CN108481774B - PVC plastic-wood composite floor composite process - Google Patents
PVC plastic-wood composite floor composite process Download PDFInfo
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- CN108481774B CN108481774B CN201810289977.8A CN201810289977A CN108481774B CN 108481774 B CN108481774 B CN 108481774B CN 201810289977 A CN201810289977 A CN 201810289977A CN 108481774 B CN108481774 B CN 108481774B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0057—Producing floor coverings
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- 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
- C08F218/00—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 acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
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- 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
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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
- C09J131/00—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 acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
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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
- 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
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- 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
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- Polymers & Plastics (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention discloses a PVC plastic wood composite floor composite process, which relates to the technical field of PVC plastic wood composite floor production and comprises the following steps: preparing PVC wood grain film adhesive: (1) preparing materials; (2) pre-emulsification; (3) pre-polymerization; (4) copolymerization; (5) mixing; secondly, performing surface treatment on the PVC plastic-wood floor; thirdly, scraping glue and pressing; (IV) curing at room temperature; and (V) heating and curing. The method has simple process steps and strong operability, carries out compressed air blowing and ethanol soaking on the PVC plastic-wood floor, is assisted with ultrasonic treatment so as to thoroughly remove pollutants on the surface of the PVC plastic-wood floor, and simultaneously carries out multi-stage curing, so that the bonding strength between the PVC wood grain film and the PVC plastic-wood floor is high, the PVC wood grain film is not easy to peel off, and the surface of the product is smooth.
Description
Technical Field
The invention relates to the technical field of PVC plastic-wood composite floor production, in particular to a PVC plastic-wood composite floor composite process.
Background
The plastic-wood composite floor is a high-tech environment-friendly material which is prepared by uniformly mixing wood (wood cellulose and plant cellulose) as a base material, thermoplastic high polymer materials (PE and PVC plastics), processing aids and the like, and then heating and extruding the mixture by using die equipment, has the properties and characteristics of the wood and the plastics and can replace the wood.
The surface of one plastic-wood composite floor is compounded with a PVC film printed with wood grains, and during production, a layer of adhesive is required to be brushed on the surface of the plastic-wood composite floor, and then the PVC wood grain film is attached to the surface of the plastic-wood composite floor. However, the adhesive used in compounding is a commercially available two-component adhesive, and when the adhesive is used, the component A (main agent) and the component B (curing agent) need to be mixed, so that the use is very inconvenient. In addition, an acrylate adhesive is also used, the surface of the plastic-wood floor and the surface of the PVC wood grain film are smooth and nonporous, but the prior acrylate adhesive is generally low in initial adhesion and poor in bonding strength, so that the plastic-wood floor and the wood grain PVC film are very easy to peel off, and the PVC plastic-wood floor is directly compounded without cleaning the surface of the PVC plastic-wood floor during compounding at present, and the surface of the compounded PVC plastic-wood floor is uneven due to the fact that pollutants such as oil stain, floating ash and moisture exist on the surface of the PVC plastic-wood floor, so that the bonding strength between the PVC wood grain film and the PVC plastic-wood floor is low and the PVC wood.
