
table 4 stability test results
Figure 1
As can be seen from Table 4, the storage stability and the freeze-thaw stability of the heat-seal adhesive prepared in example 1 are better than those of comparative examples 1-3, and the high temperature resistance stability of the heat-seal adhesive is not significantly different from those of comparative examples 1-3, which indicates that the storage stability and the freeze-thaw stability of the heat-seal adhesive can be significantly enhanced by the presence of (Z) -capsaicin, and the improvement of the heat stability is not significantly affected; the storage stability and the high-temperature stability of the heat-seal adhesive prepared in the embodiment 5 are better than those of the embodiment 1, the effect of the embodiment 6 is better than those of the comparative examples 1-3, the freeze-thaw stability of the heat-seal adhesive prepared in the embodiment 5 is equivalent to that of the embodiment 1, and the effect of the embodiment 6 is equivalent to that of the comparative examples 1-3, which shows that the storage stability and the high-temperature stability of the heat-seal adhesive can be effectively improved by adding the Lavenodienone acid, but the improvement of the freeze-thaw stability of the heat-seal adhesive is not obviously influenced.
Test example 3:
coating common commercial coating glue on medical dialyzing paper respectively, wherein the coating process is basically the same as that of the example 1 and is used as a control group; the experimental groups were: the water-based coating heat-seal adhesive prepared in the examples 1-6 and the comparative examples 1-2. And then respectively carrying out heat sealing on the dialyzing paper coated with the coating adhesive and the PE/PET composite film at the heat sealing temperature of 140 ℃ for 1.5s at the heat sealing pressure of 4.5bar, wherein the heat sealing surface is a PE surface, and then carrying out peel strength test according to ASTM F8806. The test results are shown in table 5:
TABLE 5 peel strength data for coated paper and PE/PET composite films
Test specimen Peel strength (N/15 mm)
Control group 1.4
Comparative example 1 3.9
Comparative example 2 4.2
Comparative example 3 3.8
Example 1 8.9
Example 2 8.3
Example 3 9.1
Example 4 8.5
Example 5 15.8
Example 6 6.1
As can be seen from Table 5, the residual monomer content of the heat-seal adhesive prepared in example 1 is less than that of comparative examples 1-3, which indicates that the peel strength of the heat-seal adhesive can be remarkably enhanced by the presence of (Z) -capsaicin. The effect of example 5 is better than that of example 1, and the effect of example 6 is better than that of comparative examples 1-3, which shows that the addition of the Lavendienoic acid has a positive effect on the improvement of the peeling force of the heat seal adhesive, and the combination of the two has a better effect on the improvement of the peeling force of the heat seal adhesive in the presence of (Z) -capsaicin.
Conventional techniques in the above embodiments are known to those skilled in the art, and therefore, will not be described in detail herein.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

  1. The application of (Z) -capsaicin in preparing the water-based coating heat-sealing adhesive comprises, by weight, 40-60 parts of water, 16-25 parts of butyl acrylate, 15-23 parts of styrene, 1-3 parts of acrylic acid, 0.5-3 parts of (Z) -capsaicin, 0-4 parts of Lavender dienoic acid, 0.5-2.5 parts of sodium dodecyl sulfate, 0.5-1.5 parts of alkylphenol polyoxyethylene ether and 0.15-0.6 part of ammonium persulfate.
  2. The application of (Z) -capsaicin in enhancing the peeling force and solid content of the water-based coating heat-seal adhesive comprises, by weight, 40-60 parts of water, 16-25 parts of butyl acrylate, 15-23 parts of styrene, 1-3 parts of acrylic acid, 0.5-3 parts of (Z) -capsaicin, 0-4 parts of Lavender dienoic acid, 0.5-2.5 parts of sodium dodecyl sulfate, 0.5-1.5 parts of alkylphenol polyoxyethylene ether and 0.15-0.6 part of ammonium persulfate.
  3. 3. The water-based coating heat-sealing adhesive comprises, by weight, 40-60 parts of water, 16-25 parts of butyl acrylate, 15-23 parts of styrene, 1-3 parts of acrylic acid, 0.5-3 parts of (Z) -capsaicin, 0-4 parts of lavender dienoic acid, 0.5-2.5 parts of sodium dodecyl sulfate, 0.5-1.5 parts of alkylphenol ethoxylates and 0.15-0.6 part of ammonium persulfate.
  4. 4. The water-based coating heat-seal adhesive of claim 3, wherein: the preparation method of the heat-seal adhesive comprises the following steps:
    s1: dissolving sodium dodecyl sulfate and alkylphenol polyoxyethylene into tap water, and stirring and dissolving by using a glass rod to obtain an emulsifier solution; dissolving ammonium persulfate in tap water to obtain an initiator solution;
    s2: mixing reaction monomers according to the parts by weight, adding 1/2 of emulsifier solution, and stirring at a high speed for 0.5-1 h to obtain pre-emulsion;
    s3: slowly heating the rest 1/2 emulsifier solution to 80-85 ℃, slowly dripping 1/2 pre-emulsion and 1/4 initiator solution, and preserving heat for 0.5-1 h after dripping is finished; continuously and slowly dripping the residual 1/2 pre-emulsion, and dripping 1/4 initiator solution every 0.5 h;
    s4: after the emulsion and the initiator solution are completely dripped, preserving heat for 1-2 h, then heating to 90-93 ℃, and continuously preserving heat for 1-1.5 h; after the reaction is finished, when the temperature of the system is reduced to 40-45 ℃, adjusting the pH value to 6-7 by adopting a saturated sodium bicarbonate solution, cooling to room temperature, and filtering to obtain the water-based coating heat-sealing adhesive;
    the reactive monomers include butyl acrylate, styrene, acrylic acid, (Z) -capsaicin.
  5. 5. Use of the water-based coating heat-seal adhesive according to any one of claims 3 to 4 in medical dialysis paper.
  6. 6. The process for coating the aqueous coating heat-seal adhesive of claim 3, comprising:
    gluing and coating on a wire mesh roller, transferring the water-based coating heat-sealing adhesive onto medical dialyzing paper through a 30-wire mesh roller, wherein the drying tunnel temperature is 40-50 ℃, the coating speed is 15-80 m/min, and the coating process comprises the following steps: unreeling, gluing, drying, pickling, rinsing, drying and reeling.
  7. 7. The coating process of the water-based coating heat-seal adhesive of claim 6, which is characterized in that: the gluing quality of the water-based coating heat-sealing glue on the dialyzing paper is 1.5-4.5% of that of the original dialyzing paper.
  8. 8. Use of the coated medical dialysis paper obtained by the process for coating the water-based coated heat-sealing adhesive according to claim 6 in medical sterilized packaging materials.
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US5397385A (en) * 1994-03-28 1995-03-14 Watts; James L. Anti-fouling coating composition containing capsaicin
US8877882B1 (en) * 2013-10-04 2014-11-04 Rochal Industries Llp Non-self-adherent coating materials
CN103952096B (en) * 2014-03-24 2016-04-13 铜陵市松马食品包装机械制造有限责任公司 A kind of low-temperature hot-seal adhesive and preparation method thereof
CN107254098A (en) * 2017-07-07 2017-10-17 刘昌华 Preservative film containing capsaicine and its application in food fresh keeping
CN108341909A (en) * 2018-03-25 2018-07-31 华南理工大学 A kind of antibacterial capsaicine is acrylic resin modified and its preparation method and application
CN109321171B (en) * 2018-09-26 2020-06-05 上海乘鹰新材料有限公司 Water-based medical dialyzing paper heat-sealing adhesive and preparation method thereof

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