JP2007216488A - Underlay and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably supply a sheet underlay which substantially prevents slippage of Japanese paper or the like, necessitates no weight of a load, enables close contact of the whole paper with it and comes into excellent contact with a desk or a drawing board, on the occasion of drawing paintings or calligraphic works, and moreover which is hardly stained with Japanese ink or ordinary ink and excellent in drawing workability. <P>SOLUTION: A nonwoven fabric which contains random loops prepared by using an extra-fine synthetic fiber bundle of 1 dtex or less is used for the underlay. The extra-fine fiber bundle consists of 16-200 extra-fine synthetic fibers. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paperwork, cloth underlay, etc. on which paper is hard to slip and paper can be easily peeled upward, and a method for producing the same.

Conventionally, when writing letters or pictures on Japanese paper with a brush or pen, a non-woven fabric made of natural fibers such as wool is placed underneath, and Japanese paper is placed on top of it to prevent slipping and shifting of the Japanese paper. This is done with paperweights. In particular, if Japanese paper or the like is misaligned, the drawing workability will be hindered. To improve the workability, loads such as paperweights have to be placed at various locations, which further hinders workability. .
In order to solve this problem, a non-woven fabric printing underlay using fibers obtained by the melt-blowing method, and a paper underlay on which the paper placed thereon does not slip even without using a weight, has been proposed. (Patent Document 1). In this document, when forming a continuous fiber by extruding the molten resin from the die by the melt blow method, a non-woven fabric is formed by blowing a gas such as high-temperature, high-speed air from the vicinity of the die and collecting the fiber while drawing it. Has been.

However, such an underlay has a problem that the paper is difficult to be removed but is still insufficient. In addition, when drawing a calligraphy, ink or ink penetrates the underlay from Japanese paper, etc., contaminating the underlay, and in ink or watercolor paintings that draw subtle color changes with ink or ink, the contaminated underlay is stained in Japanese paper, etc. There is a problem that the color tone expression is hindered because the undertone stains are seen through the Japanese paper and the like.
Japanese Utility Model Publication No. 1-97994

  In view of the background of the prior art, an object of the present invention is to provide an underlay that Japanese paper or the like is not in close contact with and is not easily displaced when drawing a document and is not easily contaminated with ink or ink.

  In order to solve the above problems, the present invention employs the following means.

  (1) An underlay using a non-woven fabric comprising a random loop using an ultrafine synthetic fiber bundle of 1 dtex or less.

  (2) The underlay according to (1) above, wherein the ultrafine fiber bundle is composed of 16 or more and 200 or less ultrafine synthetic fibers.

  (3) The underlay described in (1) or (2) above, wherein the underlay is used for a purpose selected from a document, a bulletin board and a dressmaking.

  (4) The underlay according to any one of (1) to (3), wherein the ultrafine synthetic fiber is at least one selected from a polyester fiber, a polyamide fiber, and an acrylic fiber.

  (5) The paper underlay according to any one of (1) to (4), comprising a water-repellent compound on the fiber surface of the nonwoven fabric.

  (6) The paper underlay according to the above (5), wherein the water repellent compound is a fluorine compound.

  (7) The paper underlay according to (5) or (6) above, wherein the water repellency according to the spray method specified in JIS L 1092 is 3 or more.

  (8) After forming a web using a conjugate fiber composed of two or more components, the conjugate fiber is made into an entangled nonwoven fabric by a needle punch method, and then at least one component of the conjugate fiber component is eluted and removed, or An underlay manufacturing method in which a composite fiber is divided into different fine components to form an ultrafine synthetic fiber of 1 dtex or less.

  (9) The method for producing an underlay according to the above (8), wherein the underlay is used for a purpose selected from a document, a bulletin board and a dressmaking.

  (10) The method for producing an underlay according to the above (9) or (10), wherein the ultrafine synthetic fiber is at least one selected from a polyester fiber, a polyamide fiber and an acrylic fiber.

