JP2009007689A - Woven or knit fabric with pattern like kasuri - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a woven or knit fabric produced by using a paper yarn made of a natural pulp paper, having excellent water-resistance and high flexibility, keeping the characteristic touch/feeling of a natural pulp paper, and suitable for a surfacing material, etc. <P>SOLUTION: A natural pulp paper having a basis weight of 10-40 g/m<SP>2</SP>is cut to form a paper tape having a width of 1.5-15 mm, and the tape is twisted to obtain a soft-twist paper yarn 11, which is used as a material for the woven or knit fabric. The paper tape is twisted at a twist count of 40-200 per meter in a manner to generate uneven twist, wherein the twist count of the hard-twist part 21 is three or more times the twist count of the soft-twist part 22. A pattern like splashed Kasuri pattern is developed by the apparent difference of the soft-twist part and the hard-twist part to obtain a woven or knit fabric having high added value from the viewpoint of design. Since the inner gaps 14 and the outer groove gaps 19 are generated in and out of the soft-twist paper yarn, a functional substance can be applied together with an aqueous resin composition to obtain a woven or knit fabric having excellent water-resistance and functionality. There is no deterioration of the characteristic touch/feeling of the natural pulp paper because the aqueous rein composition and the functional substance are adsorbed and held in the gaps 14/19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paper woven or knitted fabric constituted by twisted paper yarn obtained by twisting a paper tape formed by cutting paper.

  Natural pulp paper made from natural pulp (plant short fibers) collected from plants is wet and easily broken. Accordingly, it is considered that paper cloth using paper yarns made of natural pulp paper is also vulnerable to water. Therefore, in the present time when a wide variety of synthetic fibers such as polyester fibers and acrylic fibers can be obtained at a low cost, paper cloth using natural pulp paper is hardly used.

  However, research for imparting water resistance to paper yarns and paper fabrics continues. As a means to increase the strength by imparting water resistance to the paper yarn or paper cloth, adding a water-resistant binder such as an epoxidized polyamide resin to natural pulp, which is a raw material for paper making of natural pulp paper Paper making method (for example, see Patent Documents 1, 2, and 3), and a twisted coating method in which a reinforcing yarn is covered with a twisted yarn on a paper yarn, or a paper yarn is twisted on a reinforcing yarn (for example, a patent document) 4, 5, 6) are known.

Japanese Patent Laid-Open No. 08-060473 (Patent No. 2994209) JP 09-188928 A (Patent No. 3432689) Japanese Patent Laid-Open No. 2001-200441 Japanese Utility Model Publication No. 15-015406 JP 2002-194642 A JP 2002-194667 A

  In both the resin-added papermaking method and the twisted-coating method, the obtained paper yarn has a plastic monofilament tone and lacks hygroscopicity, and loses the feel and texture inherent to natural pulp papermaking paper.

  Thick paper strings used for packing and packing are also known. However, if a thick paper string is used, a flexible paper cloth suitable for curtains, wall interior materials, surface materials, etc. cannot be obtained. First, the packing string is thick and rigid, so it cannot be applied to knitting machines.

  Therefore, the present invention uses a paper thread made of natural pulp papermaking, is excellent in water resistance and rich in flexibility, and maintains the feel and texture inherent to natural pulp papermaking, such as roll screens and panel curtains. An object of the present invention is to obtain a paper woven or knitted fabric suitable for curtains, wall interior materials, surface materials and the like.

The woven or knitted fabric according to the present invention is formed by twisting a paper tape having a width of 1.5 to 15 mm obtained by cutting a natural pulp paper-making paper having a basis weight of 10 to 40 g / m ² , and has an average twist number of 40 to 200 times. / M, and the twisted number (H) of the strong twisted part 21 having the maximum number of twists is 3 times or more the twisted number (L) of the sweetly twisted part 22 having the minimum number of twists. The first feature is that the paper yarn 11 is woven and knitted, and a toned texture pattern due to the difference in appearance between the strong twist portion 21 and the sweet twist portion 22 is depicted.

