JPS5936757A - Laminate nonwoven fabric and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides at least two webs: a nonwoven fabric made of one ultrafine fiber with a 11° fineness of less than 0.5d, r, and a web made of IJ aesthetic/L' fibers with a diameter of 11° fineness of less than 0.5d, r. The present invention relates to a laminated nonwoven fabric with good heat retention and shape stability, and a method for producing the same.

Since ancient times, natural fibers such as cotton, wool, and feathers have been used not only for futon cotton, but also for quilting for winter sports and bedding, and gloves.

It has been used for cushioning materials such as gloves.

However, due to the lack of supply due to population growth and the shortcomings of natural fibers, such as low compression recovery (easily flattening) and sagging, synthetic fibers, especially stuffed cotton made of polyester fibers, are now the mainstream. It's coming.

Recently, there has been a strong demand for synthetic fiber padding, which is lightweight, has heat retaining properties, has good dimensional stability when washed and ironed, and fits the body (drapes well), especially for use in cold-weather clothing. For example, Japanese Utility Model Publication No. 49-31923 and Japanese Utility Model Application Publication No. 52-102412 describe laminating a large dr fiber layer and a fine dr fiber layer and performing needle punching, but they are just piles.

In a mix, it is possible to obtain the heat retention, tray properties, and shape stability of the present invention! II t. 'Also, Unexamined Japanese Patent Publication No. 5
3-4-1 Random webs consisting of ultrafine fibers with a dr. It is described as having a heat retaining power approximately twice that of conventional polyester, wool, and feathers (0.9 to LOCLO/crs). However, the random web has the disadvantage that it is difficult to mix different deniers uniformly in d2, and unevenness tends to occur in heat retention, drapability, compression recovery, etc.

Against this background, the inventors of the present invention have conducted extensive research into cotton wadding that is uniform and has good heat retention and drapability, as well as good thermal shape stability, and as a result, they have arrived at the present invention as described below.

1. Eyes made of ultrafine fibers of less than 0.5 tlr; 12
Non-woven fabric of 0.-100ti7tri and polyester lv fiber fa of o, sdr or more.
g, /nf is a laminated nonwoven fabric in which at least two layers of webs are entangled, and the volume of one layer of the laminate is 30 to 1 o.
ocl/9. Air permeability is 80 CI+, /c4 2F or more, heat retention capacity per thickness 1011 is 1.5cLO or more and 1
40'C: Area shrinkage rate when steam set for 1 minute is 10
A laminated nonwoven fabric with good heat retention and morphological stability, characterized in that it is less than %.

2. The laminated nonwoven fabric according to the preceding item, characterized in that the web is a mixture of 0:5 to 2 dr polyester fibers and 3 to 8 dr polyester TV lit fibers at a weight ratio of 20:80 to 80:20. 5. In each of the preceding items, adhesive fibers and/or adhesive resin of 1 to Qdr are added to the web at a rate of 50% by weight based on the weight of the web.
A laminated nonwoven fabric characterized in that it is mixed with less than a weight of rice cake.

4. Each of the preceding items relates to a laminated nonwoven fabric having a three-layer structure in which a web is sandwiched between two layers of nonwoven fabric, and a method for producing such laminated nonwoven fabrics.

The fibers in the small woven fabric made of ultra-fJII fibers with less than 0.5dr according to the present invention are polyester-based, and have a diameter of less than 0.5dr.
Refers to thermoplastic synthetic fibers such as mid-type and polyolefin-type fibers, and refers to ultrafine fibers obtained by any of the following methods: melt blow spinning, splitting of mixed spun fibers, and extraction of the same fibers. Such ultrafine fiber nonwoven fabrics can be formed directly after the inner dimension of the yarn is stretched for one generation using, for example, a melt blowing method, a flash spinning method, a melting one spinning method, and an air jet stretching method. It is preferable to use fibers from 1 to 1, but conventional method 1 (there is no problem in forming a nonwoven fabric by spreading a more stapled material over a card web to form a nonwoven fabric). 0,5 in terms of gender
It must be tlr not Jt:l:t&J, and the fabric weight should be 20 to 100 in terms of drapability (fitness to the body).
Q/F7/Dedeke J7-Genaranai. In this ζ, ■(=
When J is 20/27 meters (111 →), the heat retention is reduced and the air permeability is increased, so the effects of the present invention are obtained)11
If it exceeds 100 Qltd, it will be insignificant in terms of weight, drapery, and cost.
1) A non-woven fabric made of 111 fibers alone does not have the ability to sing (it has less air content), resulting in a low heat retention capacity. The mesh size is 50 to 150 g made of polyester fiber, /
It is desirable that the l-knee web is laminated with the ultrafine nonwoven fabric through entanglement treatment. The polyester used in the present invention has excellent properties such as high strength, high Young's modulus, and chemical resistance, and is suitable for heat retention due to its shape stability due to heat and humans.

