CN113429755A - Degradable PET packing belt with flame retardant effect - Google Patents
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Abstract
The invention belongs to the technical field of packing belt materials, in particular to a degradable PET packing belt with a flame retardant effect, which solves the problems of poor flame retardant property and degradation capability of PET and adverse environmental protection caused by large-scale use in the prior art, and comprises the following raw materials: 50-70 parts of degradable PET material, 20-30 parts of polylactic acid, 15-25 parts of straw fiber, 1-3 parts of flame retardant, 2-5 parts of ethylenediamine and 1-3 parts of methacrylic anhydride. The method comprises the steps of blending a flame retardant, ethylenediamine and straw fibers to prepare modified straw fibers, and blending and extruding a degradable PET material, polylactic acid, the modified straw fibers and methacrylic anhydride to prepare a required PET packing belt; the preparation method is simple, the preparation conditions are mild, and the obtained PET packing belt has good flame retardance, high safety, high tensile strength, bending resistance, heat resistance and corrosion resistance, and can be widely applied.
Description
Technical Field
The invention relates to the technical field of packing belt materials, in particular to a degradable PET packing belt with a flame-retardant effect.
Background
A plastic strapping band is a uniaxially oriented plastic strapping material. The seventies began to introduce into China. Because of its advantages of light weight, high strength, corrosion resistance and convenient use, it can replace the packing belt made of iron sheet and paper strip and can be developed quickly. With the development of the packaging industry, the demand of plastic packing belts is getting larger and larger, and the production of the plastic packing belts tends to increase by times.
PET (polyethylene terephthalate) is a linear thermoplastic resin and one of the most widely used engineering plastics, and has a density of (1.3-1.4) g/cm3The Intrinsic Viscosity (IV) is 0.62-1.20 ml/g, and the melting point is 245-. The PET plastic is transparent, has high glossiness, and has better weather resistance, chemical stability, impact resistance, creep resistance and dimensional stability; it has high heat resistance, can maintain excellent physical and mechanical performance in wide temperature range, and is high value resin. The PET packing belt is a polyester packing belt formed by extruding PET as a main raw material and performing unidirectional stretching, is the most popular novel environment-friendly packing material for replacing steel belts, steel wires and heavy PP packing belts internationally at present, and has the advantages that: (1) the steel belt has strong tensile resistance, is as good as steel belt, has impact-resistant ductility, and can ensure the transportation safety of products; (2) the elongation is small, the elongation is only one sixth of that of the polypropylene belt, and the tension can be kept for a long time; (3) the safety is good, the defect that the bundled objects are polluted by rusting of the steel belt is avoided, and the color is bright and can be identified; (4) the economic benefit is good, the length of 1 ton of PET packing belt is equivalent to the length of 6 ton of steel belt with the same specification, the single price per meter is lower than that of the steel belt by more than 40 percent, and the packing cost can be greatly reduced.
However, PET has poor degradation capability under natural conditions, and random discharge easily causes white pollution. In addition, pure PET is extremely flammable in air, with a limiting oxygen index value of only 21%. In the prior art, the PET flame retardance is mostly realized by adopting a flame retardant to treat the surface of a PET material. The addition of the pure flame retardant can improve the flame retardance of PET and simultaneously cause certain influence on the mechanical property and the degradation property of the PET. Chinese patent publication No. CN111004481A discloses a method for manufacturing a flame-retardant PET packing belt, which comprises the following steps: (1) mixing the auxiliary agent, 30-40% of PET resin and 25-50% of flame retardant, extruding and granulating to obtain functional master batch; (2) respectively drying the functional master batch and the rest of PET resin, uniformly mixing with the rest of flame retardant, feeding into an extruder, and extruding to obtain an extruded material; (3) and forming a material blank by the extruded material through a neck mold, and carrying out shaping cooling, heating stretching, cooling, size processing, rolling and packaging to obtain the flame-retardant PET packing belt material. According to the invention, by optimizing the processing temperature, the screw rotating speed, the output, the screw combination, the material dehumidification and drying and the technological parameters of the size finish machining of the packing belt, the mechanical property of the product is improved, the flame retardant property of the PET material can be greatly improved, the longitudinal toughness is improved, the size stability of the product is also greatly improved, the mechanical property of the material is protected, the secondary degradation is prevented, the performance of the material is lower, the material loss in the product production is reduced, the investment cost of equipment is reduced, and the consumption of hydroelectric resources is greatly reduced. But the obtained PET packing belt has poor degradability, and is not beneficial to environmental protection when being used in large quantity. Based on the statement, the invention provides a degradable PET packing belt with a flame-retardant effect.
