JPH0611531B2 - Tono Cover - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tonneau cover used as a cover for a luggage compartment of an automobile.

[Prior Art and Its Problems] Tonneau covers are used as covers for luggage compartments of wagons, vans and hatchback type automobiles, and the opening and closing of the tonneau covers is performed by a winding device for the tonneau cover (Japanese Patent Laid-Open No. 59-59). -92228).

As a material for such a tonneau cover, a sheet made of vinyl chloride resin has been conventionally used for facilitating its winding.

In recent years, cloth-like materials having soft warmth have been used as interior materials for automobiles in place of conventional leather-like vinyl chloride resin sheets in order to impart a high-class feeling. Nonwoven fabrics, knitted fabrics, etc. are used as such cloth-like materials, but when these materials are used directly as tonneau covers, slippage at the time of winding by a winding device is poor, and these materials are generally breathable. When you receive direct sunlight from the rear window,
There is a drawback in that the heated air has an adverse effect on what is put in the luggage compartment due to heat.

In order to solve such a drawback, it has been proposed to attach a film to the back surface of the cloth-like material, but in general, this has a hard texture, is easily horny, and increases the thickness, so the winding diameter However, it has not been put to practical use at present because of the large size, complicated processing, and high cost.

[Problems to be Solved by the Invention] Therefore, in view of the problems of the conventional techniques as described above, the present inventor has conducted diligent research to solve these problems, and as a result, has a cloth-like appearance. However, they have found a completely new tonneau cover that has a soft texture, is free from horns, is smooth, has good slippage during winding, has excellent surface durability, and has no breathability, and has completed the present invention.

[Means for Solving Problems] That is, according to the present invention, an impregnating layer of a synthetic resin emulsion containing a micro hollow body is provided on one surface of a fibrous base material, and the impregnating layer is densified. Regarding the characteristic tonneau cover.

[Operation and Example] Examples of the fibrous base material used in the present invention include non-woven fabrics, knitted fabrics,
A flexible material is used for the fibers themselves, such as felt and fiber web. The thickness of these materials cannot be unequivocally determined because it depends on the strength and thickness of the target tonneau cover and the type of the material, but usually 0.3 to 4.0 mm, especially 0.7 to 3.0 mm. used.

The minute hollow body contained in the synthetic resin emulsion used in the present invention refers to a hollow body in which the outer wall is made of a thermoplastic resin and the inside is made of a heat-expandable substance. In the present invention, the average particle diameter of the composition is 5 to 5. The 50 μm microspheres are used by subjecting them to a heat treatment during the manufacturing process of the tonneau cover to expand the thermally expandable substance inside. The proportion of such hollow microparticles is 5 to 50% by weight based on the total solid content of the emulsion.
Especially, it is preferably 10 to 30%. When the blending ratio is less than 5% by weight, air permeability is present, and
If it exceeds 50% by weight, the durability of the skin material decreases. As a specific example of the micro hollow body, a microsphere F-30 (manufactured by Matsumoto Yushi-Seiyaku Co., Ltd., whose surface is a vinylidene chloride copolymer and whose inside is a low boiling point hydrocarbon such as isobutane; Sphere particle size: 10 to 20 μm) and the like.

Examples of the synthetic resin emulsion include vinylidene chloride-based, ethylene-vinyl acetate-based, ethylene-vinyl chloride-based, acrylic-styrene-based, acrylic-vinyl chloride-based, polyester-based synthetic resin emulsions, etc. If necessary, a thickener, a flame retardant, a dispersant, a pH adjuster, a wetting agent, etc. may be added to the synthetic resin emulsion in an amount of 5 to 5% based on the total solid content of the synthetic resin emulsion.
It may be added in the range of 35% by weight, especially 10 to 30% by weight.

Thickeners that can be added to the synthetic resin emulsion used in the present invention include cellulose-based, alginic acid-based, or polyacrylic acid-based compounds, and flame retardants include phosphoric acid-based, oxalic-based, chlorine-based compounds, and trioxide. Dispersants such as antimony and ammonium hydroxide are pigments and aluminum hydroxide, inorganic compounds such as kaolin, pH adjusting agents are ammonia, water, acetic acid, oxalic acid, etc., and wetting agents are nonionic or Anionic surfactants, ethylene glycol and the like can be mentioned, but these components may be used alone, and as long as they can be added to the total solid content in the synthetic resin emulsion, various components can be used. You may mix and use.

