Body flame-retardant and antistatic vacuum compression bag and preparation method thereof

Abstract

The invention provides a body flame-retardant and antistatic vacuum compression bag and a preparation method thereof, and belongs to the technical field of vacuum compression bags. The invention relates to a flame-retardant polyester resin, which is prepared from 2, 3-dibromo-1, 4-butanediol, pyromellitic dianhydride, 1, 3-dibromo-2-propanol, melamine, 2, 3-epoxypropyl trimethyl ammonium chloride, 2, 3-dibromosuccinic acid, a micromolecular brominated epoxy polymer (EP-700) and bottle-grade polyester chips through reaction and processing. The prepared vacuum compression bag product has the advantages of lasting flame retardant property, excellent antistatic property, excellent antibacterial property, excellent mechanical property and excellent gas isolation property, is suitable for home use, and can also be used in the field of industrial workshops with harsh conditions.

Description

Technical Field

[0001] This invention belongs to the field of vacuum compression bag technology, specifically relating to a flame-retardant and antistatic vacuum compression bag and its preparation method. Background Technology

[0002] As people's living standards improve, soft furnishings and household items such as quilts, made of flexible materials, tend to expand too much and take up a lot of space. These need to be compressed to reduce space usage. Vacuum compression bags are bags that remove air, allowing atmospheric pressure to compress them. With the expansion of their applications, they are now used for carrying clothing during outdoor travel and for material storage in industrial settings such as production workshops, addressing storage space issues. Whether for home or industrial use, most stored materials are soft and flammable. To ensure safety, especially for vacuum compression bags used in workshops and warehouses, high flame-retardant properties are required. Furthermore, as these are reusable products, high water resistance and flame-retardant durability are also essential. Environmental factors such as poor air circulation during storage can lead to mold growth, and industrial applications also require high levels of anti-static properties to prevent static electricity buildup and potential fires.

[0003] Currently, solutions to these problems often involve adding external flame retardants, antistatic agents, or mildew inhibitors. These additives are generally small-molecule powders with no mechanical properties of their own. Because the compression bag film material is thin, their addition significantly reduces the material's mechanical properties and affects its wear resistance and washability, leading to cracking and damage, severely reducing product lifespan and quality. To overcome these shortcomings, some studies have used multilayer film composites to prepare composite membrane materials for compression bag production, such as patent ZL201910453188.8. However, this not only increases the manufacturing process but also the difficulty and stability of process control, resulting in higher overall costs. Furthermore, it still cannot solve the problem of leakage caused by water or humid environments due to the added mildew inhibitors and antistatic agents, and these additives themselves do not possess flame-retardant properties. Summary of the Invention

[0004] To address the aforementioned problems, this invention develops a flame-retardant and antistatic vacuum compression bag and its preparation method. The bag is prepared from 2,3-dibromo-1,4-butanediol, pyromellitic dianhydride, 1,3-dibromo-2-propanol, melamine, 2,3-epoxypropyltrimethylammonium chloride, 2,3-dibromosuccinic acid, a small molecule brominated epoxy polymer (EP-700), and bottle-grade polyester chips through reaction and processing.

[0005] One of the objectives of this invention is to provide a vacuum compression bag that is flame-retardant and antistatic.

[0006] The second objective of this invention is to provide a method for preparing a flame-retardant and antistatic vacuum compression bag.

[0007] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted: In a first aspect, the present invention provides a bulk flame-retardant and antistatic vacuum compression bag, made of a film-forming material, wherein the film-forming material is prepared from raw materials comprising the following parts by mass: 2,3-Dibromo-1,4-Butanediol 2.2-2.7 parts; 0.8-1.3 parts of pyromellitic dianhydride; 1,3-Dibromo-2-propanol 1-1.5 parts; Melamine 0.3-0.5 parts; 0.8-1 part of 2,3-epoxypropyltrimethylammonium chloride; 1-1.3 parts xylene; 1.4-2 parts of 2,3-dibromosuccinic acid; 0.5-0.8 parts of brominated epoxy polymer; 1.5-2 parts of polyester chips.

