CN102815046B - The enhancing heat insulating compound film at a kind of mental core-spun yarn grid interval and uses thereof - Google Patents

Abstract

The invention relates to a reinforced heat-insulating composite film with metal wire core-spun yarn grid intervals and its application. The heat-insulated composite film is a metal-plated polymer composite film with 3 to 20 layers, and there are parallel arrangements or orthogonal weaving between them. A reinforced thermal insulation composite film composed of a metal wire core-spun yarn grid interval lamination. It is characterized in that one side of the reinforced heat insulation composite film can withstand the high or low temperature of -250 ~ 250 ° C, and the other side maintains a normal temperature of 5 ~ 40 ° C. It is a multi-layer composite heat insulation and heat preservation structural material, and its natural thickness is 4 ~ 20mm. The actual compacted thickness is 1-6mm; the square meter mass is 40-600g/m ² , which is a heat-insulating, warm-keeping and soft reinforced heat-insulating composite film that is completely sealed, glued or sewn. It can be used alone or combined with other materials for human body protection and environmental heat insulation in high and low temperature occasions such as firefighting, military affairs, exploration, and industry.

Description

A kind of reinforced heat-insulating composite film with metal wire core-spun yarn grid interval and its application

technical field

The invention relates to the light and thin flexible composite film material technology for heat insulation and protection of human body or environment temperature, in particular to a reinforced heat insulation composite film separated by wire core-spun yarn grids and its composition and preparation technology. The composite heat insulation composite film can be It is suitable for human body protection and environmental heat insulation in special occasions such as fire protection, military affairs, exploration, and industry.

Background technique

Human body protection under temperature field conditions is the most basic content in the research of protective materials. Most of the research and patents of high-performance flexible protective materials also start in general high or low temperature environments, that is, the temperature is between -250 ° C and 250 ° C, such as space Special occasions such as cold and radiant heat environments in the middle, cold or hot environments in activities such as polar or volcanic expeditions, high or low temperature environments in industrial processing workshops, etc.

Due to the good flexibility, light weight and strong composability of membrane structural materials, rigidity can be changed into flexible features, and materials can be used efficiently and in a targeted manner. Therefore, in recent years, new materials and new Technologies and new processes are constantly emerging, and relevant basic and applied basic research has also been carried out, which greatly expands the applicability and use of membrane materials under harsh conditions such as high and low temperatures.

In the past, single-layer polymer films with single and low performance have been replaced by multi-layer or multi-layer composite films. The multi-layer composite film can make full use of the characteristics of each layer, control the role and function of the layers, and make up for their respective shortcomings, so as to obtain the functions and structures required for design or application.

Flexible materials used in high and low temperature environments must first address the ability to withstand high and low temperature conditions (-250°C to 250°C); however, under these harsh conditions, polymer flexible materials are extremely prone to fatigue and damage. When the temperature is high, the material will be thermally degraded, disordered and softened, thereby changing the structure of the material and causing fatigue; when the temperature is low, the material will become brittle and fracture. Therefore, extremely high demands are placed on protective materials in this environment. First, the protective material must be resistant to high and low temperatures; second, it must have good reflection and heat insulation functions; and third, it must maintain its original properties in high and low temperature environments.

In recent years, there have been many patents and researches on flexible heat insulation film materials applied under high and low temperature conditions. In the paper "Multilayer Thermal Insulation Materials and Its Application on Spacecraft" published by Researcher Jiang Jingshan of the China Academy of Space Technology (2000, 30(4)), the multilayer double-sided aluminized polyester film was used to separate The loose fiber products (such as fiber paper, fiber felt, fiber cloth, etc.) and the polyester net are combined to make a multi-layer heat insulation material, which is used as a multi-layer heat insulation material on the surface of the spacecraft to deal with the sunlight on the surface of the spacecraft. High temperature above 200°C and low temperature below -200°C facing away from sunlight. The resulting multi-layer heat insulation material can generally achieve a temperature drop from 23°C to 196°C. Although it has good heat insulation performance, the use temperature range is relatively limited, and it is mainly used in low temperature environments.