Disclosure of Invention
The invention aims to solve the problems that PET in the prior art is poor in flame retardant property and degradation capability and is not beneficial to environmental protection when being used in large quantity, and provides a degradable PET packing belt with a flame retardant effect.
A degradable PET packing belt with a flame-retardant effect comprises the following raw materials in parts by weight: 50-70 parts of degradable PET material, 20-30 parts of polylactic acid, 15-25 parts of straw fiber, 1-3 parts of flame retardant, 2-5 parts of ethylenediamine and 1-3 parts of methacrylic anhydride.
Preferably, the degradable PET packing belt with the flame-retardant effect comprises the following raw materials in parts by weight: 55-65 parts of degradable PET material, 22-28 parts of polylactic acid, 18-22 parts of straw fiber, 1.5-2.5 parts of flame retardant, 3-4 parts of ethylenediamine and 1.5-2.5 parts of methacrylic anhydride.
Preferably, the degradable PET packing belt with the flame-retardant effect comprises the following raw materials in parts by weight: 60 parts of degradable PET material, 25 parts of polylactic acid, 20 parts of straw fiber, 2 parts of flame retardant, 3.5 parts of ethylenediamine and 2 parts of methacrylic anhydride.
Preferably, the degraded PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 140-180 ℃, adding a catalyst for prepolymerization reaction for 2-5h, heating to 210-230 ℃, adding cyclobutyl amine hydrochloride, and continuing the reaction until the reaction is complete to obtain the required degraded PET material.
Preferably, the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 30-40:80-100:1-3: 0.5-1.5.
Preferably, the catalyst is prepared by the following method: (1) putting the activated carbon into a sodium hydroxide solution with the concentration of 18-22%, performing ultrasonic dispersion for 8-15min, and filtering and drying to obtain pretreated activated carbon; (2) and adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and stirring and mixing uniformly to obtain the required catalyst.
Preferably, the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 11-15:3-7: 1-3.
Preferably, the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide in a mass ratio of 5-7: 1-2.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 50-70 parts of raw material degradable PET material, 20-30 parts of polylactic acid, 15-25 parts of straw fiber, 1-3 parts of flame retardant, 2-5 parts of ethylenediamine and 1-3 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 70-90 ℃ to obtain modified straw fibers;
and S3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding the mixture into a belt shape through a double-screw extruder.
Preferably, the mixing temperature in the step S3 is 160-.
The invention provides a degradable PET packing belt with a flame-retardant effect, which has the following beneficial effects:
1. the method comprises the steps of blending a flame retardant, ethylenediamine and straw fibers to prepare modified straw fibers, and blending and extruding a degradable PET material, polylactic acid, the modified straw fibers and methacrylic anhydride to prepare a required PET packing belt; the preparation method is simple, the preparation conditions are mild, and the obtained PET packing belt has good flame retardance, high safety, high tensile strength, bending resistance, heat resistance and corrosion resistance, and can be widely applied.
2. According to the invention, ammonium polyphosphate and molybdenum silicide are compounded to prepare the flame retardant, the flame retardant is used for modifying straw fibers under the action of ethylenediamine, the obtained modified straw fibers have good dispersibility, strong molecular surface binding force, good flame retardance and excellent mechanical properties, and finally the modified straw fibers are used for reinforcing PET, so that the performance influence caused by adding pure flame retardant is effectively solved.
