CN111101213B - Preparation method of mattress filler - Google Patents

Preparation method of mattress filler Download PDF

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Publication number
CN111101213B
CN111101213B CN201911386278.6A CN201911386278A CN111101213B CN 111101213 B CN111101213 B CN 111101213B CN 201911386278 A CN201911386278 A CN 201911386278A CN 111101213 B CN111101213 B CN 111101213B
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short
temperature
trilobal
leaves
pet
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CN111101213A (en
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孙晓华
王雪
张元华
钮臧臧
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Jiangsu Hengli Chemical Fiber Co Ltd
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Jiangsu Hengli Chemical Fiber Co Ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
    • A47C27/122—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton with special fibres, such as acrylic thread, coconut, horsehair
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/26—Formation of staple fibres
    • 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
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
    • D02G1/205—After-treatments for fixing crimp or curl

Abstract

The invention relates to a preparation method of mattress fillers, in the process of preparing round parallel composite fibers by PET and PTT according to a short-filament spinning process, the spinneret orifices on a spinneret plate are changed into trilobes with three leaves with unequal length and incomplete equal width from round, circular air blowing is adopted for cooling, the arrangement of the trilobe spinneret orifices on the spinneret plate is controlled to meet certain conditions, short filaments with the length of 100-130 mm and the filament number of 0.8-1.2 dtex are prepared, and short filaments a are obtained; extruding a PET melt from trilobal spinneret orifices on a spinneret plate, wherein the trilobal spinneret orifices are not equal in length and not equal in width, cooling by circular air blowing, and preparing short filaments with the length of 50-70 mm and the filament number of 2.0-6.0 dtex according to a short filament spinning process to obtain short filaments b; and mixing the short filaments a and the short filaments b to prepare the mattress filling. The preparation method of the mattress filler effectively reduces the usage amount of the filler in unit volume and greatly saves cost.

Description

Preparation method of mattress filler
Technical Field
The invention belongs to the technical field of mattress manufacturing, and relates to a preparation method of mattress fillers.
Background
The bedding mainly comprises: the popular beddings in the markets of the pillow core, the bedding, the mattress, the pillow case and the quilt cover … … have main products, and the concept of the integral bedding is that various beddings are combined into a whole set of bedroom design scheme, so that the selection of customers is facilitated. Good sleep can not only make the body fully rest, but also make the brain fully energetic to learn, and fully benefit the life and work of people. Therefore, a good mattress plays a great help role in the life of people.
The mattress needs the filling material, and the filling material is diversified on the mattress market, but current mattress filler quantity is more, greatly increased the cost, and elasticity is uneven.
Therefore, it is very important to develop a method for achieving uniform elasticity with less filler.
Disclosure of Invention
The invention provides a preparation method of mattress fillers, and aims to solve the problem that the cost is greatly increased due to high usage amount of the mattress fillers in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of mattress filler comprises mixing staple a and staple b to obtain mattress filler;
the preparation process of the short silk a is as follows:
in the process of preparing circular parallel composite fibers from PET and PTT according to a short-filament spinning process, changing a spinneret orifice on a spinneret plate from a circle to a trilobal shape, cooling by circular blowing, and controlling the arrangement of the trilobal spinneret orifice on the spinneret plate to meet certain conditions to prepare short filaments with the length of 100-130 mm and the filament number of 0.8-1.2 dtex, so as to obtain short filaments a (a spinning assembly adopted for preparing the trilobal parallel composite fibers is based on a spinning assembly adopted for preparing the circular sheath-core composite fibers by the prior art, and the difference is only in the shape of the spinneret orifice);
trilobal orifices fall into two categories:
the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0: 1.1-1.4: 2.0-2.5, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees;
the length ratio of three leaves of the second type of trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the two long leaves are not equal in length, the width ratio of the corresponding three leaves is 1.5:1:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of the two adjacent leaves is 120 degrees;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the contact surfaces of the PET and the PTT when flowing in the guide holes of the trefoil spinneret holes are parallel to each other (because the apparent viscosities of the PET and the PTT are close in the guide holes of the trefoil spinneret holes, the contact surfaces of the PET and the PTT are approximately flat);
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; in the parameters of the short-yarn spinning process, the temperature of relaxation and heat setting is 70-80 ℃;
the preparation process of the staple b is as follows:
extruding a PET melt from trilobal spinneret orifices on a spinneret plate, cooling by using circular blowing, and preparing short filaments with the length of 50-70 mm and the filament number of 2.0-6.0 dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.1-1.4: 2.0-2.5, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; in the parameters of the short yarn spinning process, the temperature of relaxation heat setting is 100-110 ℃.
