JPS60179296A - Backlining cloth for simple bookbinding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a spine-pasting cloth coated with hot-melt adhesive used for simple bookbinding. Regarding.

Prior Art A large number of sheets are laminated, a front cover and a back cover are superimposed on both the upper and lower surfaces, and a spine-attached cyclos is pasted to one side of the sheet laminate to serve as a back cover. The technique of making a simple book by folding the remaining edges of the book and pasting it on the front and back covers is well known. and.

The backing cloth used in this case is generally a backing cloth made of paper or the like coated on one side with a hot melt adhesive.

In the case of such simple bookbinding, folding durability after binding.

In order to increase the strength against tearing, etc., it is necessary to increase the thickness by laminating the paper that is the base material of the backing cloth, or to use strong cardboard as the backing cloth. The flexibility of the backing cloth will be lost. This causes the following problems when actually used.

That is, when such a back cloth is attached to one side of a sheet laminate, as shown in Figure 1, the strength of the paper, which is the base material, becomes troublesome and the adhesive layer is damaged. The adhesion strength between the back sticker Cyclos α that holds C as a valve and the text paper d is weak p.

The spine of the spine sticker α peels off from the text paper d, leaving the spine of the book rounded, which also deteriorates the appearance of the book after binding.

In addition, since the base material of the spine cloth α is stiff, the spine cloth a tends to return to its original flat sheet state, and for this reason, one edge of the spine cloth α attached to the front cover C There is also a disadvantage that the side seal f easily peels off, and that the bound product opens wide as shown in FIG. Furthermore, even if the adhesive force of the adhesive Jvic is strengthened and the back of the back cyclos α is bonded to the main text paper d, the bending resistance of the edge of the back cyclos α is strong due to the stiffness of the base material. For.

As shown in FIG. 3, the corners of the spine of the bound product (the bent portions of the spine cyclos 1) are rounded, resulting in poor finish of the corners.

Generally, the back cloth for bookbinding is embossed in various ways to give it a variety of appearances, but it depends on the material used.

As mentioned above, the drawback was that it did not fit the text paper.

Purpose of the Invention Accordingly, an object of the present invention is that when using a spine cloth for simple bookbinding, it is possible to apply a spine that fits the body paper, regardless of the thickness or stiffness of the spine cloth, and to improve finishing performance and To provide a back-pasting cloth which has excellent spacing between rows and has sufficient tear strength and stiffness except for joints of the back part and parts bent in any horizontal direction. Another object of the present invention is to have the above-mentioned 4 & tJf, and to apply the minimum amount of pressure to the spine so that the spine can be easily adhered to the text paper and the thorny outer cover by making full use of the viscous force of the adhesive itself. Pasted cloth is all we can offer.

Structure of the Invention The back cloth 1 for simple bookbinding according to the present invention has a back surface of a back cloth used for simple bookbinding by applying hot melt adhesive on one side of a base material in a direction corresponding to the direction along the spine. ((The formation of multiple vertical striped embossed patterns f
:% mark, and the above-mentioned characteristics can be achieved simply by applying such embossing.

Operation/Effects and Modes of the Invention As described above, the back patch cloth according to the present invention
By forming multiple vertical striped embossed patterns on the back side of the cloth (the non-adhesive side of the base material) in a direction corresponding to the direction along one spine (usually the long direction of the back pasted cloth). , increasing flexibility in the lateral direction (direction that crosses the above directions).

The bendability of the edges of the spine pasting cloth has been completely improved, and even when using a thick base material with strong tear strength and folding strength, the spine can be pasted to fit the main body of the paper, and finishing is one of the main functions. and to improve external enemies. In order to make this effect noticeable, it is preferable for the embossing to form a very thin and dense pattern parallel to the back, but there should be at least one embossed line on the folded part of the back pasting cloth. need to be formed. For this purpose, it is necessary to form at least three or more in a width corresponding to the thickness of the body paper, although this varies depending on the thickness of the book. Also, the length of the embossed line on the book is 1 to 1/1 of the total length of the back of the book! The length should be as short as 4 to 4 degrees, more preferably about 4 to 4 times the total length of the back.

This is to ensure that even if the spine cyclos is attached to the text paper not parallel to the longitudinal direction of the back but somewhat twisted during adhesion, it can be sufficiently fitted to the back of the text paper.

Generally considered embossed shapes are 15cr in length.
n or less, depth 0, Ofms or more and 1.0 morning or less, and density 5 lines/cm or more. Table 1 below shows preferred lengths of the embossed lines in relation to the size of the book.

Table 1 Further, Table 2 below shows the preferred range of the embossing depth in relation to the thickness of the cardboard serving as the base material.

@Table 2 It should be noted that if the embossing depth is too shallow, the effect described in J will not be achieved, and if the embossing depth is too deep, the base material will easily break, which is not preferable.

The embossed pattern can be in the shape of each group, and several examples of the embossed pattern are shown in Figures 4 to FC+.

