CN110591305A - High-flexibility plastic steel inner guard plate for steel coil protective packaging and preparation method thereof - Google Patents
High-flexibility plastic steel inner guard plate for steel coil protective packaging and preparation method thereof Download PDFInfo
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- CN110591305A CN110591305A CN201910911909.5A CN201910911909A CN110591305A CN 110591305 A CN110591305 A CN 110591305A CN 201910911909 A CN201910911909 A CN 201910911909A CN 110591305 A CN110591305 A CN 110591305A
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- guard plate
- glycidyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a high-flexibility plastic steel inner guard plate for steel coil protective packaging, which comprises the following raw materials in parts by weight: 100 parts of PET polyester, 5-25 parts of a toughening agent, 0.1-2 parts of a chain extender, 0.5-1.5 parts of an antioxidant and 0.5-1.5 parts of a hydrolysis resistant agent; in addition, the invention also discloses a method for preparing the inner guard plate, which comprises the following steps: 1) drying the PET polyester; 2) putting the dried PET polyester, the toughening agent and the hydrolysis resistant agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at a low speed for 5 to 7 minutes at normal temperature until the raw materials are uniformly mixed to obtain a mixture; 3) discharging the mixture, adding the mixture into a feeding trough of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under a vacuum condition. The inner guard plate obtained by the invention has good mechanical property, and the product has good rigidity and good flexibility, and can meet the use requirement of the inner guard plate in the steel coil package.
Description
Technical Field
The invention belongs to the technical field of packaging materials, and particularly relates to a high-flexibility plastic steel inner guard plate for steel coil protective packaging and a preparation method thereof.
Background
High-quality steel coils such as metallurgical tin-plated thin plates, galvanized plates, cold-rolled plates, color-coated plates, silicon steel plates and the like are easily damaged by impact in the transportation process, so that the quality of the whole coil of coils is influenced, and the front protection of the coils is particularly important. The inner guard plate for the front protection package of the existing steel coil is mainly made of polyethylene plastics, and the polyethylene inner guard plate has the defects of low bending strength (generally below 15 MPa), insufficient rigidity, poor flexibility and the like.
Disclosure of Invention
The invention aims to overcome one of the defects in the prior art and provides a high-flexibility plastic steel inner guard plate for steel coil protective packaging, which comprises the following raw materials in parts by weight:
the intrinsic viscosity value of the PET polyester is 0.65-1.6 dl/g,
the toughening agent is at least one of ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA) and ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA).
Further, the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate.
Further, the chain extender is at least one of 2,2 ' -bis (2-oxazoline), 1, 3-phenylene-bis (2-oxazoline), 4 ' -methylenebis (2-methyl-6-ethyl) aniline and 4,4 ' -diphenylmethane diisocyanate.
Further, the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
Furthermore, the grafting ratio of the glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, the ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), the glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA) and the ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA) is 0.5 to 2.0 percent.
In addition, the invention also discloses a method for preparing the high-flexibility plastic steel inner guard plate for the steel coil protective package, which comprises the following steps:
1) drying the PET polyester in an oven to a water content of less than 0.05%;
2) putting the dried PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring at a low speed for 5-7 minutes at normal temperature until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under a vacuum condition, wherein the temperature of each section of the screw is as follows: the feeding section is 235-245 ℃, the conveying section is 250-255 ℃, the melting section is 260-275 ℃, and the machine head is 255-270 ℃.
Further, the drying temperature in the step 1) is 110-120 ℃, and the drying time is 4-6 hours.
Further, the rotating speed of the low-speed stirring in the step 2) is 60-90 revolutions per minute.
Further, the vacuum condition in the step 3) is 300-1000 Pa.
The toughening agent is adopted to improve the impact resistance of the inner guard plate, the chain extender is favorable for improving the mechanical property of the inner guard plate, and the hydrolysis resistance agent is favorable for improving the mechanical property of the inner guard plate and the adaptability to harsh environments such as moisture resistance, acid and alkali resistance and the like; the inner guard plate obtained by the invention has good mechanical property, the bending strength is more than 30MPa, and the impact strength of the simple beam gap is more than 20KJ/m2The product has better rigidity and flexibility, can meet the use requirement of the inner guard plate of the steel coil package, and has remarkable economic benefit and social benefit.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1:
the utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging, counts according to parts by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 1.2dl/g,
the toughening agent is an ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, the grafting rate of glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer is 2.0 percent,
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate,
the chain extender is 4, 4' -diphenylmethane diisocyanate,
the hydrolysis resisting agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
A method for preparing a high-flexibility plastic steel inner guard plate for steel coil protective packaging comprises the following steps:
1) drying the PET polyester in an oven until the water content is lower than 0.05 percent, the drying temperature is 110 ℃, and the drying time is 6 hours;
2) selecting the total weight of PET polyester, a flexibilizer, a chain extender, an antioxidant and an anti-hydrolysis agent according to the proportion of the embodiment, wherein the total weight of the ingredients is 150 kg;
3) putting the PET polyester, the toughening agent and the hydrolysis resistant agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at normal temperature at a low speed of 80 revolutions per minute for 6 minutes until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under the vacuum condition of 300Pa, wherein the temperature of each section of the screw is as follows: the charging section is 240 ℃, the conveying section is 250 ℃, the melting section is 265 ℃ and the machine head is 265 ℃.
