JPS6012959B2 - Woven humidifying tube for water rod roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a woven humidifying tube for a water twill roller, and is a novel humidifying tube for use as an outer tube for a rubber roller for water twilling in an offset printing machine to add moisture to a printing plate. It provides:

Conventionally, as humidifying tubes for printing water sticks (particularly called dipping rollers), knitted pile wire products made of cotton or synthetic fibers, velvet products made by cutting the pile, or raised products made by raising the pile have been used.

These products can be provided at a low price because they are relatively thick and the labor costs are low, but the fabric is soft and cannot be used with rollers.
It is difficult to stick firmly, the hair comes off easily, and it is not durable.
Furthermore, the thickness of the base cannot be adjusted, which may result in insufficient water absorption. Since knitted products have such drawbacks, it is conceivable to use woven fabrics, but in order to make the surface smooth, threads that are thin in both warp and warp must be used, or the surface must be raised.

However, even if the yarn count is fine, the triple weave is too thin, resulting in only weak durability and insufficient water absorption. In addition, with normal technology, both ends become ears (hard parts), and the weaving cost is high, and furthermore, it lacks elasticity, making it difficult to cover it with a roller, making it impossible to obtain a product that can be used as an aquatic humidifier. . In view of the current situation, the present invention was completed as a result of intensive research.

In other words, if water-soluble vinylon yarn or fine count rubber yarn (naked latex fiber, for example, the thickness is about the same as #20 cotton yarn) is used for the weft, and a special hose loom is used to weave without applying much total tension. It squeezes the warp threads appropriately. In this case, if the hydrophilic threads of the mugi yarn are passed through the rubber threads in a plain weave with a thick count (for example, one or two double threads of #20), almost no rubber threads will come out on the surface, and the warp threads will be parallel to each other. The delicate surface is bound and becomes sufficient as a humidifying tube for water bathing. In addition,
The water-dropping pinylon yarn used for the weft in the present invention preferably has an average molecular weight of 2,400 or more, or one that has been subjected to drawing heat treatment.

In addition, the water-soluble vinylon yarn used for the weft in the present invention does not have slits that are dissolved by the dampening solution during use, and it sufficiently absorbs the dampening solution and provides the necessary elasticity and flexibility for a humidifying cylinder for lithographic printing. It is something. Furthermore, by modifying the loom, even if the fabric is made into a plain weave or double weave, the surface of the fabric will be smooth enough to be printed.

In order to sufficiently absorb the water necessary for printing, it is preferable to use cotton yarn as the warp yarn and to weave two #2 Daiden twin yarns in a double weave. In this way, the performance as a humidifying tube for water machines can be improved. The thickness of the fabric must be at least two or more layers from the viewpoint of water absorption, and from the viewpoint of surface smoothness, it is more preferable to use a double or triple weave.

Since the humidifying tube of the present invention is constructed in this way, unlike conventional knitted loose products, '1} The fabric is hard and elastic, so it firmly adheres to the roller, and it can be used for a long time during printing, and is durable. There is.

'2) It has good water absorption and has an ideal, delicate surface with no fluff, so fluff does not come off and a homogeneous water supply is achieved.

'3} The thickness of the dough can be changed freely.

For braiding (stockinette, etc.), you can only use threads that match the pot of the rope braiding machine, but with a loom, the thickness of the fabric can be changed, so it can be used for a variety of aquatic applications, from light office printing to metal sheet car printing. It is possible to freely obtain rice bran, and it is easy to provide water according to the amount of water supply. It has great effects as a humidifying tube for birch birch, and since it can be manufactured using a relatively inexpensive hose loom, it is extremely advantageous as it can be provided at a low price.

Claims (1)

[Claims] 1. A tubular weave humidifier for a water rod roller of an offset printing machine, characterized in that it is woven into a tubular shape on a hose loom using cotton thread or other hydrophilic fibers for the warp and water-soluble vinylon yarn or rubber thread for the weft. Tube.