The ratio of the weight of the fibrous base material (hereinafter referred to as F) to the total solid content of the synthetic resin emulsion (hereinafter referred to as B) (hereinafter referred to as F / B) is 60/40 to 95/5. ,Preferably
The synthetic resin emulsion is attached to the fibrous base material by adjusting it to 70/30 to 90/10. Such F / B is 60/40
If it is smaller than the above, the texture of the obtained tonneau cover is hard and the moldability is inferior, and if it is more than 95/5, the durability is lowered and the air permeability is generated.

After providing an impregnating layer of a synthetic resin emulsion containing micro hollow bodies on one side of a fibrous base material, the impregnating layer is densified. Usually, a calender or the like is used to perform densification. The impregnated surface of the emulsion is pressed or heated and pressed. The densification is performed to such an extent that the tonneau cover usually obtained does not exhibit air permeability.

The thickness of the impregnated layer densified as described above is about 10 to 50% of the total thickness of the tonneau cover obtained, especially 25 to
It is preferably about 50%.

Although the tonneau cover is thus formed, a resin print may be applied to the surface of the tonneau cover opposite to the synthetic resin emulsion impregnated layer in order to enhance abrasion resistance and impart a decorative effect. Examples of the resin print include acrylic resin and polyester resin, which are used by adjusting the adhesion amount to 5 to 15 g / m ² .

Further, the obtained tonneau cover has a large diameter when wound when the thickness exceeds 3.0 mm, and the strength decreases when it is less than 1.0, so the thickness is preferably 1.0 to 3.0 mm. On the other hand, if the unit weight is less than 100 g / m ^2, it is difficult to obtain durable ones, and if it exceeds 300 g / m ² , it becomes heavy and economically disadvantageous. Therefore, it is 150 to 300 g / m ^2. preferable.

Next, the tonneau cover of the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Example 1 Polyester fiber (fineness: 3 denier, fiber length: 64 mm)
After forming a web consisting of, a punched felt non-woven fabric (weight per unit: 144 g / m ² , thickness:
2.0 mm).

The obtained non-woven fabric contains isobutane and the outer shell is made of vinylidene chloride copolymer Microsphere Microsphere F
-30 (manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.) was used to impregnate one side of the non-woven fabric with a foam-impregnation method using an acrylic-vinyl chloride resin emulsion containing 15% by weight of solid content.

After that, it was dried with a dryer at 150 ° C., and at the same time, the microspheres were foamed to form microhollow bodies, and then calendered.

The obtained tonneau cover has a basis weight of 180 g / m ² and F / B of 80/20.
The thickness of the impregnated layer was about 1/3 of the total thickness of 1.5 mm.

The surface of this tonneau cover waits for a cloth-like appearance and feel, and the backside is smooth and soft and flexible as a whole, so that the tonneau cover can be wound smoothly when wound using a winding device. There was no horn on the surface. Further, when the air permeability of this tonneau cover was measured, it was 0 cc / cm ² / sec and showed that there was no air permeability at all.

The air permeability was measured according to the following method.

(Measurement of air permeability) JIS L-1079 5.20 is applied mutatis mutandis, using a flanger type tester, a test piece is attached to one end of the cylinder, and then an inclining barometer shows a pressure of 1.27 cm of water column by a potentiometer. The air pressure passing through the test piece according to the table attached to the tester (cc / cm ² / sec) according to the pressure indicated by the vertical barometer at that time and the type of air hole used. ). The measurement is performed 5 times, and the average value is taken as the air permeability.

[Advantages of the Invention] The tonneau cover of the present invention has a dense synthetic resin emulsion impregnated with a hollow micro body, and since it does not exhibit breathability, it is used as a tonneau cover for automobiles and is exposed to direct sunlight from the rear window. Even when receiving the heat, the temperature inside the luggage compartment does not rise abnormally, and since the back surface is smooth, it can be taken up and pulled out smoothly.

Moreover, since the impregnated layer is provided only on one side of the tonneau cover, the surface layer has a cloth-like appearance and feel, and also has a soft touch as the entire tonneau cover, and the effect of being rich in drapeability. Play.

Claims (2)

[Claims] 1. A tonneau cover comprising a fibrous base material on one surface of which an impregnating layer of a synthetic resin emulsion containing micro hollow bodies is provided, and the impregnating layer is densified. 2. The thickness of the impregnated layer is 10 to 10 times that of the fibrous base material.
The tonneau cover according to claim 1, which is 50%.