Disclosure of Invention
The invention aims to solve the technical problems of the PVC plastic wood composite floor composite process in the prior art, and provides the PVC plastic wood composite floor composite process which has the advantages of simple process steps, strong operability, high bonding strength between the PVC wood grain film and the PVC plastic wood floor, difficult peeling and smooth product surface.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a PVC plastic-wood composite floor composite process, which comprises the following steps:
preparing PVC wood grain film adhesive
(1) The floor adhesive is prepared by weighing 55 ~ parts of deionized water, 4 355 parts of N-hydroxymethyl acrylamide, 30 ~ parts of butyl acrylate, 30 ~ parts of vinyl acetate, 4 ~ parts of a composite emulsifier, 0.2 ~.3 parts of a composite initiator and 10 7320 parts of an emulsified rosin tackifier, wherein butyl acrylate and vinyl acetate are mixed to obtain a mixed monomer, the emulsified rosin tackifier is prepared by firstly adding rosin into a flask, adding a proper amount of toluene and dibutyl phthalate, heating until the rosin is completely melted, then dissolving the emulsifier and the auxiliary emulsifier into a proper amount of deionized water, then adding the mixture into the melted rosin, simultaneously dripping deionized water into a stirring state at a temperature of 80 ~ ℃ and stirring, continuously stirring for 20 5min after the dripping of the deionized water is finished, cooling to room temperature to obtain the emulsified rosin tackifier, the emulsified rosin tackifier is obtained by designing a formula, and obtaining a good-stable and strong-viscous wood grain-adhesive film adhesive, the adhesive has good stability and strong adhesive strength, and is suitable for glass adhesive bonding, even though the adhesive strength of the adhesive film is improved by adding a high-viscosity of a high-viscosity-is higher when the adhesive-viscosity-is higher than that the viscosity-of a proper amount of a high-viscosity-polyvinyl chloride resin added PVC resin added under normal-polyvinyl chloride is added to a high-polyvinyl chloride resin, which is added to be added into a proper amount of a high-polyvinyl chloride-viscosity-polyvinyl chloride resin, which is added in a proper amount of a high-polyvinyl chloride, which is added-polyvinyl chloride, a proper amount of a high-polyvinyl chloride resin, and a proper amount of a high-polyvinyl chloride, which is added-polyvinyl chloride, and a high-polyvinyl chloride, and a proper amount of a high-polyvinyl chloride, which is added-polyvinyl chloride, and a proper amount of a high-polyvinyl chloride, which is added to a proper amount of a high-polyvinyl chloride, a high-polyvinyl acetate adhesive film, which is added to be added-polyvinyl acetate adhesive, which is added to be added-polyvinyl chloride, and a proper amount of a high-polyvinyl chloride, and a high-polyvinyl acetate adhesive, and a high-polyvinyl chloride, and a high-low.
(2) Pre-emulsification, namely adding deionized water into a flask, then adding N-hydroxymethyl acrylamide, a composite emulsifier and a mixed monomer accounting for 40 ~ 50% of the total mass of the mixed monomer, stirring and introducing nitrogen for 20 ~ 30min for full emulsification, fully and uniformly mixing basic reactants through pre-emulsification, and simultaneously introducing nitrogen for protection, so that polymerization is carried out in a nitrogen atmosphere, the phenomenon that the reaction is uncontrollable due to the influence of oxygen on the initiation efficiency is prevented, and more side reactions are prevented from being increased in the polymerization process.
(3) And (2) prepolymerization, namely adding the composite initiator accounting for 40 ~ 50% of the total mass of the composite initiator, heating to 50 ~ 60 ℃, and keeping the temperature constant.
(4) And (2) dissolving the residual composite initiator in deionized water to prepare a composite initiator solution with the mass concentration of 4%, dropwise adding the residual mixed monomer and the composite initiator solution into the flask at a constant speed, reacting for 4 ~ 5 hours under a stirring state, cooling to room temperature, dropwise adding the residual mixed monomer and the composite initiator solution into the flask at a constant speed, and facilitating the control of the reaction temperature so as to enable the reaction process to be stable and controllable.
(5) Mixing: adding the emulsified rosin tackifier, and uniformly stirring to obtain PVC wood grain film adhesive;
(II) PVC plastic wood floor surface treatment
The method comprises the steps of blowing the surface of the PVC plastic-wood floor by compressed air, soaking the PVC plastic-wood floor in ethanol for 30 ~ 60min, fishing up the PVC plastic-wood floor, and drying the PVC plastic-wood floor at the temperature of 50 ~ 60 ℃, wherein the compressed air blowing and ethanol soaking are carried out on the PVC plastic-wood floor, and the ultrasonic treatment is assisted to thoroughly remove pollutants on the surface of the PVC plastic-wood floor, so that the PVC wood grain film can be fully contacted with the PVC plastic-wood floor, and the bonding strength can be improved.