The mattress filler is a mixture of short filaments a with the length of 100-130 mm and the filament number of 0.8-1.2 dtex and short filaments b with the length of 50-70 mm and the filament number of 2.0-6.0 dtex;
the short filament a is prepared according to the short filament spinning process, the PET melt and PTT melt are extruded from the trilobal spinneret orifices on the same spinneret plate, in the parallel composite spinning of the invention, the contact surfaces of the PET melt and the PTT melt when flowing in the guide holes of the trilobal spinneret orifices are mutually parallel (the apparent viscosities of the PET melt and the PTT melt are close, the contact surfaces of the PET melt and the PTT melt are approximately planes), and a boundary line is formed between the two different melts, and because the arrangement of the trilobal spinneret orifices on the spinneret plate meets the requirement that' a horizontal line passing through the center of the spinneret plate is taken as a reference line, the center line of the longest leaf of the first trilobal spinneret orifice is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the central line of the shortest leaf of the second trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal, so that monofilaments extruded from different spinneret orifices on the same spinneret plate are different, and the difference is specifically as follows: in the spinning process, the spinning pressure and the melt mass ratio are constant, the mass ratio of the melt in each spinneret hole is the same, but because the included angle between the center line of the longest leaf in the trilobal and the intersection line of different melts in the guide hole is different, the contact surface area of different melts in different monofilaments is different (namely, the trilobal is divided into two parallel parts by an imaginary line, one part corresponds to PET, the other part corresponds to PTT, and the contact surface of the two parts is different in size on the cross section), so that after the fiber is subjected to heat treatment, the fiber has a three-dimensional curling shape due to the difference of the heat shrinkage rates of the PET and the PTT;
short silk b extrudes the PET fuse-element from the trefoil shape spinneret orifice that the trefoil length and width are all inequality on the spinneret, and the center line of the longest leaf of trefoil shape spinneret orifice passes through the centre of a circle, and the directional centre of a circle that deviates from, adopts the circular air-blast to cool off simultaneously, and three leaf cooling conditions are serious asymmetry, unbalance for the fibre is from spouting the back, and the cooling rate of the fuse-element of different positions on the cross section is inconsistent, mainly embodies: during spinning, the cooling air speed is high and is between 2.2 and 3.5m/s, the part close to the air blowing port is cooled earlier and faster, and the part far away from the air blowing port is cooled slower. When one of the trilobes in the trilobe spinneret orifice is facing the cooling wind, the melt of that lobe cools faster, while the rest of the trilobe cools slower. Under the tension of drawing, other parts in the trilobal shape are easier to draw and thin, and the stress is more concentrated, so that a trilobal stress asymmetric structure can be formed on a fiber trefoil cross section, and the fiber with the stress asymmetric structure on the cross section can show three-dimensional curling performance in the heat treatment or drawing process;
because the short silk a and the short silk b prepared by the invention have excellent three-dimensional curling performance, the mattress filler is prepared by mixing the short silk a and the short silk b, the using amount of the filler is reduced, and the aim of uniform elasticity is fulfilled on the basis of improving the fluffiness.
As a preferred technical scheme:
according to the preparation method of the mattress filling material, when the short filament a is prepared, the mass ratio of PET to PTT is 50: 50.
