阅读说明：本技术 一种带有负离子释放功能的浸渍纸及其制备方法 (Impregnated paper with negative ion release function and preparation method thereof ) 是由 李英 朱红 袁艺宁 于 2021-08-31 设计创作，主要内容包括：本发明涉及浸渍纸技术领域,具体涉及一种带有负离子释放功能的浸渍纸及其制备方法,制备方法包括如下步骤：(1)改性粉体的制备；(2)浸渍胶的制备；(3)浸渍。本发明制得的改性粉体混入浸渍胶并进行固化后,聚丙烯酸酯弹性体可以使负离子粉体不容易沉降,更容易接近浸渍胶层的表面,而聚丙烯酸酯弹性体作为隔离剂分隔了负离子粉体和三聚氰胺-甲醛树脂,因此负离子粉体的表面更容易形成空气通路,有利于与外界空气接触而释放负离子；此外,聚丙烯酸酯弹性体以及负离子粉体自身的物化特性也可以起到增强增韧浸渍层的作用。(The invention relates to the technical field of impregnated paper, in particular to impregnated paper with an anion release function and a preparation method thereof, wherein the preparation method comprises the following steps: (1) preparing modified powder; (2) preparing impregnating adhesive; (3) and (4) dipping. After the prepared modified powder is mixed with the impregnating adhesive and cured, the polyacrylate elastomer can ensure that the anion powder is not easy to settle and is easier to approach the surface of the impregnating adhesive layer, and the polyacrylate elastomer is used as an isolating agent to separate the anion powder from the melamine-formaldehyde resin, so that an air passage is easier to form on the surface of the anion powder, and the anion powder is beneficial to contacting with the outside air to release anions; in addition, the physical and chemical properties of the polyacrylate elastomer and the anion powder can also play a role in reinforcing and toughening the impregnation layer.)

1. A preparation method of impregnated paper with an anion release function is characterized in that: the method comprises the following steps:

(1) preparing modified powder: stirring and mixing 10-20 parts by weight of butyl acrylate, 6-10 parts by weight of methyl methacrylate, 1-3 parts by weight of trimethylolpropane trimethacrylate and 0.02-0.04 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 6-10 parts by weight of butyl acrylate, 4-8 parts by weight of styrene, 3-6 parts by weight of methyl methacrylate, 8-14 parts by weight of anion powder and 0.02-0.04 part by weight of initiator to prepare a second reaction monomer; adding 0.1-0.5 part by weight of emulsifier into 100 parts by weight of deionized water, stirring uniformly, adding a first reaction monomer, heating to 70-80 ℃, keeping the temperature for reaction for 60-90min, dropwise adding a second reaction monomer at a constant speed within 0.5-1.5h, keeping the temperature for reaction for 50-70min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain modified powder;

(2) preparing the impregnating adhesive: adding an alkaline regulator into 100 parts by weight of 35-40% formaldehyde aqueous solution, regulating the pH value to 8.5-9.5, heating to 40-50 ℃, then adding 20-30 parts by weight of melamine and 30-40 parts by weight of urea, heating to 90-95 ℃, carrying out heat preservation reaction for 40-60min, then adding an acidic regulator, regulating the pH value to 5.5-6.0, adding 8-12 parts by weight of polyethylene glycol, stirring uniformly, continuing to carry out heat preservation reaction for 30-50min, adding the alkaline regulator, regulating the pH value to 8.0-9.0, adding 20-30 parts by weight of melamine, continuing to carry out heat preservation reaction for 60-80min, cooling to 40-50 ℃, adding 5-15 parts by weight of urea, stirring, carrying out heat preservation reaction for 10-20min, and cooling to normal temperature to obtain an impregnating compound for later use;

(3) dipping: adding 8-12 parts by weight of modified powder into 100 parts by weight of impregnating compound, uniformly stirring, impregnating the base paper in the impregnating compound, extruding to remove redundant impregnating compound after impregnation, drying and cooling to obtain the impregnated paper with the anion release function.

2. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: the anion powder is tourmaline powder, and the average particle size of the anion powder is 2.6-6.5 μm.

3. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: the initiator is ammonium persulfate or potassium persulfate.

4. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: the emulsifier is sodium dodecyl sulfate.

5. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: the polyethylene glycol is PEG-200, PEG-400 or PEG-600.

6. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: the alkaline regulator is a sodium hydroxide solution with the mass fraction of 10-30%, and the acidic regulator is a formic acid solution with the mass fraction of 2-5%.

7. The method for preparing impregnated paper with anion releasing function as claimed in claim 1, wherein: in the step (3), the gluing amount is 40-60g/m²The drying temperature is 100-110 ℃, and the drying is carried out until the water content of the base paper does not exceed 12 percent.

8. The impregnated paper with the negative ion release function is characterized in that: the impregnated paper with the anion releasing function is prepared by the method of any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of impregnated paper, in particular to impregnated paper with an anion release function and a preparation method thereof.

Background

The impregnated paper is prepared by taking specially produced base paper as a main material, impregnating the base paper with synthetic resin and drying the impregnated base paper, covering the base paper on the artificial board, and performing hot-pressing adhesion to form decorative paper, so that the aesthetic property of the artificial board is improved. At present, the commonly used synthetic resins of the impregnating compound are mainly phenolic resin, urea resin and melamine formaldehyde resin, wherein the melamine formaldehyde resin becomes the most common impregnating resin with the most extensive application in the market at present due to the higher cost performance of the melamine formaldehyde resin.

The anion powder is made of natural materials, mainly containing silicate substances with aluminum, sodium, iron and lithium ring structures which are characterized by containing boron, by a nano technology, and has the characteristics of releasing hydroxyl anions for a long time and high-efficiency antibiosis. The anion powder can effectively eliminate indoor peculiar smell and various harmful gases. For example, the irritant gases such as benzene, formaldehyde, ketone, ammonia and the like volatilized from the decorative materials used in the indoor decoration process and the peculiar smell generated in daily life can be effectively eliminated by using the coating and the decorative base material containing the anion powder, and the released air anions can be effectively eliminated.

The anion releasing function can be imparted by adding anion powder to impregnated paper, but there are two mechanisms of anion generation: one is a photocatalytic mechanism, in which natural light or far infrared rays are radiated to tourmaline crystals Fe²⁺－Fe³⁺The hole/electron pair is formed around the substrate, and the generated hole (h)⁺) The water molecules adsorbed on the surface of the tourmaline are oxidized into hydroxyl free radicals, and hydrated hydroxyl ions are formed when the hydroxyl free radicals are diffused into water; in addition, when Fe is in Y position of tourmaline²⁺Conversion to Fe³⁺When in use, oxygen molecules adsorbed on the surface of the tourmaline particles are reduced into oxygen anion free radicals, and the oxygen anion free radicals can also react with water molecules on the surface of the particles to generate hydroxyl free radicals, and then are associated with redundant water molecules to form hydrated hydroxyl ions. The other is an electrolytic water mechanism, namely the electrode generated by the spontaneous polarization effect of the tourmaline crystal enables water molecules around the electrode to generateThe generated hydroxide ions are combined with water molecules or other molecules to form negative ions under the action of electrolysis. The two modes require that the anion powder is close to water molecules or oxygen molecules, the anion powder needs to be distributed on the surface of the impregnating compound, the anion release function is realized by coating a layer of anion powder film outside the impregnating compound, but the secondary coating process is complicated, one curing process needs to be carried out, the production cost is high, and the cost of the coating is also high.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide impregnated paper with an anion releasing function and a preparation method thereof.

The purpose of the invention is realized by the following technical scheme:

a preparation method of impregnated paper with an anion release function comprises the following steps:

(1) preparing modified powder: stirring and mixing 10-20 parts by weight of butyl acrylate, 6-10 parts by weight of methyl methacrylate, 1-3 parts by weight of trimethylolpropane trimethacrylate and 0.02-0.04 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 6-10 parts by weight of butyl acrylate, 4-8 parts by weight of styrene, 3-6 parts by weight of methyl methacrylate, 8-14 parts by weight of anion powder and 0.02-0.04 part by weight of initiator to prepare a second reaction monomer; adding 0.1-0.5 part by weight of emulsifier into 100 parts by weight of deionized water, stirring uniformly, adding a first reaction monomer, heating to 70-80 ℃, keeping the temperature for reaction for 60-90min, dropwise adding a second reaction monomer at a constant speed within 0.5-1.5h, keeping the temperature for reaction for 50-70min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain modified powder;

