CN111234746B - Process for producing pressure-sensitive hot melt adhesive - Google Patents
Process for producing pressure-sensitive hot melt adhesive Download PDFInfo
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- CN111234746B CN111234746B CN202010210714.0A CN202010210714A CN111234746B CN 111234746 B CN111234746 B CN 111234746B CN 202010210714 A CN202010210714 A CN 202010210714A CN 111234746 B CN111234746 B CN 111234746B
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- glue
- stirring
- stirring tank
- hot melt
- melt adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/36—Mixing of ingredients for adhesives or glues; Mixing adhesives and gas
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a process for producing pressure-sensitive hot melt adhesive, which comprises the steps of feeding, melting and premixing, homogenizing and emulsifying, mixing and stirring, sample detection, adhesive storage and adhesive preparation.
Description
Technical Field
The invention relates to the field of hot melt adhesives, in particular to a process for producing a pressure-sensitive hot melt adhesive.
Background
The pressure-sensitive hot melt adhesive is an adhesive which needs to be heated and melted for coating processing, is colorless and tasteless in appearance, free of pollution due to the fact that no solvent is contained, relatively simple in production process, stable in performance, environment-friendly, and also an important component of the pressure-sensitive adhesive, and has a tendency of replacing solvent-based pressure-sensitive adhesives in countries such as Europe and America. The solid hot-melt pressure-sensitive adhesive is heated to 150-200 ℃ to become fluid, can be used by spraying, roller coating and other methods, is in a semisolid state when cooled to room temperature, can generate good adhesion effect by slightly applying pressure, is usually coated on paper, foam, plastic film, fabric or metal foil to further prepare a pressure-sensitive adhesive tape or a pressure-sensitive label, and is mainly used for sealing packages, logistics, trademark and label sticking of various cartons and the like.
The traditional manufacturing process of the pressure-sensitive hot melt adhesive mainly adopts a reaction kettle to disperse and mix various materials, multiple steps of stirring, heating, cooling and the like are intensively carried out in the reaction kettle, the hot melt adhesive of an EVA and PUR system is produced by adopting a double-screw extrusion processing mode, but the pressure-sensitive hot melt adhesive (SBS and SIS are block copolymer systems) cannot be produced by using a screw extrusion process simply due to the characteristics of an adhesive system, and the two production modes have defects, namely, the stirring speed is low, the mixing effect of the materials is poor, so that the performance stability of a finished product is poor, the production efficiency is low, and continuous production cannot be carried out.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a process for producing a pressure-sensitive hot melt adhesive.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a process for producing a pressure-sensitive hot melt adhesive comprises the following steps:
1) feeding: inputting materials prepared according to the formula proportion into a hopper through a vacuum feeding machine;
2) melting and premixing: starting a screw extruder, melting and mixing the material in the step 1) in the screw extruder, and rotating the material to enter an emulsifying machine mixing pump;
3) homogenizing and emulsifying: starting an emulsifying machine mixing pump, conveying materials to the emulsifying machine mixing pump by the screw extruder, adjusting the rotating speed of the emulsifying machine mixing pump and adjusting the gap between the inner stator and the rotor of the pump by a frequency converter according to glue parameters of various types, and fully dispersing, homogenizing, emulsifying and refining the materials;
4) mixing and stirring: starting two mixing and stirring tanks which are set as a No. 1 stirring tank and a No. 2 stirring tank, continuously conveying materials by the emulsifying machine mixing pump to the No. 1 stirring tank, stirring for 10min, then opening a vacuum valve to vacuumize for 5min, forming glue in the No. 1 stirring tank, cutting the materials conveyed by the emulsifying machine mixing pump into the No. 2 stirring tank, and repeating the glue making step of the No. 1 stirring tank;
5) sample detection: after the glue in the stirring tank No. 1 or the stirring tank No. 2 is molded, opening a sample detection valve of the stirring tank No. 1 or the stirring tank No. 2, taking 50g of glue to test the performance, and performing the step 6) if the glue is qualified, and adjusting the stirring time and the stirring speed of the stirring tank No. 1 if the glue is not qualified;
6) glue storage: starting a high-temperature gear delivery pump and a glue storage tank, and delivering the glue formed in the No. 1 stirring tank or the No. 2 stirring tank to the glue storage tank for storage or performing the step 7);
7) preparing glue: extruding the glue prepared in the step 6) from a discharge opening at the bottom of the glue storage tank, cooling, forming and packaging.
The set temperature of the screw extruder is 180 ℃, and the rotating speed is 50 r/min.
The setting temperature of the mixing pump of the emulsifying machine is 130 ℃.
The temperature of the mixing and stirring tank is set to be 120 ℃, and the rotating speed is set to be 100 r/min.
The temperature of the high-temperature gear conveying pump is set to be 120 ℃.
The temperature of the glue storage tank is set to be 100 ℃, and the rotating speed is 60 r/min.
