CN112519370B - Multi-layer foaming plastic board containing phosphogypsum and preparation method thereof - Google Patents
Multi-layer foaming plastic board containing phosphogypsum and preparation method thereof Download PDFInfo
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- CN112519370B CN112519370B CN202011400623.XA CN202011400623A CN112519370B CN 112519370 B CN112519370 B CN 112519370B CN 202011400623 A CN202011400623 A CN 202011400623A CN 112519370 B CN112519370 B CN 112519370B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/025—Polyolefin
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/718—Weight, e.g. weight per square meter
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- C—CHEMISTRY; METALLURGY
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- 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
- C08J2323/06—Polyethene
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- C08J2429/00—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
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- 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
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- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Abstract
The invention discloses a multi-layer foaming plastic board containing phosphogypsum and a preparation method thereof. Relates to the technical field of packaging materials. The multilayer structure is composed of three layers of calcium-plastic paper on the surface layer, a single-layer foaming plastic board containing the phosphogypsum on the core layer and calcium-plastic paper on the bottom layer, and provides raw materials and a preparation method. According to the invention, the heavy metals in the phosphogypsum can be solidified by hydrogen bonds and cross-linking action formed by polyethylene glycol, polyvinyl alcohol and crystal water in the phosphogypsum, and the interface interaction and interlayer bonding can be improved, so that the problem that a multilayer calcium-plastic board needs a binder for bonding is solved; in addition, the crystal water in the phosphogypsum is partially dehydrated to generate bubbles, so that the weight of the calcium plastic plate is reduced, the buffering power is improved, and a foaming agent is not required to be added for foaming. The application field of the phosphogypsum is expanded.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a multi-layer foaming plastic board containing phosphogypsum and a preparation method thereof.
Background
Compared with a paper board, the calcium plastic board has the advantages of wear resistance, firmness, mildew resistance, good sealing property and the like, is used for manufacturing a packing box, and is rapidly popularized. The single-layer calcium-plastic corrugated board is formed by thermally bonding surface layer calcium-plastic paper, core layer calcium-plastic corrugated paper and bottom layer calcium-plastic paper, is a common material of a packing box, but due to the fact that corrugated ribs are sparse and high and the thickness of the board is large, the surface flatness of the surface layer calcium-plastic paper is poor, and difficulty is brought to the printing of relevant characters on the surface of the packing box; and because the board is thicker, when the periphery of the box body is folded along the trace, the bounce is high, and the box body needs to be manually carried out one by one, so that the box body is difficult to be packaged by mechanized flowing water.
The prior art is more concerned with this, for example: aiming at reducing the corrugation thickness (2.3-2.5 mm) of a single-layer calcium-plastic corrugated board and increasing the number of the corrugated sheets (23-25 sheets/100 mm) in unit area, the flatness of the calcium-plastic paper on the surface layer is improved, and the level of mechanized printing and mechanized flow packaging is improved; or, the production cost of the calcium-plastic corrugated board is reduced by adding the calcium-plastic reclaimed material; or, preparing the calcium plastic board by adding modified calcium carbonate and PVC; or the foaming agent is added to foam the material to provide the heat preservation and sound insulation functions, or the EPE pearl cotton layer is covered on the surface of the calcium plastic plate to avoid the surface of the calcium plastic plate from being scratched and damaged, and meanwhile, the composite calcium plastic plate has better shock absorption, so that the prepared calcium plastic box is suitable for packaging and storing fragile products. However, these benefits require the addition of a binder to solve the interfacial adhesion problem.
Therefore, how to solve the interfacial adhesion, reduce weight, improve cushioning ability and reduce additives is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a multi-layer foamed plastic board containing phosphogypsum and a preparation method thereof.
The method has the advantages of not only needing no binder but also needing no foaming agent, improving the shock resistance of the plastic plate, reducing the weight and optimizing the preparation raw materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-layer foamed plastic panel comprising phosphogypsum, comprising: a surface layer, a core layer and a bottom layer; wherein, the surface layer and the bottom layer are both calcium plastic paper; the core layer is a single-layer foaming plastic plate containing phosphogypsum; the core layer comprises the following raw materials in parts by mass: 55 to 60 parts of polyethylene, 20 to 30 parts of phosphogypsum, 2.5 to 3 parts of polyethylene glycol, 1.5 to 2 parts of polyvinyl alcohol, 0.5 to 1.0 part of stearic acid, 0.02 to 0.04 part of antioxidant, 2.0 to 2.5 parts of titanium dioxide and 2.0 to 2.5 parts of zinc stearate.
