CN115011282A - Preparation method of packaging adhesive film - Google Patents

Preparation method of packaging adhesive film Download PDF

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Publication number
CN115011282A
CN115011282A CN202210556578.XA CN202210556578A CN115011282A CN 115011282 A CN115011282 A CN 115011282A CN 202210556578 A CN202210556578 A CN 202210556578A CN 115011282 A CN115011282 A CN 115011282A
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CN
China
Prior art keywords
adhesive film
packaging adhesive
foaming
tert
bis
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
CN202210556578.XA
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Chinese (zh)
Inventor
温兴翰
魏梦娟
郑炯洲
侯宏兵
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Hangzhou First Applied Material Co Ltd
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Hangzhou First Applied Material Co Ltd
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Priority to CN202210556578.XA priority Critical patent/CN115011282A/en
Publication of CN115011282A publication Critical patent/CN115011282A/en
Pending legal-status Critical Current

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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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0853—Vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/104—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof
    • C08J9/105—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/107—Nitroso compounds
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C09J129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5816—Measuring, controlling or regulating temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2329/00—Characterised by the use of 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; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • 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
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    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
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    • 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
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/204—Applications use in electrical or conductive gadgets use in solar cells
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
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    • 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
    • C09J2423/00—Presence of polyolefin
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    • C09J2429/00—Presence of polyvinyl alcohol
    • 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
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  • Polymers & Plastics (AREA)
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Abstract

The invention relates to a preparation method of a packaging adhesive film, and belongs to the technical field of photovoltaic module packaging adhesive films. The invention foams resin, filler and auxiliary agent by physical or chemical method to obtain foaming particles, and then the foaming particles are molded to obtain the packaging adhesive film. The invention combines compression molding on the basis of extrusion molding, and combines two processes to prepare the adhesive film with high foaming rate and uniform foam pores, thereby solving the problem that the battery piece is easy to crack during packaging. Compared with the adhesive film in the prior art, the adhesive film obtained by the invention has remarkable advantages in foaming ratio and foam hole uniformity.

