CN112080851A

CN112080851A - Heat-insulating felt and manufacturing method and production equipment thereof

Info

Publication number: CN112080851A
Application number: CN202010896714.0A
Authority: CN
Inventors: 王春喆
Original assignee: Jingfang Environmental Technology Beijing Co ltd
Current assignee: Jingfang Environmental Technology Beijing Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-15

Abstract

Discloses a heat preservation felt and a manufacturing method and production equipment thereof. And mixing the binder in the regenerated fibers to obtain a mixed material. And laying the mixed material into a fiber web. And heating and pressurizing the fiber web to obtain the heat preservation felt. Therefore, the waste textiles can be recycled, and the renewable, energy-saving and environment-friendly heat-insulating felt with heat-insulating performance and fireproof performance can be prepared.

Description

Heat-insulating felt and manufacturing method and production equipment thereof

Technical Field

The invention relates to a heat-insulating felt, in particular to a waste textile regenerated fiber A-grade and B1-grade fireproof heat-insulating felt and a manufacturing method thereof.

Background

With the development of economy, the construction industry is rapidly developed, in order to respond to the call of national energy conservation and emission reduction, more and more heat insulation materials for maintaining the indoor temperature of a building are researched and put into use, and the heat insulation materials reduce the indoor heat of the building to be emitted outdoors by taking measures for the external protective structure of the building, so that the effects of creating a suitable indoor thermal environment and saving energy are achieved.

However, a fire accident of a building is mostly caused by the combustion of a building heat-insulating material, and besides the recognized human factors, the fire-proof performance of the related building heat-insulating material is poor, so that a certain hidden trouble is hidden in the accident, and the improvement of the fire-proof performance of the building energy-saving heat-insulating material is urgently needed to be researched.

At present, in the aspect of the performance of building heat-insulating materials, the following dilemma exist: materials with good fire resistance, such as inorganic insulation materials, have poor thermal insulation properties; good thermal insulation, usually very soft, very loose materials, which are not good fire protection properties, such as organic thermal insulation. That is, the prior art is difficult to realize both, so that the heat-insulating material has good heat-insulating property and good fireproof property.

Therefore, there is still a need for a thermal insulation material and a method for making the same that can satisfy both fire resistance and thermal insulation.

Disclosure of Invention

The technical problem to be solved by the present disclosure is to provide a method for manufacturing a heat preservation felt, which can utilize waste materials and produce a heat preservation felt with heat preservation performance and fireproof performance.

According to a first aspect of the disclosure, a method for manufacturing a heat preservation felt is provided, which comprises the following steps: mixing a binder in the regenerated fibers to obtain a mixed material; laying the mixed material into a fiber net; and heating and pressurizing the fiber web to obtain the heat preservation felt.

Optionally, the method may further include: and (3) sterilizing, sorting, opening and/or carding the waste textiles to generate regenerated fibers.

Alternatively, the binder may be bicomponent fibers; and/or the step of mixing the binder in the regenerated fibers to obtain a mixed material may further comprise: mixing at least one of fire-proof glue, water repellent and mildew preventive in the regenerated fiber; and/or the regenerated fiber, the bicomponent fiber, the water repellent and the mildew preventive are respectively in parts by weight: 70-80 parts of regenerated fibers, 10-15 parts of bicomponent fibers, 8-15 parts of water repellent and 10-20 parts of mildew preventive.

Optionally, the step of mixing the binder in the regenerated fibers to obtain a mixed material may further include: performing coarse opening on the regenerated fibers; after the bi-component fiber, the fireproof glue, the mildew preventive and the water repellent are added, uniformly mixing in a mixing device; and finely opening the mixed product to obtain a mixed material.

Optionally, after the bicomponent fiber, the fire-proof glue, the mildew-proof agent and the water repellent are added, before the uniform mixing in the mixing device, the method can further comprise the following steps: and detecting metals and rejecting detected metal substances.

Alternatively, the step of subjecting the web to heat and pressure treatment may comprise: conveying the fiber net into hot-pressing bonding equipment under the clamping of an upper metal net belt and a lower metal net belt; and melting the low-melting-point bi-component fibers in the fiber net in hot-pressing bonding equipment under the action of circularly flowing hot air at 100-200 ℃, so that all the fibers are bonded, and forming the heat-insulating felt under the action of 5 tons of pressure.

Optionally, the step of mixing the binder in the regenerated fibers to obtain a mixed material may further include: mixing fire-proof glue and curing agent in the regenerated fiber.

Alternatively, the binder may be a polyacrylate binder; and/or the fire-proof glue can be silicon dioxide aerogel powder; and/or the curing agent may be magnesium oxide.

Optionally, the regenerated fiber, the polyacrylate binder, the silica aerogel powder, and the magnesium oxide may be, in parts by mass: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel powder and 6-8 parts of magnesium oxide.

Optionally, the step of mixing the binder in the regenerated fibers to obtain a mixed material may further include: placing the regenerated fibers in a stirring centrifuge for uniform dispersion; and spraying the binder, the fireproof glue and the curing agent onto the surface of the regenerated fiber by spraying under the working state of the stirring centrifuge so as to uniformly coat the regenerated fiber to obtain a mixed material.

