CN114434721A - Preparation method of gradient type foam buffer material for individual soldier bulletproof equipment and buffer material - Google Patents

Preparation method of gradient type foam buffer material for individual soldier bulletproof equipment and buffer material Download PDF

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Publication number
CN114434721A
CN114434721A CN202210120900.4A CN202210120900A CN114434721A CN 114434721 A CN114434721 A CN 114434721A CN 202210120900 A CN202210120900 A CN 202210120900A CN 114434721 A CN114434721 A CN 114434721A
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fiam
eva
preparing
gradient
parts
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杨喆
唐帆
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Beijing Zhongke Lixin Technology Co ltd
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Beijing Zhongke Lixin Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/22—All layers being foamed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • 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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to the technical field of foam buffer materials, and provides a preparation method of a gradient type foam buffer material for individual soldier bulletproof equipment and a buffer material, wherein the preparation method of the gradient type foam buffer material for the individual soldier bulletproof equipment comprises the following steps: preparing a flexible intelligent impact-resistant gel material; preparing a FIAM-EVA material, namely treating the flexible intelligent impact-resistant gel material and the first composition to obtain FIAM-EVA materials with different densities and different hardnesses; and preparing a gradient foam buffer material, namely overlapping a plurality of FIAM-EVA materials according to the density and hardness from high to low to obtain the gradient foam buffer material. The gradient foam buffer material prepared by the technical scheme obviously improves the impact protection performance.

Description

Preparation method of gradient type foam buffer material for individual soldier bulletproof equipment and buffer material
Technical Field
The invention relates to the technical field of foam buffer materials, in particular to a preparation method of a gradient type foam buffer material for individual soldier bulletproof equipment and the buffer material.
Background
The individual bulletproof equipment is an important barrier for guaranteeing the life safety of soldiers, and the basic requirements for performance evaluation are to resist penetration of bullets and prevent penetration and blunt injuries of human bodies. The individual bulletproof equipment mainly comprises a bulletproof layer and a buffer layer, wherein the bulletproof layer mainly plays a bulletproof role and is used for resisting penetration of bullets, and the buffer layer mainly plays a protective role and is used for weakening blunt injury caused by the fact that bulletproof clothes impact human bodies.
The buffer layer of the existing individual bulletproof equipment usually adopts a low-density EVA (ethylene-vinyl acetate copolymer) foam material, but the EVA has larger deformation under ballistic impact, and the protective performance of the EVA needs to be further optimized and improved. How to effectively solve the technical difficulties is a problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the invention provides a preparation method of a gradient type foam buffer material for individual bulletproof equipment and the buffer material.
The preparation method of the gradient foam buffer material for the individual bulletproof equipment comprises the following steps:
preparing a flexible intelligent impact-resistant gel material;
preparing a FIAM-EVA material, namely treating the flexible intelligent impact-resistant gel material and the first composition to obtain FIAM-EVA materials with different densities and different hardnesses;
and preparing a gradient foam buffer material, namely overlapping a plurality of FIAM-EVA materials according to the density and hardness from high to low to obtain the gradient foam buffer material.
Further, in the step of preparing the flexible intelligent impact-resistant gel material, the preparation material comprises the following components:
83.33-94.34 parts of hydroxyl silicone oil and 5.66-16.67 parts of boric acid.
Further, in the step of preparing the flexible intelligent impact-resistant gel material, the method comprises the following steps:
a dissolving step, namely adding the boric acid and glycerol with the volume 5 times that of the boric acid into a reaction container, starting stirring, setting the temperature of an electric furnace to be 80-84 ℃, continuing stirring for 27-33min when the temperature reaches the set temperature, and keeping the stirring speed at 300 revolutions per minute until the reactants are colorless and transparent, wherein the boric acid is completely dissolved in the glycerol;
a first heating step, adding the hydroxyl silicone oil into the reaction container, starting stirring, setting the temperature of the electric furnace to be 140-148 ℃, continuing stirring when the temperature reaches the set temperature, keeping for 4 hours, then closing stirring, standing for 10 minutes, and pouring out the upper layer liquid in the reaction container, wherein the upper layer liquid is the first mixture;
and a second heating step, namely putting the first mixture into a vacuum drying box, vacuumizing, keeping the temperature at 160-163 ℃, keeping the temperature for 2 hours when the temperature reaches the set temperature, and naturally cooling to obtain the flexible intelligent impact-resistant gel material, wherein the pressure in the vacuumizing process is between-1 MPa and-4 MPa.