(2) preparing the impregnating adhesive: adding an alkaline regulator into 100 parts by weight of 35-40% formaldehyde aqueous solution, regulating the pH value to 8.5-9.5, heating to 40-50 ℃, then adding 20-30 parts by weight of melamine and 30-40 parts by weight of urea, heating to 90-95 ℃, carrying out heat preservation reaction for 40-60min, then adding an acidic regulator, regulating the pH value to 5.5-6.0, adding 8-12 parts by weight of polyethylene glycol, stirring uniformly, continuing to carry out heat preservation reaction for 30-50min, adding the alkaline regulator, regulating the pH value to 8.0-9.0, adding 20-30 parts by weight of melamine, continuing to carry out heat preservation reaction for 60-80min, cooling to 40-50 ℃, adding 5-15 parts by weight of urea, stirring, carrying out heat preservation reaction for 10-20min, and cooling to normal temperature to obtain an impregnating compound for later use;

(3) dipping: adding 8-12 parts by weight of modified powder into 100 parts by weight of impregnating compound, uniformly stirring, impregnating the base paper in the impregnating compound, extruding to remove redundant impregnating compound after impregnation, drying and cooling to obtain the impregnated paper with the anion release function.

According to the invention, an independent negative ion coating is not prepared, and negative ion powder is not directly added into the impregnating compound, but a polyacrylate elastomer with a core-shell structure is prepared by free radical initiated polymerization, butyl acrylate, methyl methacrylate and trimethylolpropane trimethacrylate are used as monomers to form an inner core, the butyl acrylate and the methyl methacrylate are respectively used as a soft monomer and a hard monomer to form a polymer with proper strength, and a trimethylolpropane trimethacrylate reinforced crosslinking structure is introduced to ensure that the molecular cohesion is contracted, thereby being beneficial to reducing the particle size of polyacrylate latex; and in the synthesis of the shell, butyl acrylate is used as a soft monomer, styrene and methyl methacrylate are used as hard monomers, and the anion powder is added in the synthesis process, so that a harder shell is formed, the anion powder is adsorbed on the surface of the shell, the attachment effect is good, and a plurality of emulsion particles can be attached to a single anion powder particle due to the small particle size of the emulsion particles reaching 289-411nm, so that the dispersibility and the suspension stability of the anion powder and the compatibility of the anion powder and the melamine-formaldehyde resin can be effectively improved. After the prepared modified powder is mixed with the impregnating adhesive and cured, the polyacrylate elastomer can ensure that the anion powder is not easy to settle and is easier to approach the surface of the impregnating adhesive layer, and the polyacrylate elastomer is used as an isolating agent to separate the anion powder from the melamine-formaldehyde resin, so that an air passage is easier to form on the surface of the anion powder, and the anion powder is beneficial to contacting with the outside air to release anions; in addition, the physical and chemical properties of the polyacrylate elastomer and the anion powder can also play a role in reinforcing and toughening the impregnation layer.

Wherein the anion powder is tourmaline powder, and the average particle size of the anion powder is 2.6-6.5 μm.

Wherein the initiator is ammonium persulfate or potassium persulfate.

Wherein the emulsifier is sodium dodecyl sulfate

Wherein the polyethylene glycol is PEG-200, PEG-400 or PEG-600.

Wherein the alkaline regulator is a sodium hydroxide solution with the mass fraction of 10-30%, and the acidic regulator is a formic acid solution with the mass fraction of 2-5%.

Wherein in the step (3), the gluing amount is 40-60g/m²The drying temperature is 100-110 ℃, and the drying is carried out until the water content of the base paper does not exceed 12 percent.

The impregnated paper with the negative ion release function is prepared by the preparation method of the impregnated paper with the negative ion release function.