Heat insulation composite film (patent application number CN201120138328.1) is bonded and compounded by modified polyethylene or polyester support protection layer, polyurethane first adhesive layer, aluminum film layer, polyurethane second adhesive layer and back protection layer , used as a building insulation material, but the use temperature is limited to about 50 ℃, not suitable for use at low temperature or higher temperature. Environment-friendly thermal insulation composite film (patent application number CN200420021118.4) is composed of kraft paper layer, composite air bubble layer and reflective layer stacked from top to bottom; The air in the bubble layer cannot form convection with the outside air, and the reflective layer can reflect sunlight back, so the composite film has effective radiation protection and heat insulation. This patent is also used as a thermal insulation material for buildings, and is not suitable for use at low temperatures or higher temperatures. The thermal insulation composite film (patent application number CN200920027882.5) is composed of upper and lower surface films and a heat insulation filling film in the middle through bonding or sewing. The surface film can be plastic film, nylon film, rubber film or fiber Products, etc., the heat insulation filling film is a grid film, a sponge film or a floc film, etc. Although it is widely used, its thermal insulation performance is extremely limited.

In the heat insulation film and its preparation method (patent application number CN200910164971.9), the heat insulation film is composed of multiple layers arranged in the same direction, consisting of a polyimide or carbon fiber film base layer and a porous silica airgel layer. The heat insulation unit is bonded and compounded by high-temperature adhesive layers; the obtained heat insulation film can be used for heat insulation under high temperature environment conditions above 300°C. Although the heat insulation film has good high temperature resistance and heat insulation effect, the film is thick and heavy, and there is redundancy for the high temperature condition of 250°C.

The preparation method of mesoscopic flaky vermiculite and heat-resistant polymer heat-insulating composite film (patent application number CN200810039655.4) uses a carbon chain length of 12 to 36 alkyl quaternary ammonium salt compounds to grind vermiculite with a particle size of less than 10 μm After the organic expansion modification, the mesoscale flaky vermiculite was obtained by processing with a high-pressure micro-fluidic homogenizer; the high-temperature-resistant polymer material polyarylethersulfone or polyethersulfoneketone was selected as the continuous phase, and ultrasonically Cell crushing and other methods make the inorganic flaky vermiculite microcrystals evenly dispersed in the organic high molecular polymer material, and it is prepared by dry method and wet method film formation. The thermal conductivity of the obtained product is extremely low (0.038～0.047W/m·K), and it has good heat insulation performance; the obtained composite film can also be tightly wrapped on the surface of fiber fabrics such as polysulfone fibers to improve its resistance to open flames and heat insulation. Properties, particularly thermal insulation, can be used in the outer layers of firefighting or combat clothing for safe entry and exit. In this patent, organic polymer materials are doped with mesoscale inorganic high-temperature-resistant vermiculite materials to prepare high-temperature-resistant polymer insulation composite films. Although they have good thermal insulation performance, their stability and durability in low-temperature environments are not as good There are reports.

Heat-insulating composite film (patent application number CN200510024710.9) is a previous invention patent of the applicant for this patent. It is made of high-strength and low-thermal-conductivity high-polymer base film, high-reflection metal layer, and high-heat-insulation metal oxide layer. The structure compounded with low thermal conductivity thermally bondable high polymer outer covering film realizes efficient, lightweight, flexible and multifunctional thermal protection in high and low temperature environments (-150~120°C). Although the heat-insulating composite film obtained in this patent has good usability in high and low temperature environments, its service temperature range is relatively narrow.

Thermal insulation soft thin composite fabric (patent application number CN200410066650.2) is also the previous invention patent of the applicant of this patent. One side adopts high-performance coated fabric with high and low temperature resistance, and the other side adopts soft, comfortable, anti-frost and anti-frost Condensed coated fabric, in the middle is a composite fabric composed of multi-layer heat-insulating polymer and metal composite film, and a lining fabric with a thickness and a stable size can be provided between the multi-layer composites, so that one side can withstand high temperature, low temperature or high temperature. , low-temperature composite effect, one side maintains a state near room temperature at 5-35°C; the natural thickness of the composite fabric of the invention is 3-12mm, and the square meter mass is 150-550g/m2, which can realize heat insulation under the condition of -120-120°C and protection. Although widely applicable, the heat insulation effect is limited.

It can be seen from the above patented technologies that although some of the existing thermal insulation composite films have certain thermal insulation effects and high and low temperature resistance performance, they have limited ability to withstand high and low temperature conditions at -250 to 250 ° C, and are easily damaged. Fatigue and damage occur. In practical applications, the requirements for light weight, flexibility and high-efficiency protection have been put forward for protective materials in high and low temperature environments.