Preferably: the calcium plastic paper comprises the following raw materials in parts by mass: 55 to 60 parts of polyethylene, 2.5 to 3 parts of polyethylene glycol, 1.5 to 2 parts of polyvinyl alcohol, 0.5 to 1.0 part of stearic acid, 0.02 to 0.04 part of antioxidant, 2.0 to 2.5 parts of titanium dioxide and 2.0 to 2.5 parts of zinc stearate.
Preferably, the following components: the core layer comprises the following raw materials in parts by mass: 58 parts of polyethylene, 25 parts of phosphogypsum, 2.8 parts of polyethylene glycol, 1.8 parts of polyvinyl alcohol, 0.7 part of stearic acid, 0.03 part of antioxidant, 2.2 parts of titanium dioxide and 2.2 parts of zinc stearate; the calcium plastic paper comprises the following raw materials: 58 parts of polyethylene, 2.8 parts of polyethylene glycol, 1.8 parts of polyvinyl alcohol, 0.7 part of stearic acid, 0.03 part of antioxidant, 2.2 parts of titanium dioxide and 2.3 parts of zinc stearate.
Preferably:
preferably: the antioxidant is 2- (2H-benzotriazole-2-yl) -4, 6-di-tert-amylphenol.
The invention also provides a preparation method of the multi-layer foaming plastic plate containing the phosphogypsum, which comprises the following steps:
(1) Preparing a single-layer foaming plastic board containing the phosphogypsum of the core layer:
11 Kneading and stirring polyethylene, phosphogypsum, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate to obtain a material A;
12 Plasticating and calendering: plasticizing the material A to obtain a phosphorus-containing gypsum single-layer foamed plastic board of the core layer;
(2) Preparing calcium plastic paper: kneading and stirring polyethylene, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate, and rolling and plasticizing;
(3) Hot sticking and pressing: simultaneously processing the calcium-plastic paper on the surface layer, the phosphogypsum single-layer foamed plastic board on the core layer and the calcium-plastic paper on the bottom layer by a hot roller;
(4) Cooling, trimming and shaping to obtain the multi-layer foaming plastic plate containing the phosphogypsum.
Has the advantages that: step (2), hydrogen bonds and cross-linking effects are formed between the polyethylene glycol and the polyvinyl alcohol on the surface layer and the bottom layer and between the polyethylene glycol and the polyvinyl alcohol in the core layer and the crystal water in the phosphogypsum, so that the interface interaction and interlayer bonding are improved, and the problem that the multilayer calcium-plastic plate needs to be bonded by a bonding agent is solved;
polyethylene glycol and polyvinyl alcohol in the material in the step (3) and crystal water in phosphogypsum form hydrogen bonds and cross-linking effects, so that the interaction of three layers of interfaces is improved;
and further: and (4) determining the size of the calcium-plastic corrugated board of the batch according to the external dimension requirement of the packing box to be processed while cutting burrs.
Further: and air cooling is adopted for solidification.
Preferably, the following components: pre-treating phosphogypsum: grinding the phosphogypsum, screening to obtain powder with the grain size less than or equal to 50 microns, and drying for 16-24 hours at the temperature of 40-45 ℃ to obtain the phosphogypsum.
Preferably, the following components: the kneading and stirring temperature of the step 11) is 130-140 ℃, the stirring speed is 110-120 r/min, and the kneading time is 5-10 min.
The beneficial effects are that: under the process parameters, the crystal water of gypsum in the raw materials can not be decomposed while the materials are kneaded and stirred uniformly.
Preferably, the following components: and step 12), plasticizing at 170-220 deg.c, mechanically pressing to 30-33 MPa for 2-3 min, and rolling to thickness of 1.05-1.1 mm.
The beneficial effects are that: under the technological parameters, the gypsum crystal water can be rapidly decomposed in the core plate forming process, and the core plate foam holes can be rapidly and uniformly formed.
Preferably: kneading and stirring, rolling and plasticizing: the temperature of kneading and stirring is 130-140 ℃, the stirring speed is 110-120 r/min, the kneading time is 5-10 min, the plasticizing temperature is 170-220 ℃, the mechanical pressure is applied to 30-33 Mpa, the plasticizing time is 2-3 min, and the rolling is carried out until the thickness is 0.55-0.6 mm.
