CN114196332A - Preparation process of hot melt adhesive film for adhering PP (polypropylene) material - Google Patents

Preparation process of hot melt adhesive film for adhering PP (polypropylene) material Download PDF

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Publication number
CN114196332A
CN114196332A CN202111594851.XA CN202111594851A CN114196332A CN 114196332 A CN114196332 A CN 114196332A CN 202111594851 A CN202111594851 A CN 202111594851A CN 114196332 A CN114196332 A CN 114196332A
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hot
melt adhesive
adhesive film
raw material
viscous matrix
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林正
尤世明
俞峰
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Xinxu Polymer Material Suzhou Co ltd
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Xinxu Polymer Material Suzhou 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/10—Adhesives in the form of films or foils without carriers
    • 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
    • C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09J103/02—Starch; Degradation products thereof, e.g. dextrin
    • 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
    • C09J11/04—Non-macromolecular additives inorganic
    • 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
    • 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
    • C09J11/08—Macromolecular additives
    • 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
    • C09J129/00—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 alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
    • C09J129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09J161/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C09J161/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention is suitable for the technical field of hot melt adhesive films, and provides a preparation process of a hot melt adhesive film adhered with a PP material, which comprises the following steps: s1, mixing melamine resin, mineralized nano powder, an initiator, an anti-aging agent, a viscosity regulator and an antioxidant at high temperature to obtain a viscous matrix; s2, fully stirring and mixing the refined rice hull powder, the corn starch, the polyvinyl alcohol, the tackifying resin and the heat stabilizer for reaction, and then carrying out high-temperature polymerization to obtain a hot melt adhesive raw material; s3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material; s4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on a matrix layer, and cooling and forming to obtain a hot-melt adhesive film; according to the invention, the initiator is added into the raw materials, so that the adhesion effect of the viscous matrix can be enhanced; the anti-aging agent is added into the raw materials, so that the service life of the viscous matrix can be obviously prolonged, and the antioxidant can be added into the viscous matrix to improve the oxidation resistance of the viscous matrix.

Description

Preparation process of hot melt adhesive film for adhering PP (polypropylene) material
Technical Field
The invention belongs to the technical field of hot melt adhesive films, and particularly relates to a preparation process of a hot melt adhesive film adhered with a PP material.
Background
The hot melt adhesive is a plastic adhesive, the physical state of which changes along with the change of temperature within a certain temperature range, and the chemical property of which is unchanged, is nontoxic and tasteless, and belongs to an environment-friendly chemical product. The product is solid, so the product is convenient to package, transport and store, and has no solvent, pollution and toxicity; and the production process is simple, the added value is high, the bonding strength is high, the speed is high, and the like.
In the traditional preparation process of the hot melt adhesive film, the adhesive property of the adhesive matrix is not high, and the effects of adhesive activity, oxidation resistance and the like of the adhesive matrix are not ideal enough, so that the market demand can not be met.
Disclosure of Invention
The invention provides a preparation process of a hot melt adhesive film for adhering a PP material, and aims to solve the problems that in the traditional preparation process of the hot melt adhesive film, the adhesive property of an adhesive matrix is not high, the effects of adhesive activity, oxidation resistance and the like of the adhesive matrix are not ideal, and the market demand cannot be met.
The invention is realized in such a way that a preparation process of a hot melt adhesive film for adhering PP materials comprises the following steps:
s1, mixing melamine resin, mineralized nano powder, an initiator, an anti-aging agent, a viscosity regulator and an antioxidant at high temperature, and continuously stirring and adding a sodium hydroxide solution in the process of gradually cooling to obtain a viscous matrix;
s2, fully stirring and mixing the refined rice hull powder, corn starch, polyvinyl alcohol, tackifying resin and heat stabilizer for reaction, and then carrying out high-temperature polymerization at 100-300 ℃ to obtain a hot melt adhesive raw material;
s3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously heating the viscous matrix;
and S4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on the matrix layer, and cooling and forming to obtain the hot-melt adhesive film.
Preferably, the melamine resin is a mixture of melamine and formaldehyde.