According to the preparation method of the mattress filler, when the short filament a is prepared, the intrinsic viscosity of PET is 0.50-0.58 dL/g, and the temperature of a spinning manifold corresponding to the PET is 280-285 ℃; the intrinsic viscosity of PTT is 0.97-1.15 dL/g, and the temperature of a spinning box body corresponding to PTT is 274-277 ℃; when preparing the staple fiber b, the intrinsic viscosity of PET is 0.60-0.70 dL/g. When preparing the short filaments a, in order to ensure that the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of each trilobal spinneret orifice, the two components need to be ensured to have the same flowing state when extruded from the same spinneret orifice as much as possible, namely the apparent viscosity of a melt is close; the apparent viscosities of PET and PTT can be adjusted through temperature, the invention can be matched with the intrinsic viscosity (0.50-0.58 dL/g) of a PET melt and the intrinsic viscosity (0.97-1.15 dL/g) of a PTT melt by reasonably setting the spinning box temperature and the spinning temperature corresponding to the PET and the PTT, the PET adopts high-temperature melting and low-temperature spinning, and the PTT adopts low-temperature melting and high-temperature spinning, so that the degradation of the PTT can be reduced, although the temperature difference of the two components in the box body is larger, the two components enter the same composite component to carry out heat exchange, the temperature of the PET component is reduced, the temperature of the PTT component is increased, so that the apparent viscosities of the two components extruded from a spinneret orifice are close to the same, and the smooth proceeding of the spinning can be ensured.
In the preparation method of the mattress filler, other parameters of the short yarn spinning process corresponding to the short yarn a are as follows: the spinning temperature is 278-282 ℃, the cooling temperature is 20-25 ℃, the cooling air speed is 0.4-0.6 m/s, the winding speed is 800-1000 m/min, the water bath drafting temperature is 75-80 ℃, the steam drafting temperature is 110-120 ℃, the stretching ratio is 3.0-3.3, and the tension heat setting temperature is 130-140 ℃; other parameters of the short yarn spinning process corresponding to the short yarn b are as follows: the spinning temperature is 280-285 ℃, the cooling temperature is 20-25 ℃, the cooling air speed is 2.2-3.5 m/s, the winding speed is 800-1000 m/min, the water bath drafting temperature is 80-85 ℃, the steam drafting temperature is 120-125 ℃, the stretching ratio is 3.0-3.3, and the tension heat setting temperature is 130-150 ℃.
According to the preparation method of the mattress filler, the short filaments a have a three-dimensional curling shape and consist of a plurality of PET/PTT parallel composite monofilaments with trilobal cross sections, an imaginary line intersecting the trilobal is made, the trilobal is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the staple b has a three-dimensional crimp morphology.
According to the preparation method of the mattress filler, the breaking strength of the short filaments a is more than or equal to 2.8cN/dtex, and the elongation at break is 43.0 +/-3.0%; the breaking strength of the short fiber b is more than or equal to 3.0cN/dtex, and the elongation at break is 40.0 +/-5.0%.
According to the preparation method of the mattress filler, the mass ratio of the short filaments a to the short filaments b is 80: 20-90: 10.
The preparation method of the mattress filler and the filling power V of the mattress filler1＞176cm3Fill power V,/g2＞57cm3(the test standard for bulk is FZ/T52004-1998).
Has the advantages that:
(1) the preparation method of the mattress filler is simple and feasible and is suitable for popularization;
(2) according to the preparation method of the mattress filler, the mattress filler is a mixture of the short filaments a and the short filaments b with excellent three-dimensional curling performance, and the single filaments in the short filaments a and the short filaments b occupy large space and are fluffy, so that the usage amount of the filler in unit volume is effectively reduced, and the cost is greatly saved; on the basis of improving the fluffiness, the purpose of uniform elasticity is realized.
(3) The raw materials of the preparation method of the mattress filler are polyester, so that the mattress filler is more convenient to recycle and has higher environmental protection value.