  (11) The method for producing an underlay according to any one of the above (8) to (10), wherein an ultrafine synthetic fiber of 1 dtex or less is formed and then a water repellent compound is added.

  (12) The method for producing an underlay according to the above (11), wherein the water repellent compound is a fluorine compound.

  According to the present invention, when drawing a document on Japanese paper or the like, the Japanese paper or the like is less likely to slip and slip, and no load is required, and the entire paper can be in close contact with the underlay. The underlay can adhere well to a desk or drawing board. Furthermore, since it is difficult to get smudged with ink or ink, it is possible to stably supply a paper underlay excellent in drawing workability.

  The underlay of the present invention has a functional feature of maintaining a frictional force between the paper and the underlay. The characteristic of the frictional force is given by the structure and properties of the fabric.

  The underlay of the present invention comprises a random loop composed of fiber bundles of ultrafine synthetic fibers of 1 dtex or less. In the underlay of the present invention, after forming a web using a composite fiber composed of two or more components, the composite fiber is made into an entangled nonwoven fabric by a needle punch method, and then at least one component of the composite fiber component is eluted and removed. Alternatively, it can be obtained by dividing the composite fiber into different fine components to obtain an ultrafine synthetic fiber of 1 dtex or less. Since the entangled nonwoven fabric made of the composite fiber is formed by the Niddle punch method, a random loop composed of large and small loops is formed. Even after elution and removal of at least one component of the composite fiber component in the entangled nonwoven fabric, the random loop is maintained, and the fiber bundle of ultrafine fibers of 1 dtex or less (hereinafter, the fiber bundle of ultrafine synthetic fibers is referred to as the ultrafine fiber bundle). A random loop is formed.

  In the underlay of the present invention, an ultrafine synthetic fiber of 1 dtex or less is used in order to obtain an anti-slip effect. As the thickness of the ultrafine fiber, it is preferable to use a fiber having a single yarn fineness of 0.001 to 1 dtex in consideration of ease of production, cost and the like. .5 decitex is preferred. The extra fine fibers are flexible and have excellent adhesion to Japanese paper and the like, so that the effect of preventing slipping of the Japanese paper is exhibited. The ultrafine fibers may be long fibers or short fibers. In the present invention, the fibers constituting the underlay contain 50% by weight or more of ultrafine fibers, and more preferably 70% by weight or more. As other fibers mixed with the ultrafine fibers, natural fibers, synthetic fibers having a large single yarn fineness, and the like can be used.

  The ultrafine fiber bundle is preferably composed of 16 or more and 200 or less ultrafine synthetic fibers. By setting it within this range, the fibers constituting the Japanese paper or the like are caught and friction is easily generated.

  The ultrafine synthetic fiber of the present invention is not particularly limited, but includes polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, L-lactic acid as a main component, polyester fiber obtained by copolymerizing these with a third component, nylon 6 or nylon. Polyamide fiber such as 66, polyacryl fiber mainly composed of polyacrylonitrile, polyolefin fiber such as polyethylene and polypropylene, polyvinyl chloride fiber and the like are used. Of these, polyester fibers and polyamide fibers are preferably used in terms of flexibility and practicality.

  In the present invention, the ultrafine synthetic fiber is produced using a composite fiber composed of two or more components. Examples of the component of the composite fiber include combinations of polyester and polyamide, polyester and polystyrene, polyamide and polystyrene, polyacryl and polyamide, polyacryl and polyester, polyacryl and polystyrene, and the like. Examples of the form include a sea-island structure and a mandarin orange type.

  Examples of the method for forming the ultrafine synthetic fiber include a method of removing sea components having a sea-island structure and a method of dividing different components of the mandarin orange for each component.

  In the present invention, a non-woven fabric is used in order to suppress yarn flaking from the cut surface when the underlay is cut into a predetermined size with a blade or the like.