3. According to the invention, the terephthalic acid and the ethylene glycol are subjected to prepolymerization reaction under the action of the catalyst, and then the cyclobutylamine hydrochloride is added to react completely to obtain the PET material to be degraded.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 50 parts of degradable PET material, 20 parts of polylactic acid, 15 parts of straw fiber, 1 part of flame retardant, 2 parts of ethylenediamine and 1 part of methacrylic anhydride;
the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 140 ℃, adding a catalyst for prepolymerization reaction for 2 hours, then heating to 210 ℃, adding cyclobutyl amine hydrochloride, and continuing to react until the reaction is complete to obtain the required degraded PET material, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 30:80:1: 0.5;
the catalyst is prepared by the following method: (1) putting the activated carbon into a sodium hydroxide solution with the concentration of 18%, ultrasonically dispersing for 8min, filtering and drying to obtain pretreated activated carbon; (2) adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and uniformly stirring and mixing to obtain the required catalyst, wherein the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 11:3: 1;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide in a mass ratio of 5:1.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 50 parts of raw material degradation PET material, 20 parts of polylactic acid, 15 parts of straw fiber, 1 part of flame retardant, 2 parts of ethylenediamine and 1 part of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 70 ℃ to obtain modified straw fibers;
s3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding to be ribbon-shaped through a double-screw extruder, wherein the mixing temperature in the step S3 is 160 ℃, and the extrusion temperature is 130 ℃.
Example two
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 55 parts of degradable PET material, 22 parts of polylactic acid, 18 parts of straw fiber, 1.5 parts of flame retardant, 3 parts of ethylenediamine and 1.5 parts of methacrylic anhydride;
the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 150 ℃, adding a catalyst for prepolymerization reaction for 3 hours, then heating to 215 ℃, adding cyclobutyl amine hydrochloride, and continuing to react until the reaction is complete to obtain the required degraded PET material, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 32:85:1.5: 1;
the catalyst is prepared by the following method: (1) putting the activated carbon into a 19% sodium hydroxide solution, performing ultrasonic dispersion for 10min, and filtering and drying to obtain pretreated activated carbon; (2) adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and uniformly stirring and mixing to obtain the required catalyst, wherein the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 12:4: 1;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide according to the mass ratio of 5.5: 1.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 55 parts of raw material degradable PET material, 22 parts of polylactic acid, 18 parts of straw fiber, 1.5 parts of flame retardant, 3 parts of ethylenediamine and 1.5 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 75 ℃ to obtain modified straw fibers;
s3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding to be ribbon-shaped through a double-screw extruder, wherein the mixing temperature in the step S3 is 165 ℃, and the extrusion temperature is 132 ℃.
EXAMPLE III
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 60 parts of degradable PET material, 25 parts of polylactic acid, 20 parts of straw fiber, 2 parts of flame retardant, 3.5 parts of ethylenediamine and 2 parts of methacrylic anhydride;
the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 160 ℃, adding a catalyst for prepolymerization reaction for 3.5 hours, then heating to 220 ℃, adding cyclobutyl amine hydrochloride, and continuing to react until the reaction is complete to obtain the required degraded PET material, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 35:90:2: 1;
the catalyst is prepared by the following method: (1) putting the activated carbon into a sodium hydroxide solution with the concentration of 20%, performing ultrasonic dispersion for 12min, and filtering and drying to obtain pretreated activated carbon; (2) adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and uniformly stirring and mixing to obtain the required catalyst, wherein the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 13:5: 2;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide according to the mass ratio of 6: 1.5.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 60 parts of raw material degradable PET material, 25 parts of polylactic acid, 20 parts of straw fiber, 2 parts of flame retardant, 3.5 parts of ethylenediamine and 2 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 80 ℃ to obtain modified straw fibers;
s3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding to be ribbon-shaped through a double-screw extruder, wherein the mixing temperature in the step S3 is 170 ℃, and the extrusion temperature is 135 ℃.
