CN109266234B - Coating process of water-based hot-melt adhesive tape - Google Patents
Coating process of water-based hot-melt adhesive tape Download PDFInfo
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- CN109266234B CN109266234B CN201810935024.4A CN201810935024A CN109266234B CN 109266234 B CN109266234 B CN 109266234B CN 201810935024 A CN201810935024 A CN 201810935024A CN 109266234 B CN109266234 B CN 109266234B
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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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
- 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
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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
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention provides a coating process of a water-based hot melt adhesive wrapping tape. The coating process comprises the following steps: 1) unreeling the base material, and pressing the running base material by adopting a press roller, wherein the running direction of the press roller contacted with the base material forms an included angle with the running direction of the base material; 2) rotating the glue transferring roller to transfer the water-based hot melt adhesive to the glue applying roller, and applying glue to the substrate by the glue applying roller; 3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control; 4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot melt adhesive tape. The coating process of the water-based hot melt adhesive tape has the advantages of simple process, safety, no toxicity, uniform and stable adhesive layer thickness, natural winding and unwinding, no stickiness, appearance quality and bonding performance equivalent to those of a film prepared by a solvent-based hot melt adhesive coating process, low energy consumption and high efficiency, and can replace the conventional solvent-based hot melt adhesive product.
Description
Technical Field
The invention belongs to the technical field of processing of hot-melt adhesive tape, and relates to a coating process of a water-based hot-melt adhesive tape.
Background
The hot melt adhesive is an adhesive which has no viscosity or very low viscosity at normal temperature and has viscosity after being heated, the hot melt adhesive tape is an adhesive tape type product manufactured by extruding or coating the traditional hot melt adhesive, and the hot melt adhesive tape has the advantages of easy die cutting and processing and easy gluing while the characteristics of the hot melt adhesive are kept. In the gluing process, the adherend can be bonded only by preheating the adherend and then pressing and attaching the adherend to the adhesive tape, a special hot gluing device is not needed, and the adherend can be aligned and then heated and attached again, so that the processing difficulty is greatly reduced, the yield is improved, and the adhesive tape is popular among electronic processing manufacturers.
CN108250993A discloses a formula and a preparation method of a substrate-free low-temperature reactive hot-melt adhesive tape, the adhesive tape is prepared by solvent type hot-melt glue, and the glue comprises the following raw materials in parts by weight: 100-150 parts of thermoplastic polyurethane, 50-150 parts of rosin glyceride, 1-40 parts of closed cross-linking agent, 1-10 parts of wetting and leveling agent, 1-10 parts of defoaming agent, 1-10 parts of rheological agent, 0.1-5 parts of anti-aging agent and 100-400 parts of solvent; the solvent comprises two components of a ketone solvent and an ester solvent, wherein the ketone solvent is selected from any one or more of acetone, butanone and cyclohexanone; the ester solvent is selected from one or more of methyl acetate, ethyl acetate and butyl acetate. The preparation method of the substrate-free low-temperature reactive hot melt adhesive tape comprises the following steps: (1) uniformly coating the glue for the substrate-free low-temperature reactive hot-melt adhesive tape on a high release force surface of a substrate in a comma scraper or anilox roller or slit extrusion or tape casting manner, wherein the coating dry weight thickness is 0.020-0.135mm, and drying the coated glue through a drying tunnel at a linear speed of 1.5-5 m/min; (2) and directly rolling the dried adhesive tape, and cutting the adhesive tape into a standard width to obtain the substrate-free low-temperature reaction type hot-melt adhesive tape. The substrate-free low-temperature reactive hot-melt adhesive tape has mild gluing conditions, can be activated at a lower temperature (90-110 ℃), and has short required hot pressing time and low pressing strength; however, the solvent-type hot melt adhesive contains a solvent, and the used solvent has certain potential safety and environmental protection hazards; when the hot melt adhesive tape is prepared, the thickness of the coated adhesive layer is uneven and easy to be sticky.
