CN113279136B

CN113279136B - Pearl fiber composite thermal insulating flocculus and preparation method thereof

Info

Publication number: CN113279136B
Application number: CN202010101121.0A
Authority: CN
Inventors: 刘训林; 钱晓燕
Original assignee: Likeno Shanghai New Material Technology Co ltd
Current assignee: Likeno Shanghai New Material Technology Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2022-09-23
Anticipated expiration: 2040-02-19
Also published as: CN113279136A

Abstract

The invention provides a pearl fiber composite warming flocculus and a preparation method thereof, wherein the pearl fiber composite warming flocculus comprises a flocculus upper layer, a flocculus lower layer and an air interlayer positioned between the flocculus upper layer and the flocculus lower layer, wherein the flocculus upper layer comprises pearl fibers, antibacterial polyester fibers and low-melting-point fibers; the flocculus lower layer comprises elastic fibers and pearl fibers, and the flocculus upper layer and the flocculus lower layer are integrally welded through heat. The pearl fiber composite insulation flocculus is subjected to hot melting on the upper layer of the flocculus and then is bonded to the lower layer of the flocculus to form an air interlayer, so that the light and thin effect is achieved; the upper layer of the flocculus adopts a flat laying process, and a thin layer is prepared by normal stirring and mixing, so that the hand feeling is good, and the lower layer of the flocculus adopts a vertical laying process, so that the fibers are in a hair shape, and the elasticity of the flocculus is good; the air interlayer is bonded together by the thermal fuse of the upper layer of the flocculus and the lower layer of the flocculus.

Description

Pearl fiber composite thermal insulation flocculus and preparation method thereof

Technical Field

The invention relates to the technical field of warm-keeping flocculus materials, in particular to a pearl fiber composite warm-keeping flocculus and a preparation method thereof.

Background

With the great improvement of national living standard, the pursuit strength of healthy natural life is increased, common fibers are no longer adopted in flocculus, and pearl fiber flocculus materials with health care functions of antibiosis, skin friendliness, negative ions and the like are increasingly accepted by consumers.

As is known, the pearl contains more than ten kinds of amino acids and more than twenty kinds of trace elements, which can effectively prevent skin aging, inhibit melanin synthesis and keep the skin white and fine; in addition, calcium carbonate contained in the pearl has functions of ultraviolet protection and infrared wave emission. The pearl fiber is a novel functional fiber prepared by blending nano pearl powder and cellulose fiber, has the unique skin care function and ultraviolet resistance of pearl, has smooth hand feeling, bright color, plump and mellow cloth cover tissue and excellent moisture absorption performance, is a textile fiber integrating gorgeous, health care and comfort, has the defects of low strength, poor wrinkle resistance and the like, and limits the application space of the pearl fiber.

The warm-keeping flocculus is a main auxiliary material of the garment, mainly plays the roles of cold prevention, warm keeping and the like, and is soft in texture. Most of the traditional thermal wadding sheets with better thermal insulation performance such as wool, down and the like are prepared by mixing synthetic fibers and natural fibers and are obtained by adopting a common tiling process; the defects of easy fluff drilling, easy mildew, easy worm damage and the like exist more or less in the using process. The synthetic warming flocculus made of various fibers can meet various customized requirements and gradually replace natural warming materials.

However, the conventional thermal wadding sheet adopts hollow fibers as main thermal fibers, and can contain a large amount of static air, so that the thermal wadding sheet has the effects of light weight, good air permeability and good thermal insulation performance, and the thermal insulation and resilience indexes are reduced to different degrees along with the reduction of the air degree in use. At present, in pearl fiber high-grade fabrics and T-shirts, it is necessary to design a light, thin and warm-keeping composite flocculus with health care and bacteriostatic effects.

