JPS62244836A - Copy machine document feed belt - Google Patents

Abstract

PURPOSE:To obtain a document feeding belt which is uniformly brought into contact with a document while having sufficient strength by laminating a film on an nonwoven fabric formed by three-dimensionally entwined fiber by means of fluid, and providing a coating layer chiefly made of synthetic resin, etc. on its surface. CONSTITUTION:A fluid entwined nonwoven fabric 2 is obtained by placing, e.g., a fiber web on a supporting body, handling it with a water stream jetted out of a nozzle, and three-dimensionally entwining the fiber in the web. The tearing strength in the longitudinal direction of this fluid entwined nonwoven fabric 2 is desirably at least 0.5kg and, normally, it is preferable to be more than 1.0kg. And, a film 3 is laminated on this nonwoven fabric 2 while a coating layer 4 chiefly made of synthetic rubber or synthetic resin is provided on the surface of the film 3, to hold and accurately convey a document. Also, in the coating layer 4, an inorganic filler such as clay, titanium oxide active China clay talc, etc. are contained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document feed belt used in a document feed device of a copying machine.

[Prior art]

Currently, rubber belts made of urethane, NBR, 8BH, etc., or belts made of woven fabric coated with a rubber component are used as belts for automatic document feeders of copying machines. However, rubber belts are generally 0.7 to 2.0
It is relatively heavy and requires a large amount of force to drive the belt, which has the disadvantage that the drive device becomes large and power consumption increases. On the other hand, belts made of woven fabric coated with a rubber component are lighter than rubber belts, but are generally harder and have poor adhesion to the drive roll, which can cause slippage in mJ between the belt and the roll. Moreover, since the woven fabric is easily deformed in the bias direction, the belt is likely to wrinkle, and the document may not be conveyed to an accurate position.

In order to solve these problems, the present inventor investigated the production of a belt by coating a rubber component on a resin-impregnated nonwoven fabric, a fiber-bonded nonwoven fabric, a two-dolpa/chi nonwoven fabric, etc. However, the nonwoven fabric surface that comes into contact with the drive roll has poor abrasion resistance and is easily torn by the snaking prevention claws. On the other hand, when the fiber weight of needle-punched nonwoven fabrics is reduced to 150 yr or less, the fibers become virtually difficult to entangle due to mechanical limitations, resulting in a decrease in tensile strength and tear strength. If strength is emphasized, the weight of the fibers must be increased, making the resulting belt heavy, making it unsuitable for use as a copying machine document feed belt.Furthermore, nonwoven fabrics coated directly with rubber components do not coat the surface of the coating layer. It also suffers from the disadvantage that irregular irregularities tend to appear and the contact with the original is not uniform.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and is lightweight and has sufficient strength.Moreover, the surface in contact with the drive roll has poor abrasion resistance, and the surface in contact with the document has poor abrasion resistance. An object of the present invention is to provide a document feed belt for a copying machine that enables uniform contact with a document.

[Structure of the invention]

In the present invention, a nonwoven fabric (hereinafter referred to as "fluid entangled nonwoven fabric") in which fibers are three-dimensionally entangled by a fluid is laminated with a film, and the surface of the film is mainly made of synthetic rubber or synthetic resin. This document feed belt for a copying machine is characterized in that it is provided with a coating layer that provides a coating layer.

The present invention will be explained below with reference to the drawings. FIG. 1 is a sectional view of the document feed belt (1) of the present invention.

The fluid-entangled nonwoven fabric (2) used in the present invention can be produced by, for example, placing a fibrous web on a support 1 and treating it with a water stream jetted from a nozzle to three-dimensionally entangle the fibers in the web. It can be obtained by The fibers that make up the above fiber web include synthetic fibers such as polyester, polyamide, and polyolefin, regenerated fibers such as rayon, and cotton.

Any fiber can be used, including natural fibers such as wool. This fiber web is made of metal and rubber.

It is placed on a perforated or non-porous band-shaped, plate-shaped, roll-shaped support made of plastic or the like, and subjected to fluid entanglement treatment. A water stream jetted from a nozzle is used as the fluid, and the nozzle usually has a nozzle diameter of 0.05 to Q, 5.
fl and a nozzle spacing of 0.5 to tour are used, and a jet pressure of 7 to 120 I is applied to the fiber web in the form of a columnar flow.

This fluid-entangled nonwoven fabric can be either porous or non-porous, depending on the support used and fluid treatment conditions. Either type can be used in the present invention, but non-porous fabrics have a higher density. Since there is no difference and the surface is flat, there are no shadows from the light source used in the copying machine, which is preferable.