(III) frictioning and pressing
And (3) uniformly scraping and coating the PVC wood grain film adhesive on the adhesive surface of the PVC plastic-wood floor in the step (II) by using a sawtooth scraper, and pasting the PVC wood grain film on the adhesive surface of the PVC plastic-wood floor so that the PVC wood grain film is adhered to the PVC plastic-wood floor.
(IV) curing at room temperature
The PVC wood grain film and the PVC plastic wood floor are compressed by a press for 4 ~ 8h, and the PVC wood grain film and the PVC plastic wood floor are firstly compressed by the press and are primarily cured at room temperature, so that the PVC wood grain film, the PVC plastic wood floor and the PVC wood grain film bonding glue can be fully and uniformly contacted, and the surface is smooth.
(V) heating and curing
And (2) after pressure relief, placing the PVC plastic-wood floor at 50 ~ 55 ℃ for continuous immobilization for 4 ~ 8h, and finally placing at room temperature for at least 18h to complete compounding to obtain the PVC plastic-wood composite floor, wherein the curing efficiency and the bonding strength are improved at 50 ~ 55 ℃, the curing speed and the bonding strength of the PVC wood grain film bonding adhesive are affected by overhigh or overlow temperature, and finally, the PVC plastic-wood composite floor is placed at room temperature for at least 18h to achieve complete curing.
Preferably, in the step (1), the emulsifier is RH-1, the co-emulsifier is ZR-1, the adding amount of the emulsifier is 10 ~% of the mass of the rosin, the mass ratio of the emulsifier to the co-emulsifier is (4 ~): 1, the dropping speed of the deionized water is 30 ~ drops/min, the dropping time is 20 ~ 30min, and the stirring speed is 800 ~ r/min, the emulsifier RH-1 is a rosin-based emulsifier synthesized by using rosin as a raw material and has better compatibility with the rosin resin, so that the rosin resin can be well emulsified, meanwhile, as the adding amount of the emulsifier increases, the particle size of the emulsified rosin tackifier becomes smaller, the viscosity becomes larger, the consistency becomes better, the stability is improved, but the cost is improved as the content of the emulsifier is too high, and the initial viscosity and other properties of the emulsified rosin tackifier are influenced, while the adding of the co-emulsifier can further improve the stability of the rosin tackifier, but the content of the co-emulsifier becomes too high, the cost is also improved as the content of the rosin tackifier is too high, the comprehensive consideration, the selection of the emulsifier in the invention, the emulsifier, the RH-1 is an emulsifier, the co-emulsifier, the adding amount of the emulsifier is limited, the emulsifying tackifier, the adding speed of the rosin-emulsifier is too high, the dropping speed of the adding speed of the rosin, the adding speed of the emulsifying tackifier, the rosin phase, the adding speed of the emulsifying tackifier is too slow dropping speed of the rosin phase, so that the rosin phase becomes larger, the uniform dropping speed of the stirring speed of the uniform dropping speed of the rosin phase becomes larger, the stirring speed of the uniform stirring speed of the rosin phase becomes larger, so that the stirring speed of the emulsifying rosin phase becomes worse, the uniform stirring speed of the emulsifying rosin phase becomes 3535 min, so that the stirring speed of the stirring is changed, so that the stirring speed of the stirring is.
