KR20030052250A - Note pad - Google Patents

Abstract

PURPOSE: A note pad having a plurality of self-adhesive, transparent note sheets is provided, which is excellent in view of writing adaptability, pigment-fixing property and ink-absorbing capability. CONSTITUTION: The note pad comprises a plurality of note sheets(1) each having a plastic film(11) having an adhesive layer(111) applied on a bottom surface of the note sheet(1) and a transparent coating layer(112) applied on a top surface of the note sheet(1) and providing a writing surface, wherein the coating layer(112) is prepared from a mixture containing at least one binder and at least one pigment mixed in a weight ratio of 1:1, and the plurality of note sheets(1) have opaqueness of not greater than 55%.

Description

Note pad {NOTE PAD}

The present invention relates to a knotted pad, more specifically a knotted pad having a plurality of self-adhesive transparent knot sheets.

Knot pads are products comprising a plurality of laminated self-adhesive knot sheets and are becoming popular recently because they can be attached onto the surface of a table, wall, book or document if desired for useful purposes. Typically, self-adhesive knot sheets are made of paper and are opaque, thus limiting their use.

It is therefore an object of the present invention to provide a knotted pad comprising a plurality of self-adhesive transparent knot sheets which can solve the above mentioned disadvantages.

1 shows a side view of a self-adhesive knot sheet of a preferred embodiment of the present invention.

FIG. 2 shows the plurality of self-adhesive knot sheets of FIG. 1 arranged in a stacked structure.

In accordance with the present invention, the knot pad comprises a plurality of self-adhesive transparent knot sheets stacked on each other. Each note sheet comprises a transparent plastic film coated with a transparent coating layer and a pressure sensitive adhesive layer. The coating layer is made of a mixture of one binder and one or more pigments. The weight ratio of binder to pigment is 1: 1 to 1:10. Each note sheet has an opacity of less than 55%.

1 and 2 show side views of a note pad embodying the present invention. The knot pad comprises a plurality of laminated knot sheets 1, each of which is composed of a pressure-sensitive adhesive layer 111 on the bottom surface of the knot sheet 1 and a transparent coating layer 112 on the top surface of the knot sheet 1. Coated plastic film 11. Coating layer 112 provides a writing surface.

The plastic film 11 is made of a material selected from the group consisting of polypropylene, polyethylene, polyvinyl chloride, polyethylene terephthalate and mylar. The pressure sensitive adhesive layer 111 may be an acrylate-type adhesive.

The coating layer 112 of the knot sheet 1 comprises a mixture of one binder and one or more pigments. The binder of the coating layer 112 is preferably selected from the group consisting of polyvinyl alcohol, polyacrylate, polyvinyl acrylate and styrene butadiene rubber. The pigment of the coating layer 112 is preferably selected from the group consisting of titanium dioxide, calcium carbonate, clay and mixtures thereof. The weight ratio of binder to pigment is preferably in the range of 1: 1 to 1:10 in order for the coating layer 112 of the knot sheet 1 to possess a transparent characteristic with good writing aptitude. Note that the opacity of the knot sheet 1 depends on the weight ratio of binder to pigment and the thickness of the coating layer 112 on the plastic film 11.

By virtue of the transparent feature, the knot sheet 1 is used in a document reproduction process, which is used in a document reproduction process including reproducing an assembly of a printed paper sheet and a knot sheet 1 attached to the printed paper sheet via a copier or a fax machine. It is possible to produce a copy sheet having a corresponding image or character reproduced from the image or character on the area of the printed paper sheet covered by the sheet of paper 1 while. Moreover, the image or text on the area of the printed paper sheet covered by the notched sheet 1 can be viewed directly without being removed or peeled off from the notched sheet 1. In order that the image or text reproduced on the above-mentioned copy sheet can be clearly observed, the notch sheet 1 preferably has an opacity of less than 55%, more preferably less than 40% and most preferably less than 30%. Have

The coating layer 112 of the knot sheet 1 may further comprise a dye for coloring the knot sheet 1. The dye may be added in an amount of at least 2% by weight based on the total weight of the pigment.

The knock sheet 1 of the present invention may further include a release paper (not shown) for covering and protecting the coating layer 112 of the plastic film 11.

The following examples show the change in the noteability of the note sheet 1 by the weight ratio of binder to pigment in different combinations of binder and pigment.