Disclosure of Invention

In view of the above, the invention aims to provide a pearl fiber composite insulation flocculus, which solves the problem that the flocculus supported by pearl fibers is light and thin and is incompatible with insulation by combining a tiling process and an upright net forming technology.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a pearl fiber composite warm keeping flocculus comprises a flocculus upper layer, a flocculus lower layer and an air interlayer positioned between the flocculus upper layer and the flocculus lower layer, wherein the flocculus upper layer comprises pearl fibers, antibacterial polyester fibers and low-melting-point fibers; the flocculus lower layer comprises elastic fibers and pearl fibers, and the flocculus upper layer and the flocculus lower layer are integrally welded through heat. Adopt the tiling technology to carry out the flocculus upper strata of longitudinal arrangement and pile up when adopting the vertical laying technology to carry out the flocculus lower floor of transverse arrangement, be the fibrous fibre of hair form in the flocculus lower floor and the flocculus upper strata back of contacting, because the elastic fiber's of flocculus lower floor part elasticity effect, can form space or gap between flocculus lower floor and the flocculus upper strata, this application promptly the air intermediate layer. The batts are generally only longitudinally aligned by the flat laying process, and the middle layer of the present application is not produced due to the absence of vertical spandex between layers.

Further, the upper layer of the wadding sheet consists of 2-5 layers of first fiber nets; the first fiber web is an upper layer material obtained by mixing pearl fibers, antibacterial polyester fibers and low-melting-point fibers in a certain amount; the upper material layer is carded and laid in a parallel state. Preferably, the upper layer of the batt sheet consists of 3 layers of the first web. The weight of the upper layer of the wadding sheet is 40-80 g/m ² (ii) a The weight of the lower layer of the flocculus is 20-50 g/m ² The weight ratio of the upper flocculus layer to the lower flocculus layer is (0.7-2.5): 1.

further, the lower layer of the batt has a thickness H ₁ The thickness of the intermediate air interlayer is H ₂ And 1/8H ₁ ≤H ₂ ≤1/5H ₁ 。

Further, the low-melting-point fibers in the upper layer of the batt sheet are prepared from the following raw materials in a mass ratio of 1.5: 1, wherein the weight content of the low-melting-point composite fiber in the upper layer of the flocculus sheet is 10-30%, that is, the fineness and the length of the low-melting-point fiber are typically in the ranges above, so that the thermal insulating flocculus sheet can obtain better performance. As another aspect of the present invention, the low melting point fiber may also be selected from the group consisting of polyolefin fiber, copolyamide fiber, copolyester fiber, low melting point corn fiber, and the like.

Furthermore, the upper layer of the wadding sheet consists of the following fibers in parts by weight: 20-40 parts of pearl fiber, 10-30 parts of antibacterial polyester fiber and 30-70 parts of low-melting-point composite fiber; the lower batt layer consists of the following fibers: 60-80 parts of elastic fiber; 20-40 parts of pearl fiber. Preferably, the upper layer of the flake consists of 30 parts of pearl fiber, 20 parts of antibacterial polyester fiber and 50 parts of low-melting-point composite fiber; the lower layer of the flocculus consists of 80 parts of elastic fiber and 20 parts of pearl fiber.

Still further, the elastic fiber is formed by mixing, by mass, 3:1 and elastic polyester fiber.

The invention also provides a preparation method of the pearl fiber composite thermal insulation flocculus, which comprises the following steps:

s1, opening, namely opening the used fiber raw materials by a wool mixer, finely opening and then scattering the fiber raw materials into loose fibers for later use; weighing the pearl fibers according to the mass ratio of the components; antibacterial polyester fiber; the low-melting-point fiber is used as an upper-layer ingredient; weighing elastic fibers; pearl fiber as a lower-layer ingredient:

s2, mixing the pearl fibers, the antibacterial polyester fibers and the low-melting-point fibers by a mixer according to the weight to obtain an upper-layer material; mixing the elastic fiber and the pearl fiber in a mixer according to a proportion to obtain a lower-layer material;

s3, carding and melt-bonding the upper layer material by using a carding machine, laying the upper layer material into a first fiber web in a parallel state, and laying the first fiber web in a cross mode to form a batting upper layer; carding, continuously folding, stacking and extruding the lower layer material into a lower flocculus layer; and the upper layer of the flocculus is arranged on the lower layer of the flocculus, and the composite flocculus with the air interlayer is formed after thermal fusion, and is curled and collected. Preferably, the lapping angle α between the joined first webs is such that 90 ° < α < 150 °.