  The second feature of the woven or knitted fabric according to the present invention is that, in addition to the first feature, there are gaps 14 and 19 inside the sweet twisted paper yarn 11, and the aqueous resin composition is imparted to the sweet twisted paper yarn 11. The water-based resin composition is infiltrated into the gaps 14 and 19 inside the sweet twisted paper yarn 11 and fixed.

  The third feature of the woven or knitted fabric according to the present invention is that, in addition to any of the first and second features, the paper yarns entangled in the woven stitch 12 are joined by the aqueous resin composition. is there.

  The fourth feature of the woven or knitted fabric according to the present invention is that, in addition to any of the second and third features, the aqueous resin composition contains a water-soluble flame retardant.

  A fifth feature of the woven or knitted fabric according to the present invention is that, in addition to the fourth feature, the water-soluble flame retardant is guanidine phosphate.

  The sixth feature of the woven or knitted fabric according to the present invention is that, in addition to the second, third, fourth and fifth features, the aqueous resin composition contains a coloring component.

The thickness of natural pulp paper having a basis weight of 40 g / m ² is generally 50 μm or less, and a paper tape having a width of 1.5 mm has a cross-sectional flatness of 30. Accordingly, the flatness of the cross section of the paper tape having a width of 1.5 to 15 mm obtained by cutting the natural pulp paper having a basis weight of 10 to 40 g / m ² used in the present invention is 30 or more.
When you start to twist such a thin and flat paper tape, the paper tape twists at several points according to the number of twists, and the paper tape is folded in two in the width direction, and the space between the overlapping front and back paper surfaces A gap 14 is generated.
If twisting continues, twisting occurs substantially evenly over the entire length of the paper tape, the entire paper tape is folded twice, and an internal gap 14 is generated between the front and back paper surfaces over the entire length of the paper tape.
If the twisting is continued, fine twists 20 are generated in some places, the paper tape is squeezed in the width direction, and the paper tape having a flat cross section is transformed into a paper thread having a circular cross section.
When the width is reduced by narrowing down in this way, warps that continue in the length direction of the paper thread are generated, and the internal gaps 14 of the paper thread are finely divided according to the number of the warps, and at the same time along the warp Grooves (19) are generated outside, and the external groove gaps 19 appear as fine lines on the peripheral surface of the paper yarn.

The internal gap 14 and the external groove gap 19 generated in this way are narrowed as the number of twists increases, and the paper surfaces facing each other in the gaps 14 and 19 are firmly adhered, and finally closed.
In the closed state, a flowable composition or liquid such as an aqueous resin composition or dye liquor does not penetrate into the paper yarn, adheres only to the peripheral surface of the paper yarn, and wets only the peripheral surface of the paper yarn. Swell.
Then, the peripheral surface of the swollen paper yarn becomes a water-stopping layer, and the water-based resin composition, the dye liquor and the like are more difficult to penetrate into the paper yarn.
In this regard, since the paper tape before twisting has no internal gap 14 or external groove 19, the viscous liquid is absorbed into the fine gap between the natural pulp fibers constituting the paper tape or inside the fiber. However, in the water-based resin composition in which the resin particles are finely dispersed and viscous, the resin particles are not absorbed by the paper tape, but only adhere to the outer surface of the paper tape so as to be filtered out by the filter paper.
The sweet twisted paper yarn 11 of the present invention is obtained by twisting a paper tape having a width of 1.5 to 15 mm obtained by cutting a natural pulp paper-making paper having a basis weight of 10 to 40 g / m ^2. And the outer groove gap 19 is formed, and the number of twists is as small as 40 to 200 turns / m. Therefore, the inner gap 14 and the outer groove gap 19 are interposed without being closed, and the inner space sandwiched between the paper surface and the paper surface. A capillary phenomenon occurs in the gap 14 and the outer groove gap 19.