Drawings
FIGS. 1 and 2 are schematic structural views of two types of trilobal orifices of a spinneret used in the process of preparing short filaments a;
FIG. 3 is a schematic view of the distribution of the two types of trilobal orifices of FIGS. 1 and 2 on the spinneret;
FIG. 4 is a schematic view of the structure of the trilobal orifices of the spinneret used in the process of preparing the staple fibers b;
fig. 5 is a schematic view of the distribution of the trilobal orifices of fig. 4 on the spinneret.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The two types of trilobal spinneret orifices on the spinneret plate and the distribution of the trilobal spinneret orifices on the spinneret plate adopted in the process of preparing the short filaments a are shown in the attached drawings 1-3, the length ratio of the three leaves of the first type of trilobal spinneret orifices is 1.0: 1.1-1.4: 2.0-2.5, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the two long leaves are not equal in length, the width ratio of the corresponding three leaves is 1.5:1:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of the two adjacent leaves is 120 degrees. The trilobal spinneret orifices on the spinneret plate and the distribution of the trilobal spinneret orifices on the spinneret plate adopted in the process of preparing the short filaments b are shown in the attached figures 4-5, the ratio of the length of three leaves of the same trilobal spinneret orifice is 1.0: 1.1-1.4: 2.0-2.5, the ratio of the width of the corresponding three leaves is 1:1:1.5, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest blade of each trilobal spinneret orifice passes through the circle center and points away from the circle center. The drawings in the present application are illustrative only and should not be taken as limiting the invention.
Example 1
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.5dL/g) and PTT (intrinsic viscosity of 0.97dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 100mm and the filament number of 0.8dtex, so as to obtain short filaments a; wherein the temperature of the spinning beam corresponding to PET is 280 ℃, and the temperature of the spinning beam corresponding to PTT is 274 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.2:2.3, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.5:2.3, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 278 ℃, the cooling temperature is 20 ℃, the cooling wind speed is 0.4m/s, the winding speed is 800m/min, the water bath drafting temperature is 75 ℃, the steam drafting temperature is 110 ℃, the stretching ratio is 3, the tension heat setting temperature is 130 ℃, and the relaxation heat setting temperature is 70 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short filament a is 2.8cN/dtex, and the elongation at break is 46%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.6dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 50mm and the filament number of 2dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.1:2.0, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 20 ℃, the cooling wind speed is 2.2m/s, the winding speed is 800m/min, the water bath drafting temperature is 80 ℃, the steam drafting temperature is 120 ℃, the stretching ratio is 3, the tension heat setting temperature is 130 ℃, and the relaxation heat setting temperature is 100 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short silk b is 3cN/dtex, and the elongation at break is 45%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 80:20 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 177cm3Fill power V,/g2Is 59cm3/g。
Example 2
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.52dL/g) and PTT (intrinsic viscosity of 1.01dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 104mm and the filament number of 1.1dtex, namely the short filaments a; wherein the temperature of the spinning beam corresponding to PET is 281 ℃, and the temperature of the spinning beam corresponding to PTT is 274 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.1:2.0, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.7:2.0, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 279 ℃, the cooling temperature is 20 ℃, the cooling air speed is 0.4m/s, the winding speed is 821m/min, the water bath drafting temperature is 76 ℃, the steam drafting temperature is 112 ℃, the stretching multiple is 3, the tension heat setting temperature is 130 ℃, and the relaxation heat setting temperature is 71 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short filament a is 2.8cN/dtex, and the elongation at break is 43.3%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.62dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 51mm and the filament number of 3.7dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.2:2.0, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 21 ℃, the cooling wind speed is 2.3m/s, the winding speed is 871m/min, the water bath drafting temperature is 80 ℃, the steam drafting temperature is 120 ℃, the stretching ratio is 3, the tension heat setting temperature is 137 ℃, and the relaxation heat setting temperature is 100 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short silk b is 3cN/dtex, and the elongation at break is 42.6%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 80:20 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 184cm3Fill power V,/g2Is 60cm3/g。
Example 3