There are some patents related to metal wire core-spun yarn, such as metal wire core-spun elastic yarn and its manufacturing method (patent application number CN200810004418.4), the core yarn of the core-spun yarn is composed of at least two different fiber yarns (one of which is One is elastic wire, the other is soluble fiber yarn), the outer metal wire wraps the core wire in a spiral shape, and the metal wire is a rigid wire with a diameter of 0.05-0.05mm; the stainless steel wire is made of anti-radiation, anti-static and anti-ultraviolet radiation Metal wire core-spun yarn (patent application number CN200610145088.1) uses stainless steel wire as the core material, and is covered with cotton or viscose fiber or wool fiber on the outside; electromagnetic shielding yarn with metal wire wrapped elastic yarn and its production equipment and production method (Patent Application No. CN201110242817.6) is a patent previously applied by the inventor. The electromagnetic shielding yarn is obtained by using elastic yarn as the core yarn and wrapping the covered yarn section on the outside, wherein the covered yarn section includes a metal wire and a covered yarn Short fiber strands on the outside. However, the technology and application of the wire core-spun yarn as a spacer material have not yet been reported.

Contents of the invention

An object of the present invention is to provide a high and low temperature resistant, light weight, soft metal wire core-spun yarn grid spaced reinforced thermal insulation composite film. Another object of the present invention is to provide a use of the above-mentioned reinforced thermal insulation composite film.

In order to achieve the above purpose, the principle of the present invention is to comprehensively utilize the multi-layer combined structure design of the metallized polymer composite film and the metal wire core-spun yarn to realize heat insulation and protection in high and low temperature environments. Metallized polymer composite film is used to achieve high reflective heat insulation and form low contact heat conduction. The composite film itself is an airtight and airtight material, thereby achieving single-layer heat insulation; it is wrapped with parallel or orthogonally woven metal wires The core yarn grid controls the distance between the metallized polymer composite film layers and forms a static air layer to achieve effective gas heat insulation. The parallel or orthogonally woven metal wire core yarn grid can also enhance the heat in the polymer composite film The rapid diffusion and uniform distribution between them can reduce heat concentration or local overheating. A systematic, efficient, lightweight and flexible heat-insulating composite film system is formed by the multi-layer lamination of metal-coated polymer composite films and parallel or orthogonally woven wire core-spun yarn grids.

A specific technical solution of the present invention is to provide a reinforced thermal insulation composite film with metal wire core-spun yarn grid intervals, which is characterized in that it includes 3 to 20 layers of metal-coated polymer composite films, and two adjacent layers are plated There are metal wire core-spun yarn grids arranged in parallel or orthogonally woven between the metal polymer composite films.

Preferably, it also includes a commonly used fabric for covering on the layer farthest from the high temperature source or low temperature source, and there is also the parallel arrangement or Orthogonal woven wire corespun grid.

Preferably, the common fabric is one of cotton fabric, polyester fabric, or polyester-cotton fabric.

Preferably, the thickness of the metal-coated polymer composite film is 8-60 μm, which is a film coated with a metal coating on the surface of the first polymer base film composed of polyester, polyimide or nylon. The metal coating is an aluminum coating, an aluminum alloy coating or a gold coating.

Preferably, a second polymer base film composed of the same substance as the first polymer base film is covered on the film, and the first polymer base film, the metal coating and the second polymer base film are The basement membrane forms a sandwich structure composite membrane.

Preferably, the metal wire core-spun yarn grid is a core-spun yarn with a metal filament as the core and covered with short fibers, arranged in parallel at a certain distance d and bonded to the metal-coated polymer composite film It is lined between two adjacent layers of metal-coated polymer composite films after orthogonal weaving, and the heat can be quickly diffused along the wire core-spun yarn and evenly distributed between two adjacent layers of metal-coated polymer composite films The distance d is 1-20 mm; the square meter mass of the spacer layer is 5-30 g/m ² .

Preferably, the metal filament refers to one of stainless steel, copper, steel or aluminum alloy filaments with a thickness of 3-100 μm; the short fiber is flame-retardant cotton, flame-retardant polyester, aramid, or flame-retardant One of the cotton polyester blended fibers.

Preferably, it is formed by multi-layer bonding or sewing, one side can withstand high or low temperature of -250-250°C, and the other side maintains a normal temperature of 5-40°C, completely airtight, heat-insulating, warm-keeping, and soft reinforcement Insulation composite film.

Preferably, the natural thickness of the reinforced thermal insulation composite film is 4-20 mm, the actual compacted thickness is 1-6 mm; the square meter mass is 40-600 g/m ² .

Another technical solution of the present invention is to provide an application of the above-mentioned metal wire core-spun yarn grid spaced reinforced heat insulation composite film, which is characterized in that it can be used alone or combined with other materials for high and low temperature occasions Personal protection and environmental insulation.