[0008] Typical, but not limiting, parts by mass of 2,3-dibromo-1,4-butanediol are, for example, 2.2, 2.3, 2.4, 2.5, 2.6, and 2.7 parts. Typical, but not limiting, parts by mass of pyromellitic dianhydride are, for example, 0.8, 0.9, 1, 1.1, 1.2, and 1.3 parts. Typical, but not limiting, parts by mass of 1,3-dibromo-2-propanol are, for example, 1, 1.1, 1.2, 1.3, 1.4, or 1.5 parts. Typical, but not limited, parts by weight of melamine are, for example, 0.3, 0.4, and 0.5 parts; Typical, but not limiting, parts by mass of 2,3-epoxypropyltrimethylammonium chloride are, for example, 0.8, 0.9, or 1 part; Typical, but not limiting, parts by mass of xylene are, for example, 1, 1.1, 1.2, and 1.3 parts; Typical, but not limiting, parts by mass of 2,3-dibromosuccinic acid are, for example, 1.4, 1.5, 1.6, 1.8, or 2 parts. Typical, but not limiting, parts by weight of brominated epoxy polymers are, for example, 0.5, 0.6, 0.7, and 0.8 parts; Typical, but not limiting, parts by weight of polyester chips are, for example, 1.5, 1.6, 1.8, or 2 parts.

[0009] The brominated epoxy polymer is a small-molecule, low-softening-point brominated epoxy polymer, model EP-700, with a bromine content of 48%, a softening point of 53-58℃, and an epoxy equivalent of 340-350 g / mol, purchased from Jiangsu Xingsheng Chemical Co., Ltd.

[0010] The polyester chips, bottle-grade polyester chips, were purchased from Jilin Petrochemical Branch of China National Petroleum Corporation.

[0011] The raw materials also include the catalyst monobutyltin oxide, which is used at 0.08-0.12% of the mass of pyromellitic dianhydride; and the antioxidant 1076, which is used at 0.15-0.3% of the mass of pyromellitic dianhydride.

[0012] Secondly, the present invention provides a method for preparing the above-mentioned flame-retardant and antistatic vacuum compression bag, comprising the following steps: A. Add the solvent xylene, 2,3-epoxypropyltrimethylammonium chloride and melamine in the formula amount to the reaction vessel A, heat up to carry out the ring-opening grafting reaction, when the epoxy equivalent of the reactants reaches 1500-1650 g / mol, add the formula amount of pyromellitic dianhydride and 1 / 3 of the formula amount of catalyst, heat up to carry out the amidation reaction. B. When the free amine value of the polymer reaches 5-10 mg KOH / g, add the amount of 1,3-dibromo-2-propanol in the formula, and heat to the boiling point of xylene to carry out the dehydration esterification reaction. C. When the conversion rate of 1,3-dibromo-2-propanol reaches more than 97%, the synthetic intermediate is obtained and pumped to a high-level tank for later use. D. Add the prescribed amount of 2,3-dibromo-1,4-butanediol and the remaining prescribed amount of catalyst to reactor B, and heat up. Then add the prescribed amount of 2,3-dibromosuccinic acid, heat up and maintain the temperature for reaction. When the acid value of the polymer reaches 10-18 mgKOH / g, continuously purge nitrogen gas, add the intermediate synthesized in step C, and heat up to carry out the polymerization reaction. During the heating process, xylene solvent is removed simultaneously. E. When the acid value of the polymer reaches 38-46 mgKOH / g, add the prescribed amount of brominated epoxy polymer to continue the chain extension polymerization reaction. When the acid value of the polymer reaches 14-19 mgKOH / g, add the prescribed amount of antioxidant, raise the temperature, start the vacuum system to carry out the vacuum polycondensation reaction. When the acid value is lower than 2 mgKOH / g, release the vacuum system, add the prescribed amount of polyester chips, carry out high-temperature melt mixing, and obtain vacuum compression bag film-forming material particles through steel belt cooling and crushing. F. The above-mentioned vacuum compression bag film-forming material particles are fed into a twin-screw extruder, melted at high temperature in the barrel, extruded through the die head and fed into a casting machine to cast film to obtain a vacuum compression bag film. G. Then, the film is cut and sealed with a zipper and vacuum extraction hole to obtain a vacuum compression bag product.