Further, in the step of preparing the FIAM-EVA material, the first composition component includes:
68-71 parts of ethylene-vinyl acetate copolymer, 17-21 parts of calcium powder, 3-5 parts of azodicarbonamide, 1.5-3 parts of zinc oxide, 0.8-1.1 parts of stearic acid and 0.6-1.1 parts of dicumyl peroxide.
Further, in the step of preparing the FIAM-EVA material, the flexible smart impact-resistant gel material and the first composition are processed by:
heating a double-roller rubber mixing mill to the temperature of 116 ℃ and 122 ℃, adding the ethylene-vinyl acetate copolymer and 5-15 parts of flexible intelligent impact-resistant gel material, and stirring for 1.5-2h to uniformly mix the materials to obtain a second mixture;
adding the calcium powder, the azodicarbonamide, the zinc oxide, the stearic acid and the dicumyl peroxide into the second mixture, and carrying out secondary banburying to obtain a third mixture;
and (3) placing the third mixture into a foaming machine, and foaming for 13-26min at the temperature of 148-156 ℃ to obtain the FIAM-EVA material.
Further, in the step of preparing the FIAM-EVA material:
the flexible intelligent impact-resistant gel material is processed with the first composition respectively by using three contents of 5 parts and 10 parts and 15 parts, so that a first FIAM-EVA material, a second FIAM-EVA material and a third FIAM-EVA material with different densities and different hardnesses are obtained.
Further, when 5 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 6;
when 10 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 10;
when 15 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 15.
Further, in the step of preparing the gradient foam buffer material:
superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and hardness from high to low to obtain a positive gradient material;
and the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient foam buffer material.
Further, in the step of preparing the gradient foam buffer material:
superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and the hardness from low to high to obtain a negative gradient material;
and the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient foam buffer material.
A gradient foam buffer material for individual bulletproof equipment is prepared by adopting the preparation method of the gradient foam buffer material for the individual bulletproof equipment.
The gradient foam buffer material provided by the invention obviously improves the impact protection performance.
Drawings
FIG. 1 is a schematic diagram of a FIAM-EVA positive gradient material provided by the present invention;
FIG. 2 is a schematic diagram of a FIAM-EVA negative gradient material provided by the present invention;
FIG. 3 is a graph of loss factors of the EVA matrix and the FIAM-EVA gradient material of the present invention;
reference numerals:
1. a first FIAM-EVA material;
2. a second FIAM-EVA material;
3. a third FIAM-EVA material;
4. an interfacial bonding layer.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The following examples are intended to illustrate the invention, but not to limit it. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "connected" and "coupled" are used broadly and may include, for example, a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate medium. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Example 1
Adding boric acid and glycerol with the volume 5 times that of the boric acid into a reaction container, starting stirring, setting the temperature of an electric furnace to be 80 ℃, continuing stirring for 33min when the temperature reaches the set temperature, wherein the stirring speed is 300 r/min until the reactant is colorless and transparent, and the boric acid is completely dissolved in the glycerol.
After the boric acid is completely dissolved in the glycerol, adding hydroxyl silicone oil into the reaction vessel, simultaneously starting stirring, setting the temperature of the electric furnace to be 140 ℃, continuing stirring when the temperature reaches the set temperature, keeping for 4 hours, then closing stirring, standing for 10min, and pouring out the upper layer liquid in the reaction vessel, wherein the upper layer liquid is a first mixture.
Wherein, 94.34 parts of hydroxyl silicone oil and 5.66 parts of boric acid. In the invention, the total weight of the boric acid and the hydroxyl silicone oil can also be 5-15% of the total weight of all the raw materials.
And putting the first mixture into a vacuum drying oven, vacuumizing, keeping the pressure of 4MPa and the set temperature of 160 ℃ in the vacuumizing process for 2 hours when the temperature reaches the set temperature, and naturally cooling to obtain the flexible intelligent impact-resistant gel material (FIAM).