Preferably: the surface roller temperature of the hot roller treatment in the step (3) is 185-190 ℃, and the distance is 1.9-2 mm.
Has the advantages that: under the process parameters, the polyethylene glycol and the polyvinyl alcohol in the core layer material and the residual crystal water in the gypsum can be ensured to quickly form a hydrogen bond and a cross-linking structure, and simultaneously, the polyethylene glycol and the polyvinyl alcohol between the three layers of plates quickly form a hydrogen bond and a cross-linking effect, so that the interface interaction and the interlayer bonding are improved, and the problem that the multilayer calcium-plastic plate needs a bonding agent to be bonded is solved.
According to the technical scheme, compared with the prior art, the invention discloses and provides the multi-layer foaming plastic board containing the phosphogypsum and the preparation method thereof, and the technical effects are that the interface interaction and the interlayer bonding can be improved while the heavy metal in the phosphogypsum is cured through the hydrogen bond and the crosslinking action formed by the polyethylene glycol, the polyvinyl alcohol and the crystal water in the phosphogypsum, and the problem that the multi-layer calcium plastic board needs the bonding agent for bonding is solved; in addition, the crystal water in the phosphogypsum is partially dehydrated to generate bubbles, so that the weight of the calcium-plastic plate is reduced, the buffering power is improved, and a foaming agent is not required to be added for foaming. The application field of the phosphogypsum is expanded.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A multi-layer foamed plastic panel comprising phosphogypsum, comprising: a surface layer, a core layer and a bottom layer; wherein, the surface layer and the bottom layer are both calcium plastic paper; the core layer is a single-layer foaming plastic plate containing phosphogypsum; the core layer comprises the following raw materials in parts by mass: 55g of polyethylene, 20g of phosphogypsum, 2.5g of polyethylene glycol, 1.5g of polyvinyl alcohol, 0.5g of stearic acid, 0.02g of 2- (2H-benzotriazol-2-yl) -4, 6-di-tert-amylphenol (antioxidant), 2.0g of titanium dioxide and 2.0g of zinc stearate.
The calcium plastic paper comprises the following raw materials in parts by mass: 55g of polyethylene, 2.5g of polyethylene glycol, 1.5g of polyvinyl alcohol, 0.5g of stearic acid, 0.02g of 2- (2H-benzotriazol-2-yl) -4, 6-di-tert-amylphenol, 2.0g of titanium dioxide and 2.0g of zinc stearate.
The preparation method comprises the following steps:
phosphogypsum needs to be pretreated: grinding phosphogypsum, sieving to obtain powder with particle size not greater than 50 μm, and drying at 40 deg.C for 16 hr.
11 Kneading and stirring polyethylene, phosphogypsum, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate to obtain a material A;
12 Plasticating and calendering: plasticizing the material A to obtain a single-layer foaming plastic board containing the phosphogypsum of the core layer;
(2) Preparing calcium plastic paper: kneading and stirring polyethylene, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate, and rolling and plasticizing;
(3) Hot sticking and pressing: simultaneously processing the calcium-plastic paper on the surface layer, the phosphogypsum single-layer foamed plastic board on the core layer and the calcium-plastic paper on the bottom layer by a hot roller;
(4) Cooling, cutting edge and shaping to obtain the multi-layer foaming plastic plate containing the phosphogypsum.
In order to further optimize the technical scheme: step 11), the kneading and stirring temperature is 130 ℃, the stirring speed is 110r/min, and the kneading time is 5min.
In order to further optimize the technical scheme: and step 12), plasticizing at 170 ℃, mechanically pressing to 30Mpa, plasticizing for 2min, and rolling to a thickness of 1.05mm.
In order to further optimize the technical scheme: kneading and stirring, rolling and plasticizing: the kneading and stirring temperature is 130 ℃, the stirring speed is 110r/min, the kneading time is 5min, the plasticizing temperature is 170 ℃, the mechanical pressure is increased to 30Mpa, the plasticizing time is 2min, and the rolling is carried out until the thickness is 0.55mm.
In order to further optimize the technical scheme: the surface roller temperature of the hot roller treatment in the step (3) is 185 ℃, and the distance is 1.9mm.