Alternatively, the step of subjecting the web to heat and pressure treatment may comprise: conveying the fiber net into a drying and baking device under the clamping of an upper metal net belt and a lower metal net belt; drying the fiber web at 70-80 ℃; baking at 200-220 deg.c to fuse and bond the regenerated fiber in the fiber web; and cooling and shaping at 60-70 ℃ and 5-ton pressure to obtain the heat-insulating felt.

Alternatively, the step of laying the mixed material into a fibrous web may comprise: conveying the mixed material to an air-laying device by using air flow; and laying the mixed material into a fiber web by using an air-laying device.

Optionally, a plurality of disorder rollers are arranged in the material collecting bin above the air-laying equipment, and the rotation speeds and/or rotation directions of the disorder rollers are different, so that the mixed material entering the material collecting bin floats and falls; a plurality of air suction nozzles are arranged below the air-laying equipment, and the air suction volume of each air suction nozzle can be adjusted to control the air volume; and a plurality of air suction nozzles horizontally suck out the mixed materials falling in a floating manner so as to be laid into a fiber web.

Alternatively, the step of laying the mixed material into a fibrous web may comprise: opening and carding the mixed material by using opening and carding equipment; and paving the loosened and carded mixed material into a fiber net by using a lapping machine.

Optionally, the step of opening and carding the mixed material by using an opening and carding device may comprise: conveying the mixed material to a coagulating cotton box by using air flow through a closed pipeline; the cotton coagulating box uniformly and quantitatively conveys the mixed materials to opening and carding equipment for opening and carding; and a dust cage of the opening and carding equipment conveys the opened and carded mixed material to a lapping machine according to the thickness requirement.

According to a second aspect of the present disclosure, there is provided a thermal blanket made according to the method of the first aspect

According to a third aspect of the disclosure, a heat preservation felt is provided, which comprises a regenerated fiber, a bi-component fiber, a fire-proof glue, a water repellent and a mildew preventive, wherein the regenerated fiber, the bi-component fiber, the water repellent and the mildew preventive are respectively in parts by weight: 70-80 parts of regenerated fibers, 10-15 parts of bicomponent fibers, 8-15 parts of water repellent and 10-20 parts of mildew preventive.

According to a fourth aspect of the present disclosure, there is provided an insulation blanket, comprising regenerated fibers, a polyacrylate binder, silica aerogel powder, and magnesium oxide, wherein the polyacrylate binder, the silica aerogel powder, and the magnesium oxide coat the regenerated fibers; the regenerated fiber, the polyacrylate adhesive, the silicon dioxide aerogel powder and the magnesium oxide are respectively in parts by weight: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel powder and 6-8 parts of magnesium oxide.

According to a fifth aspect of the present disclosure, there is provided an insulation blanket production apparatus, which may include: the coarse opening equipment is used for performing coarse opening on the regenerated fibers; mixing equipment, adding bi-component fiber, fire-proof glue, mildew-proof agent and water repellent into the coarse and loosened regenerated fiber, and uniformly mixing; fine opening equipment for finely opening the mixed product to obtain a mixed material; the air-laid equipment is used for laying the mixed material into a fiber web; and hot-pressing bonding equipment, under the action of circularly flowing hot air with the temperature of 100-200 ℃, melting the low-melting-point bi-component fibers in the fiber net, so that all the fibers are bonded, and under the action of 5 tons of pressure, forming the heat-insulating felt.

According to a sixth aspect of the present disclosure, there is provided an insulation blanket production apparatus comprising: the stirring centrifuge is used for uniformly dispersing the regenerated fibers, and the polyacrylate adhesive, the silicon dioxide aerogel powder and the magnesium oxide are sprayed on the surface of the regenerated fibers by spraying under the working state of the stirring centrifuge so as to uniformly coat the regenerated fibers; the air-laid equipment is used for laying the mixed material into a fiber web; and drying and baking equipment, drying the fiber web at 70-80 ℃, baking at 200-220 ℃ to melt and bond the regenerated fibers in the fiber web, and cooling and shaping at 60-70 ℃ and 5-ton pressure to obtain the heat-insulating felt.

According to a seventh aspect of the present disclosure, there is provided an insulation blanket production apparatus, which may include: the method comprises the following steps of (1) uniformly dispersing regenerated fibers by a stirring centrifuge, and spraying a polyacrylate binder, silicon dioxide aerogel powder and magnesium oxide onto the surfaces of the regenerated fibers by spraying under the working state of the stirring centrifuge so as to uniformly coat the regenerated fibers to obtain a mixed material; the opening and carding equipment is used for opening and carding the mixed material; a lapping machine, which is used for lapping the loosened and carded mixed material into a fiber net; and drying and baking equipment, drying the fiber web at 70-80 ℃, baking at 200-220 ℃ to melt and bond the regenerated fibers in the fiber web, and cooling and shaping at 60-70 ℃ and 5-ton pressure to obtain the heat-insulating felt.

Therefore, the waste textiles can be recycled, and the novel environment-friendly heat-insulating felt with good heat-insulating performance and fireproof performance is produced.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

FIG. 1 shows a schematic flow diagram of a method of making insulation blanket according to an embodiment of the present disclosure.

Fig. 2 shows a schematic block diagram of a holding mat production facility according to a first embodiment of the present disclosure.

