CN112592535A - PP sheet for combined cabinet and preparation method thereof - Google Patents
PP sheet for combined cabinet and preparation method thereof Download PDFInfo
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- CN112592535A CN112592535A CN202011396670.1A CN202011396670A CN112592535A CN 112592535 A CN112592535 A CN 112592535A CN 202011396670 A CN202011396670 A CN 202011396670A CN 112592535 A CN112592535 A CN 112592535A
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- 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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- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a PP sheet for a combination cabinet and a preparation method thereof, wherein the preparation raw materials comprise the following components in parts by weight: 240-265 parts of polypropylene, 110-130 parts of polyethylene, 20-30 parts of poe and 20-35 parts of a filler; the filler accounts for 5.0-7.7% of the total preparation raw materials, the filler is heavy calcium carbonate which is used for replacing expensive white pigment so as to reduce the production cost, the heavy calcium carbonate is used as the filler so that the sheet can have higher tensile strength, the sheet can be kept in a tensioning state for a long time when being applied to a combination cabinet, and the performances of the finally prepared product in various aspects such as toughness, wear resistance, fire resistance and the like are greatly improved; the polypropylene is preferably polypropylene K1008, so that the raw materials have excellent fluidity and processability after being mixed; the polyethylene is preferably linear low density polyethylene dnda-7144, which improves the rupture strength and environmental stress crack resistance of the final product.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a pp sheet for a combination cabinet and a preparation method thereof.
Background
The combined cabinet is a product which is popular in the lives of the public nowadays, the combined cabinet is generally formed by connecting a pp sheet and a metal framework, and the pp sheet has high transparency, good barrier property, low density, no toxicity and sanitation, can be recycled, and is a novel green and environment-friendly material. The existing pp sheet has weak tensile strength, cannot be in a long-term tensioning state when being applied to a combined cabinet, and has poor surface flatness, thereby influencing the quality of the final combined cabinet.
Chinese patent application No. CN202010545228.4 discloses a PP sheet and a preparation method thereof, the main raw materials of which include leftover materials, polypropylene resin, polypropylene and polyethylene, and the PP sheet produced therefrom has poor tensile strength and cold resistance.
Disclosure of Invention
The invention aims to provide a pp sheet for a combination cabinet and a preparation method thereof, so that the finally prepared pp sheet has good tensile strength and flatness to meet the performance requirements of the combination cabinet for the pp sheet.
The preparation raw materials comprise the following components in parts by weight: 240-265 parts of polypropylene, 110-130 parts of polyethylene, 20-30 parts of poe and 20-35 parts of a filler.
The preparation method comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min; b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃; c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm; d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
Further, the poe accounts for 4.7-6.9% of the total raw material by weight, and the poe is preferably 8450 ethylene-butene copolymer or ethylene-octene copolymer.
Furthermore, the weight of the filler accounts for 5.0-7.7% of the total raw materials, and the filler is heavy calcium carbonate.
Further, the polypropylene is preferably polypropylene K1008.
Further, the polyethylene is preferably linear low density polyethylene dnda-7144.
Gain effect of the invention
The pp sheet material has good flatness and toughness, the filler adopts heavy calcium carbonate which can be used for replacing expensive white pigment so as to reduce the production cost, and the sheet material has higher tensile strength and cold resistance, so that the sheet material can keep a tensioning state for a long time when being applied to a combination cabinet; the polypropylene is preferably polypropylene K1008, so that the overall flowability and processability of the raw materials can be improved; the polyethylene is preferably linear low density polyethylene dnda-7144, which improves the burst strength of the final product.
Detailed Description
The invention is further described with reference to specific embodiments,
example one
The preparation raw materials are as follows by weight: 240 parts of polypropylene, 110 parts of polyethylene, 20 parts of poe and 20 parts of ground calcium carbonate.
The preparation of the sheet comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min;
b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃;
c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm;
d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
The PP sheet prepared by the preferred scheme has good toughness, and the filler is heavy calcium carbonate, and the whiteness of the filler is more than 90 percent, so that the filler can be used for replacing expensive white pigment to reduce the production cost; poe doped in the raw material is preferably 8450 ethylene-butylene copolymer, which can improve the melt index of the system in the processing process, so that the raw material has better fluidity and can improve the heat aging resistance and weather resistance of the sheet.
Example two
The preparation raw materials are as follows by weight: 265 parts of polypropylene, 130 parts of polyethylene, 30 parts of poe parts of heavy calcium carbonate and 35 parts of calcium carbonate.
The preparation of the sheet comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min;
b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃;
c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm;
d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
According to the formula provided by the embodiment, the weight of the raw materials is poe weight percent which accounts for 6.5 percent of the total weight of the raw materials, so that the PP sheet material has better cold resistance, can bear the low temperature of-65 ℃, and avoids the sheet material from cracking caused by the low temperature in the transportation process.
EXAMPLE III
The preparation raw materials are as follows by weight: 250 parts of polypropylene, 120 parts of polyethylene, 25 parts of poe and 25 parts of ground calcium carbonate.
The preparation of the sheet comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min;
b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃;
c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm;
d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
The weight content of poe is reduced, the production cost is reduced, compared with the technical scheme provided by the embodiment I, the pp sheet prepared by the embodiment has better cold resistance.
Example four
The preparation raw materials comprise 250 parts of polypropylene, 125 parts of polyethylene, 30 parts of poe and 30 parts of ground calcium carbonate in parts by weight, wherein poe is preferably an ethylene-octene copolymer.
The preparation of the sheet comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min;
b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃;
c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm;
d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
Poe in this example is preferably ethylene-octene copolymer, which is cheaper than the ethylene-butene copolymer used in examples one, two and three, thus greatly saving production cost and satisfying the hot-forming processability required for production.