Example 2:
the utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging, counts according to parts by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 0.65dl/g,
the toughening agent comprises 5 parts of ethylene-n-butyl acrylate-glycidyl methacrylate copolymer and 10 parts of ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), the grafting ratio of glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer is 1.5%, the grafting ratio of glycidyl methacrylate in the ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA) is 0.5%,
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate,
the chain extender is 0.5 part of 1, 3-phenylene-bis (2-oxazoline) and 1.5 parts of 4, 4' -methylene bis (2-methyl-6-ethyl) aniline,
the hydrolysis resisting agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
A method for preparing a high-flexibility plastic steel inner guard plate for steel coil protective packaging comprises the following steps:
1) drying the PET polyester in an oven until the water content is lower than 0.05 percent, the drying temperature is 120 ℃, and the drying time is 5 hours;
2) selecting the total weight of PET polyester, a flexibilizer, a chain extender, an antioxidant and an anti-hydrolysis agent according to the proportion of the embodiment, wherein the total weight of the ingredients is 150 kg;
3) putting the PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at normal temperature at a low speed of 80 revolutions per minute for 7 minutes until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under the vacuum condition of 500Pa, wherein the temperature of each section of the screw is as follows: the feeding section is 235 ℃, the conveying section is 255 ℃, the melting section is 260 ℃ and the head is 255 ℃.
Example 3:
the utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging, counts according to parts by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 1.6dl/g,
the toughening agent is an ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, the grafting rate of glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer is 1.5 percent,
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate,
the chain extender is 4, 4' -methylene bis (2-methyl-6-ethyl) aniline,
the hydrolysis resisting agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
A method for preparing a high-flexibility plastic steel inner guard plate for steel coil protective packaging comprises the following steps:
1) drying the PET polyester in an oven until the water content is lower than 0.05 percent, the drying temperature is 115 ℃, and the drying time is 5 hours;
2) selecting the total weight of PET polyester, a flexibilizer, a chain extender, an antioxidant and an anti-hydrolysis agent according to the proportion of the embodiment, wherein the total weight of the ingredients is 150 kg;
3) putting the PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at normal temperature at a low speed of 90 revolutions per minute for 5 minutes until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under the vacuum condition of 800Pa, wherein the temperature of each section of the screw is as follows: the feeding section is 245 ℃, the conveying section is 255 ℃, the melting section is 275 ℃ and the head is 270 ℃.
Example 4:
the utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging, counts according to parts by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 0.8dl/g,
the toughening agent is 10 parts of glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA) and 15 parts of ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA), the grafting rate of glycidyl methacrylate in the glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA) and the ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA) is 1 percent,
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate,
the chain extender is 1, 3-phenylene-bis (2-oxazoline),
the hydrolysis resisting agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
A method for preparing a high-flexibility plastic steel inner guard plate for steel coil protective packaging comprises the following steps:
1) drying the PET polyester in an oven until the water content is lower than 0.05 percent, the drying temperature is 120 ℃, and the drying time is 5 hours;
2) selecting the total weight of PET polyester, a flexibilizer, a chain extender, an antioxidant and an anti-hydrolysis agent according to the proportion of the embodiment, wherein the total weight of the ingredients is 150 kg;
3) putting the PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at normal temperature at a low speed of 70 r/min for 7 minutes until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under the vacuum condition of 700Pa, wherein the temperature of each section of the screw is as follows: the feeding section is 235 ℃, the conveying section is 250 ℃, the melting section is 260 ℃ and the head is 260 ℃.