Further, step S2 includes: s21, calculating the proportion of the pearl fibers in the upper layer of the wadding sheet in the total amount of the antibacterial polyester fibers and the pearl fibers to be X%, and mixing the pearl fibers in the ingredients in the upper layer of the wadding sheet with X% of low-melting-point fibers to obtain a first material; s22, mixing the antibacterial polyester fiber with the balance of the low-melting-point fiber to obtain a second material, and mixing the second material with the first material obtained in the step S21 to obtain an upper-layer material; s23, mixing the elastic fiber and the elastic polyester fiber according to the amount, and then mixing the mixture with the pearl fiber to obtain a lower layer material. For mixing three different fibers, the mixing time is usually prolonged to achieve the effect of uniform mixing, but the damage of the fibers can be caused invisibly, and the performance of the flocculus is influenced; this application is through taking up two kinds less in three kinds of fibre respectively with another kind proportional mixing, later carry out the secondary and mix, and this operation can ensure mixed effect, reduces the fibre damage, and the performance of flocculus is more stable.

Furthermore, the thermal welding temperature in the step S3 is 110 to 120 ℃, and any one of a steam heating mode, a heat conducting oil heating mode and an electric heating mode can be adopted for thermal welding.

Further, the preparation method comprises S4, before the curling is collected, the surface of the composite flocculus is subjected to blanching treatment, fibers standing on the surfaces of the multiple layers of flocculus are blanched, and the surface of the thermal flocculus is subjected to film forming and curling collection. The blanching treatment is prior art and will not be described herein.

Compared with the prior art, the pearl fiber composite thermal insulation flocculus has the following advantages:

(1) the pearl fiber composite thermal flocculus adopts the organic composition of the pearl fiber, the antibacterial polyester fiber and the elastic fiber, and can ensure the far infrared normal emissivity of pearl particles in the pearl fiber in a low-temperature environment through the thermal effect of the flocculus, improve the release amount of trace elements and enhance the skin care and health care effects of the product; meanwhile, the antibacterial polyester fiber can effectively inhibit the breeding and propagation of bacteria and fungi in a comfortable environment.

(2) The pearl fiber composite thermal insulating flocculus disclosed by the invention is flatly laid on the upper layer, so that good hand feeling is achieved; the fibers are in a hair shape by vertically laying the lower layer, and have good rebound resilience and heat retention; the middle air interlayer formed by hot melting can achieve the light and thin effect; meanwhile, by combining the flat laying and the vertical laying, the flocculus has good mechanical strength in the transverse direction and the longitudinal direction, can be freely typeset and cut, and has high utilization rate.

(3) The pearl fiber composite thermal insulating flocculus has smooth and flat surface, does not lose hair, has more aesthetic appearance, and can be widely applied to various fields such as home textile quilt cores, cotton clothes layers, insoles, sanitary core layers and the like.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention in any way. In the drawings:

FIG. 1 is a schematic cross-sectional view of a pearl fiber composite thermal insulating batt of the present invention;

fig. 2 is a flow chart of a production process of the pearl fiber composite thermal insulating flocculus in embodiment 1 of the invention.

Description of reference numerals:

1-upper flake layer, 2-lower flake layer and 3-air interlayer.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the predetermined purpose, the following detailed description of the specific implementation, structure, manufacturing method, steps, features and effects of the pearl fiber composite thermal insulating flocculus and the preparation method thereof according to the present invention will be provided with reference to the accompanying drawings and preferred embodiments.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The reagents and materials described in the examples were all commercially available unless otherwise specified.