Description

Preparation method of packaging adhesive film
Technical Field
The invention relates to a preparation method of a packaging adhesive film, and belongs to the technical field of photovoltaic module packaging adhesive films.
Background
In the packaging process of the existing photovoltaic module, the high hardness of the white adhesive film can cause the hidden crack risk of the cell, thereby greatly reducing the generating efficiency and the service life of the photovoltaic module. The data show that the foaming packaging adhesive film can improve the risk, but the traditional white foaming adhesive film has low foaming rate, uneven foaming, large pore diameter, unobvious hardness improvement and poor anti-crack effect. And the traditional preparation technology has the defects of high energy consumption, complicated steps and the like.
Patent document No. CN103895146B discloses a continuous forming device and method for polymer microcellular foamed products. The method comprises the steps of forming a foamable polymer melt by melting and mixing polymer resin, a chemical foaming agent and an additive through an extruder, or adding the polymer resin and the additive into the extruder, injecting a certain amount of a physical foaming agent into the polymer melt at the middle section of the extruder, and uniformly mixing the polymer melt and the physical foaming agent through the mixing action of a screw to form the foamable polymer melt; and finally, injecting the foamable polymer melt into a foaming mold, foaming the melt and filling the mold to obtain the product.
As mentioned above, the adhesive film has the disadvantages of low foaming rate, uneven foaming, large pore diameter of the cells, unobvious hardness improvement and poor anti-subfissure effect, and the preparation process has high energy consumption and complex steps.
Disclosure of Invention
The present invention is directed to solving the above technical problems, and therefore, a method for preparing a packaging adhesive film is provided. The method of the invention can be used for manufacturing the adhesive film with high foaming rate, small and uniform foam holes.
The technical scheme for solving the problems is as follows:
a preparation method of a packaging adhesive film comprises the steps of foaming resin, a filler and an auxiliary agent by a physical method or a chemical method to prepare foaming particles, and then carrying out mould pressing on the foaming particles to prepare the packaging adhesive film.
In the technical scheme, the direct product formed by extrusion molding is the foaming particles, while the direct product formed by extrusion molding in the prior art is the packaging adhesive film; based on the difference of direct purposes of foaming extrusion, the invention has great advantages in extrusion efficiency and energy consumption, and can also obtain intermediate-state foaming particles with high foaming multiplying power and high uniform foam holes. Then, the invention carries out compression molding on the foaming particles, and the adhesive film prepared by the method has remarkable advantages in foaming multiplying power and foam cell uniformity compared with the adhesive film in the prior art. Therefore, compared with the prior art, the invention has lower energy consumption in process; in terms of product quality, the packaging adhesive film has high foaming multiplying power and uniform foam holes, and solves the problem that the battery piece is easy to crack during packaging. As the optimization of the technical scheme, the matrix resin and the filler are granulated to obtain first master batches; uniformly mixing the first master batch and the auxiliary agent, and then carrying out secondary granulation to obtain a second master batch; then adding the second master batch into a foaming kettle for physical foaming to obtain the foaming particles; the matrix resin is at least one of EVA, POE and PVB resin.
As another preferred mode of the above technical solution, the matrix resin and the filler are granulated to obtain a first master batch, and the first master batch, the functional assistant and the chemical foaming agent are uniformly mixed and then chemically foamed in a secondary granulation process to obtain the foamed particles; the matrix resin is at least one of EVA, POE and PVB resin.
Preferably, the mold pressing temperature is 50-100 ℃, and the mold pressing pressure is 0.1-3 MPa.
As a further optimization of the technical scheme, the molding time is 1-10 min.
Preferably, the granulation temperature is 90 to 200 ℃.
Preferably, in the step of molding, the foamed particles are spread in a flat mold, and the mold is closed, heated, pressurized, molded, cooled, and opened to obtain the packaging adhesive film.
Preferably, the temperature of the foaming kettle is 50-120 ℃, and the foaming pressure is 1-9 MPa.
Preferably, the chemical foaming agent is one or more selected from 4,4' -oxybis-benzenesulfonylhydrazide, azodicarbonamide, ammonium bicarbonate, sodium bicarbonate and potassium bicarbonate.
Preferably, the filler is one or more selected from titanium dioxide, barium sulfate, bentonite, white carbon black, wollastonite, silicon whisker, talcum powder, magnesium hydroxide, magnesium oxide, aluminum hydroxide and aluminum oxide.
Preferably, the functional auxiliary agent comprises a cross-linking agent, an auxiliary cross-linking agent, a heat stabilizer, a light stabilizer and an ultraviolet absorbent;
the cross-linking agent is selected from isopropyl tert-butylperoxycarbonate, 2, 5-dimethyl 2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane, 2-ethylhexyl tert-butylperoxycarbonate, 2, 5-dimethyl 2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane, one or more of 1, 1-bis (t-amylperoxy) -3,3, 5-trimethylcyclohexane, 1-bis (t-amylperoxy) cyclohexane, 2-bis (t-butylperoxy) butane, t-amyl peroxycarbonate, t-butyl peroxy3, 3, 5-trimethylhexanoate;
the auxiliary cross-linking agent is selected from pentaerythritol triacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, ethoxylated glycerol triacrylate, propoxylated glycerol triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane trimethacrylate, triethylene glycol dimethacrylate, diethylene glycol dimethacrylate, ethylene glycol dimethacrylate, polyethylene glycol (200) diacrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) diacrylate, polyethylene glycol (200) dimethacrylate, polyethylene glycol (400) dimethacrylate, polyethylene glycol (600) diacrylate, polyethylene glycol (200) acrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) acrylate, polyethylene glycol (200) acrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) dimethacrylate, and mixtures thereof, One or more of ethoxylated bisphenol A diacrylate, ethoxylated bisphenol A dimethacrylate, 1, 3-butanediol diacrylate, 1, 4-butanediol diacrylate and neopentyl glycol diacrylate;