And (3) heating the two-roll rubber mixing mill to 122 ℃, adding the ethylene-vinyl acetate copolymer and 5 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.5 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
And placing the third mixture into a foaming machine, foaming for 13min at the temperature of 156 ℃, wherein the foaming ratio is 6, and obtaining the first FIAM-EVA material.
And (3) heating the two-roll rubber mixing mill to 122 ℃, adding the ethylene-vinyl acetate copolymer and 10 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.5 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
And (3) placing the third mixture into a foaming machine, foaming for 13min at the temperature of 156 ℃, wherein the foaming ratio is 10, and thus obtaining a second FIAM-EVA material.
And (3) heating the two-roll rubber mixing mill to 122 ℃, adding the ethylene-vinyl acetate copolymer and 15 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.5 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
Wherein, the ethylene-vinyl acetate copolymer comprises 71 parts of ethylene-vinyl acetate copolymer, 17 parts of calcium powder, 5 parts of azodicarbonamide, 1.5 parts of zinc oxide, 1.1 parts of stearic acid and 0.6 part of dicumyl peroxide.
And (3) placing the third mixture into a foaming machine, foaming for 13min at the temperature of 156 ℃, wherein the foaming ratio is 15, and obtaining a third FIAM-EVA material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material from high to low according to different requirements to obtain the positive gradient material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and the hardness from low to high to obtain the negative gradient material.
In the positive gradient material or the negative gradient material, the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient type foam buffer material. Wherein, the interface connecting layer is EVA foam special glue.
A gradient foam buffer material for individual bulletproof equipment is prepared by the preparation method.
Example 2
Adding boric acid and glycerol with the volume 5 times that of the boric acid into a reaction container, starting stirring, setting the temperature of an electric furnace to 82 ℃, continuing stirring for 30min when the temperature reaches the set temperature, wherein the stirring speed is 300 r/min until the reactant is colorless and transparent, and the boric acid is completely dissolved in the glycerol.
After boric acid is completely dissolved in glycerol, adding hydroxyl silicone oil into the reaction vessel, simultaneously starting stirring, setting the temperature of the electric furnace to 144 ℃, continuing stirring and keeping for 4 hours when the temperature reaches the set temperature, then closing stirring, standing for 10 minutes, and pouring out the upper layer liquid in the reaction vessel, wherein the upper layer liquid is a first mixture.
88.33 parts of hydroxyl silicone oil and 11.67 parts of boric acid.
And putting the first mixture into a vacuum drying box, vacuumizing, keeping the pressure at-2 MPa and the set temperature at 162 ℃ in the vacuumizing process for 2 hours when the temperature reaches the set temperature, and naturally cooling to obtain the flexible intelligent impact-resistant gel material.
And (3) heating the two-roll rubber mixing mill to 119 ℃, adding the ethylene-vinyl acetate copolymer and 5 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.7 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
And (3) placing the third mixture into a foaming machine, foaming for 20min at the temperature of 152 ℃, wherein the foaming ratio is 6, and thus obtaining the first FIAM-EVA material.
And (3) heating the two-roll rubber mixing mill to 119 ℃, adding the ethylene-vinyl acetate copolymer and 10 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.7 hours to uniformly mix the materials to obtain a second mixture.
And adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and carrying out secondary banburying to obtain a third mixture.
And placing the third mixture into a foaming machine, foaming for 19min at the temperature of 152 ℃, wherein the foaming ratio is 10, and obtaining a second FIAM-EVA material.
And (3) heating the two-roll rubber mixing mill to 119 ℃, adding the ethylene-vinyl acetate copolymer and 15 parts of the flexible intelligent impact-resistant gel material, and stirring for 1.8 hours to uniformly mix the materials to obtain a second mixture.
And adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and carrying out secondary banburying to obtain a third mixture.
Wherein, the ethylene-vinyl acetate copolymer comprises 69 parts of ethylene-vinyl acetate copolymer, 19 parts of calcium powder, 4 parts of azodicarbonamide, 5 parts of zinc oxide, 1 part of stearic acid and 0.8 part of dicumyl peroxide.