Further, by forming embossing as described above, a great effect is brought about when storing and transporting the backing cloth coated with hot melt adhesive. That is, in order to store all the backing cloths, it is usual to form them into rolls or strips in advance and stack them for storage, and the back side of the backing cloth comes into direct contact with the adhesive agent. Therefore,
When the environmental temperature becomes high during storage or transportation, the surface of the adhesive becomes semi-molten, and in the case of conventional backing cloths, a so-called blocking phenomenon occurs in which the adhesive sticks to the back surface of the backing cloth. For this reason, even if the backing cloth that has been blocked is peeled off and used, a thin paper layer will remain on the surface of the adhesive, resulting in a decrease in adhesive strength. However, in the case of the backing cloth of the present invention,
Since the back surface is embossed and has an uneven shape, there is a gap between the adhesive surface and the back surface of the backing cloth, which alleviates the blocking phenomenon. In addition, even if a blocking phenomenon were to occur, the paper waste remaining on the adhesive surface would only be exerted by the protrusion on the back of the backing cloth, which is extremely thin and short, so the adhesive force due to the remaining paper layer would be reduced. This has the effect of keeping the decline to a minimum.

As the base material for the backing cloth according to the present invention, various materials such as paper, nonwoven fabric, aluminum foil, resin film such as polyester or polycarbonate, or resin-impregnated coated paper can be used. Also, the hot melt adhesive applied to this is one whose adhesive properties are activated by heating.

For example, polyethylene copolymerization systems represented by ethylene-vinyl acetate copolymers, polyamide systems, polyester systems,
Polybutyral and the like are generally preferably used. Another resin layer may be interposed between these base materials and the hot melt adhesive layer. Further, as the hot melt adhesive, one having a relatively low melt viscosity is used, and as the resin scrap, a material having a melt viscosity lower than that of the hot melt adhesive, such as polyethylene or polypropylene.

Using non-polar resins such as cellophane, polyester, polyamide, polyvinyl chloride, ethylene-vinyl acetate copolymer, vinylidene chloride copolymer, etc., especially polyethylene and polypropylene, 7
The above-mentioned hot melt adhesive with a low melt viscosity is applied at a thickness of 1] corresponding to the thickness of the one-piece laminate, and the adhesion between the resin layer - hot melt adhesive layer and the hot melt adhesive layer - text paper is adjusted. Utilizing this difference, the base paper of the backing cloth can be easily peeled off from the bound product after it has been made into a 1nj easy book. If you do it like this.

After the base paper is peeled off, only the hot-melt adhesive will remain on the back side of the main text paper, and since the melt viscosity of this adhesive is relatively low, it has not penetrated into the inside of the main text paper, and therefore bookbinding is difficult. It has the advantage of being able to easily tear out the required number of sheets by hand. As the resin layer, the above-mentioned resins can be used alone or in a mixture of two or more, and depending on the case, silica, titanium, alumina, calcium carbonate, or silicone may be used.

By adding fluorine compound fine powder or the like, the releasability of the base material from the product can be made more preferable.

Example: On one side of acrylic resin-impregnated paper with a thickness of 0.15 kg/d and a shoulder layer of 0.15 mm, the length is approximately 10 mm, the width is approximately 0 mm, the IU depth is approximately 0.05 to 0.1 mm, and the density is approximately Embossing was performed so that the number of lines was 20/cm. For comparison, paper having the same structure except that it was not embossed was prepared. A comparison of the physical property data of each of these papers is shown in Table 3 below.

Table 3 As is clear from the data above, embossing according to the present invention greatly increases the lateral flexibility.

Next, as shown in FIG.
Apply ethylene-vinyl acetate copolymer hot melt adhesive to the back side (embossed Uzuki surface) of the paper base material 2 with a width corresponding to the thickness of the sheet laminate (text paper 4 + front cover 5 + odor side cover 8). When the spine cloth 1 coated with agent 3 was attached to one end of the sheet laminate and bound,
A spine paste that satisfactorily fit the text paper was produced, and both the finishing performance and the finished appearance were excellent, without any rounding of the spine or corner, and the finishing of the corner 7 was excellent. Also, the side seal 6 did not come off.

There was no opening at all like the real thing made in Inn darkness.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing the state of the bound book when it is bound with the conventional spine-pasting cloth, and Figure 3 is a section showing another state of the bound book when it is bound with the conventional spine-pasting cloth. Side view, Figures 4 to 4 (C1 is f of the embossed pattern according to the present invention)
FIG. 5 is a side view showing the state of a bound book bound with the backing cloth according to the present invention. 1 is the backing cloth, 2 is the base material, 3 is the hot melt adhesive, 4 is the text paper, and 5 is the front IH cover. Applicant Fuji Xerox Co., Ltd. Applicant Dynic Co., Ltd. Agent Patent attorney Masaaki Yonehara Patent attorney Tadashi Hamamoto Figure 1 Figure 2 Figure 3 C15 4 Figure (A) +81 (C1 Figure 5

Claims (1)

[Claims] A hot-melt adhesive is applied to one side of a base material on the back side of a backing cloth used for simple bookbinding. A spine sticker for simple bookbinding characterized by a plurality of vertically striped embossed patterns formed entirely in a direction corresponding to the direction along the spine of the book.