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.52dL/g) and PTT (intrinsic viscosity of 1.05dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 115mm and the filament number of 1.1dtex, so as to obtain short filaments a; wherein the temperature of the spinning beam corresponding to PET is 281 ℃, and the temperature of the spinning beam corresponding to PTT is 275 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.1:2.5, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.6:2.5, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 21 ℃, the cooling wind speed is 0.4m/s, the winding speed is 876m/min, the water bath drafting temperature is 77 ℃, the steam drafting temperature is 113 ℃, the stretching ratio is 3, the tension heat setting temperature is 133 ℃, and the relaxation heat setting temperature is 72 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 2.9cN/dtex, and the breaking elongation is 42.9%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.65dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 51mm and the filament number of 3.8dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.0, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 21 ℃, the cooling air speed is 2.4m/s, the winding speed is 887m/min, the water bath drafting temperature is 80 ℃, the steam drafting temperature is 120 ℃, the stretching ratio is 3.1, the tension heat setting temperature is 139 ℃, and the relaxation heat setting temperature is 100 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short silk b is 3cN/dtex, and the elongation at break is 41.6%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 85:10 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 185cm3Fill power V,/g2Is 62cm3/g。
Example 4
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.53dL/g) and PTT (intrinsic viscosity of 1.08dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 118mm and the filament number of 1.1dtex, so as to obtain short filaments a; wherein the temperature of the spinning beam corresponding to PET is 284 ℃, and the temperature of the spinning beam corresponding to PTT is 276 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.4:2.0, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:2.0:2.5, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 23 ℃, the cooling wind speed is 0.5m/s, the winding speed is 897m/min, the water bath drafting temperature is 77 ℃, the steam drafting temperature is 114 ℃, the stretching ratio is 3.1, the tension heat setting temperature is 134 ℃, and the relaxation heat setting temperature is 76 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 2.9cN/dtex, and the breaking elongation is 42.8%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.65dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 53mm and the filament number of 3.8dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.5, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 281 ℃, the cooling temperature is 22 ℃, the cooling wind speed is 3m/s, the winding speed is 934m/min, the water bath drafting temperature is 83 ℃, the steam drafting temperature is 121 ℃, the stretching ratio is 3.1, the tension heat setting temperature is 141 ℃, and the relaxation heat setting temperature is 103 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short fiber b is 3.1cN/dtex, and the elongation at break is 40.8%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 87:13 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 188cm3Fill power V,/g2Is 63cm3/g。
Example 5
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.54dL/g) and PTT (intrinsic viscosity of 1.12dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 125mm and the filament number of 1.1dtex, namely the short filaments a; wherein the temperature of the spinning beam corresponding to PET is 284 ℃, and the temperature of the spinning beam corresponding to PTT is 276 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.4:2.3, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.8:2.3, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 3.0:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 23 ℃, the cooling wind speed is 0.5m/s, the winding speed is 912m/min, the water bath drafting temperature is 78 ℃, the steam drafting temperature is 115 ℃, the stretching ratio is 3.1, the tension heat setting temperature is 134 ℃, and the relaxation heat setting temperature is 76 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 3cN/dtex, and the elongation at break is 42%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.65dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 57mm and the filament number of 4.2dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.1:2.0, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 3.1:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 282 ℃, the cooling temperature is 23 ℃, the cooling wind speed is 3.1m/s, the winding speed is 945m/min, the water bath drafting temperature is 83 ℃, the steam drafting temperature is 122 ℃, the stretching multiple is 3.1, the tension heat setting temperature is 144 ℃, and the relaxation heat setting temperature is 105 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short fiber b is 3.1cN/dtex, and the elongation at break is 40.7%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 90:10 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 188cm3Fill power V,/g2Is 64cm3/g。
Example 6