  In the nonwoven fabric of the present invention, it is preferable to provide a water repellent compound in order to impart excellent water repellency. As the water repellent compound, at least one of a fluorine compound and a silicon compound can be used, and among them, a fluorine compound can be preferably used. As the fluorine-based compound, compounds generally used for water / oil repellent finishing of fiber fabrics can be used. For example, polypentadecafluorooctyl acrylate, polytrifluoroethyl acrylate, tetrafluoroethylene-hexafluoropropylene Copolymers and the like can be used.

  Regarding the water repellency of the nonwoven fabric of the present invention, the water repellency measured by the spray method specified in JIS L 1092 is preferably 3 or more, and more preferably 4 or more. By setting the water repellency to such a level, it is possible to obtain a fabric that is hardly contaminated with black ink or ink. As the water-repellent compound, other compounds such as an ultraviolet absorber, a light stabilizer, a lubricant, a lubricant, an inorganic particle, an organic particle, an antistatic agent, a deodorant, and an antibacterial agent are used as long as the effects of the present invention are not impaired. Flame retardants, colorants, antifouling agents, etc. may be added.

  The method for manufacturing the underlay of the present invention will be described below.

  In the present invention, after forming a web using a conjugate fiber composed of two or more components, the conjugate fiber is made into an entangled nonwoven fabric by a needle punch method, and then at least one component of the conjugate fiber component is eluted and removed. Or an underlay can be manufactured by dividing | segmenting a composite fiber for every different component, and setting it as an ultra fine synthetic fiber below 1 dtex. The ultrafine fiber of the present invention has a relatively uniform single fiber warp by being formed by these methods.

  A web is manufactured by using a normal process to make a cotton assembly of a certain thickness in a card machine. Further, a nonwoven fabric is obtained by entanglement of fibers using a needle punch machine on such a web. The surface of the obtained nonwoven fabric is composed of large and small loops and fluff at the end of single fibers.

  When at least one component of the composite fiber components of the obtained nonwoven fabric is eluted and removed, the large and small loops on the surface of the nonwoven fabric and the fluff at the end of the single fiber are made into ultrafine fibers, and an ultrafine synthetic fiber bundle is formed. Alternatively, in the composite fiber of the nonwoven fabric obtained as described above, the composite fiber can be made into ultrafine fibers by dividing each of the different components, and an ultrafine synthetic fiber bundle is formed.

  When loops made of this ultra-fine synthetic fiber bundle or fluff made of ultra-fine fibers are piled up on a half-paper, it becomes entangled with the fluff on the surface of the paper. Is produced.

  Furthermore, when providing a water repellent compound on a nonwoven fabric, an example of the method is given below.

  A method of immersing a nonwoven fabric in an aqueous dispersion of a water repellent compound, squeezing with a mangle or the like so as to obtain a predetermined adhesion amount, drying at 100 to 140 ° C., and heat-treating at 160 to 200 ° C. A method of spraying the body with a spray or the like and drying and heat-treating the body can be used. The water repellent compound may be attached to both sides of the nonwoven fabric or only on one side, and can be selected according to the purpose.

  The underlay obtained according to the present invention exhibits a stick-slip phenomenon as a friction characteristic in at least one direction when the warp direction or width direction comrades on the surface of the fabric are rubbed together. Furthermore, the movement distance of the fabric to the point indicating the static friction coefficient is 1 cm or less, and further, the inclination when the start point of friction and the static friction coefficient point are connected by a straight line, that is, the relationship between the movement distance of the fabric and the load is 300 g / cm or more. It shows the property.

  The stick-slip phenomenon indicates that the static friction coefficient is greater than the dynamic friction coefficient, and indicates that the fabrics are difficult to slip. Furthermore, if the movement distance of the fabric until it shows the coefficient of static friction is as small as 1 cm or less, it indicates that it is difficult to move, and the slope of the straight line connecting the starting point and the static friction point from the relationship between the movement distance and the load is as large as 300 g / cm. The fact that the fabric is difficult to move, and satisfying these three characteristics at the same time means that when the paper is drawn on the fabric and the document is drawn with a brush or the like, the Japanese paper is not easily displaced and the work is easy. Show.