The invention aims at the demand and material characteristics of heat protection materials under high and low temperature environment conditions of -250-250°C, and uses multi-layer composite structure design to comprehensively utilize metallized high polymer composite film and metal wire core-spun yarn to prepare heat-insulating function composite Film, and from the material heat reflection and conduction heat insulation, heat diffusion and uniform distribution, and the mechanical stability of the film itself, the flexibility, light weight, high and low temperature resistance and enhanced heat insulation performance of the heat insulation composite film material are solved. optimized combination.

Compared with the prior art, the present invention has the following advantages: 1. The heat-insulating composite film is a multi-layer composite structure with a simple structure; 2. The function is reasonable and complete, and the metal-coated polymer composite film realizes high reflective heat insulation, parallel Arranged or orthogonally woven wire core-spun yarn grids can realize rapid diffusion, uniform distribution and heat insulation of heat between metal-coated polymer composite films, and avoid local overheating; 3. Thermal insulation performance and High and low temperature resistance performance is excellent, and the structure is light and soft, easy to carry, store and transport, fold, compact, easy to use and bend and deform during exercise; The field is wide.

Description of drawings

Fig. 1 is a schematic diagram of the layered structure of the reinforced heat-insulating composite film with metal wire core-spun yarn grid intervals.

In the picture:

1- Metallized polymer composite film, facing high temperature or low temperature environment;

2-wire core-spun yarn grid, 2a-yarn core wire, 2b-core-spun yarn outer covering fiber;

3- Commonly used fabrics;

n - the number of layers of the metal-coated polymer composite film.

Detailed ways

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Combined with the structure level and arrangement shown in Figure 1, the reinforced heat insulation composite film provided by the present invention is a metal-coated polymer composite film 1 with 3 to 20 layers, and there are parallel or regular arrangements between them. Interwoven wire core-spun yarn grids 2 are laminated at intervals to form a reinforced thermal insulation composite film, or the last layer is covered with a commonly used fabric 3 instead of the metal-coated polymer composite film 1 . The heat-insulating composite film is made by bonding or sewing multiple layers, one side can withstand high or low temperature of -250-250°C, and the other side can maintain a normal temperature of 5-40°C.

Wherein, the common fabric 3 is one of cotton fabric, polyester fabric, or polyester-cotton fabric.

The metal-coated polymer composite film 1 has a thickness of 8-60 μm, which is a film coated with a metal coating on the surface of the first polymer base film composed of polyester, polyimide or nylon, and the metal coating is a metal coating. Aluminum layer, aluminum alloy layer or gold plated layer. It is also possible to cover the second high polymer base film with the same substance as the first high polymer base film on the film, and the first high polymer base film, the metal coating and the second high polymer base film The membrane forms a sandwich structure composite membrane.

The metal wire core-spun yarn grid 2 is a core-spun yarn with metal filaments 2a as the core and outer covering short fibers 2b, arranged in parallel at a certain distance d and bonded to the metal-coated polymer composite film 1 Or it is lined between two adjacent layers of metal-coated polymer composite film 1 after orthogonal weaving, and the heat can be quickly diffused along the wire core-spun yarn and evenly distributed on the adjacent two layers of metal-coated polymer composite film 1 The distance d is 1-20 mm; the square meter mass of the spacer layer is 5-30 g/m ² .

Metal filament 2a refers to one of stainless steel, copper, steel or aluminum alloy filaments with a thickness of 3-100 μm; the short fiber 2b is flame-retardant cotton, flame-retardant polyester, aramid fiber, or flame-retardant cotton-polyester blended A type of fiber.

Following specific embodiment 1～4 is to select different metallized high polymer composite film materials, metal wire core-spun yarn core material and outer cladding material and cover fabric, different number of layers, natural thickness, compacted thickness and square meter quality, and different processing and forming techniques, actually prepare the reinforced heat-insulating composite film of the metal wire core-spun yarn grid interval of the present invention, and use the obtained heat-insulated composite film in the composite film under high and low temperature conditions. The surface steady-state temperature is measured and evaluated for appearance. The results are shown in the table below and the following description.

Example 1

Using the layered structure of the reinforced heat-insulating composite film with metal wire core-spun yarn grid intervals of the present invention and the materials and processing technology in the following table, and using the heat-insulating composite film prepared by the present invention, place it at a high temperature of 200 ° C Under the conditions, the measured steady-state temperature of the inner surface of the composite membrane is shown in the Example 1 column of the table below. Actual visual inspection revealed that the surface was intact. This proves that the composite membrane has excellent high temperature resistance.