In terms of bulkiness and compression recovery, u, 5 dr or more, preferably t
0.5-2 dr polynis y/l/m, male and 3
~l) dr polyester/L/fiber weight ratio: 20:
A crimped web having a B o of 80 to 20 tiat/il is preferable. In terms of drape properties and 1-high properties, the web's eyes: J is 30 to 150 (ΔI', t
, < id 50-100 Q/c4, and the IM
d'l! It is best to have a non-woven layer and a web layered together through an entanglement process, and from the viewpoint of ease of handling and heat retention, a two-layer non-woven layer is preferred. , IV (two) 6 layers (7ζ) sandwiching the nib
It is more preferable to use a non-woven fabric with a structure of stacked ribs. As for the entanglement process,
Any method may be used, such as thermal bonding using heated rolls or knee 1/° loopers, but from the viewpoint of bulkiness and drapability, knee 1:) v-bunch, point bonding with adhesive, double bonding fibers Preferred is low pressure thermal bonding. adhesive, 'jS
, L and post-adhesive fibers xiC have adhesion strength of 11 to both the ultrafine nonwoven fabric and the web, and have a strength of 50 weight t to the web.
It is actually more likely that F is mixed in than it%.

I of the present invention;! The drapability of J Hui is amazing.
'l; i = M- If you do not add up the following five requirements, you will not be satisfied.

(1) l'+'t H Specific volume of nonwoven fabric 81 t:J:
30~100 c4/ 9 'if true 40~8
nc1. / With Jin who is Q. Specific volume is 30cd, /9
If it is less than 100 d/Q, the bulk will be low, leading to a decrease in #l retention due to a decrease in liquid volume, and if it exceeds 100 d/Q, the bulk will be 1f-5.
Tsutte tray 11! If V is insufficient rl #, the air movement in the IC gap is large and the vortex retaining force is low. Note that the volume of 11 is expressed by the following formula.

It; Yi l! 'i-''(t,,XA)/
W (c4 / Q) (2) JIfl[・-
Tl determined by the 7 Razir method of I U 79 K 1 (
(' must be less than or equal to 100 n(:,,'crl scc.

Q11 is a measure of the transportability of air in a laminated product, and Q l l! (・/ If you exceed the CD direction, the heat retention capacity per m is 1.5 CL (J pl, The above is a good value.

(3) The heat retention capacity per meter of thickness must be 1.50LO or more.

The ultrafine nonwoven fabric of the present invention has a fabric weight of 20 to 1009/cd, less than sdr, and 0.5d has a fabric weight of 30 to 150q/c-
When laminating polyester webs of R or more, it is necessary to perform a lamination and entanglement treatment to have the above-mentioned specific volume and air permeability. It is possible to maintain a higher thermal insulation labor fee.

In the present invention, the heat retention capacity (CL(
J/cm) means the value determined by the following formula: 1.7
, temperature 20-25°C, humidity around 65%, airflow 15-2
A8'J'M heat retention tester (
(manufactured by Toyo Seiki) under 0.5g/d#i weight 0) 30
An X 50 layer m sample (laminate) thickness and 2 hours per 9
Calculated by measuring the amount of heat released.

