CN108611027B - Environment-friendly hot melt adhesive for high-speed automatic label die-cutting winding machine and preparation method thereof - Google Patents
Environment-friendly hot melt adhesive for high-speed automatic label die-cutting winding machine and preparation method thereof Download PDFInfo
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- CN108611027B CN108611027B CN201810446712.4A CN201810446712A CN108611027B CN 108611027 B CN108611027 B CN 108611027B CN 201810446712 A CN201810446712 A CN 201810446712A CN 108611027 B CN108611027 B CN 108611027B
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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
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winding machine comprises the following components in percentage by mass: 20-40% of EVA (ethylene vinyl acetate), 10-20% of SBS (styrene butadiene styrene), 15-30% of main tackifying resin, 5-20% of auxiliary tackifying resin, 5-18% of viscosity regulator, 0.5-2% of plasticizer and 0-2% of antioxidant. The hot melt adhesive has the characteristics of wide applicability, high reliability, no whirl coating during high-speed winding and environmental protection compliance, can meet the automatic winding requirement of a high-speed automatic die-cutting winding machine, can ensure that the last label can be easily peeled off from a printer during use, has no residual glue on the back of the label, reduces the waste of the last labels, and effectively prevents the damage to the printer.
Description
Technical Field
The invention relates to an environment-friendly hot melt adhesive, which is specially used for sticking a paper tube and label base paper glassine paper on a high-speed automatic label die-cutting winding machine and belongs to the technical field of adhesives.
Background
The hot melt adhesive is a solvent-free solid adhesive prepared by melting and mixing a thermoplastic resin or a thermoplastic elastomer as a main component with a plasticizer, a tackifier resin, an antioxidant and the like. The adhesive has the advantages of no toxicity, no environmental pollution, convenient preparation and the like, is the direction of the market development of the adhesive, has the annual output in the world always in the rising trend, has the highest increasing speed among various adhesives, is more and more diversified in variety and is more and more widely applied.
EVA hot melt adhesive has large cohesive force and small melt surface tension, has hot adhesive force on almost all substances, has the characteristics of excellent chemical resistance, thermal stability, weather resistance and electrical performance, quick adhesion, wide application range, no toxicity, no pollution and the like, is called as green adhesion and attracts more and more attention. The EVA hot melt adhesive has the main performance characteristics that:
1. is normally solid at room temperature, melts into liquid when heated to a certain degree, and quickly becomes solid (i.e. solidifies) once cooled to below the melting point;
2. the adhesive layer has the advantages of fast curing, low pollution, strong adhesive force, certain flexibility, hardness and toughness;
3. the glue solution is coated on the glue layer of the cooled and solidified adherend, and can be heated and melted again to become an adhesive body and then be bonded with the adherend, so that the adhesive body has certain re-adhesiveness;
4. when in use, the hot melt adhesive is heated and melted into the required liquid state, and is coated on an adherend, bonding and solidification can be completed within a few seconds after pressing, and the degree of hardening, cooling and drying can be achieved within a few minutes.
Due to the performance characteristics of the hot melt adhesive, the hot melt adhesive is more and more widely applied, but the traditional hot melt adhesive is required to be stuck, the sticking is firmer and better, and the traditional label die cutting equipment is used for manually sticking labels at a low speed and using a double-sided adhesive tape or a transparent adhesive tape for sticking. The label produced in this way is very troublesome in the use process. When the label is about to be used up, the residual quantity is noticed all the time, so that the label is easily stuck on a printing head to damage the printer, the printing cannot be continuously printed at high speed, and the printing efficiency is low. The label used on the automatic high-speed label die-cutting machine is required to be easily stripped from a paper tube along with the continuous operation of a printer when the last label is used, and the label cannot have any residual glue block or the phenomenon of label sticking and breaking. This can cause excessive printer drag and damage to the printer, and if residual glue is present, expensive print heads on the printer can be damaged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the special environment-friendly hot melt adhesive and the preparation method thereof, which have the characteristics of wide applicability, high reliability, no whirl during high-speed coiling and environmental protection compliance, can meet the automatic coiling requirement of a high-speed automatic die-cutting coiling machine, can ensure that the last label can be easily peeled off from a printer during use, has no residual adhesive on the back of the label, reduces the waste of the last labels, and effectively prevents the printer from being damaged.
The problems stated by the invention are solved by the following technical scheme:
the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winding machine comprises the following components in percentage by mass: 20-40% of EVA (ethylene vinyl acetate), 10-20% of SBS (styrene butadiene styrene), 15-30% of main tackifying resin, 5-20% of auxiliary tackifying resin, 5-18% of viscosity regulator, 0.5-2% of plasticizer and 0-2% of antioxidant.