[0013] In some embodiments, in step A, the temperature is raised to 85-90°C to carry out the ring-opening grafting reaction; and the temperature is raised to 135-137°C to carry out the amidation reaction. In some embodiments, in step D, the temperature is raised to 140-145°C; the temperature is raised to 170-175°C at a heating rate of 15-18°C / h for a holding reaction; and the temperature is raised to 230-235°C at a heating rate of 10-12°C / h for a polymerization reaction. In some embodiments, in step E, the temperature is raised to 245-250°C to carry out a vacuum polycondensation reaction, and the vacuum degree is controlled at -0.095 to -0.098 MPa; the high-temperature melting temperature is 260-270°C. In some embodiments, in step F, the barrel temperature is 270-280°C, the die head temperature is 285-290°C, and the casting temperature is 230-240°C. In one specific embodiment, the preparation method of the body-flame-retardant and antistatic vacuum compression bag includes the following steps: A. Add the solvent xylene, 2,3-epoxypropyltrimethylammonium chloride and melamine in the formula to reactor A, and heat to 85-90℃ to carry out the ring-opening grafting reaction. Take a sample to test the epoxy equivalent of the reactants. When the epoxy equivalent of the reactants reaches 1500-1650 g / mol, it indicates that the grafting reaction is basically completed. At this time, add pyromellitic dianhydride and 1 / 3 of the catalyst monobutyltin oxide, and heat to 135-137℃ to carry out the amidation reaction. B. Sampling and detection by liquid chromatography. When the free amine value of the polymer reaches 5-10 mg KOH / g, it indicates that the grafting of the amino intermediate is basically completed. At this time, add the amount of 1,3-dibromo-2-propanol in the formula and heat to the boiling point of xylene to carry out the dehydration and esterification reaction. C. The content of 1,3-dibromo-2-propanol is detected by gas chromatography. When the conversion rate of 1,3-dibromo-2-propanol reaches more than 97%, it indicates that the esterification reaction is basically completed and the synthesized intermediate is obtained. It is then pumped to a high-level tank for later use. D. Add the prescribed amount of 2,3-dibromo-1,4-butanediol and the remaining catalyst monobutyltin oxide to reactor B, and heat to 140-145℃. Then add the prescribed amount of 2,3-dibromosuccinic acid, and gradually heat to 170-175℃ at a heating rate of 15-18℃ / h, and maintain the temperature for reaction. When the acid value of the polymer reaches 10-18 mgKOH / g, continuously purge nitrogen gas, add the synthesis intermediate raw material from the high-level tank in step C, and gradually heat to 230-235℃ at a heating rate of 10-12℃ / h, and continue to maintain the temperature for polymerization reaction; during the heating process, xylene solvent is removed simultaneously. E. Sampling and testing: When the acid value of the polymer reaches 38-46 mgKOH / g, add the prescribed amount of brominated epoxy polymer and continue the chain extension polymerization reaction at 230-235℃. When the acid value of the polymer reaches 14-19 mgKOH / g, add the prescribed amount of antioxidant 1076 and raise the temperature to 245-250℃. Start the vacuum system to carry out the vacuum polycondensation reaction, and control the vacuum degree at -0.095 to -0.098 MPa. When the acid value is lower than 2 mgKOH / g, release the vacuum system, add the prescribed amount of specific polyester chips, and melt and mix them uniformly at 260-270℃. After cooling and crushing with a steel belt, obtain the vacuum compression bag film-forming material particles. F. The above-mentioned vacuum compression bag film-forming material particles are fed into a twin-screw extruder, melted in the barrel at a high temperature of 270-280°C, extruded through the die head and fed into a casting machine, and cast into a film at 230-240°C to obtain the vacuum compression bag film of the present invention, wherein the die head temperature is 285-290°C. G. The film material is then cut and sealed with a zipper and vacuum extraction hole to obtain a vacuum compression bag product.