Examples 1 to 48

The note sheet's writing aptitude is classified into three grades of excellence (e), good (g) and fairness (f), and based on handwriting, adhesion (pigmentation of the pigment to the film) and ink absorption. Is determined.

Polypropylene was used as the plastic film in each of these examples for producing the sheet of notes. In these examples the coating layer was made of different combinations of binders and pigments with different weight ratios of binder to pigment. The binders used in these examples were polyvinyl alcohol (PVA), polyvinyl acrylate (PA) and styrene butadiene rubber (SBR). Pigments used in these examples were titanium dioxide (TiO ₂ ), calcium carbonate (CaCO ₃ ) and clay. The weight ratio of binder to pigments arranged in these examples is 1:10 to 1: 1, which is expressed in Tables 1-3 in grams of binder per 100 g of pigment.

Examples 1-19 are listed in Table 1, Examples 20-34 are listed in Table 2, and Examples 35-48 are listed in Table 3.

The results of these examples are shown in Table 4. Summarizing the results presented in Table 4, Examples 1-2 containing TiO ₂ , Examples 12-14, 33-34 and 42-43 containing clay, and Examples 19 and 45-containing CaCO ₃ 47 shows good and / or excellent handwriting, adhesion and ink absorption.

The following examples show the change in opacity of the notch sheet 1 with the coating weight of the coating layer 112 in different combinations of pigments and binders.

Examples 49-100

Polypropylene was used as the plastic film in each of these examples for making the sheet of notes. In these examples the coating layer was made with different combinations of binders and pigments with different weight ratios of binder to pigment and weight of the coating material (grams per square meter). The binders used in these examples were polyvinyl alcohol, polyvinyl acrylate and styrene butadiene rubber. Pigments used in these examples were titanium dioxide, calcium carbonate and clay. The opacity of these examples is listed in Tables 5-7.

A printed paper sheet and an assembly of a knot sheet made in each of these examples and attached to the printed paper sheet through a copier, and then on an area of the printed paper sheet covered by the knot sheet 1 during the reproduction process. By observing the quality of the corresponding image or character on the replicated sheet reproduced from the image or character, a test was carried out to investigate the effect of the opacity of the knock sheet on the quality of the reproduced replicate sheet.

The quality of the copy sheet is determined based on the clearness of the reproduced image or text on the copy sheet, which is indicated by excellence (e), good (g), good (f) and poor (p). It is classified into four grades. These test results are shown in Table 8.

Summarizing the results presented in Table 8, the knot sheets used in the knot pads of the present invention preferably have an opacity of less than 55%, more preferably less than 40% and most preferably less than 30%.

When the knot sheet used in the test was replaced with a post-it (trademark of 3M Corporation, a US company) having a yellow color and having an opacity of about 90%, The quality of the radiation sheet is very poor based on the grade.

It is clear that various modifications and changes can be made by the present invention as described above without departing from the spirit of the present invention. Therefore, it is intended that this invention be limited only by what is recited in the appended claims.

According to the present invention, a knotted pad comprising a knot sheet excellent in handwriting, adhesion and print absorbency is provided.

Claims (6)

A plurality of self-adhesive transparent note sheets stacked on each other, wherein Each said sheet comprising a transparent plastic film coated with a transparent coating layer and a pressure sensitive adhesive layer, said coating layer being made of a mixture of one binder and one or more pigments, wherein the weight ratio of said binder to said pigment is 1: 1 to 1:10, wherein each of the note sheets have an opacity of less than 55% Note pad. The method of claim 1, Knot pad, wherein each knot sheet has an opacity of less than 40%. The method of claim 1, Knot pad, wherein each knot sheet has an opacity of less than 30%. The method of claim 1, Knot pad is selected from the group consisting of polyvinyl alcohol, polyacrylate, polyvinyl acrylate and styrene butadiene rubber, and the pigment is selected from the group consisting of titanium dioxide, calcium carbonate, clay and mixtures thereof. The method of claim 1, Knot pad of each knot sheet is made of a material selected from the group consisting of polypropylene, polyethylene, polyvinyl chloride, polyethylene terephthalate and mylar. The method of claim 1, Knot pad further comprising a release paper covering the coating layer on the plastic film of each note sheet.