According to the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder, the content of VA in EVA is 30%, and the melt index is 200.
According to the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder, the main tackifying resin is C9 petroleum resin or hydrogenated C9 petroleum resin; the auxiliary tackifying resin is C5 petroleum resin or hydrogenated C5 petroleum resin.
The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder is characterized in that the viscosity regulator is polyethylene wax.
According to the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder, the plasticizer is dioctyl terephthalate.
The antioxidant is a mixture of an antioxidant 1010 and BHT.
A method for preparing the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winding machine comprises the following steps:
a. temperature setting: setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode;
b. feeding: starting feeding when the temperature outside the kettle reaches 120 ℃, feeding dioctyl terephthalate, antioxidant 1010, BHT and half amount of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min;
c. when the temperature in the kettle reaches 120 ℃, putting EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten;
d. after the EVA is completely melted, adding SBS, and continuously stirring for 40min until the EVA is melted;
e. after the SBS is melted, adding polyethylene wax, the remaining half amount of C9 petroleum resin or hydrogenated C9 petroleum resin and C5 petroleum resin or hydrogenated C5 petroleum resin into a reaction kettle, continuously stirring until the mixture is fully melted, and simultaneously vacuumizing for 40min at the vacuum pressure of 0.08 Mp;
f. and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
The invention provides a special hot melt adhesive and a preparation method thereof, aiming at the sticking characteristics of a paper feeding tube and a label base paper glassine paper of a high-speed automatic label die-cutting winder. The hot melt adhesive disclosed by the invention has the characteristics of wide adaptability (being capable of being used under the humidity condition of 10-40 ℃ and 10-90%), high reliability (the adhesive success rate is more than 99.8%) and environmental protection requirement compliance, and not only can meet the automatic coiling requirement of a high-speed automatic die-cutting separator, but also can ensure that the last label can be easily stripped on a printer when the product is used, no adhesive residue exists on the back surface of the label, the waste of the last labels is reduced, and the damage to the printer can be effectively prevented.
Detailed Description
The adhesive force of the hot melt adhesive can obtain different bonding effects along with the heating temperature of the hot melt adhesive, the difference and the quality of the materials to be adhered, the height and the width of the adhesive, the difference of the running speed of an automatic die cutting and winding machine and the like. The hot melt adhesive is applied in an environment with the environmental temperature of 10-40 ℃ and the humidity of RH 10-90%, so that a high bonding success rate can be ensured, and the bonding success rate is more than 99.8%.
The invention is suitable for the high-speed automatic die cutting and winding machine. After the quantity of every roll of label is set by the die cutting machine, the machine automatically calculates the quantity, when the quantity is required, the paper tube shaft frame automatically rotates to the appointed position, the hot melt adhesive box automatically moves forwards to the appointed position, and the hot melt adhesive coating pinch roller and the paper tube at the appointed position are contacted and compressed tightly and rotate. Because the hot melt adhesive coating rotary wheel is soaked in the adhesive box, the coating rotary wheel coats the hot melt adhesive on the paper tube in the rotating process. The coating runner is a narrow wheel with the width of 2.5mm and the surface of the coating runner is provided with concave-convex threads, so that the bonding strength of the hot melt adhesive and the paper tube is ensured, the stability of the adhesive coating amount is also ensured, and the adhesive box and the coating runner retreat after the coating runner rotates on the surface of the paper tube for 2 to 4 weeks, so that the coating runner is separated from the paper tube. At this time, in order to ensure that the rotating linear speed of the standby paper tube after being coated with glue is consistent with the linear speed of machine production, the standby paper tube needs to be automatically accelerated. Under the action of centrifugal force in the process of accelerating and rotating the standby paper tube, if the viscosity of the hot melt adhesive is not enough to overcome the centrifugal force, the hot melt adhesive is thrown off and falls on the surface of a normally coiled label, and a printing head of a label printer is easily damaged when the label is printed. Therefore, the proportion of the raw materials of the hot melt adhesive needs to be strictly controlled, so that the melting viscosity and the cohesive force of the hot melt adhesive meet the requirements, and the damage to a printing head of a label printer caused by whirl coating is avoided.
