JPH0450078Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention Industrial Application Field The present invention relates to a jigsaw puzzle made of nonwoven fabric.

Conventional technology Traditionally, jigsaw puzzles have been made by using a thick paper such as cardboard as a base, pasting a paper material k with a pattern printed on it as shown in Figure 3, and then using a punching blade to create a number of predetermined pieces It is made by cutting into shaped sections.

Problems to be Solved by the Invention This conventional jigsaw puzzle has the following four major drawbacks.

The first is that since it is a paper material k with a printed surface, it has a gloss, but this gloss makes the pattern difficult to see depending on the viewing angle.

In other words, in the case of paper, a protective film is formed by spraying PVA etc. on the surface, but although this protective film improves the gloss, the surface shines due to reflection, and depending on the viewing angle, some parts of the pattern or Everything becomes invisible.

The second point is that there are round-shaped depressions between the punched sections (see Figure 3), and the seams are sharp and noticeable, which becomes a major drawback when the pattern is assembled. There is.

In other words, since the base material is cardboard, a large amount of force is required to cut it due to the denseness of this paper, and the distortion of the force applied during cutting is not well absorbed, so the cut surface is susceptible to deformation, especially at the corners. It is easy to cut out, so it is usually punched out using a special cutting tool such as a chamfer cutter.

As a result, as shown in Figure 3, the periphery of the section is not at right angles, but a radius r is formed, and these radiuses form a valley-like depression v at the seam, making it easy for gaps to occur. -ing

The third drawback is that when the puzzle is assembled, it will easily collapse if there is no supporting member G such as a mount as shown in FIG.

In other words, as mentioned above, there is a valley-shaped depression v at the joint between the sections, and the sections themselves are easily deformed by pressure during assembly, so they are likely to collapse and fall apart under a small amount of stress after assembly. A mount or the like is required to support the whole and retain its shape.

The fourth drawback is that since it is made of cardboard as a base, it is relatively heavy, which puts a considerable burden on manufacturing and transporting it, and this heavy weight also makes it more likely to collapse after assembly.

The present invention was made with the aim of improving the conventional jigsaw puzzles, which have many and serious drawbacks as mentioned above. Moreover, the object is to provide an extremely effective jigsaw puzzle in which the pattern is not damaged, and it is less likely to collapse after assembly, so there is no need for a supporting member such as a support mount.

B. Structure of the invention The structure of the invention is composed of a nonwoven fabric having a composition of 45 to 75% by weight of fiber material and 55 to 25% by weight of binder, and whose apparent density is 0.05 to 0.25 g/ ^cm3 . The gist is a jigsaw puzzle that is characterized by:

Measures to Solve the Problems As a result of conducting studies to create a jigsaw puzzle that uses nonwoven fabric as a component in place of the conventional jigsaw puzzle that uses cardboard as a base, we found that a nonwoven fabric that has a predetermined composition and apparent density can be used as a jigsaw puzzle. It has been discovered that this is a revolutionary jigsaw puzzle that is extremely suitable and can eliminate all of the drawbacks of the conventional methods mentioned above.

FIG. 1 is a partial plan view of the jigsaw puzzle of the present invention, with illustrations omitted.

FIG. 2 is an enlarged partial cross-sectional view of the jigsaw puzzle of the present invention.

As shown in these figures, this invention is a jigsaw puzzle P
Each section s is made of a non-woven fabric, and the blending composition of this non-woven fabric is 45 to 45% of the fiber material.
75% by weight and 55 to 25% by weight of binder, and the apparent density of this nonwoven fabric is 0.05 to 0.25.
It is in the range of g/ ^cm3 .

In this nonwoven fabric, if the fibrous material is less than 45% by weight and the binder is more than 55% by weight, the cushioning properties are lost and it becomes difficult to cut. If the number of fibers is less than 1, the degree of freedom of the fibers within the nonwoven fabric increases, so that they are easily deformed by external forces received during punching, and the pattern may become misaligned.

In addition, if the apparent density of this nonwoven fabric is less than 0.05 g/cm ³ , when the sections s are combined and made into a single sheet, the tension will be insufficient and it will not be suitable; If the value exceeds ³ , the cushioning properties to absorb the strain applied during punching and cutting or assembling the puzzle will be insufficient, and the section s will easily become deformed.

A particularly preferable range of this apparent density is 0.1 to 0.2
g/ ^cm3 .

The thickness of this nonwoven fabric does not need to be particularly limited, but it is preferably about 0.8 to 5.0 mm, and preferably about 1.0 mm.
A piece with a thickness of ~3.0 mm will ensure that when the puzzle is assembled into a sheet, the sheet will not feel floppy and will have appropriate tension.