Preferably, the initiator consists of dicumyl oxide, pyrogallol and ethyl cellulose; the mixing mass ratio is 9: 2: 2.
preferably, the anti-aging agent consists of ditert-butyl-p-cresol and isopropyl titanate; the mixing mass ratio is 6: 1.
preferably, the antioxidant consists of phosphite ester, trimethylolpropane trimethacrylate and amino trimethylene phosphonic acid tetrasodium; the mixing mass ratio is 7: 2: 1.
preferably, the mineralized nanopowder consists of hydrotalcite, titanium dioxide and calamine; the mixing mass ratio is 2: 1: 1.
preferably, during the high-temperature contact gasification operation of the hot melt adhesive raw material and the synchronous heating of the viscous matrix, part of the hot melt adhesive raw material after the high-temperature contact gasification operation is in contact with and mixed with part of the viscous matrix.
Preferably, the cooling and forming in step S4 specifically includes: the polymer bottom was cooled using a cooling device waiting to drop to the crystallization temperature and the cooling was stopped.
Preferably, the heat stabilizer is one or more than two of calcium stearate and zinc stearate.
Preferably, the viscosity regulator is one or a mixture of several of paraffin, synthetic wax of saso, microcrystalline wax, ceresin and low molecular polyethylene wax.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the initiator is added into the raw materials, so that the adhesion effect of the viscous matrix can be enhanced; the anti-aging agent is added into the raw materials, so that the service life of the viscous matrix can be obviously prolonged, and the antioxidant can be added into the viscous matrix to improve the oxidation resistance of the viscous matrix.
(2) The rice husk is used as the low-cost filler, so that the hot melt adhesive prepared by the method is favorable for combining the hot melt adhesive raw material with the viscous matrix and does not influence the later recovery.
(3) The invention firstly carries out separate reaction on the raw materials for providing the viscosity of the hot melt adhesive film and the glue-forming raw materials, then carries out partial high-temperature polymerization reaction after the contact type gasification reaction, and carries out injection extrusion in a way that the viscous matrix coats the hot melt raw materials, so that the viscous matrix is more positioned on the surface of the hot melt adhesive film, the viscosity performance of the hot melt adhesive film is improved, and the range of the adhered objects of the hot melt adhesive film is enlarged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, the present invention provides a technical solution:
a preparation process of a hot melt adhesive film for adhering PP materials comprises the following steps:
s1, mixing the melamine resin, the mineralized nano powder, the initiator, the anti-aging agent, the viscosity regulator and the antioxidant at high temperature, and continuously stirring and adding the sodium hydroxide solution in the process of gradually cooling to obtain the viscous matrix.
Wherein the addition of sodium hydroxide solution adjusts the PH of the mixture. The viscosity regulator is one or more of paraffin, synthetic wax of sand rope, microcrystalline wax, ceresin and low molecular polyethylene wax.
S2, fully stirring and mixing the refined rice hull powder, the corn starch, the polyvinyl alcohol, the tackifying resin and the heat stabilizer for reaction, and then carrying out high-temperature polymerization at 100 ℃ to obtain the hot melt adhesive raw material.
Wherein the heat stabilizer is one or more than two of calcium stearate and zinc stearate.
And S3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously heating the viscous matrix.
Wherein, in the process of carrying out high-temperature contact gasification operation on the hot melt adhesive raw material and synchronously heating the viscous matrix, the hot melt raw material after the high-temperature contact gasification operation is partially contacted and mixed with the viscous matrix.
And S4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on the matrix layer, and cooling and forming to obtain the hot-melt adhesive film.
The cooling and forming in the step S4 specifically includes: the polymer bottom was cooled using a cooling device waiting to drop to the crystallization temperature and the cooling was stopped.
The invention firstly carries out separate reaction on the raw materials for providing the viscosity of the hot melt adhesive film and the glue-forming raw materials, then carries out partial high-temperature polymerization reaction after the contact type gasification reaction, and carries out injection extrusion in a way that the viscous matrix coats the hot melt raw materials, so that the viscous matrix is more positioned on the surface of the hot melt adhesive film, the viscosity effect of the hot melt adhesive film is improved, and the range of the adhered objects of the hot melt adhesive film is enlarged.
