SU937496A1 - Sticky tape - Google Patents

Description

(B) STICKY TAPE

The invention relates to the production of adhesive tapes and can be used in the chemical industry, the film industry, photographic materials, etc. The adhesive tape is known. It includes a polymer substrate and an adhesive layer based on synthetic rubber PZ. The adhesive tape has a rather high adhesive ability, However, the use of the tape does not allow the process of regeneration of silver and cellulose triacetate in the areas of emulsion silver-containing film photographic materials covered with adhesive tape, because Radios The components of the adhesive layer do not dissolve or mix with a de-gelatinous solution. At the same time, sections of silver-containing film photographic materials, closed with adhesive tape, are cut out and burned, which leads to irreversible losses of silver and film-photo substrate. The closest in technical essence and the achieved result to the proposed is a sticky tape consisting of a cellulose triacetate substrate and a sticky layer comprising 60-100 wt. gelatin, glucose 2–2, glycerin 2–4 veCoCh, glycerol 8–12 veCnOr ammonium, and 300ijOO veCoR of water 2. However, the known adhesive tape slowly dissolves in the deanitating solution, which slows down the regeneration process of silver-containing film photographic materials. The purpose of the invention is to accelerate the process of restoring cinema photographs. The goal is achieved by the fact that in the adhesive tape, consisting of a cellulose triacetate substrate and a sticky layer comprising gelatin, glucose, glycerin, ammonium ammonium and water, the adhesive layer additionally contains the acid sulphate of isododecyltriethylethyleneglylium (NSCIDT) in a list that follows: , VECOCO: 60-100 Gelatin 2-4 Glucose Glycerol 2 Generic ammonium

CHj CH fJCH-CH CH About OSOjMa

Cgrc

H “5

The composition of the adhesive is prepared as follows.

Gelatin is kneaded in a separate vessel with a small amount of water for swelling (within 30-40 minutes). In another vessel, a solution of glycerol, glucose, ammonium ammonium, 20 NSCIDs in the rest of the water is prepared. Then both solutions are poured into the apparatus with a mechanical stirrer and the contents are stirred for 1-1.5 hours with heating to T 35 ± 5 ° C, after which the prepared composition is fed to the irrigation installation. The results of tests of samples of 50-ki tapes, obtained with the use of the irrigation installation, the glue of nano-triacetate cellulose substrate are as follows:

Application rate

adhesive layer, m / min

3-5

The thickness of the working layer 30-35, microns

Air temperature

in drying, with

After drying, 8-10 water remains in the adhesive layer.

. Table l shows examples of adhesive components.

Table 1 NKSSIDT1,5-3,0 Voda300-YOO NKSIDT is a homogeneous liquid of light brown color with a surface tension of no more than AO dyn / cm at a concentration of 0 O mol / l in an aqueous solution of gelatin. NKSIDT has the formula for the adhesives samples listed in Table. 1, are given in table. 2

57

50

56

160

155

Claims (2)

162 The de-gelatinizing solution is the usual 60DU heated to T with an addition of 5 parts by weight of water per 100 ppm of water. enzyme preparation (biologi "4eski active yeast-like enzyme type). From tab. 2 it follows that the sticky tape with glue according to examples 1-3 desatalinizes faster than the sticky tape is known. The use of adhesive tape will reduce the time of the process of degelatinization of film photographic materials, increase productivity. Claims of the Invention A sticky tape consisting of a cellulose triacetate substrate and a sticky layer comprising gelatin, glucose, glycerin, ammonium rodanate and water, table 2 OLO 0.45 0.2 O, “JO 0, "3 0, characterized in that, in order to speed up the process of restoration of film photographic materials, the adhesive layer additionally contains the sodium salt of isododecyl triethylene glycol acid sulfate in the following ratio of components, parts by weight: Gelatin 60-100 Glucose 2-4 Glycerol 2-4 Rhodium ammonium 8 -12 Sodium salt (acid) sulfate isododecyl triethylene glycol 1 ,, 0 Water 300-4pt) Sources of information that are considered in the examination 1. The author's certificate of the USSR No. 526647, cl. C 09 J 3/14, T974. 2. Lipka tape, STP 6-17-01-16-74 (prototype).