Example 2
A multi-layer foamed plastic panel comprising phosphogypsum, comprising: a surface layer, a core layer and a bottom layer; wherein, the surface layer and the bottom layer are both calcium plastic paper; the core layer is a single-layer foaming plastic plate containing phosphogypsum; the core layer comprises the following raw materials in parts by mass: 58g of polyethylene, 25g of phosphogypsum, 2.7g of polyethylene glycol, 1.8g of polyvinyl alcohol, 0.7g of stearic acid, 0.03g of 2- (2H-benzotriazol-2-yl) -4, 6-di-tert-amylphenol (antioxidant), 2.2g of titanium dioxide and 2.3g of zinc stearate.
The calcium plastic paper comprises the following raw materials in parts by mass: 58g of polyethylene, 2.7g of polyethylene glycol, 1.8g of polyvinyl alcohol, 0.7g of stearic acid, 0.03g of antioxidant, 2.2g of titanium dioxide and 2.3g of zinc stearate.
The preparation method comprises the following steps:
phosphogypsum needs to be pretreated: grinding phosphogypsum, sieving to obtain powder with particle size of less than or equal to 50 microns, and drying at 43 deg.C for 20 hr.
11 Kneading and stirring polyethylene, phosphogypsum, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate to obtain a material A;
12 Plasticating and calendering: plasticizing the material A to obtain a phosphorus-containing gypsum single-layer foamed plastic board of the core layer;
(2) Preparing calcium plastic paper: kneading and stirring polyethylene, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate, and rolling and plasticizing;
(3) Hot sticking and pressing: simultaneously processing the calcium-plastic paper on the surface layer, the phosphogypsum single-layer foamed plastic board on the core layer and the calcium-plastic paper on the bottom layer by a hot roller;
(4) Cooling, trimming and shaping to obtain the multi-layer foaming plastic plate containing the phosphogypsum.
In order to further optimize the technical scheme: the kneading and stirring temperature of the step 11) is 135 ℃, the stirring speed is 115r/min, and the kneading time is 8min.
In order to further optimize the technical scheme: and step 12), plasticizing at 200 ℃, mechanically pressing to 32Mpa for 2.5min, and rolling to a thickness of 1.08mm.
In order to further optimize the technical scheme: kneading and stirring, rolling and plasticizing: the kneading and stirring temperature is 135 ℃, the stirring speed is 115r/min, the kneading time is 8min, the plasticizing temperature is 200 ℃, the mechanical pressure is increased to 32Mpa, the plasticizing time is 2.5min, and the rolling is carried out until the thickness is 0.58mm.
In order to further optimize the technical scheme: the surface roll temperature of the hot roll treatment in the step (3) is 188 ℃, and the distance is 1.95mm.
Example 3
A multi-layer foamed plastic panel comprising phosphogypsum, comprising: a surface layer, a core layer and a bottom layer; wherein, the surface layer and the bottom layer are both calcium plastic paper; the core layer is a single-layer foaming plastic plate containing phosphogypsum; the core layer comprises the following raw materials in parts by mass: 60g of polyethylene, 30g of phosphogypsum, 3g of polyethylene glycol, 2g of polyvinyl alcohol, 1.0g of stearic acid, 0.04g of 2- (2H-benzotriazol-2-yl) -4, 6-di-tert-amylphenol (antioxidant), 2.5g of titanium dioxide and 2.5g of zinc stearate.
The calcium plastic paper comprises the following raw materials in parts by mass: 60g of polyethylene, 3g of polyethylene glycol, 2g of polyvinyl alcohol, 1.0g of stearic acid, 0.04g of antioxidant, 2.5g of titanium dioxide and 2.5g of zinc stearate.
The preparation method comprises the following steps:
phosphogypsum needs to be pretreated: grinding phosphogypsum, sieving to obtain powder with particle size not greater than 50 μm, and drying at 45 deg.C for 24 hr.
11 Kneading and stirring polyethylene, phosphogypsum, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate to obtain a material A;
12 Plasticating and calendering: plasticizing the material A to obtain a single-layer foaming plastic board containing the phosphogypsum of the core layer;
(2) Preparing calcium plastic paper: kneading and stirring polyethylene, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate, and rolling and plasticizing;
(3) Hot sticking and pressing: simultaneously processing the calcium-plastic paper on the surface layer, the phosphogypsum single-layer foamed plastic board on the core layer and the calcium-plastic paper on the bottom layer by a hot roller;
(4) Cooling, cutting edge and shaping to obtain the multi-layer foaming plastic plate containing the phosphogypsum.