As shown in FIG. 1 and FIG. 2, the present invention provides a solid-liquid separation device of 60-130 g/m ² The pearl fiber composite warm keeping flocculus comprises an upper flocculus layer 1, a lower flocculus layer 2 and an air interlayer 3, wherein the upper flocculus layer 1 is composed of 2-5 layers of first fiber webs (the gram weight of each layer of the first fiber web is 8-2)0g/m ² ) Cross lapping and forming; preferably, the upper layer 1 of the batt sheet is composed of three layers of the first web. The weight of the upper layer of the wadding sheet is 40-80 g/m ² (ii) a The weight of the lower layer 2 of the flocculus is 20-50 g/m ² Thickness of H ₁ The weight ratio of the upper layer 1 of the flocculus to the lower layer 2 of the flocculus is (0.7-2.5): 1, the thickness of the air interlayer 3 is H ₂ And 1/8H ₁ ≤H ₂ ≤1/5H ₁ 。

The upper layer 1 of the wadding sheet consists of 20-40 parts by weight of pearl fibers (the length can be 32-50 mm, the fineness is 0.4-2.8 dtex), 10-30 parts by weight of antibacterial polyester fibers (26-30 mm, the fineness is 1.6-1.8 dtex) and 30-70 parts by weight of low-melting-point composite fibers; preferably, the upper layer 1 of the flake consists of 30 parts of pearl fibers, 20 parts of antibacterial polyester fibers and 50 parts of low-melting-point composite fibers, wherein the mass ratio of the low-melting-point composite fibers is 1.5: 1 the low-melting-point polypropylene/polyethylene composite fiber has the fineness of 0.5-12 dtex and the length of 64 mm.

The lower layer 2 of the flocculus is made of 60-80 parts of elastic fiber (the length is 24-50 mm, and the fineness is 2-50 dtex); 20-40 parts of pearl fiber. The lower flocculus layer 2 is composed of 80 parts of elastic fiber and 20 parts of pearl fiber. The elastic fiber is formed by a Shu-Maran silk fiber (the length is 48mm, and the fineness is 1.2-2.0 dtex): elastic polyester fiber (length of 64mm, fineness of 3.3-6.4 dtex) ═ 3: 1.

Example 1 preparation of a Pearl fiber composite thermal flocculus

The preparation method comprises the following steps:

s1, opening the fiber raw materials according to weight: 25% of pearl fiber (length is 32mm, fineness is 0.6dtex)), 10% of antibacterial polyester fiber (length is 26mm, fineness is 1.6dtex), 25% of low-melting-point composite fiber (mass ratio of all is 1.5: 1 composite low-melting-point polypropylene/polyethylene composite fiber with the fineness of 7dtex, the length of 64mm and the melting point of 124 ℃), 40 percent of spandex (30 percent of the spandex fiber is 1.2dtex, the length of 48mm, and 10 percent of spandex fiber is 6.1dtex, and the length of 64mm is elastic polyester fiber); loosening by a wool mixer, fine loosening and then scattering into a loose shape for later use;

s2, weighing the mixed materials according to the mass ratio of the components, and weighing 30 parts of the pearl fibers; 20 parts of antibacterial polyester fiber; 50 parts of low-melting-point composite fiber, and mixing by a mixer to obtain an upper-layer material; weighing the Shu-stretch yarn fiber: the elastic polyester fiber is prepared by the following steps of 3:1, 80 parts of elastic fiber; mixing 20 parts of pearl fiber by a mixer to obtain a lower-layer material:

s3, carding and melt-bonding the mixed upper-layer materials through a carding machine, laying the mixed upper-layer materials into first fiber nets in a parallel state, laying the first fiber nets into 3 layers in a crossed mode, and obtaining an upper layer 1 of the batt sheet, wherein the laying included angle between every two adjacent first fiber nets is 120 degrees;

carding the mixed lower layer material, continuously folding, stacking and extruding into a lower flocculus layer 2, and overlaying the upper flocculus layer 1 on the lower flocculus layer 2; and (3) sending the mixture into a drying oven, heating the upper flocculus layer 1 and the lower flocculus layer 2 to 125 ℃ by using steam, and baking for 7min to enable the fibers in the lower flocculus layer 2 of the low-melting-point composite fiber part in the upper flocculus layer 1 to be combined together to form an air interlayer 3 in the middle.