[0014] The membrane material used in the vacuum compression bag of this invention is prepared by reacting and processing 2,3-dibromo-1,4-butanediol, pyromellitic dianhydride, 1,3-dibromo-2-propanol, melamine, 2,3-epoxypropyltrimethylammonium chloride, 2,3-dibromosuccinic acid, small molecule brominated epoxy polymer (EP-700), and bottle-grade polyester chips. First, under suitable catalyst and process conditions, an epoxy-polyester chain extender resin with excellent bulk flame retardancy and barrier properties is prepared. Then, the obtained epoxy-polyester chain extender resin is fully melted and dispersed with specific polyester chips at high temperature to obtain a mixture product. After calendering, cooling, and winding, the vacuum compression bag membrane material is obtained. After cutting, sealing zippers and vacuum extraction holes are installed to obtain the vacuum compression bag product.

[0015] Beneficial effects: The polymer molecular chains prepared in this invention contain high levels of flame-retardant elements such as bromine and nitrogen. Furthermore, it utilizes special linear monomers such as 2,3-dibromo-1,4-butanediol and 2,3-dibromosuccinic acid. Simultaneously, functional monomers containing specific quaternary ammonium salt functional groups and 1,3-dibromo-2-propanol ester groups are introduced into the chain segments. The introduction of specific quaternary ammonium salt functional groups provides the polymer resin with durable antistatic, antibacterial, and antifungal properties. The introduction of 1,3-dibromo-2-propanol ester groups increases the melt flowability of the resin, thereby improving the isolation performance of the compression bag membrane. By grafting small-molecule brominated epoxy polymers into the molecular chains through polymerization, and utilizing the excellent adhesive molding properties of small-molecule epoxy resins, not only are their tensile strength and flame-retardant properties improved, but more importantly, the porosity of the membrane material surface is further reduced, further enhancing the isolation performance of the membrane material. Moreover, there are no compatibility issues between the two. Finally, combining them with polyester chips further enhances mechanical properties, isolation properties, and waterproofing, resulting in a membrane material product with excellent comprehensive performance.

[0016] The vacuum compression bag product finally prepared by this invention not only has excellent long-lasting flame retardant and antistatic properties, but also has excellent antibacterial, mechanical, and gas isolation properties. It is suitable not only for home use, but also for use in industrial workshops with more demanding conditions.

[0017] The product of this invention is prepared by single-film formation. The preparation process does not require multiple layers of plastic film to achieve the above-mentioned functions, and has the advantages of simple preparation process and high production efficiency.

[0018] The present invention has been described in detail above; however, the above embodiments are merely illustrative in nature and are not intended to limit the invention. Furthermore, this document is not limited to the foregoing prior art or the invention itself, or to any theory described in the following embodiments. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments. It should be noted that the following embodiments are provided for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention.

[0020] Unless otherwise specified, the raw materials, reagents, and methods used in the embodiments are all conventional raw materials, reagents, and methods in the art.

[0021] Acid value determination: according to the method of HG / T 2708-95 "Determination of Acid Value in Polyester Polyols"; Determination of free amine value: according to standard ZBG71005-89 "Determination of total amine value of fatty amines"; Determination of epoxy equivalent: according to GB / T 4612-2008 "Determination of epoxy equivalent in epoxide compounds for plastics"; The brominated epoxy polymer is a small-molecule, low-softening-point brominated epoxy polymer, model EP-700, with a bromine content of 48%, a softening point of 54℃, and an epoxy equivalent of 343 g / mol, purchased from Jiangsu Xingsheng Chemical Co., Ltd.