Moreover, if the thickness exceeds 5 mm, the material cost will be high, the bulk will be large, and the handleability will be poor, which is not preferable.

The nonwoven fabric used in the present invention preferably has a structure of two or more layers while satisfying the above-mentioned conditions of composition and apparent density, and the surface layer has a structure with excellent printability, and other It is desirable that the lower layer has a structure that has excellent cushioning properties to absorb strain.

In other words, in the present invention, a pattern is applied by printing directly onto the surface of this nonwoven fabric, instead of pasting a paper material k with a pattern printed on it as in the past.

Therefore, the surface layer is required to have a structure that provides a smooth surface suitable for printing.

The type of fiber material used for this nonwoven fabric does not need to be particularly limited; it is better to have a relatively low single fiber strength in order to improve cuttability, and the fibers used for the surface layer should be relatively low in order to improve printability. Fine fibers are preferred.

Further, as for the binder used for this nonwoven fabric and the method for manufacturing the nonwoven fabric, conventionally known ones may be used, and there are no particular restrictions.

Function The structure of the present invention is as described above, and since the constituent material is nonwoven fabric with a lower density than paper,
It is easy to cut sharply and does not require special punching tools, and the cut surface is perpendicular to the surface as shown in Figure 2, eliminating the conventional rounded part r as shown in Figure 3. .

Therefore, there is a valley-like depression v between the sections s and s.
There is no formation of seams, the seams are not noticeable, and the contact area between the sections s is also increased.

In addition, in the contact between the sections s, these cut surfaces are fluffed with fibers of the nonwoven fabric, and the entanglement of these protruding fibers assists the bonding. The fact that it is light and the fact that it is light work synergistically,
After the puzzle is assembled, the entire sheet is extremely unlikely to collapse, and a mount or the like as the supporting member G is completely unnecessary.

Furthermore, since the pattern is printed directly on the surface of the nonwoven fabric, the surface does not shine and can be clearly observed from any angle.

Example A web consisting of 50% polyester fibers with a length of 1.5 denier 38 mm and 50% rayon fibers with a length of 3 denier 51 mm was used as the fiber material for the surface layer, and the fiber material of the middle layer and back layer was 1.5 denier 38 mm.
Using a web made of 30% long polyester fibers and 70% 3 denier 51mm long rayon fibers,
60 parts by weight of these three layers of fiber material is impregnated with 40 parts by weight of polyacrylic acid ester resin emulsion in terms of solid content, and dried to reduce the overall apparent density.
A nonwoven fabric with a weight of 0.15 g/cm ³ and a thickness of 1.8 mm (surface layer = 0.6 mm, intermediate layer + back layer = 1.2 mm) was obtained.

A pattern was applied to this nonwoven fabric using a gravure printing method, and the fabric was cut into a large number of sections as shown in FIG. 1 using an ordinary cutter blade to create a jigsaw puzzle.

This cutting process had good punching properties and was easy to cut.

The jigsaw puzzle thus obtained was easy to see because the pattern did not shine due to reflection, the seams between the pieces were almost invisible, and it did not easily collapse after assembly, did not require supporting members, and was lightweight.

C. Effects of the invention The effects of the invention are as detailed in the effect section, but can be briefly summarized as follows.

(a) The surface does not shine, so the pattern looks good from any angle.

(b) It has good punching properties during the manufacturing process and can be cut sharply without crushing, and no rounded portions are formed around the section.

(c) Therefore, the seams between sections are less noticeable and do not spoil the image.

(d) After the puzzle is assembled, the puzzle is extremely difficult to collapse due to the large contact area between the sections, the entanglement of the protruding fibers, and its light weight.

(e) Therefore, there is no need for a mount or the like as a supporting member, and the light weight reduces the burden, making it advantageous in terms of cost.

(f) Since the pattern is applied directly to the non-woven fabric, the unique taste of non-woven fabric comes out and the pattern has depth.

As described above, the present invention has various excellent effects and can be said to be an epoch-making jigsaw puzzle that eliminates all the drawbacks of conventional products.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view of the jigsaw puzzle of the present invention, with illustrations omitted. FIG. 2 is an enlarged partial cross-sectional view of the jigsaw puzzle of the present invention. P...jigsaw puzzle, s...section, FIG. 3 is an enlarged partial cross-sectional view of a conventional jigsaw puzzle.
r...Round portion, v...Valley-shaped depression, G...Supporting member, k...Paper material with a pattern printed on it.

Claims (1)

[Scope of utility model registration request] It has a blending composition of 45 to 75% by weight of fiber material and 55 to 25% by weight of binder, and its apparent density is 0.05 to 0.05.
A jigsaw puzzle characterized in that it is made of a nonwoven fabric with a weight of 0.25 g/cm ³ .