S4, performing blanching treatment on the surface of the composite flocculus, ironing fibers standing on the surface, forming a film on the surface of the thermal flocculus, cooling at normal temperature, cutting off the edge materials, curling and collecting.

Example 2 preparation of a Pearl fiber composite thermal batt

S1, opening the fiber raw materials according to weight: 20% of pearl fiber (length is 32mm, fineness is 0.4dtex)), 12% of antibacterial polyester fiber (length is 28mm, fineness is 1.8dtex), 30% of low-melting-point composite fiber (mass ratio of 1.5: 1 composite low-melting-point polypropylene/polyethylene composite fiber with the fineness of 5dtex, the length of 61mm and the melting point of 124 ℃), and 38 percent of elastic fiber (30 percent of the elastic fiber is 1.4dtex, the length of 45mm is shu-sha silk fiber, and 10 percent of elastic polyester fiber with the fineness of 4.2dtex and the length of 64 mm); opening and fine opening by a wool mixer, and then scattering into a loose state for later use;

s2, weighing the mixed materials according to the mass ratio of the components, and weighing 20 parts of pearl fibers; 24 parts of antibacterial polyester fiber; 60 parts of low-melting-point composite fiber, mixing the pearl fiber with 45.5% of the low-melting-point composite fiber to obtain a first material, mixing the antibacterial polyester fiber with the balance of the low-melting-point composite fiber to obtain a second material, and mixing the second material with the first material to obtain an upper layer material; mixing the elastic silk fiber and the elastic polyester fiber according to the amount, and then mixing the mixture with the pearl fiber to obtain a lower-layer material.

S3, carding and melt-bonding the mixed upper-layer materials through a carding machine, laying the mixed upper-layer materials into first fiber nets in a parallel state, laying the first fiber nets into 5 layers in a crossed mode, and obtaining an upper layer 1 of the batt sheet, wherein the laying included angle between every two adjacent first fiber nets is 130 degrees;

carding the mixed lower layer material, continuously folding, stacking and extruding into a lower flake layer 2, and overlaying the upper flake layer 1 on the lower flake layer 2; and (3) sending the mixture into a drying oven, heating the upper flocculus layer 1 and the lower flocculus layer 2 to 125 ℃ by using steam, and baking for 7min to enable the fibers in the lower flocculus layer 2 of the low-melting-point composite fiber part in the upper flocculus layer 1 to be combined together to form an air interlayer 3 in the middle.

S4, performing blanching treatment on the surface of the composite flocculus, ironing fibers standing on the surface of the multilayer flocculus, forming a film on the surface of the thermal flocculus, cooling at normal temperature, cutting off scraps, curling and collecting.

Example 3 preparation of Pearl fiber composite thermal flocculus

S1, opening the fiber raw materials according to weight: 35% of pearl fiber (length is 32mm, fineness is 0.6dtex)), 5% of antibacterial polyester fiber (length is 26mm, fineness is 1.6dtex), and 25% of low-melting-point composite fiber (mass ratio of all is 1.5: 1 composite low-melting-point polypropylene/polyethylene composite fiber with the fineness of 7dtex, the length of 64mm and the melting point of 124 ℃), and 35 percent of spandex (30 percent of the spandex fiber is 1.2dtex, the length of the spandex fiber is 48mm, and 10 percent of spandex fiber is 6.1dtex and the length of the spandex fiber is 64 mm); loosening by a wool mixer, fine loosening and then scattering into a loose shape for later use;

s2, weighing the mixed materials according to the mass ratio of each component, and weighing 40 parts of the pearl fiber; 10 parts of antibacterial polyester fiber; 50 parts of low-melting-point composite fiber, namely mixing the pearl fiber with 80% of the low-melting-point composite fiber to obtain a first material; mixing the antibacterial polyester fiber with the balance of the low-melting-point composite fiber to obtain a second material, and mixing the second material with the first material to obtain an upper-layer material; mixing the elastic silk fiber and the elastic polyester fiber according to the amount, and then mixing the mixture with the pearl fiber to obtain a lower-layer material.