Fig. 3 shows a schematic flow diagram of a method of laying down a mixed material into a fibrous web using an airlaid technique according to an embodiment of the present disclosure.

Fig. 4 is a photograph of a waste textile recycled fiber B1 grade fire-proof insulation blanket according to an embodiment of the disclosure.

Fig. 5 shows a schematic block diagram of a holding mat production apparatus according to a second embodiment of the present disclosure.

Fig. 6 shows a schematic view of the internal structure of the fire-proof insulation blanket according to the second embodiment and the third embodiment of the disclosure.

Fig. 7 shows a schematic flow diagram of a method of heat-pressing a web according to example two and example three of the present disclosure.

Fig. 8 shows a schematic block diagram of a holding mat production apparatus according to a third embodiment of the present disclosure.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Some heat insulation materials on the market at present, such as organic heat insulation materials, have poor fire resistance although the heat conductivity coefficient is low and the heat insulation performance is good, and for example, inorganic heat insulation materials have excellent flame resistance, namely good fire resistance, but poor heat insulation performance.

That is, the existing thermal insulation material or the production method thereof cannot give consideration to both the thermal insulation performance and the fire resistance performance of the thermal insulation material.

The disclosure provides a scheme for manufacturing A-grade and B1-grade fireproof heat-insulation materials by adopting waste textile regenerated fibers.

Regarding the combustion performance of the building material, in national standard GB8624-2012, A level is a non-combustible building material which is a material hardly combusted, B1 level is a non-combustible building material which has a good flame retardant effect, and the non-combustible building material is difficult to ignite in the air or under the action of high temperature and is not easy to spread.

The heat preservation felt provided by the disclosure is made of waste textile regenerated fibers, and the obtained heat preservation felt can reach A level and B1 level respectively, so that the problem that heat preservation and fire prevention are difficult to combine is fundamentally solved.

Waste textiles (solid waste textile), waste textile for short, refer to waste and old unused textiles. Including waste of textile industry, such as leftover bits and pieces of textile factory, waste of domestic textile, such as waste clothes and daily textile. The heat-insulating felt is processed by utilizing the waste textile regenerated fibers, and a renewable, repeatable and recyclable resource comprehensive utilization way is provided.

The insulation blanket making scheme of the present disclosure is described below with reference to fig. 1 to 8.

First, in step S110, the waste textile may be pretreated to obtain regenerated fibers, so as to perform subsequent treatment steps.

For example, waste textiles may be sterilized, sorted, opened, and/or carded to produce regenerated fibers. Here, disinfect waste textile can prevent that the fungus that waste textile carried from infecting the operation personnel, and sort waste textile, can get rid of impurity and foreign matter wherein, can also obtain the textile of different materials/texture for example, and then get rid of and be unfavorable for making the textile that obtains the heat preservation felt to make better quality heat preservation felt.

Generally, the waste textile is mostly transported to a factory/workshop in a form of being pressed into a bale before processing, and the packing density is higher. Therefore, the waste textile can be unpacked firstly, then the waste textile is measured and weighed by an electronic scale and is conveyed to the next process, such as the disinfection, sorting or opening and carding process, through a closed pipeline according to a certain proportion.

Opening the waste textile can loosen the compressed and intertwined fiber raw materials (waste textile) and is convenient for removing the impurities and foreign matters doped in the fiber raw materials, such as zippers, buttons or ornaments made of materials other than textiles, and the like, and then uniformly mixing the fibers and the foreign matters.

The opening quality of the fiber raw material (waste spinning) has certain influence on the quality of semi-finished products and material saving.

An alternative to pre-treating waste textiles to obtain regenerated fibres has been described above. It should be understood that the regenerated fibers useful in the present disclosure may have a variety of sources or modes of preparation.

After the regenerated fiber is obtained, as shown in fig. 1, a binder is mixed with the regenerated fiber at step S120 to obtain a mixed material.

In step S130, the mixed material is laid into a fiber web.

In step S140, the fiber web is heated and pressurized to obtain the heat preservation mat.

Examples of the disclosed embodiments of making insulation blankets using waste textile recycled fibers are further described below.

[ EXAMPLES one ]

In the first embodiment, the B1-grade fireproof heat-preservation felt is manufactured by adopting an air-laid technology and using waste textile regenerated fibers.

The material of the waste textile regenerated fiber B1 grade fireproof heat preservation felt prepared according to the first embodiment comprises the following components:

regenerated fiber of waste textiles, bicomponent fiber, warp-knitted fireproof glue, a water repellent and a mildew preventive.

The mass parts of the materials can be respectively as follows: 70-80 parts of regenerated fibers, 10-15 parts of bicomponent fibers, 8-15 parts of water repellent and 10-20 parts of mildew preventive.

As described above, in step S110, the waste textile is pretreated, for example, by unpacking, sterilizing, sorting, and electronic weighing, to obtain regenerated fiber. The resulting recycled fiber can then be processed using the insulation blanket production equipment shown in fig. 2 to yield a B1 grade fire-blocking insulation blanket.

Fig. 2 shows a schematic block diagram of a holding mat production facility according to a first embodiment of the present disclosure. The insulation blanket production apparatus 200 may include a coarse opening apparatus 210, a mixing apparatus 220, a fine opening apparatus 230, an air-laying apparatus 240, and a thermal compression bonding apparatus 250.

