CN114103365A - Lightweight warming functional flocculus and preparation method thereof - Google Patents

Lightweight warming functional flocculus and preparation method thereof Download PDF

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Publication number
CN114103365A
CN114103365A CN202111519074.2A CN202111519074A CN114103365A CN 114103365 A CN114103365 A CN 114103365A CN 202111519074 A CN202111519074 A CN 202111519074A CN 114103365 A CN114103365 A CN 114103365A
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modified polyester
layer
powder
polyester staple
lightweight
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CN114103365B (en
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张伟强
曾国坪
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Xiamen Anta Sports Goods Co Ltd
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Xiamen Anta Sports Goods Co Ltd
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    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/06—Thermally protective, e.g. insulating
    • A41D31/065—Thermally protective, e.g. insulating using layered materials
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • 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
    • B32B5/24—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 one layer being a fibrous or filamentary layer
    • B32B5/26—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 one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
    • 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
    • B32B2250/20—All layers being fibrous or filamentary
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • B32B2437/00—Clothing

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention provides a light warm-keeping functional flocculus, which comprises: a heat storage modified polyester fiber layer; the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer; a polyester fiber layer compounded on the polyimide nanofiber layer; the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers; the modified polyester staple fiber is prepared from the following raw materials: 100 parts of PET slices; 1-5 parts by weight of ZrC powder; TiO 220.1 to 0.9 parts by weight of a powder. Compared with the prior art, the lightweight insulation functional flocculus provided by the invention adopts a specific layer structure and a connection relation, realizes better overall interaction, has excellent insulation function and light weight, and solves the problem of bulky and heavy appearance of cotton clothes in winter. The experimental result shows that the grammage of the lightweight thermal insulation functional flocculus is not more than 100g/m2The compressibility is 83.1-85.3%, the recovery rate is 90.2-90.7%, the Crohn value is 3.13-3.39, the heat storage performance is excellent, the maximum temperature rise value is 7.5-7.8 ℃, and the average temperature rise value is 4.6-4.9 ℃.

Description

Lightweight warming functional flocculus and preparation method thereof
Technical Field
The invention relates to the technical field of clothes, in particular to a lightweight warming functional flocculus and a preparation method thereof.
Background
The filling cotton wadding sheet is a flocculent material formed by stacking short fibers, has a fluffy structure similar to down, can lock static air to achieve the effect of keeping warm, and is widely applied to winter clothes. However, as the wear time increases, the fibrous batt structure is compressed and the lofty structure is gradually compressed and loses its thermal insulation properties, so that the industry has begun to spray functional modified fibers or additives into the batt as compared to conventional fibrous batts.
Research shows that the zirconium carbide ZrC can well absorb the energy of the near infrared ray less than 2 mu m and convert the energy into heat energy. The energy with the wavelength less than 2 μm in the sunlight accounts for more than 95% of the total energy, and the heat radiation wavelength emitted by the human body is about 10 μm and is almost totally reflected, which shows that the zirconium carbide has ideal heat absorption and heat storage characteristics. Meanwhile, electrospinning is a special fiber manufacturing process, and polymer solutions or melts are subjected to jet spinning in a strong electric field. The polyimide nanofiber layer is a nanofiber layer material formed by electrostatic spinning and spray deposition, and has extremely light weight. Meanwhile, the thermal conductivity of the polyimide material is 0.028 close to that of air, is a poor conductor of heat, is widely applied to electronic products, battery interlayers and outer protective layers of aerospace vehicles, and mainly plays a role in heat insulation protection. Therefore, the lightweight and moderate-thickness flocculus material is prepared by adopting the heat storage functional material and the heat insulation functional material, so that the loss of heat of a human body can be effectively blocked, the clothes are not bulky, and the application space of the clothes in winter is wide.
At present, the prior art has a technical scheme of preparing a multilayer structure thermal insulating flocculus by mixing ceramic powder far infrared functional fiber and conventional polyester fiber; on one hand, however, the ceramic powder far infrared functional fiber mainly absorbs far infrared rays to heat up, and the absorbed spectral band is narrow, so that the heating effect is limited; on the other hand, the heat retention performance of the conventional flocculus material mainly depends on the thickness and the unit area weight of the flocculus material, so that the thicker and heavier the flocculus is required to achieve higher heat retention performance, and the clothes made of the flocculus material is bulkier and heavier.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a lightweight thermal functional batt which has an excellent thermal function and is lightweight and solves the problem of bulky and heavy appearance of a cotton clothes product in winter, and a method for manufacturing the lightweight thermal functional batt.