Example four
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 65 parts of degradable PET material, 28 parts of polylactic acid, 22 parts of straw fiber, 2.5 parts of flame retardant, 4 parts of ethylenediamine and 2.5 parts of methacrylic anhydride;
the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 170 ℃, adding a catalyst for prepolymerization reaction for 4 hours, then heating to 225 ℃, adding cyclobutyl amine hydrochloride, and continuing to react until the reaction is complete to obtain the required degraded PET material, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 38:95:1: 1.5;
the catalyst is prepared by the following method: (1) putting the activated carbon into a sodium hydroxide solution with the concentration of 18-22%, performing ultrasonic dispersion for 14min, and filtering and drying to obtain pretreated activated carbon; (2) adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and uniformly stirring and mixing to obtain the required catalyst, wherein the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 7:3: 3;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide according to the mass ratio of 6.5: 1.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 65 parts of raw material degradable PET material, 28 parts of polylactic acid, 22 parts of straw fiber, 2.5 parts of flame retardant, 4 parts of ethylenediamine and 2.5 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 85 ℃ to obtain modified straw fibers;
s3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding to be ribbon-shaped through a double-screw extruder, wherein the mixing temperature in the step S3 is 175 ℃, and the extrusion temperature is 138 ℃.
EXAMPLE five
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 70 parts of degradable PET material, 30 parts of polylactic acid, 25 parts of straw fiber, 3 parts of flame retardant, 5 parts of ethylenediamine and 3 parts of methacrylic anhydride;
the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 180 ℃, adding a catalyst for prepolymerization reaction for 5 hours, then heating to 230 ℃, adding cyclobutyl amine hydrochloride, and continuing to react until the reaction is complete to obtain the required degraded PET material, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 40:100:3: 1.5;
the catalyst is prepared by the following method: (1) putting the activated carbon into a 22% sodium hydroxide solution, ultrasonically dispersing for 15min, filtering and drying to obtain pretreated activated carbon; (2) adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and uniformly stirring and mixing to obtain the required catalyst, wherein the mass ratio of the pretreated activated carbon, the butyl titanate and the propyl dicyclohexyl ketone in the step (2) is 15:7: 3;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide according to the mass ratio of 7: 2.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 70 parts of raw material degradation PET material, 30 parts of polylactic acid, 25 parts of straw fiber, 3 parts of flame retardant, 5 parts of ethylenediamine and 3 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 90 ℃ to obtain modified straw fibers;
s3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding to be ribbon-shaped through a double-screw extruder, wherein the mixing temperature in the step S3 is 180 ℃, and the extruding temperature is 140 ℃.
Comparative example 1
The invention provides a degradable PET packing belt with a flame-retardant effect, which comprises the following raw materials in parts by weight: 50 parts of PET material, 20 parts of polylactic acid, 15 parts of straw fiber, 1 part of flame retardant, 2 parts of ethylenediamine and 1 part of methacrylic anhydride;
the flame retardant is prepared by compounding ammonium polyphosphate and molybdenum silicide in a mass ratio of 5:1.
The invention also provides a preparation method of the degradable PET packing belt with the flame retardant effect, which comprises the following steps:
s1, weighing 50 parts of an ET material, 20 parts of polylactic acid, 15 parts of straw fiber, 1 part of a flame retardant, 2 parts of ethylenediamine and 1 part of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 70 ℃ to obtain modified straw fibers;
s3, adding the PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding the mixture into a belt shape through a double-screw extruder, wherein the mixing temperature in the step S3 is 160 ℃, and the extrusion temperature is 130 ℃.
The PET strapping bands prepared in the first to fifth examples of the present invention and the first comparative example were respectively manufactured into a specification of 12.7mm in width and 0.6mm in thickness, and the performance of the strapping bands was measured to obtain the following results:
note: the self-extinguishing time refers to the extinguishing time after the packing belt is ignited and vertically burnt for 10s and leaves the fire source;
the degradability refers to the degradation rate of the packaging belt after 6 months of degradation according to the ASTM D5272-92 outdoor exposure test standard rule of photodegradable plastics.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The degradable PET packing belt with the flame-retardant effect is characterized by comprising the following raw materials in parts by weight: 50-70 parts of degradable PET material, 20-30 parts of polylactic acid, 15-25 parts of straw fiber, 1-3 parts of flame retardant, 2-5 parts of ethylenediamine and 1-3 parts of methacrylic anhydride.