Conclusion analysis:
performance parameters of the prior art:
light transmittance: 90 percent; heat distortion temperature: 102.8 ℃; the tensile strength is 72.8 Mpa; low temperature resistance: -30 ℃;
example one performance parameter:
light transmittance: 80 percent; heat distortion temperature: 120.8 ℃; the tensile strength is 90.6 Mpa; low temperature resistance: -40 ℃;
example two performance parameters:
light transmittance: 73 percent; heat distortion temperature: 120.8 ℃; the tensile strength is 96.6 Mpa; low temperature resistance: -65 ℃;
example three performance parameters:
light transmittance: 66 percent; heat distortion temperature: 140.8 ℃; the tensile strength is 120.3 Mpa; low temperature resistance: -70 ℃;
example four performance parameters:
light transmittance: 68 percent; heat distortion temperature: 140.8 ℃; the tensile strength is 113.3 Mpa; low temperature resistance: -68 ℃;
the foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The invention is not limited to the above embodiments, but rather various modifications are possible within the scope of the invention, which is defined by the scope of the independent claims.
Claims (6)
1. A pp sheet for a combination sideboard, comprising:
the preparation raw materials comprise the following components in parts by weight: 240-265 parts of polypropylene, 110-130 parts of polyethylene, 20-30 parts of poe and 20-35 parts of a filler.
2. A preparation method of a pp sheet for a combination sideboard is characterized by comprising the following steps:
the preparation process comprises the following steps:
a. feeding: weighing the components in parts by weight, putting the components into a stirrer, and stirring and mixing for 10 min;
b. extruding: feeding the stirred and mixed materials into a screw extruder, exhausting the materials in the screw extruder, wherein the temperature of each section in the screw extruder is 190 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and 260 ℃, the exhausted molten materials are conveyed to a die head, and the pressure in the die head is 60 Mpa; extruding through a die head to obtain a pp sheet primary finished product, wherein the temperature of extrusion molding of the material is 230-240 ℃;
c. shaping: cooling, shaping and calendaring the pp sheet primary finished product by using a three-roller calendaring machine, wherein the linear speeds of a lower roller, a middle roller and an upper roller of the three-roller calendaring machine are 14-15 m/min, and the thickness of the pp sheet material band finished by calendaring by the three-roller calendaring machine is 0.2-0.4 mm;
d. cutting: and cutting the prepared pp sheet material belt by a size cutting machine and then manually collecting.
3. The pp sheet for a combination sideboard of claim 1, wherein: the poe accounts for 4.7-6.9% of the total raw material, and the poe is preferably 8450 ethylene-butene copolymer or ethylene-octene copolymer.
4. The pp sheet for a combination sideboard of claim 1, wherein: the weight of the filler accounts for 5.0-7.7% of the total raw materials, and the filler is heavy calcium carbonate.
5. The pp sheet for a combination sideboard of claim 1, wherein: the polypropylene is preferably polypropylene K1008.
6. The pp sheet for a combination sideboard of claim 1, wherein: the polyethylene is preferably linear low density polyethylene dnda-7144.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396670.1A CN112592535A (en) | 2020-12-03 | 2020-12-03 | PP sheet for combined cabinet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396670.1A CN112592535A (en) | 2020-12-03 | 2020-12-03 | PP sheet for combined cabinet and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112592535A true CN112592535A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011396670.1A Pending CN112592535A (en) | 2020-12-03 | 2020-12-03 | PP sheet for combined cabinet and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002186A (en) * | 2010-11-02 | 2011-04-06 | 苏州旭光聚合物有限公司 | Mineral filled low-shrinkage modified polypropylene composite material and preparation method thereof |
| CN102241855A (en) * | 2010-05-14 | 2011-11-16 | 常熟市江顺塑料制品有限公司 | Foamed material prepared from nano-calcium-carbonate-filled polypropylene/polyethylene blend and preparation process thereof |
| CN102391582A (en) * | 2011-10-17 | 2012-03-28 | 常熟市星源金属涂层厂 | Molecular sieve filling composite material prepared by blending polypropylene and polyethylene and preparation method of composite material |
| CN102993556A (en) * | 2012-09-26 | 2013-03-27 | 天津金发新材料有限公司 | Polypropylene composition, and preparation method and application thereof |
| CN106003939A (en) * | 2016-07-05 | 2016-10-12 | 丹东鑫马高科技塑料包装有限公司 | Composite plastic sheet and making method thereof |
| CN106633412A (en) * | 2015-11-02 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | High-elongation-at-break polypropylene composition and preparation method thereof |
-
2020
- 2020-12-03 CN CN202011396670.1A patent/CN112592535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241855A (en) * | 2010-05-14 | 2011-11-16 | 常熟市江顺塑料制品有限公司 | Foamed material prepared from nano-calcium-carbonate-filled polypropylene/polyethylene blend and preparation process thereof |
| CN102002186A (en) * | 2010-11-02 | 2011-04-06 | 苏州旭光聚合物有限公司 | Mineral filled low-shrinkage modified polypropylene composite material and preparation method thereof |
| CN102391582A (en) * | 2011-10-17 | 2012-03-28 | 常熟市星源金属涂层厂 | Molecular sieve filling composite material prepared by blending polypropylene and polyethylene and preparation method of composite material |
| CN102993556A (en) * | 2012-09-26 | 2013-03-27 | 天津金发新材料有限公司 | Polypropylene composition, and preparation method and application thereof |
| CN106633412A (en) * | 2015-11-02 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | High-elongation-at-break polypropylene composition and preparation method thereof |
| CN106003939A (en) * | 2016-07-05 | 2016-10-12 | 丹东鑫马高科技塑料包装有限公司 | Composite plastic sheet and making method thereof |
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Application publication date: 20210402 |