S3, carding and melt-bonding the mixed upper-layer materials through a carding machine, laying the mixed upper-layer materials into first fiber nets in a parallel state, laying the first fiber nets into 3 layers in a crossed mode, and obtaining an upper layer 1 of the batt sheet, wherein the laying included angle between every two adjacent first fiber nets is 110 degrees;

carding the mixed lower layer material, continuously folding, stacking and extruding into a lower flocculus layer 2, and overlaying the upper flocculus layer 1 on the lower flocculus layer 1; sending into a baking oven, heating the upper layer 1 and the lower layer 2 of the flocculus to 125 ℃ by steam, baking for 7min, wherein the heating temperature is that the fibers in the lower layer 2 of the flocculus of the low-melting-point composite fiber part in the upper layer 1 of the flocculus are combined together to form a middle air interlayer 3, meanwhile, the molten low-melting-point fibers are uniformly brought into the air interlayer 3 by a hook of a light needling machine, and the minimum distance between adjacent needle holes is 5 mm.

S4, performing blanching treatment on the surface of the composite flocculus, ironing fibers standing on the surface of the flocculus, forming a film on the surface of the thermal flocculus, cooling at normal temperature, cutting off the edge materials, curling and collecting.

Experimental example 1

According to the technical scheme of the application, a plurality of batches of pearl fiber composite insulation flocculus are prepared, classified according to the thickness ratio of the air interlayer 3 to the flocculus lower layer 2, and different types of samples (85 g/m) are measured and counted respectively according to the following method ² ) The thickness and compression rebound resilience of (A) are shown in Table 1.

Measuring the thickness (mm) of the flocculus by using a conventional vernier caliper under a natural non-pressure state;

the samples were tested for their compression resilience according to FZ/T64006 Standard, section 6.10, i.e. 10cm by 10cm (i.e. 100cm area) ² ) Under a light pressure of 0.02kpa, the initial thickness F was measured after 10 seconds ₀ (millimeters); increasing pressure, applying a heavy pressure of 1kpa, and measuring the thickness F under the heavy pressure after 1 minute _h (millimeters); removing pressure, recovering for 1 min, applying light pressure, and measuring recovered thickness F after 10s _r (mm), then compress backElastic modulus (%) - (F) _r -F _h )/(F ₀ -F _h )×100％。

Table 1 effect of thickness ratio of air interlayer to lower layer of flocculus on flocculus performance

As can be seen from the above table, the thickness ratio of the air interlayer 3 to the lower layer 2 of the flocculus can significantly affect the filling power and the compression rebound rate of the pearl fiber composite thermal flocculus; with the increase of the thickness ratio of the air interlayer 3 to the lower layer 2 of the flocculus, the composite flocculus is more fluffy and thinner. When H is ₂ /H ₁ When the compression resilience of the composite flake is higher than 1/5, the compression resilience of the composite flake is reduced rapidly, and the structure of the composite flake is unstable. As shown in Table 1, when 1/8 < H ₂ /H ₁ When the density is less than 1/5, the filling power and compression resilience of the pearl fiber composite thermal insulating flocculus are optimal.

Experimental example 2 comparison of Performance

Comparative example 1: a multi-layer composite down batt was prepared using the protocol of example 1 in application No. 201210144820.9.

Comparative example 2: the preparation method adopts the technical scheme of the embodiment 1, and is different in that the lower layer 2 of the flocculus adopts a flat laying process to form a net.

The composite thermal insulating batts prepared in examples 1-3 and comparative examples 1-2 were measured, three samples per group were measured and averaged, and the measured results of the kr value, the thermal insulating rate, the compression rebound rate and the bulk are shown in table 2.

