JPH0371827A - Decorative sheet - Google Patents

Abstract

PURPOSE:To obtain a decorative sheet without spoiling beautiful appearance including a mat condition when flex such as folding is performed by adhering a powdery granule with a mean particle diameter of a specified value or smaller and a hardness larger than the hardness of a synthetic resin foamed layer on the surface of the synthetic resin foamed layer set on a base material. CONSTITUTION:A base material 2 is prepd. by laminating and forming a syn thetic resin layer 1 on a backing paper 10 for wall paper. A foaming polyvinyl chloride resin paste 3 is printed design-likely on the base material 2 by means of a rotary screen. While the design-likely printed foaming polyvinyl chloride resin paste 3 is not gelated, as a powdery granule, a transparent vinyl chloride resin bead with a hardness larger than the hardness of a synthetic resin foamed layer and a mean particle diameter of 100mum or smaller is scattered and excess bead which does not adhere on the ungelated foamable vinyl chloride resin paste is removed and the foamable vinyl chloride resin paste is heat-foamed to form a synthetic resin foaming layer 5. The obtd. decorative sheet has a tough surface hardness and no crack occurs on the sheet surface by folding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to continuous materials such as wallpaper, vehicle interior materials,
Furthermore, the present invention relates to a decorative sheet with excellent surface strength and a matte finish that can be used for shoes, bags, furniture upholstery, etc.

[Prior Art] This type of decorative sheet is produced by partially forming a synthetic resin foam layer on an appropriately lined sheet-like base material using thick printing means such as rotary screen printing, thereby creating an uneven design on the surface. There are some that have been given.

However, the surface of the convex portion in the synthetic resin foam layer is weak in strength even though it frequently comes into contact with objects, so it has been necessary to strengthen it.

For this reason, in order to further provide a non-foamed synthetic resin layer on the surface of the foamed convex portion, a matting agent was added as needed.
A surface treatment liquid made of a synthetic resin with film hardness is applied using a gravure roll, or a non-foamed synthetic resin layer is applied using a rotary screen, etc. by aligning the foamed convex portion with the handle. Ta.

[Problem to be solved by the invention]

However, although the former method mentioned above does not have the problem of pattern shift, it is still insufficient in terms of strength, and since it is applied using a gravure roll, etc., it tends to cause unevenness in the application, which promotes this problem. . Furthermore, when the decorative sheet is bent during use, cracks occur in the surface-treated portion, which is a problem.

This cracking phenomenon occurs not only in surface treatments to increase surface strength, but also in surface treatments to give the surface a matte finish.

This is because the elongation of the coating on the two-surface treated area cannot keep up with the elongation of the underlying synthetic resin foam layer, resulting in cracks.

The latter method has drawbacks such as the fact that the pattern is synchronized to form a non-foamed layer, and the pattern cannot be synchronized properly, resulting in misalignment of the pattern.

The present invention overcomes these conventional problems, does not require consideration for handle misalignment, has sufficient strength, and maintains an aesthetic appearance including a matte state even when bent such as by folding. The purpose is to provide a decorative sheet that will not be damaged.

[Means to solve the problem]

That is, the gist of the present invention is as follows: (1) The surface of the synthetic resin foam layer provided on the base material has an average particle size of 100 μm.
1. A decorative sheet, characterized in that a powder or granular material having a hardness of not more than m and at least a hardness greater than the hardness of the synthetic resin foam layer is attached.

(2) The decorative sheet according to item 1 above, wherein the synthetic resin foam layer is partially provided on the base material.

It is in.

Hereinafter, to explain the present invention in detail, the above-mentioned base material includes:
Used as a base material for this type of decorative sheet, for example, natural fibers, synthetic fibers, glass fibers, inorganic or organic fibers such as pulp, alone or in combination, and if necessary, calcium carbonate, clay, etc. Woven fabrics, nonwoven fabrics, knitted fabrics, paper, etc. mixed with inorganic fillers and various synthetic resin binders can be used.

In addition, such materials can be further coated with a foamed or non-foamed synthetic resin layer and laminated by means such as lamination, and can also be used as a base material.Furthermore, foamed or non-foamed synthetic resin layer sheets alone can be used. It may also be used as a base material.

These base materials are selected to have necessary physical properties such as flame retardancy depending on the intended use.

The synthetic resin constituting the synthetic resin foam layer may be any commonly used synthetic resin such as vinyl chloride resin, acrylic resin, polyethylene, polypropylene, ethylene-vinyl acetate copolymer resin, urethane resin, etc. good.

This synthetic resin foam layer is preferably formed in a pattern on the base material by a known printing means or the like.

The portion where the patterned synthetic resin foam layer is not formed has a concave shape, and the patterned synthetic resin foam layer portion has a convex shape.

In order to further emphasize this convex portion, printing means such as gravure printing, screen printing, especially rotary screen printing are preferable. According to this rotary screen printing, thick printing up to a thickness of about 2 mm is possible. In thick printing using a rotary screen, synthetic resin pastes such as vinyl chloride resin pastes are suitable.