The invention provides a light warm-keeping functional flocculus, which comprises:
a heat storage modified polyester fiber layer;
the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer;
a polyester fiber layer compounded on the polyimide nanofiber layer;
the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers;
the modified polyester staple fiber is prepared from the following raw materials:
100 parts of PET slices;
1-5 parts by weight of ZrC powder;
TiO20.1 to 0.9 parts by weight of a powder.
Preferably, the gram weight of the heat storage modified polyester fiber layer is 35g/m2～50g/m2(ii) a The gram weight of the polyimide nanofiber layer is 10g/m2～20g/m2The thickness is 1 mm-2 mm; the gram weight of the polyester fiber layer is 20g/m2～45g/m2。
Preferably, the breaking strength of the modified polyester staple fiber is 6 cN/dtex-7 cN/dtex, the elongation at break is 18% -24%, the fineness is 1.33 dtex-1.8 dtex, and the length is 35 mm-45 mm.
Preferably, the specification of the ZrC powder is 0.5-2 μm; the TiO is2The average particle diameter of the powder is 0.1-0.5 μm.
Preferably, the preparation method of the modified polyester staple fiber specifically comprises the following steps:
PET slices, ZrC powder and TiO2And after the powder is melted and blended, carrying out spinning treatment to obtain the modified polyester staple fiber.
Preferably, the spinning treatment process specifically comprises:
PET slices, ZrC powder and TiO2The material extruded after the powder is melted and blended is sequentially pressurized, metered, spun, cooled, bundled and oiled, wound, pulled, spread, guided, stretched, heat-set, cooled, oiled, folded, curled steam, curled, relaxed, set and cut to obtain modified polyester staple fiber; the spinning box temperature is 270-300 ℃, and the spinning speed is 1300-1400 m/min.
Preferably, the polyester fiber layer is prepared from polyester staple fibers; the fineness of the polyester staple fiber is 1dtex to 1.5dtex, and the length of the polyester staple fiber is 35mm to 40 mm.
The invention also provides a preparation method of the lightweight thermal insulation functional flocculus, which comprises the following steps:
adopting a parallel-connection type net laying mode, laying modified polyester staple fibers at the lower layer, laying polyester staple fibers at the upper layer, laying a polyimide nanofiber layer as the middle layer, gluing, compounding, drying, cooling, winding and cutting in sequence to obtain the light-weight warm-keeping functional flocculus.
Preferably, the glue used for gluing is acrylic acid polymerization emulsion, and the viscosity is 200 cP-500 cP at 25 ℃; the spraying amount of the sizing is 2g/m2～6g/m2。
Preferably, the drying temperature is 100-160 ℃, and the drying time is 3-15 min; the cooling temperature is 10-30 ℃, and the cooling time is 3-15 min.
The invention provides a light warm-keeping functional flocculus, which comprises: a heat storage modified polyester fiber layer; the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer; a polyester fiber layer compounded on the polyimide nanofiber layer; the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers; the modified polyester staple fiber is prepared from the following raw materials: 100 parts of PET slices; 1-5 parts by weight of ZrC powder; TiO 220.1 to 0.9 parts by weight of a powder. Compared with the prior art, the lightweight insulation functional flocculus provided by the invention adopts a specific layer structure and a connection relation, realizes better overall interaction, has excellent insulation function and light weight, and solves the problem of bulky and heavy appearance of cotton clothes in winter. The experimental result shows that the grammage of the lightweight thermal insulation functional flocculus is not more than 100g/m2The compressibility is 83.1-85.3%, the recovery rate is 90.2-90.7%, the Crohn value is 3.13-3.39, and the heat storage performance is excellent, the maximum heating value is 7.5-7.8 ℃, and the average heating value is 4.6-4.9 ℃.
In addition, the preparation method provided by the invention has the advantages of simple process, mild condition, easiness in control and wide application prospect.
Drawings
Fig. 1 is a schematic structural view of a lightweight thermal insulation functional batt provided in an embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a light warm-keeping functional flocculus, which comprises:
a heat storage modified polyester fiber layer;
the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer;
a polyester fiber layer compounded on the polyimide nanofiber layer;
the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers;
the modified polyester staple fiber is prepared from the following raw materials:
100 parts of PET slices;
1-5 parts by weight of ZrC powder;
TiO20.1 to 0.9 parts by weight of a powder.