In order to further optimize the technical scheme: the kneading and stirring temperature in the step 11) is 140 ℃, the stirring speed is 120r/min, and the kneading time is 10min.
In order to further optimize the technical scheme: and step 12), plasticizing at 220 ℃, mechanically pressing to 33Mpa, plasticizing for 3min, and rolling to obtain a rolled thickness of 1.1mm.
In order to further optimize the technical scheme: kneading and stirring, rolling and plasticizing: the kneading and stirring temperature is 140 ℃, the stirring speed is 120r/min, the kneading time is 10min, the plasticizing temperature is 220 ℃, the mechanical pressure is applied to 33Mpa, the plasticizing time is 3min, and the rolling is carried out until the thickness is 0.6mm.
In order to further optimize the technical scheme: and (4) the surface roller temperature of the hot roller treatment in the step (3) is 190 ℃, and the distance is 2mm.
Comparative example 1
The difference from the example 2 is only that the phosphogypsum and polyethylene glycol are omitted from the raw material components, and the rest is the same as the example 2.
Comparative example 2 (omitting Steps 2 and 3)
(1) 58g of polyethylene, 25g of calcium carbonate, 0.7g of stearic acid, 0.03g of 2- (2H-benzotriazole-2-yl) -4, 6-di-tert-amylphenol, 2.2g of titanium dioxide and 2.2g of zinc stearate are kneaded and stirred at the temperature of 135 ℃, the kneading time of 8min and the stirring speed of 120r/min to obtain a material A;
(2) Plasticizing and rolling: plasticizing the material A at 185 ℃, mechanically pressing to 33Mpa for 2min, and rolling to obtain a material with the thickness of 1.9mm; ,
(3) Cooling, trimming and shaping to obtain the polyethylene calcium plastic plate.
TABLE 1 comparison table of the properties of multi-layer foamed plastic board containing phosphogypsum and common polyethylene calcium plastic board
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Density (g/cm)3) | 0.97 | 1.02 | 1.03 | 1.05 | 1.16 |
| Force of breaking (N) | 379 | 375 | 371 | 306 | 364 |
| Plane compressive force (N) | 1318 | 1307 | 1296 | 1177 | 1287 |
| Vertical compressive force (N) | 797 | 785 | 741 | 550 | 769 |
| Tearing force (N) | 86 | 83 | 81 | 68 | 83 |
By combining the data in the table 1, the tearing force of the examples is greatly improved by comparing the examples 1, 2 and 3 with the comparative example 1, because the polyethylene glycol and the polyvinyl alcohol form hydrogen bonds and cross-linking actions with the crystal water in the phosphogypsum, the interface interaction and interlayer bonding are improved, and the problem that the multilayer calcium-plastic plate needs the bonding agent is solved;
comparing examples 1, 2 and 3 with comparative example 2, the density of the examples is greatly reduced, the plane compression force is improved slightly, because the crystal water in the phosphogypsum is partially dehydrated to generate bubbles to reduce the weight of the calcium plastic plate, and the polyethylene glycol and polyvinyl alcohol in the three-layer plate have hydrogen bonds and cross-linking effects.
The embodiments represent a significant advance over the prior art.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A multi-layer foamed plastic board containing phosphogypsum, which is characterized in that the board comprises: a surface layer, a core layer and a bottom layer; wherein the surface layer and the bottom layer are both calcium plastic paper; the core layer is a single-layer foaming plastic plate containing phosphogypsum; the core layer comprises the following raw materials in parts by mass: 55 to 60 parts of polyethylene, 20 to 30 parts of phosphogypsum, 2.5 to 3 parts of polyethylene glycol, 1.5 to 2 parts of polyvinyl alcohol, 0.5 to 1.0 part of stearic acid, 0.02 to 0.04 part of antioxidant, 2.0 to 2.5 parts of titanium dioxide and 2.0 to 2.5 parts of zinc stearate;
the calcium plastic paper comprises the following raw materials in parts by mass: 55 to 60 parts of polyethylene, 2.5 to 3 parts of polyethylene glycol, 1.5 to 2 parts of polyvinyl alcohol, 0.5 to 1.0 part of stearic acid, 0.02 to 0.04 part of antioxidant, 2.0 to 2.5 parts of titanium dioxide and 2.0 to 2.5 parts of zinc stearate.
