JPH04214453A - Nonwoven fabric clothes - Google Patents

Abstract

PURPOSE:To obtain the subject high-strength clothes, excellent in hygroscopicity, drapeability, etc., by densely and three-dimensionally interlacing staple fiber containing regenerated cellulosic fiber having a specific diameter and a specified aspect ratio of single fiber, carrying out resin finishing of the prepared wet nonwoven fabric, then bonding and sewing the resultant nonwoven fabric. CONSTITUTION:Staple fibers (f1), (f2), (f3)... (with preferably 20--70wt.% content of regenerated cellulosic fiber) containing the regenerated cellulosic fiber having 7-25mum diameter of single fiber and 0.3X10<3> to 1.0X10<3> ratio of the fiber length(L) to the diameter(D) of the single fiber are three-dimensionally interlaced to form a wet nonwoven fabric having <=300mum average distance between the interlaced points of (a1), (a2), (a3).... The resultant nonwoven fabric is then subjected to resin finishing and clothes are subsequently bonded and sewn.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to nonwoven clothing suitable for disposable clothing that is excellent in cleanliness, functionality, safety, and comfort.

0002

[Prior Art] Many types of clothing made of non-woven fabrics have been released, but they all have poor strength, are paper-like, and do not have sufficient moisture absorption, heat retention, or breathability. It wasn't pleasant. Furthermore, since they are machine sewn using thread, they have the disadvantage that they can become punctured, tear at the seams, and cause cuts to the body due to frayed threads.

0003

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned drawbacks of conventional nonwoven fabric clothing and to provide nonwoven fabric clothing that is superior in functionality, safety, and comfort.

0004

[Means for Solving the Problems] The present invention provides that the diameter of the single yarn is 7 to 25 μm, and the ratio L/D of the fiber length L to the diameter D of the single yarn is 0.
．． A wet-laid nonwoven fabric in which short fibers containing regenerated cellulose fibers having a size of 3 x 103 to 1.0 x 103 are three-dimensionally entangled, and the average distance between entangled points is 300 μm or less, is processed with resin and sewn with adhesive. This is a non-woven garment featuring the following.

[0005] The nonwoven fabric of the present invention comprises a nonwoven fabric having a single yarn diameter of 7 to 25 μm, a fiber length L, and a single yarn diameter D.
It is a wet-laid nonwoven fabric in which short fibers containing regenerated cellulose fibers having a ratio L/D of 0.3 x 103 to 1.0 x 103 are three-dimensionally entangled, and the average distance between entangled points is 300 μm or less. It is characterized by First, the constituent fibers have a single yarn diameter of 7 to 25 μm, and a ratio of fiber length L to single yarn diameter D, L/
It is necessary that D satisfy two factors of 0.3×10 3 to 1.0×10 3 . If the single yarn diameter is less than 7 mm, even if L/D is within the above range, the single yarn tenacity is too low, resulting in low strengths such as tensile strength, tear strength, and even delamination strength, etc. can't reach its goal.

[0006] If the single yarn diameter exceeds 25 μm, even if L/D is within the range of the present invention, the fibers are too thick and the surface uniformity and density of the nonwoven fabric is lost, making it impossible to achieve the purpose of the present invention. Therefore, from the point of view of strength and uniformity, the single yarn diameter needs to be 7 to 25 μm, and the preferable range is 10 to 17 μm. Next, the L of the raw yarn
/D is 0.3×103 to 1 within the above fiber diameter range
．． It needs to be 0x103, and its preferred range is 0.5x103 to 0.8x103. L of raw yarn
The inventors have found that /D has an important relationship with the ease with which fibers are entangled with each other, and L/D is 0.
．． If it is less than 3 x 103, the entanglement between the fibers increases and the number of contact points decreases, resulting in lower tensile strength and
The tear strength and further the interlayer peel strength of the layers are low, making it unsuitable for use as nonwoven clothing.