2. The degradable PET packing belt with the flame retardant effect according to claim 1 is characterized by comprising the following raw materials in parts by weight: 55-65 parts of degradable PET material, 22-28 parts of polylactic acid, 18-22 parts of straw fiber, 1.5-2.5 parts of flame retardant, 3-4 parts of ethylenediamine and 1.5-2.5 parts of methacrylic anhydride.
3. The degradable PET packing belt with the flame retardant effect according to claim 1 is characterized by comprising the following raw materials in parts by weight: 60 parts of degradable PET material, 25 parts of polylactic acid, 20 parts of straw fiber, 2 parts of flame retardant, 3.5 parts of ethylenediamine and 2 parts of methacrylic anhydride.
4. The degradable PET strapping tape with flame retardant effect of claim 1, wherein the degradable PET material is prepared by the following method: under the vacuum condition, adding terephthalic acid and ethylene glycol into a prepolymerization reactor together, heating to 140-180 ℃, adding a catalyst for prepolymerization reaction for 2-5h, heating to 210-230 ℃, adding cyclobutyl amine hydrochloride, and continuing the reaction until the reaction is complete to obtain the required degraded PET material.
5. The degradable PET strapping tape with the flame retardant effect of claim 4, wherein the mass ratio of the terephthalic acid to the ethylene glycol to the catalyst to the cyclobutyl amine hydrochloride is 30-40:80-100:1-3: 0.5-1.5.
6. The degradable PET strapping tape with flame retardant effect of claim 4, wherein the catalyst is prepared by the following method: (1) putting the activated carbon into a sodium hydroxide solution with the concentration of 18-22%, performing ultrasonic dispersion for 8-15min, and filtering and drying to obtain pretreated activated carbon; (2) and adding the pretreated activated carbon, butyl titanate and propyl dicyclohexyl ketone into a stirrer together, and stirring and mixing uniformly to obtain the required catalyst.
7. The degradable PET strapping tape with the flame retardant effect of claim 6, wherein the mass ratio of the pretreated activated carbon in the step (2) to the butyl titanate to the propyldicyclohexyl ketone is 11-15:3-7: 1-3.
8. The degradable PET packing belt with the flame retardant effect according to claim 1, characterized in that the flame retardant is obtained by compounding ammonium polyphosphate and molybdenum silicide in a mass ratio of 5-7: 1-2.
9. The preparation method of the degradable PET strapping tape with flame retardant effect according to any one of claims 1 to 8, characterized by comprising the following steps:
s1, weighing 50-70 parts of raw material degradable PET material, 20-30 parts of polylactic acid, 15-25 parts of straw fiber, 1-3 parts of flame retardant, 2-5 parts of ethylenediamine and 1-3 parts of methacrylic anhydride for later use;
s2, adding the flame retardant, the ethylenediamine and the straw fibers into a stirrer together, and stirring and mixing uniformly at the temperature of 70-90 ℃ to obtain modified straw fibers;
and S3, adding the degraded PET material, the polylactic acid, the modified straw fiber and the methacrylic anhydride into a high-speed mixer together, stirring and mixing uniformly, and extruding the mixture into a belt shape through a double-screw extruder.
10. The method for preparing the degradable PET packing tape with flame retardant effect as claimed in claim 9, wherein the mixing temperature in the step S3 is 160-180 ℃, and the extrusion temperature is 130-140 ℃.
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| CN202110760614.XA CN113429755A (en) | 2021-07-06 | 2021-07-06 | Degradable PET packing belt with flame retardant effect |
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| CN202110760614.XA CN113429755A (en) | 2021-07-06 | 2021-07-06 | Degradable PET packing belt with flame retardant effect |
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Cited By (1)
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| CN115012067A (en) * | 2022-07-14 | 2022-09-06 | 杭州晨昊纺织整理有限公司 | Degradable polyester fabric and preparation method thereof |
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