[0022] The polyester chips, bottle-grade polyester chips, were purchased from Jilin Petrochemical Branch of China National Petroleum Corporation.

[0023] Example 1 A flame-retardant and antistatic vacuum compression bag comprises the following raw materials in parts by weight: 2,3-Dibromo-1,4-Butanediol 2.3 parts; 1 part of pyromellitic dianhydride; 1 part of 1,3-dibromo-2-propanol; 0.4 parts of melamine; 0.8 parts of 2,3-epoxypropyltrimethylammonium chloride; 1 part xylene; 1.5 parts of 2,3-dibromosuccinic acid; 0.7 parts of brominated epoxy polymer; 1.8 parts of polyester chips; The catalyst is monobutyltin oxide, used in an amount of 0.1% of the mass of pyromellitic dianhydride; Antioxidant 1076 is used at a rate of 0.2% of the mass of pyromellitic dianhydride.

[0024] The method for preparing the above-mentioned flame-retardant and antistatic vacuum compression bag includes the following steps: A. Add the solvent xylene, 2,3-epoxypropyltrimethylammonium chloride and melamine in the formula to reactor A, and heat to 90℃ to carry out the ring-opening grafting reaction. Take a sample to test the epoxy equivalent of the reactants. When the epoxy equivalent of the reactants reaches 1500-1650 g / mol, it indicates that the grafting reaction is basically completed. At this time, add pyromellitic dianhydride and 1 / 3 of the catalyst monobutyltin oxide, and heat to 136℃ to carry out the amidation reaction. B. Sampling and detection by liquid chromatography. When the free amine value of the polymer reaches 5-10 mg KOH / g, it indicates that the grafting of the amino intermediate is basically completed. At this time, add the amount of 1,3-dibromo-2-propanol in the formula and heat to the boiling point of xylene to carry out the dehydration and esterification reaction. C. The content of 1,3-dibromo-2-propanol is detected by gas chromatography. When the conversion rate of 1,3-dibromo-2-propanol reaches more than 97%, it indicates that the esterification reaction is basically completed and the synthesized intermediate is obtained. It is then pumped to a high-level tank for later use. D. Add the prescribed amount of 2,3-dibromo-1,4-butanediol and the remaining catalyst monobutyltin oxide to reactor B, and heat to 145°C. Then add the prescribed amount of 2,3-dibromosuccinic acid, and gradually heat to 175°C at a heating rate of 15°C / h and hold for reaction. When the acid value of the polymer reaches 10-18 mgKOH / g, continuously purge nitrogen gas, add the synthesis intermediate raw material from the high-level tank in step C, and gradually heat to 235°C at a heating rate of 12°C / h and continue to hold for polymerization reaction. During the heating process, remove the solvent xylene. E. Sampling and testing: When the acid value of the polymer reaches 38-46 mgKOH / g, add the prescribed amount of brominated epoxy polymer EP-700 and continue the chain extension polymerization reaction at 235℃. When the acid value of the polymer reaches 14-19 mgKOH / g, add the prescribed amount of antioxidant 1076 and raise the temperature to 250℃. Start the vacuum system to carry out the vacuum polycondensation reaction, and control the vacuum degree at -0.098 MPa. When the acid value is lower than 2 mgKOH / g, release the vacuum system, add the prescribed amount of polyester chips, and melt and mix them evenly at 260℃. After cooling and crushing with a steel belt, obtain the vacuum compression bag film-forming material particles. F. The above-mentioned vacuum compression bag film-forming material particles are fed into a twin-screw extruder, melted at 270°C in the barrel, extruded at 290°C in the die head and fed into a casting machine, and cast at 240°C to obtain a vacuum compression bag film. G. The film material is then cut and sealed with a zipper and vacuum extraction hole to obtain a vacuum compression bag product.