The hot-melt wrapping tape is mainly applied to high-speed data transmission cables, the conventional hot-melt wrapping tape adopts a solvent type hot-melt adhesive, the solvent type hot-melt adhesive adopts a large amount of organic solvents such as benzene, dimethylbenzene or vinyl acetate and the like in the production and use processes, and the organic solvents bring a series of problems in the aspects of safety, environmental protection, occupational health and the like. If solvent-free hot melt adhesives are used, special equipment must be purchased. Therefore, it is necessary to apply an aqueous hot melt adhesive to a conventional three-roll coater, and the aqueous hot melt adhesive applied to the three-roll coater has problems such as unevenness and stickiness of the adhesive layer.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the coating process of the water-based hot melt adhesive wrapping tape, which is safe and environment-friendly, and the water-based hot melt adhesive has good appearance quality and bonding performance after being coated on a three-roller coating machine, the thickness of an adhesive layer is uniform and stable, and the wrapping and unwinding are natural and are not sticky.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coating process of an aqueous hot-melt adhesive tape, which comprises the following steps:
1) unreeling a base material, and pressing the running base material by adopting a pressing roller, wherein the running direction of the pressing roller contacted with the base material forms an included angle with the running direction of the base material;
2) rotating the glue transferring roller to transfer the water-based hot melt adhesive to the gluing roller, and gluing the substrate by the gluing roller; the sizing amount of the sizing roller is controlled by adjusting the gap between the metering roller and the sizing roller; the rotating directions of the sizing roller and the metering roller are the same as the rotating direction of the press roller, and the rotating direction of the transfer roller is opposite to the rotating direction of the press roller;
3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control;
4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot-melt adhesive tape.
In the coating process, a base material is unreeled and runs, the base material is pressed downwards through a press roll, the base material is concave downwards when running, the running direction of the press roll which is in contact with the base material is consistent with the running direction of the base material and forms an included angle, the gluing is firmer after the base material is in contact with a gluing roll, a glue transfer roll is rotated, hot melt glue in a glue tank is transferred to an upper glue roll through the glue transfer roll, the using amount of the glue is adjusted by adjusting the gap between the gluing roll and a metering roll, a scraper is timely adopted to scrape off redundant glue on the glued metering roll, the uniform stability of the glued glue layer is ensured by adjusting the rotating speed ratio of the press roll, the glue transfer roll, the gluing roll and the metering roll, and finally the hot melt glue is uniformly coated on the base material after drying.
In the step 1), the unreeling speed of the base material is 25-70 m/min, for example, the unreeling speed of the base material is 25m/min, 30m/min, 35m/min, 40m/min, 45m/min, 50m/min, 55m/min, 60m/min, 65m/min, 70 m/min.
Preferably, the rotation speed of the press roll is 73-170 r/min, for example, the rotation speed of the press roll is 73r/min, 75r/min, 80r/min, 83r/min, 85r/min, 90r/min, 93r/min, 95r/min, 100r/min, 103r/min, 105r/min, 110r/min, 113r/min, 115r/min, 120r/min, 123r/min, 125r/min, 130r/min, 133r/min, 135r/min, 140r/min, 143r/min, 145r/min, 150r/min, 153r/min, 155r/min, 160r/min, 163r/min, 165r/min, 170 r/min.
In the step 1), the included angle is 30-45 degrees, for example, the included angle is 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, 36 degrees, 37 degrees, 38 degrees, 39 degrees, 40 degrees, 41 degrees, 42 degrees, 43 degrees, 44 degrees, and 45 degrees.
In step 1), the substrate is a polyester film.
In the step 1), the thickness of the base material is 9-115 μm, for example, the thickness of the base material is 9 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 115 μm.
In the step 2), the rotation speed of the transfer roller is 71-164 r/min, for example, the rotation speed of the transfer roller is 71r/min, 75r/min, 80r/min, 81r/min, 85r/min, 90r/min, 91r/min, 95r/min, 100r/min, 101r/min, 105r/min, 110r/min, 111r/min, 115r/min, 120r/min, 121r/min, 125r/min, 130r/min, 131r/min, 135r/min, 140r/min, 141r/min, 145r/min, 150r/min, 151r/min, 155r/min, 160r/min, 161r/min and 164 r/min.
Preferably, the rotating speed of the sizing roller is 45-107 r/min, for example, the rotating speed of the sizing roller is 45r/min, 55r/min, 65r/min, 75r/min, 85r/min, 95r/min, 105r/min and 107 r/min.
Preferably, the rotation speed of the metering roller is 38-92 r/min, for example, the rotation speed of the metering roller is 38r/min, 43r/min, 48r/min, 53r/min, 58r/min, 63r/min, 68r/min, 73r/min, 78r/min, 83r/min, 88r/min and 92 r/min.
In the step 2), the gluing amount is 2-4.5 g/m2For example, the amount of sizing is 2g/m2、2.5g/m2、3g/m2、3.5g/m2、4g/m2、4.5g/m2。
In the step 2), the gap between the metering roller and the sizing roller is 3-9 μm, for example, the gap between the metering roller and the sizing roller is 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm.
In the step 2), the water-based hot melt adhesive comprises the following components in parts by weight:
specifically, the water-based hot melt adhesive comprises the following components in parts by weight:
50-60 parts of water, for example, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts and 60 parts of water.
