CN112608511A - Foam packing box of EPP heat-resistant beads with high surface hardening strength and preparation method thereof - Google Patents
Foam packing box of EPP heat-resistant beads with high surface hardening strength and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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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
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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Abstract
The invention provides a foam packing case of EPP heat-resistant beads with high surface hardening strength and a preparation method thereof, the EPP of the foam packing case is formed by assembling foamed plastics made of the EPP heat-resistant beads, and the EPP heat-resistant beads comprise the following components in parts by weight: polypropylene resin: 30-40 parts of micron silicon dioxide: 15-25 parts of foaming agent: 1-5 parts of a nucleating agent: 1-5 parts of a flame retardant: 1-5 parts of a coupling agent: 1-5 parts; the surface of the foam plastic is coated with a hardening coating, and the hardening coating comprises the following components in parts by weight: urethane acrylate: 30-40 parts of methyl methacrylate: 15-25 parts of isobornyl acrylate: 10-15 parts of butyl acrylate: 10-15 parts of nano silicon dioxide: 5-10 parts of a photoinitiator: 1-5 parts of an organic solvent: 60-70 parts. The foam packing box is formed by assembling foam plastics made of EPP heat-resistant beads, the EPP heat-resistant beads are reasonable in component composition, the used raw materials are green and environment-friendly, the surface strength of the finished product EPP beads is high, the production and preparation cost is low, and the economic benefit is good.
Description
Technical Field
The invention belongs to the technical field of EPP beads, and particularly relates to a foam packing box of high-surface-hardening-strength EPP heat-resistant beads and a preparation method thereof.
Background
The foam packing box is a box body formed by assembling foam plastics, the foam plastics are polymer materials formed by dispersing a large number of gas micropores in solid plastics, and the foam plastics have the characteristics of light weight, heat insulation, sound absorption, shock absorption and the like, have dielectric properties superior to matrix resin, and have wide application range. Almost all kinds of plastics can be made into foamed plastics, and foam molding has become an important field in plastic processing.
EPP is the abbreviation of Expanded polypropylene (Expanded polypropylene) and is a abbreviation for a new type of foam. EPP is a polypropylene plastic foaming material, is a high-crystallization polymer/gas composite material with excellent performance, and becomes the environment-friendly novel compression-resistant buffering heat-insulating material with the fastest growth due to the unique and superior performance. EPP is also an environment-friendly material, can be recycled and can be naturally degraded without causing white pollution.
The EPP has the advantages of light specific gravity, good elasticity, shock resistance, compression resistance, high deformation recovery rate, good absorption performance, oil resistance, acid resistance, alkali resistance, resistance to various chemical solvents, no water absorption, insulation, heat resistance (-40-130 ℃), no toxicity and no odor, can be recycled by 100 percent, has almost no reduction in performance, and is a real environment-friendly foam plastic. EPP articles of various shapes can be molded from the EPP beads in the mold of the molding machine.
EPP is widely applied to automobiles, such as bumper core materials, anti-collision blocks, roof and other lining parts, door filling, headrests, sun visors and the like, can save oil consumption and improve the safety factor of passengers.
EPP is widely used in the packaging industry, such as electronic products, medical appliances and the like, and particularly in the packaging of export products, the EPP becomes an irreplaceable package according to the requirement of environmental protection. It is non-toxic and has high temperature resistance, so that it is widely used in food packing and microwave heating.