The invention has the beneficial effects that: according to the invention, an independent negative ion coating is not prepared, and negative ion powder is not directly added into the impregnating compound, but a polyacrylate elastomer with a core-shell structure is prepared by free radical initiated polymerization, butyl acrylate, methyl methacrylate and trimethylolpropane trimethacrylate are used as monomers to form an inner core, the butyl acrylate and the methyl methacrylate are respectively used as a soft monomer and a hard monomer to form a polymer with proper strength, and a trimethylolpropane trimethacrylate reinforced crosslinking structure is introduced to ensure that the molecular cohesion is contracted, thereby being beneficial to reducing the particle size of polyacrylate latex; and in the synthesis of the shell, butyl acrylate is used as a soft monomer, styrene and methyl methacrylate are used as hard monomers, and the anion powder is added in the synthesis process, so that a harder shell is formed, the anion powder is adsorbed on the surface of the shell, the attachment effect is good, and a plurality of emulsion particles can be attached to a single anion powder particle due to the small particle size of the emulsion particles reaching 289-411nm, so that the dispersibility and the suspension stability of the anion powder and the compatibility of the anion powder and the melamine-formaldehyde resin can be effectively improved. After the prepared modified powder is mixed with the impregnating adhesive and cured, the polyacrylate elastomer can ensure that the anion powder is not easy to settle and is easier to approach the surface of the impregnating adhesive layer, and the polyacrylate elastomer is used as an isolating agent to separate the anion powder from the melamine-formaldehyde resin, so that an air passage is easier to form on the surface of the anion powder, and the anion powder is beneficial to contacting with the outside air to release anions; in addition, the physical and chemical properties of the polyacrylate elastomer and the anion powder can also play a role in reinforcing and toughening the impregnation layer.

Detailed Description

The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.

Example 1

A preparation method of impregnated paper with an anion release function comprises the following steps:

(1) preparing modified powder: stirring and mixing 15 parts by weight of butyl acrylate, 8 parts by weight of methyl methacrylate, 2 parts by weight of trimethylolpropane trimethacrylate and 0.03 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 8 parts by weight of butyl acrylate, 6 parts by weight of styrene, 4.5 parts by weight of methyl methacrylate, 11 parts by weight of anion powder and 0.03 part by weight of initiator to prepare a second reaction monomer; adding 0.3 weight part of emulsifier into 100 weight parts of deionized water, stirring uniformly, adding a first reaction monomer, heating to 75 ℃, keeping the temperature for reaction for 75min, dropwise adding a second reaction monomer at a constant speed within 1h, keeping the temperature for reaction for 60min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain modified powder;

(2) preparing the impregnating adhesive: adding an alkaline regulator into 100 parts by weight of 35% formaldehyde aqueous solution, regulating the pH value to 9.0, heating to 450 ℃, then adding 25 parts by weight of melamine and 35 parts by weight of urea, heating to 92.5 ℃, carrying out heat preservation reaction for 50min, then adding an acidic regulator, regulating the pH value to 5.8, adding 10 parts by weight of polyethylene glycol, stirring uniformly, continuing to carry out heat preservation reaction for 40min, adding the alkaline regulator, regulating the pH value to 8.5, adding 25 parts by weight of melamine, continuing to carry out heat preservation reaction for 70min, cooling to 45 ℃, adding 10 parts by weight of urea, stirring, carrying out heat preservation reaction for 15min, cooling to normal temperature to obtain an impregnating adhesive for later use;

(3) dipping: adding 10 parts by weight of modified powder into 100 parts by weight of impregnating compound, uniformly stirring, impregnating the base paper in the impregnating compound, extruding to remove redundant impregnating compound after impregnation, drying, and cooling to obtain the impregnated paper with the anion release function.

Wherein the anion powder is tourmaline powder, and the average grain diameter of the anion powder is 4.3 μm.

Wherein the initiator is ammonium persulfate.

Wherein the emulsifier is sodium dodecyl sulfate

Wherein the polyethylene glycol is PEG-400.

The alkaline regulator is a sodium hydroxide solution with the mass fraction of 20%, and the acidic regulator is a formic acid solution with the mass fraction of 3.5%.

Wherein in the step (3), the gluing amount is 50g/m²Drying at 105 deg.C until the water content of the base paper is not more than 12%.

The impregnated paper with the negative ion release function is prepared by the preparation method of the impregnated paper with the negative ion release function.