Furthermore, when L/D exceeds 1.0×10 3 , the movement of the fibers is suppressed, making it unsuitable for nonwoven clothing with good texture and less intertwining of the fibers. 0 of the present invention.
Practical high strength and excellent hand feel can only be obtained within the range of 3 x 103 to 1.0 x 103. Next, in the nonwoven fabric used in the present invention, such yarns have an average distance between fiber entanglement points of 3.
It is necessary to have three-dimensional entanglement in a state of 00 μm or less. Even if the wet nonwoven fabric is made of specific short fibers as referred to in the present invention, the fibers may not be intertwined with each other in the as-made state, or even if they are intertwined, the average distance between fiber entanglement points may exceed 300 μm. A relatively loose entangled state is
This is not preferable because the high strength targeted by the present invention cannot be obtained.

[0008] The diameter of the single yarn constituting the nonwoven fabric used in the present invention may be circular or may have various non-circular cross sections. In the case of a circular shape, the diameter of the single yarn is determined by directly measuring its diameter, and in the case of a yarn with an irregular cross section, the diameter of the single yarn is determined by measuring its fineness (denier) using the gravimetric method, and calculating this denier by measuring the diameter of the single yarn. It will be expressed by the average diameter obtained by equation 1 assuming that it is circular.

[0009]

[Math 1]

[0010] The fiber average intertwining point distance here refers to a value measured by a method known in Japanese Patent Laid-Open No. 191280/1983, and is a measure of the intertwining density between fibers, and the smaller the value, the more This shows that the confounding is dense. FIG. 1 is an enlarged schematic diagram of the constituent fibers of a wet-laid nonwoven fabric when observed from the surface in a plane direction. The constituent fibers are f1, f2, f3..., and the point where any two fibers f1, f2 are intertwined is a1, and the fiber f2, which is above the other fibers, is below the other fibers. Trace the intersection to the point where it intersects, and let that point be a2. Similarly, a3, a4,...
shall be. Next, measure the linear horizontal distances a1, a2, a3, ... between the interlacing points obtained in this way, calculate the average value of these many measured values, and calculate this as the average distance between fiber interlacing points. shall be.

The yarn constituting the wet-laid nonwoven fabric used in the present invention is short fiber containing regenerated cellulose fibers such as rayon, and other fibers such as polyamide fibers such as nylon 6, nylon 66, and nylon 610, polyethylene terephthalate, and polyethylene terephthalate. Polyester fibers such as butylene terephthalate, polyolefin fibers such as polypropylene, polyethylene, etc. are preferably used within the fiber diameter and L/D ranges of the present invention. The content of regenerated cellulose fibers in the short fibers is preferably 20 to 70 wt%. In addition, the Young's modulus of the raw yarn is 50 to 700 kg/mm2, especially 50
It is preferably in the range of ~500 kg/mm2. Raw yarn with a high Young's modulus exceeding 700 kg/mm2 also has high bending rigidity, and in order to achieve an intertwined state with an average fiber intertwining point distance of 300 μm or less as defined in the present invention, a large intertwining force (for example, a very high pressure) is required. Problems may arise, such as the need for columnar water flow.

[0012] As a result, the nonwoven fabric clothing of the present invention has high strength, excellent moisture absorption, heat retention, and air permeability, and has excellent drapability and has a flannel-like texture and is comfortable to wear. Moreover, it is preferable that the nonwoven fabric of the present invention contains thermoplastic fibers in the constituent nonwoven fabric. As a result, the thermoplastic fibers in the nonwoven fabric are melted and bonded by fusion sewing, which will be described later. The content of thermoplastic fibers is preferably 10 wt% or more, more preferably 30 wt% or more.
wt% or more.

The diameter of the staple fibers of the thermoplastic fibers is not particularly limited, but from the viewpoint of the strength of the nonwoven fabric, the diameter of the single filaments is 7 to 7.
25μm, ratio L/D of fiber length L to single yarn diameter D is 0.8
It is preferable that it is x103 - 2.0x103. Examples of thermoplastic fibers include polyamide fibers such as nylon 6, nylon 66, and nylon 610, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, and polyolefin fibers such as polypropylene and polyethylene. Regarding the basis weight, heat retention,
From the viewpoint of air permeability, etc., it is 30 to 100 g/m2, preferably 40 to 70 g/m2.