the heat stabilizer is selected from one or more of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, diethylene glycol bis [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) s-triazine-2, 4,6- (1H,3H,5H) trione, 1,3, 5-trimethyl-2, 4,6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene and tris (2, 4-di-tert-butylphenyl) phosphite;
the ultraviolet absorbent is selected from one or more of 2-hydroxy-4-n-octoxybenzophenone, 2, 4-dihydroxy benzophenone, 2-hydroxy-4-methoxybenzophenone, 2- (2' -hydroxy-5 ' -methylphenyl) benzotriazole, 2- (2' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole and 2- (2' -hydroxy-5 ' -tert-octylphenyl) benzotriazole.
Preferably, after the molding, the method further comprises the following pre-crosslinking step: pre-crosslinking the white foaming adhesive film to obtain a pre-crosslinked packaging adhesive film; the pre-crosslinking is selected from at least one of thermal crosslinking, ultraviolet crosslinking and irradiation crosslinking.
In conclusion, the invention has the following beneficial effects:
1. performing conventional operation of extrusion molding of physical/chemical foaming into a glue film; the method combines compression molding on the basis of extrusion molding, and combines two processes to prepare the adhesive film with high foaming rate and uniform foam pores, so that the problem that the battery piece is easy to crack during packaging is solved;
2. the compression molding has lower energy consumption than the extrusion molding, so that the invention has more advantages in comprehensive energy consumption compared with the prior art;
3. the invention adopts a process of combining extrusion molding and compression molding; compared with the prior art, the direct product in extrusion molding is the foaming particles, and the intermediate foaming particles have remarkable advantages in product molding compared with the adhesive film of the final product, namely the intermediate foaming particles with high foaming multiplying power and uniform high foam holes can be generated, and then the foaming particles are subjected to compression molding to prepare the packaging adhesive film with high foaming multiplying power and uniform high foam holes, and the foam hole retention rate is excellent; compared with the adhesive film in the prior art, the adhesive film obtained by the invention has remarkable advantages in foaming ratio and foam uniformity.
Detailed Description
This detailed description is to be construed as illustrative only and is not limiting, since various modifications will become apparent to those skilled in the art after reading the present specification and the appended claims, all falling within the scope of the appended claims.
Examples one to nine
A preparation method of a packaging adhesive film comprises the following steps:
a. granulating the matrix resin and the filler to obtain a first master batch;
b. uniformly mixing the first master batch and the auxiliary agent, and then carrying out secondary granulation to obtain a second master batch; then adding the second master batch into a foaming kettle for physical foaming to obtain foaming particles; or after uniformly mixing the first master batch, the functional auxiliary agent and the chemical foaming agent, carrying out chemical foaming in a secondary granulation process to obtain foaming particles;
c. spreading the foamed particles in a flat plate mold, closing the mold, raising the temperature, pressurizing, molding, cooling and opening the mold to obtain the white foamed adhesive film;
d. and pre-crosslinking the white foaming adhesive film to obtain a packaging adhesive film.
Comparative example 1
A preparation method of a packaging adhesive film comprises the following steps:
uniformly mixing matrix resin, a filler and an auxiliary agent, adding the mixture into an extruder, injecting a certain amount of physical foaming agent into the polymer melt at the middle section of the extruder, and uniformly mixing the polymer melt and the physical foaming agent through the mixing action of a screw rod to form a foamable polymer melt; finally, the foamable polymer melt is extruded by tape casting to prepare the packaging adhesive film.
Comparative example No. two
A preparation method of a packaging adhesive film comprises the following steps:
uniformly mixing matrix resin, a filler, an auxiliary agent and a foaming agent, adding the mixture into an extruder, and uniformly mixing a polymer melt and a chemical foaming agent under the screw mixing action to form a foamable polymer melt; finally, the foamable polymer melt is extruded by tape casting to prepare the packaging adhesive film.
Specific parameters for each example and comparative example are shown in the following table:
Figure BDA0003655151210000041
Figure BDA0003655151210000051
note 1: the specific parameters in the above table are as follows:
matrix resin A
A1：EVA
A2：POE
A3：PVB
Filler B
B1: titanium white powder
B2: zinc oxide
B3: barium sulfate
Blowing agent C
C1: 4,4' -oxybis-benzenesulfonyl hydrazide
C2: azodicarbonamide
C3: n, N' -dinitrosopentamethylenetetramine
Crosslinking agent D
D1: tert-butyl peroxyisopropyl carbonate
D2: 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane
D3: 2, 2-bis (tert-butylperoxy) butane
Auxiliary crosslinking agent E
E1: trimethylolpropane triacrylate
E2: trimethylolpropane tri (acrylate)
E3: ethoxylated bisphenol A diacrylate
Heat stabilizer F
F1: tris (2, 4-di-tert-butylphenyl) phosphite
F2: 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) s-triazine-2, 4,6- (1H,3H,5H) trione F3: 1,3, 5-trimethyl-2, 4,6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene
Ultraviolet absorber G
G1: 2-hydroxy-4-n-octoxy benzophenone
G2: 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole
G3: 2- (2' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole
Precrosslinking H
H1: irradiation crosslinking, beam current 14mA, 10m/min
H2: UV crosslinking, 10mJ/cm 2 Treating for 5min
H3: thermal crosslinking at 110 ℃ and 30m/min
Note 2: the unspecified units in the above tables all refer to mass ratios;
note 3: in the above table, when the foaming agent is filled, it indicates that the chemical foaming is performed by using the corresponding foaming agent; when the foaming agent is "-" it means that foaming is not performed with the foaming agent, that is, physical foaming is employed.
The following are test methods and data.
Expansion ratio: the ratio of the density of the sample after foaming to the density of the sample before foaming, and the density of the sample is tested by a drainage method.
Cell diameter: the average diameter of at least 100 cells in the SEM image was counted.
Cell density:
Figure BDA0003655151210000071
n is the number of the foam holes in the SEM image; m is the magnification; a is the area of the selected SEM region.
Figure BDA0003655151210000072