The melamine resin selected is a mixture of melamine and formaldehyde, and the addition of the melamine resin improves the durability of the adhesive matrix.
The mineralized nano powder is prepared from hydrotalcite, titanium dioxide and calamine according to the mass ratio of 4: 2: 1. The mineralized nano powder prepared after the hydrotalcite, the titanium dioxide and the calamine are subjected to mineralization treatment in the proportion is used in the viscous matrix of the application, and the application of the mineralized nano powder to the hot melt adhesive film can enhance the wear resistance of the hot melt adhesive film.
The preparation method of the mineralized nano powder comprises the following steps: sodium chloride, aluminum potassium sulfate, sodium bicarbonate, potassium iodide, calcium chloride, ferric trichloride, sodium fluosilicate and hydroxypropyl methylcellulose in a mass ratio of 7: 1: 3: 2: 5: 2: 1: 1 is dissolved in distilled water which accounts for 15 times of the total mass of the mineralized liquid, carbon dioxide gas is continuously introduced for 2min at the temperature of 43 ℃, and the pH value is adjusted to 6.2 by acetic acid to obtain the mineralized liquid; grinding hydrotalcite, titanium dioxide and calamine into powder of 30nm, uniformly mixing, adding the powder into a mineralization liquid, arranging 8-12 groups of neodymium iron boron magnetic poles on the periphery of the inner wall of a reaction tank, enabling the magnetic field intensity to be 2500 gauss, enabling the distance between every two adjacent magnetic poles to be 8cm, centrally stirring at the speed of 150rpm for 10min, washing after mineralization is finished, and drying to obtain the mineralization nanometer powder.
The mineralization liquid prepared according to the proportion is stable and uniform in components, the stability of the mineralization liquid is improved under the action of sodium fluosilicate and hydroxypropyl methylcellulose, then the mineralization treatment of hydrotalcite, titanium dioxide and calamine is carried out by using the prepared mineralization liquid, meanwhile, the mineralization effect of the mineralization liquid on hydrotalcite, titanium dioxide and calamine is improved under the action of a plurality of groups of Ru iron boron magnetic poles, the action effect of mineralization nano powder of the mineralization liquid can be effectively enhanced, and the wear resistance of the prepared adhesive is obviously enhanced after the prepared adhesive is used in a hot melt adhesive film.
The initiator is selected from dicumyl peroxide, pyrogallol and ethyl cellulose, and the mixing mass ratio of the dicumyl peroxide to the pyrogallol to the ethyl cellulose is 9: 2: the pyrogallol can promote the etherification activity of the melamine resin and enhance the adhesion of the melamine resin, the ethyl cellulose can assist in enhancing the initiation effect of dicumyl peroxide and enhance the adhesion effect of the adhesive, and the initiator in the proportion can remarkably promote the synthesis of the adhesive and enhance the adhesion performance of the adhesive.
The anti-aging agent is selected from di-tert-butyl-p-cresol and isopropyl titanate, and the mixing mass ratio of the di-tert-butyl-p-cresol to the isopropyl titanate is 6: 1, isopropyl titanate can improve the action effect of di-tert-butyl and the adhesion effect of the adhesive, and the anti-aging agent in the proportion can obviously improve the durability of the hot melt adhesive film after the adhesive is used and prolong the service life of the hot melt adhesive film.
The antioxidant is prepared from phosphite ester, trimethylolpropane trimethacrylate and amino trimethylene phosphonic acid tetrasodium, and the mixing mass ratio of the phosphite ester to the trimethylolpropane trimethacrylate to the amino trimethylene phosphonic acid tetrasodium is 7: 2: 1. the phosphite ester can improve the oxidation resistance of the adhesive, the trimethylolpropane trimethacrylate can assist in enhancing the action effect of the phosphite ester, and meanwhile, the tetrasodium amino trimethylene phosphonate can improve the mixing degree of each component, so that each substance component of the adhesive is more stable.