35-45 parts of ethylene and copolymers thereof, for example, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts and 45 parts of ethylene and copolymers thereof.
3-5 parts of wax, for example, 3 parts, 3.5 parts, 4 parts, 4.5 parts and 5 parts of wax.
1 to 1.5 parts of 2, 6-di-tert-butyl-p-cresol, for example, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts of 2, 6-di-tert-butyl-p-cresol.
2-4 parts of isopropanol, for example, 2 parts, 2.5 parts, 3 parts, 3.5 parts and 4 parts of isopropanol.
In the step 3), the four stages of the hot air drying of the drying tunnel are specifically as follows: the first temperature is 90-110 ℃, the second temperature is 100-120 ℃, the third temperature is 110-130 ℃ and the fourth temperature is 80-100 ℃.
As a preferable scheme of the invention, the coating process of the water-based hot melt adhesive wrapping tape comprises the following steps:
1) unreeling a polyester film at the speed of 25-70 m/min, and pressing down a running base material by using a press roller, wherein the rotating speed of the press roller is 73-170 r/min, and an included angle of 30-45 degrees is formed between the running direction of the press roller contacted with the base material and the running direction of the base material;
2) rotating the transfer roller to transfer the water-based hot melt adhesive to the upper rubber roller, and gluing the base material by the upper rubber roller, wherein the gluing amount is 2-4.5 g/m2(ii) a Wherein the gap between the metering roller and the gluing roller is 3-9 μm; the rotating directions of the sizing roller and the metering roller are the same as the rotating direction of the press roller, and the rotating direction of the transfer roller is opposite to the rotating direction of the press roller; the rotating speed of the transfer roller is 71-164 r/min, the rotating speed of the sizing roller is 45-107 r/min, and the rotating speed of the metering roller is 38-92 r/min;
3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control, and the four sections of temperature of the drying tunnel in the hot air drying process are specifically as follows: the first-stage temperature is 90-110 ℃, the second-stage temperature is 100-120 ℃, the third-stage temperature is 110-130 ℃ and the fourth-stage temperature is 80-100 ℃;
4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot-melt adhesive tape.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the coating process of the water-based hot melt adhesive tape, the rotating speed ratio of the press roll, the transfer roll, the sizing roll and the metering roll is adjusted, so that the thickness of the sized adhesive layer is uniform and stable; the sizing amount is determined by adjusting the gap between the sizing roller and the metering roller, and the sizing amount is 2-4.5 g/m2(ii) a The winding and unwinding are natural and are not sticky; the adhesive property of the water-based hot melt adhesive coated polyester film is equivalent to that of the solvent-based hot melt adhesive coated polyester film, the viscosity of the water-based hot melt adhesive coated polyester film before aging is 91-203 gf/cm, and the viscosity of the water-based hot melt adhesive coated polyester film after aging is 80-166 gf/cm.
(2) Compared with the solvent type hot melt adhesive coating, the water-based hot melt adhesive coating process is environment-friendly and economical, and has the appearance quality and the bonding performance equivalent to those of the solvent type hot melt adhesive coating process.
Drawings
FIG. 1 is a schematic flow diagram of a coating process for a water-based hot melt adhesive tape of the present invention;
the reference numbers are as follows:
1-a substrate; 2-a press roll; 3-transfer roller; 4-gluing a rubber roller; 5-a metering roll; 6-glue groove.
Detailed Description
The technical solution of the present invention is further described by the following specific embodiments with reference to fig. 1.
The flow schematic diagram of the coating process of the water-based hot melt adhesive belting is shown in figure 1, a substrate 1 is unreeled and operated, the substrate is pressed downwards through a press roll 2, the substrate is concave downwards when in operation, the operation direction of the press roll which is in contact with the substrate is consistent with the operation direction of the substrate and forms an included angle, the glue is more firmly coated after being in contact with a gluing roll, a glue transfer roll 3 is rotated, water-based hot melt adhesive in a glue tank 6 is transferred to a glue transfer roll 4 through the glue transfer roll 3, the glue consumption is adjusted by adjusting the gap between the glue transfer roll 4 and a metering roll 5, surplus glue on the gluing metering roll is scraped off in time by a scraper, the uniform stability of the glued glue layer is ensured by adjusting the rotating speed ratio of the press roll, the glue transfer roll and the metering roll, and finally the water-based hot melt adhesive is uniformly.