For the preparation of EPP, Chinese patent with publication number CN109679227A discloses a preparation method of EPP beads capable of being rapidly molded, belonging to the technical field of environmental protection. The micron silicon dioxide is added for blending modification, the kettle type foaming process is utilized to prepare EPP beads, and then the steam is utilized for molding and thermoforming to prepare EPP formed bodies. However, the method for preparing EPP beads provided by this patent affects the quality of EPP moldings such as foam because of the pursuit of rapid molding.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a foam packing box of EPP heat-resistant beads with high surface hardening strength and a preparation method thereof, wherein the foam packing box is formed by assembling foamed plastics made of the EPP heat-resistant beads, the components of the EPP heat-resistant beads are reasonable, the used raw materials are green and environment-friendly, the finished product of the EPP beads has high surface strength, low production and preparation cost and good economic benefit.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a foam packing case of high case hardening strength EPP heat-resistant beads, the EPP is formed by assembling foam plastics made of EPP heat-resistant beads, and the EPP heat-resistant beads comprise the following components in parts by weight: polypropylene resin: 30-40 parts of micron silicon dioxide: 15-25 parts of foaming agent: 1-5 parts of a nucleating agent: 1-5 parts of a flame retardant: 1-5 parts of a coupling agent: 1-5 parts; the surface of the foam plastic is coated with a hardening coating, and the hardening coating comprises the following components in parts by weight: urethane acrylate: 30-40 parts of methyl methacrylate: 15-25 parts of isobornyl acrylate: 10-15 parts of butyl acrylate: 10-15 parts of nano silicon dioxide: 5-10 parts of a photoinitiator: 1-5 parts of an organic solvent: 60-70 parts.
Further, the polypropylene resin is high melt strength polypropylene.
Further, the foaming agent is aluminum oxide or barium sulfate.
Further, the nucleating agent is calcium stearate, talcum powder or bentonite.
Further, the flame retardant is magnesium hydroxide or aluminum hydroxide.
Further, the coupling agent is a titanate coupling agent.
Further, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone or 2-hydroxy-methylphenyl propane-1-ketone.
Further, the organic solvent is isopropanol or butanone.
Meanwhile, the invention also provides a preparation method of the foam packing box of the EPP heat-resistant bead with high surface hardening strength, which comprises the following steps:
1) preparation of beads
1.1) feeding polypropylene resin, micron silicon dioxide, a foaming agent, a nucleating agent, a flame retardant and a coupling agent into a stirrer according to a ratio, heating to 100-150 ℃, stirring and mixing for 10-15 minutes at a rotating speed of 3000-4000 revolutions per minute, and feeding into a double-screw extruder for melt extrusion granulation to obtain master batches after mixing;
1.2) feeding the master batch obtained in the step 1.1) into a foaming kettle, heating to 150-200 ℃, boosting to 4-5 MPa, and then instantly releasing to atmospheric pressure to obtain beads;
2) preparation of foamed plastics
2.1) heating the obtained EPP heat-resistant beads by using water vapor to achieve the effect of primary expansion;
2.2) pressing, namely sequentially pre-pressing, pressurizing, decompressing and constant-pressure treating the EPP heat-resistant beads treated in the step 4.1);
2.3) sending the EPP heat-resistant beads subjected to constant pressure treatment into a mould for molding and processing;
2.4) demolding, and opening the mold to obtain the foamed plastic;
3) preparation of the hardened coating
Adding urethane acrylate, methyl methacrylate, isobornyl acrylate, butyl acrylate, nano silicon dioxide, a photoinitiator and an organic solvent into a stirring kettle according to a ratio, stirring at the normal temperature at the rotating speed of 3000-4000 rpm for 15-20 minutes, and standing after stirring is finished to obtain the hardened coating;
4) spraying of paint
Spraying the hardened coating obtained in the step 3) to the foamed plastic obtained in the step 2) in a spraying chamber to form a hardened coating, drying and standing;
5) assembling the foamed plastic obtained in the step 4) to form the foamed packing box of the EPP heat-resistant bead with high surface hardening strength.
The invention has the beneficial effects that:
the foam packing box is formed by assembling foam plastics made of EPP heat-resistant beads, the EPP heat-resistant beads are reasonable in component composition, the used raw materials are green and environment-friendly, and the hardened coating is sprayed, so that the surface of the finished product EPP beads has high hardness and light weight, the production and preparation cost is low, and the economic benefit is good.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The invention relates to a foam packing case of EPP heat-resistant beads with high surface hardening strength, which is formed by assembling foamed plastics made of EPP heat-resistant beads, wherein the EPP heat-resistant beads comprise the following components in parts by weight: polypropylene resin: 30-40 parts of micron silicon dioxide: 15-25 parts of foaming agent: 1-5 parts of a nucleating agent: 1-5 parts of a flame retardant: 1-5 parts of a coupling agent: 1-5 parts; the surface of the foam plastic is coated with a hardening coating, and the hardening coating comprises the following components in parts by weight: urethane acrylate: 30-40 parts of methyl methacrylate: 15-25 parts of isobornyl acrylate: 10-15 parts of butyl acrylate: 10-15 parts of nano silicon dioxide: 5-10 parts of a photoinitiator: 1-5 parts of an organic solvent: 60-70 parts.