The rice husk and corn starch are used as low-cost fillers for the hot melt adhesive raw material, so that the combination of the hot melt adhesive raw material and the viscous matrix is facilitated, and the later recovery is not influenced.
Example 2
Referring to fig. 1, the present invention provides a technical solution:
a preparation process of a hot melt adhesive film for adhering PP materials comprises the following steps:
s1, mixing the melamine resin, the mineralized nano powder, the initiator, the anti-aging agent, the viscosity regulator and the antioxidant at high temperature, and continuously stirring and adding the sodium hydroxide solution in the process of gradually cooling to obtain the viscous matrix.
Wherein the addition of sodium hydroxide solution adjusts the PH of the mixture. The viscosity regulator is one or more of paraffin, synthetic wax of sand rope, microcrystalline wax, ceresin and low molecular polyethylene wax.
S2, fully stirring and mixing the refined rice hull powder, the corn starch, the polyvinyl alcohol, the tackifying resin and the heat stabilizer for reaction, and then carrying out high-temperature polymerization at 200 ℃ to obtain the hot melt adhesive raw material.
Wherein the heat stabilizer is one or more than two of calcium stearate and zinc stearate.
And S3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously heating the viscous matrix.
Wherein, in the process of carrying out high-temperature contact gasification operation on the hot melt adhesive raw material and synchronously heating the viscous matrix, the hot melt raw material after the high-temperature contact gasification operation is partially contacted and mixed with the viscous matrix.
And S4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on the matrix layer, and cooling and forming to obtain the hot-melt adhesive film.
The cooling and forming in the step S4 specifically includes: the polymer bottom was cooled using a cooling device waiting to drop to the crystallization temperature and the cooling was stopped.
Example 3
Referring to fig. 1, the present invention provides a technical solution:
a preparation process of a hot melt adhesive film for adhering PP materials comprises the following steps:
s1, mixing the melamine resin, the mineralized nano powder, the initiator, the anti-aging agent, the viscosity regulator and the antioxidant at high temperature, and continuously stirring and adding the sodium hydroxide solution in the process of gradually cooling to obtain the viscous matrix.
Wherein the addition of sodium hydroxide solution adjusts the PH of the mixture. The viscosity regulator is one or more of paraffin, synthetic wax of sand rope, microcrystalline wax, ceresin and low molecular polyethylene wax.
S2, fully stirring and mixing the refined rice hull powder, the corn starch, the polyvinyl alcohol, the tackifying resin and the heat stabilizer for reaction, and then carrying out high-temperature polymerization at 300 ℃ to obtain the hot melt adhesive raw material.
Wherein the heat stabilizer is one or more than two of calcium stearate and zinc stearate.
And S3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously heating the viscous matrix.
Wherein, in the process of carrying out high-temperature contact gasification operation on the hot melt adhesive raw material and synchronously heating the viscous matrix, the hot melt raw material after the high-temperature contact gasification operation is partially contacted and mixed with the viscous matrix.
And S4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on the matrix layer, and cooling and forming to obtain the hot-melt adhesive film.
The cooling and forming in the step S4 specifically includes: the polymer bottom was cooled using a cooling device waiting to drop to the crystallization temperature and the cooling was stopped.