Preferably, in the step (1), the composite emulsifier is formed by mixing a nonionic emulsifier OP-10 (polyoxyethylene nonyl ether) and an anionic surfactant sodium dodecyl sulfate according to a mass ratio of 1 to (2 ~ 3), the emulsifier directly determines the particle size and stability of the PVC wood grain film adhesive, the emulsifier 0P-10 is favorable for improving the electrolyte resistance and chemical stability of the PVC wood grain film adhesive, the sodium dodecyl sulfate is favorable for improving the stability of the polymerization process, if only the anionic emulsifier is used, the PVC wood grain film adhesive has a layering phenomenon, the conversion rate is extremely low, if only the sodium dodecyl sulfate is used, the particle size of the PVC wood grain film adhesive is small, and the PVC wood grain film adhesive is sensitive to the electrolyte in the polymerization process, so the composite emulsifier is formed by mixing the nonionic emulsifier OP-10 and the anionic surfactant sodium dodecyl sulfate, the nonionic emulsifier and the anionic emulsifier in the composite emulsifier are alternately adsorbed, the stability of the PVC wood grain film adhesive can be improved, and when the nonionic emulsifier OP-10 (polyoxyethylene nonyl ether) and the anionic surfactant sodium dodecyl sulfate are mixed according to a mass ratio of 1 to (2 ~ 3), the adhesive performance of the PVC wood grain film adhesive is fine and the PVC wood grain adhesive is better than that when only the anionic emulsifier and the anionic emulsifier is used.
Preferably, in the step (1), the composite initiator is formed by mixing potassium persulfate and sodium metabisulfite according to the mass ratio of 1 (1 ~ 1.2), and the type of the initiator has great influence on the conversion rate of monomers, the polymerization reaction time and the stripping strength which is the adhesive property, so that the composite initiator is limited to be formed by mixing potassium persulfate and sodium metabisulfite according to the mass ratio of 1 (1 ~ 1.2), the reaction conversion rate is high, the obtained PVC wood grain film adhesive has less aggregates, good stability and high stripping strength.
Preferably, in the step (three), the glue application amount of the PVC wood grain film adhesive is 100 ~ 120g/m2Too large amount of glue application can cause glue overflow, and too small amount can affect the bonding strength, so the glue application amount of the PVC wood grain film bonding glue is controlled to be 100 ~ 120g/m2。
Preferably, in the step (IV), the pressure of the press is 1 ~ 3kg/cm2. Excessive pressure can cause glue overflow, and too small can not ensure that the PVC wood grain film, the PVC plastic wood floor and the PVC wood grain film bonding glue can be fully and uniformly contacted.
Therefore, the invention has the following beneficial effects:
(1) discloses a PVC wood grain film adhesive, optimizes the species and the composition of comonomers, and adds an emulsified rosin tackifier, thereby having good stability and strong adhesive force;
(2) the PVC plastic-wood composite floor composite process is simple in process steps and strong in operability, compressed air blowing and ethanol soaking are carried out on the PVC plastic-wood floor, ultrasonic treatment is assisted, pollutants on the surface of the PVC plastic-wood floor are thoroughly removed, and multi-stage curing is carried out simultaneously, so that the bonding strength between a PVC wood grain film and the PVC plastic-wood floor is high, the PVC plastic-wood composite floor is not easy to peel, and the surface of a product is smooth.
Detailed Description
The invention is further described below by means of specific embodiments.