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.55dL/g) and PTT (intrinsic viscosity of 1.13dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 127mm and the filament number of 1.1dtex, so as to obtain short filaments a; wherein the temperature of the spinning beam corresponding to PET is 284 ℃, and the temperature of the spinning beam corresponding to PTT is 277 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.4:2.5, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.2:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.7:2.5, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 3.2:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 280 ℃, the cooling temperature is 24 ℃, the cooling wind speed is 0.6m/s, the winding speed is 933m/min, the water bath drafting temperature is 78 ℃, the steam drafting temperature is 116 ℃, the stretching ratio is 3.2, the tension heat setting temperature is 137 ℃, and the relaxation heat setting temperature is 77 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 3cN/dtex, and the elongation at break is 41.6%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.69dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 61mm and the filament number of 4.8dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.1:2.0, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 3.2:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 284 ℃, the cooling temperature is 23 ℃, the cooling wind speed is 3.1m/s, the winding speed is 952m/min, the water bath drafting temperature is 85 ℃, the steam drafting temperature is 123 ℃, the stretching ratio is 3.2, the tension heat setting temperature is 144 ℃, and the relaxation heat setting temperature is 106 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short silk b is 3.2cN/dtex, and the elongation at break is 40.6%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 90:10 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 190cm3Fill power V,/g2Is 65cm3/g。
Example 7
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.56dL/g) and PTT (intrinsic viscosity of 1.13dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 127mm and the filament number of 1.2dtex, namely the short filaments a; the temperature of a spinning manifold corresponding to PET is 285 ℃, and the temperature of a spinning manifold corresponding to PTT is 277 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.1:2.4, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.3:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.5:2.4, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 3.3:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 281 ℃, the cooling temperature is 25 ℃, the cooling wind speed is 0.6m/s, the winding speed is 942m/min, the water bath drafting temperature is 79 ℃, the steam drafting temperature is 117 ℃, the stretching ratio is 3.2, the tension heat setting temperature is 139 ℃, and the relaxation heat setting temperature is 79 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 3cN/dtex, and the elongation at break is 41.5%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.7dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 62mm and the filament number of 5.2dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.5, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 3.3:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 284 ℃, the cooling temperature is 24 ℃, the cooling wind speed is 3.3m/s, the winding speed is 965m/min, the water bath drafting temperature is 85 ℃, the steam drafting temperature is 124 ℃, the stretching ratio is 3.2, the tension heat setting temperature is 148 ℃, and the relaxation heat setting temperature is 110 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short fiber b is 3.3cN/dtex, and the elongation at break is 39.7%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 90:10 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 196cm3Fill power V,/g2Is 65cm3/g。
Example 8
A preparation method of mattress filler comprises the following steps:
(1) preparing short silk a:
in the process of preparing circular parallel composite fibers from PET (intrinsic viscosity of 0.58dL/g) and PTT (intrinsic viscosity of 1.15dL/g) with the mass ratio of 50:50 according to a short-filament spinning process, changing spinneret holes on a spinneret plate from circular to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret holes on the spinneret plate to meet certain conditions to prepare short filaments with the length of 130mm and the filament number of 1.2dtex, namely the short filaments a; the temperature of a spinning manifold corresponding to PET is 285 ℃, and the temperature of a spinning manifold corresponding to PTT is 277 ℃;
trilobal orifices fall into two categories: the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0:1.4:2.3, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the length ratio of three leaves of the second type of trilobal spinneret orifices is 1.0:1.6:2.3, the width ratio of the corresponding three leaves is 1.5:1:1, the length ratio of the shortest leaf to the width ratio is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; among the parameters of the short yarn spinning process;
the short yarn spinning process parameters are as follows: the spinning temperature is 282 ℃, the cooling temperature is 25 ℃, the cooling wind speed is 0.6m/s, the winding speed is 1000m/min, the water bath drafting temperature is 80 ℃, the steam drafting temperature is 120 ℃, the stretching ratio is 3.3, the tension heat setting temperature is 140 ℃, and the relaxation heat setting temperature is 80 ℃;
the prepared short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with the cross sections in the trefoil shape, and is taken as an imaginary line intersected with the trefoil shape, the trefoil shape is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT; the breaking strength of the short silk a is 3.1cN/dtex, and the elongation at break is 40%;