Example 2

A preparation method of impregnated paper with an anion release function comprises the following steps:

(1) preparing modified powder: stirring and mixing 10 parts by weight of butyl acrylate, 6 parts by weight of methyl methacrylate, 1 part by weight of trimethylolpropane trimethacrylate and 0.02 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 6 parts by weight of butyl acrylate, 4 parts by weight of styrene, 3 parts by weight of methyl methacrylate, 8 parts by weight of anion powder and 0.02 part by weight of initiator to prepare a second reaction monomer; adding 0.1 part by weight of emulsifier into 100 parts by weight of deionized water, stirring uniformly, adding a first reaction monomer, heating to 70 ℃, keeping the temperature for reaction for 60min, dropwise adding a second reaction monomer at a constant speed within 0.5h, keeping the temperature for reaction for 50min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain modified powder;

(2) preparing the impregnating adhesive: adding an alkaline regulator into 100 parts by weight of a formaldehyde aqueous solution with the mass fraction of 37.5%, regulating the pH value to 8.5, heating to 40 ℃, then adding 20 parts by weight of melamine and 30 parts by weight of urea, heating to 90 ℃, carrying out heat preservation reaction for 40min, then adding an acidic regulator, regulating the pH value to 5.5, adding 8 parts by weight of polyethylene glycol, stirring uniformly, continuing to carry out heat preservation reaction for 30min, adding the alkaline regulator, regulating the pH value to 8.0, adding 20 parts by weight of melamine, continuing to carry out heat preservation reaction for 60min, cooling to 40 ℃, adding 5 parts by weight of urea, stirring, carrying out heat preservation reaction for 10min, cooling to normal temperature, and obtaining an impregnating adhesive for later use;

(3) dipping: adding 8 parts by weight of modified powder into 100 parts by weight of impregnating compound, uniformly stirring, impregnating the base paper in the impregnating compound, extruding to remove redundant impregnating compound after impregnation, drying, and cooling to obtain the impregnated paper with the anion release function.

Wherein the anion powder is tourmaline powder, and the average particle size of the anion powder is 2.6 μm.

Wherein the initiator is potassium persulfate.

Wherein the emulsifier is sodium dodecyl sulfate

Wherein the polyethylene glycol is PEG-200.

The alkaline regulator is a sodium hydroxide solution with the mass fraction of 10%, and the acidic regulator is a formic acid solution with the mass fraction of 2%.

Wherein in the step (3), the gluing amount is 40g/m²Drying at 100 deg.C until the water content of the base paper is not more than 12%.

The impregnated paper with the negative ion release function is prepared by the preparation method of the impregnated paper with the negative ion release function.

Example 3

A preparation method of impregnated paper with an anion release function comprises the following steps:

(1) preparing modified powder: stirring and mixing 20 parts by weight of butyl acrylate, 10 parts by weight of methyl methacrylate, 3 parts by weight of trimethylolpropane trimethacrylate and 0.04 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 10 parts by weight of butyl acrylate, 8 parts by weight of styrene, 6 parts by weight of methyl methacrylate, 14 parts by weight of anion powder and 0.04 part by weight of initiator to prepare a second reaction monomer; adding 0.5 part by weight of emulsifier into 100 parts by weight of deionized water, stirring uniformly, adding a first reaction monomer, heating to 80 ℃, keeping the temperature for reaction for 90min, dropwise adding a second reaction monomer at a constant speed within 1.5h, keeping the temperature for reaction for 70min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain modified powder;

(2) preparing the impregnating adhesive: adding an alkaline regulator into 100 parts by weight of a formaldehyde aqueous solution with the mass fraction of 40%, regulating the pH value to 9.5, heating to 50 ℃, then adding 30 parts by weight of melamine and 40 parts by weight of urea, heating to 95 ℃, carrying out heat preservation reaction for 60min, then adding an acidic regulator, regulating the pH value to 6.0, adding 12 parts by weight of polyethylene glycol, stirring uniformly, continuing to carry out heat preservation reaction for 50min, adding the alkaline regulator, regulating the pH value to 9.0, adding 30 parts by weight of melamine, continuing to carry out heat preservation reaction for 80min, cooling to 50 ℃, adding 15 parts by weight of urea, stirring, carrying out heat preservation reaction for 20min, cooling to normal temperature, and obtaining an impregnating adhesive for later use;

(3) dipping: adding 12 parts by weight of modified powder into 100 parts by weight of impregnating compound, uniformly stirring, impregnating the base paper in the impregnating compound, extruding to remove redundant impregnating compound after impregnation, drying, and cooling to obtain the impregnated paper with the anion release function.