In conclusion, the adhesive effect of the adhesive matrix can be enhanced by adding the initiator into the raw materials; the anti-aging agent is added into the raw materials, so that the service life of the viscous matrix can be obviously prolonged, and the antioxidant can be added into the viscous matrix to improve the oxidation resistance of the viscous matrix. The rice husk is used as the low-cost filler, so that the hot melt adhesive prepared by the method is favorable for combining the hot melt adhesive raw material with the viscous matrix and does not influence the later recovery. The invention firstly carries out separate reaction on the raw materials for providing the viscosity of the hot melt adhesive film and the glue-forming raw materials, then carries out partial high-temperature polymerization reaction after the contact type gasification reaction, and carries out injection extrusion in a way that the viscous matrix coats the hot melt raw materials, so that the viscous matrix is more positioned on the surface of the hot melt adhesive film, the viscosity effect of the hot melt adhesive film is improved, and the range of the adhered objects of the hot melt adhesive film is enlarged.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A preparation process of a hot melt adhesive film adhered with a PP material is characterized in that,
the method comprises the following steps:
s1, mixing melamine resin, mineralized nano powder, an initiator, an anti-aging agent, a viscosity regulator and an antioxidant at high temperature, and continuously stirring and adding a sodium hydroxide solution in the process of gradually cooling to obtain a viscous matrix;
s2, fully stirring and mixing the refined rice hull powder, corn starch, polyvinyl alcohol, tackifying resin and heat stabilizer for reaction, and then carrying out high-temperature polymerization at 100-300 ℃ to obtain a hot melt adhesive raw material;
s3, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously heating the viscous matrix;
and S4, synchronously extruding the viscous matrix and the hot-melt raw material in a mode that the viscous matrix covers the hot-melt raw material, pressing the viscous matrix and the hot-melt raw material on the matrix layer, and cooling and forming to obtain the hot-melt adhesive film.
2. The process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the melamine resin is formed by mixing melamine and formaldehyde.
3. The process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the initiator consists of dicumyl peroxide, pyrogallol and ethyl cellulose;
the mixing mass ratio is 9: 2: 2.
4. the process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the anti-aging agent consists of ditertiary butyl paracresol and isopropyl titanate;
the mixing mass ratio is 6: 1.
5. the process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the antioxidant consists of phosphite ester, trimethylolpropane trimethacrylate and amino trimethylene phosphonic acid tetrasodium;
the mixing mass ratio is 7: 2: 1.
6. the process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the mineralized nano powder consists of hydrotalcite, titanium dioxide and calamine;
the mixing mass ratio is 2: 1: 1.
7. the process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
in the process of carrying out high-temperature contact gasification operation on the hot melt adhesive raw material and synchronously heating the viscous matrix, part of the hot melt raw material after the high-temperature contact gasification operation is in contact with and mixed with part of the viscous matrix.
8. The process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the cooling and forming in step S4 specifically includes: the polymer bottom was cooled using a cooling device waiting to drop to the crystallization temperature and the cooling was stopped.
9. The process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the heat stabilizer is one or more than two of calcium stearate and zinc stearate.
10. The process for preparing a hot-melt adhesive film for bonding PP materials according to claim 1,
the viscosity regulator is one or a mixture of several of paraffin, synthetic wax of sand rope, microcrystalline wax, ceresin and low molecular polyethylene wax.
CN202111594851.XA 2021-12-24 2021-12-24 Preparation process of hot melt adhesive film for adhering PP (polypropylene) material Pending CN114196332A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101276294B1 (en) * 2012-01-20 2013-06-24 대상 주식회사 Starch based hot melt adhesiven with improved compatibility and adhesion strength
CN110105633A (en) * 2019-04-01 2019-08-09 江苏国立化工科技有限公司 A kind of high etherification modified high performance adhesive and its preparation process
CN111019601A (en) * 2019-12-26 2020-04-17 成都新柯力化工科技有限公司 Low-cost biodegradable hot melt adhesive special for paper packaging and preparation method thereof
CN112210312A (en) * 2020-09-19 2021-01-12 江苏惠沣环保科技有限公司 Preparation process and device of hot melt adhesive film for adhering PP (polypropylene) material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101276294B1 (en) * 2012-01-20 2013-06-24 대상 주식회사 Starch based hot melt adhesiven with improved compatibility and adhesion strength
CN110105633A (en) * 2019-04-01 2019-08-09 江苏国立化工科技有限公司 A kind of high etherification modified high performance adhesive and its preparation process
CN111019601A (en) * 2019-12-26 2020-04-17 成都新柯力化工科技有限公司 Low-cost biodegradable hot melt adhesive special for paper packaging and preparation method thereof
CN112210312A (en) * 2020-09-19 2021-01-12 江苏惠沣环保科技有限公司 Preparation process and device of hot melt adhesive film for adhering PP (polypropylene) material

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Application publication date: 20220318