Sulfurized latex is an ammonia glue made from natural latex, sulfur, vulcanization accelerators, fillers and other materials. After the injection, it is dried, vulcanized, and the plastic film obtains good plasticity, abrasion resistance and oil resistance. Its preparation operation is safe and harmless to the human body. The food drum sealant is prepared as follows.
1. Liquid rubber preparation process shown in Figure 1, "red pigment" is edible amaranth, "flat plus" for the condensation of ethylene oxide and fatty alcohol, accelerator "TMTD" for tetramethyl disulfide Lamb, accelerator "D" is diphenyl hydrazine, accelerator "PX" is phenylethyl zinc disulfide carbamate, and "CMS" is carboxy starch.
2. Preparation of various auxiliary agents (1) Preparation of 16% casein solution: 2240 g of casein and 112 g of β-naphthol were ground into a fine powder and mixed with 1094 g of water in an enamel bucket and heated in a water bath to make the cheese absorb water. Soften (temperature about 70-80°C, time 1-2h), use stainless steel or glass rod to keep stirring without precipitation, then add ammonia water, continue stirring till completely dissolved into transparent clear solution, while hot, pour into paraffin oil to continue stirring 2 hour.
(2) Preparation of 50% emulsified paraffinic oil: In an enamel bucket, 5000 g of paraffin oil and 200 g of oleic acid were mixed, and 4600 g of water and 20 g of triethanolammonium were mixed. Such as room temperature can be heated to about 30 °C water to make a transparent liquid. The two liquids are then mixed and stirred well in a blender to form a milky white emulsion.
(3) Preparation of 46.45% Sulfur Dispersion: Pour 1800g of sulfur, 50g CMC, and 2025g of water into a porcelain bowl of a roller mill (with a rotation speed of 48-50r/min and a size of 230x275mm), and add the porcelain ball to close the grinding. 30 -50h.
(4) Preparation of 30% accelerant TMTD dispersion: 900 g of CMC accelerator TMTD, 10 g CMC, and 2085 g of water were poured into a china altar of Xuan Roller Mill, and porcelain balls were added and closed for about 20 hours.
(5) Preparation of 30% accelerator D dispersion: 900 g of accelerator D, 45 g of CMC, and 2055 g of water were poured into a porcelain bowl of a roller mill, and a ceramic ball was added and closed for about 20 hours.
(6) Preparation of 35% accelerator PX dispersion: Pour 1400 g of accelerator PX, 33 g CMC, and 2567 g of water into a porcelain bowl of a roller mill, and add the porcelain ball to seal it for about 20 hours.
(7) Preparation of 43,27% zinc oxide dispersion: 2460 g of zinc oxide, 61.5 g of CMC, 3163.5 g of water were poured into a porcelain bowl of a roller mill, and porcelain balls were added to seal the mixture for about 20 hours.
(8) Preparation of 9% CMC solution: Put 30kg of water into the enamel bucket, add 150ml of ammonia water first, slowly add CMC, stir it while adding, continue stirring for 0.5-1h after adding 3.3kg, then add ammonia, stir To the solution into a completely transparent liquid. The liquid should be capped and stored to prevent the volatilization of ammonia, and the storage period should not be too long, otherwise the viscosity will drop.
3. Liquid glue formula Liquid glue formula is shown in Table 1. The formula water and 10% CMM solution can be increased or decreased according to the production needs and changes in room temperature. For example, on hot days, 10% CMC solution increases and water decreases; in winter, 10% CMC solution decreases, water increases. However, the adjusted total number of 32.5 kg remains unchanged.
Liquid adhesive formula
No. Name Quantity kg %
1 Coal Mine Kaolin 65.000 25.59
2 flat plus 1.000 0.39
3 Red pigment 0.050 0.02
4 water 28.600 11.26
5 16% casein solution 14.000 5.51
6 50% emulsified paraffin oil 10.000 3.94
7 46.45% Sulfur Dispersion 3.500 1.38
8 30% TMTD Dispersion 0.900 0.35
9 30% D dispersion 2.500 0.97
10 35% PX Dispersion 7.000 2.76
11 43.27% zinc oxide dispersion 7.000 2.76
12 Natural Latex 82.000 32.28
13 Water 12.500 4.91
14 10% CMC solution 20.000 7.88
total
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