The invention relates to a coating process of a water-based hot melt adhesive wrapping tape, which comprises the following steps:
1) unreeling a base material, and pressing the running base material by adopting a pressing roller, wherein the running direction of the pressing roller contacted with the base material is consistent with the running direction of the base material and forms an included angle;
2) rotating the glue transferring roller to transfer the water-based hot melt adhesive to the gluing roller, and gluing the substrate by the gluing roller; the sizing amount of the sizing roller is controlled by adjusting the gap between the metering roller and the sizing roller; the rotating directions of the sizing roller and the metering roller are the same as the rotating direction of the press roller, and the rotating direction of the transfer roller is opposite to the rotating direction of the press roller;
3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control;
4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot-melt adhesive tape.
The water-based hot melt adhesive comprises the following components:
the coating processes such as the running speed of a substrate, the rotating speeds of a press roll, a sizing roll, a metering roll and a transfer roll, and the gap between the sizing roll and the metering roll are specifically shown in table 1, wherein the substrate is a PET film with the thickness of 23 microns, and the rest is water-based hot melt adhesive except that the solvent-based hot melt adhesive is adopted in the comparative example 1, and the solvent-based hot melt adhesive comprises the following components in the comparative example 1:
TABLE 1 coating process for hot-melt taping
The hot melt adhesive coated films prepared by the coating processes of examples 1 to 7 and comparative examples 1 to 4 were subjected to performance tests, the appearance quality and the performance test results of the hot melt adhesive coated films are shown in table 2, wherein the aging test was carried out in an oven at 115 ℃ for 168 hours; heat seal Strength test referring to ZBY 28004-86 Plastic film packaging bags the test specimens were made as follows:
2 sheets of 200mm × 200mm films were hot-pressed on a heat seal strength meter under the following conditions: 0.2MPa, 135 ℃ and 1.5s, wherein the hot-pressing surface of one film is the surface with glue, and the hot-pressing surface of the other film is the surface without glue. Then, the width of the sample is cut to be 15 +/-0.1 mm, the development length is 100 +/-1 mm, the state of the sample is adjusted for 4 hours at the temperature of 23 +/-2 ℃ and in a normal wet state, the sample with the adjusted state takes a heat seal part as a central line, the sample is developed for 180 degrees, two ends of the sample are respectively clamped on two clamps of a testing machine, the longitudinal axis of the test is coincided with the central lines of the upper clamp and the lower clamp, the distance between the clamps is 50mm, and the speed is 200 +/-20 mm/min.
TABLE 2 test results of appearance quality and performance of hot-melt wrapping tape
As can be seen from tables 1 and 2, in comparative examples 1 to 7, the coating amount of the aqueous hot melt adhesive gradually increased and the viscosity gradually increased as the gap between the sizing roller and the metering roller gradually increased, and the sizing amount was increased from 2.4g/m after the gap was increased from 3 μm to 9 μm2Increased to 4.5g/m2The tackiness increased from 91gf/cm to 203 gf/cm. When the gap was as large as 15 μm, as in comparative example 2, the degree of tackiness became worse and the gum layer was adhered to the films on both sides.
Compared with the example 3, the comparative example 1 adopts the solvent type hot melt adhesive, the viscosity is slightly larger, but the difference between the two is not large, and the adhesive layer is uniform, flat and non-sticky; from the view of process parameters, the water-based hot melt adhesive coating needs the drying tunnel temperature of 100/110/120/90 ℃ and the winding and unwinding speed of 45m/min, while the solvent-based hot melt adhesive coating needs the drying tunnel temperature of 100/120/130/95 ℃ and the winding and unwinding speed of 30m/min, so that the solvent-based hot melt adhesive coating needs higher drying temperature and the winding and unwinding speed of the base material is slower.
The number of revolutions of the size roll in example 3 compared to comparative examples 3-4: the rotating speed of the metering roller: the rotating speed ratio of the delivery roller is 4:3:4, and the glue layer is uniform and flat. When the rotating speed of the metering roller is reduced, if the rotating speed ratio of the three rollers in the comparative example 3 is 4:2:4, the film has serious stickiness after being wound; when the rotation speed of the metering roller is increased, as in comparative example 4, the rotation speed ratio of the three rollers is 9:10:9, the glue layer is wavy, uneven and uneven, and the glue amount in each area is more or less, namely 1.8g/m2To 3.9g/m2And (4) internal variation.