[0014] As a method for manufacturing the above-mentioned nonwoven fabric, for example, the method disclosed in JP-A-2-6651 is suitable. The nonwoven fabric clothing of the present invention is characterized in that the thus obtained nonwoven fabric is resin-treated and adhesive-sewn. Resin processing as used in the present invention means adding a binder to the wet-laid nonwoven fabric so that it can withstand wearing. The type of binder is polyvinyl alcohol. Examples include fibrous substances such as fibrids, and synthetic resin emulsions such as polyacrylate, polyvinyl acetate, polybutadiene, polyacrylonitrile, and styrene-butadiene copolymers. Which binder to use among these may be appropriately selected depending on the wet-laid nonwoven fabric used, but care must be taken not to destroy the texture. The amount of binder applied is 1 to 5 g/m2
is preferred.

[0015] Adhesive sewing in the present invention does not use thread,
By gluing a nonwoven fabric, we mean sewing it, and in addition to the fusion sewing method in which the fibers constituting the nonwoven fabric are softened or melted, examples include methods of bonding using hot melt adhesives, etc. Examples include ultrasonic sewing machines, welders, heat seals, etc.

[0016]

[Example] Fiber length is 10 mm, single yarn diameter is 1 d (10 μ
m) polyethylene terephthalate fiber (L/D=10
3), the fiber length is 7 mm, and the diameter of the single yarn is 1 d (97 μm).
Rayon fiber (L/D=0.72×103) of 75
A paper-formed sheet of 50 g/m 2 mixed at a weight ratio of :25 was obtained by the method disclosed in JP-A-2-6651. This paper sheet was impregnated with a solution of 10% aqueous acrylic acid ester resin emulsion with 0.35% water-soluble pigment added, squeezed to a squeezing rate of 120%, dried in a cylinder at 120°C, and further It was dried with a pin tenter at 160°C and softened with a cam fit to obtain a nonwoven fabric for clothing.

This nonwoven fabric for clothing was cut out using an automatic cutting machine and sewn using an ultrasonic sewing machine to obtain the nonwoven clothing of the present invention. The physical properties were measured according to JISL-1096 and were as follows. Weight (g/m2) 64.3
Thickness (mm) 0.2
7 Tensile strength Vertical 14
．． 9 (kg/cm) Horizontal 8.4 Tensile elongation Vertical 32.8 (%
) Width 69.0 Tear strength (g) Vertical 2003 (A-1 method)
Horizontal 1733 water absorption (cm)
Vertical 13.4 (byrec method) Horizontal 12.0 breathability
75.1 (cm3/cm3.S) Heat retention
24.7 When this was used as a hospital gown for a bedridden elderly person, it had excellent moisture absorption, breathability, and heat retention, and did not cause pressure sores, and caregivers commented that because it could be used as disposable clothing, it was easy to wash, dry, and fold. Benefits such as being freed from the labor of other people were cited.

[0018]

[Effects of the Invention] When the non-woven clothing of the present invention is used as indoor wear for elderly people with dementia, it will not cause cuts to the body due to frayed sewing threads, and it will not accidentally put it in the mouth and cause choking. When used as a hospital gown for a bedridden elderly person, the soft texture and adhesive stitching prevent bedsores.
When used on general patients in the hospital, it helps prevent disease infection due to washing, etc. When used as portable sleepwear for travel, it can be used 2 to 3 times even after washing, and has many effects.

[Brief explanation of the drawing]

FIG. 1 shows an enlarged schematic diagram of constituent fibers when observed from one surface in the planar direction of a nonwoven fabric used in the present invention.

[Explanation of symbols]

f1 ~ f2 Constituent fibers

Claims (1)

[Claims] [Claim 1] Single yarn diameter is 7 to 25 μm, fiber length L
and the diameter D of the single yarn L/D is 0.3 x 103 ~ 1.0
×103 Short fibers containing regenerated cellulose fibers are three-dimensionally entangled, and the average distance between entangled points is 300 μm.
A non-woven garment characterized by having the following wet-laid non-woven fabric processed with resin and sewn with adhesive.