In the invention, the lightweight thermal insulation functional flocculus comprises a thermal storage modified polyester fiber layer, a polyimide nanofiber layer and a polyester fiber layer, and preferably consists of a three-layer structure of the thermal storage modified polyester fiber layer, the polyimide nanofiber layer and the polyester fiber layer; the connection relationship of the three can be seen in fig. 1; fig. 1 is a schematic structural view of a lightweight thermal insulation functional batt provided in an embodiment of the invention.
In the present invention, the weight per unit area of the three-layer structure is not more than 50g/m2(ii) a Wherein the gram weight of the heat storage modified polyester fiber layer is preferably 35g/m2～50g/m2More preferably 40g/m2～50g/m2(ii) a The gram weight of the polyimide nanofiber layer is preferably 10g/m2～20g/m2More preferably 14g/m2The thickness is preferably 1mm to 2mm, more preferably 1.3mm to 1.4 mm; the gram weight of the polyester fiber layer is preferably 20g/m2～45g/m2More preferably 25g/m2～40g/m2。
In the present invention, the polyimide nanofiber layer is a nanofiber layer obtained by an electrostatic spinning process, and has an extremely light weight; the present invention is not particularly limited in its origin, and commercially available products known to those skilled in the art may be used.
In the invention, the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers; the modified polyester staple fiber is prepared from the following raw materials:
100 parts of PET slices;
1-5 parts by weight of ZrC powder;
TiO20.1-0.9 parts of powder;
preferably:
100 parts of PET slices;
1-2 parts by weight of ZrC powder;
TiO20.3 to 0.5 part by weight of a powder.
In the invention, the modified polyester short fiber is prepared from PET chips, ZrC powder and TiO2Is prepared from raw materials of powder, preferably PET slice, ZrC powder and TiO2And (3) preparing powder. ZrC and TiO are added into the modified polyester short fiber prepared by the invention2The functional material can convert energy in visible light into heat energy and has excellent heat storage performance.
The invention carries out the treatment on the PET slice, ZrC powder and TiO2The source of the powder is not particularly limited, and commercially available products known to those skilled in the art may be used; wherein ZrC powder and TiO2The purity of the powder is more than 95%.
In the invention, the specification of the ZrC powder is preferably 0.5-2 μm, and more preferably 0.8-1 μm; the TiO is2The average particle diameter of the powder is preferably 0.1 to 0.5. mu.m, more preferably 0.2 to 0.25. mu.m.
In the present invention, the preparation method of the modified polyester staple fiber is preferably specifically:
PET slices, ZrC powder and TiO2And after the powder is melted and blended, carrying out spinning treatment to obtain the modified polyester staple fiber.
In the present invention, before the melt blending, it is preferable to further include:
for PET slice, ZrC powder and TiO2Drying the mixed material of the powder; the drying temperature is preferably 130 ℃ to 145 ℃, more preferably 135 ℃ to 140 ℃.
In the present invention, the melt-blended melt intrinsic viscosity is preferably 0.4dL/g to 1dL/g, more preferably 0.6dL/g to 0.7 dL/g.
In the present invention, the spinning process preferably includes:
PET slices, ZrC powder and TiO2And (3) extruding the powder after melt blending, and sequentially carrying out pressurization, metering, spinning, cooling, bundling and oiling, winding, traction, filament paving, filament guiding, stretching, heat setting, tow cooling, oiling, filament folding, curling steam, curling, relaxation setting and cutting on the extruded material to obtain the modified polyester staple fiber.
In the present invention, the load of the pressurization is preferably 4t/h to 8t/h, more preferably 5.5t/h to 6 t/h.
The metering process is not particularly limited in the present invention, and the technical means in the spinning process known to those skilled in the art can be adopted.
In the invention, the box temperature of the spinning is preferably 270-300 ℃, and more preferably 280-290 ℃; the spinning speed of the spinning is preferably 1300m/min to 1400 m/min.
In the present invention, the pressure of the main cooling duct is preferably 750 to 900Pa, more preferably 800 to 850Pa, and the temperature of the air is preferably 15 to 25 ℃, more preferably 20 to 23 ℃.
In the invention, the oil content of the cluster oiling is preferably 1 wt% to 2 wt%, and more preferably 1.5 wt%.
The process of winding, drawing, spreading, guiding and subsequent folding, curling steam, loosening and shaping and cutting is not particularly limited by the invention, and the technical means in the spinning treatment process known to the skilled person can be adopted.
In the present invention, the stretching ratio of the stretching is preferably 2 to 4, and more preferably 3 to 3.5.