In conclusion, the coating process of the aqueous hot melt adhesive coated PET film on a three-roller machine comprises the following steps of winding and unwinding speed of 45m/min, drying tunnel temperature of 100/110/120/90 ℃, gap between a sizing roller and a metering roller of 7 mu m, and rotating speed of the sizing roller: the rotating speed of the metering roller: when the rotating speed ratio of the delivery rollers is 4:3:4, the difference from the solvent type hot melt adhesive is small in appearance quality and viscosity performance; from the viewpoint of the harmfulness of volatile matters, the coating is more environment-friendly and safer than solvent-based hot melt adhesives; compared with solvent type hot melt adhesive coating, the coating has the advantages of low energy consumption and high efficiency from the aspects of production energy consumption and efficiency.
The above examples are only intended to illustrate the detailed process of the present invention, and the present invention is not limited to the above detailed process, i.e., it is not intended that the present invention necessarily depends on the above detailed process for its implementation. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (5)
1. A coating process of a water-based hot-melt adhesive tape belt is characterized by comprising the following steps:
1) unreeling a base material, and pressing the running base material down by adopting a pressing roller, wherein the running direction of the pressing roller contacted with the base material and the running direction of the base material form an included angle of 30-45 degrees; the unreeling speed of the base material is 25-70 m/min, and the rotating speed of the press roll is 73-170 r/min;
2) rotating the glue transferring roller to transfer the water-based hot melt adhesive to the gluing roller, and gluing the substrate by the gluing roller; the sizing amount of the sizing roller is controlled by adjusting the gap between the metering roller and the sizing roller; the rotating directions of the sizing roller and the metering roller are the same as the rotating direction of the press roller, and the rotating direction of the transfer roller is opposite to the rotating direction of the press roller; wherein the rotating speed of the transfer roller is 71-164 r/min, the rotating speed of the sizing roller is 45-107 r/min, and the rotating speed of the metering roller is 38-78 r/min; the gluing amount is 2-4.5 g/m2The gap between the metering roller and the gluing roller is 3-9 mu m;
3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control; the four-section temperature of the drying tunnel hot air drying is as follows: the first-stage temperature is 90-110 ℃, the second-stage temperature is 100-120 ℃, the third-stage temperature is 110-130 ℃ and the fourth-stage temperature is 80-100 ℃;
4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot-melt adhesive tape.
2. The coating process according to claim 1, wherein in step 1), the substrate is a polyester film.
3. The coating process according to claim 1, wherein the thickness of the substrate is 9 to 115 μm.
4. The coating process according to claim 1, wherein in step 2), the aqueous hot melt adhesive comprises the following components in parts by weight:
50-60 parts of water
35-45 parts of ethylene and ethylene copolymer
3-5 parts of wax
1-1.5 parts of 2, 6-di-tert-butyl-p-cresol
2-4 parts of isopropanol.
5. Coating process according to claim 1, characterized in that it comprises the following steps:
1) unreeling a polyester film at the speed of 25-70 m/min, and pressing down a running base material by using a press roller, wherein the rotating speed of the press roller is 73-170 r/min, and an included angle of 30-45 degrees is formed between the running direction of the press roller contacted with the base material and the running direction of the base material;
2) rotating the transfer roller to transfer the water-based hot melt adhesive to the upper rubber roller, and gluing the base material by the upper rubber roller, wherein the gluing amount is 2-4.5 g/m2(ii) a Wherein the gap between the metering roller and the gluing roller is 3-9 μm; the rotating directions of the sizing roller and the metering roller are the same as the rotating direction of the press roller, and the rotating direction of the transfer roller is opposite to the rotating direction of the press roller; the rotating speed of the transfer roller is 71-164 r/min, the rotating speed of the sizing roller is 45-107 r/min, and the rotating speed of the metering roller is 38-78 r/min;
3) drying the base material glued in the step 2) by hot air through a drying tunnel to volatilize water, wherein the drying tunnel has four sections of temperature control, and the four sections of temperature of the drying tunnel in the hot air drying process are specifically as follows: the first-stage temperature is 90-110 ℃, the second-stage temperature is 100-120 ℃, the third-stage temperature is 110-130 ℃ and the fourth-stage temperature is 80-100 ℃;
4) and (4) rolling the glued base material in the step 3) to obtain the water-based hot-melt adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810935024.4A CN109266234B (en) | 2018-09-07 | 2018-09-07 | Coating process of water-based hot-melt adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810935024.4A CN109266234B (en) | 2018-09-07 | 2018-09-07 | Coating process of water-based hot-melt adhesive tape |
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Denomination of invention: A kind of coating process of water-based hot melt adhesive tape Effective date of registration: 20220812 Granted publication date: 20210511 Pledgee: Bank of Jiangsu Wuxi branch Limited by Share Ltd. Huishan Pledgor: JIANGSU KEMAITE TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2022320010461 |