For this reason, in the sweet-twisted paper yarn 11 of the present invention, even if the aqueous resin composition is viscous, it penetrates and adheres to the internal gap 14 or the external groove gap 19, and the sweet-twisted paper yarn 11 is sweet-twisted by the fixed aqueous resin composition. Water resistance is imparted to the paper thread 11.
If the water-based resin composition 13 contains a coloring component, the basis weight of the natural pulp paper is 10 to 40 g / m ^2, so that the color of the coloring component adhering to the internal gap 14 or the external groove gap 19 oozes out. If the twisted paper yarn 11 is colored and contains functional substances such as flame retardants, deodorants, fragrances, antibacterial agents, pest repellents, ultraviolet absorbers, infrared absorbers, etc., the functions of those substances Properties are imparted to the twisted paper yarn 11.
Since the coloring component and the functional substance are fixed to the internal gap 14 and the external groove gap 19 that cannot be scraped from the outside, they have water resistance, high durability, and no discoloration. A paper woven or knitted fabric excellent in functionality is obtained.

The peripheral surface of the sweet twisted paper yarn 11, that is, between the adjacent twists 20 and 20, is a flat surface on which the aqueous resin composition is likely to sag.
For this reason, only the water-based resin composition with which the peripheral surface is wetted is fixed to the peripheral surface of the sweet-twisted paper yarn 11, and an ultrathin film is formed by the water-based resin composition that is slightly fixed without dripping. Will be.
If the water-based resin composition is fixed to the internal gap 14 or the external groove gap 19, the fixed water-based resin composition imparts necessary physical properties and functionality to the paper thread 11. It is not necessary to thicken the water-based resin composition and fix the thick water-based resin composition to the peripheral surface of the sweet-twisted paper yarn 11. If the water-based resin composition is thickened instead, the inner gap 14 or the outer groove gap 19 due to capillary action The penetration effect is diminished.
Thus, since it is not necessary to thicken the aqueous resin composition, the aqueous resin composition forms an ultrathin film on the peripheral surface of the sweet twisted paper yarn 11.

As such, the water-based resin composition is easy to be applied, and the water-based resin composition to be applied is adsorbed and held in the internal gap 14 and the external groove gap 19 where the skin does not directly touch the skin. A woven or knitted fabric capable of imparting necessary physical properties and functionality such as water resistance and flame retardancy without impairing the feel and texture inherent to papermaking can be obtained.
As such, the water-based resin composition is adsorbed and held in the internal gap 14 or the external groove gap 19, so that the strong twisted portion 21 having the large internal gap 14 or the external groove gap 19 has few internal gaps 14 or external groove gaps 19. More water-based resin composition is adsorbed and held than the sweet-twisted portion 22.
Therefore, if the aqueous resin composition 13 contains a coloring component, the strong twisted portion 21 will be darker than the sweet twisted portion 22, and the appearance of the strong twisted portion 21 and the sweet twisted portion 22 will be described. The above difference becomes clearer, and the gradation pattern drawn by the difference in appearance between the strong twist portion 21 and the sweet twist portion 22 becomes clearer.

In the present invention, the reason for setting the number of twists to 40 times / m or more is that a twist 20 is generated over the entire length of the paper tape to be twisted to form the internal gap 14.
The reason why the number of twists is 200 times / m or less is to allow the internal gap 14 to be interposed without being closed and to cause capillary action over the entire length of the paper tape.
At the same time, a paper tape having a basis weight of 10 to 40 g / m ² , a width of 1.5 mm, and a cross-sectional flatness of 30 or less is twisted in a range where the twist number is 40 to 200 times / m. When the paper tape is not evenly generated over the entire length of the paper tape, the paper tape is twisted and folded into two, so that the pitch of the twist 20 is long and the flat tape-like thick tape-like thick twisted portion 22 is twisted. And a dense thin strong twisted portion 21 having a long twisted number with a twisted pitch 20 deformed into a circular cross-sectional shape like a real twisted spun yarn by narrowing the paper tape is randomly generated, and the sweet twisted paper yarn is a slab yarn. It presents a view like a design twisted yarn or a kite yarn such as Nep yarn.