[0025] Example 2 A flame-retardant and antistatic vacuum compression bag comprises the following raw materials in parts by weight: 2.2 parts of 2,3-dibromo-1,4-butanediol; 0.8 parts of pyromellitic dianhydride; 1.3 parts of 1,3-dibromo-2-propanol; 0.5 parts of melamine; 1 part of 2,3-epoxypropyltrimethylammonium chloride; 1.2 parts xylene; 2,3-Dibromosuccinic acid, 2 parts; 0.8 parts of brominated epoxy polymer; 1.5 portions of polyester chips; The catalyst is monobutyltin oxide, used in an amount of 0.08% of the mass of pyromellitic dianhydride; Antioxidant 1076 is used at a rate of 0.15% of the mass of pyromellitic dianhydride.

[0026] The preparation method is the same as in Example 1.

[0027] Example 3 A flame-retardant and antistatic vacuum compression bag comprises the following raw materials in parts by weight: 2.7 parts of 2,3-dibromo-1,4-butanediol; 1.1 parts of pyromellitic dianhydride; 1.5 parts of 1,3-dibromo-2-propanol; 0.3 parts of melamine; 0.9 parts of 2,3-epoxypropyltrimethylammonium chloride; 1.3 parts xylene; 1.6 parts of 2,3-dibromosuccinic acid; 0.6 parts of brominated epoxy polymer; Two portions of polyester chips; The catalyst is monobutyltin oxide, used in an amount of 0.12% of the mass of pyromellitic dianhydride; Antioxidant 1076 is used at a rate of 0.3% of the mass of pyromellitic dianhydride.

[0028] The preparation method is the same as in Example 1.

[0029] Example 4 A flame-retardant and antistatic vacuum compression bag comprises the following raw materials in parts by weight: 2.5 parts of 2,3-dibromo-1,4-butanediol; 0.9 parts of pyromellitic dianhydride; 1.2 parts of 1,3-dibromo-2-propanol; 0.4 parts of melamine; 0.8 parts of 2,3-epoxypropyltrimethylammonium chloride; 1 part xylene; 1.8 parts of 2,3-dibromosuccinic acid; 0.5 parts of brominated epoxy polymer; 1.8 parts of polyester chips; The catalyst is monobutyltin oxide, used in an amount of 0.09% of the mass of pyromellitic dianhydride; Antioxidant 1076 is used at a rate of 0.18% of the mass of pyromellitic dianhydride.

[0030] The preparation method is the same as in Example 1.

[0031] Comparative Example 1 Everything else is the same as in Example 1, except that 1,3-dibromo-2-propanol is not used; Comparative Example 2 The process is the same as in Example 1, except that in step E, the brominated epoxy polymer EP-700 is not added to participate in the polymerization reaction. Instead, it is directly mixed with the resin prepared in step D of this invention by a dry method and then film is formed.

[0032] Comparative Example 3 High-density polyethylene resin and polyester resin chips are mixed at a mass ratio of 1:2. Melamine cyanurate (MCA) at a mass fraction of 5% of the resin is added as a flame retardant, and stearyltrimethylammonium chloride at a mass fraction of 8% of the resin is added as an antistatic agent and a mildew inhibitor. Then, a film is formed.