[3C11111r/ (nl (18) and 1 ("Cnl hr /H) f4+, 3 invention + 7.) Another advantage is that it has good form stability. When sewing, sewing or ironing Due to heat shrinkage, the cotton wadding separates from the geodesic space, which causes the outside of the cow. However, the laminated non-woven fabric of the present invention uses a high quality polyester/L/fiber of T*; It has been found that excessive heat shrinkage in post-processing can be prevented by heat treatment at °C. However, when polyolefin fibers with a low melting point are used, it is preferable to carry out the moist heat treatment within a range that does not cause melting or fusion. In the case of wood products, considering the dimensional stability in heat 1/s after washing, the area shrinkage rate when steam set at 140° C. for 1 minute is preferably 10% or less, preferably 5% or less.

Hereinafter, the present invention will be specifically explained with reference to Examples.

Examples 1 to 2 and Comparative Examples 1 to 3 Ultrafine nonwoven fabrics of nylon 6 with a size of 0.01 to 2 dr were produced using a one-way melt blow method, and 1 dr x 38 closed/3 d
After laminating in 3 or 2 layers with a polyester short fiber web of rXFIIljl = 5015 (weight ratio) and performing an entanglement treatment with a needle punch, a laminated nonwoven fabric was produced by performing a suderam dry heat treatment at 150 ° C. Table 1 shows the manufacturing conditions and physical property evaluation results of the laminated nonwoven fabric.

Example 1 has a three-layer structure in which a polyester web with a mesh size of 4, J60 f/pl is sandwiched between ultrafine nonwoven fabrics with a fabric weight of 40 Q,/nl, and the specific volume it'i is 54.0.
rAI'i, air permeability 34, 1 r3r3/dsec,
The heat retaining power per 1 aN thickness is 2.13 CLO/cm, making it a highly heat retaining nonwoven fabric that has never been seen before.

Furthermore, the value of the swing lever is low and highly flexible,
140" (jX surface when steam set for 1 minute) The blue shrinkage rate was 5.2%, which was excellent in form stability and handleability, and was satisfactory as a high-grade medium cotton for quilting. Fine particles of polyethylene were coated on one side of the three-layer nonwoven fabric (thermally adhered to the lining or outer fabric of the garment, such as a 15L interlining), and a highly heat-retaining garment without lining was obtained.

Example 2 is a two-layer type of polyester web on ultra-fine non-woven fabric, and like Example 1, it satisfies the structural requirements of the wood invention, and has a batting with heat retention and tray properties, making it valuable as work clothes for cold weather. It became a thing.

In Comparative Example 1, the kneepan density was increased to 400 punches/d, but the volume was reduced and there were many punch holes, resulting in high air permeability and low heat retention.

11z-axis example 2 has a small basis weight of the giant nonwoven fabric of 159/rtl, which is +44 degrees, but the ventilation Lψ is 100 cp/rd.
It is more than spc, and the heat retention power of 1cN thickness is L25U.
It was as low as 0.

In Comparative Example 3, the basis weight of the polyester web is 1809/
ttl], but the specific volume and air permeability are somewhat large/the heat retention capacity per thickness 1cI11 is L
It had a low 3D OLO and also lacked 1-elasticity.

Example 5 Polypyrene-based polymer was dissolved in a solvent and flash-spun to produce an ultrafine non-woven fabric of 0,005 to 0 jdr and a date of 70 days. On the other hand, for 6drx'64 silk polyester staple, the melting point is 2ar at 110℃.
A web having a basis weight of 1209 /FF/ was prepared by mixing 40% heavy paper with &W;14'Lyester stable of xs1. Next, the web and the ultrafine nonwoven fabric were laminated and sandwiched between belts, and the polyester was modified by dry heat treatment at 140°C. The obtained non-woven fabric has a bulky and soft feel, and has a specific volume of 8.
2 cd, /f, air permeability 65 C3 (:,, /c4”
jt has a heat retention capacity of 1.740 L O/ω, making it a high value-added stuffed cotton. In addition, since the dry heat treatment was carried out at 140°C, the area shrinkage when steam set at 140'(''! x 1 minute) was 6.4 arrows, which caused no problems in handling.