Several embodiments of the invention are provided below:
example 1
Setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode; when the temperature outside the kettle reaches 120 ℃, starting feeding, putting 1.0% of dioctyl terephthalate, 0.5% of antioxidant 1010, 0.5% of BHT and 7.5% of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min; when the temperature in the kettle reaches 120 ℃, adding 30% of EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten; after the EVA is completely melted, adding 19% SBS, and continuously stirring for 40min until the EVA is melted; after the SBS is melted, 15% of polyethylene wax, the rest 7.5% of C9 petroleum resin or hydrogenated C9 petroleum resin and 19% of C5 petroleum resin hydrogenated C5 petroleum resin are added into a reaction kettle, the mixture is continuously stirred until the mixture is fully melted, and meanwhile, the mixture is vacuumized for 40min, and the vacuum pressure is 0.08 Mp; and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
Example 2
Setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode; when the temperature outside the kettle reaches 120 ℃, starting feeding, putting 1.5 percent of dioctyl terephthalate, 0.5 percent of antioxidant 1010, 0.5 percent of BHT and 10 percent of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min; when the temperature in the kettle reaches 120 ℃, putting 34% of EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten; after the EVA is completely melted, adding 15% SBS, and continuously stirring for 40min until the EVA is melted; after the SBS is melted, adding 12% of polyethylene wax, the rest 10% of C9 petroleum resin or hydrogenated C9 petroleum resin and 16.5% of C5 petroleum resin hydrogenated C5 petroleum resin into a reaction kettle, continuously stirring until the mixture is fully melted, and simultaneously vacuumizing for 40min at the vacuum pressure of 0.08 Mp; and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
Example 3
Setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode; when the temperature outside the kettle reaches 120 ℃, starting feeding, putting 1.5 percent of dioctyl terephthalate, 0.5 percent of antioxidant 1010, 0.5 percent of BHT and 11.75 percent of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min; when the temperature in the kettle reaches 120 ℃, putting 32% of EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten; after the EVA is completely melted, adding 17% SBS, and continuously stirring for 40min until the EVA is melted; after the SBS is melted, 10% of polyethylene wax, the rest 11.75% of C9 petroleum resin or hydrogenated C9 petroleum resin and 15% of C5 petroleum resin hydrogenated C5 petroleum resin are added into a reaction kettle, the mixture is continuously stirred until the mixture is fully melted, and meanwhile, the mixture is vacuumized for 40min, and the vacuum pressure is 0.08 Mp; and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
Example 4
Setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode; when the temperature outside the kettle reaches 120 ℃, starting feeding, putting 1.0% of dioctyl terephthalate, 0.5% of antioxidant 1010, 0.5% of BHT and 12.5% of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min; when the temperature in the kettle reaches 120 ℃, putting 36 percent of EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten; after the EVA is completely melted, adding 14% SBS, and continuously stirring for 40min until the EVA is melted; after the SBS is melted, adding 11% of polyethylene wax, the rest 12.5% of C9 petroleum resin or hydrogenated C9 petroleum resin and 12% of C5 petroleum resin hydrogenated C5 petroleum resin into a reaction kettle, continuously stirring until the mixture is fully melted, and simultaneously vacuumizing for 40min at the vacuum pressure of 0.08 Mp; and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
Example 5
Setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode; when the temperature outside the kettle reaches 120 ℃, starting feeding, putting 1.0% of dioctyl terephthalate, 0.5% of antioxidant 1010, 0.5% of BHT and 15% of C9 petroleum resin or hydrogenated C9 petroleum resin into a reaction kettle, starting stirring, and stirring for 30 min; when the temperature in the kettle reaches 120 ℃, putting 38% of EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten; after the EVA is completely melted, adding 12% SBS, and continuously stirring for 40min until the EVA is melted; after the SBS is melted, 8% of polyethylene wax, the rest 15% of C9 petroleum resin or hydrogenated C9 petroleum resin and 10% of C5 petroleum resin hydrogenated C5 petroleum resin are added into a reaction kettle, the mixture is continuously stirred until the mixture is fully melted, and meanwhile, the mixture is vacuumized for 40min, and the vacuum pressure is 0.08 Mp; and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
Before the EVA hot melt adhesive is used, the solid adhesive is preheated and melted firstly. The preheating of the hot melt adhesive is carried out by heating and melting the hot melt adhesive through an adhesive groove with a heating plate on an automatic die cutting and winding machine, the preheating time is generally 1h, and the preheating is qualified when the adhesive reaches the required heating temperature and has good fluidity.
Preheating temperature: the softening point of the hot melt adhesive should generally be above 80 ℃, i.e. when heated to 80 ℃, the colloid begins to soften and dissolve. The temperature is only the melting temperature of the hot melt adhesive, and the heating temperature is increased to 110-150 ℃ to ensure that the hot melt adhesive is melted to a degree capable of bonding. At the temperature, the viscosity, fluid, viscosity and the like of the colloid are all suitable for the working requirements of the automatic die-cutting winder. The base materials suitable for sticking the hot melt adhesive are a paper tube and glassine paper, and because the mechanism of the glassine paper is compact, the glue solution of the hot melt adhesive is not easy to permeate into the paper, so that the paper tube can be easily separated during subsequent use, and the paper or the residual glue blocks are not easy to be broken.