[0033] Test method: Mechanical property (tensile force) testing was conducted in accordance with GB / T1040.3-2006 "Determination of tensile properties of plastics - Part 3: Test conditions for films and sheets". The selected specimen was a strip with a length of ≥150 mm, a width of 15 mm, a film thickness of 0.08 mm, an unloaded speed of (250±25) mm / min, and a tensile force P, which was the maximum load at which the film broke. Flame retardant performance: Oxygen index testing was conducted according to GB / T2406.2-2009 "Determination of flammability by oxygen index method for plastics - Part 2: Room temperature test"; oxygen permeability testing was conducted according to GB / T 1038-2022 "Test method for gas permeability of plastic films and sheets", unit: cm. 3 / (m 2 0.24h.0.1MPa); The water vapor transmission rate test was conducted according to condition A in GB / T 1037-2021 "Determination of Water Vapor Transmission Performance of Plastic Films and Sheets - Cup Method for Weight Gain and Loss". The antibacterial performance is based on QB / T2591-2003 "Test Methods and Antibacterial Effects of Antibacterial Plastics" for the antibacterial effect of vacuum compression bag film materials against Escherichia coli and mold. Among them, the mold growth grade 0 has strong anti-mold performance, indicating that the anti-mold performance is better than grade 1.

[0034] The antistatic properties of the vacuum compression bag film material surface were tested according to GB / T 1410-2006 "Test Methods for Volume Resistivity and Surface Resistivity of Solid Insulating Materials".

[0035] The test results of the vacuum compression bag film materials prepared in the above embodiments and comparative examples are shown in Table 1 below.

[0036] Table 1

[0037] Table 2. Results of flame retardant, mildew-proof, and antistatic properties after immersion in water at 25℃ (96 h).

[0038] As can be seen from Tables 1 and 2, the vacuum packaging bags prepared using the single-layer film material of this invention have a smooth and flat surface, with tensile strength generally above 51N. Furthermore, the oxygen and water vapor permeability are relatively low. In terms of flame retardancy, the oxygen index is generally above 34%, demonstrating excellent flame retardancy. In addition, the antibacterial rate against Staphylococcus aureus reaches over 98.5%, and the mold growth rating is also 0, exhibiting excellent antibacterial and anti-mold properties. Moreover, in terms of antistatic properties, the surface resistivity is generally around 10 × 10⁻⁶. 7 The product exhibits excellent antistatic properties. Furthermore, its water resistance is outstanding; after 96 hours of immersion in water, its various properties, such as oxygen index, antibacterial, antifungal, and antistatic properties, show no significant changes, demonstrating the excellent durability of these functions.

[0039] In contrast, Comparative Example 1 did not use 1,3-dibromo-2-propanol in the esterification reaction, resulting in a product with excessively high functionality and high melt viscosity. This led to a decrease in the isolation performance of the compression bag film, and the decrease in bromine content also resulted in a decrease in the oxygen index and a reduction in flame retardant performance. Comparative Example 2, which uses brominated epoxy polymer EP-700 to prepare vacuum packaging bags without participating in the polymerization reaction of the product of this invention, but instead using a direct physical mixing method, showed no significant change in flame retardant properties. However, its mechanical properties, such as tensile strength, decreased significantly, as did its oxygen permeability and water vapor permeability. This indicates that the direct mixing method is insufficient to achieve the application effect of this invention.

[0040] Comparative Example 3 uses added flame retardants and quaternary ammonium salt antistatic components to achieve flame retardant and antistatic effects. However, these small molecule additives have insufficient water resistance and show significant loss after 96 hours of immersion in aqueous solution, resulting in a significant decrease in oxygen index. Moreover, the antibacterial, antifungal, and antistatic properties are also greatly reduced, which is far inferior to the product of this invention.

[0041] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, without departing from the spirit and substance defined by the claims of the present invention; and such modifications or substitutions are still within the scope defined by the claims of the present invention.

Claims

1. A bulk flame-retardant, antistatic vacuum compression bag characterized in that, The film-forming material is prepared from raw materials including the following mass fractions: 2,3-dibromo-1,4-butanediol 2.2-2.7 parts; pyromellitic dianhydride 0.8-1.3 parts; 1,3-dibromo-2-propanol 1-1.5 parts; melamine 0.3-0.5 parts; 2,3-epoxypropyltrimethylammonium chloride 0.8-1 part; xylene 1-1.3 parts; 2,3-dibromosuccinic acid 1.4-2 parts; brominated epoxy polymer 0.5-0.8 parts; polyester chips 1.5-2 parts.