Example 1
Preparing PVC wood grain film adhesive
(1) Preparing materials: weighing the following components in parts by weight: 550g of deionized water, 40g of N-hydroxymethyl acrylamide, 300g of butyl acrylate, 300g of vinyl acetate, 40g of composite emulsifier and anionic surfactant sodium dodecyl sulfate in a mass ratio of 1: 2) and 2g of composite initiator (prepared by mixing potassium persulfate and sodium metabisulfite in a mass ratio of 1: 1) and 100g of emulsified rosin tackifier, and mixing butyl acrylate and vinyl acetate to obtain a mixed monomer; the emulsified rosin tackifier is prepared by the following method: firstly, adding rosin into a flask, adding a proper amount of toluene and dibutyl phthalate, heating until the rosin is completely melted, dissolving an emulsifier and a co-emulsifier in a proper amount of deionized water, adding the dissolved rosin into the deionized water, dripping the deionized water at the temperature of 80 ℃ under a stirring state, continuing stirring for 20min after the dripping of the deionized water is finished, and cooling to room temperature to obtain the emulsified rosin tackifier, wherein the emulsifier is RH-1, the co-emulsifier is ZR-1, the adding amount of the emulsifier is 10% of the mass of the rosin, and the mass ratio of the emulsifier to the co-emulsifier is 4: 1, the dropping speed of deionized water is 30 drops/min, the dropping time is 20min, and the stirring speed is 800 r/min;
(2) pre-emulsification: adding deionized water into a flask, adding N-hydroxymethyl acrylamide, a composite emulsifier and a mixed monomer accounting for 40% of the total mass of the mixed monomer, and introducing nitrogen for 20min while stirring for full emulsification;
(3) pre-polymerization: adding a composite initiator accounting for 40% of the total mass of the composite initiator, heating to 50 ℃, and keeping the constant temperature;
(4) copolymerization: dissolving the rest composite initiator in deionized water to prepare a composite initiator solution with the mass concentration of 4%, dropwise adding the rest mixed monomer and the composite initiator solution into a flask at a constant speed, reacting for 4 hours under a stirring state, and cooling to room temperature;
(5) mixing: adding the emulsified rosin tackifier, and uniformly stirring to obtain milky white uniform viscous PVC wood grain film adhesive;
(II) PVC plastic wood floor surface treatment
Blowing the surface of the PVC plastic-wood floor by using compressed air, soaking the PVC plastic-wood floor in ethanol for ultrasonic treatment for 30min, fishing out and drying at the temperature of 50 ℃;
(III) frictioning and pressing
Uniformly scraping and coating the PVC wood grain film adhesive in the step (II) by using a sawtooth scraperAdhering PVC wood grain film on the adhesive surface of the PVC plastic-wood floor to ensure that the PVC wood grain film is adhered with the PVC plastic-wood floor, wherein the glue application amount of the PVC wood grain film adhesive is 100g/m2；
(IV) curing at room temperature
Pressing the PVC wood grain film and the PVC plastic-wood floor by a press with the pressure of 1kg/cm2(ii) a The compacting time is 4 h;
(V) heating and curing
And (3) after pressure relief, placing the PVC plastic-wood floor at 50 ℃ for continuous immobilization for 4h, and finally placing at room temperature for at least 18h to complete compounding to obtain the PVC plastic-wood composite floor.
Example 2
Preparing PVC wood grain film adhesive
(1) Preparing materials: weighing the following components in parts by weight: 580g of deionized water, 45g of N-hydroxymethyl acrylamide, 350g of butyl acrylate, 350g of vinyl acetate, 45g of composite emulsifier and anionic surfactant sodium dodecyl sulfate according to the mass ratio of 1: 2.5), 2.5g of composite initiator (prepared by mixing potassium persulfate and sodium metabisulfite according to the mass ratio of 1: 1.1) and 150g of emulsified rosin tackifier, and mixing butyl acrylate and vinyl acetate to obtain a mixed monomer; the emulsified rosin tackifier is prepared by the following method: firstly, adding rosin into a flask, adding a proper amount