SU907123A1 - Error-correcting material for typing - Google Patents

Description

(54) CORRECTIVE MATERIAL FOR MASHIPS

. This invention relates to a correction material for correcting erroneous characters in typewritten printing, which is operated by the clogging method. Known correction material for typewriting, made of paper-base and coating containing white pigment, binding agent is a copolymer of vinyl chloride and vinyl acetate, as well as aluminum or bronze powder. This material works by clogging. When a typewriter is struck on the reverse side of a correction paper with respect to the coating, the latter closes (masks) the sign to be corrected. Then, by subsequent strikes with the letter on the masked surface, a new mark 1 is applied. However, such correction material has an increased mark-off. Closest to the invention is a correction material consisting of a paper or film substrate and a coating containing a white pigment, a binder and a plasticizer. The coating of this material as a binder contains polyvinyl butyral. In addition, the coating contains tertbugyl-phenol-formaldehyde resin (for example, grade F-6O), which acts as a surfactant. The well-known typewriter correction material provides a high degree of masking of the erroneous character 2l. The disadvantage of the known material is that for the perception of a new sign, three strokes are needed with the typewriter letter. In addition, this material can only be made by applying a corrective coating on a substrate from a pigment slurry in an organic solvent, for example toluene, alcohol or ethyl acetate. This limits the possibility of making corrective paper only in explosion-proof industries. 39: i. . pr; rG; HSi - increase of the effect- .. Gh;: ppp1G |; and of the good sign. ;; -: g -: ipchh chain is achieved by, - / XLpp-KiHpjiomsM. material, the state is: is 5: /: small or soft substrate IV n: ok; .1Si-7, containing white pigment ma ociose ghtana dioxide, plastc ficago to binder, cellulose containing ef 1f cellulose coating in the following ratio of components in the coating, wt%: White pigment 93,7-98,14 Cellulose ether 1,39-2,8 Pasteef grker 0,3-3,5 Coating surface t from an aqueous or organic solvent with a dry matter content of 25–50%, followed by removal of the solvent at 25–100 ° C, can be used as simple cellulose ether, . and esters, for example methylcellulose, ethylcellulose, benyl cellulose, oxyethylcellulose, carboxymethylcellulose, cellulose acetates, acetobuphate cellulose nitrocellulose, and other known cellulose ethers, as well as their mixtures, the effect of the cellulose is applied to a template, and you can apply a template message, you can use a template, or you can apply a template message, you can use a template, or a cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate, cellulose acetate. applied solvent. Titanium dioxide pigment HJTO is suggested as white shagment; predominantly rstyling forms. When using the anatase form, the time of dispersion increases by 2–3 Pa aa, K titanium dioxide can be increased by up to 30% of the mass of ta / Hc. kaolin, Gla-4 ks, carbon dioxide 7s, silica: (.npvrra known white pigments. c-tps pasttr-cutter I can get ttolt -:; - ol: W-: G.PGScherIN, YAOLIGLICOLI. EFI G .:., high molecule peaceful acidic acids, phthalic acid effector, aryl phosphoric deposits. Koryek pfiruyushchy material can be b / tog but with lrpt.Yu. however, with: l: the ratio of the last effect is (the material is reduced somewhat, the water can be used as a solvent, Synthetic, aromatic and aromatic carbon,: -, including chlorinated or rajTiie solvents, are commonly used {, paint and varnish and paint industry, ryl max GvteciT, Ratio and dry substance and a solvent is recommended to choose so that the viscosity of the resulting suspension in this case, the viscometer had a value of 15 to 30 s and a coating application value of 11 to 35. Paper or a synthetic film could be used as a substrate. Example. In a laboratory ball mill, the compositions of corrective coatings A and B are prepared. To the solution of cellulose ether, add titanium dioxide, a plasticizer and disperse for 8 hours. The resulting dispersion is applied on a doctor blade to base paper and the solvent is removed by evaporation. The resulting correction b gmagu is tested on an electromechanical writing mask Yagran with H-font, Table. Table 1-4 shows the composition of the corrective coating and the operational indicators of the corrective paper and film (Table 2). Example 2. Correction coating compositions using two cellulose ethers (C and D) as binding mixtures are prepared similarly to the pr-ger 1, are applied to the polyester film and the corrective blanket are tested as in Example 1. Pr and measure 3. The compositions of the correction coatings (1) and E) with the use of a plasticizer and without it are prepared analogously to example 1, are applied to base paper and the resulting correction material is tested as in example 1. EXAMPLE 4 . The compositions of the corrective coating according to the known and proposed coatings (W, 3, I) with replacements Resin for cellulose ether is prepared analogously to Example I. A coating is applied on the base paper and tested as in Example 1. The data on the coating compositions are given in Table 4. As can be seen from the examples and tables, corrective material made of bulge or film substrate and corrective pokE, 1Ti, containing cellulose ether, provides a more effective perception of the new sign as compared to the known and 1-kmegt simpler composition of the pokrglti. In addition, the introduction of a correction material of cellulose ether into the coating makes it possible to manufacture the composition of the corrosion-forming coating in water horns1; h, which reduces the ages for its input, improves the working conditions of the workers, and carries out the technological process in enterprises not silt

Titanium Dioxide

Cellulose pulp

Cell Acetobutyrate

Glycerol

Dibutyl sebacate

Water

Ethyl acetate

Toluene

Masking the OCHBOOK SIGN

Ritual of the new sign (the number of strokes of the typewriter)

Enchanting

Dioxide Guitar

Megylcellulose

Tilcellulose

Oxycellulose ail

Glycerol

Water

Ethanol

Masking the oimi6o4Horo sign

Perception of a new mark {number of strokes)

Note off 90

97.20 1., 84 0.96

90

5O

Satisfactory satisfactory

2

I

Weak weak

table 2

98.14

93.70

g, bg

O, 83 g, 19

0.73

Oh, ZO

3,5O

2O, OO 40.00

12O, OO

Satisfactory satisfactory

2

2

Weak

Weak e: oxyegyl cellulose is used in the composition of g in the form of an aqueous solution of equipment and equipment in the explosive version and does not require the observance of special safety conditions. Table I

E gilcellulose

Sodium salt of caroxyme hellcellulose Notes

Claims (1)

Claims for the fact that, with a view to a corrective material for machine-enhancing efficiency of novelty writing, consisting of paper or film 55, a coating as a skuy substrate and a coating containing ceppeps ether with a white pigment based on dioxide dioxide -the next ratio komgontogtv in on, binder and plasticizer, about t l and-coating, wt.%: Table 3 0.74 0.37 e: Methylcellulose and sodium salt of hemicellarboxyme are administered in the form of 3-5% aqueous solutions. 990712310 White pigment 93,7-98,14I. UK patent Cellulose ether 1,39-2,8N 1273711, cl. D2B, 1972. Plasticizer of 0.3-3.52. USSR author's certificate Information sources, according to application number 2776О02 / 29-12, taken into account when examining cl. B 41 J 29/26, 31.O8.79.