The invention has the beneficial effects that: compared with the existing production process, the invention is provided with the screw extruder, the emulsifying machine mixing pump and the mixing and stirring tank, so that the materials are subjected to three stages of premixing, homogenizing and emulsifying and final mixing, the mixing effect of the materials is greatly improved, the quality and the performance stability of the finished pressure-sensitive hot melt adhesive are further improved, meanwhile, the two mixing and stirring tanks are mutually switched to realize continuous production, and the production efficiency is improved.
Detailed Description
The present invention will be further described with reference to the following examples.
A process for producing a pressure-sensitive hot melt adhesive comprises the following steps:
1) feeding: 400kg of materials prepared according to the formula proportion are input into a hopper through a vacuum feeding machine (model ZKS-4, a large-scale vibration equipment company Limited in New county City), and the pressure-sensitive hot melt adhesive mainly comprises SBS, SIS thermoplastic rubber, tackifying resin, plasticizer and stabilizer.
The vacuum material loading machine that this embodiment adopted is pipeline closed transport, has following advantage: the dust environmental pollution can be avoided, the working environment is improved, the pollution of the environment and personnel to materials is reduced, the cleanliness of the materials is improved, and the comprehensive performance of the pressure-sensitive hot melt adhesive is further improved; the pipeline conveys materials, and the occupied space is small; reduce the manpower and improve production efficiency, reduce the recruitment cost of enterprise.
2) Melting and premixing: starting a screw extruder (model SD-100 of Nanjing Guangda chemical equipment Co., Ltd.), setting the temperature of the screw extruder to be 180 ℃ and the rotating speed to be 50r/min, melting and mixing the materials obtained in the step 1) in the screw extruder, and rotating the materials to enter an emulsifying machine mixing pump.
The main function of the screw extruder is to continuously feed and convey material to the emulsifier mixing pump. The material composed of a plurality of raw materials is changed under the action of high temperature and high pressure, the physical state is gradually changed from an elastic solid similar to a rubber state to a viscous fluid state, and then the elastic solid is melted, plasticized and mixed together to complete premixing, and the melted material is conveyed to the tail end of the screw cylinder to enter the mixing pump of the emulsifying machine along with the rotation of the screw.
3) Homogenizing and emulsifying: starting an emulsifying machine mixing pump (Nantong Ono mechanical manufacturing Co., Ltd., model ONG440-2), wherein the set temperature of the emulsifying machine mixing pump is 130 ℃, the screw extruder conveys materials to the emulsifying machine mixing pump, the materials are fully dispersed, homogenized, emulsified and refined in the emulsifying machine mixing pump, and then the rotating speed of the emulsifying machine mixing pump, the internal setting of the pump and the clearance between rotors are adjusted through a frequency converter according to glue parameters of various models, namely the initial viscosity, the holding viscosity, the wetting performance and the adhesion performance parameters of the pressure-sensitive hot melt adhesive finished product are adjusted.
The emulsifying machine mixing pump does high-speed shearing movement, and performs comprehensive effects such as centrifugation, extrusion, grinding, collision, crushing and the like on the materials, so that various raw materials forming the materials are fully dispersed, homogenized, emulsified, refined and mixed.
4) Mixing and stirring: starting two mixing and stirring tanks (Shijiazhuangten broad mechanical equipment factory, model CKJB100), wherein the temperature of the two mixing and stirring tanks is set to 120 ℃, the rotating speed is set to 100r/min, the two mixing and stirring tanks are set to No. 1 and No. 2, the emulsifying machine mixing pump continuously conveys materials to the No. 1 stirring tank, stirring is carried out for 10min, then a vacuum valve is opened for vacuumizing for 5min, glue in the No. 1 stirring tank is formed, and at the moment, the materials conveyed by the emulsifying machine mixing pump are cut into the No. 2 stirring tank to repeat the glue making step of the No. 1 stirring tank.
Through material behind the emulsion machine mixing pump gets into No. 1 agitator tank or No. 2 agitator tank through stirring paddle blade slow rotation in jar, eliminates the internal stress of high-speed shearing, accomplishes the final intensive mixing of whole batch of product to accomplish the step of evacuation defoaming in jar.
5) Sample detection: and (3) after the glue in the stirring tank No. 1 or the stirring tank No. 2 is molded, opening a sample detection valve of the stirring tank No. 1 or the stirring tank No. 2, taking 50g of glue to test the performance, and performing the step 6) if the glue is qualified, and adjusting the stirring time and the stirring speed of the stirring tank No. 1 if the glue is not qualified.
6) Glue storage: starting a high-temperature gear delivery pump (Koch oil Pump works, Pooto, model KCB-83.3) and a glue storage tank (Mida environmental protection machinery Co., Ltd., Dongguan, model 18)*The temperature of the high-temperature gear delivery pump is set to be 120 ℃, the temperature of the glue storage tank is set to be 100 ℃, the rotating speed is 60r/min, and the glue formed in the No. 1 stirring tank or the No. 2 stirring tank is delivered to the glue storage tank for storage or the step 7) is carried out.