2. The bulk flame retardant, antistatic vacuum compression bag according to claim 1, characterized in that, The softening point of the brominated epoxy polymer is 53-58℃, and the epoxy equivalent weight is 340-350 g / mol.

3. The bulk flame retardant, antistatic vacuum compression bag according to claim 1, characterized in that, The raw materials for preparing the film-forming material further include a catalyst and an antioxidant; the catalyst is monobutyl tin oxide, and the amount is 0.08-0.12% of the mass of the pyromellitic dianhydride; the antioxidant is antioxidant 1076, and the amount is 0.15-0.3% of the mass of the pyromellitic dianhydride.

4. A process for the production of bulk flame retardant, antistatic vacuum compression bags according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: A. adding the formula amount of solvent xylene, 2,3-epoxypropyltrimethylammonium chloride and melamine into a reaction kettle A, and performing ring-opening grafting reaction by heating, when the epoxy equivalent weight of the reactants reaches 1500-1650 g / mol, adding the formula amount of pyromellitic dianhydride and 1 / 3 of the formula amount of the catalyst, and performing amidation reaction by heating; B. when the free amine value of the polymer reaches 5-10 mgKOH / g, adding the formula amount of 1,3-dibromo-2-propanol, and performing water-removing esterification reaction by heating to the boiling point of xylene; C. when the conversion rate of 1,3-dibromo-2-propanol reaches more than 97%, obtaining a synthesized intermediate, pumping into a head tank, and reserving for use; D. adding the formula amount of 2,3-dibromo-1,4-butanediol and the remaining formula amount of the catalyst into a reaction kettle B, and heating, then adding the formula amount of 2,3-dibromosuccinic acid, and performing heat preservation reaction by heating, when the acid value of the polymer reaches 10-18 mgKOH / g, continuously blowing nitrogen, adding the intermediate synthesized in step C, and performing polymerization reaction by heating, wherein the solvent xylene is removed at the same time during the heating process; E. when the acid value of the polymer reaches 38-46 mgKOH / g, adding the formula amount of brominated epoxy polymer to continue chain extension polymerization reaction, when the acid value of the polymer reaches 14-19 mgKOH / g, adding the formula amount of antioxidant, heating, starting the vacuum system to perform vacuum polycondensation reaction, when the acid value is lower than 2 mgKOH / g, removing the vacuum system, adding the formula amount of polyester chips, and performing high-temperature melt mixing, and then obtaining vacuum compression bag film material particles through steel belt cooling and crushing; F. feeding the above vacuum compression bag film material particles into a double-screw extruder, and then feeding into a casting machine through high-temperature melt in a barrel and extrusion in a die, and then obtaining a vacuum compression bag film through casting and film forming; G. cutting the film again, installing a sealed zipper and a vacuum air hole to obtain a vacuum compression bag product.

5. The production method according to claim 4, characterized by, In step A, the ring-opening grafting reaction is performed by heating to 85-90℃, and the amidation reaction is performed by heating to 135-137℃.

6. The preparation method according to claim 4, characterized in that, In Step D, the temperature is raised to 140-145°C, and then the temperature is raised to 170-175°C at a rate of 15-18°C / h, and the reaction is carried out at the temperature; and then the temperature is raised to 230-235°C at a rate of 10-12°C / h, and the polymerization is carried out at the temperature.

7. The preparation method according to claim 4, characterized in that, In Step E, the temperature is raised to 245-250°C, and then the vacuum polycondensation is carried out at the temperature, and the vacuum degree is controlled at -0.095 to -0.098 MPa; and the high-temperature melting temperature is 260-270°C.

8. The preparation method according to claim 4, characterized in that, In Step F, the temperature of the barrel is 270-280°C, the temperature of the die is 285-290°C, and the casting temperature is 230-240°C.

Images