of toluene and dibutyl phthalate, heating until the rosin is completely melted, dissolving an emulsifier and a co-emulsifier in a proper amount of deionized water, adding the dissolved rosin into the deionized water, dripping the deionized water at the temperature of 82 ℃ under a stirring state, continuing stirring for 25min after the dripping of the deionized water is finished, and cooling to room temperature to obtain the emulsified rosin tackifier, wherein the emulsifier is RH-1, the co-emulsifier is ZR-1, the adding amount of the emulsifier is 11% of the mass of the rosin, and the mass ratio of the emulsifier to the co-emulsifier is 4.5: 1, the dropping speed of deionized water is 35 drops/min, the dropping time is 25min, and the stirring speed is 850 r/min;
(2) pre-emulsification: adding deionized water into a flask, adding N-hydroxymethyl acrylamide, a composite emulsifier and a mixed monomer accounting for 45% of the total mass of the mixed monomer, and introducing nitrogen for 25min while stirring for full emulsification;
(3) pre-polymerization: adding a composite initiator accounting for 45% of the total mass of the composite initiator, heating to 55 ℃, and keeping the constant temperature;
(4) copolymerization: dissolving the rest composite initiator in deionized water to prepare a composite initiator solution with the mass concentration of 4%, dropwise adding the rest mixed monomer and the composite initiator solution into a flask at a constant speed, reacting for 4.5h under a stirring state, and cooling to room temperature;
(5) mixing: adding the emulsified rosin tackifier, and uniformly stirring to obtain milky white uniform viscous PVC wood grain film adhesive;
(II) PVC plastic wood floor surface treatment
Blowing the surface of the PVC plastic-wood floor by using compressed air, soaking the PVC plastic-wood floor in ethanol for ultrasonic treatment for 45min, fishing out and drying at the temperature of 55 ℃;
(III) frictioning and pressing
Uniformly scraping and coating the PVC wood grain film adhesive on the bonding surface of the PVC plastic-wood floor in the step (II) by using a sawtooth scraper, and pasting the PVC wood grain film on the bonding surface of the PVC plastic-wood floor so that the PVC wood grain film is bonded with the PVC plastic-wood floor, wherein the adhesive application amount of the PVC wood grain film adhesive is 110g/m2；
(IV) curing at room temperature
Pressing the PVC wood grain film and the PVC plastic-wood floor by a press with the pressure of 2kg/cm2(ii) a The compacting time is 5 h;
(V) heating and curing
And (3) after pressure relief, placing the PVC plastic-wood floor at 52 ℃ for continuous immobilization for 5h, and finally placing at room temperature for at least 18h to complete compounding to obtain the PVC plastic-wood composite floor.
Example 3
Preparing PVC wood grain film adhesive
(1) Preparing materials: weighing the following components in parts by weight: 600g of deionized water, 50g of N-hydroxymethyl acrylamide, 400g of butyl acrylate, 400g of vinyl acetate, 50g of composite emulsifier and anionic surfactant sodium dodecyl sulfate in a mass ratio of 1: 3) and 3g of a composite initiator (prepared by mixing potassium persulfate and sodium metabisulfite in a mass ratio of 1: 1.2) and 200g of emulsified rosin tackifier, and mixing butyl acrylate and vinyl acetate to obtain a mixed monomer; the emulsified rosin tackifier is prepared by the following method: firstly, adding rosin into a flask, adding a proper amount of toluene and dibutyl phthalate, heating until the rosin is completely melted, dissolving an emulsifier and a co-emulsifier in a proper amount of deionized water, adding the dissolved rosin into the deionized water, dripping the deionized water at the temperature of 85 ℃ under a stirring state, continuing stirring for 30min after the dripping of the deionized water is finished, and cooling to room temperature to obtain the emulsified rosin tackifier, wherein the emulsifier is RH-1, the co-emulsifier is ZR-1, the adding amount of the emulsifier is 12% of the mass of the rosin, and the mass ratio of the emulsifier to the co-emulsifier is 5: 1, the dropping speed of deionized water is 40 drops/min, the dropping time is 30min, and the stirring speed is 900 r/min;