The insulation performance of the flocculus is tested by using a YG606D type flat-plate fabric heat-preservation instrument according to the standard GB/T11048-2008 determination of thermal resistance and wet resistance of textile physiological comfort under a steady-state condition. Setting the air temperature at 25 ℃, the relative humidity at 65% and the air flow rate at 1m/s, and measuring the heat retention rate and the Crohn value of each flocculus; the samples were tested for bulk according to FZ/T64006 Standard, 6.10, i.e. 10cm x 10cm (i.e. 100cm area) ² ) The sample (2) was pressurized at a pressure of 0.02kpa, and the initial thickness F was measured after 10 seconds ₀ (mm) and are calledThe sample weight m (accurate to 0.001g) was measured and the bulk value (cm) was calculated ³ /g)＝10×F ₀ /m。

TABLE 2 comparison of Performance parameters of different samples

Sample source	Crohn's value, clo	Retention rate%	A compression rebound rate%	Thickness, mm	Bulk, cm ³ /g
						Example 1	1.96±0.26	92±2.2	90±2.1	4.8±0.17	180±8.9
Example 2	1.97±0.12	95±1.6	89±1.5	4.6±0.14	170±4.8
						Example 3	1.93±0.12	94±1.7	91±1.6	4.9±0.13	192±5.6
Comparative example 1	1.91±0.21	86±1.8	76±1.8	4.0±0.15	152±6.1
						Comparative example 2	1.62±0.28	95±2.3	88±2.2	3.5±0.18	132±9.1

In conclusion, the pearl fiber composite insulation flocculus produced by the preparation process disclosed by the invention uses the pearl fiber on the insulation flocculus, active ingredients in the pearl fiber can be stably released through the good heat preservation performance of the insulation flocculus, and meanwhile, the biological active ingredients existing in the pearl fiber are more prone to breeding bacteria when being soaked under sweat, so that a certain amount of antibacterial polyester fiber is added into the upper layer 1 of the flocculus to effectively inhibit bacteria; the upper layer is prepared into the upper layer 1 of the wadding sheet through a flat paving process, so that the upper layer has good hand feeling; the lower layer 2 of the flocculus takes elastic fiber as a main material, and is vertically paved by continuous folding, piling and extruding to ensure that the thermal flocculus has good elasticity, and a certain amount of pearl fiber is added to ensure the sustained release of active ingredients; the air interlayer 3 is formed in the middle, and the pearl fiber is still light and thin, so that raw materials are saved, and the production cost is reduced; the composite thermal insulating flocculus combines the flat laying and vertical laying processes, so that the flocculus has good mechanical strength in different directions; most of the low-melting-point fibers are fixed with other fiber components in the upper layer 1 of the flocculus after being heated, and meanwhile, part of the low-melting-point fiber components can be adhered and fixed with the fiber components in the lower layer 2 of the flocculus, so that the air interlayer 3 has certain strength; in addition, the low-melting-point fibers enter the air interlayer 3 by utilizing the low-density needled hair hooks, so that the effects of shaping and effectively controlling the thickness of the air interlayer 3 are achieved; furthermore, the weight ratio of the upper flocculus layer 1 to the lower flocculus layer 2 is controlled, so that the thickness of the air interlayer 3 is 1/8-1/5 of the thickness of the lower flocculus layer 2, and the light weight, the thinness and the resilience performance of the composite flocculus are both considered.

The present invention is not limited to the above-described preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The pearl fiber composite warm keeping flocculus is characterized by comprising an upper flocculus layer (1), a lower flocculus layer (2) and an air interlayer (3) positioned between the upper flocculus layer (1) and the lower flocculus layer (2), wherein the upper flocculus layer (1) comprises pearl fibers, antibacterial polyester fibers and low-melting-point fibers; the lower flocculus layer (2) comprises elastic fibers and pearl fibers, and the upper flocculus layer (1) and the lower flocculus layer (2) are integrally welded through heat; the weight of the upper layer (1) of the wadding sheet is 40-80 g/m ² (ii) a The weight of the flocculus lower layer (2) is 20-50 g/m ² The weight ratio of the upper flocculus layer (1) to the lower flocculus layer (2) is 0.7: 1-2.5: 1, the thickness of the flocculus lower layer (2) is H ₁ The thickness of the middle air interlayer (3) is H ₂ And 1/8H ₁ ≤H ₂ ≤1/5H ₁ The preparation method comprises the following steps:

s1, opening, namely opening the used fiber raw materials by a wool mixing machine and finely opening the fiber raw materials for later use; weighing the pearl fibers according to the mass ratio of the components; antibacterial polyester fiber; the low-melting-point fiber is used as an upper-layer ingredient; weighing elastic fibers; the pearl fiber is used as the lower layer ingredient:

s2, mixing the pearl fibers, the antibacterial polyester fibers and the low-melting-point fibers in a certain amount to obtain an upper-layer material; mixing elastic fiber and pearl fiber in proportion to obtain a lower-layer material;

step S2 includes:

s21, calculating the proportion of the pearl fibers in the upper layer of the wadding sheet in the total amount of the antibacterial polyester fibers and the pearl fibers to be X%, and mixing the pearl fibers in the ingredients in the upper layer of the wadding sheet with X% of low-melting-point fibers to obtain a first material;

s22, mixing the antibacterial polyester fiber with the balance of the low-melting-point fiber to obtain a second material, and mixing the second material with the first material obtained in the step S21 to obtain an upper-layer material;

s23, mixing the elastic silk fiber and the elastic polyester fiber according to the quantity, and then mixing the mixture with the pearl fiber to obtain a lower-layer material;

s3, carding and melt-bonding the upper layer materials, laying the upper layer materials into a first fiber web in a parallel state, and laying the first fiber web in a cross mode to form a batting upper layer (1), wherein the lapping angle alpha between the first fiber webs is connected, and the alpha is more than 90 degrees and less than 150 degrees; the lower layer material is carded, continuously folded, stacked and extruded into a lower flocculus layer (2); and the upper layer (1) of the flocculus is arranged on the lower layer (2) of the flocculus, and the composite flocculus with the air interlayer (3) is formed after thermal fusion, curled and collected.

2. The pearl fiber composite thermal flocculus according to claim 1, wherein the upper layer (1) of the flocculus is composed of 2-5 layers of first fiber webs, wherein the first fiber webs are obtained by mixing pearl fibers, antibacterial polyester fibers and low-melting-point fibers in quantity to obtain an upper layer material; the upper material layer is carded and laid in a parallel state.

3. The pearl fiber composite thermal flocculus according to claim 1, wherein the mass ratio of the low-melting-point fibers in the upper layer (1) of the flocculus is 1.5: 1 low-melting-point composite fiber consisting of low-melting-point polypropylene and polyethylene, wherein the weight content of the low-melting-point composite fiber in the batt sheet upper layer (1) is 10-30%.

4. The pearl fiber composite thermal flocculus according to any one of claims 1 to 3, wherein the upper layer (1) of the flocculus consists of the following fibers in parts by weight: 20-40 parts of pearl fiber, 10-30 parts of antibacterial polyester fiber and 30-70 parts of low-melting-point composite fiber; the lower flocculus layer (2) consists of the following fibers: 60-80 parts of elastic fiber; 20-40 parts of pearl fiber.

5. The pearl fiber composite thermal insulation flocculus according to claim 4, wherein the elastic fiber is formed by mixing a soft and elastic silk fiber with a mass ratio of 3: 1: elastic polyester fiber.

6. The method for preparing the pearl fiber composite thermal flocculus according to claim 1, wherein the thermal welding temperature in the step S3 is 110-150 ℃.

7. The method for preparing the pearl fiber composite insulation flocculus according to claim 6, wherein the method further comprises S4, before the curling is collected, the surface of the composite flocculus is subjected to a blanching treatment, fibers standing on the surface of the multilayer flocculus are blanched, and the surface of the insulation flocculus is subjected to film forming and curling collection.