JPH0134785B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated sheet in which the texture pattern of the base knitted or woven fabric is clearly defined. Conventionally, laminated sheets, so-called tarpaulins, made of knitted fabrics with a synthetic resin film layer on one or both sides have been widely used as materials for tents, flexible containers, bags, and other thin items such as jackets. Depending on the use, such a laminated sheet has a pattern printed on its surface or an uneven pattern formed by embossing. Conventionally, the embossing process described above has been used to create a texture pattern on the fabric; however, it is generally difficult to obtain a sufficiently satisfactory and noticeable texture pattern using embossing. For highly fashionable items such as bags, materials with various patterns and properties are desired, and laminated sheets are also required to have various characteristics.

As a result of various studies to provide a laminated sheet having a surface with a prominent texture pattern, the present inventor has discovered that a laminated sheet with a very prominent texture texture pattern, which could not be obtained by embossing, has been developed into a laminated sheet. It was successfully brought to the surface.

In other words, the present invention does not rely on external influences (pressure) on the laminated sheet of the base knitted fabric and the synthetic resin film layer, but rather on the influence from within the sheet, that is, the influence of the gap between the grains of the base knitted fabric. As a result, it was possible to produce very noticeable texture irregularities on the surface of the synthetic resin film layer, which could not have been produced by external pressure (embossing).

The present invention provides a laminated sheet in which the synthetic resin film layer is almost completely recessed into the gaps between the grains of the base knitted or woven fabric by the method described in the inventions (1) and (2). The purpose has been achieved.

First, in the method of the invention (1), a synthetic resin film layer is laminated on one or both sides of a base knitted or woven fabric, the synthetic resin film layer is softened, and while in this softened state, a laminated sheet is laminated as appropriate. By stretching the synthetic resin film layer in the width direction by a method, and then treating it in this stretched state at the setting temperature of the fibers constituting the base textile fabric, the synthetic resin film layer is applied to the gaps between the grains of the base textile fabric. This completes the side-by-side (concave) joint. Next, in the method of the second invention, after laminating a synthetic resin layer on one or both sides of the base knitted fabric,
The synthetic resin is softened, and while in this softened state, the laminated sheet is caused to shrink in the length direction while keeping its width constant without changing its width, and then, in this state, a base knitted fabric is formed. By processing at the fiber setting temperature, the joining of the synthetic resin film layer to the grain spacing of the base knitted fabric is completed. In other words, in the present invention, in a laminated sheet of a base knitted fabric and a synthetic resin film layer, the synthetic resin film layer is softened in advance to give it free deformability, and then the laminated sheet is pulled in the width direction (lateral direction). By stretching the fabric, the fabric gaps of the base knitted or woven fabric are forcibly deformed, and at the same time, the synthetic resin film layer is also deformed in accordance with the deformation of the fabric gaps, causing it to conform to the fabric gaps (causing it to collapse). ) is a thing. In this way, the present invention is capable of causing irregularities in the texture of the synthetic resin film layer to appear on the surface of the film layer by deformation of the synthetic resin film layer in accordance with the deformation of the material gap of the base knitted or woven fabric. The thickness must be such that it is affected by the deformation of the gap between the grains of the base knitted fabric. In other words, this thickness is permissible to a considerable extent depending on the degree of deformation of the weave gap of the base fabric, but if it is too thick, it may be The deformation of the synthetic resin film layer, that is, the depression into the gaps between the fabric grains, is small, and the effect does not reach the surface.
Therefore, the appearance of texture irregularities on the surface of the synthetic resin film layer becomes unclear or impossible. The thickness of this synthetic resin film layer must be determined by the number of yarns in the base knitted fabric used, the degree of deformation of the fabric gap due to the weaving structure, etc.
In relation to the base fabric used in general laminated sheets, so-called tarpaulins, having a thickness of about 0.3 mm to 0.6 mm, the thickness is preferably 0.25 mm to 0.05 mm. Here, the lower limit thickness was set to 0.05mm.
This is because if it is thinner than 0.05 mm, the synthetic resin film layer may be destroyed due to deformation.