(2) pre-emulsification: adding deionized water into a flask, adding N-hydroxymethyl acrylamide, a composite emulsifier and a mixed monomer accounting for 50% of the total mass of the mixed monomer, and introducing nitrogen for 30min while stirring for full emulsification;
(3) pre-polymerization: adding a composite initiator accounting for 50% of the total mass of the composite initiator, heating to 60 ℃, and keeping the constant temperature;
(4) copolymerization: dissolving the rest composite initiator in deionized water to prepare a composite initiator solution with the mass concentration of 4%, dropwise adding the rest mixed monomer and the composite initiator solution into a flask at a constant speed, reacting for 5 hours under a stirring state, and cooling to room temperature;
(5) mixing: adding the emulsified rosin tackifier, and uniformly stirring to obtain milky white uniform viscous PVC wood grain film adhesive;
(II) PVC plastic wood floor surface treatment
Blowing the surface of the PVC plastic-wood floor by using compressed air, soaking the PVC plastic-wood floor in ethanol for ultrasonic treatment for 60min, fishing out and drying at the temperature of 60 ℃;
(III) frictioning and pressing
Uniformly scraping and coating the PVC wood grain film adhesive on the PVC plastic in the step (II) by using a sawtooth scraperAdhering PVC wood grain film to the adhesive surface of the PVC plastic-wood floor to make the PVC wood grain film and the PVC plastic-wood floor adhered together, wherein the glue application amount of the PVC wood grain film adhesive is 120g/m2；
(IV) curing at room temperature
Pressing the PVC wood grain film and the PVC plastic-wood floor by a press with the pressure of 3kg/cm2(ii) a The compacting time is 8 h;
(V) heating and curing
And (3) after pressure relief, placing the PVC plastic-wood floor at 55 ℃ for continuous immobilization for 8h, and finally placing at room temperature for at least 18h to complete compounding to obtain the PVC plastic-wood composite floor.
Taking the PVC wood grain film adhesive obtained in the step (I) of each example without adding the emulsified rosin tackifier as a corresponding comparative example, respectively measuring the viscosity (25 ℃), the ionic stability and the peel strength of the PVC wood grain film adhesive obtained in the step (I) of each example and the PVC wood grain film adhesive in the comparative example, wherein the ionic stability measuring method comprises the following steps: placing a certain amount of PVC wood grain film adhesive in a test tube, and adding 3 times of 5% CaCl2Fully oscillating the solution to enable the solution to be fully mixed, and observing whether the solution is layered after standing for 48 hours, wherein the longer the layering time is, the more stable the solution is; the peel strength test method comprises the following steps: a certain amount of PVC wood grain film adhesive is coated on a glass sheet and is naturally dried to form a film, the thickness of the film is required to be uniform, and the peel strength is measured according to the GB/T2790-1995 method. The viscosity, ionic stability and peel strength results obtained are shown in table 1.
Table 1 results of viscosity, ionic stability and peel strength measurements of examples and comparative examples
As can be seen from Table 1, the viscosities of the PVC wood grain film adhesive obtained in the examples are all greater than those of the corresponding comparative examples, which shows that the addition of the emulsified rosin tackifier can increase the viscosity of the PVC wood grain film adhesive, thereby increasing the affinity of the PVC wood grain film adhesive to the surface of the PVC plastic-wood composite floor and improving the initial adhesive strength.
As can be seen from Table 1, the delamination times of the PVC wood grain film adhesive obtained in the examples are greater than those of the corresponding comparative examples, which shows that the PVC wood grain film adhesive of the present invention has better ionic stability.