(2) preparing short fibers b:
extruding a PET melt with the intrinsic viscosity of 0.7dL/g from a trilobal spinneret orifice on a spinneret plate, cooling by circular blowing, and preparing short filaments with the length of 70mm and the filament number of 6dtex according to a short filament spinning process to obtain short filaments b;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.5, the width ratio of the corresponding three leaves is 1:1:1.5, the length ratio of the shortest leaf to the width ratio is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short yarn spinning process comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting;
the short yarn spinning process parameters are as follows: the spinning temperature is 285 ℃, the cooling temperature is 25 ℃, the cooling wind speed is 3.5m/s, the winding speed is 1000m/min, the water bath drafting temperature is 85 ℃, the steam drafting temperature is 125 ℃, the stretching multiple is 3.3, the tension heat setting temperature is 150 ℃, and the relaxation heat setting temperature is 110 ℃;
the prepared short silk b has a three-dimensional curling shape; the breaking strength of the short fiber b is 3.4cN/dtex, and the elongation at break is 35%;
(3) preparing a mattress filler:
mixing the short filaments a and the short filaments b in a mass ratio of 90:10 to prepare the mattress filler;
bulk V of the resulting mattress filling1Is 197cm3Fill power V,/g2Is 68cm3/g。

Claims (7)

1. A preparation method of mattress filler is characterized in that: mixing the short filaments a and the short filaments b to prepare the mattress filler;
the preparation process of the short silk a is as follows:
in the process of preparing round parallel composite fibers from PET and PTT according to a short-filament spinning process A, changing the spinneret orifices on the spinneret plate from round to trilobal, cooling by adopting circular blowing, and controlling the arrangement of the trilobal spinneret orifices on the spinneret plate to meet certain conditions to prepare short filaments with the length of 100-130 mm and the filament number of 0.8-1.2 dtex, namely short filaments a;
trilobal orifices fall into two categories:
the length ratio of three leaves of the first type of trilobal spinneret orifices is 1.0: 1.1-1.4: 2.0-2.5, the width ratio of the corresponding three leaves is 1.5:1.5:1, the length ratio of the shortest leaf to the width ratio is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees;
the length ratio of three leaves of the second type of trilobal spinneret orifice is 1.0: 1.5-2.0: 2.0-2.5, the two long leaves are not equal in length, the width ratio of the corresponding three leaves is 1.5:1:1, the length-width ratio of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of the two adjacent leaves is 120 degrees;
the certain conditions are as follows: taking any horizontal line passing through the center of the spinneret plate as a reference line, wherein the center line of the longest leaf of the first trilobal spinneret orifices is parallel or orthogonal to the reference line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the center line of the shortest leaf of the second type of trilobal spinneret orifices is parallel or orthogonal to the datum line, and the number of the parallel and orthogonal trilobal spinneret orifices is equal; the number of the two types of trilobal spinneret orifices is equal;
the contact surfaces of PET and PTT are parallel to each other when flowing in the guide holes of the trefoil spinneret orifices;
the short yarn spinning process A comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; in the parameters of the short-yarn spinning process A, the temperature of relaxation and heat setting is 70-80 ℃;
the short filament a has a three-dimensional curling shape, consists of a plurality of PET/PTT parallel composite monofilaments with trefoil cross sections, and is used as an imaginary line intersected with the trefoil, the trefoil is divided into two parallel parts by the imaginary line, one part corresponds to PET, and the other part corresponds to PTT;
the preparation process of the staple b is as follows:
extruding a PET melt from trilobal spinneret orifices on a spinneret plate, cooling by circular blowing, wherein the cooling temperature of the circular blowing cooling is 20-25 ℃, the cooling air speed is 2.2-3.5 m/s, and preparing short fibers with the length of 50-70 mm and the filament number of 2.0-6.0 dtex according to a short fiber spinning process B to obtain short fibers B;
in the preparation process of the short silk b, the ratio of the lengths of the three leaves of the same trilobal spinneret orifice is 1.0: 1.1-1.4: 2.0-2.5, the ratio of the widths of the corresponding three leaves is 1:1:1.5, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
in the preparation process of the short filaments b, all the trilobal spinneret orifices are distributed in concentric circles, and the center line of the shortest leaf of each trilobal spinneret orifice passes through the circle center and points away from the circle center;
the short filaments b have a three-dimensional crimp shape;
the short yarn spinning process B comprises the following steps: extrusion → cooling → oiling → winding → storage → bundling → water bath drafting → steam drafting → tension heat setting → curling → cutting → relaxation heat setting; in the parameters of the short yarn spinning process B, the temperature of relaxation heat setting is 100-110 ℃.
