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A kind of method of bubbling reaction kettle to prepare environment-friendly mouth rod molding glue
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A molding glue, reaction kettle technology, applied in the direction of adhesive type, monocarboxylate copolymer adhesive, adhesive additive, etc., to improve the cold resistance and leveling effect
Active Publication Date: 2014-10-29
HAINAN BNK WATER BASED NEW MATERIAL CO LTD
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But because all used EVA emulsion in this kind of method, mostly contain formaldehyde in this emulsion, and plasticizer still adopts phthalates, and because of phthalates, formaldehyde, vinyl acetate in cigarette standard The specific limit requirements are also given. During the preparation, the residual amount of vinyl acetate monomer must be considered as low as possible, and the use of harmful raw materials such as phthalates and formaldehyde must be avoided as much as possible.
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Embodiment 1
[0026]
[0027] Take 0.8 kg of initiator, 0.47 kg of emulsifier and 12 kg of deionized water into the bubbling reactor (as shown in the figure), turn on the mixer, set the stirring speed to 200 rpm, and turn on the vacuum device (As shown in Figure 1), after vacuuming, close the vacuuming device, then turn on the nitrogen switch, and the bubbling mouth begins to bubble. At this time, heating makes the temperature rise to 80, and slowly drips 40 kilograms of VAc monomer until After the reaction is complete, cool down to 40°C to obtain PVAc latex. Add 34.6 kg of PVA, 10 kg of acrylate emulsion, 1.5 kg of environmentally friendlyplasticizer, 0.6 kg of defoamer, and 0.03 kg of pH regulator in the bubbling reactor, continue to stir for 2 hours and let it stand for cooling, filter out material.
Embodiment 2
[0029]
[0030] Take 0.7 kg of initiator, 0.4 kg of emulsifier and 12 kg of deionized water into the bubbling reactor (as shown in the figure), turn on the mixer, set the stirring speed to 220 rpm, and turn on the vacuum device (As shown in Figure 1), after vacuuming, turn off the vacuuming device, then turn on the nitrogen switch, and the bubbling port will start bubbling. At this time, heating will make the temperature rise to 83°C, and slowly add 42 kg of VAc monomer dropwise. Until the reaction is complete, the temperature is lowered to 42°C to obtain PVAc latex.
[0031] Add 38 kg of PVA, 5.4 kg of acrylate emulsion, 1.2 kg of environmentally friendly plasticizer, 0.28 kg of defoamer, and 0.02 kg of pH regulator in the bubbling reactor, and continue to stir for 2.5 hours. material.
Embodiment 3
[0033]
[0034] Take 0.37 kg of initiator, 0.3 kg of emulsifier and 15 kg of deionized water into the bubbling reactor (as shown in the figure), turn on the mixer, set the stirring speed to 250 rpm, and turn on the vacuum device (As shown in Figure 1), after vacuuming, turn off the vacuuming device, then turn on the nitrogen switch, and the bubbling port will start bubbling. At this time, heating will increase the temperature to 85°C, and slowly add 45 kg of VAc monomer dropwise. Until the reaction is complete, cool down to 45°C to obtain PVAc latex.
[0035] Add 32 kg of PVA, 6 kg of acrylate emulsion, 1 kg of environmentally friendly plasticizer, 0.3 kg of defoamer, and 0.03 kg of pH regulator to the bubbling reactor in sequence, continue to stir for 3 hours, let it stand for cooling, and filter out the material.
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Abstract
The invention provides a method for preparing environment-friendly filter tip molding glue for a high speed cigarette making machine. The filter tip molding glue is produced through polymerization of VAc monomer in a bubbling reaction kettle. The utilization of the bubbling reaction kettle can reduce vinyl acetatemonomer residual volumes in the produced environment-friendly filter tip molding glue. Environment-friendly plasticizer is used in the method. Formaldehyde, phthalic acid ester and other dangerous substances are not added. The monomer residual volumes of vinyl acetate are further reduced (less than 2.5 milligrams per kilograms). Adding defined amount of acrylateemulsion in the process of polymerization can improve cold endurance and levelling property of the environment-friendly tip molding glue, and the environment-friendly tip molding glue is suitable for the high speed cigarette making machine with the travel speed of 10000-11000 pieces per minute.
Description
technical field [0001] The invention relates to a method for preparing environmentally friendly tip stick molding glue, in particular to a method for preparing environmentally friendly tip stick molding glue for high-speed cigarette machines by using a bubbling reactor, and belongs to the field of cigarette adhesives. Background technique [0002] Adhesives for cigarettes include packing glue, mouthpiece glue, mouthpiece glue and mouth stick molding glue. Mouth stick molding glue is an adhesive used in the production process of cigarette filters. The basic performance indicators are as follows: viscosity is about 2000-2200mPa · s, the pH is usually 4-7. It can be known by document retrieval that most of the current researches on the nozzle rod molding glue focus on improving the taste and eliminating the peculiar smell of the acrylic fiber filter rod, such as patent applications CN90102340 and CN99121623. [0003] Mouth rod forming glue is mainly based on EVA (polyethylene-...
Claims
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