  Therefore, the paper woven or knitted fabric according to the present invention has a gradation pattern due to the difference in appearance between the sweet twisted portion 22 and the strong twisted portion 21, and has high added value in terms of design. The sweet-twisted portion 22 that maintains the cross-sectional shape and looks thick has the same fineness as the strong-twisted portion 21 that deforms into a circular cross-sectional shape and looks thin, and the sweet-twisted portion 22 is a flattened shape that is folded in two. Since it has a cross-sectional shape, it is easy to bend as compared to the strong twisted portion 21 and is rich in flexibility as a whole woven or knitted fabric, and the sweet-twisted paper yarn is made of vegetable fiber yarn such as cotton fiber or hemp fiber. Similarly, even if natural pulp, which is vegetable fiber, is used as a raw material, the length direction of the plant fiber (natural pulp) is not aligned in a certain direction, so it does not expand or contract even if it absorbs moisture, and is dimensionally stable. Because of its superior properties, it can be used for roll screens and panel curtains. It becomes suitable to ten destinations.

The sweet-twisted portion 22 that maintains a flat cross-sectional shape and looks thicker is in contact with a base material such as cardboard, backing paper, backing paper, etc. than the strong-twisted portion 21 that is deformed into a circular cross-sectional shape and looks thin. Therefore, the woven or knitted fabric according to the present invention is suitable for a wall interior material, a surface material, and the like that are used by being bonded to the base material.
In particular, when the paper woven or knitted fabric according to the present invention is bonded to a backing paper and used as a wall interior material or a surface covering material, a water-based adhesive may be applied to the back surface in order to bond it to a wall surface substrate or the like. The natural woven fabric and the backing paper both absorb natural moisture and swell easily. Therefore, there is no difference in expansion and contraction due to the difference in wet swelling. Therefore, the edge due to the difference in expansion and contraction does not occur. Therefore, a wall covering interior material, a covering material, and the like that are easy to construct can be obtained.

  In addition, sweet twisted paper yarns are colorants, flame retardants and deodorants, fragrances, antibacterial agents, pest repellents, ultraviolet absorbers, infrared absorbers, compared with vegetable fiber yarns such as cotton fibers and hemp fibers. It is easy to adsorb functional substances such as flame retardants, especially when fire retardant is applied, paper yarns carbonize in contact with the flame and change to non-combustible material similar to carbon fiber, so non-combustible curtains and non-combustible wall interior materials The present invention is very advantageous in obtaining

  As described above, according to the present invention, the feel and texture unique to natural pulp papermaking are maintained, and a gradation pattern due to the difference in appearance between the sweet-twisted portion 22 and the strong-twisted portion 21 is drawn and added to the design. It is possible to obtain a paper woven or knitted fabric that is highly valuable and forms a paper thread suitable for curtains such as roll screens and panel curtains, wall interior materials, and exterior materials.

In the present invention, “woven / knitted fabric” is a general term for woven fabric and knitted fabric, and the knitted fabric includes weft knitted fabric and warp knitted fabric. Sweet twisted paper yarn is preferably applied to all yarns constituting the woven or knitted fabric. However, in woven fabric, normal fiber yarn is used for warp, paper yarn is used only for weft, and warp knitting. In cloth, paper thread can be used only for insertion thread that does not form a needle loop.
When using sweet-twisted paper yarn in combination with fiber yarns such as ordinary spun yarn and multifilament yarn, the fineness of the sweet-twisted paper yarn is thicker than that of the fiber yarn, and the feel and texture unique to natural pulp papermaking Is not damaged by the fiber yarns.

As the sweet twisted paper yarn, ultrathin papermaking paper having a basis weight of 10 to 20 g / m ² , preferably Japanese paper, is used, and the width of the paper tape is 2 to 10 mm, preferably 2 to 5 mm.
If the width of the paper tape is reduced in this way, the internal gap 14 and the external groove gap 19 generated in the sweet-twisted paper yarn are also fine and are not easily crushed.
The twist number (H) of the strong twist portion 21 and the twist number (L) of the sweet twist portion 22 are respectively measured by comparing the twist numbers of the sweet twisted paper yarn with a length of 2 cm. The number of twists (H) of the twisted portion 22 (L)
The average number of twists of the sweet-twisted paper yarn 11 is set to be 3 times or more, preferably 5 times or more.
As the number of twists increases, the pitch between the twists 20 is averaged, the paper tape is squeezed and deformed into a circular cross-sectional shape like an actual twisted spun yarn, and the strong twist part 21 and the sweet twist part 22 The difference is less.
Therefore, in order to obtain the sweet-twisted paper yarn 11 having a clear difference between the strong twisted portion 21 and the sweet-twisted portion 22, the average twist number is set to 100 times / m or less, preferably 45 to 75 times / m. It is recommended to use an ultrathin paper having a basis weight of about 15 g / m ² and to set the width of the paper tape to 2 to 5 mm.