  The underlay having the functionality of the present invention can be used alone as a underlay for writing, used on a drawing board, or attached to a bulletin board to attach paper or the like. It can also be used effectively as a cloth underlay for dressmaking.

  EXAMPLES Next, although an Example demonstrates this invention in detail, this invention is not limited to these. Various performances in the examples are evaluated by the following methods.

(Coefficient of friction)
It measured on the following conditions using the friction coefficient measuring machine made by Koa Shoji.

  A cloth having a width of 5 cm and a length of 7 cm was set and fixed as a top cloth on a sample holder, and a load of 300 g was placed. Set the cloth of 7cm width and 17cm length to the sample holder, move the lower cloth, measure the stress at that time with U gauge, record the moving distance and stress on the chart, stick slip, static friction coefficient The friction characteristics were measured by reading the dynamic friction coefficient, moving distance, and stress.

(Water repellency)
Evaluation was made by the spray method prescribed in JIS L 1092 “Test method for waterproofness of textile products” (1998), and the grade was determined.

Example 1
This is a composite fiber composed of polyethylene terephthalate as an island component and polystyrene as a sea component, with a weight ratio of 80/20, an island number of 16 and 3.3 dtex, and a fiber length of 51 mm and a crimp number of 5.5 mountains / cm. A web was prepared using fiber raw cotton through the steps of a card and a cross wrapper, and then 250 needles / cm ² were needle punched to obtain a pre-felt. On both surfaces of the pre-felt, 750-36f, raw silk (drawn yarn) of twist number 2000T / m strong twisted Tsukai of plain weave fabric after uniformly spread bonded together (basis weight 90 g / m ^2), of 2,000 / cm ² Needle punching was performed to obtain a felt having a basis weight of 650 g / m ² .

  After the felt was shrunk in hot water at 95 ° C., it was impregnated with an 18% water dilution of an oriurethane dispersion “Permarin UA150” (manufactured by Sanyo Chemical Industries, Ltd.) and dried in hot air.

  When the surface of the obtained nonwoven fabric was observed using an electron scanning microscope, loops having random sizes were formed, and each loop was composed of about 30 to 50 ultrafine fibers.

  As a result of measuring the friction characteristics when the obtained nonwoven fabrics were overlapped in the vertical direction and when the horizontal directions were overlapped, the stick-slip characteristics were shown in both cases. It was 0.71 / 0.65 and the horizontal direction was 0.71 / 0.65. Furthermore, the movement distance of the fabric to the static friction coefficient point is 0.47 cm in the vertical direction, 0.55 cm in the horizontal direction, the slope connecting the start point and the static friction coefficient point with a straight line, the vertical direction is 455 g / cm, and the horizontal direction is It was 392 g / cm.

  Washi was placed on a non-woven fabric and a brush was used to draw a calligraphy with ink. However, the adhesion between the washi and the fabric was high, and it was not practical for the washi to move. I was able to draw a stable drawing without slipping the underlay and the paper.

Example 2
A nonwoven fabric was obtained in the same manner as in Example 1 except that the nonwoven fabric obtained in Example 1 was subjected to water-repellent processing by the following method.
<Processing liquid>
Water repellent: F-450 (fluorine-based water and oil repellent manufactured by Kyoto Silk Chemical Co., Ltd.) 50 g / L
Cross-linking agent: Sumitex resin M3 (Sumitomo Chemical Co., Ltd. melamine resin) 3 g / L
Catalyst: Sumitex Accelerator ACX (Sumitomo Chemical Co., Ltd. catalyst) 0.5 g / L
The nonwoven fabric was dipped in the water repellent treatment solution, wrung with mangles so that the amount of the treatment solution adhered was 80% by weight, dried at 130 ° C., and pinter set at 170 ° C.