Claims (10)

1. A preparation method of a packaging adhesive film is characterized in that matrix resin, a filler, a physical foaming agent or a chemical foaming agent and an auxiliary agent are foamed through a physical method or a chemical method to prepare foamed particles, and then the foamed particles are subjected to compression molding to obtain the packaging adhesive film.
2. The method for preparing the packaging adhesive film according to claim 1, wherein the matrix resin and the filler are granulated to obtain a first masterbatch; uniformly mixing the first master batch and the auxiliary agent, and then carrying out secondary granulation to obtain a second master batch; and then adding the second master batch and the physical foaming agent into a foaming kettle for physical foaming to obtain the foaming particles.
3. The method for preparing the packaging adhesive film according to claim 1, wherein the matrix resin and the filler are granulated to obtain a first masterbatch, the first masterbatch is uniformly mixed with the auxiliary agent and the chemical foaming agent, and then the mixture is chemically foamed in a secondary granulation process to obtain the foamed particles.
4. The method for preparing the packaging adhesive film according to claim 1, wherein: in the mould pressing preparation process, the mould pressing temperature is 50-100 ℃, and the mould pressing pressure is 0.1-3 MPa.
5. The method for preparing a packaging adhesive film according to any one of claims 1 to 3, wherein: the molding step specifically comprises the steps of flatly paving the foaming particles in a flat plate mold, closing the mold, heating, pressurizing, molding, cooling and opening the mold to obtain the packaging adhesive film.
6. The method for preparing the packaging adhesive film according to claim 2, wherein: the temperature of the foaming kettle is 50-120 ℃, and the foaming pressure is 1-9 MPa.
7. The method for preparing the packaging adhesive film according to claim 3, wherein: the chemical foaming agent is selected from one or more of 4,4' -oxo-bis-benzenesulfonyl hydrazide, azodicarbonamide, ammonium bicarbonate, sodium bicarbonate and potassium bicarbonate.
8. The method for preparing the packaging adhesive film according to claim 1, wherein: the filler is selected from one or more of titanium dioxide, barium sulfate, bentonite, white carbon black, wollastonite, whisker silicon, talcum powder, magnesium hydroxide, magnesium oxide, aluminum hydroxide and aluminum oxide.
9. The method for preparing the packaging adhesive film according to claim 1, wherein: the auxiliary agent comprises a cross-linking agent, an auxiliary cross-linking agent, a heat stabilizer, a light stabilizer and an ultraviolet absorbent;
the cross-linking agent is selected from isopropyl tert-butylperoxycarbonate, 2, 5-dimethyl 2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane, 2-ethylhexyl tert-butylperoxycarbonate, 2, 5-dimethyl 2, 5-bis (tert-butylperoxy) hexane, 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane, one or more of 1, 1-bis (t-amylperoxy) -3,3, 5-trimethylcyclohexane, 1-bis (t-amylperoxy) cyclohexane, 2-bis (t-butylperoxy) butane, t-amyl peroxycarbonate, t-butyl peroxy3, 3, 5-trimethylhexanoate;
the auxiliary cross-linking agent is selected from pentaerythritol triacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, ethoxylated glycerol triacrylate, propoxylated glycerol triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane trimethacrylate, triethylene glycol dimethacrylate, diethylene glycol dimethacrylate, ethylene glycol dimethacrylate, polyethylene glycol (200) diacrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) diacrylate, polyethylene glycol (200) dimethacrylate, polyethylene glycol (400) dimethacrylate, polyethylene glycol (600) dimethacrylate, polyethylene glycol (400) dimethacrylate, polyethylene glycol (600) dimethacrylate, poly (ethylene glycol) acrylate, poly (ethylene glycol) acrylate, poly (ethylene glycol) acrylate, and the poly (ethylene glycol) acrylate, and the copolymer, One or more of ethoxylated bisphenol A diacrylate, ethoxylated bisphenol A dimethacrylate, 1, 3-butanediol diacrylate, 1, 4-butanediol diacrylate and neopentyl glycol diacrylate;
the heat stabilizer is selected from one or more of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, diethylene glycol bis [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) s-triazine-2, 4,6- (1H,3H,5H) trione, 1,3, 5-trimethyl-2, 4,6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene and tris (2, 4-di-tert-butylphenyl) phosphite;
the ultraviolet absorbent is selected from one or more of 2-hydroxy-4-n-octoxybenzophenone, 2, 4-dihydroxy benzophenone, 2-hydroxy-4-methoxybenzophenone, 2- (2' -hydroxy-5 ' -methylphenyl) benzotriazole, 2- (2' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole and 2- (2' -hydroxy-5 ' -tert-octylphenyl) benzotriazole.
10. The method for preparing the packaging adhesive film according to any one of claims 1 to 4, wherein: after the molding, the method also comprises a pre-crosslinking step: pre-crosslinking the packaging adhesive film to obtain a pre-crosslinked packaging adhesive film; the pre-crosslinking is selected from at least one of thermal crosslinking, ultraviolet crosslinking and irradiation crosslinking.
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