And (3) placing the third mixture into a foaming machine, foaming for 19min at the temperature of 152 ℃, wherein the foaming ratio is 15, and obtaining a third FIAM-EVA material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material from high to low according to different requirements to obtain the positive gradient material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and the hardness from low to high to obtain the negative gradient material.
In the positive gradient material or the negative gradient material, the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient type foam buffer material.
A gradient foam buffer material for individual bulletproof equipment is prepared by the preparation method.
Example 3
Adding boric acid and glycerol with the volume 5 times that of the boric acid into a reaction container, starting stirring, setting the temperature of an electric furnace to 84 ℃, continuing stirring for 27min when the temperature reaches the set temperature, wherein the stirring speed is 300 r/min until the reactant is colorless and transparent, and the boric acid is completely dissolved in the glycerol.
After boric acid is completely dissolved in glycerol, adding hydroxyl silicone oil into the reaction vessel, simultaneously starting stirring, setting the temperature of the electric furnace to be 148 ℃, continuing stirring and keeping for 4 hours when the temperature reaches the set temperature, then closing stirring, standing for 10 minutes, and pouring out the upper layer liquid in the reaction vessel, wherein the upper layer liquid is a first mixture.
83.33 parts of hydroxyl silicone oil and 16.67 parts of boric acid.
And putting the first mixture into a vacuum drying box, vacuumizing, keeping the pressure at-1 MPa and the set temperature at 163 ℃ in the vacuumizing process for 2 hours when the temperature reaches the set temperature, and naturally cooling to obtain the flexible intelligent impact-resistant gel material.
And (3) heating the two-roll rubber mixing mill to 116 ℃, adding the ethylene-vinyl acetate copolymer and 5 parts of the flexible intelligent impact-resistant gel material, and stirring for 2 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
And placing the third mixture into a foaming machine, foaming for 26min at the temperature of 148 ℃, wherein the foaming ratio is 6, and obtaining the first FIAM-EVA material.
And (3) heating a double-roll rubber mixing mill to 116 ℃, adding the ethylene-vinyl acetate copolymer and 10 parts of flexible intelligent impact-resistant gel material, and stirring for 2 hours to uniformly mix the materials to obtain a second mixture.
Adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and banburying for the second time to obtain a third mixture.
And placing the third mixture into a foaming machine, foaming for 26min at the temperature of 148 ℃, wherein the foaming ratio is 10, and obtaining a second FIAM-EVA material.
And (3) heating the two-roll rubber mixing mill to 116 ℃, adding the ethylene-vinyl acetate copolymer and 15 parts of the flexible intelligent impact-resistant gel material, and stirring for 2 hours to uniformly mix the materials to obtain a second mixture.
And adding calcium powder, azodicarbonamide, zinc oxide, stearic acid and dicumyl peroxide into the second mixture, and carrying out secondary banburying to obtain a third mixture.
Wherein, 68 parts of ethylene-vinyl acetate copolymer, 21 parts of calcium powder, 3 parts of azodicarbonamide, 3 parts of zinc oxide, 0.8 part of stearic acid and 1.1 parts of dicumyl peroxide.
And (3) placing the third mixture into a foaming machine, foaming for 26min at the temperature of 148 ℃, wherein the foaming ratio is 15, and thus obtaining a third FIAM-EVA material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material from high to low according to different requirements to obtain the positive gradient material.
And superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and the hardness from low to high to obtain the negative gradient material.
In the positive gradient material or the negative gradient material, the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient type foam buffer material.
A gradient foam buffer material for individual bulletproof equipment is prepared by the preparation method.
In the invention, the parameters of different contents of flexible intelligent impact-resistant gel materials in the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material are as follows:
FIAM-EVA Material FIAM content Expansion ratio Density (g/cm3) Shore hardness
First FIAM-EVA Material 5％ 6 0.05 50
Second FIAM-EVA Material 10％ 10 0.04 40
Third FIAM-EVA Material 15％ 15 0.03 30
Dynamic mechanical property of gradient foam buffer material
As shown in FIG. 3, the loss factor of the FIAM-EVA gradient foam buffer material at different frequencies was measured by a Q800 DMA dynamic mechanical analyzer and compared with the EVA base material. Compared with EVA materials, the FIAM-EVA gradient foam buffer material has higher loss factor and more excellent dynamic mechanical property.