When a vinyl chloride resin paste is used as the synthetic resin paste to form a synthetic resin foam layer, azodicarboxylic acid azide, dinitrosopentamethylenetetramine, oxybisbenzene is added as a foaming agent to the vinyl chloride resin paste. Foaming can be achieved by adding sulfonic acid or the like.

In addition to this blowing agent, the synthetic resin used in the present invention also contains commonly used plasticizers, fillers, antifungal agents, colorants,
Additives such as stabilizers can be added, and if necessary, foaming accelerators and foaming inhibitors such as those used in chemical embossing may also be added.

A synthetic resin paste containing such a foaming agent is printed on a base material and then foamed by a treatment such as heating to form a synthetic resin foam layer.

In the present invention, powder particles are attached to the surface of this synthetic resin foam layer. The attachment means is not particularly limited, but
The method of dispersing powder after printing the synthetic resin paste and before gelling the synthetic resin paste is preferable because it eliminates the need to separately prepare an adhesive.

In this case, if the powder or granules are beads made of heat-melting synthetic resin, part of the powder or granules will melt when the synthetic resin paste is heated and foamed, making it more firmly fixed to the surface of the synthetic resin foam layer. be able to.

The powder must have a certain degree of hardness in order to improve the surface strength of the decorative sheet.
In consideration of the relationship with the synthetic resin foam layer below, a material with a hardness higher than that of the synthetic resin foam layer is adopted. Examples of such powder and granules include those mainly made of synthetic resins such as vinyl chloride resins, acrylic resins, polystyrene resins, and polyolefin resins;
A'1 can be exemplified by particulate matter. These powder particles may be colorless and transparent, colored and transparent, or opaque.

Further, the shape of these powder particles may be bead-like, pellet-like, or irregularly shaped.

In the present invention, these powders and granules cannot be used without limit, and specific conditions are required.

The condition is the average particle size, which must be 100 μm or less, preferably 80 μm or less. If powder or granules with a particle size exceeding iooμm are used,
The presence of powder and granules tends to stand out, and this not only emphasizes it and greatly changes the image of the design, but also
The matte effect due to diffused reflection of light is lost.

〔Example〕

Examples of the present invention will be specifically described below, but the present invention is not limited thereto.

Example-1 (See Figures 1 and 2) On a backing paper for wallpaper (Tsubo N80 g/Bo) (10), a vinyl chloride resin paste of the following formulation-1 was applied using a rotary screen. Printed to a thickness of 0.1mm,
The synthetic resin IW (1) was heated to gel at 150'C for 60 seconds to form a laminate, which was used as a base material (2).

Blend - 1 unit (parts by weight) Vinyl chloride resin 100 Plasticizer (DOP
) 60B a/Z n-based stabilizer 3 filler
50 Colorant (Titanium Oxide) 2 On the obtained base material (2), a pattern was printed on the foamable vinyl chloride resin paste (3) having the composition shown below in the formulation-2 using a rotary screen.

Blend - 2 units (parts by weight) Vinyl chloride resin 100 Plasticizer (DOP
) 60B a / Z n-based stabilizer 3.5 Foaming agent (azodicarbonamide) 5 Coloring agent (fa titanium) 0.5 Next, the expandable vinyl chloride resin paste (3) printed in a pattern is in an ungelled state. During the process, transparent vinyl chloride resin beads obtained by bulk polymerization and having an average particle size of 50 μm or less are sprinkled as powder (4), and then the surplus that has not adhered to the ungelled foamable vinyl chloride resin paste is dispersed. After removing the beads, the foamable vinyl chloride resin paste was foamed by heating at 210'C for 50 seconds to form a synthetic resin foam layer (5). The obtained decorative sheet has a strong surface hardness and will not be scratched or destroyed even when scratched with a fingernail, and the attached beads will not be noticeable, and the gloss will disappear and it will remain moist. It gave me a sense of calm. I also bent this sheet, but the surface of the sheet cracked! There was no change in ffl.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably impart the desired surface strength and matte state to the surface of the appropriately provided synthetic resin foam layer without having to consider pattern misalignment, and moreover, the surface of the synthetic resin foam layer The strength is sufficient, and the powder and granules adhere independently even when bent or bent.
That is, since the stress concentration that occurs in a continuous film does not occur, there is an advantage that a decorative sheet can be provided that does not spoil the aesthetic appearance due to baboon cracking or the like.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of the manufacturing process of the decorative sheet of the present invention, and FIG. 2 is a cross-sectional view showing an example of the decorative sheet of the present invention. 2...Base material 4...Powder material 5...Synthetic resin foam layer

Claims (2)

[Claims] (1) Particles having an average particle size of 100 μm or less and having a hardness at least greater than the hardness of the synthetic resin foam layer are attached to the surface of the synthetic resin foam layer provided on the base material. Decorative sheet. (2) The decorative sheet according to claim 1, wherein the synthetic resin foam layer is partially provided on the base material.