In the present invention, the heat-setting pressure is preferably 15MPa to 25MPa, more preferably 18MPa to 20 MPa.
In the invention, the same treatment mode of cooling in the technical scheme is adopted for cooling the tows.
In the present invention, the oiled oil content is preferably 0.5 wt% to 1 wt%, more preferably 0.8 wt%.
In the present invention, the temperature of the curling is preferably 100 to 150 ℃, more preferably 120 ℃.
Finally, packing to obtain the modified polyester staple fiber. In the present invention, the modified polyester staple fiber preferably has a breaking strength of 6cN/dtex to 7cN/dtex, an elongation at break of 18% to 24%, more preferably 20% to 22%, a fineness of 1.33dtex to 1.8dtex, and a length of 35mm to 45mm, more preferably 38mm to 42 mm.
In the invention, the heat storage modified polyester fiber layer is prepared from the modified polyester short fiber with the heat storage function, so that the flocculus with the excellent heat storage and warm keeping functions can be further obtained.
In the present invention, the polyester fiber layer is preferably made of polyester staple fibers; the source of the polyester staple fibers is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the present invention, the polyester staple fiber preferably has a fineness of 1dtex to 1.5dtex, more preferably 1.3dtex to 1.4dtex, and a length of 35mm to 40mm, more preferably 38 mm.
The lightweight warming functional flocculus adopts a three-layer structure, the inner layer (lower layer) adopts a specific heat storage material, the middle layer adopts a very lightweight polyimide nanofiber layer with low heat conductivity, the heat storage of the inner layer and the heat insulation of the middle layer are achieved, and the prepared flocculus material has light weight and excellent warming performance; in addition, the polyimide nanofiber layer is formed by the nanofiber layer, so that the whole fiber layer is poor in tensile resistance, the polyimide nanofiber layer is used as the middle layer and clamped between the polyester fiber layers to protect the nanofiber layer, and damage in the using process is reduced, so that the advantages of the polyimide nanofiber layer are utilized, and the disadvantages of the polyimide nanofiber layer are avoided.
The invention also provides a preparation method of the lightweight thermal insulation functional flocculus, which comprises the following steps:
adopting a parallel-connection type net laying mode, laying modified polyester staple fibers at the lower layer, laying polyester staple fibers at the upper layer, laying a polyimide nanofiber layer as the middle layer, gluing, compounding, drying, cooling, winding and cutting in sequence to obtain the light-weight warm-keeping functional flocculus.
In the invention, the parallel lapping mode is realized by adopting two parallel lapping machines, wherein one lapping machine is used for laying an upper layer, and the other lapping machine is used for laying a lower layer.
In the present invention, before the lapping, it is preferable to further include processes of weighing, feeding, opening, cotton feeding and carding, in order to pretreat the raw material fiber, and the present invention is not particularly limited thereto.
The invention adopts a parallel lapping form, the lower layer is paved with modified polyester short fibers, the upper layer is paved with polyester short fibers, and the middle layer is a polyimide nanofiber layer; in the present invention, the modified polyester staple fiber, the ester staple fiber, and the polyimide nanofiber layer are the same as those in the above technical solution, and are not described herein again.
After feeding, the invention carries out gluing to realize integral compounding; the glue used for gluing is preferably acrylic acid polymerization emulsion, and the viscosity of the glue at 25 ℃ is preferably 200 cP-500 cP; the source of the acrylic polymer emulsion is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the present invention, the amount of the sizing sprayed is preferably 2g/m2～6g/m2More preferably 4g/m2。
In the invention, the drying temperature is preferably 100-160 ℃, more preferably 145 ℃, and the time is preferably 3-15 min, more preferably 5 min; the cooling temperature is preferably 10-30 ℃, more preferably 18-23 ℃, and the time is preferably 3-15 min, more preferably 5 min.
Finally, obtaining the finished flocculus product through winding and cutting.
The preparation method provided by the invention has the advantages of simple process, mild condition, easiness in control and wide application prospect.
The invention provides a light warm-keeping functional flocculus, which comprises: a heat storage modified polyester fiber layer; the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer; a polyester fiber layer compounded on the polyimide nanofiber layer; the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers; the modified polyester staple fiber is prepared from the following raw materials: 100 parts of PET slices; 1-5 parts by weight of ZrC powder; TiO 220.1 to 0.9 parts by weight of a powder. Compared with the prior art, the lightweight insulation functional flocculus provided by the invention adopts a specific layer structure and a connection relation, realizes better overall interaction, has excellent insulation function and light weight, and solves the problem of bulky and heavy appearance of cotton clothes in winter. The experimental result shows that the grammage of the lightweight thermal insulation functional flocculus is not more than 100g/m2The compressibility is 83.1-85.3%, the recovery rate is 90.2-90.7%, the Crohn value is 3.13-3.39, and the heat storage performance is excellent, the maximum heating value is 7.5-7.8 ℃, and the average heating value is 4.6-4.9 ℃.