Further, the polypropylene resin is high melt strength polypropylene.
Further, the foaming agent is aluminum oxide or barium sulfate.
Further, the nucleating agent is calcium stearate, talcum powder or bentonite.
Further, the flame retardant is magnesium hydroxide or aluminum hydroxide.
Further, the coupling agent is a titanate coupling agent.
Further, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone or 2-hydroxy-methylphenyl propane-1-ketone.
Further, the organic solvent is isopropanol or butanone.
Meanwhile, the invention also provides a preparation method of the foam packing box of the EPP heat-resistant bead with high surface hardening strength, which comprises the following steps:
1) preparation of beads
1.1) feeding polypropylene resin, micron silicon dioxide, a foaming agent, a nucleating agent, a flame retardant and a coupling agent into a stirrer according to a ratio, heating to 100-150 ℃, stirring and mixing for 10-15 minutes at a rotating speed of 3000-4000 revolutions per minute, and feeding into a double-screw extruder for melt extrusion granulation to obtain master batches after mixing;
1.2) feeding the master batch obtained in the step 1.1) into a foaming kettle, heating to 150-200 ℃, boosting to 4-5 MPa, and then instantly releasing to atmospheric pressure to obtain beads;
2) preparation of foamed plastics
2.1) heating the obtained EPP heat-resistant beads by using water vapor to achieve the effect of primary expansion;
2.2) pressing, namely sequentially pre-pressing, pressurizing, decompressing and constant-pressure treating the EPP heat-resistant beads treated in the step 4.1);
2.3) sending the EPP heat-resistant beads subjected to constant pressure treatment into a mould for molding and processing;
2.4) demolding, and opening the mold to obtain the foamed plastic;
3) preparation of the hardened coating
Adding urethane acrylate, methyl methacrylate, isobornyl acrylate, butyl acrylate, nano silicon dioxide, a photoinitiator and an organic solvent into a stirring kettle according to a ratio, stirring at the normal temperature at the rotating speed of 3000-4000 rpm for 15-20 minutes, and standing after stirring is finished to obtain the hardened coating;
4) spraying of paint
Spraying the hardened coating obtained in the step 3) to the foamed plastic obtained in the step 2) in a spraying chamber to form a hardened coating, drying and standing;
5) assembling the foamed plastic obtained in the step 4) to form the foamed packing box of the EPP heat-resistant bead with high surface hardening strength.
The foam packing box of the EPP heat-resistant beads with high surface hardening strength is formed by assembling foamed plastics made of the EPP heat-resistant beads, the EPP heat-resistant beads are reasonable in component composition, used raw materials are green and environment-friendly, and the hardened coating is sprayed, so that the surface of the finished product EPP beads has high hardness and light weight, the production and preparation cost is low, and the economic benefit is good.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention.
Claims (9)
1. A foam packing case of EPP heat-resistant beads with high surface hardening strength is characterized in that the EPP is formed by assembling foamed plastics made of EPP heat-resistant beads, and the EPP heat-resistant beads comprise the following components in parts by weight: polypropylene resin: 30-40 parts of micron silicon dioxide: 15-25 parts of foaming agent: 1-5 parts of a nucleating agent: 1-5 parts of a flame retardant: 1-5 parts of a coupling agent: 1-5 parts;
the surface of the foam plastic is coated with a hardening coating, and the hardening coating comprises the following components in parts by weight: urethane acrylate: 30-40 parts of methyl methacrylate: 15-25 parts of isobornyl acrylate: 10-15 parts of butyl acrylate: 10-15 parts of nano silicon dioxide: 5-10 parts of a photoinitiator: 1-5 parts of an organic solvent: 60-70 parts.