In the present embodiment, the regenerated fibers may be coarsely opened, for example, by a coarse opening device 210, before mixing the binder at step S120.

Thereafter, in this embodiment, in step S120, a binder may be added to the coarse and opened regenerated fibers by using, for example, a mixing device 220, where the binder may be bicomponent fibers.

Bicomponent fibers are composite fibers composed of two polymers that differ in chemical or physical properties, but have the same chemical composition as the polymer. The interface of the two components has a certain adhesion function, and the two components do not peel off in the fiber processing and using processes, so that the fiber product is bonded.

As an alternative, at least one of a fire-proof glue, a water repellent and a mildew preventive can be added into the regenerated fiber, so that the fiber product has the performances of fire prevention, water prevention, mildew prevention and the like.

In this embodiment, in step S120, the bicomponent fiber, the water repellent, and the mildew preventive may be added according to the mass parts of 70 to 80 parts of the regenerated fiber, 10 to 15 parts of the bicomponent fiber, 8 to 15 parts of the water repellent, and 10 to 20 parts of the mildew preventive.

After the bicomponent fiber, the fire-proof glue, the mildew-proof agent and the water repellent are added to the regenerated fiber, the mixture is uniformly mixed in the mixing device 220 to obtain a mixed product.

As a feasible scheme, different materials, such as regenerated fibers, a binding agent and at least one of a water repellent and a mildew preventive, can be weighed by different feed inlets and then mixed according to a preset proportion.

In one embodiment, the mixing device 220 may be provided with a stripping roller at the inlet to break up the materials and make them fall freely, the middle of the mixing box of the mixing device 220 may be provided with two rows of beater rollers composed of four beater rollers to mix the materials evenly and then fall freely, the lower part of the mixing box may be provided with eight wind suction ports to adjust the wind volume. And the sucked material fibers are conveyed to the next flow through a sealed pipeline to finish the material mixing process.

Thereafter, the mixed product may be finely opened, for example, by a fine opening device 230, to obtain a mixed material.

In addition, in step S120, after the bicomponent fiber, the fire-proof glue, the mildew-proof agent, and the water repellent are added, metal detection may be performed and the detected metal substances may be removed before being uniformly mixed in the mixing device.

In this embodiment, after the fine opening and obtaining the mixture, the step S130 is performed, for example, an air-laying device 240 may be used to lay the mixture into a fiber web.

Here, aerodynamics can be used to directly lay down the fibers into a web with efficient random positioning and uniformity by an airlaid device. For example, the mixed material may be conveyed to an air-laying apparatus using air flow, and laid into a fibrous web using the air-laying apparatus.

As an example, fig. 3 shows a schematic flow diagram of a method of laying down a mixed material into a fiber web using an airlaid technique according to an embodiment of the present disclosure.

In this embodiment, as shown in fig. 3, in step S310, a plurality of random rollers are disposed in the collecting bin above the airlaid device, and the rotation speeds and/or rotation directions of the random rollers are different from each other, so that the mixed material entering the collecting bin falls in a floating manner.

In step S320, a plurality of air nozzles are disposed under the airlaid device, and the suction volume of each air nozzle can be adjusted to control the air volume.

In step S330, the plurality of suction nozzles horizontally suck out the mixed materials falling in a floating manner so as to be laid into a fiber web.

The air-laid technology is an advanced technology of non-woven fiber-laid web improved by combining with foreign advanced technology, and can make full use of short fibers with the diameter of more than 2.5 mm.

Therefore, the mixed material is paved into a fiber net by using brand new aerodynamics, and the traditional carding and cross fiber lapping production process is replaced.

Optionally, a novel process pressure control device can be provided to control 150g/m²The uniformity of the low gram weight net layer can lead the tensile strength aspect ratio MD/CD of the non-woven fabric of the fiber net to approach 1 so as to control the performance difference of the fiber net in the longitudinal direction and the transverse direction. In the MD/CD, MD is a machine direction index and CD is a transverse direction index.

After the mixture is laid into a fiber web, the step S140 is performed, for example, by using a hot-press bonding apparatus 250, the fiber web is heated and pressurized to obtain a heat preservation felt.

In this embodiment, in step S140, specifically, the uniformly-laid fiber web may enter a thermal compression bonding apparatus under the clamping of upper and lower metal mesh belts, stable hot air at 100-200 ℃ flows circularly in the thermal compression bonding apparatus, and the low-melting-point bi-component fibers in the fiber web are melted under the action of the circularly flowing hot air at 100-200 ℃ so as to bond the fibers, and then the thermal insulation felt is formed under the action of 5 tons of pressure.

Fig. 4 shows a real photograph of the waste textile recycled fiber B1 grade fire-proof insulation blanket according to the first embodiment.

Thus, the bi-component fiber is used as the adhesive, and the fiber mesh is subjected to hot melting, cooling, shaping and shearing to obtain the heat preservation felt. Thus, the heat preservation felt shown in figure 4 is fluffy and has high porosity due to two opening procedures of coarse opening and fine opening, and the heat preservation performance is improved. And after the fireproof glue is mixed and the process is adopted, the fireproof performance is ensured, and further the multifunctional heat-insulating material with heat preservation, sound insulation, moisture resistance, mildew resistance, ageing resistance and the like can be obtained.