Example 5:
the utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging, counts according to parts by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 0.65dl/g,
the toughening agent is 10 parts of ethylene-n-butyl acrylate-glycidyl methacrylate copolymer and 10 parts of ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), the grafting rate of glycidyl methacrylate in the ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA) is 1.5 percent, the grafting rate of glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer is 1 percent,
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate,
the chain extender is 0.5 part of 1, 3-phenylene-bis (2-oxazoline) and 1.5 parts of 4, 4' -methylene bis (2-methyl-6-ethyl) aniline,
the hydrolysis resisting agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
A method for preparing a high-flexibility plastic steel inner guard plate for steel coil protective packaging comprises the following steps:
1) drying the PET polyester in an oven until the water content is lower than 0.05 percent, the drying temperature is 120 ℃, and the drying time is 4 hours;
2) selecting the total weight of PET polyester, a flexibilizer, a chain extender, an antioxidant and an anti-hydrolysis agent according to the proportion of the embodiment, wherein the total weight of the ingredients is 150 kg;
3) putting the PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring the mixture at normal temperature at a low speed of 60 revolutions per minute for 7 minutes until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under the vacuum condition of 1000Pa, wherein the temperature of each section of the screw is as follows: the feeding section is 245 ℃, the conveying section is 255 ℃, the melting section is 275 ℃ and the head is 270 ℃.
The inner sheathing panels prepared in the above examples 1 to 5 were subjected to mechanical property tests, and the test results are shown in the following table 1:
as can be seen from table 1, the bending strength, the elongation at break, and the notch strength of the simply supported beam are relatively high, which indicates that the inner sheathing of the present invention has relatively good rigidity and flexibility.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a coil of strip is high pliability plastic steel inner guard plate for protective packaging which characterized in that, by weight, its raw materials composition includes:
the intrinsic viscosity value of the PET polyester is 0.65-1.6 dl/g,
the toughening agent is at least one of ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA) and ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA).
2. The steel coil protective packaging high-flexibility plastic steel inner protective plate as claimed in claim 1, wherein the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate.
3. The inner plastic steel guard plate for the steel coil protective packaging as claimed in claim 1, wherein the chain extender is at least one of 2,2 ' -bis (2-oxazoline), 1, 3-phenylene-bis (2-oxazoline), 4 ' -methylenebis (2-methyl-6-ethyl) aniline, and 4,4 ' -diphenylmethane diisocyanate.
4. The inner plastic steel guard plate for the steel coil protective packaging as claimed in claim 1, wherein the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide.
5. The inner plastic steel guard plate for the steel coil protective packaging as claimed in claim 1, wherein the grafting ratio of the glycidyl methacrylate in the ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, the ethylene propylene diene monomer-glycidyl methacrylate copolymer (EPDM-g-GMA), the glycidyl methacrylate grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS-g-GMA), and the ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA) is 0.5-2.0%.
6. A method for preparing the high-flexibility plastic steel inner guard plate for the steel coil protective packaging of any one of claims 1 to 5 is characterized by comprising the following steps:
1) drying the PET polyester in an oven to a water content of less than 0.05%;
2) putting the dried PET polyester, the toughening agent and the hydrolysis resisting agent into a high-speed mixer for mixing, then putting the chain extender and finally the antioxidant into the mixer, and stirring at a low speed for 5-7 minutes at normal temperature until the raw materials are uniformly mixed to obtain a mixture;
3) discharging the mixture, adding the mixture into a feeding groove of a double-screw extruder, and carrying out melt extrusion molding through the double-screw extruder under a vacuum condition, wherein the temperature of each section of the screw is as follows: the feeding section is 235-245 ℃, the conveying section is 250-255 ℃, the melting section is 260-275 ℃, and the machine head is 255-270 ℃.
7. The method for preparing the high-flexibility plastic steel inner guard plate for the steel coil protective packaging according to claim 6, wherein the drying temperature in the step 1) is 110-120 ℃, and the drying time is 4-6 hours.
8. The method for preparing the high-flexibility plastic steel inner guard plate for the steel coil protective packaging according to claim 6, wherein the rotation speed of the low-speed stirring in the step 2) is 60-90 revolutions per minute.
9. The method for preparing the high-flexibility plastic steel inner guard plate for the steel coil protective packaging according to claim 6, wherein the vacuum condition in the step 3) is 300-1000 Pa.
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| CN201910911909.5A CN110591305A (en) | 2019-09-25 | 2019-09-25 | High-flexibility plastic steel inner guard plate for steel coil protective packaging and preparation method thereof |
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| CN201910911909.5A CN110591305A (en) | 2019-09-25 | 2019-09-25 | High-flexibility plastic steel inner guard plate for steel coil protective packaging and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111187492A (en) * | 2020-02-17 | 2020-05-22 | 深圳市绿环再生资源开发有限公司 | Treatment method of PET waste film doped with metal belt |
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Application publication date: 20191220 |