2. The foam packing case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the polypropylene resin is high melt strength polypropylene.
3. The foam packing case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the foaming agent is alumina or barium sulfate.
4. The foam packing case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the nucleating agent is calcium stearate, talc or bentonite.
5. The foam packing case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the flame retardant is magnesium hydroxide or aluminum hydroxide.
6. The foam packaging case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the coupling agent is titanate coupling agent.
7. The foam packing case of high case hardening strength EPP heat resistant beads according to claim 1, wherein the photoinitiator is 1-hydroxycyclohexyl phenyl ketone or 2-hydroxy-methylphenyl propane-1-one.
8. The foam packing case of high case hardening strength EPP heat-resistant beads according to claim 1, wherein the organic solvent is isopropyl alcohol or methyl ethyl ketone.
9. A preparation method of the foam packing case of the EPP heat-resistant bead with high surface hardening strength according to any one of claims 1 to 8, characterized by comprising the following steps:
1) preparation of beads
1.1) feeding polypropylene resin, micron silicon dioxide, a foaming agent, a nucleating agent, a flame retardant and a coupling agent into a stirrer according to a ratio, heating to 100-150 ℃, stirring and mixing for 10-15 minutes at a rotating speed of 3000-4000 revolutions per minute, and feeding into a double-screw extruder for melt extrusion granulation to obtain master batches after mixing;
1.2) feeding the master batch obtained in the step 1.1) into a foaming kettle, heating to 150-200 ℃, boosting to 4-5 MPa, and then instantly releasing to atmospheric pressure to obtain beads;
2) preparation of foamed plastics
2.1) heating the obtained EPP heat-resistant beads by using water vapor to achieve the effect of primary expansion;
2.2) pressing, namely sequentially pre-pressing, pressurizing, decompressing and constant-pressure treating the EPP heat-resistant beads treated in the step 4.1);
2.3) sending the EPP heat-resistant beads subjected to constant pressure treatment into a mould for molding and processing;
2.4) demolding, and opening the mold to obtain the foamed plastic;
3) preparation of the hardened coating
Adding urethane acrylate, methyl methacrylate, isobornyl acrylate, butyl acrylate, nano silicon dioxide, a photoinitiator and an organic solvent into a stirring kettle according to a ratio, stirring at the normal temperature at the rotating speed of 3000-4000 rpm for 15-20 minutes, and standing after stirring is finished to obtain the hardened coating;
4) spraying of paint
Spraying the hardened coating obtained in the step 3) to the foamed plastic obtained in the step 2) in a spraying chamber to form a hardened coating, drying and standing;
5) assembling the foamed plastic obtained in the step 4) to form the foamed packing box of the EPP heat-resistant bead with high surface hardening strength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011578101.9A CN112608511A (en) | 2020-12-28 | 2020-12-28 | Foam packing box of EPP heat-resistant beads with high surface hardening strength and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011578101.9A CN112608511A (en) | 2020-12-28 | 2020-12-28 | Foam packing box of EPP heat-resistant beads with high surface hardening strength and preparation method thereof |
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| CN112608511A true CN112608511A (en) | 2021-04-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679227A (en) * | 2018-12-31 | 2019-04-26 | 无锡会通轻质材料股份有限公司 | It is a kind of can rapid shaping EPP bead preparation method |
| CN109810625A (en) * | 2018-11-28 | 2019-05-28 | 湖南阳光新材料有限公司 | A kind of frosting cure process ultraviolet-curing paint and preparation method thereof |
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- 2020-12-28 CN CN202011578101.9A patent/CN112608511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810625A (en) * | 2018-11-28 | 2019-05-28 | 湖南阳光新材料有限公司 | A kind of frosting cure process ultraviolet-curing paint and preparation method thereof |
| CN109679227A (en) * | 2018-12-31 | 2019-04-26 | 无锡会通轻质材料股份有限公司 | It is a kind of can rapid shaping EPP bead preparation method |
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Application publication date: 20210406 |