In the actual production process, the adhesive force of the hot melt adhesive can obtain different bonding effects along with the heating temperature of the hot melt adhesive, the difference and the quality of the materials to be adhered, the height and the width of the adhesive coating, the difference of the running speed of the automatic die cutting and winding machine and the like.
Claims (5)
1. The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winding machine is characterized by being used for meeting the automatic coiling requirement of a high-speed automatic label die-cutting winding machine aiming at the sticking characteristics of a paper feeding pipe and label base paper glassine paper of the high-speed automatic label die-cutting winding machine and ensuring that a last label can be easily stripped on a printer when in use, and the back of the label has no residual adhesive, and the hot melt adhesive consists of the following components in percentage by mass: 20-40% of EVA (ethylene vinyl acetate), 10-20% of SBS (styrene butadiene styrene), 15-30% of main tackifying resin, 5-20% of auxiliary tackifying resin, 5-18% of viscosity regulator, 0.5-2% of plasticizer and 0-2% of antioxidant, wherein the plasticizer is dioctyl terephthalate; the viscosity regulator is polyethylene wax.
2. The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder according to claim 1, characterized in that: the content of VA in the EVA is 30%, and the melt index is 200.
3. The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder according to claim 1, characterized in that: the main tackifying resin is C9 petroleum resin or hydrogenated C9 petroleum resin; the auxiliary tackifying resin is C5 petroleum resin or hydrogenated C5 petroleum resin.
4. The environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder according to claim 1, characterized in that: the antioxidant is a mixture of antioxidant 1010 and BHT.
5. A method for preparing the environment-friendly hot melt adhesive for the high-speed automatic label die-cutting winder according to any one of claims 1 to 4, which is characterized by comprising the following steps:
a. temperature setting: setting the temperature outside the reaction kettle to be 150 ℃, and controlling the temperature by adopting an automatic temperature control mode;
b. feeding: starting feeding when the temperature outside the kettle reaches 120 ℃, feeding dioctyl terephthalate, antioxidant 1010, BHT and half amount of C9 petroleum resin or hydrogenated C9 petroleum resin into the reaction kettle, starting stirring, and stirring for 30 min;
c. when the temperature in the kettle reaches 120 ℃, putting EVA into the reaction kettle, and continuously stirring for 35min until the EVA is molten;
d. after the EVA is completely melted, adding SBS, and continuously stirring for 40min until the EVA is melted;
e. after the SBS is melted, adding polyethylene wax, the remaining half amount of C9 petroleum resin or hydrogenated C9 petroleum resin and C5 petroleum resin or hydrogenated C5 petroleum resin into a reaction kettle, continuously stirring until the mixture is fully melted, and simultaneously vacuumizing for 40min at the vacuum pressure of 0.08 Mp;
f. and pumping the hot melt adhesive into a storage tank after vacuumizing, placing the storage tank on a granulator for cooling, cutting and granulating, drying, packaging and warehousing.
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| CN112455007B (en) * | 2019-09-06 | 2023-01-31 | 厚旌盛精化股份有限公司 | Method for manufacturing paper straw |
| CN110511697B (en) * | 2019-09-09 | 2021-04-06 | 广州飞胜智能科技股份有限公司 | Modified hot melt adhesive composite material capable of being printed in 3D mode, preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103946333A (en) * | 2011-10-05 | 2014-07-23 | 波士胶公司 | Petrolatum containing hot melt bottle labeling adhesive |
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| CN105219298A (en) * | 2014-07-02 | 2016-01-06 | 蒋寿悟 | A kind of recessed native hot melt adhesive and preparation method thereof |
| CN105778837A (en) * | 2014-12-24 | 2016-07-20 | 党庆风 | A low-temperature resistant type hot-melt pressure-sensitive adhesive |
| CN104610892B (en) * | 2014-12-25 | 2016-08-17 | 湖南鑫湘环保胶业科技有限公司 | A kind of formula of environmental protection granule thermotropic pressure sensitive glue and preparation method thereof |
| CN105295789A (en) * | 2015-11-25 | 2016-02-03 | 广州旭川合成材料有限公司 | Environmental-protection hot melt adhesive for interior and exterior decoration of automobile and preparation method of hot melt adhesive |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103946333A (en) * | 2011-10-05 | 2014-07-23 | 波士胶公司 | Petrolatum containing hot melt bottle labeling adhesive |
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Address after: 051130 No.405 Yuanshi street, Yuanshi County, Shijiazhuang City, Hebei Province Patentee after: Hebei Fangda New Materials Co.,Ltd. Address before: 051130 No.405 Yuanshi street, Yuanshi County, Shijiazhuang City, Hebei Province Patentee before: HEBEI FANGDA PACKAGING CO.,LTD. |