In addition, the preparation method provided by the invention has the advantages of simple process, mild condition, easiness in control and wide application prospect.
To further illustrate the present invention, the following examples are provided for illustration. The raw materials used in the following examples of the present invention are all commercially available; wherein, PET section: chemical fiber characterization, white, intrinsic viscosity 0.66, and melting point 260 ℃; ZrC powder: zhongnuo new material, black, purity 99.8%, specification 0.8-1 μm, good No. Zr 52206; TiO 22Powder: dupont Ti-Pure R-103, TiO296 percent of the total weight, 0.23 μm of average particle size and 4.1 of specific gravity;
the heat storage fiber is modified polyester staple fiber, and the production process comprises the following steps:
PET slices and powder additives (based on the weight of the PET slices, the powder additives comprise 1.5 wt% of zirconium carbide ZrC and 0.4 wt% of titanium dioxide TiO)2) Adding into spinning equipment, wherein the production process comprises the following steps: drying (temperature 135-140 ℃) → screw melt extrusion (melt intrinsic viscosity 0.63dL/g) → pressure increase (load 5 ℃)85t/h) → metering → spinning (box temperature 285 ℃, spinning speed 1350m/min) → cooling (main duct pressure 830Pa, wind temperature 20 ℃ to 23 ℃) → cluster oiling (oil content 1.5 wt%) → winding → traction → laying → filament → guide filament → stretching (draw ratio 3.16) → heat setting (pressure 18MPa to 20MPa) → filament bundle cooling → oiling (oil content 0.8 wt%) → stacked filament → crimp steam → crimp (temperature 120 ℃) → relaxation setting → cutting → baling → PET staple fiber;
the performance parameters of the prepared heat storage fiber are as follows:
breaking strength: 6.2 cN/dtex;
elongation at break: 21 percent;
fineness: 1.33dtex to 1.8 dtex;
length: 38 mm-42 mm.
Example 1
The production process of the lightweight warming functional flocculus comprises the following steps:
weighing and feeding → opening → cotton feeding → carding → lapping → feeding → sizing → compounding → drying → cooling → winding → cutting → finished product of flocculus;
adopting two parallel lapping modes, one lapping machine is used for lapping the upper layer, and the other lapping machine is used for lapping the lower layer;
the gram weight of the upper layer wadding sheet is 25-30 g/m2The method adopts conventional polyester fiber short fiber, characterization chemical fiber, a mark YL720, a fineness of 1.33dtex and a length of 38 mm;
the lower layer flocculus has a gram weight of 40-45 g/m2The prepared heat storage fiber (modified polyester short fiber) is 1.33-1.8 dtex in fineness and 38-42 mm in length;
the middle layer is a polyimide nano fiber layer with a gram weight of 14g/m, from Jiangxi Xixian Material nanofiber science and technology Limited21.34mm in thickness;
the glue is acrylic acid polymerization emulsion, milky white liquid, Nippon nanotechnology, model PA-512, solid content 48%, anion type, and viscosity (25 ℃) 200-500 cP; spraying amount of 4g/m2；
Drying temperature: 145 ℃ for 5 min;
cooling temperature: 18-23 ℃ for 5 min.
The gram weight of the prepared lightweight insulation functional flocculus is 80g/m through detection2。
Example 2
The production process of the lightweight warming functional flocculus comprises the following steps:
weighing and feeding → opening → cotton feeding → carding → lapping → feeding → sizing → compounding → drying → cooling → winding → cutting → finished product of flocculus;
adopting two parallel lapping modes, one lapping machine is used for lapping the upper layer, and the other lapping machine is used for lapping the lower layer;
the gram weight of the upper layer wadding sheet is 35-40 g/m2The method adopts conventional polyester fiber short fiber, characterization chemical fiber, a mark YL720, a fineness of 1.33dtex and a length of 38 mm;
the lower layer flocculus has a gram weight of 45-50 g/m2The prepared heat storage fiber (modified polyester short fiber) is 1.33-1.8 dtex in fineness and 38-42 mm in length;
the middle layer is a polyimide nano fiber layer with a gram weight of 14g/m, from Jiangxi Xixian Material nanofiber science and technology Limited21.34mm in thickness;
the glue is acrylic acid polymerization emulsion, milky white liquid, Nippon nanotechnology, model PA-512, solid content 48%, anion type, and viscosity (25 ℃) 200-500 cP; spraying amount of 4g/m2；
Drying temperature: 145 ℃ for 5 min;
cooling temperature: 18-23 ℃ for 5 min.