Another important point in the present invention is to cause sufficient deformation in the base textile fabric. Sufficient deformation occurs by stretching in the width direction (horizontal direction) or shrinking in the length direction, but as in the method of the second invention, stretching in the width direction (horizontal direction) and shrinking in the length direction at the same time By forcing it, more sufficient deformation can be caused. That is, in the method of the second invention, a synthetic resin film layer is laminated on one or both sides of a base knitted fabric, the synthetic resin film layer is softened, and while in this softened state, the laminated sheet is stretched in the width direction. At the same time, the fibers constituting the base knitted fabric are contracted in the longitudinal direction, and then, in this state, they are treated at the setting temperature of the fibers constituting the base knitted or woven fabric, so that the synthetic resin film layer is applied to the gaps in the fabric of the base knitted or woven fabric ( (concavity) completes the welding. By this method, more significant depression of the synthetic resin film layer is realized. The degree of elongation (tensile rate) in the width direction (lateral direction) of the laminated sheet in the present invention is:
It can be set as appropriate depending on the relationship between the number of threads of the base fabric, weaving structure, etc. and the thickness of the synthetic resin film layer, but generally 2 to 3% is sufficient. In the present invention, the means for softening the synthetic resin film layer and stretching the laminated sheet in the width direction (lateral direction) is not particularly limited, and generally a tenter equipped with a drying heating chamber is used. In this method, first, the synthetic resin film layer is softened while the laminated sheet is moved while keeping its original width.
Next, set the tenter width to 1.02 to 1.08 of the original width of the laminated sheet.
The laminated sheet is stretched in the width direction (horizontal direction) by adjusting the stretching temperature twice, and then passed through the setting temperature of the constituent fibers of the base textile fabric in that state. The setting temperature and time in this case vary depending on the type of fiber constituting the base knitted fabric; for example, in the case of nylon fiber, it is 185° C. for 30 seconds. Further, the contraction in the length direction is carried out, for example, by overfeeding. The method of forming the synthetic resin film layer includes laminating a synthetic resin film, doctor knife coating of a paste-like synthetic resin, calendar topping, and the like. Examples of the synthetic resin forming the synthetic resin film layer include polyvinyl chloride and ethylene vinyl acetate copolymer. Ordinary synthetic resin film layers are formed by mixing these synthetic resins with plasticizers, pigments, fillers, additives, and the like.

According to the method of the present invention, in addition to making it possible to make a very noticeable uneven texture pattern appear on the fabric, surface treatment by printing or coating a pattern on the front, etc.
For example, it is naturally possible to apply the operation of the present invention after performing a pearlescent finish to make an uneven pattern appear, and if this method is carried out, an extremely clear pattern will be created across both the convex and concave areas. Can be granted.

The laminated sheet of the present invention exhibits an extremely desirable appearance when used, for example, as a table cloth, bag material, or wall covering sheet.

Next, the present invention will be explained in more detail with reference to Examples.

Example 1 Using 420D nylon fibers, a plain woven fabric (thickness 0.32 mm) with 31 threads x 53 threads was used as a base fabric, and one side of the base fabric was coated with polychloride by a calendar topping method. A 0.2 mm thick polyvinyl chloride film layer made mainly of vinyl is laminated, and then a floral pattern is printed on the surface, and then the next operation is performed on this laminated sheet using a tenter equipped with a drying chamber. provided.

First, the tenter width is set to the original width of the laminated sheet, and the laminated sheet is placed in a drying room whose temperature is controlled between 130℃ and 150℃, and it takes about 20 seconds to soften the polyvinyl chloride film layer. The width of the laminated sheet was set to 1.02 to 1.03 times the original width of the laminated sheet, and the laminated sheet was stretched in the width direction while being moved, and then the base fabric was passed through an atmosphere at a temperature of 185°C for about 30 seconds in this stretched state. was set.

The laminated sheet obtained as described above has a polyvinyl chloride film layer that is well aligned with (sinks into) the gaps between the grains of the base woven fabric, and has a very prominent texture (plain weave) uneven pattern with a clear floral pattern on its surface. It was a laminated sheet that appeared.

Example 2 A polyester fiber (250d) plain woven fabric (thickness 0.2 mm) with 30 threads x 30 yarns was used as the base fabric, and a thick layer mainly composed of ethylene vinyl acetate copolymer was used on both sides of the base fabric. A laminated sheet was obtained by laminating 0.2 mm thick ethylene vinyl acetate copolymer film layers, and the laminated sheet was subjected to the following operations using a tenter equipped with a drying chamber. First, the laminated sheet is set to the width of the tenter width and placed in a drying chamber whose temperature is controlled at 90 to 110°C, and it takes about 20 seconds to soften the ethylene vinyl acetate copolymer film layer. After that, change the tenter width to 1.05~ of the original width of the laminated sheet.
At the same time, the laminated sheet was set to 1.06 times and moved while applying overfeed to stretch the width direction of the laminated sheet and contract it in the length direction.Then, it was passed through an atmosphere at 205℃ for about 30 seconds in this stretched and contracted state. Then, the base fabric was set.

In the laminated sheet obtained as described above, the ethylene-vinyl acetate copolymer film layer on both sides is well aligned with the grain gaps of the base woven fabric (sinking), and the fabric grains are noticeable (plain weave).
It was a tarpaulin with an uneven pattern.

Claims (1)

[Scope of Claims] 1 A laminated sheet in which a synthetic resin film layer is laminated on one or both sides of a base knitted or woven fabric is 1.02 to 1.03 times the original width of the laminated sheet in a state where the synthetic resin film layer is softened. The laminated sheet is stretched by 2 to 3% in the width direction through a tenter whose width is adjusted to
A method for producing a laminated sheet in which texture irregularities of the base knitted fabric are exposed on the surface, characterized in that the process is carried out in this state at the setting temperature of the constituent fibers of the base knitted or woven fabric. 2. After laminating a synthetic resin film layer on one or both sides of the base knitted fabric, the synthetic resin film layer is softened, the laminated sheet is stretched in the width direction and simultaneously contracted in the length direction, and then this state is A method for producing a laminated sheet in which texture irregularities of a base knitted or woven fabric are exposed on the surface, characterized in that the fibers constituting the base knitted or woven fabric are treated at a set temperature.