The combustion test of the heat preservation felt obtained in the embodiment can be carried out under the condition that the heat preservation felt is sprayed and burned by a flame spray gun at 800 ℃, the heat preservation felt is difficult to burn, flame penetration is resisted, no toxicity is generated, and the fire-proof grade can reach B1 grade.

[ example two ]

In the second embodiment, the A-grade fireproof heat-preservation felt is manufactured by adopting a coating regeneration fiber and air-laid technology and using the waste textile regeneration fiber.

The material for manufacturing the A-grade fireproof heat-preservation felt by using the waste textile regenerated fibers prepared in the second embodiment comprises the following components:

waste textile regenerated fibers, silicon dioxide aerogel powder, a polyacrylate binder and magnesium oxide (MgO).

The mass parts of the materials can be respectively as follows: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel powder and 6-8 parts of magnesium oxide.

As described above, the waste textile is pretreated in step S110, for example, after unpacking, sterilization, sorting, electronic weighing, opening and/or carding as described above, to obtain regenerated fibers. The resulting recycled fibers can then be processed using insulation blanket manufacturing equipment shown in fig. 5 to produce a class a fire-resistant insulation blanket.

Fig. 5 shows a schematic block diagram of a holding mat production apparatus according to a second embodiment of the present disclosure. The insulation blanket production apparatus 500 includes a stirring centrifuge 510, an air-laying apparatus 240, and a drying and baking apparatus 530.

In this embodiment, as shown in fig. 5, after the regenerated fiber is obtained, the process proceeds to S120, and for example, a binder may be mixed with the regenerated fiber by a stirring centrifuge 510 to obtain a mixture. Here, the binder may be a polyacrylate binder.

In this embodiment, in step S120, while the binder is mixed in the regenerated fiber, a fire-proof glue and a curing agent may be mixed in the regenerated fiber, for example, the fire-proof glue may be silica aerogel powder, and the curing agent may be magnesium oxide.

In this embodiment, the regenerated fiber, the polyacrylate binder, the silica aerogel powder, and the magnesium oxide are, in parts by mass: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel powder and 6-8 parts of magnesium oxide.

In this embodiment, as a possible solution, in step S120, the regenerated fibers may be uniformly dispersed using a stirring centrifuge 510, and the binder, the fire-retardant glue, and the curing agent may be sprayed onto the surface of the regenerated fibers by a spraying device in a state where the stirring centrifuge is operated, so as to uniformly coat the regenerated fibers.

Namely, under the working state of a stirring centrifuge, a polyacrylate adhesive, silica aerogel powder and magnesium oxide are sequentially sprayed on the surface of the regenerated fiber through a spraying device so as to enable the silica aerogel powder to uniformly coat the regenerated fiber to obtain a mixed material, and then the mixed material is conveyed to an air-laid device through air flow.

Proceeding to step S130, the resulting mixed material may be laid into a fibrous web, for example, using an air-laying device 240.

The method of laying the resulting mixture into a fibrous web by means of an air-laying device using aerodynamics may be the same as that described in example one with reference to fig. 3, i.e. steps S310-S330.

Similarly, in this embodiment, as shown in fig. 3, in step S310, a plurality of disorder rollers are disposed in the collecting bin above the airlaid device, and the rotation speeds and/or rotation directions of the disorder rollers are different from each other, so that the mixed material entering the collecting bin falls in a floating manner.

In this embodiment, after the fiber web is obtained in step S130, the process proceeds to step S140, and the fiber web may be heated and pressed by, for example, a drying and baking device 530, so as to obtain a heat preservation felt.

Fig. 7 shows a schematic flow diagram of the heat and pressure treatment of a web according to example two.

As shown in fig. 7, in step S710, the fiber web may be transported into the drying and baking apparatus under the nip of the upper and lower metal mesh belts.

In step S720, the web is dried at 70-80 ℃.

In step S730, the regenerated fibers in the fiber web are fused and bonded by baking at 200-220 ℃.

In step S740, cooling and shaping are carried out at 60-70 ℃ and 5-ton pressure, so as to obtain the heat preservation felt.

Fig. 6 shows a schematic view of the internal structure of the fire-proof thermal insulation blanket according to the second embodiment. As shown in fig. 6, reference numeral 1 (pointing to the honeycomb structure) is silica aerogel powder, and reference numeral 2 (pointing to the short line in the honeycomb structure) is waste textile regenerated fiber, wherein the silica aerogel powder 1 uniformly coats the regenerated fiber 2.

The silicon dioxide aerogel powder is a fireproof material with the lowest heat conductivity coefficient, the lowest density and the highest porosity of the current materials at home and abroad, and the magnesium oxide can be used as a curing agent, can also generate a flame retardant effect, and can also uniformly coat the regenerated fibers with the silicon dioxide aerogel powder. As shown in fig. 6, the silica aerogel powder with excellent fireproof effect uniformly coats the regenerated fiber, so that the final insulation blanket has excellent fireproof effect.

From this, through with the silica aerogel powder cladding regenerated fiber that coefficient of heat conductivity is minimum, the fireproof effect is better, the porosity is higher, can be so that guarantee the heat preservation effect when the fireproof effect is splendid, obtain the A level fire prevention heat preservation felt of waste textile regenerated fiber that has comprehensive properties.