The impact protection performance of the gradient foam cushioning material pair was tested as follows:
a drop weight of 5kg was placed at the same height of 50cm, allowed to freely fall, and then acted on the gradient foam cushion material and the EVA base material, respectively, and the impact protection performance was evaluated by measuring the impact pressure distribution of the drop weight.
Under the same falling height, the surface pressure of the tested object under the protection of the gradient type foam buffer material is only 3.60MPa, and the surface pressure of the tested object under the protection of the EVA material is 6.53 MPa. Therefore, compared with the EVA material, the surface pressure of the tested object under the protection of the gradient foam buffer material is reduced by 45%, which shows that the gradient foam buffer material has better impact protection performance.
In the present invention, in the case of the present invention,
the gradient foam buffer material is a light foam material with the density and hardness attenuated along the thickness direction, and the change of the impedance in the thickness direction can generate obvious attenuation effect on stress waves generated by impact.
The gradient foam buffer material not only has better flexibility, but also shows more excellent dynamic mechanical property than the EVA material.
The gradient foam buffer material can obviously reduce impact pressure and absorb more impact energy, so that the protective performance of individual bulletproof equipment can be greatly improved.
The gradient foam buffer material has very wide application prospect in the buffer damping fields of buffer energy absorption, individual protection and the like.
The above description is not intended to limit the present invention, and it should be finally explained that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments. Those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit of the present invention.

Claims (10)

1. A preparation method of a gradient foam buffer material for individual bulletproof equipment is characterized by comprising the following steps:
preparing a flexible intelligent impact-resistant gel material;
preparing a FIAM-EVA material, namely processing the flexible intelligent impact-resistant gel material and the first composition to obtain FIAM-EVA materials with different densities and different hardnesses;
and preparing a gradient foam buffer material, namely overlapping a plurality of FIAM-EVA materials according to the density and hardness from high to low to obtain the gradient foam buffer material.
2. The method for preparing the gradient foam buffer material for the individual bulletproof equipment according to claim 1, wherein in the step of preparing the flexible intelligent impact-resistant gel material, the preparation of material components comprises:
83.33-94.34 parts of hydroxyl silicone oil and 5.66-16.67 parts of boric acid.
3. The method for preparing the gradient type foam buffer material for the individual bulletproof equipment of claim 2, wherein in the step of preparing the flexible intelligent impact-resistant gel material, the method comprises the following steps:
a dissolving step, namely adding the boric acid and glycerol with the volume 5 times that of the boric acid into a reaction container, starting stirring, setting the temperature of an electric furnace to be 80-84 ℃, continuing stirring for 27-33min when the temperature reaches the set temperature, and keeping the stirring speed at 300 revolutions per minute until the reactants are colorless and transparent, wherein the boric acid is completely dissolved in the glycerol;
a first heating step, adding the hydroxyl silicone oil into the reaction container, starting stirring, setting the temperature of the electric furnace to be 140-148 ℃, continuing stirring when the temperature reaches the set temperature, keeping for 4 hours, then closing stirring, standing for 10 minutes, and pouring out the upper layer liquid in the reaction container, wherein the upper layer liquid is the first mixture;
and a second heating step, namely putting the first mixture into a vacuum drying box, vacuumizing, keeping the temperature at 160-163 ℃, keeping the temperature for 2 hours when the temperature reaches the set temperature, and naturally cooling to obtain the flexible intelligent impact-resistant gel material, wherein the pressure in the vacuumizing process is between-1 MPa and-4 MPa.
4. The method for preparing a gradient foam cushioning material for individual bulletproof equipment according to claim 2, wherein in the step of preparing a FIAM-EVA material, the first composition component comprises:
68-71 parts of ethylene-vinyl acetate copolymer, 17-21 parts of calcium powder, 3-5 parts of azodicarbonamide, 1.5-3 parts of zinc oxide, 0.8-1.1 parts of stearic acid and 0.6-1.1 parts of dicumyl peroxide.