2. The multi-layer foamed plastic board containing phosphogypsum as claimed in claim 1, characterized in that the core layer comprises the following raw materials in parts by mass: 58 parts of polyethylene, 25 parts of phosphogypsum, 2.8 parts of polyethylene glycol, 1.8 parts of polyvinyl alcohol, 0.7 part of stearic acid, 0.03 part of antioxidant, 2.2 parts of titanium dioxide and 2.2 parts of zinc stearate;
the calcium plastic paper comprises the following raw materials: 58 parts of polyethylene, 2.8 parts of polyethylene glycol, 1.8 parts of polyvinyl alcohol, 0.7 part of stearic acid, 0.03 part of antioxidant, 2.2 parts of titanium dioxide and 2.3 parts of zinc stearate.
3. The multi-layer foamed plastic board containing phosphogypsum as claimed in any one of claims 1 to 2, characterized in that the antioxidant is 2- (2H-benzotriazol-2-yl) -4, 6-di-tert-amylphenol.
4. A method for preparing the multi-layer foaming plastic board containing the phosphogypsum, which is characterized by comprising the following steps:
(1) Preparing a single-layer foaming plastic board containing the phosphogypsum of the core layer:
11 Kneading and stirring polyethylene, phosphogypsum, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate to obtain a material A;
12 Plasticating and calendering: plasticizing the material A to obtain a single-layer foaming plastic board containing the phosphogypsum of the core layer;
(2) Preparing calcium plastic paper: kneading and stirring polyethylene, polyethylene glycol, polyvinyl alcohol, stearic acid, an antioxidant, titanium dioxide and zinc stearate, and rolling and plasticizing;
(3) Hot sticking and pressing: simultaneously processing the calcium-plastic paper on the surface layer, the phosphogypsum single-layer foamed plastic board on the core layer and the calcium-plastic paper on the bottom layer by a hot roller;
(4) Cooling, trimming and shaping to obtain the multi-layer foaming plastic plate containing the phosphogypsum.
5. The process for the preparation of multilayer foamed plastic panels containing phosphogypsum according to claim 4, characterized in that the pre-treatment of phosphogypsum: grinding the phosphogypsum, screening to obtain powder with the particle size of less than or equal to 50 micrometers, and drying at the temperature of 40-45 ℃ for 16-24 hours to obtain the phosphogypsum.
6. The method for preparing the multi-layer foamed plastic board containing the phosphogypsum, as claimed in claim 4, wherein the kneading and stirring temperature in the step 11) is 130 to 140 ℃, the stirring speed is 110 to 120r/min, and the kneading time is 5 to 10min.
7. The method for preparing the multilayer foamed plastic board containing the phosphogypsum as claimed in claim 6, wherein in the step 12), the plasticizing temperature is 170 to 220 ℃, the mechanical pressing is carried out to 30 to 33Mpa, the plasticizing time is 2 to 3min, and the rolling is carried out to the thickness of 1.05 to 1.1mm.
8. The method for producing a multi-layer foamed plastic sheet containing phosphogypsum according to claim 4, wherein the kneading, stirring, rolling and plasticizing in the step (2): the kneading and stirring temperature is 130-140 ℃, the stirring speed is 110-120 r/min, the kneading time is 5-10 min, the plasticizing temperature is 170-220 ℃, the mechanical pressure is increased to 30-33 Mpa, the plasticizing time is 2-3 min, and the rolling is carried out until the thickness is 0.55-0.6 mm.
9. The method for preparing the multi-layer foamed plastic board containing the phosphogypsum as claimed in claim 4, wherein the surface roll temperature of the hot roll treatment in the step (3) is 185 to 190 ℃ and the distance between the surface rolls is 1.9 to 2mm.
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| AU2005297323B2 (en) * | 2004-10-18 | 2010-11-25 | Plantic Technologies Ltd | Barrier film |
| CN100493866C (en) * | 2006-08-08 | 2009-06-03 | 程苗根 | Thin type calcium-plastic corrugated board and its production method |
| US20120009367A1 (en) * | 2010-07-07 | 2012-01-12 | Menq-Fong Shieh | Pot and Preparation Methods of a Glass Fiber Reinforced Materials |
| CN102700213A (en) * | 2012-06-07 | 2012-10-03 | 安徽天和包装材料有限公司 | Calcium plastic corrugated board and production method thereof |
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