7) Preparing glue: extruding the glue prepared in the step 6) from a discharge opening at the bottom of the glue storage tank, cooling, forming and packaging.
The performance parameters of the pressure-sensitive hot melt adhesive prepared in the present example were measured, and the results were as follows:
1. initial adhesion: copper ball # 15 (GB 4852-84 scale);
2. melt viscosity: 2500CPs/180 ℃, (HG/T3660-1999 test standard);
3. softening point: 85 ℃ plus-minus not more than 5 ℃ (GB/T15332-;
4. peeling force: 10N/in2(GB/T2792-1998 Scale);
5. permanent adhesion: 12h (GB/T4851-1998 test standard);
6. gardner color: 0 plus or minus 0.2;
7. the use temperature is as follows: 160-180 ℃.
The machines of the embodiment are connected through conventional connecting pieces such as pipelines, flanges and flange valves according to actual placing positions.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (6)
1. A process for producing a pressure-sensitive hot melt adhesive is characterized by comprising the following steps:
1) feeding: inputting materials prepared according to the formula proportion into a hopper through a vacuum feeding machine;
2) melting and premixing: starting a screw extruder, melting and mixing the material in the step 1) in the screw extruder, and rotating the material to enter an emulsifying machine mixing pump;
3) homogenizing and emulsifying: starting an emulsifying machine mixing pump, conveying materials to the emulsifying machine mixing pump by the screw extruder, adjusting the rotating speed of the emulsifying machine mixing pump and adjusting the gap between a pump inner rotor and a rotor by a frequency converter according to glue parameters of various types, and fully dispersing, homogenizing, emulsifying and refining the materials;
4) mixing and stirring: starting two mixing and stirring tanks which are set as a No. 1 stirring tank and a No. 2 stirring tank, continuously conveying materials to the No. 1 stirring tank by using an emulsifying machine mixing pump, stirring for 10min, then opening a vacuum valve to vacuumize for 5min, forming glue in the No. 1 stirring tank, cutting the materials conveyed by the emulsifying machine mixing pump into the No. 2 stirring tank, and repeating the glue making step of the No. 1 stirring tank;
5) sample detection: after the glue in the stirring tank No. 1 or the stirring tank No. 2 is molded, opening a sample detection valve of the stirring tank No. 1 or the stirring tank No. 2, taking 50g of glue to test the performance, and performing the step 6) if the glue is qualified, and adjusting the stirring time and the stirring speed of the stirring tank No. 1 if the glue is not qualified;
6) glue storage: starting a high-temperature gear delivery pump and a glue storage tank, and delivering the glue formed in the No. 1 stirring tank or the No. 2 stirring tank to the glue storage tank for storage or performing the step 7);
7) preparing glue: extruding the glue prepared in the step 6) from a discharge opening at the bottom of the glue storage tank, cooling, forming and packaging.
2. The process for producing a pressure-sensitive hot melt adhesive according to claim 1, wherein the screw extruder is set at a temperature of 180 ℃ and a rotational speed of 50 r/min.
3. The process for producing a pressure-sensitive hot melt adhesive according to claim 1, wherein the emulsifier mixer pump is set at a temperature of 130 ℃.
4. The process for producing a pressure-sensitive hot melt adhesive according to claim 1, wherein the temperature of the mixing and stirring tanks is set to 120 ℃ and the rotating speed is set to 100 r/min.
5. The process for producing a pressure-sensitive hot melt adhesive according to claim 1, wherein the temperature of the high-temperature gear delivery pump is set to 120 ℃.
6. The process for producing a pressure-sensitive hot melt adhesive according to claim 1, wherein the temperature of the glue storage tank is set at 100 ℃ and the rotating speed is 60 r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010210714.0A CN111234746B (en) | 2020-03-24 | 2020-03-24 | Process for producing pressure-sensitive hot melt adhesive |
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| CN202010210714.0A CN111234746B (en) | 2020-03-24 | 2020-03-24 | Process for producing pressure-sensitive hot melt adhesive |
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| CN111234746B true CN111234746B (en) | 2021-04-20 |
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| FR2783403B1 (en) * | 1998-09-21 | 2000-11-03 | Groupe Danone Sa | PROCESS FOR MANUFACTURING A STRIP OF PETRIE AND EXTRUDED RAW PASTE |
| CN101984011B (en) * | 2010-11-24 | 2012-07-25 | 广东达美新材料有限公司 | Hot melt pressure-sensitive adhesive masterbatch for non-adhesive polyethylene protective film and preparation method thereof |
| CN105250241B (en) * | 2014-07-18 | 2018-09-21 | 南京蓝登生物科技有限公司 | The preparation process of transdermal patch |
| CN109468689A (en) * | 2018-12-06 | 2019-03-15 | 长青藤高性能纤维材料有限公司 | A kind of ultra high molecular weight polyethylene fiber gel spinning method and the soft kneading machine of double ranks using the soft kneading machine of double ranks |
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