5. The method for preparing the gradient foam buffer material for the individual bulletproof equipment according to claim 4, wherein in the step of preparing the FIAM-EVA material, the flexible intelligent impact-resistant gel material and the first composition are processed by the following steps:
heating a double-roller rubber mixing mill to the temperature of 116 ℃ and 122 ℃, adding the ethylene-vinyl acetate copolymer and 5-15 parts of flexible intelligent impact-resistant gel material, and stirring for 1.5-2h to uniformly mix the materials to obtain a second mixture;
adding the calcium powder, the azodicarbonamide, the zinc oxide, the stearic acid and the dicumyl peroxide into the second mixture, and carrying out secondary banburying to obtain a third mixture;
and (3) placing the third mixture into a foaming machine, and foaming for 13-26min at the temperature of 148-156 ℃ to obtain the FIAM-EVA material.
6. The method for preparing the gradient type foam buffer material for the individual bulletproof equipment of claim 5, wherein in the step of preparing the FIAM-EVA material:
the flexible intelligent impact-resistant gel material is processed with the first composition respectively by using three contents of 5 parts and 10 parts and 15 parts, so that a first FIAM-EVA material, a second FIAM-EVA material and a third FIAM-EVA material with different densities and different hardnesses are obtained.
7. The method for preparing the gradient foam buffer material for the individual bulletproof equipment according to claim 6,
when 5 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 6;
when 10 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 10;
when 15 parts of the flexible intelligent impact-resistant gel material is used, the foaming ratio is 15.
8. The method for preparing the gradient type foam buffer material for the individual bulletproof equipment according to claim 6, wherein in the step of preparing the gradient type foam buffer material:
superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and hardness from high to low to obtain a positive gradient material;
and the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient foam buffer material.
9. The method for preparing the gradient type foam buffer material for the individual bulletproof equipment according to claim 6, wherein in the step of preparing the gradient type foam buffer material:
superposing the first FIAM-EVA material, the second FIAM-EVA material and the third FIAM-EVA material according to the density and the hardness from low to high to obtain a negative gradient material;
and the first FIAM-EVA material and the second FIAM-EVA material, and the second FIAM-EVA material and the third FIAM-EVA material are connected through interface connecting layers to obtain the gradient foam buffer material.
10. A gradient foam buffer material for individual bulletproof equipment, which is characterized by being prepared by the preparation method of the gradient foam buffer material for the individual bulletproof equipment according to claim 9.
CN202210120900.4A 2022-02-09 2022-02-09 Preparation method of gradient type foam buffer material for individual soldier bulletproof equipment and buffer material Pending CN114434721A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105385163A (en) * 2015-12-30 2016-03-09 中物功能材料研究院有限公司 Damping and energy absorbing material and preparation method thereof
US20160288455A1 (en) * 2015-04-01 2016-10-06 Yung-Teng LEE Multi-layered thermoplastic elastomer foam and process for manufacturing the same
CN107163584A (en) * 2017-05-23 2017-09-15 上海市如影科技有限公司 New type gel shape material and preparation method and application
CN107474544A (en) * 2017-08-29 2017-12-15 湖南沃美新材料科技有限公司 A kind of lightweight shear thickening gel and preparation method thereof
CN207006999U (en) * 2017-06-05 2018-02-13 湖南科技大学 A kind of gradient foam of bulletproof halmet
CN109354761A (en) * 2018-10-31 2019-02-19 湖南御邦华安新材料科技有限公司 EVA base cushioning materials and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160288455A1 (en) * 2015-04-01 2016-10-06 Yung-Teng LEE Multi-layered thermoplastic elastomer foam and process for manufacturing the same
CN105385163A (en) * 2015-12-30 2016-03-09 中物功能材料研究院有限公司 Damping and energy absorbing material and preparation method thereof
CN107163584A (en) * 2017-05-23 2017-09-15 上海市如影科技有限公司 New type gel shape material and preparation method and application
CN207006999U (en) * 2017-06-05 2018-02-13 湖南科技大学 A kind of gradient foam of bulletproof halmet
CN107474544A (en) * 2017-08-29 2017-12-15 湖南沃美新材料科技有限公司 A kind of lightweight shear thickening gel and preparation method thereof
CN109354761A (en) * 2018-10-31 2019-02-19 湖南御邦华安新材料科技有限公司 EVA base cushioning materials and preparation method thereof

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