The fineness of the twisted paper yarns comprising a paper tape having a width of 2 mm, a paper tape having a width of 4 mm, and a paper tape having a width of 10 mm using an ultrathin paper having a basis weight of about 15 g / m ² is approximately 300 dtex, 600 dtex, and 1500 dtex, respectively.
The fineness of the twisted paper yarns of a paper tape having a width of 2 mm, a paper tape having a width of 4 mm, and a paper tape having a width of 10 mm using an ultrathin paper having a basis weight of about 40 g / m ² is approximately 800 dtex, 1600 dtex, and 4000 dtex, respectively.
When a thick twisted paper yarn having a fineness exceeding 5000 dtex is used, the flexibility of the woven or knitted fabric is impaired, and it is difficult to obtain a woven or knitted fabric suitable for curtains, wall interior materials, surface materials, and the like.
However, a thick paper thread exceeding 5000 dtex may be required due to the design configuration of the woven / knitted fabric.
In such a case, not a thick twisted paper yarn exceeding 5000 dtex, but a twisted paper yarn less than 2000 dtex, preferably a twisted paper yarn less than 1000 dtex, for example, an ultrathin paper having a basis weight of around 15 g / m ^2. Lily yarn consisting of a twisted paper yarn of about 600 dtex formed on a paper tape having a width of 4 mm using paper making, for example, a warp knitted lyre yarn in which twisted paper yarn of about 600 dtex is knitted into a chain by a warp knitting machine, or a plurality of about 600 dtex It is recommended to use a braided lily yarn assembled from a twisted paper yarn.

The water-based resin composition applied to the sweet twisted paper yarn includes vinyl acetate resin emulsion, ethylene / vinyl acetate copolymer emulsion, ethylene / vinyl acetate / vinyl chloride terpolymer emulsion, vinyl acetate / acrylic acid copolymer. Vinyl acetate emulsion resin such as emulsion is used, but it is desirable to use modified vinyl acetate / acrylic copolymer emulsion or ethylene / vinyl acetate / vinyl chloride terpolymer emulsion from the viewpoint of water resistance. Uses a terpolymer emulsion of ethylene / vinyl acetate / vinyl chloride for imparting a hard paper feel to the sweet-twisted paper yarn.
As a water-based resin composition containing a coloring component, it is good to use the water-based paint which forms a dry coating film like the stain paint which mix | blended the pigment with the terpene resin which uses linseed oil and pine spruce as a starting material.
As an aqueous resin composition containing a coloring component, persimmon can be used. In this case, the coloring component is subjected to a color treatment with a mordant.
The coloring component may be any of sap such as dyes, pigments, and persimmons.

The application amount (dry mass) of the aqueous resin composition to the sweet-twisted paper yarn is set to be equal to or less than the weight of the sweet-twisted paper yarn. That is, the application amount of the aqueous resin composition having a basis weight for the textile fabric of 100 g / m ² (dry mass) is, 100 g / m ² or less, preferably between 70~95g / m ^2.

The water-based resin composition is directly applied to the twisted sweet-twisted paper yarn itself, not to the natural pulp papermaking or paper tape that is the raw material of the sweet-twisted paper yarn.
This is because when applied to natural pulp papermaking paper or paper tape, there is no point in providing the internal gap 14 and the external groove gap 19 for adsorbing and holding the aqueous resin composition in the sweet-twisted paper yarn.
The water-based resin composition may be applied to the sweet twisted paper yarn before constituting the woven or knitted fabric, or may be applied to the sweet twisted paper yarn constituting the woven or knitted fabric, that is, the paper woven or knitted fabric. Good.
However, when it is applied to the woven or knitted fabric, the sweet-twisted paper yarn and the sweet-twisted paper yarn entangled in the woven stitch are bonded and fixed by the aqueous resin composition, and the dimensional and shape stability of the woven / knitted fabric is increased.