Furthermore, the A-grade fireproof heat-preservation felt made of the waste textile regenerated fibers can be cut and formed according to the required size.

In addition, in the second embodiment, in consideration of the unstable bonding force factor (the regenerated fiber component includes cotton fiber, hemp fiber, chemical fiber, etc.), a bonding agent, such as a polyacrylate bonding agent, is mixed in the regenerated fiber, so that the silica aerogel can be more stably coated on the surface of the regenerated fiber of the waste textile, so as to obtain the class a fireproof performance.

When the binder is mixed in the regenerated fiber to obtain a mixed material, the regenerated fiber is mixed with a fireproof glue and a curing agent, for example, silica aerogel powder is used as the fireproof glue, magnesium oxide is used as the curing agent, and a regenerated fiber coating and air flow net forming technology is used to compound an organic matter and an inorganic matter, namely, the waste textile regenerated fiber heat-insulating felt is compounded with the silica aerogel powder to form an energy-saving green environment-friendly new material with better heat-insulating and sound-insulating properties and fireproof properties.

Therefore, the waste textile regenerated fiber A-grade fireproof heat-preservation felt obtained by the embodiment is reproducible, repeatable, recyclable, energy-saving, green and environment-friendly, heat-preservation (the heat conductivity coefficient can reach 0.028-0.036 w/m.k), sound-insulation, working temperature can reach-200-650 ℃, A-grade fireproof effect can be achieved, and the waste textile regenerated fiber A-grade fireproof felt can also be non-combustible, flame-resistant, smokeless, nontoxic, damp-proof, mildew-proof, moth-resistant and anti-aging.

In a combustion test, the heat-insulating felt obtained in the embodiment is non-combustible, flame-resistant, smokeless and nontoxic, and the fire-proof grade can reach A grade under the condition of being sprayed and burned by a flame spray gun at 1000 ℃.

[ EXAMPLE III ]

In the third embodiment, the grade-A fireproof heat-preservation felt is manufactured by adopting a coating regeneration fiber and opening dust cage lapping technology and using the regeneration fiber of the waste textile.

The material for manufacturing the A-grade fireproof heat-preservation felt by using the regenerated fibers of the waste textiles prepared according to the third embodiment comprises the following components:

The mass parts of the materials can be respectively as follows: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel and 6-8 parts of magnesium oxide.

As described above, the waste textile is pretreated in step S110, for example, after unpacking, sterilization, sorting, electronic weighing, opening and/or carding as described above, to obtain regenerated fibers. The resulting recycled fibers can then be processed using insulation blanket production equipment shown in fig. 8 to produce a class a fire-resistant insulation blanket.

Fig. 8 shows a schematic block diagram of a thermal blanket production apparatus according to the third embodiment. The insulation blanket production apparatus 800 may include a mixer centrifuge 510, an opening carding apparatus 820, a lapping machine 830, and a drying and baking apparatus 530.

The specific operation method and related production equipment of step S120, such as the agitator centrifuge 510, may be substantially the same as those described in the second embodiment.

In this embodiment, as shown in fig. 8, after the regenerated fiber is obtained, the process proceeds to S120, and for example, a binder may be mixed with the regenerated fiber by a stirring centrifuge 510 to obtain a mixture. Here, the binder may be a polyacrylate binder.

As a possible solution, in this embodiment, in step S120, the regenerated fibers may be uniformly dispersed using a stirring centrifuge 510, and the binder, the fire-retardant glue, and the curing agent may be sprayed onto the surface of the regenerated fibers by a spraying device in a state where the stirring centrifuge is operated, so as to uniformly coat the regenerated fibers.

Namely, under the working state of the stirring centrifuge, the polyacrylate binder, the silica aerogel powder and the magnesium oxide are sequentially sprayed on the surface of the regenerated fiber through the spraying equipment, so that the regenerated fiber is uniformly coated by the silica aerogel powder, and the mixed material is obtained.

In this embodiment, before step S130, the mixed material may be subjected to opening carding, for example, using an opening carding device 820.

For example, silica aerogel powder coated regenerated fibers can be transported using an air stream through a closed duct to a condenser box of a carding machine. The coagulating box conveys the regenerated fiber coated with the silicon dioxide aerogel powder uniformly and quantitatively to an opening and carding device, for example, a dust cage of the opening and carding device. The cage of the opening and carding device processes the mixed material according to the thickness requirement, and then conveys the mixed material after opening and carding to the lapping machine 830.

Further, in this embodiment, the opened and carded mixture may be spread into a fiber web, for example, using a spreader 830.

The dust cage in the opening carding equipment is combined with the lapping machine to be lapped into a fiber web, and the configuration of the processing equipment has no requirement on the length of the regenerated fiber, namely, the length is suitable for both the regenerated fiber and the fiber web. The traditional carding machine is matched with a cross lapping machine and is only suitable for lapping medium-length regenerated fibers, and short fibers can be carded in the carding process of the carding machine. Therefore, the lapping method of the present embodiment can make full use of the short fibers.

Then, the process goes to step S140, for example, in this embodiment, the fiber web is heated and pressed by the drying and baking device 530, so as to obtain the heat preservation felt.

The operation method and related production equipment such as the drying and baking equipment 530 in step S140 may be substantially the same as those described with reference to fig. 7 in the second embodiment.