The gram weight of the prepared lightweight thermal insulation functional flocculus is 100g/m through detection2。
Comparative example 1
The gram weight is 80g/m2Is like ordinary flocculus.
Comparative example 2
The gram weight is 100g/m2Is like ordinary flocculus.
The lightweight thermal insulation functional flocculus provided by the embodiments 1-2 and the common flocculus sample provided by the comparative examples 1-2 are tested for various performances, wherein the compression resilience test method comprises the following steps: FZ/T64003-; method of testing for Crohn's value: GB/T35762 and 2017 textile heat transfer performance test method flat plate method; the heat storage property test method comprises the following steps: G/T18319-2019 textile light and heat storage performance test method; the results are shown in Table 1.
TABLE 1 Performance data for lightweight, warm-keeping functional batts provided in examples 1-2 and for conventional batts provided in comparative examples 1-2
Figure BDA0003408094770000101
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A lightweight, thermal functional batt, comprising:
a heat storage modified polyester fiber layer;
the polyimide nanofiber layer is compounded on the heat storage modified polyester fiber layer;
a polyester fiber layer compounded on the polyimide nanofiber layer;
the heat storage modified polyester fiber layer is prepared from modified polyester staple fibers;
the modified polyester staple fiber is prepared from the following raw materials:
100 parts of PET slices;
1-5 parts by weight of ZrC powder;
TiO20.1 to 0.9 parts by weight of a powder.
2. The lightweight thermal functional batt of claim 1 wherein said thermal storage modified polyester fiber layer has a grammage of 35g/m2～50g/m2(ii) a The gram weight of the polyimide nanofiber layer is 10g/m2～20g/m2The thickness is 1 mm-2 mm; the gram weight of the polyester fiber layer is 20g/m2～45g/m2。
3. The lightweight thermal functional batt of claim 1, wherein said modified polyester staple fiber has a breaking strength of 6cN/dtex to 7cN/dtex, an elongation at break of 18% to 24%, a fineness of 1.33dtex to 1.8dtex, and a length of 35mm to 45 mm.
4. A lightweight thermal functional flocculus according to claim 1, wherein the specification of the ZrC powder is 0.5 μm to 2 μm; the TiO is2The average particle diameter of the powder is 0.1-0.5 μm.
5. The lightweight thermal functional batt of claim 1 wherein the modified polyester staple fiber is prepared by a process comprising:
PET slices, ZrC powder and TiO2And after the powder is melted and blended, carrying out spinning treatment to obtain the modified polyester staple fiber.
6. A lightweight thermal functional batt according to claim 5 wherein said spinning process is carried out by:
PET slices, ZrC powder and TiO2The material extruded after the powder is melted and blended is sequentially pressurized, metered, spun, cooled, bundled and oiled, wound, pulled, spread, guided, stretched, heat-set, cooled, oiled, folded, curled steam, curled, relaxed, set and cut to obtain modified polyester staple fiber; the spinning box temperature is 270-300 ℃, and the spinning speed is 1300-1400 m/min.
7. A lightweight, thermal functional batt of claim 1 wherein said polyester fiber layer is made of polyester staple fibers; the fineness of the polyester staple fiber is 1dtex to 1.5dtex, and the length of the polyester staple fiber is 35mm to 40 mm.
8. A method for preparing a lightweight thermal functional batt according to any of claims 1 to 7, comprising the steps of:
adopting a parallel-connection type net laying mode, laying modified polyester staple fibers at the lower layer, laying polyester staple fibers at the upper layer, laying a polyimide nanofiber layer as the middle layer, gluing, compounding, drying, cooling, winding and cutting in sequence to obtain the light-weight warm-keeping functional flocculus.
9. The preparation method according to claim 8, characterized in that the glue used for sizing is an acrylic acid polymerization emulsion with a viscosity of 200-500 cP at 25 ℃; the spraying amount of the sizing is 2g/m2～6g/m2。
10. The preparation method according to claim 8, wherein the drying temperature is 100-160 ℃ and the drying time is 3-15 min; the cooling temperature is 10-30 ℃, and the cooling time is 3-15 min.
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