As the flame retardant compounded in the aqueous resin composition in order to make the sweet-twisted paper yarn incombustible, ammonium polyphosphate, ammonium sulfate, and guanidine phosphate are preferably used.
In particular, when an ethylene / vinyl acetate / vinyl chloride terpolymer emulsion is used in an aqueous resin composition, it is desirable to blend guanidine phosphate as a flame retardant.
For non-flammable paper weaving knitted fabric, the basis weight of the coarse to textile fabric woven density and knitting density 120 g / m ² or less, preferably in 90~100g / m ^2, phosphorus for paper weaving knit fabric It is desirable that the adhesion amount of acid guanidine is 20 to 30 g / m ² .

In the present invention, since the flame retardant is present together with the aqueous resin composition in the internal gap 14 and the external groove gap 19 where the flame does not directly contact the flame, it is immediately decomposed in contact with the flame and gradually released without releasing the nonflammable gas. Will do.
As such, in the process of gradually releasing the non-combustible gas, the sweet-twisted paper yarn is heated at high temperature and carbonized, becomes a non-combustible carbide similar to carbon fiber, and does not completely disappear as ash, Generation of combustible decomposition gas is suppressed by the residue generated as the incombustible carbide.
That is, the paper woven or knitted fabric does not disappear as ash in a flame, and the shape as a non-combustible woven or knitted fabric made of carbon fiber is retained.
Since the paper woven / knitted fabric having such a high flameproof performance can be obtained, the paper woven / knitted fabric of the present invention is particularly suitable for curtains and wall interior materials for automobiles, trains, aircraft, etc. that require high flameproof performance. It is.

The paper woven / knitted fabric can be embossed.
The embossing does not need to be performed so that a part of one side of the woven or knitted fabric is pushed out to the other side, and so-called paper embossing to such an extent that the internal gap 14 and the external groove gap 19 of the paper yarn 11 are crushed and deformed. It's okay.
This is because the sweet-twisted paper yarn does not have viscoelasticity unlike the fiber yarn, almost completely plastically deforms, and does not recover its original shape over time.
And in the pressed part with embossed shape, the knitted line (twisted mountain) is crushed to become a smooth surface, and it is clear due to the fine undulations due to the knitted line (twisted mountain) and the surface gloss difference from the non-pressed part with unevenness. It is because it is caught by.
Therefore, the paper woven or knitted fabric according to the present invention is also practical in that the pattern can be easily and efficiently drawn by embossing without drawing the pattern by a patterning device such as jacquard or dobby. It is.

1 is a perspective view of a paper woven / knitted fabric according to the present invention. 1 is a perspective view of a sweet twisted paper yarn according to the present invention.

Explanation of symbols

11: Paper yarn 12: Woven stitch 14: Internal gap 19: External groove gap 20: Twist 21: Strong twist 22: Sweet twist

Claims (6)

It is formed by twisting a paper tape having a width of 1.5 to 15 mm formed by cutting a natural pulp paper having a basis weight of 10 to 40 g / m ^2. The average number of twists is 40 to 200 times / m, and there are twist spots. A twisted paper yarn (11) in which the number of twists (H) of the strong twisted part (21) with the maximum number of twists is three times or more the number of twists (L) of the sweetly twisted part (22) with the minimum number of twists ) Are woven and knitted, and a woven and knitted fabric in which a woven fabric pattern is depicted due to a difference in appearance between the strong twist portion (21) and the sweet twist portion (22).   There is a gap (14, 19) inside the sweet twisted paper yarn (11), the aqueous resin composition is applied to the sweet twisted paper yarn (11), and the aqueous resin composition is of the sweet twisted paper yarn (11). 2. A knitted and knitted fabric according to claim 1, wherein the woven fabric is infiltrated and fixed in an internal gap (14, 19).   3. A knitted fabric according to claim 1, wherein the interwoven paper yarns in the woven stitch (12) are joined together by an aqueous resin composition.   4. A knitted fabric according to claim 2, wherein the aqueous resin composition contains a water-soluble flame retardant.   The knit-woven fabric according to claim 4, wherein the water-soluble flame retardant is guanidine phosphate.   6. The woven fabric according to claim 2, wherein the water-based resin composition contains a coloring component.

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