Also, the basis weight of the fluid-entangled nonwoven fabric (2) is 30 to 150 f7
It is desirable to be in the range of 80 flAn°
If it is less than 150 fly, it will be difficult to entangle the fibers evenly and evenly, and the necessary strength will not be obtained.
If W is exceeded, it becomes difficult to reduce the weight of the belt, which is the objective of the present invention.

A particularly preferable fluid-entangled nonwoven fabric has a basis weight of 50 to 100.
It is fyftr. Furthermore, since the constituent fibers of the fluid-entangled nonwoven fabric are intertwined, it has sufficient tear strength to be made into a belt, but it is desirable that the tear strength in the longitudinal direction of the nonwoven fabric is at least 0.5 #. , usually 1.0
# or higher is better. In addition, the fluid-entangled nonwoven fabric may be impregnated with a resin if necessary, and in this case,
~20 (/, M A highly durable nonwoven fabric can be obtained by making it resistant to adhesion.

A film (3) is laminated on the above-mentioned fluid-entangled nonwoven fabric (2) 1. This film (8) is laminated to form a smooth main and coaching layer, so the thickness is 8 to 8.
Any film with a uniform thickness of 800P is acceptable, but it is preferable to use synthetic resin films because they are easy to process, especially ethylene-vinyl acetate and polyurethane films that can be easily integrated with nonwoven fabrics by thermocompression bonding. Films made of thermoplastic resins such as polyvinyl chloride, polyvinyl acetate, etc. are preferred. In addition, if the belt particularly requires cushioning properties, 100 to 700)
A film made of T or W resin foam may also be used. Fluid-entangled nonwoven fabric and film are usually made using a T-die type extruder. Fluid-entangled nonwoven fabric (2
) A coating layer (4) mainly made of synthetic rubber or synthetic resin is provided on the surface of the film (3) laminated with the original film (3) in order to hold and accurately convey the document. Polyurethane, 8BIL (
Elastic materials such as styrene-butadiene rubber), NBR and tolyl 7゛tadie/rubber) are preferably used, and are coated on the film surface in the form of a latex or solution.

In addition, if the original is thin and transparent, if the belt surface is transparent, the texture of the nonwoven fabric used for the belt may show through and be copied along with the original.
The coating layer may contain an inorganic filler such as clay, titanium oxide activated clay talc, etc. in order to improve the concealability of the belt surface.

The obtained bell) (1) has a three-layer structure of a fluid-entangled nonwoven fabric (2), a film (8), and a coating layer (4), and has a major award of 100 to 400 f/Wf and a thickness of 0.8 to 1. 0
It is desirable to become friends.

FIG. 2 shows an example of a copying machine document feeding device using the belt (1) of the present invention. The document feeder basically consists of a document feed belt (1) facing a document tray (5) and a drive roll (6) that drives the belt. It is a mechanism that transports the paper to a predetermined position, and after copying, sends it out from the other mouth.

Generally, a sensor is disposed at a document insertion slot or a document copying position, and a control means for automatically feeding the document is also provided.

In the present invention, after processing/dressing (4) (1) by heat sealing or sewing, the fluid-entangled nonwoven fabric side is attached to the driving roll side and the coating layer is attached to the document side. It will be done. Therefore, on the driving roll side, the belt follows the roll well, there is no transmission loss of driving force, there is no wear on the belt surface, and there is very little wear on the belt surface. Since a smooth coating layer is formed on the original side, the belt and the original can come into uniform contact, and the original can be accurately conveyed to the set position for copying without causing misalignment.

Furthermore, since the belt is lightweight, it is possible to use smaller devices such as a motor that generates the driving force.Despite this, the belt itself has excellent durability such as tensile strength and tear strength, and can be used stably over a long period of time. becomes possible.

[Examples and comparative examples]

Example 1 A polyester fiber web was introduced onto a support made of a metal mesh of 80 mesh, and a nozzle diameter Q of 131
Fml, injection pressure 50ψ from nozzles with nozzle spacing 0.6mm
A non-porous, fluid-entangled nonwoven fabric with a basis weight of t togβ was obtained by applying the water stream discharged in the step 1. After this, a polyacrylic acid ester emulsion 5 fyfd (
solid content).

Improved durability.

Next, after laminating an ethylene-vinyl acetate film 6 on the fluid-entangled nonwoven fabric, a urethane latex l containing 80% by weight of titanium oxide was applied to the surface of the film.
Coated with 20 f, M and dried [15. A belt with a thickness of 0.66 fl was created.

Abrasion resistance and tear strength of the nonwoven surface of this belt.