Example 4 Polystyrene and polyester were mixed at a weight ratio of 1:1, and a seabird structural fiber was spun and drawn using a chip blending method, then crimped, and a date 1609. /F7
A tow nonwoven fabric of / was produced. On the other hand, 1,5 rlr/
6 dr = 30. /70 (heavy claw ° ratio) and date 12
0Q/n〆 made polyester web fJi'J L,
After laminating the tow hand-woven fabric upward, the polystyrene was dissolved and removed using a hot toluene shower at 85°C, and at the same time, a hydroentangling process was performed to form a laminated non-woven fabric consisting of a tentative polyester non-woven fabric and a 6-denier polyester web. Obtained. The tow nonwoven fabric is made of polystyrene (polystyrene);
100 t-0,1) 5 dr- polyvarnish f/l
/ About 80 (1,
/d 5 Then, the laminated nonwoven fabric was heated at 170°
After heat treatment using the suction membrane method of C, the bulkiness of the fiber layer was improved by light brushing.
．． /9, air permeability 58 (2C/c4!VIC, heat retention power 1, 820LO/cm), which had high heat retention and compression recovery of -11. %"JfIi In Example 2', 3dr10+3%, using a polyester web weighing 60 g, +/, an acrylic binder was dotted on the polyester in place of needle bunches to form a night 1 ton. After layering 41!1 layer with ultra-fine non-woven fabric from No. 6, heat treatment at 180°C□
A laminated non-woven fabric was produced by applying the proverbial bamboo using a res roller (7 steps).

The volume of the non-woven material 1 is 49.2cΔ・7g9 Air permeability 5L7 cc, 10 Dagen.

Claims (1)

[Scope of Claims] (1) Column 1 (ED, fabric weight 2° = I Q Of, 'tn' tl) made of ultrafine fibers of less than 5 dr) and U, fabric weight of polyester fibers 114 of 5 dr or more.
A laminated non-scarlet fabric in which at least two layers of webs of 30 to 150 f/d are entangled, and the specific volume of the laminate is 3
0 to 100 cd/&, air permeability is 80cc/c, heat retention power is 1.5 (! LO or more, 140'CX1 min), area shrinkage when set. A laminated nonwoven fabric with good heat retention and shape stability, characterized in that the ratio is 10% or more. (2) In the previous section, the web is made of polyester r! A laminated nonwoven fabric characterized in that 3 to 8 dr Novolieste/l/rlk N. is mixed in a heavy Ji ratio of 20:80 to 80:20. (b) In each of the preceding items, the web A laminated nonwoven fabric characterized in that adhesive fibers of 1 to Qdr are mixed in the laminated nonwoven fabric. (4) In each of the preceding items, the laminated nonwoven fabric is characterized in that a web is sandwiched between two layers of nonwoven fabric. Laminated nonwoven fabric with 3-layer structure. (5) Fineness less than 0.5 dr and basis weight 20-100 Q/n
? At least two layers of ultrafine fiber nonwoven fabric and a web of 30 to 150 f/ni made of polyester IT fibers of 0.5 dr or more are laminated and subjected to entanglement treatment'@:,
Dry heat or wet heat treatment at 120-200°C (specific volume 30-100 d/f, air permeability 13 Q cc /c4
% or less, and has a heat retention power of 1.5CI per thickness of 1ω, and 0 or more.1406(' A method for producing a 41′ single-layer nonwoven fabric with good properties.
A method for producing a laminated nonwoven fabric, characterized in that the fibers are obtained by any one of the melt blow spinning method, the splitting method of mixed spun fibers, and the extraction method of the same fibers. (7) #! In the range 5 to 6 of the WN requirement, the web is 0.5 to 2 +lr polyx7. te tv il
! 3 to 8 dr o) polyester fiber (L is a mixture of 20:80 to 80:20 by weight ratio) Bu1 [
Law. (8) In claims 5 to 7, 1 on the web.
~Q +iF A method for producing a laminated nonwoven fabric characterized by mixing and fusing L-woven fibers. (9) In claims 5 to 8, the entanglement process is a needle punch method or a fluid entanglement method.
(ILI fi-In Claims 5 to 9, a method for producing a laminated nonwoven fabric having a three-layer structure by sandwiching a web between two layers of nonwoven fabric is specified as +2'!t) Method of manufacturing nonwoven fabrics.