Wherein the anion powder is tourmaline powder, and the average particle size of the anion powder is 6.5 μm.

Wherein the initiator is ammonium persulfate.

Wherein the emulsifier is sodium dodecyl sulfate

Wherein the polyethylene glycol is PEG-600.

The alkaline regulator is a sodium hydroxide solution with the mass fraction of 30%, and the acidic regulator is a formic acid solution with the mass fraction of 5%.

Wherein in the step (3), the gluing amount is 60g/m²The drying temperature is 110 ℃, and the drying is carried out until the water content of the base paper is not more than 12%.

The impregnated paper with the negative ion release function is prepared by the preparation method of the impregnated paper with the negative ion release function.

Comparative example 1

This comparative example differs from example 1 in that:

preparing modified powder: stirring and mixing 15 parts by weight of butyl acrylate, 8 parts by weight of methyl methacrylate, 2 parts by weight of trimethylolpropane trimethacrylate and 0.03 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 8 parts by weight of butyl acrylate, 6 parts by weight of styrene, 4.5 parts by weight of methyl methacrylate and 0.03 part by weight of initiator to prepare a second reaction monomer; adding 0.3 part by weight of emulsifier into 100 parts by weight of deionized water, stirring uniformly, adding a first reaction monomer, heating to 75 ℃, keeping the temperature for reaction for 75min, dropwise adding a second reaction monomer at a constant speed within 1h, keeping the temperature for reaction for 60min after dropwise adding, adding 11 parts by weight of negative ion powder, stirring uniformly, demulsifying, precipitating, washing, and drying to obtain modified powder;

comparative example 2

This comparative example differs from example 1 in that:

preparing modified powder: stirring and mixing 15 parts by weight of butyl acrylate, 8 parts by weight of methyl methacrylate and 0.03 part by weight of initiator to prepare a first reaction monomer; stirring and mixing 8 parts by weight of butyl acrylate, 6 parts by weight of styrene, 4.5 parts by weight of methyl methacrylate, 11 parts by weight of anion powder and 0.03 part by weight of initiator to prepare a second reaction monomer; adding 0.3 weight part of emulsifier into 100 weight parts of deionized water, stirring uniformly, adding a first reaction monomer, heating to 75 ℃, keeping the temperature for reaction for 75min, dropwise adding a second reaction monomer at a constant speed within 1h, keeping the temperature for reaction for 60min after dropwise adding, demulsifying, precipitating, washing, and drying to obtain the modified powder.

The impregnated papers of example 1, comparative example 1 and comparative example 2 were subjected to formation tests, the test indices and methods being as follows:

tensile strength: GB/T13022-1991

Impact strength: GB/T1843-2008

Surface bonding strength: GB/T15102-2006

Formaldehyde emission: GB/T17657-2013 climate box method

The release amount of negative ions is as follows: JCT1016-2006

The test results were as follows:

	example 1	Comparative example 1	Comparative example 2
				Tensile Strength (MPa)	72.5	61.6	66.4
Impact strength (KJ/m)2)	2.92	2.12	2.27
				Surface bonding Strength (MPa)	2.82	2.24	2.38
Formaldehyde emission (mg/L)	1.08	1.06	1.12
				Negative ion release amount (/ 24h)	1852	1655	1592

As can be seen from the comparison between example 1 and comparative example 1, the simple and direct physical blending of the anion powder and the polyacrylate is not beneficial to the dispersion of the anion powder in the impregnation adhesive layer, so that each property is obviously reduced; the synthesis of polyacrylate core without the addition of trimethylolpropane trimethacrylate can lead to overlarge latex particles which are not beneficial to the dispersion of negative ion powder in the dipping glue layer, so that all properties are obviously reduced.

The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.