  The resulting nonwoven fabric had a water repellency of 5th grade. Further, as a result of measuring the friction characteristics in the same manner as in Example 1, it showed stick-slip, the moving distance to the static friction coefficient was 0.59 cm in the vertical direction, 0.63 cm in the horizontal direction, the inclination was 365 g / cm in the vertical direction, and the horizontal direction. It was 341 g / cm.

  When a book was drawn in the same manner as in Example 1, the adhesion between the Japanese paper and the nonwoven fabric was good, and the Japanese paper was difficult to slip and the workability was good. Furthermore, since it is water-repellent, it repels the ink penetrating from the Japanese paper and resists contamination, and it has excellent antifouling properties that can be easily removed with a dry cloth or a wet cloth.

Comparative Example 1
Written in the same way as in Example 1 using a school calligraphy floor made of wool (Daiso calligraphy-10), but the Japanese paper and the rug are slippery and fixed with weights all over the Japanese paper. Otherwise, the book could not be written and workability was poor. When the friction characteristics of such a rug were measured, it was found that there was no stick-slip characteristic in both the vertical and horizontal directions, and the cloth did not stop sliding. Further, the maximum load of static friction did not exceed the load of the approximate weight (paperweight), and was slippery.

  In the above-described embodiment of the present invention, the frictional force increases in proportion to the area of the paper to be used. Therefore, in the production of a long strip width, there is a remarkable effect of fixing the paper so that it does not slip in the lateral direction of the paper. In particular, the effect on the kana half paper is great. The thin kana half paper has a drawback in that when a load is applied to a conventional underlay, the periphery floats and the effect of fixing the paper is impaired. On the other hand, the underlay of the present invention can be fixed without load if the entire surface of the paper is held by hand, and therefore has the effect of not floating or shifting during writing.

  Thus, the underlay of the present invention has an effect of having the property of sticking to the underlay over the entire paper surface. In addition, the effect that the document can be stably drawn by the underlay sticking to the desk or the table (easel) is remarkable.

Claims (12)

An underlay using a non-woven fabric comprising a random loop using an ultrafine synthetic fiber bundle of 1 dtex or less. The underlay according to claim 1, wherein the ultrafine fiber bundle comprises 16 or more and 200 or less ultrafine synthetic fibers. 3. The underlay according to claim 1 or 2, wherein the underlay is used for an application selected from a document, a bulletin board and a dressmaking. The underlay according to any one of claims 1 to 3, wherein the ultrafine synthetic fiber is at least one selected from a polyester fiber, a polyamide fiber, and an acrylic fiber. The paper underlay according to any one of claims 1 to 4, comprising a water-repellent compound on a fiber surface of the nonwoven fabric. The paper underlay according to claim 5, wherein the water-repellent compound is a fluorine-based compound. The paper underlay according to claim 5 or 6, wherein the water repellency according to JIS L 1092 defined by JIS L 1092 is 3 or more. After forming a web using a composite fiber composed of two or more components, the composite fiber is made into an entangled nonwoven fabric by a needle punch method, and then at least one component of the composite fiber component is eluted and removed. A method of manufacturing an underlay that is made into ultrafine synthetic fibers of 1 dtex or less by dividing each different component. The method of manufacturing an underlay according to claim 8, wherein the underlay is used for a purpose selected from a document, a bulletin board and a dressmaking. The underlay manufacturing method according to claim 8 or 9, wherein the ultrafine synthetic fiber is at least one selected from a polyester fiber, a polyamide fiber, and an acrylic fiber. The method for producing an underlay according to any one of claims 8 to 10, wherein a water-repellent compound is applied after forming an ultrafine synthetic fiber of 1 dtex or less. The method for producing an underlay according to claim 11, wherein the water repellent compound is a fluorine compound.