2. The method of claim 1, wherein the mass ratio of PET to PTT is 50:50 when preparing the staple a.
3. The method for preparing the mattress filler according to claim 2, wherein when the short filament a is prepared, the intrinsic viscosity of PET is 0.50-0.58 dL/g, and the temperature of a spinning manifold corresponding to the PET is 280-285 ℃; the intrinsic viscosity of PTT is 0.97-1.15 dL/g, and the temperature of a spinning box body corresponding to PTT is 274-277 ℃; when preparing the staple fiber b, the intrinsic viscosity of PET is 0.60-0.70 dL/g.
4. The method for preparing mattress filler according to claim 3, wherein the other parameters of the staple spinning process A corresponding to the staple a are as follows: the spinning temperature is 278-282 ℃, the cooling temperature is 20-25 ℃, the cooling air speed is 0.4-0.6 m/s, the winding speed is 800-1000 m/min, the water bath drafting temperature is 75-80 ℃, the steam drafting temperature is 110-120 ℃, the stretching ratio is 3.0-3.3, and the tension heat setting temperature is 130-140 ℃; other parameters of the short yarn spinning process B corresponding to the short yarn B are as follows: the spinning temperature is 280-285 ℃, the winding speed is 800-1000 m/min, the water bath drafting temperature is 80-85 ℃, the steam drafting temperature is 120-125 ℃, the stretching ratio is 3.0-3.3, and the tension heat setting temperature is 130-150 ℃.
5. The method for preparing mattress filler according to claim 1, wherein the breaking strength of the staple fiber a is not less than 2.8cN/dtex, and the elongation at break is 43.0 ± 3.0%; the breaking strength of the short fiber b is more than or equal to 3.0cN/dtex, and the elongation at break is 40.0 +/-5.0%.
6. The method for preparing a mattress filler according to claim 5, wherein the mass ratio of the short filaments a to the short filaments b is 80:20 to 90: 10.
7. The method for preparing mattress filler according to claim 6, wherein the mattress filler has a bulk V1＞176cm3Fill power V,/g2＞57cm3/g。
CN201911386278.6A 2019-12-29 2019-12-29 Preparation method of mattress filler Active CN111101213B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264390A (en) * 1963-07-15 1966-08-02 Du Pont Process for preparing multifilament yarns
GB1096249A (en) * 1964-11-24 1967-12-20 Schweizerische Viscose Spontaneously crimping composite filaments and yarns
CN1966789A (en) * 2005-11-15 2007-05-23 上海民光被单厂 Polyester fiber filling materials and filling process therefor
CN103225118A (en) * 2013-03-27 2013-07-31 嘉兴学院 Side by side composite fiber spinneret plate, method of preparing three-dimensional crimp antibacterial fiber with spinneret plate and application of three-dimensional crimp antibacterial fiber
CN105908273A (en) * 2016-07-05 2016-08-31 雷鸣 Double-component composite fiber with high fuzzing and pilling resistance and high wear resistance and preparation method thereof
CN106149071A (en) * 2016-08-31 2016-11-23 王家铭 Outside bicomponent dies, compound parallel type is from Curl chopped fiber production method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264390A (en) * 1963-07-15 1966-08-02 Du Pont Process for preparing multifilament yarns
GB1096249A (en) * 1964-11-24 1967-12-20 Schweizerische Viscose Spontaneously crimping composite filaments and yarns
CN1966789A (en) * 2005-11-15 2007-05-23 上海民光被单厂 Polyester fiber filling materials and filling process therefor
CN103225118A (en) * 2013-03-27 2013-07-31 嘉兴学院 Side by side composite fiber spinneret plate, method of preparing three-dimensional crimp antibacterial fiber with spinneret plate and application of three-dimensional crimp antibacterial fiber
CN105908273A (en) * 2016-07-05 2016-08-31 雷鸣 Double-component composite fiber with high fuzzing and pilling resistance and high wear resistance and preparation method thereof
CN106149071A (en) * 2016-08-31 2016-11-23 王家铭 Outside bicomponent dies, compound parallel type is from Curl chopped fiber production method

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