As can be seen from Table 1, the peel strength of the adhesive of the PVC wood grain film obtained in each example is greater than that of the corresponding comparative example, which shows that the addition of the emulsified rosin tackifier can improve the initial adhesive strength and thus the peel strength.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (6)
1. The PVC plastic-wood composite floor composite process is characterized by comprising the following steps:
preparing PVC wood grain film adhesive
(1) Weighing 55 ~ 60 parts of deionized water, 4 ~ 5 parts of N-hydroxymethyl acrylamide, 30 ~ 40 parts of butyl acrylate, 30 ~ 40 parts of vinyl acetate, 4 ~ 5 parts of compound emulsifier, 0.2 ~ 0.3.3 parts of compound initiator and 10 ~ 20 parts of emulsified rosin tackifier according to the following weight part ratio, mixing butyl acrylate and vinyl acetate to obtain a mixed monomer, wherein the emulsified rosin tackifier is prepared by the following steps of adding rosin into a flask, adding a proper amount of toluene and dibutyl phthalate, heating until the rosin is completely melted, dissolving the emulsifier and the coemulsifier into a proper amount of deionized water, adding into the melted rosin, dripping deionized water at the temperature of 80 ~ 85 ℃ under a stirring state, continuing stirring for 20 ~ 30min after the dripping of the deionized water is finished, and cooling to room temperature to obtain the emulsified rosin tackifier;
(2) pre-emulsifying, namely adding deionized water into a flask, adding N-hydroxymethyl acrylamide, a composite emulsifier and a mixed monomer accounting for 40 ~ 50% of the total mass of the mixed monomer, and introducing nitrogen for 20 ~ 30min while stirring for full emulsification;
(3) prepolymerization, namely adding a composite initiator accounting for 40 ~ 50 percent of the total mass of the composite initiator, heating to 50 ~ 60 ℃, and keeping the temperature constant;
(4) dissolving the rest composite initiator in deionized water to prepare a composite initiator solution with the mass concentration of 4%, dropwise adding the rest mixed monomer and the composite initiator solution into a flask at a constant speed, reacting for 4 ~ 5h under a stirring state, and cooling to room temperature;
(5) mixing: adding the emulsified rosin tackifier, and uniformly stirring to obtain PVC wood grain film adhesive;
(II) PVC plastic wood floor surface treatment
Blowing the surface of the PVC plastic-wood floor by using compressed air, soaking the PVC plastic-wood floor in ethanol for ultrasonic treatment for 30 ~ 60min, fishing out, and drying at the temperature of 50 ~ 60 ℃;
(III) frictioning and pressing
Uniformly scraping and coating the PVC wood grain film adhesive on the bonding surface of the PVC plastic-wood floor in the step (II) by using a sawtooth scraper, and pasting the PVC wood grain film on the bonding surface of the PVC plastic-wood floor so as to enable the PVC wood grain film to be bonded with the PVC plastic-wood floor;
(IV) curing at room temperature
Pressing the PVC wood grain film and the PVC plastic-wood floor by a press for 4 ~ 8 h;
(V) heating and curing
And (3) after pressure relief, placing the PVC plastic-wood floor at 50 ~ 55 ℃ for continuous immobilization for 4 ~ 8h, and finally placing at room temperature for at least 18h to complete compounding, thereby obtaining the PVC plastic-wood composite floor.
2. The composite process of PVC plastic-wood composite floor as claimed in claim 1, wherein in step (1), the amount of emulsifier added is 10 ~ 12% of the mass of rosin, the mass ratio of emulsifier to co-emulsifier is (4 ~ 5): 1, the dropping speed of deionized water is 30 ~ 40 drops/min, the dropping time is 20 ~ 30min, and the stirring speed is 800 ~ 900 r/min.
3. The composite process for PVC plastic-wood composite floor as claimed in claim 1 or 2, wherein in the step (1), the composite emulsifier is prepared by mixing a nonionic emulsifier OP-10 and an anionic surfactant sodium dodecyl sulfate in a mass ratio of 1 (2 ~ 3).
4. The composite process for PVC plastic-wood composite floor as claimed in claim 1, wherein in step (1), the composite initiator is prepared by mixing potassium persulfate and sodium metabisulfite according to the mass ratio of 1 (1 ~ 1.2).
5. The composite process for PVC plastic-wood composite floor as claimed in claim 1, wherein in the third step, the glue amount of the PVC wood grain film adhesive is 100 ~ 120g/m2。
6. The composite process of PVC plastic-wood composite floor as claimed in claim 1, wherein in the step (IV), the pressure of the press is 1 ~ 3kg/cm2。
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