Similarly, as shown in fig. 7, in step S710, the fiber web may be conveyed into the drying and baking apparatus under the nip of the upper and lower metal mesh belts.

In step S720, the web is dried at 70-80 ℃.

The internal structure of the fire-resistant insulation blanket according to the third embodiment may be substantially the same as the internal structure of the fire-resistant insulation blanket according to the second embodiment shown in fig. 6. That is, in the fire-proof insulation mat according to the third embodiment, the silica aerogel powder 1 uniformly coats the regenerated fibers 2 as shown in fig. 6.

Therefore, the embodiment replaces the traditional carding and cross lapping production process by adopting the technology of cladding regenerated fibers and loosening dust cage lapping, and controllable lapping is realized to obtain the fiber web according to the requirements of thickness and density.

In addition, in this embodiment, in consideration of the unstable bonding force factor (the regenerated fiber component includes cotton fiber, hemp fiber, chemical fiber, etc.), a bonding agent, such as a polyacrylate bonding agent, is mixed in the regenerated fiber, so that the silica aerogel powder can be more stably coated on the surface of the regenerated fiber of the waste textile, so as to obtain a-level fireproof performance.

Therefore, when the binder is mixed in the regenerated fiber to obtain a mixed material, the regenerated fiber is mixed with the fireproof glue and the curing agent, for example, silica aerogel powder is used as the fireproof glue, magnesium oxide is used as the curing agent, and the regenerated fiber is coated and the air-laid technology is used to compound organic matters and inorganic matters, namely, the waste textile regenerated fiber heat-insulating felt is compounded with the silica aerogel powder to form the energy-saving green environment-friendly new material with better heat-insulating and sound-insulating properties and fireproof properties.

The waste textile regenerated fiber A-grade fireproof heat-preservation felt obtained by the embodiment is reproducible, repeatable, recyclable, energy-saving, green and environment-friendly, can preserve heat (the heat conductivity coefficient can reach 0.028-0.036 w/m.k), insulate sound, can reach the working temperature of-200-650 ℃, is fireproof, non-combustible, flame-resistant, smokeless and nontoxic, and is damp-proof, mildew-proof, moth-resistant and anti-aging.

In a combustion test, the heat preservation felt obtained in the embodiment is non-combustible, flame-resistant, smokeless and nontoxic, and the fire-proof grade reaches A grade under the condition of being sprayed and burned by a flame spray gun at 1000 ℃.

In an anti-aging test, the heat preservation felt provided by the disclosure is alternated for 35 times within 2.5 hours at 650 ℃ and in-200 environment, the expansion and shrinkage rate is less than 5%, and the heat preservation felt is anti-aging, and the service life is more than 30 years; in the soaking test of alkaline water and saline water, the product is placed in the alkaline water and the saline water for 4 days and 4 nights, and has no size change, no decomposition, no deterioration and no shedding phenomenon.

Therefore, the renewable, repeatable and recyclable waste textile (textile waste) regenerated fiber is utilized to be compounded with the silicon dioxide aerogel powder to achieve A-level fireproof performance and to be compounded with the spun fireproof glue to achieve B1-level fireproof performance, so that the waste textile can be recycled, and the novel energy-saving, green and environment-friendly fireproof heat-insulating material is produced.

The heat-insulating felt obtained by the heat-insulating felt manufacturing method and the production equipment provided by the disclosure can be applied to fire-proof heat-insulating materials for building heat insulation, industrial heat insulation, automobiles, high-speed rails, subways and other scenes.

Therefore, the problem that thermal insulation performance and fire behavior can't compromise can be solved to the heat preservation felt that this disclosure provided.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for manufacturing a heat preservation felt comprises the following steps:

mixing a binder in the regenerated fibers to obtain a mixed material;

laying the mixed material into a fiber net; and

and heating and pressurizing the fiber web to obtain the heat preservation felt.

2. The method of claim 1, further comprising:

and (3) sterilizing, sorting, opening and/or carding the waste textiles to generate the regenerated fibers.

3. The method of claim 1, wherein,

the binder is bicomponent fiber; and/or

The step of mixing the binder in the regenerated fibers to obtain a mixed material further comprises the following steps: mixing at least one of fireproof glue, a water repellent and a mildew preventive in the regenerated fiber; and/or

The regenerated fiber, the bicomponent fiber, the water repellent and the mildew preventive are respectively prepared from the following components in parts by weight: 70-80 parts of regenerated fibers, 10-15 parts of bicomponent fibers, 8-15 parts of water repellent and 10-20 parts of mildew preventive.

4. The method of claim 3, wherein the step of mixing a binder into the regenerated fibers to form a mixed material further comprises:

performing coarse opening on the regenerated fibers;

after the bi-component fiber, the fireproof glue, the mildew preventive and the water repellent are added, uniformly mixing in a mixing device; and

and finely opening the mixed product to obtain the mixed material.

5. The method of claim 4, wherein after adding the bicomponent fiber, the fire-retardant glue, the mold inhibitor, the water repellent, and before uniformly mixing in the mixing device, further comprising:

and detecting metals and rejecting detected metal substances.