The 3% modulus strength and breaking strength and elongation were measured by the test methods shown below, and the results are shown in Table 2.

C abrasion resistance) Using a Gakushin type friction tester, the sample piece and Kanakin (JI8-
L-0808) is brought into contact with a load of 200 g, the travel distance of the friction table is set to 1OcIII, the friction table is reciprocated about 30 times per minute, and the fuzz and wear on the sample surface are visually determined after 500 times. The judgment criteria are shown in Table 1.

Table 1 C tear strength) JI8-L-1086 applied mutatis mutandis (%, 53
Hold the XIQQI test piece vertically, take 5 pieces each in the horizontal direction, and use an Elmendorf-type tear strength tester to test the test piece with a sharp knife at the center of both grips of the test piece, approximately at the center of the long side at right angles to the side. Make a 2c11 cut, remaining 4.53
The maximum load (pass) when the material is torn is measured, and the average value is shown.

(Strength at break and elongation) 5ag x 2Qc11 test pieces were taken vertically, five pieces were taken from each side, and tested with a tensile tester according to JI8-L-1068, with a grip interval of 103. Tensile at a tensile rate of 10aI/min, strength at break (kg) and elongation i (%)
is shown as the average value on the scale. However, the time of breakage is defined as the time when the nonwoven fabric is broken.

(3% modulus strength) The test piece was pulled in the same manner as for breaking strength and elongation, and the test piece was 8.
The strength when elongated by % (19>) was measured and is shown as an average value.

Comparative Example 1 A resin-impregnated nonwoven fabric 601yW in which 80% by weight of a polyester fiber web was impregnated with a polyacrylic acid ester emulsion, /2Q 11%-% (solid content) was used as the nonwoven fabric, but in the same manner as in Example 1. , a belt with a diameter of 0.65W was created.

Abrasion resistance and tear strength of the nonwoven surface of this belt.

The 3% modulus 1 lath strength and breaking strength and elongation were measured and the results are shown in Table 2.

Comparative Example 2 As a nonwoven fabric, a fiber-bonded nonwoven fabric with a sealed area of 25%, 95 fA, in which a polyester*M web was partially heat-sealed
A belt having a thickness of 0.65111 mm was produced in the same manner as in Example 1 except that pl was used.

Abrasion resistance and tear strength of the nonwoven surface of this belt.

896 modulus strength and breaking strength and elongation were measured and the results are shown in Table 2.

Table 2 As is clear from Table 2, compared to the belt of Comparative Example 1.2 using a resin-impregnated nonwoven fabric and a fiber-bonded nonwoven fabric, the belt of Example 1 had poor abrasion resistance on the nonwoven fabric surface; Furthermore, the tear strength, especially the tear strength in the longitudinal direction of the belt, was high. Furthermore, when the belt of Comparative Example 1 is repeatedly used, peeling easily occurs between the nonwoven fabric and the film, while the belt of Comparative Example 2 is difficult to stretch and absorb strain applied to the belt, so it is easily broken. However, in Bell) K of Example 1, these problems were not observed at all.

(Effects of the Invention) The document feeding belt of the copying machine of the present invention has high tear strength and tensile strength, and also has excellent wear resistance on the surface that contacts the drive roll, so it can be used for a long time. It has sufficient durability.

Moreover, despite having such durability, the belt of the present invention is extremely lightweight, so the power consumption required to drive the belt can be reduced, and the drive device can be downsized. In addition, since the belt of the present invention is made of a coating layer with a very smooth surface that contacts the original, the belt and the original come into uniform contact, and the original can be accurately conveyed to the copying position. It becomes possible.

As described above, since the belt of the present invention has a soaked property, it is extremely useful as a document feeding belt for a copying machine.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a document feeding belt of a copying machine according to the present invention, and FIG. 2 is a schematic diagram showing an example of a document feeding device of a copying machine using the belt of the present invention. l・・・・・・・・・Belt 2・・・・・・・・・・
・Fluid entangled nonwoven fabric 3...Film
4 songs...Coach ink layer patent applicant Nippon Vilene Co., Ltd. / Nagitomi 2 diagram

Claims (1)

[Claims] 1. A film is laminated with a nonwoven fabric in which fibers are three-dimensionally entangled by a fluid, and a coating layer mainly made of synthetic rubber or synthetic resin is provided on the surface of the film. A copying machine document feed belt characterized by: 2. The document feeding belt for a copying machine according to claim 1, wherein the nonwoven fabric has a longitudinal tear strength of 0.5 kg or more. 3. The document feeding belt for a copying machine according to claim 1 or 2, wherein the coating layer contains an inorganic filler.