Example 2

Using the layered structure of the reinforced heat-insulating composite film with metal wire core-spun yarn grid intervals of the present invention and the materials and processing technology in the following table, and using the heat-insulating composite film prepared by the present invention, place it at a high temperature of 250 ° C Under the conditions, the measured steady-state temperature of the inner surface of the composite membrane is shown in the column of Example 2 in the table below. Actual visual inspection revealed that the surface was intact. This proves that the composite membrane has excellent high temperature resistance.

Example 3

Using the hierarchical structure of the reinforced heat-insulating composite film with metal wire core-spun yarn grid intervals of the present invention and the materials and processing technology in the following table, and using the heat-insulating composite film prepared by the present invention, place it at -200 ° C Under low temperature conditions, the measured steady-state temperature of the inner surface of the composite membrane is shown in the column of Example 3 in the table below. Actual visual inspection revealed that the surface was intact. This proves that the composite membrane has excellent low temperature resistance.

Example 4

Using the layered structure of the reinforced heat-insulation composite film with metal wire core-spun yarn grid intervals of the present invention and the materials and processing technology in the following table, and using the heat-insulation composite film prepared by the present invention, place it at -240°C Under low temperature conditions, the measured steady-state temperature of the inner surface of the composite membrane is shown in column 4 of Example 4 in the table below. Actual visual inspection revealed that the surface was intact. This proves that the composite membrane has excellent low temperature resistance.

Composition and actual measurement results of reinforced thermal insulation composite membrane with metal wire core-spun yarn grid spacing

Claims (6)

1. the enhancing heat insulating compound film at a mental core-spun yarn grid interval, it is characterized in that: the plating high polymer complex film (1) comprising 3 ~ 20 layers between adjacent two layers plating high polymer complex film (1), having mental core-spun yarn grid (2) that is arranged in parallel or orthogonal weave;

The thickness of described plating high polymer complex film (1) is 8 ~ 60 μm, and it is the film of the coat of metal on the plated surface of the first high polymer basement membrane be made up of terylene, polyimides or polyamide fibre, and this coat of metal is aluminium coated, alloy plating layer or Gold plated Layer; Described film covers the second high polymer basement membrane that one deck and the first high polymer basement membrane commaterial form again, forms sandwich structure composite membrane by the first high polymer basement membrane, the coat of metal and the second high polymer basement membrane;

Described mental core-spun yarn grid (2) is for core and the covering yarn of outer cladding short fiber (2b) by metal filament (2a), with a determining deviation d through arranged in parallel and be bonded in described plating high polymer complex film (1) upper or through orthogonal weave backsight between adjacent two layers plating high polymer complex film (1), and form heat and can be distributed in the wall between adjacent two layers plating high polymer complex film (1) and reduce heat along mental core-spun yarn rapid diffusion and concentrate or hot-spot play the effect of enhancing; Described spacing d is 1 ~ 20mm; Square metre quality of described wall is at 5 ~ 30g/m ²; Described metal filament (2a) refers to that thickness is the copper of 3 ~ 100 μm, the one in steel or aluminium alloy long filament; Described short fiber (2b) is retardant cotton, flame-resistant terylene, aramid fiber or retardant cotton wash one in blend fibre.

2. the enhancing heat insulating compound film at a kind of mental core-spun yarn grid interval as claimed in claim 1, it is characterized in that: the conventional fabric (3) for capping also comprising the one deck be positioned at farthest away from high temperature source or cold temperature source, same mental core-spun yarn grid (2) having described arranged in parallel or orthogonal weave between conventional fabric (3) and the plating high polymer complex film (1) adjacent with it.

3. the enhancing heat insulating compound film at a kind of mental core-spun yarn grid interval as claimed in claim 2, is characterized in that: described conventional fabric (3) is bafta, one in dacron or polyester-cotton fabric.

4. the enhancing heat insulating compound film at a kind of mental core-spun yarn grid interval as claimed in claim 1, it is characterized in that: by laminated or make formation, one side can bear the high or low temperature effect of-250 ~ 250 DEG C, that one side keeps 5 ~ 40 DEG C of normality temperature, completely airtight, heat insulation, warming, soft enhancing heat insulating compound film.

5. the enhancing heat insulating compound film at a kind of mental core-spun yarn grid interval as claimed in claim 1, is characterized in that: the natural thickness of this enhancing heat insulating compound film is 4 ~ 20mm, and actual compression thickness is 1 ~ 6mm; Square metre quality is at 40 ~ 600g/m ².

6. an application for the enhancing heat insulating compound film at mental core-spun yarn grid interval as claimed in claim 1, is characterized in that: can separately for or be used for the physical protection of high and low temperature occasion with other materials compound and environment heat insulation.