6. The method of any of claims 3-5, wherein the step of subjecting the web to heat and pressure comprises:

conveying the fiber mesh into hot-press bonding equipment under the clamping of an upper metal mesh belt and a lower metal mesh belt; and

in the hot-press bonding equipment, under the action of hot air with the temperature of 100-200 ℃ which flows circularly, the low-melting-point bi-component fibers in the fiber net are melted, so that all the fibers are bonded, and then the heat-preservation felt is formed under the action of 5 tons of pressure.

7. The method of claim 1, wherein the step of mixing a binder in the regenerated fibers to obtain a mixed material further comprises:

mixing fire-retardant glue and curing agent in the regenerated fiber, wherein,

the adhesive is a polyacrylate adhesive; and/or

The fireproof glue is silicon dioxide aerogel powder; and/or

The curing agent is magnesium oxide.

8. The method of claim 7, wherein,

the regenerated fiber, the polyacrylate binder, the silicon dioxide aerogel powder and the magnesium oxide are respectively in parts by weight: 70-80 parts of regenerated fibers, 8-16 parts of polyacrylate binder, 10-15 parts of silicon dioxide aerogel powder and 6-8 parts of magnesium oxide.

9. The method of claim 7, wherein the step of mixing a binder in the regenerated fibers to obtain a mixed material further comprises:

uniformly dispersing the regenerated fibers in a stirring centrifuge; and

and spraying a binder, a fireproof adhesive and a curing agent onto the surface of the regenerated fiber by spraying under the working state of a stirring centrifuge so as to uniformly coat the regenerated fiber to obtain the mixed material.

10. The method of any of claims 7-9, wherein the step of subjecting the web to heat and pressure comprises:

conveying the fiber net into drying and baking equipment under the clamping of an upper metal net belt and a lower metal net belt;

drying the fiber web at 70-80 ℃;

baking at 200-220 ℃ to melt and bond the regenerated fibers in the fiber web; and

and cooling and shaping at 60-70 ℃ and 5-ton pressure to obtain the heat-insulating felt.

11. The method of claim 1, wherein the step of laying the mixed material into a fibrous web comprises:

conveying the mixed material to an air-laying device by using air flow; and

the mixed material was laid into a fibrous web using an air-laying apparatus.

12. The method of claim 11, wherein,

a plurality of disorder rollers are arranged in the material collecting bin above the air-laid equipment, and the rotation speeds and/or rotation directions of the disorder rollers are different, so that the mixed material entering the material collecting bin floats and falls;

a plurality of air suction nozzles are arranged below the air-laying equipment, and the air suction volume of each air suction nozzle can be adjusted to control the air volume; and is

The plurality of air suction nozzles horizontally suck out the floating and falling mixed materials so as to be paved into the fiber web.

13. The method of claim 1, wherein the step of laying the mixed material into a fibrous web comprises:

opening and carding the mixed material by using opening and carding equipment; and

and paving the loosened and carded mixed material into a fiber net by using a lapping machine.

14. The method of claim 13, wherein the step of opening carding the mixed material using an opening carding device comprises:

conveying the mixed material to a coagulating cotton box by using air flow through a closed pipeline;

the cotton coagulating box uniformly and quantitatively conveys the mixed material to opening and carding equipment for opening and carding; and

and a dust cage of the opening and carding equipment conveys the opened and carded mixed material to the lapping machine according to the thickness requirement.

15. An insulation blanket made using the method of any one of claims 1 to 14.

16. A heat preservation felt, which comprises regenerated fiber, bi-component fiber, fireproof glue, a water repellent and a mildew preventive, wherein,

17. The heat insulating felt comprises regenerated fiber, polyacrylate adhesive, silica aerogel powder and magnesium oxide, wherein,

the regenerated fiber is coated by a polyacrylate adhesive, silicon dioxide aerogel powder and magnesium oxide; and is

18. An insulation blanket production facility comprising:

the coarse opening equipment is used for performing coarse opening on the regenerated fibers;

mixing equipment, adding bi-component fiber, fire-proof glue, mildew-proof agent and water repellent into the coarse and loosened regenerated fiber, and uniformly mixing;

fine opening equipment for finely opening the mixed product to obtain a mixed material;

an air-laying device for laying the mixed material into a fiber web; and

and the hot-pressing bonding equipment melts the low-melting-point bi-component fibers in the fiber net under the action of hot air with the temperature of 100-200 ℃ which flows circularly, so that the fibers are bonded, and the heat-insulating felt is formed under the action of 5 tons of pressure.

19. An insulation blanket production facility comprising:

the method comprises the following steps of (1) uniformly dispersing regenerated fibers by using a stirring centrifuge, and spraying a polyacrylate binder, silicon dioxide aerogel powder and magnesium oxide onto the surfaces of the regenerated fibers by spraying under the working state of the stirring centrifuge so as to uniformly coat the regenerated fibers to obtain a mixed material;

an air-laying device for laying the mixed material into a fiber web; and

and drying and baking equipment, drying the fiber web at 70-80 ℃, baking at 200-220 ℃ to melt and bond the regenerated fibers in the fiber web, and cooling and shaping at 60-70 ℃ and 5-ton pressure to obtain the heat-insulating felt.

20. An insulation blanket production facility comprising:

the opening and carding equipment is used for opening and carding the mixed material;

a lapping machine, which is used for lapping the loosened and carded mixed material into a fiber net; and